From c4d76fc8ce6022f20dbde368968b596190db166c Mon Sep 17 00:00:00 2001
From: Christian Basler <chrigu.meyer@gmail.com>
Date: Tue, 19 Jan 2016 20:50:58 +0100
Subject: [PATCH] Code cleanup - most notably BitmessageService was cleaned up
 and doesn't use messaging anymore

---
 app/src/main/AndroidManifest.xml              |   9 +-
 .../apps/abit/AbstractItemListFragment.java   |  13 +-
 .../apps/abit/ComposeMessageActivity.java     |  18 ++-
 .../apps/abit/ComposeMessageFragment.java     |  17 +-
 .../java/ch/dissem/apps/abit/Identicon.java   |   6 +-
 .../ch/dissem/apps/abit/MainActivity.java     | 144 ++++++-----------
 .../apps/abit/MessageDetailActivity.java      |   1 +
 .../apps/abit/MessageDetailFragment.java      |  45 ++++--
 .../dissem/apps/abit/MessageListFragment.java |  16 ++
 .../apps/abit/OpenBitmessageLinkActivity.java |  71 +--------
 .../ch/dissem/apps/abit/SettingsActivity.java |   1 +
 .../ch/dissem/apps/abit/SettingsFragment.java |  16 ++
 .../ch/dissem/apps/abit/StatusActivity.java   |  18 ++-
 .../apps/abit/SubscriptionDetailActivity.java |   1 +
 .../abit/adapter/AndroidCryptography.java     |  37 ++---
 .../apps/abit/adapter/ContactAdapter.java     |  16 ++
 .../adapter/SwitchingProofOfWorkEngine.java   |  19 ++-
 .../apps/abit/listener/ActionBarListener.java |   2 +-
 .../abit/listener/ListSelectionListener.java  |   2 +-
 .../apps/abit/listener/MessageListener.java   |  41 +----
 .../apps/abit/listener/WifiReceiver.java      |  16 ++
 .../notification/AbstractNotification.java    |  16 ++
 .../abit/notification/ErrorNotification.java  |  21 ++-
 .../notification/NetworkNotification.java     |  16 ++
 .../notification/NewMessageNotification.java  |  45 +++++-
 .../notification/ProofOfWorkNotification.java |  16 ++
 .../dissem/apps/abit/pow/ServerPowEngine.java |  16 ++
 .../abit/repository/AndroidInventory.java     |  26 ++--
 .../AndroidProofOfWorkRepository.java         |  16 ++
 .../apps/abit/service/BitmessageService.java  | 146 ++++--------------
 .../apps/abit/service/ProofOfWorkService.java |  16 ++
 .../apps/abit/service/ServicePowEngine.java   |  16 ++
 .../dissem/apps/abit/service/Singleton.java   |  16 ++
 .../abit/synchronization/Authenticator.java   |  16 ++
 .../synchronization/AuthenticatorService.java |  16 ++
 .../abit/synchronization/StubProvider.java    |  27 +++-
 .../abit/synchronization/SyncAdapter.java     |  16 ++
 .../abit/synchronization/SyncService.java     |  20 ++-
 .../java/ch/dissem/apps/abit/util/Assets.java |   9 --
 .../ch/dissem/apps/abit/util/Constants.java   |  16 ++
 .../ch/dissem/apps/abit/util/Drawables.java   |   2 +-
 .../ch/dissem/apps/abit/util/PRNGFixes.java   |   7 +-
 .../ch/dissem/apps/abit/util/Preferences.java |  16 ++
 .../layout-w720dp/activity_message_list.xml   |   4 +-
 .../main/res/layout/activity_message_list.xml |   4 +-
 .../layout/activity_open_bitmessage_link.xml  |   7 +-
 app/src/main/res/layout/activity_status.xml   |   3 +-
 app/src/main/res/layout/contact_row.xml       |  15 +-
 .../res/layout/fragment_contact_detail.xml    |  10 +-
 .../main/res/layout/fragment_contact_list.xml |   2 -
 .../res/layout/fragment_message_detail.xml    |  20 ++-
 .../main/res/layout/fragment_message_list.xml |   2 -
 app/src/main/res/layout/message_row.xml       |  14 +-
 app/src/main/res/layout/subscription_row.xml  |  14 +-
 app/src/main/res/layout/toolbar_layout.xml    |   6 +-
 app/src/main/res/menu/compose.xml             |   2 +-
 app/src/main/res/menu/main.xml                |   4 -
 .../main/res/values/library_jabit_strings.xml |   2 +-
 58 files changed, 661 insertions(+), 468 deletions(-)
 delete mode 100644 app/src/main/res/menu/main.xml

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 5738a48..1eb392b 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -15,7 +15,7 @@
     <uses-permission android:name="android.permission.WRITE_CONTACTS"/>
 
     <application
-        android:allowBackup="true"
+        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme">
@@ -114,7 +114,9 @@
             android:exported="false"
             android:syncable="true"/>
 
-        <service android:name=".synchronization.AuthenticatorService">
+        <service
+            android:name=".synchronization.AuthenticatorService"
+            tools:ignore="ExportedService">
             <intent-filter>
                 <action android:name="android.accounts.AccountAuthenticator"/>
             </intent-filter>
@@ -125,7 +127,8 @@
         </service>
         <service
             android:name=".synchronization.SyncService"
-            android:exported="true">
+            android:exported="true"
+            tools:ignore="ExportedService">
             <intent-filter>
                 <action android:name="android.content.SyncAdapter"/>
             </intent-filter>
diff --git a/app/src/main/java/ch/dissem/apps/abit/AbstractItemListFragment.java b/app/src/main/java/ch/dissem/apps/abit/AbstractItemListFragment.java
index 7b03a55..5895277 100644
--- a/app/src/main/java/ch/dissem/apps/abit/AbstractItemListFragment.java
+++ b/app/src/main/java/ch/dissem/apps/abit/AbstractItemListFragment.java
@@ -16,7 +16,6 @@
 
 package ch.dissem.apps.abit;
 
-import android.app.Activity;
 import android.content.Context;
 import android.os.Bundle;
 import android.support.v4.app.ListFragment;
@@ -27,7 +26,7 @@ import ch.dissem.apps.abit.listener.ListSelectionListener;
 import ch.dissem.bitmessage.entity.valueobject.Label;
 
 /**
- * Created by chris on 07.09.15.
+ * @author Christian Basler
  */
 public abstract class AbstractItemListFragment<T> extends ListFragment {
     /**
@@ -39,7 +38,8 @@ public abstract class AbstractItemListFragment<T> extends ListFragment {
      * A dummy implementation of the {@link ListSelectionListener} interface that does
      * nothing. Used only when this fragment is not attached to an activity.
      */
-    private static ListSelectionListener<Object> dummyCallbacks = new ListSelectionListener<Object>() {
+    private static ListSelectionListener<Object> dummyCallbacks = new
+            ListSelectionListener<Object>() {
         @Override
         public void onItemSelected(Object plaintext) {
         }
@@ -84,11 +84,13 @@ public abstract class AbstractItemListFragment<T> extends ListFragment {
         super.onAttach(context);
 
         // Activities containing this fragment must implement its callbacks.
-        if (!(context instanceof ListSelectionListener)) {
+        if (context instanceof ListSelectionListener) {
+            //noinspection unchecked
+            callbacks = (ListSelectionListener) context;
+        } else {
             throw new IllegalStateException("Activity must implement fragment's callbacks.");
         }
 
-        callbacks = (ListSelectionListener) context;
     }
 
     @Override
@@ -105,6 +107,7 @@ public abstract class AbstractItemListFragment<T> extends ListFragment {
 
         // Notify the active callbacks interface (the activity, if the
         // fragment is attached to one) that an item has been selected.
+        //noinspection unchecked
         callbacks.onItemSelected((T) listView.getItemAtPosition(position));
     }
 
diff --git a/app/src/main/java/ch/dissem/apps/abit/ComposeMessageActivity.java b/app/src/main/java/ch/dissem/apps/abit/ComposeMessageActivity.java
index a8f35fc..f6a2e38 100644
--- a/app/src/main/java/ch/dissem/apps/abit/ComposeMessageActivity.java
+++ b/app/src/main/java/ch/dissem/apps/abit/ComposeMessageActivity.java
@@ -1,9 +1,24 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit;
 
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
-import ch.dissem.bitmessage.entity.BitmessageAddress;
 
 /**
  * Compose a new message.
@@ -20,6 +35,7 @@ public class ComposeMessageActivity extends AppCompatActivity {
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
+        //noinspection ConstantConditions
         getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_action_close);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setHomeButtonEnabled(false);
diff --git a/app/src/main/java/ch/dissem/apps/abit/ComposeMessageFragment.java b/app/src/main/java/ch/dissem/apps/abit/ComposeMessageFragment.java
index e262d29..9184996 100644
--- a/app/src/main/java/ch/dissem/apps/abit/ComposeMessageFragment.java
+++ b/app/src/main/java/ch/dissem/apps/abit/ComposeMessageFragment.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit;
 
 import android.os.Bundle;
@@ -8,7 +24,6 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.inputmethod.EditorInfo;
 import android.widget.AdapterView;
 import android.widget.AutoCompleteTextView;
 import android.widget.EditText;
diff --git a/app/src/main/java/ch/dissem/apps/abit/Identicon.java b/app/src/main/java/ch/dissem/apps/abit/Identicon.java
index 08ad67e..288e27e 100644
--- a/app/src/main/java/ch/dissem/apps/abit/Identicon.java
+++ b/app/src/main/java/ch/dissem/apps/abit/Identicon.java
@@ -16,13 +16,12 @@
 
 package ch.dissem.apps.abit;
 
-
 import android.graphics.*;
 import android.graphics.drawable.Drawable;
 import ch.dissem.bitmessage.entity.BitmessageAddress;
 
 /**
- *
+ * @author Christian Basler
  */
 public class Identicon extends Drawable {
     private static final int SIZE = 9;
@@ -34,7 +33,6 @@ public class Identicon extends Drawable {
 
     private float cellWidth;
     private float cellHeight;
-    private byte[] hash;
     private int color;
     private int background;
     private boolean[][] fields;
@@ -44,7 +42,7 @@ public class Identicon extends Drawable {
         paint.setStyle(Paint.Style.FILL);
         paint.setAntiAlias(true);
 
-        hash = input.getRipe();
+        byte[] hash = input.getRipe();
 
         fields = new boolean[SIZE][SIZE];
         color = Color.HSVToColor(new float[]{Math.abs(hash[0] * hash[1] + hash[2]) % 360, 0.8f, 1.0f});
diff --git a/app/src/main/java/ch/dissem/apps/abit/MainActivity.java b/app/src/main/java/ch/dissem/apps/abit/MainActivity.java
index c6e9296..f493cb3 100644
--- a/app/src/main/java/ch/dissem/apps/abit/MainActivity.java
+++ b/app/src/main/java/ch/dissem/apps/abit/MainActivity.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit;
 
 import android.app.AlertDialog;
@@ -7,11 +23,7 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.ServiceConnection;
 import android.os.Bundle;
-import android.os.Handler;
 import android.os.IBinder;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.RemoteException;
 import android.support.v4.app.Fragment;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
@@ -39,7 +51,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.Serializable;
-import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
@@ -47,18 +58,16 @@ import java.util.List;
 import ch.dissem.apps.abit.listener.ActionBarListener;
 import ch.dissem.apps.abit.listener.ListSelectionListener;
 import ch.dissem.apps.abit.service.BitmessageService;
+import ch.dissem.apps.abit.service.BitmessageService.BitmessageBinder;
 import ch.dissem.apps.abit.service.Singleton;
 import ch.dissem.apps.abit.synchronization.SyncAdapter;
 import ch.dissem.apps.abit.util.Preferences;
+import ch.dissem.bitmessage.BitmessageContext;
 import ch.dissem.bitmessage.entity.BitmessageAddress;
 import ch.dissem.bitmessage.entity.Plaintext;
 import ch.dissem.bitmessage.entity.valueobject.Label;
-import ch.dissem.bitmessage.ports.AddressRepository;
-import ch.dissem.bitmessage.ports.MessageRepository;
 
-import static ch.dissem.apps.abit.service.BitmessageService.DATA_FIELD_IDENTITY;
-import static ch.dissem.apps.abit.service.BitmessageService.MSG_START_NODE;
-import static ch.dissem.apps.abit.service.BitmessageService.MSG_STOP_NODE;
+import static ch.dissem.apps.abit.service.BitmessageService.isRunning;
 
 
 /**
@@ -92,14 +101,12 @@ public class MainActivity extends AppCompatActivity
      */
     private boolean twoPane;
 
-    private static IncomingHandler incomingHandler = new IncomingHandler();
-    private static Messenger messenger = new Messenger(incomingHandler);
-    private static Messenger service;
+    private static BitmessageBinder service;
     private static boolean bound;
     private static ServiceConnection connection = new ServiceConnection() {
         @Override
         public void onServiceConnected(ComponentName name, IBinder service) {
-            MainActivity.service = new Messenger(service);
+            MainActivity.service = (BitmessageBinder) service;
             MainActivity.bound = true;
         }
 
@@ -112,16 +119,15 @@ public class MainActivity extends AppCompatActivity
 
     private Label selectedLabel;
 
-    private MessageRepository messageRepo;
-    private AddressRepository addressRepo;
+    private BitmessageContext bmc;
     private BitmessageAddress selectedIdentity;
+    private AccountHeader accountHeader;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        messageRepo = Singleton.getMessageRepository(this);
-        addressRepo = Singleton.getAddressRepository(this);
-        List<Label> labels = messageRepo.getLabels();
+        bmc = Singleton.getBitmessageContext(this);
+        List<Label> labels = bmc.messages().getLabels();
         if (selectedLabel == null) {
             selectedLabel = labels.get(0);
         }
@@ -179,7 +185,7 @@ public class MainActivity extends AppCompatActivity
 
     private void createDrawer(Toolbar toolbar, Collection<Label> labels) {
         final ArrayList<IProfile> profiles = new ArrayList<>();
-        for (BitmessageAddress identity : addressRepo.getIdentities()) {
+        for (BitmessageAddress identity : bmc.addresses().getIdentities()) {
             LOG.info("Adding identity " + identity.getAddress());
             profiles.add(new ProfileDrawerItem()
                             .withIcon(new Identicon(identity))
@@ -188,7 +194,7 @@ public class MainActivity extends AppCompatActivity
                             .withTag(identity)
             );
         }
-        if (profiles.isEmpty()){
+        if (profiles.isEmpty()) {
             // Create an initial identity
             BitmessageAddress identity = Singleton.getIdentity(this);
             profiles.add(new ProfileDrawerItem()
@@ -212,7 +218,7 @@ public class MainActivity extends AppCompatActivity
                         .withIcon(GoogleMaterial.Icon.gmd_settings)
         );
         // Create the AccountHeader
-        AccountHeader accountHeader = new AccountHeaderBuilder()
+        accountHeader = new AccountHeaderBuilder()
                 .withActivity(this)
                 .withHeaderBackground(R.drawable.header)
                 .withProfiles(profiles)
@@ -221,13 +227,18 @@ public class MainActivity extends AppCompatActivity
                     public boolean onProfileChanged(View view, IProfile profile, boolean
                             currentProfile) {
                         if (profile.getIdentifier() == ADD_IDENTITY) {
-                            try {
-                                Message message = Message.obtain(null, BitmessageService
-                                        .MSG_CREATE_IDENTITY);
-                                message.replyTo = messenger;
-                                service.send(message);
-                            } catch (RemoteException e) {
-                                LOG.error(e.getMessage(), e);
+                            BitmessageAddress identity = bmc.createIdentity(false);
+                            IProfile newProfile = new ProfileDrawerItem()
+                                    .withName(identity.toString())
+                                    .withEmail(identity.getAddress())
+                                    .withTag(identity);
+                            if (accountHeader.getProfiles() != null) {
+                                // we know that there are 2 setting elements.
+                                // Set the new profile above them ;)
+                                accountHeader.addProfile(
+                                        newProfile, accountHeader.getProfiles().size() - 2);
+                            } else {
+                                accountHeader.addProfiles(newProfile);
                             }
                         } else if (profile instanceof ProfileDrawerItem) {
                             Object tag = ((ProfileDrawerItem) profile).getTag();
@@ -243,7 +254,6 @@ public class MainActivity extends AppCompatActivity
         if (profiles.size() > 2) { // There's always the add and manage identity items
             accountHeader.setActiveProfile(profiles.get(0), true);
         }
-        incomingHandler.updateAccountHeader(accountHeader);
 
         ArrayList<IDrawerItem> drawerItems = new ArrayList<>();
         for (Label label : labels) {
@@ -299,23 +309,16 @@ public class MainActivity extends AppCompatActivity
                         new SwitchDrawerItem()
                                 .withName(R.string.full_node)
                                 .withIcon(CommunityMaterial.Icon.cmd_cloud_outline)
-                                .withChecked(BitmessageService.isRunning())
+                                .withChecked(isRunning())
                                 .withOnCheckedChangeListener(new OnCheckedChangeListener() {
                                     @Override
                                     public void onCheckedChanged(IDrawerItem drawerItem,
                                                                  CompoundButton buttonView,
                                                                  boolean isChecked) {
-                                        if (messenger != null) {
-                                            if (isChecked) {
-                                                checkAndStartNode(buttonView);
-                                            } else {
-                                                try {
-                                                    service.send(Message.obtain(null,
-                                                            MSG_STOP_NODE));
-                                                } catch (RemoteException e) {
-                                                    LOG.error(e.getMessage(), e);
-                                                }
-                                            }
+                                        if (isChecked) {
+                                            checkAndStartNode(buttonView);
+                                        } else {
+                                            service.shutdownNode();
                                         }
                                     }
                                 })
@@ -361,15 +364,17 @@ public class MainActivity extends AppCompatActivity
     }
 
     private void checkAndStartNode(final CompoundButton buttonView) {
+        if (service == null) return;
+
         if (Preferences.isConnectionAllowed(MainActivity.this)) {
-            forceStartNode();
+            service.startupNode();
         } else {
             new AlertDialog.Builder(MainActivity.this)
                     .setMessage(R.string.full_node_warning)
                     .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
                         @Override
                         public void onClick(DialogInterface dialog, int which) {
-                            forceStartNode();
+                            service.startupNode();
                         }
                     })
                     .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
@@ -382,15 +387,6 @@ public class MainActivity extends AppCompatActivity
         }
     }
 
-    private void forceStartNode() {
-        try {
-            service.send(Message.obtain(null,
-                    MSG_START_NODE));
-        } catch (RemoteException e) {
-            LOG.error(e.getMessage(), e);
-        }
-    }
-
     private void showSelectedLabel() {
         if (getSupportFragmentManager().findFragmentById(R.id.item_list) instanceof
                 MessageListFragment) {
@@ -476,46 +472,4 @@ public class MainActivity extends AppCompatActivity
     public BitmessageAddress getSelectedIdentity() {
         return selectedIdentity;
     }
-
-    private static class IncomingHandler extends Handler {
-        private WeakReference<AccountHeader> accountHeaderRef;
-
-        private IncomingHandler() {
-            accountHeaderRef = new WeakReference<>(null);
-        }
-
-        public void updateAccountHeader(AccountHeader accountHeader) {
-            accountHeaderRef = new WeakReference<>(accountHeader);
-        }
-
-        @Override
-        public void handleMessage(Message msg) {
-            switch (msg.what) {
-                case BitmessageService.MSG_CREATE_IDENTITY: {
-                    AccountHeader accountHeader = accountHeaderRef.get();
-                    if (accountHeader == null) break;
-
-                    Serializable data = msg.getData().getSerializable(DATA_FIELD_IDENTITY);
-                    if (data instanceof BitmessageAddress) {
-                        BitmessageAddress identity = (BitmessageAddress) data;
-                        IProfile newProfile = new ProfileDrawerItem()
-                                .withName(identity.toString())
-                                .withEmail(identity.getAddress())
-                                .withTag(identity);
-                        if (accountHeader.getProfiles() != null) {
-                            //we know that there are 2 setting elements. set the new profile
-                            // above them ;)
-                            accountHeader.addProfile(newProfile, accountHeader.getProfiles().size
-                                    () - 2);
-                        } else {
-                            accountHeader.addProfiles(newProfile);
-                        }
-                    }
-                    break;
-                }
-                default:
-                    super.handleMessage(msg);
-            }
-        }
-    }
 }
diff --git a/app/src/main/java/ch/dissem/apps/abit/MessageDetailActivity.java b/app/src/main/java/ch/dissem/apps/abit/MessageDetailActivity.java
index 22012c5..77be840 100644
--- a/app/src/main/java/ch/dissem/apps/abit/MessageDetailActivity.java
+++ b/app/src/main/java/ch/dissem/apps/abit/MessageDetailActivity.java
@@ -27,6 +27,7 @@ public class MessageDetailActivity extends AppCompatActivity {
         final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
         // Show the Up button in the action bar.
+        //noinspection ConstantConditions
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
         // savedInstanceState is non-null when there is fragment state
diff --git a/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.java b/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.java
index 438e2f2..21a9d3f 100644
--- a/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.java
+++ b/app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit;
 
 import android.content.Intent;
@@ -79,7 +95,8 @@ public class MessageDetailFragment extends Fragment {
         if (item != null) {
             ((TextView) rootView.findViewById(R.id.subject)).setText(item.getSubject());
             BitmessageAddress sender = item.getFrom();
-            ((ImageView) rootView.findViewById(R.id.avatar)).setImageDrawable(new Identicon(sender));
+            ((ImageView) rootView.findViewById(R.id.avatar)).setImageDrawable(new Identicon
+                    (sender));
             ((TextView) rootView.findViewById(R.id.sender)).setText(sender.toString());
             if (item.getTo() != null) {
                 ((TextView) rootView.findViewById(R.id.recipient)).setText(item.getTo().toString());
@@ -99,18 +116,18 @@ public class MessageDetailFragment extends Fragment {
 
             messageBody.setLinksClickable(true);
             messageBody.setTextIsSelectable(true);
-        }
 
-        boolean removed = false;
-        Iterator<Label> labels = item.getLabels().iterator();
-        while (labels.hasNext()) {
-            if (labels.next().getType() == Label.Type.UNREAD) {
-                labels.remove();
-                removed = true;
+            boolean removed = false;
+            Iterator<Label> labels = item.getLabels().iterator();
+            while (labels.hasNext()) {
+                if (labels.next().getType() == Label.Type.UNREAD) {
+                    labels.remove();
+                    removed = true;
+                }
+            }
+            if (removed) {
+                Singleton.getMessageRepository(inflater.getContext()).save(item);
             }
-        }
-        if (removed) {
-            Singleton.getMessageRepository(inflater.getContext()).save(item);
         }
         return rootView;
     }
@@ -121,7 +138,8 @@ public class MessageDetailFragment extends Fragment {
 
         Drawables.addIcon(getActivity(), menu, R.id.reply, GoogleMaterial.Icon.gmd_reply);
         Drawables.addIcon(getActivity(), menu, R.id.delete, GoogleMaterial.Icon.gmd_delete);
-        Drawables.addIcon(getActivity(), menu, R.id.mark_unread, GoogleMaterial.Icon.gmd_markunread);
+        Drawables.addIcon(getActivity(), menu, R.id.mark_unread, GoogleMaterial.Icon
+                .gmd_markunread);
         Drawables.addIcon(getActivity(), menu, R.id.archive, GoogleMaterial.Icon.gmd_archive);
 
         super.onCreateOptionsMenu(menu, inflater);
@@ -132,7 +150,8 @@ public class MessageDetailFragment extends Fragment {
         MessageRepository messageRepo = Singleton.getMessageRepository(getContext());
         switch (menuItem.getItemId()) {
             case R.id.reply:
-                Intent replyIntent = new Intent(getActivity().getApplicationContext(), ComposeMessageActivity.class);
+                Intent replyIntent = new Intent(getActivity().getApplicationContext(),
+                        ComposeMessageActivity.class);
                 replyIntent.putExtra(ComposeMessageActivity.EXTRA_RECIPIENT, item.getFrom());
                 replyIntent.putExtra(ComposeMessageActivity.EXTRA_IDENTITY, item.getTo());
                 startActivity(replyIntent);
diff --git a/app/src/main/java/ch/dissem/apps/abit/MessageListFragment.java b/app/src/main/java/ch/dissem/apps/abit/MessageListFragment.java
index e844320..c4b0d1f 100644
--- a/app/src/main/java/ch/dissem/apps/abit/MessageListFragment.java
+++ b/app/src/main/java/ch/dissem/apps/abit/MessageListFragment.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit;
 
 import android.content.Intent;
diff --git a/app/src/main/java/ch/dissem/apps/abit/OpenBitmessageLinkActivity.java b/app/src/main/java/ch/dissem/apps/abit/OpenBitmessageLinkActivity.java
index 138ab77..9f2fd4c 100644
--- a/app/src/main/java/ch/dissem/apps/abit/OpenBitmessageLinkActivity.java
+++ b/app/src/main/java/ch/dissem/apps/abit/OpenBitmessageLinkActivity.java
@@ -17,16 +17,8 @@
 package ch.dissem.apps.abit;
 
 import android.app.Activity;
-import android.content.ComponentName;
-import android.content.Context;
-import android.content.Intent;
-import android.content.ServiceConnection;
 import android.net.Uri;
 import android.os.Bundle;
-import android.os.IBinder;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.RemoteException;
 import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 import android.widget.Button;
@@ -34,35 +26,11 @@ import android.widget.EditText;
 import android.widget.Switch;
 import android.widget.TextView;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import ch.dissem.apps.abit.service.BitmessageService;
+import ch.dissem.apps.abit.service.Singleton;
+import ch.dissem.bitmessage.BitmessageContext;
 import ch.dissem.bitmessage.entity.BitmessageAddress;
 
-import static ch.dissem.apps.abit.service.BitmessageService.DATA_FIELD_ADDRESS;
-import static ch.dissem.apps.abit.service.BitmessageService.MSG_ADD_CONTACT;
-import static ch.dissem.apps.abit.service.BitmessageService.MSG_SUBSCRIBE;
-
 public class OpenBitmessageLinkActivity extends AppCompatActivity {
-    private static final Logger LOG = LoggerFactory.getLogger(OpenBitmessageLinkActivity.class);
-
-    private Messenger service;
-    private boolean bound;
-    private ServiceConnection connection = new ServiceConnection() {
-        @Override
-        public void onServiceConnected(ComponentName name, IBinder service) {
-            OpenBitmessageLinkActivity.this.service = new Messenger(service);
-            OpenBitmessageLinkActivity.this.bound = true;
-        }
-
-        @Override
-        public void onServiceDisconnected(ComponentName name) {
-            service = null;
-            bound = false;
-        }
-    };
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -103,20 +71,11 @@ public class OpenBitmessageLinkActivity extends AppCompatActivity {
                 BitmessageAddress bmAddress = new BitmessageAddress(address);
                 bmAddress.setAlias(label.getText().toString());
 
-                final int what;
-                if (subscribe.isChecked())
-                    what = MSG_SUBSCRIBE;
-                else
-                    what = MSG_ADD_CONTACT;
-
-                try {
-                    Message message = Message.obtain(null, what);
-                    Bundle bundle = new Bundle();
-                    bundle.putSerializable(DATA_FIELD_ADDRESS, bmAddress);
-                    message.setData(bundle);
-                    service.send(message);
-                } catch (RemoteException e) {
-                    LOG.error(e.getMessage(), e);
+                BitmessageContext bmc = Singleton.getBitmessageContext(OpenBitmessageLinkActivity
+                        .this);
+                bmc.addContact(bmAddress);
+                if (subscribe.isChecked()) {
+                    bmc.addSubscribtion(bmAddress);
                 }
 
                 setResult(Activity.RESULT_OK);
@@ -150,20 +109,4 @@ public class OpenBitmessageLinkActivity extends AppCompatActivity {
             return new String[0];
         }
     }
-
-    @Override
-    protected void onStart() {
-        super.onStart();
-        bindService(new Intent(this, BitmessageService.class), connection, Context
-                .BIND_AUTO_CREATE);
-    }
-
-    @Override
-    protected void onStop() {
-        if (bound) {
-            unbindService(connection);
-            bound = false;
-        }
-        super.onStop();
-    }
 }
diff --git a/app/src/main/java/ch/dissem/apps/abit/SettingsActivity.java b/app/src/main/java/ch/dissem/apps/abit/SettingsActivity.java
index f7f7acb..9199c42 100644
--- a/app/src/main/java/ch/dissem/apps/abit/SettingsActivity.java
+++ b/app/src/main/java/ch/dissem/apps/abit/SettingsActivity.java
@@ -16,6 +16,7 @@ public class SettingsActivity extends AppCompatActivity {
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
+        //noinspection ConstantConditions
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setHomeButtonEnabled(false);
 
diff --git a/app/src/main/java/ch/dissem/apps/abit/SettingsFragment.java b/app/src/main/java/ch/dissem/apps/abit/SettingsFragment.java
index dc638e7..60ecbeb 100644
--- a/app/src/main/java/ch/dissem/apps/abit/SettingsFragment.java
+++ b/app/src/main/java/ch/dissem/apps/abit/SettingsFragment.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit;
 
 import android.content.Context;
diff --git a/app/src/main/java/ch/dissem/apps/abit/StatusActivity.java b/app/src/main/java/ch/dissem/apps/abit/StatusActivity.java
index 60886b2..1babcf6 100644
--- a/app/src/main/java/ch/dissem/apps/abit/StatusActivity.java
+++ b/app/src/main/java/ch/dissem/apps/abit/StatusActivity.java
@@ -1,7 +1,22 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit;
 
 import android.os.Bundle;
-import android.app.Activity;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.widget.TextView;
@@ -20,6 +35,7 @@ public class StatusActivity extends AppCompatActivity {
         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
+        //noinspection ConstantConditions
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setHomeButtonEnabled(false);
 
diff --git a/app/src/main/java/ch/dissem/apps/abit/SubscriptionDetailActivity.java b/app/src/main/java/ch/dissem/apps/abit/SubscriptionDetailActivity.java
index f8c8faf..cc83451 100644
--- a/app/src/main/java/ch/dissem/apps/abit/SubscriptionDetailActivity.java
+++ b/app/src/main/java/ch/dissem/apps/abit/SubscriptionDetailActivity.java
@@ -43,6 +43,7 @@ public class SubscriptionDetailActivity extends AppCompatActivity {
         final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
         // Show the Up button in the action bar.
+        //noinspection ConstantConditions
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 
         // savedInstanceState is non-null when there is fragment state
diff --git a/app/src/main/java/ch/dissem/apps/abit/adapter/AndroidCryptography.java b/app/src/main/java/ch/dissem/apps/abit/adapter/AndroidCryptography.java
index 8aed5be..07c7e61 100644
--- a/app/src/main/java/ch/dissem/apps/abit/adapter/AndroidCryptography.java
+++ b/app/src/main/java/ch/dissem/apps/abit/adapter/AndroidCryptography.java
@@ -1,28 +1,23 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.adapter;
 
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-
 import ch.dissem.apps.abit.util.PRNGFixes;
-import ch.dissem.bitmessage.entity.BitmessageAddress;
-import ch.dissem.bitmessage.entity.ObjectMessage;
-import ch.dissem.bitmessage.entity.Plaintext;
-import ch.dissem.bitmessage.entity.PlaintextHolder;
-import ch.dissem.bitmessage.entity.payload.Broadcast;
-import ch.dissem.bitmessage.entity.valueobject.Label;
-import ch.dissem.bitmessage.factory.Factory;
-import ch.dissem.bitmessage.ports.ProofOfWorkEngine;
 import ch.dissem.bitmessage.cryptography.sc.SpongyCryptography;
-import ch.dissem.bitmessage.utils.UnixTime;
-
-import static ch.dissem.apps.abit.util.Constants.PREFERENCE_SERVER_POW;
-import static ch.dissem.bitmessage.entity.Plaintext.Status.SENT;
-import static ch.dissem.bitmessage.entity.Plaintext.Type.BROADCAST;
-import static ch.dissem.bitmessage.utils.UnixTime.DAY;
 
 /**
  * @author Christian Basler
diff --git a/app/src/main/java/ch/dissem/apps/abit/adapter/ContactAdapter.java b/app/src/main/java/ch/dissem/apps/abit/adapter/ContactAdapter.java
index 2d0946e..1951985 100644
--- a/app/src/main/java/ch/dissem/apps/abit/adapter/ContactAdapter.java
+++ b/app/src/main/java/ch/dissem/apps/abit/adapter/ContactAdapter.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.adapter;
 
 import android.content.Context;
diff --git a/app/src/main/java/ch/dissem/apps/abit/adapter/SwitchingProofOfWorkEngine.java b/app/src/main/java/ch/dissem/apps/abit/adapter/SwitchingProofOfWorkEngine.java
index d129e07..3e0d545 100644
--- a/app/src/main/java/ch/dissem/apps/abit/adapter/SwitchingProofOfWorkEngine.java
+++ b/app/src/main/java/ch/dissem/apps/abit/adapter/SwitchingProofOfWorkEngine.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.adapter;
 
 import android.content.Context;
@@ -6,12 +22,9 @@ import android.preference.PreferenceManager;
 
 import java.util.Arrays;
 
-import ch.dissem.apps.abit.util.Preferences;
 import ch.dissem.bitmessage.InternalContext;
 import ch.dissem.bitmessage.ports.ProofOfWorkEngine;
 
-import static ch.dissem.apps.abit.util.Constants.PREFERENCE_SERVER_POW;
-
 /**
  * Switches between two {@link ProofOfWorkEngine}s depending on the configuration.
  *
diff --git a/app/src/main/java/ch/dissem/apps/abit/listener/ActionBarListener.java b/app/src/main/java/ch/dissem/apps/abit/listener/ActionBarListener.java
index 7dfcdf2..d1e1ea4 100644
--- a/app/src/main/java/ch/dissem/apps/abit/listener/ActionBarListener.java
+++ b/app/src/main/java/ch/dissem/apps/abit/listener/ActionBarListener.java
@@ -17,7 +17,7 @@
 package ch.dissem.apps.abit.listener;
 
 /**
- * Created by chris on 06.09.15.
+ * @author Christian Basler
  */
 public interface ActionBarListener {
     void updateTitle(CharSequence title);
diff --git a/app/src/main/java/ch/dissem/apps/abit/listener/ListSelectionListener.java b/app/src/main/java/ch/dissem/apps/abit/listener/ListSelectionListener.java
index 03fdc19..42e4732 100644
--- a/app/src/main/java/ch/dissem/apps/abit/listener/ListSelectionListener.java
+++ b/app/src/main/java/ch/dissem/apps/abit/listener/ListSelectionListener.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Christian Basler
+ * Copyright 2016 Christian Basler
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/app/src/main/java/ch/dissem/apps/abit/listener/MessageListener.java b/app/src/main/java/ch/dissem/apps/abit/listener/MessageListener.java
index 16acfbd..b25fdfc 100644
--- a/app/src/main/java/ch/dissem/apps/abit/listener/MessageListener.java
+++ b/app/src/main/java/ch/dissem/apps/abit/listener/MessageListener.java
@@ -16,60 +16,32 @@
 
 package ch.dissem.apps.abit.listener;
 
-import android.annotation.TargetApi;
-import android.app.NotificationManager;
 import android.content.Context;
-import android.database.Cursor;
-import android.net.Uri;
-import android.os.Build;
-import android.provider.ContactsContract;
-import android.support.v7.app.NotificationCompat;
+
+import java.util.Deque;
+import java.util.LinkedList;
 
 import ch.dissem.apps.abit.notification.NewMessageNotification;
 import ch.dissem.bitmessage.BitmessageContext;
 import ch.dissem.bitmessage.entity.Plaintext;
 
-import java.util.LinkedList;
-
 /**
  * Listens for decrypted Bitmessage messages. Does show a notification.
  * <p>
- * Should show a notification when the app isn't running, but update the message list when it is. Also,
+ * Should show a notification when the app isn't running, but update the message list when it is.
+ * Also,
  * notifications should be combined.
  * </p>
  */
 public class MessageListener implements BitmessageContext.Listener {
-    private final Context ctx;
-    private final NotificationManager manager;
-    private final LinkedList<Plaintext> unacknowledged = new LinkedList<>();
+    private final Deque<Plaintext> unacknowledged = new LinkedList<>();
     private int numberOfUnacknowledgedMessages = 0;
     private final NewMessageNotification notification;
 
     public MessageListener(Context ctx) {
-        this.ctx = ctx.getApplicationContext();
-        this.manager = (NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);
-
         this.notification = new NewMessageNotification(ctx);
     }
 
-    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
-    public static int getMaxContactPhotoSize(final Context context) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
-            // Note that this URI is safe to call on the UI thread.
-            final Uri uri = ContactsContract.DisplayPhoto.CONTENT_MAX_DIMENSIONS_URI;
-            final String[] projection = new String[]{ContactsContract.DisplayPhoto.DISPLAY_MAX_DIM};
-            final Cursor c = context.getContentResolver().query(uri, projection, null, null, null);
-            try {
-                c.moveToFirst();
-                return c.getInt(0);
-            } finally {
-                c.close();
-            }
-        }
-        // fallback: 96x96 is the max contact photo size for pre-ICS versions
-        return 96;
-    }
-
     @Override
     public void receive(final Plaintext plaintext) {
         synchronized (unacknowledged) {
@@ -80,7 +52,6 @@ public class MessageListener implements BitmessageContext.Listener {
             }
         }
 
-        NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
         if (numberOfUnacknowledgedMessages == 1) {
             notification.singleNotification(plaintext);
         } else {
diff --git a/app/src/main/java/ch/dissem/apps/abit/listener/WifiReceiver.java b/app/src/main/java/ch/dissem/apps/abit/listener/WifiReceiver.java
index 74df713..e4ea8e0 100644
--- a/app/src/main/java/ch/dissem/apps/abit/listener/WifiReceiver.java
+++ b/app/src/main/java/ch/dissem/apps/abit/listener/WifiReceiver.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.listener;
 
 import android.content.BroadcastReceiver;
diff --git a/app/src/main/java/ch/dissem/apps/abit/notification/AbstractNotification.java b/app/src/main/java/ch/dissem/apps/abit/notification/AbstractNotification.java
index 21ff505..7573dc9 100644
--- a/app/src/main/java/ch/dissem/apps/abit/notification/AbstractNotification.java
+++ b/app/src/main/java/ch/dissem/apps/abit/notification/AbstractNotification.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.notification;
 
 import android.app.Notification;
diff --git a/app/src/main/java/ch/dissem/apps/abit/notification/ErrorNotification.java b/app/src/main/java/ch/dissem/apps/abit/notification/ErrorNotification.java
index c64185e..0efdc66 100644
--- a/app/src/main/java/ch/dissem/apps/abit/notification/ErrorNotification.java
+++ b/app/src/main/java/ch/dissem/apps/abit/notification/ErrorNotification.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.notification;
 
 import android.content.Context;
@@ -7,7 +23,10 @@ import android.support.v7.app.NotificationCompat;
 import ch.dissem.apps.abit.R;
 
 /**
- * Created by chrigu on 29.10.15.
+ * Easily create notifications with error messages. Use carefully, users probably won't like them.
+ * (But they are useful during development/testing)
+ *
+ * @author Christian Basler
  */
 public class ErrorNotification extends AbstractNotification {
     public static final int ERROR_NOTIFICATION_ID = 4;
diff --git a/app/src/main/java/ch/dissem/apps/abit/notification/NetworkNotification.java b/app/src/main/java/ch/dissem/apps/abit/notification/NetworkNotification.java
index 6236546..d11c0c9 100644
--- a/app/src/main/java/ch/dissem/apps/abit/notification/NetworkNotification.java
+++ b/app/src/main/java/ch/dissem/apps/abit/notification/NetworkNotification.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.notification;
 
 import android.annotation.SuppressLint;
diff --git a/app/src/main/java/ch/dissem/apps/abit/notification/NewMessageNotification.java b/app/src/main/java/ch/dissem/apps/abit/notification/NewMessageNotification.java
index efe1f8e..246ea6d 100644
--- a/app/src/main/java/ch/dissem/apps/abit/notification/NewMessageNotification.java
+++ b/app/src/main/java/ch/dissem/apps/abit/notification/NewMessageNotification.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.notification;
 
 import android.app.PendingIntent;
@@ -10,7 +26,7 @@ import android.text.SpannableString;
 import android.text.Spanned;
 import android.text.style.StyleSpan;
 
-import java.util.LinkedList;
+import java.util.Collection;
 
 import ch.dissem.apps.abit.Identicon;
 import ch.dissem.apps.abit.MainActivity;
@@ -29,8 +45,10 @@ public class NewMessageNotification extends AbstractNotification {
 
     public NewMessageNotification singleNotification(Plaintext plaintext) {
         NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
-        Spannable bigText = new SpannableString(plaintext.getSubject() + "\n" + plaintext.getText());
-        bigText.setSpan(SPAN_EMPHASIS, 0, plaintext.getSubject().length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
+        Spannable bigText = new SpannableString(plaintext.getSubject() + "\n" + plaintext.getText
+                ());
+        bigText.setSpan(SPAN_EMPHASIS, 0, plaintext.getSubject().length(), Spanned
+                .SPAN_INCLUSIVE_EXCLUSIVE);
         builder.setSmallIcon(R.drawable.ic_notification_new_message)
                 .setLargeIcon(toBitmap(new Identicon(plaintext.getFrom()), 192))
                 .setContentTitle(plaintext.getFrom().toString())
@@ -40,27 +58,38 @@ public class NewMessageNotification extends AbstractNotification {
 
         Intent showMessageIntent = new Intent(ctx, MainActivity.class);
         showMessageIntent.putExtra(MainActivity.EXTRA_SHOW_MESSAGE, plaintext);
-        PendingIntent pendingIntent = PendingIntent.getActivity(ctx, 0, showMessageIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        PendingIntent pendingIntent = PendingIntent.getActivity(ctx, 0, showMessageIntent,
+                PendingIntent.FLAG_UPDATE_CURRENT);
         builder.setContentIntent(pendingIntent);
 
         builder.addAction(R.drawable.ic_action_reply, ctx.getString(R.string.reply), pendingIntent);
-        builder.addAction(R.drawable.ic_action_delete, ctx.getString(R.string.delete), pendingIntent);
+        builder.addAction(R.drawable.ic_action_delete, ctx.getString(R.string.delete),
+                pendingIntent);
         notification = builder.build();
         return this;
     }
 
-    public NewMessageNotification multiNotification(LinkedList<Plaintext> unacknowledged, int numberOfUnacknowledgedMessages) {
+    /**
+     * @param unacknowledged will be accessed from different threads, so make sure wherever it's
+     *                       accessed it will be in a <code>synchronized(unacknowledged)
+     *                       {}</code> block
+     */
+    public NewMessageNotification multiNotification(Collection<Plaintext> unacknowledged, int
+            numberOfUnacknowledgedMessages) {
         NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
         builder.setSmallIcon(R.drawable.ic_notification_new_message)
                 .setContentTitle(ctx.getString(R.string.n_new_messages, unacknowledged.size()))
                 .setContentText(ctx.getString(R.string.app_name));
 
         NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
+        //noinspection SynchronizationOnLocalVariableOrMethodParameter
         synchronized (unacknowledged) {
-            inboxStyle.setBigContentTitle(ctx.getString(R.string.n_new_messages, numberOfUnacknowledgedMessages));
+            inboxStyle.setBigContentTitle(ctx.getString(R.string.n_new_messages,
+                    numberOfUnacknowledgedMessages));
             for (Plaintext msg : unacknowledged) {
                 Spannable sb = new SpannableString(msg.getFrom() + " " + msg.getSubject());
-                sb.setSpan(SPAN_EMPHASIS, 0, String.valueOf(msg.getFrom()).length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
+                sb.setSpan(SPAN_EMPHASIS, 0, String.valueOf(msg.getFrom()).length(), Spannable
+                        .SPAN_INCLUSIVE_EXCLUSIVE);
                 inboxStyle.addLine(sb);
             }
         }
diff --git a/app/src/main/java/ch/dissem/apps/abit/notification/ProofOfWorkNotification.java b/app/src/main/java/ch/dissem/apps/abit/notification/ProofOfWorkNotification.java
index b0b33b4..f677130 100644
--- a/app/src/main/java/ch/dissem/apps/abit/notification/ProofOfWorkNotification.java
+++ b/app/src/main/java/ch/dissem/apps/abit/notification/ProofOfWorkNotification.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.notification;
 
 import android.app.PendingIntent;
diff --git a/app/src/main/java/ch/dissem/apps/abit/pow/ServerPowEngine.java b/app/src/main/java/ch/dissem/apps/abit/pow/ServerPowEngine.java
index a8b76af..1b94aa5 100644
--- a/app/src/main/java/ch/dissem/apps/abit/pow/ServerPowEngine.java
+++ b/app/src/main/java/ch/dissem/apps/abit/pow/ServerPowEngine.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.pow;
 
 import android.content.Context;
diff --git a/app/src/main/java/ch/dissem/apps/abit/repository/AndroidInventory.java b/app/src/main/java/ch/dissem/apps/abit/repository/AndroidInventory.java
index b7fccaf..c88ca2a 100644
--- a/app/src/main/java/ch/dissem/apps/abit/repository/AndroidInventory.java
+++ b/app/src/main/java/ch/dissem/apps/abit/repository/AndroidInventory.java
@@ -21,6 +21,17 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteConstraintException;
 import android.database.sqlite.SQLiteDatabase;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
 import ch.dissem.bitmessage.entity.ObjectMessage;
 import ch.dissem.bitmessage.entity.payload.ObjectType;
 import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
@@ -28,21 +39,6 @@ import ch.dissem.bitmessage.factory.Factory;
 import ch.dissem.bitmessage.ports.Inventory;
 import ch.dissem.bitmessage.utils.Encode;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.io.ByteArrayInputStream;
-import java.io.IOException;
-import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.Iterator;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
 import static ch.dissem.apps.abit.repository.SqlHelper.join;
 import static ch.dissem.bitmessage.utils.UnixTime.MINUTE;
 import static ch.dissem.bitmessage.utils.UnixTime.now;
diff --git a/app/src/main/java/ch/dissem/apps/abit/repository/AndroidProofOfWorkRepository.java b/app/src/main/java/ch/dissem/apps/abit/repository/AndroidProofOfWorkRepository.java
index 6a96eee..6ef5cd0 100644
--- a/app/src/main/java/ch/dissem/apps/abit/repository/AndroidProofOfWorkRepository.java
+++ b/app/src/main/java/ch/dissem/apps/abit/repository/AndroidProofOfWorkRepository.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.repository;
 
 import android.content.ContentValues;
diff --git a/app/src/main/java/ch/dissem/apps/abit/service/BitmessageService.java b/app/src/main/java/ch/dissem/apps/abit/service/BitmessageService.java
index 691db2c..d2e04d8 100644
--- a/app/src/main/java/ch/dissem/apps/abit/service/BitmessageService.java
+++ b/app/src/main/java/ch/dissem/apps/abit/service/BitmessageService.java
@@ -1,26 +1,31 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.service;
 
 import android.app.Service;
-import android.content.Context;
 import android.content.Intent;
-import android.os.Bundle;
-import android.os.Handler;
+import android.os.Binder;
 import android.os.IBinder;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.RemoteException;
-import android.widget.Toast;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.Serializable;
-import java.lang.ref.WeakReference;
-
-import ch.dissem.apps.abit.R;
 import ch.dissem.apps.abit.notification.NetworkNotification;
 import ch.dissem.bitmessage.BitmessageContext;
-import ch.dissem.bitmessage.entity.BitmessageAddress;
 
 import static ch.dissem.apps.abit.notification.NetworkNotification.ONGOING_NOTIFICATION_ID;
 
@@ -32,19 +37,6 @@ import static ch.dissem.apps.abit.notification.NetworkNotification.ONGOING_NOTIF
 public class BitmessageService extends Service {
     public static final Logger LOG = LoggerFactory.getLogger(BitmessageService.class);
 
-    public static final int MSG_CREATE_IDENTITY = 10;
-    public static final int MSG_SUBSCRIBE = 20;
-    public static final int MSG_ADD_CONTACT = 21;
-    public static final int MSG_SEND_MESSAGE = 30;
-    public static final int MSG_SEND_BROADCAST = 31;
-    public static final int MSG_START_NODE = 100;
-    public static final int MSG_STOP_NODE = 101;
-
-    public static final String DATA_FIELD_IDENTITY = "identity";
-    public static final String DATA_FIELD_ADDRESS = "address";
-    public static final String DATA_FIELD_SUBJECT = "subject";
-    public static final String DATA_FIELD_MESSAGE = "message";
-
     // Object to use as a thread-safe lock
     private static final Object lock = new Object();
 
@@ -53,8 +45,6 @@ public class BitmessageService extends Service {
 
     private static volatile boolean running = false;
 
-    private static Messenger messenger;
-
     public static boolean isRunning() {
         return running && bmc.isRunning();
     }
@@ -65,7 +55,6 @@ public class BitmessageService extends Service {
             if (bmc == null) {
                 bmc = Singleton.getBitmessageContext(this);
                 notification = new NetworkNotification(this, bmc);
-                messenger = new Messenger(new IncomingHandler(this));
             }
         }
     }
@@ -81,101 +70,34 @@ public class BitmessageService extends Service {
         running = false;
     }
 
+
     /**
      * Return an object that allows the system to invoke
      * the sync adapter.
      */
     @Override
     public IBinder onBind(Intent intent) {
-        return messenger.getBinder();
+        return new BitmessageBinder();
     }
 
-    private static class IncomingHandler extends Handler {
-        private WeakReference<BitmessageService> service;
-
-        private IncomingHandler(BitmessageService service) {
-            this.service = new WeakReference<>(service);
+    public class BitmessageBinder extends Binder {
+        public void startupNode() {
+            startService(new Intent(BitmessageService.this, BitmessageService.class));
+            running = true;
+            startForeground(ONGOING_NOTIFICATION_ID, notification.getNotification());
+            if (!bmc.isRunning()) {
+                bmc.startup();
+            }
+            notification.show();
         }
 
-        @Override
-        public void handleMessage(Message msg) {
-            switch (msg.what) {
-                case MSG_CREATE_IDENTITY: {
-                    BitmessageAddress identity = bmc.createIdentity(false);
-                    if (msg.replyTo != null) {
-                        try {
-                            Message message = Message.obtain(this, MSG_CREATE_IDENTITY);
-                            Bundle bundle = new Bundle();
-                            bundle.putSerializable(DATA_FIELD_IDENTITY, identity);
-                            message.setData(bundle);
-                            msg.replyTo.send(message);
-                        } catch (RemoteException e) {
-                            LOG.debug(e.getMessage(), e);
-                        }
-                    }
-                    break;
-                }
-                case MSG_SUBSCRIBE: {
-                    Serializable data = msg.getData().getSerializable(DATA_FIELD_ADDRESS);
-                    if (data instanceof BitmessageAddress) {
-                        bmc.addSubscribtion((BitmessageAddress) data);
-                    }
-                    break;
-                }
-                case MSG_ADD_CONTACT: {
-                    Serializable data = msg.getData().getSerializable(DATA_FIELD_ADDRESS);
-                    if (data instanceof BitmessageAddress) {
-                        bmc.addContact((BitmessageAddress) data);
-                    }
-                    break;
-                }
-                case MSG_SEND_MESSAGE: {
-                    Serializable identity = msg.getData().getSerializable(DATA_FIELD_IDENTITY);
-                    Serializable address = msg.getData().getSerializable(DATA_FIELD_ADDRESS);
-                    if (identity instanceof BitmessageAddress
-                            && address instanceof BitmessageAddress) {
-                        String subject = msg.getData().getString(DATA_FIELD_SUBJECT);
-                        String message = msg.getData().getString(DATA_FIELD_MESSAGE);
-                        bmc.send((BitmessageAddress) identity, (BitmessageAddress) address,
-                                subject, message);
-                    } else {
-                        Context ctx = service.get();
-                        Toast.makeText(ctx, "Could not send", Toast.LENGTH_LONG);
-                    }
-                    break;
-                }
-                case MSG_SEND_BROADCAST: {
-                    Serializable data = msg.getData().getSerializable(DATA_FIELD_IDENTITY);
-                    if (data instanceof BitmessageAddress) {
-                        String subject = msg.getData().getString(DATA_FIELD_SUBJECT);
-                        String message = msg.getData().getString(DATA_FIELD_MESSAGE);
-                        bmc.broadcast((BitmessageAddress) data, subject, message);
-                    }
-                    break;
-                }
-                case MSG_START_NODE:
-                    // TODO: warn user, option to restrict to WiFi
-                    // (I'm not quite sure this can be done here, though)
-                    service.get().startService(new Intent(service.get(), BitmessageService.class));
-                    running = true;
-                    service.get().startForeground(ONGOING_NOTIFICATION_ID, notification
-                            .getNotification());
-                    if (!bmc.isRunning()) {
-                        bmc.startup();
-                    }
-                    notification.show();
-                    break;
-                case MSG_STOP_NODE:
-                    if (bmc.isRunning()) {
-                        bmc.shutdown();
-                    }
-                    running = false;
-                    service.get().stopForeground(false);
-                    service.get().stopSelf();
-                    break;
-                default:
-                    super.handleMessage(msg);
+        public void shutdownNode() {
+            if (bmc.isRunning()) {
+                bmc.shutdown();
             }
+            running = false;
+            stopForeground(false);
+            stopSelf();
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/ch/dissem/apps/abit/service/ProofOfWorkService.java b/app/src/main/java/ch/dissem/apps/abit/service/ProofOfWorkService.java
index 7cb7087..94b5620 100644
--- a/app/src/main/java/ch/dissem/apps/abit/service/ProofOfWorkService.java
+++ b/app/src/main/java/ch/dissem/apps/abit/service/ProofOfWorkService.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.service;
 
 import android.app.Service;
diff --git a/app/src/main/java/ch/dissem/apps/abit/service/ServicePowEngine.java b/app/src/main/java/ch/dissem/apps/abit/service/ServicePowEngine.java
index eaffbdf..f986a7f 100644
--- a/app/src/main/java/ch/dissem/apps/abit/service/ServicePowEngine.java
+++ b/app/src/main/java/ch/dissem/apps/abit/service/ServicePowEngine.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.service;
 
 import android.content.ComponentName;
diff --git a/app/src/main/java/ch/dissem/apps/abit/service/Singleton.java b/app/src/main/java/ch/dissem/apps/abit/service/Singleton.java
index 50c95da..5313927 100644
--- a/app/src/main/java/ch/dissem/apps/abit/service/Singleton.java
+++ b/app/src/main/java/ch/dissem/apps/abit/service/Singleton.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.service;
 
 import android.content.Context;
diff --git a/app/src/main/java/ch/dissem/apps/abit/synchronization/Authenticator.java b/app/src/main/java/ch/dissem/apps/abit/synchronization/Authenticator.java
index 009b35d..a9f2dd2 100644
--- a/app/src/main/java/ch/dissem/apps/abit/synchronization/Authenticator.java
+++ b/app/src/main/java/ch/dissem/apps/abit/synchronization/Authenticator.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.synchronization;
 
 import android.accounts.AbstractAccountAuthenticator;
diff --git a/app/src/main/java/ch/dissem/apps/abit/synchronization/AuthenticatorService.java b/app/src/main/java/ch/dissem/apps/abit/synchronization/AuthenticatorService.java
index 8fe717d..1534e33 100644
--- a/app/src/main/java/ch/dissem/apps/abit/synchronization/AuthenticatorService.java
+++ b/app/src/main/java/ch/dissem/apps/abit/synchronization/AuthenticatorService.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.synchronization;
 
 import android.app.Service;
diff --git a/app/src/main/java/ch/dissem/apps/abit/synchronization/StubProvider.java b/app/src/main/java/ch/dissem/apps/abit/synchronization/StubProvider.java
index f5b3d2d..1ac156e 100644
--- a/app/src/main/java/ch/dissem/apps/abit/synchronization/StubProvider.java
+++ b/app/src/main/java/ch/dissem/apps/abit/synchronization/StubProvider.java
@@ -1,9 +1,26 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.synchronization;
 
 import android.content.ContentProvider;
 import android.content.ContentValues;
 import android.database.Cursor;
 import android.net.Uri;
+import android.support.annotation.NonNull;
 
 /*
  * Define an implementation of ContentProvider that stubs out
@@ -25,7 +42,7 @@ public class StubProvider extends ContentProvider {
      * Return no type for MIME type
      */
     @Override
-    public String getType(Uri uri) {
+    public String getType(@NonNull Uri uri) {
         return null;
     }
 
@@ -35,7 +52,7 @@ public class StubProvider extends ContentProvider {
      */
     @Override
     public Cursor query(
-            Uri uri,
+            @NonNull Uri uri,
             String[] projection,
             String selection,
             String[] selectionArgs,
@@ -47,7 +64,7 @@ public class StubProvider extends ContentProvider {
      * insert() always returns null (no URI)
      */
     @Override
-    public Uri insert(Uri uri, ContentValues values) {
+    public Uri insert(@NonNull Uri uri, ContentValues values) {
         return null;
     }
 
@@ -55,7 +72,7 @@ public class StubProvider extends ContentProvider {
      * delete() always returns "no rows affected" (0)
      */
     @Override
-    public int delete(Uri uri, String selection, String[] selectionArgs) {
+    public int delete(@NonNull Uri uri, String selection, String[] selectionArgs) {
         return 0;
     }
 
@@ -63,7 +80,7 @@ public class StubProvider extends ContentProvider {
      * update() always returns "no rows affected" (0)
      */
     public int update(
-            Uri uri,
+            @NonNull Uri uri,
             ContentValues values,
             String selection,
             String[] selectionArgs) {
diff --git a/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncAdapter.java b/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncAdapter.java
index 7655044..0177f37 100644
--- a/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncAdapter.java
+++ b/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncAdapter.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.synchronization;
 
 import android.accounts.Account;
diff --git a/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncService.java b/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncService.java
index 1f92159..a11b120 100644
--- a/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncService.java
+++ b/app/src/main/java/ch/dissem/apps/abit/synchronization/SyncService.java
@@ -1,19 +1,31 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.synchronization;
 
 import android.app.Service;
 import android.content.Intent;
 import android.os.IBinder;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 /**
  * Define a Service that returns an IBinder for the
  * sync adapter class, allowing the sync adapter framework to call
  * onPerformSync().
  */
 public class SyncService extends Service {
-    private static final Logger LOG = LoggerFactory.getLogger(SyncService.class);
     // Storage for an instance of the sync adapter
     private static SyncAdapter syncAdapter = null;
     // Object to use as a thread-safe lock
diff --git a/app/src/main/java/ch/dissem/apps/abit/util/Assets.java b/app/src/main/java/ch/dissem/apps/abit/util/Assets.java
index e3e2dc6..db9b54c 100644
--- a/app/src/main/java/ch/dissem/apps/abit/util/Assets.java
+++ b/app/src/main/java/ch/dissem/apps/abit/util/Assets.java
@@ -28,15 +28,6 @@ import java.util.Scanner;
  * Helper class to work with Assets.
  */
 public class Assets {
-    public static String readToString(Context ctx, String name) {
-        try {
-            InputStream in = ctx.getAssets().open(name);
-            return new Scanner(in, "UTF-8").useDelimiter("\\A").next();
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
     public static List<String> readSqlStatements(Context ctx, String name) {
         try {
             InputStream in = ctx.getAssets().open(name);
diff --git a/app/src/main/java/ch/dissem/apps/abit/util/Constants.java b/app/src/main/java/ch/dissem/apps/abit/util/Constants.java
index 20fcbee..bd1817d 100644
--- a/app/src/main/java/ch/dissem/apps/abit/util/Constants.java
+++ b/app/src/main/java/ch/dissem/apps/abit/util/Constants.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.util;
 
 import java.util.regex.Pattern;
diff --git a/app/src/main/java/ch/dissem/apps/abit/util/Drawables.java b/app/src/main/java/ch/dissem/apps/abit/util/Drawables.java
index e392e36..1583a1c 100644
--- a/app/src/main/java/ch/dissem/apps/abit/util/Drawables.java
+++ b/app/src/main/java/ch/dissem/apps/abit/util/Drawables.java
@@ -32,7 +32,7 @@ import com.mikepenz.iconics.IconicsDrawable;
  */
 public class Drawables {
     public static void addIcon(Context ctx, Menu menu, int menuItem, GoogleMaterial.Icon icon) {
-        menu.findItem(menuItem).setIcon(new IconicsDrawable(ctx, icon).colorRes(R.color.primary_text_default_material_dark).actionBar());
+        menu.findItem(menuItem).setIcon(new IconicsDrawable(ctx, icon).colorRes(R.color.colorPrimaryDarkText).actionBar());
     }
 
     public static Bitmap toBitmap(Identicon identicon, int size) {
diff --git a/app/src/main/java/ch/dissem/apps/abit/util/PRNGFixes.java b/app/src/main/java/ch/dissem/apps/abit/util/PRNGFixes.java
index a17d0a2..47fef8b 100644
--- a/app/src/main/java/ch/dissem/apps/abit/util/PRNGFixes.java
+++ b/app/src/main/java/ch/dissem/apps/abit/util/PRNGFixes.java
@@ -1,4 +1,3 @@
-package ch.dissem.apps.abit.util;
 /*
  * This software is provided 'as-is', without any express or implied
  * warranty.  In no event will Google be held liable for any damages
@@ -9,6 +8,8 @@ package ch.dissem.apps.abit.util;
  * freely, as long as the origin is not misrepresented.
  */
 
+package ch.dissem.apps.abit.util;
+
 import android.os.Build;
 import android.os.Process;
 import android.util.Log;
@@ -78,7 +79,7 @@ public final class PRNGFixes {
             // Mix in the device- and invocation-specific seed.
             Class.forName("org.apache.harmony.xnet.provider.jsse.NativeCrypto")
                     .getMethod("RAND_seed", byte[].class)
-                    .invoke(null, generateSeed());
+                    .invoke(null, (Object) generateSeed());
 
             // Mix output of Linux PRNG into OpenSSL's PRNG
             int bytesRead = (Integer) Class.forName(
@@ -169,6 +170,7 @@ public final class PRNGFixes {
      * {@link SecureRandomSpi} which passes all requests to the Linux PRNG
      * ({@code /dev/urandom}).
      */
+    @SuppressWarnings("JavaDoc")
     public static class LinuxPRNGSecureRandom extends SecureRandomSpi {
 
         /*
@@ -241,6 +243,7 @@ public final class PRNGFixes {
                 synchronized (sLock) {
                     in = getUrandomInputStream();
                 }
+                //noinspection SynchronizationOnLocalVariableOrMethodParameter
                 synchronized (in) {
                     in.readFully(bytes);
                 }
diff --git a/app/src/main/java/ch/dissem/apps/abit/util/Preferences.java b/app/src/main/java/ch/dissem/apps/abit/util/Preferences.java
index df5b1c7..7f67191 100644
--- a/app/src/main/java/ch/dissem/apps/abit/util/Preferences.java
+++ b/app/src/main/java/ch/dissem/apps/abit/util/Preferences.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2016 Christian Basler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package ch.dissem.apps.abit.util;
 
 import android.content.Context;
diff --git a/app/src/main/res/layout-w720dp/activity_message_list.xml b/app/src/main/res/layout-w720dp/activity_message_list.xml
index e955b6b..8ad5fef 100644
--- a/app/src/main/res/layout-w720dp/activity_message_list.xml
+++ b/app/src/main/res/layout-w720dp/activity_message_list.xml
@@ -1,5 +1,6 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 xmlns:app="http://schemas.android.com/apk/res-auto"
+                xmlns:tools="http://schemas.android.com/tools"
                 android:gravity="center"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent">
@@ -11,7 +12,8 @@
             android:background="?attr/colorPrimary"
             android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
             app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
-            android:elevation="4dp" />
+            android:elevation="4dp"
+            tools:ignore="UnusedAttribute"/>
 
     <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
                   xmlns:tools="http://schemas.android.com/tools"
diff --git a/app/src/main/res/layout/activity_message_list.xml b/app/src/main/res/layout/activity_message_list.xml
index bb2d440..c30b4cd 100644
--- a/app/src/main/res/layout/activity_message_list.xml
+++ b/app/src/main/res/layout/activity_message_list.xml
@@ -1,5 +1,6 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 xmlns:app="http://schemas.android.com/apk/res-auto"
+                xmlns:tools="http://schemas.android.com/tools"
                 android:gravity="center"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent">
@@ -11,7 +12,8 @@
             android:background="?attr/colorPrimary"
             android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
             app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
-            android:elevation="4dp" />
+            android:elevation="4dp"
+            tools:ignore="UnusedAttribute"/>
 
     <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
               xmlns:tools="http://schemas.android.com/tools"
diff --git a/app/src/main/res/layout/activity_open_bitmessage_link.xml b/app/src/main/res/layout/activity_open_bitmessage_link.xml
index 295dc87..b0aed01 100644
--- a/app/src/main/res/layout/activity_open_bitmessage_link.xml
+++ b/app/src/main/res/layout/activity_open_bitmessage_link.xml
@@ -9,9 +9,8 @@
         android:id="@+id/address"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignParentLeft="true"
         android:layout_alignParentStart="true"
-        android:text="BM-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
+        tools:text="BM-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
         android:textSize="10dp"
         tools:ignore="SpUsage" />
 
@@ -19,7 +18,6 @@
         android:id="@+id/label_wrapper"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignLeft="@+id/address"
         android:layout_alignStart="@+id/address"
         android:layout_below="@+id/address"
         android:layout_marginTop="16dp">
@@ -37,7 +35,6 @@
         android:id="@+id/subscribe"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_alignLeft="@+id/address"
         android:layout_alignStart="@+id/address"
         android:layout_below="@+id/label_wrapper"
         android:layout_marginBottom="8dp"
@@ -50,7 +47,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentEnd="true"
-        android:layout_alignParentRight="true"
         android:layout_below="@+id/subscribe"
         android:layout_marginBottom="12dp"
         android:layout_marginTop="12dp"
@@ -62,7 +58,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignTop="@+id/do_import"
-        android:layout_toLeftOf="@+id/do_import"
         android:layout_toStartOf="@+id/do_import"
         android:text="@string/cancel" />
 
diff --git a/app/src/main/res/layout/activity_status.xml b/app/src/main/res/layout/activity_status.xml
index 2e8d317..6eeca86 100644
--- a/app/src/main/res/layout/activity_status.xml
+++ b/app/src/main/res/layout/activity_status.xml
@@ -33,7 +33,8 @@
             android:title="@string/status"
             app:title="@string/status"
             app:layout_scrollFlags="scroll|enterAlways"
-            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
+            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
+            tools:ignore="UnusedAttribute"/>
 
     </android.support.design.widget.AppBarLayout>
 
diff --git a/app/src/main/res/layout/contact_row.xml b/app/src/main/res/layout/contact_row.xml
index 0f6ad65..c6afc0f 100644
--- a/app/src/main/res/layout/contact_row.xml
+++ b/app/src/main/res/layout/contact_row.xml
@@ -16,7 +16,7 @@
   -->
 
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-                xmlns:app="http://schemas.android.com/apk/res-auto"
+                xmlns:tools="http://schemas.android.com/tools"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content">
 
@@ -25,41 +25,38 @@
             android:layout_width="40dp"
             android:layout_height="40dp"
             android:layout_alignParentTop="true"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:src="@color/colorAccent"
-            android:layout_margin="16dp"/>
+            android:layout_margin="16dp"
+            tools:ignore="ContentDescription"/>
 
     <TextView
             android:id="@+id/name"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Name"
+            tools:text="Name"
             android:lines="1"
             android:ellipsize="end"
             android:textAppearance="?android:attr/textAppearanceMedium"
             android:layout_alignTop="@+id/avatar"
-            android:layout_toRightOf="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"
             android:paddingTop="0dp"
             android:paddingLeft="8dp"
             android:paddingRight="8dp"
             android:paddingBottom="0dp"
-            android:textStyle="bold"
-            />
+            android:textStyle="bold"/>
 
     <TextView
             android:id="@+id/address"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="BM-2cW0000000000000000000000000000000"
+            tools:text="BM-2cW0000000000000000000000000000000"
             android:lines="1"
             android:ellipsize="marquee"
             android:textAppearance="?android:attr/textAppearanceSmall"
             android:paddingLeft="8dp"
             android:paddingRight="8dp"
             android:layout_alignBottom="@+id/avatar"
-            android:layout_toRightOf="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"/>
 
 </RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_contact_detail.xml b/app/src/main/res/layout/fragment_contact_detail.xml
index f8b4bda..662890d 100644
--- a/app/src/main/res/layout/fragment_contact_detail.xml
+++ b/app/src/main/res/layout/fragment_contact_detail.xml
@@ -50,10 +50,9 @@
         android:lines="1"
         android:paddingLeft="16dp"
         android:paddingRight="16dp"
-        android:text="BM-XyYxXyYxXyYxXyYxXyYx"
+        tools:text="BM-XyYxXyYxXyYxXyYxXyYx"
         android:textAppearance="?android:attr/textAppearanceSmall"
-        android:textStyle="bold"
-        tools:ignore="HardcodedText"/>
+        android:textStyle="bold"/>
 
     <TextView
         android:id="@+id/stream_number"
@@ -64,9 +63,8 @@
         android:lines="1"
         android:paddingLeft="16dp"
         android:paddingRight="16dp"
-        android:text="Stream #"
-        android:textAppearance="?android:attr/textAppearanceSmall"
-        tools:ignore="HardcodedText"/>
+        tools:text="Stream #"
+        android:textAppearance="?android:attr/textAppearanceSmall"/>
 
     <Switch
         android:id="@+id/active"
diff --git a/app/src/main/res/layout/fragment_contact_list.xml b/app/src/main/res/layout/fragment_contact_list.xml
index ba540ad..5aa714b 100644
--- a/app/src/main/res/layout/fragment_contact_list.xml
+++ b/app/src/main/res/layout/fragment_contact_list.xml
@@ -14,7 +14,6 @@
             android:scrollbarStyle="outsideOverlay"
 
             android:layout_alignParentTop="true"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:layout_alignParentBottom="true"/>
 
@@ -26,6 +25,5 @@
             app:elevation="8dp"
             android:layout_alignParentBottom="true"
             android:layout_alignParentEnd="true"
-            android:layout_alignParentRight="true"
             android:layout_margin="16dp"/>
 </RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_message_detail.xml b/app/src/main/res/layout/fragment_message_detail.xml
index 044dd43..053a8d4 100644
--- a/app/src/main/res/layout/fragment_message_detail.xml
+++ b/app/src/main/res/layout/fragment_message_detail.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
+            xmlns:tools="http://schemas.android.com/tools"
+            android:layout_width="match_parent"
     android:layout_height="match_parent">
 
     <RelativeLayout
@@ -13,15 +14,15 @@
             android:id="@+id/subject"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:layout_alignParentTop="true"
             android:elegantTextHeight="false"
             android:enabled="false"
             android:gravity="center_vertical"
             android:padding="16dp"
-            android:text="Subject"
-            android:textAppearance="?android:attr/textAppearanceLarge" />
+            tools:text="Subject"
+            android:textAppearance="?android:attr/textAppearanceLarge"
+            tools:ignore="UnusedAttribute"/>
 
         <View
             android:id="@+id/divider"
@@ -34,11 +35,11 @@
             android:id="@+id/avatar"
             android:layout_width="40dp"
             android:layout_height="40dp"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:layout_below="@+id/divider"
             android:layout_margin="16dp"
-            android:src="@color/colorAccent" />
+            android:src="@color/colorAccent"
+            tools:ignore="ContentDescription"/>
 
         <TextView
             android:id="@+id/sender"
@@ -46,11 +47,10 @@
             android:layout_height="20dp"
             android:layout_alignTop="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"
-            android:layout_toRightOf="@+id/avatar"
             android:gravity="center_vertical"
             android:paddingLeft="8dp"
             android:paddingRight="8dp"
-            android:text="Sender"
+            tools:text="Sender"
             android:textStyle="bold" />
 
         <TextView
@@ -59,17 +59,15 @@
             android:layout_height="20dp"
             android:layout_alignBottom="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"
-            android:layout_toRightOf="@+id/avatar"
             android:gravity="center_vertical"
             android:paddingLeft="8dp"
             android:paddingRight="8dp"
-            android:text="Recipient" />
+            tools:text="Recipient" />
 
         <TextView
             android:id="@+id/text"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:layout_below="@+id/avatar"
             android:layout_marginLeft="16dp"
diff --git a/app/src/main/res/layout/fragment_message_list.xml b/app/src/main/res/layout/fragment_message_list.xml
index ba540ad..5aa714b 100644
--- a/app/src/main/res/layout/fragment_message_list.xml
+++ b/app/src/main/res/layout/fragment_message_list.xml
@@ -14,7 +14,6 @@
             android:scrollbarStyle="outsideOverlay"
 
             android:layout_alignParentTop="true"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:layout_alignParentBottom="true"/>
 
@@ -26,6 +25,5 @@
             app:elevation="8dp"
             android:layout_alignParentBottom="true"
             android:layout_alignParentEnd="true"
-            android:layout_alignParentRight="true"
             android:layout_margin="16dp"/>
 </RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/message_row.xml b/app/src/main/res/layout/message_row.xml
index c3d4f2a..b80d6f1 100644
--- a/app/src/main/res/layout/message_row.xml
+++ b/app/src/main/res/layout/message_row.xml
@@ -16,6 +16,7 @@
   -->
 
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                xmlns:tools="http://schemas.android.com/tools"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content">
     <ImageView
@@ -23,21 +24,20 @@
             android:layout_width="40dp"
             android:layout_height="40dp"
             android:layout_alignParentTop="true"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:src="@color/colorAccent"
-            android:layout_margin="16dp"/>
+            android:layout_margin="16dp"
+            tools:ignore="ContentDescription"/>
 
     <TextView
             android:id="@+id/sender"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Sender"
+            tools:text="Sender"
             android:lines="1"
             android:ellipsize="end"
             android:textAppearance="?android:attr/textAppearanceMedium"
             android:layout_alignTop="@+id/avatar"
-            android:layout_toRightOf="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"
             android:layout_marginTop="-5dp"
             android:paddingTop="0dp"
@@ -51,21 +51,20 @@
             android:id="@+id/subject"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Subject"
+            tools:text="Subject"
             android:lines="1"
             android:ellipsize="end"
             android:textAppearance="?android:attr/textAppearanceSmall"
             android:paddingLeft="8dp"
             android:paddingRight="8dp"
             android:layout_below="@+id/sender"
-            android:layout_toRightOf="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"/>
 
     <TextView
             android:id="@+id/text"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Text"
+            tools:text="Text"
             android:lines="1"
             android:ellipsize="end"
             android:textAppearance="?android:attr/textAppearanceSmall"
@@ -74,7 +73,6 @@
             android:paddingRight="8dp"
             android:paddingBottom="8dp"
             android:layout_below="@+id/subject"
-            android:layout_toRightOf="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"/>
 
 </RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/subscription_row.xml b/app/src/main/res/layout/subscription_row.xml
index 359edce..70ee7a6 100644
--- a/app/src/main/res/layout/subscription_row.xml
+++ b/app/src/main/res/layout/subscription_row.xml
@@ -17,6 +17,7 @@
 
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 xmlns:app="http://schemas.android.com/apk/res-auto"
+                xmlns:tools="http://schemas.android.com/tools"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content">
 
@@ -25,21 +26,20 @@
             android:layout_width="40dp"
             android:layout_height="40dp"
             android:layout_alignParentTop="true"
-            android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
             android:src="@color/colorAccent"
-            android:layout_margin="16dp"/>
+            android:layout_margin="16dp"
+            tools:ignore="ContentDescription"/>
 
     <TextView
             android:id="@+id/name"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Name"
+            tools:text="Name"
             android:lines="1"
             android:ellipsize="end"
             android:textAppearance="?android:attr/textAppearanceMedium"
             android:layout_alignTop="@+id/avatar"
-            android:layout_toRightOf="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"
             android:paddingTop="0dp"
             android:paddingLeft="8dp"
@@ -52,14 +52,13 @@
             android:id="@+id/stream_number"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="Stream #"
+            tools:text="Stream #"
             android:lines="1"
             android:ellipsize="end"
             android:textAppearance="?android:attr/textAppearanceSmall"
             android:paddingLeft="8dp"
             android:paddingRight="8dp"
             android:layout_alignBottom="@+id/avatar"
-            android:layout_toRightOf="@+id/avatar"
             android:layout_toEndOf="@+id/avatar"/>
 
     <com.mikepenz.iconics.view.IconicsImageView
@@ -69,8 +68,7 @@
             app:iiv_color="@android:color/black"
             app:iiv_icon="cmd-rss"
             android:layout_alignParentEnd="true"
-            android:layout_alignParentRight="true"
             android:layout_centerVertical="true"
-            android:layout_marginRight="16dp"/>
+            android:layout_marginEnd="16dp"/>
 
 </RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/toolbar_layout.xml b/app/src/main/res/layout/toolbar_layout.xml
index ade8b53..ab60f4a 100644
--- a/app/src/main/res/layout/toolbar_layout.xml
+++ b/app/src/main/res/layout/toolbar_layout.xml
@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:layout_width="match_parent"
+                                                 xmlns:tools="http://schemas.android.com/tools"
+                                                 android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fitsSystemWindows="true">
 
@@ -27,7 +28,8 @@
             android:elevation="4dp"
             android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
             app:layout_scrollFlags="scroll|enterAlways"
-            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
+            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
+            tools:ignore="UnusedAttribute"/>
 
     </android.support.design.widget.AppBarLayout>
 
diff --git a/app/src/main/res/menu/compose.xml b/app/src/main/res/menu/compose.xml
index dae8007..922a705 100644
--- a/app/src/main/res/menu/compose.xml
+++ b/app/src/main/res/menu/compose.xml
@@ -5,5 +5,5 @@
             android:id="@+id/send"
             app:showAsAction="always"
             android:icon="@drawable/ic_action_send"
-            android:title="@string/send"/>`
+            android:title="@string/send"/>
 </menu>
\ No newline at end of file
diff --git a/app/src/main/res/menu/main.xml b/app/src/main/res/menu/main.xml
deleted file mode 100644
index 9eb7100..0000000
--- a/app/src/main/res/menu/main.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
-      xmlns:app="http://schemas.android.com/apk/res-auto">
-</menu>
\ No newline at end of file
diff --git a/app/src/main/res/values/library_jabit_strings.xml b/app/src/main/res/values/library_jabit_strings.xml
index 4bd1769..356e88d 100644
--- a/app/src/main/res/values/library_jabit_strings.xml
+++ b/app/src/main/res/values/library_jabit_strings.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="define_jabit" translatable="false"></string>
+    <string name="define_jabit" translatable="false"/>
     <!-- Author section -->
     <string name="library_jabit_author" translatable="false">Christian Basler</string>
     <string name="library_jabit_authorWebsite" translatable="false">dissem.ch</string>