Add forum avatars to list of available forums

Closes #374

briar-android/res/layout/list_item_available_forum.xml

@@ -9,10 +9,21 @@
 	android:paddingTop="@dimen/listitem_horizontal_margin"
 	android:background="?attr/selectableItemBackground">
 
+	<org.briarproject.android.util.TextAvatarView
+		android:id="@+id/avatarView"
+		android:layout_width="@dimen/avatar_forum_size"
+		android:layout_height="@dimen/avatar_forum_size"
+		android:layout_alignParentLeft="true"
+		android:layout_alignParentStart="true"
+		android:layout_marginRight="@dimen/listitem_horizontal_margin"
+		/>
+
 	<TextView
 		android:id="@+id/forumNameView"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
+		android:layout_toEndOf="@+id/avatarView"
+		android:layout_toRightOf="@+id/avatarView"
 		android:maxLines="2"
 		android:textColor="@android:color/primary_text_light"
 		android:textSize="@dimen/text_size_medium"
@@ -22,10 +33,10 @@
 		android:id="@+id/sharedByView"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
-		android:layout_alignParentLeft="true"
-		android:layout_alignParentStart="true"
 		android:layout_below="@+id/forumNameView"
 		android:layout_marginBottom="-8dp"
+		android:layout_toEndOf="@+id/avatarView"
+		android:layout_toRightOf="@+id/avatarView"
 		android:paddingTop="@dimen/margin_medium"
 		android:textColor="@android:color/secondary_text_light"
 		android:textSize="@dimen/text_size_small"

briar-android/src/org/briarproject/android/forum/AvailableForumsAdapter.java

@@ -10,6 +10,7 @@ import android.widget.Button;
 import android.widget.TextView;
 
 import org.briarproject.R;
+import org.briarproject.android.util.TextAvatarView;
 import org.briarproject.api.contact.Contact;
 import org.briarproject.util.StringUtils;
 
@@ -43,6 +44,9 @@ class AvailableForumsAdapter extends
 	public void onBindViewHolder(AvailableForumViewHolder ui, int position) {
 		final AvailableForumsItem item = getItem(position);
 
+		ui.avatar.setText(item.getForum().getName().substring(0, 1));
+		ui.avatar.setBackgroundBytes(item.getForum().getId().getBytes());
+
 		ui.name.setText(item.getForum().getName());
 
 		Collection<String> names = new ArrayList<>();
@@ -88,6 +92,7 @@ class AvailableForumsAdapter extends
 	protected static class AvailableForumViewHolder
 			extends RecyclerView.ViewHolder {
 
+		private final TextAvatarView avatar;
 		private final TextView name;
 		private final TextView sharedBy;
 		private final Button accept;
@@ -96,6 +101,7 @@ class AvailableForumsAdapter extends
 		public AvailableForumViewHolder(View v) {
 			super(v);
 
+			avatar = (TextAvatarView) v.findViewById(R.id.avatarView);
 			name = (TextView) v.findViewById(R.id.forumNameView);
 			sharedBy = (TextView) v.findViewById(R.id.sharedByView);
 			accept = (Button) v.findViewById(R.id.acceptButton);

briar-android/src/org/briarproject/android/forum/ForumListAdapter.java

@@ -91,7 +91,7 @@ public class ForumListAdapter extends
 	public void onBindViewHolder(ForumViewHolder ui, int position) {
 		final ForumListItem item = getItem(position);
 
-		// TODO add avatar. See #337
+		// Avatar
 		ui.avatar.setText(item.getForum().getName().substring(0, 1));
 		ui.avatar.setBackgroundBytes(item.getForum().getId().getBytes());