Notifications could still use some fine tuning, but should work fine for now

app/src/main/AndroidManifest.xml

@@ -6,6 +6,8 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.READ_CONTACTS"/>
+    <uses-permission android:name="android.permission.WRITE_CONTACTS"/>
 
     <application
             android:allowBackup="true"

app/src/main/java/ch/dissem/apps/abit/Identicon.java

@@ -29,6 +29,9 @@ public class Identicon extends Drawable {
     private static final int CENTER_COLUMN = 5;
 
     private final Paint paint;
+    private float width;
+    private float height;
+
     private float cellWidth;
     private float cellHeight;
     private byte[] hash;
@@ -54,15 +57,11 @@ public class Identicon extends Drawable {
         }
     }
 
-    protected byte getByte(int index) {
-        return hash[index % hash.length];
-    }
-
     @Override
     public void draw(Canvas canvas) {
         float x, y;
         paint.setColor(background);
-        canvas.drawPaint(paint);
+        canvas.drawCircle(width/2, height/2, width/2, paint);
         paint.setColor(color);
         for (int row = 0; row < SIZE; row++) {
             for (int column = 0; column < SIZE; column++) {
@@ -88,13 +87,16 @@ public class Identicon extends Drawable {
 
     @Override
     public int getOpacity() {
-        return PixelFormat.OPAQUE;
+        return PixelFormat.TRANSPARENT;
     }
 
     @Override
     protected void onBoundsChange(Rect bounds) {
         super.onBoundsChange(bounds);
 
+        width = bounds.width();
+        height = bounds.height();
+
         cellWidth = bounds.width() / (float) SIZE;
         cellHeight = bounds.height() / (float) SIZE;
     }

app/src/main/java/ch/dissem/apps/abit/MessageListActivity.java

@@ -52,7 +52,8 @@ import java.util.ArrayList;
  */
 public class MessageListActivity extends AppCompatActivity
         implements MessageListFragment.Callbacks {
-    public static final String EXTRA_SHOW_MESSAGE = "show_message";
+    public static final String EXTRA_SHOW_MESSAGE = "ch.dissem.abit.ShowMessage";
+    public static final String ACTION_SHOW_INBOX = "ch.dissem.abit.ShowInbox";
 
     private static final Logger LOG = LoggerFactory.getLogger(MessageListActivity.class);
     private static final int ADD_IDENTITY = 1;
@@ -95,7 +96,12 @@ public class MessageListActivity extends AppCompatActivity
 
         createDrawer(toolbar);
 
-        // TODO: If exposing deep links into your app, handle intents here.
+        Singleton.getMessageListener(this).resetNotification();
+
+        // handle intents
+        if (getIntent().hasExtra(EXTRA_SHOW_MESSAGE)) {
+            onItemSelected((Plaintext) getIntent().getSerializableExtra(EXTRA_SHOW_MESSAGE));
+        }
     }
 
     private void createDrawer(Toolbar toolbar) {
@@ -103,6 +109,7 @@ public class MessageListActivity extends AppCompatActivity
         for (BitmessageAddress identity : bmc.addresses().getIdentities()) {
             LOG.info("Adding identity " + identity.getAddress());
             profiles.add(new ProfileDrawerItem()
+                            .withIcon(new Identicon(identity))
                             .withName(identity.toString())
                             .withEmail(identity.getAddress())
                             .withTag(identity)
@@ -173,6 +180,7 @@ public class MessageListActivity extends AppCompatActivity
                             selectedLabel = (Label) item.getTag();
                             ((MessageListFragment) getSupportFragmentManager()
                                     .findFragmentById(R.id.message_list)).updateList(selectedLabel);
+                            return true;
                         } else if (item instanceof Nameable<?>) {
                             Nameable<?> ni = (Nameable<?>) item;
                             switch (ni.getNameRes()) {
@@ -237,7 +245,6 @@ public class MessageListActivity extends AppCompatActivity
             getSupportFragmentManager().beginTransaction()
                     .replace(R.id.message_detail_container, fragment)
                     .commit();
-
         } else {
             // In single-pane mode, simply start the detail activity
             // for the selected item ID.

app/src/main/java/ch/dissem/apps/abit/MessageListFragment.java

@@ -82,6 +82,11 @@ public class MessageListFragment extends ListFragment {
         super.onCreate(savedInstanceState);
 
         bmc = Singleton.getBitmessageContext(getActivity());
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
 
         updateList(((MessageListActivity) getActivity()).getSelectedLabel());
     }

app/src/main/java/ch/dissem/apps/abit/MessageListener.java

@@ -16,54 +16,134 @@
 
 package ch.dissem.apps.abit;
 
+import android.annotation.TargetApi;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Typeface;
+import android.net.Uri;
+import android.os.Build;
+import android.provider.ContactsContract;
 import android.support.v7.app.NotificationCompat;
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.text.Spanned;
+import android.text.style.StyleSpan;
 import ch.dissem.bitmessage.BitmessageContext;
 import ch.dissem.bitmessage.entity.Plaintext;
 
+import java.util.LinkedList;
+
 /**
- * Created by chris on 22.08.15.
+ * 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,
+ * notifications should be combined.
+ * </p>
  */
 public class MessageListener implements BitmessageContext.Listener {
+    private static final StyleSpan SPAN_EMPHASIS = new StyleSpan(Typeface.BOLD);
     private final Context ctx;
     private final NotificationManager manager;
+    private final LinkedList<Plaintext> unacknowledged = new LinkedList<>();
+    private final int pictureSize;
+    private int numberOfUnacknowledgedMessages = 0;
 
     public MessageListener(Context ctx) {
         this.ctx = ctx.getApplicationContext();
         this.manager = (NotificationManager) ctx.getSystemService(Context.NOTIFICATION_SERVICE);
+
+        this.pictureSize = getMaxContactPhotoSize(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) {
-        // TODO
-//        ctx.runOnUiThread(new Runnable() {
-//            @Override
-//            public void run() {
+        synchronized (unacknowledged) {
+            unacknowledged.addFirst(plaintext);
+            numberOfUnacknowledgedMessages++;
+            if (unacknowledged.size() > 5) {
+                unacknowledged.removeLast();
+            }
+        }
+
         NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx);
+        if (numberOfUnacknowledgedMessages == 1) {
+            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())))
                     .setContentTitle(plaintext.getFrom().toString())
-                .setContentText(plaintext.getSubject());
+                    .setContentText(plaintext.getSubject())
+                    .setStyle(new NotificationCompat.BigTextStyle().bigText(bigText))
+                    .setContentInfo("Info");
+
+            Intent showMessageIntent = new Intent(ctx, MessageListActivity.class);
+            showMessageIntent.putExtra(MessageListActivity.EXTRA_SHOW_MESSAGE, plaintext);
+            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);
+        } else {
+            builder.setSmallIcon(R.drawable.ic_notification_new_message)
+                    .setContentTitle(ctx.getString(R.string.n_new_messages, this.unacknowledged.size()))
+                    .setContentText(ctx.getString(R.string.app_name));
 
             NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
-        inboxStyle.setBigContentTitle(plaintext.getFrom().toString());
-        inboxStyle.setSummaryText(plaintext.getSubject());
-        String text = plaintext.getText();
-        if (text.length() > 100)
-            inboxStyle.addLine(text.substring(0, 100) + "…");
-        else
-            inboxStyle.addLine(text);
+            synchronized (unacknowledged) {
+                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);
+                    inboxStyle.addLine(sb);
+                }
+            }
             builder.setStyle(inboxStyle);
 
             Intent intent = new Intent(ctx, MessageListActivity.class);
-        intent.putExtra(MessageListActivity.EXTRA_SHOW_MESSAGE, plaintext);
-        PendingIntent pendingIntent = PendingIntent.getActivity(ctx, 0, intent, 0);
+            intent.setAction(MessageListActivity.ACTION_SHOW_INBOX);
+            PendingIntent pendingIntent = PendingIntent.getActivity(ctx, 1, intent, 0);
             builder.setContentIntent(pendingIntent);
+        }
 
         manager.notify(0, builder.build());
-//            }
-//        });
+    }
+
+    private Bitmap toBitmap(Identicon identicon) {
+        Bitmap bitmap = Bitmap.createBitmap(pictureSize, pictureSize, Bitmap.Config.ARGB_8888);
+        Canvas canvas = new Canvas(bitmap);
+        identicon.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
+        identicon.draw(canvas);
+        return bitmap;
+    }
+
+    public void resetNotification() {
+        manager.cancel(0);
+        synchronized (unacknowledged) {
+            unacknowledged.clear();
+            numberOfUnacknowledgedMessages = 0;
+        }
     }
 }

app/src/main/java/ch/dissem/apps/abit/repositories/AndroidMessageRepository.java

@@ -19,6 +19,7 @@ package ch.dissem.apps.abit.repositories;
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
+import android.database.sqlite.SQLiteConstraintException;
 import android.database.sqlite.SQLiteDatabase;
 import ch.dissem.apps.abit.R;
 import ch.dissem.bitmessage.InternalContext;
@@ -151,6 +152,24 @@ public class AndroidMessageRepository implements MessageRepository, InternalCont
         return label;
     }
 
+    @Override
+    public int countUnread(Label label) {
+        String where;
+        if (label != null) {
+            where = "id IN (SELECT message_id FROM Message_Label WHERE label_id=" + label.getId() + ") AND ";
+        } else {
+            where = "";
+        }
+        SQLiteDatabase db = sql.getReadableDatabase();
+        Cursor c = db.query(
+                TABLE_NAME, new String[]{COLUMN_ID},
+                where + "id IN (SELECT message_id FROM Message_Label WHERE label_id IN (" +
+                        "SELECT id FROM Label WHERE type = '" + Label.Type.UNREAD.name() + "'))",
+                null, null, null, null
+        );
+        return c.getColumnCount();
+    }
+
     @Override
     public List<Plaintext> findMessages(Label label) {
         if (label != null) {
@@ -258,6 +277,8 @@ public class AndroidMessageRepository implements MessageRepository, InternalCont
                 db.insertOrThrow(JOIN_TABLE_NAME, null, values);
             }
             db.setTransactionSuccessful();
+        } catch (SQLiteConstraintException e) {
+            LOG.trace(e.getMessage(), e);
         } catch (IOException e) {
             LOG.error(e.getMessage(), e);
         } finally {

app/src/main/res/layout/fragment_message_list.xml

@@ -2,18 +2,21 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 xmlns:app="http://schemas.android.com/apk/res-auto"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                xmlns:fab="http://schemas.android.com/tools">
+                android:layout_height="match_parent">
 
     <ListView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:id="@id/android:list"
 
+            android:paddingBottom="88dp"
+            android:clipToPadding="false"
+            android:scrollbarStyle="outsideOverlay"
+
             android:layout_alignParentTop="true"
             android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true"
-            android:layout_alignParentBottom="true" />
+            android:layout_alignParentBottom="true"/>
 
     <android.support.design.widget.FloatingActionButton
             android:id="@+id/fab_compose_message"

app/src/main/res/values/strings.xml

@@ -24,4 +24,7 @@
     <string name="do_import">Import</string>
     <string name="cancel">Cancel</string>
     <string name="broadcast">Broadcast</string>
+    <string name="n_new_messages">%d new messages</string>
+    <string name="reply">Reply</string>
+    <string name="delete">Delete</string>
 </resources>