Add option to select identity when composing a message

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

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+  ~ Copyright 2015 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.
+  -->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content">
+
+    <ImageView
+        android:id="@+id/avatar"
+        android:layout_width="32dp"
+        android:layout_height="32dp"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentTop="true"
+        android:layout_margin="4dp"
+        android:src="@color/colorAccent"
+        tools:ignore="ContentDescription" />
+
+    <TextView
+        android:id="@+id/name"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerVertical="true"
+        android:layout_toEndOf="@+id/avatar"
+        android:ellipsize="end"
+        android:lines="1"
+        android:paddingBottom="0dp"
+        android:paddingEnd="4dp"
+        android:paddingStart="4dp"
+        android:paddingTop="0dp"
+        android:textAppearance="?android:attr/textAppearanceMedium"
+        tools:text="Name" />
+
+</RelativeLayout>

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

@@ -1,8 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-              android:layout_width="match_parent"
-              android:layout_height="match_parent"
-              android:orientation="vertical">
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:labelFor="@id/sender_input"
+        android:padding="4dp"
+        android:text="@string/from"
+        android:textColor="#9b9b9b"
+        android:textSize="12sp" />
+
+    <Spinner
+        android:id="@+id/sender_input"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
 
     <android.support.design.widget.TextInputLayout
         android:layout_width="match_parent"
@@ -15,7 +29,7 @@
             android:layout_height="wrap_content"
             android:hint="@string/to"
             android:inputType="textNoSuggestions"
-            android:maxLines="1"/>
+            android:maxLines="1" />
 
     </android.support.design.widget.TextInputLayout>
 
@@ -29,7 +43,7 @@
             android:layout_height="wrap_content"
             android:hint="@string/subject"
             android:inputType="textEmailSubject"
-            android:textAppearance="?android:attr/textAppearanceLarge"/>
+            android:textAppearance="?android:attr/textAppearanceLarge" />
 
     </android.support.design.widget.TextInputLayout>
 
@@ -41,6 +55,6 @@
         android:gravity="start|top"
         android:hint="@string/compose_body_hint"
         android:inputType="textMultiLine|textCapSentences"
-        android:scrollbars="vertical"/>
+        android:scrollbars="vertical" />
 
 </LinearLayout>