Merge tag '1.2.0' into trz/master

Conflicts:
	src/main/java/eu/siacs/conversations/parser/AbstractParser.java
	src/main/java/eu/siacs/conversations/ui/SettingsActivity.java
	src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
	src/main/res/values-de/strings.xml
	src/main/res/xml/preferences.xml

1 files changed, 92 insertions, 3 deletions

diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
index e62aaf96..c4a446e8 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/ConversationAdapter.java
@@ -1,8 +1,13 @@
 package eu.siacs.conversations.ui.adapter;
 
 import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.graphics.Typeface;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.AsyncTask;
 import android.util.Pair;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -11,14 +16,15 @@ import android.widget.ArrayAdapter;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import java.lang.ref.WeakReference;
 import java.util.List;
+import java.util.concurrent.RejectedExecutionException;
 
 import de.tzur.conversations.Settings;
 import eu.siacs.conversations.Config;
 import eu.siacs.conversations.R;
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Downloadable;
-import eu.siacs.conversations.entities.DownloadableFile;
 import eu.siacs.conversations.entities.Message;
 import eu.siacs.conversations.entities.Presences;
 import eu.siacs.conversations.ui.ConversationActivity;
@@ -132,8 +138,91 @@ public class ConversationAdapter extends ArrayAdapter<Conversation> {
 
 		mTimestamp.setText(UIHelper.readableTimeDifference(activity,conversation.getLatestMessage().getTimeSent()));
 		ImageView profilePicture = (ImageView) view.findViewById(R.id.conversation_image);
-		profilePicture.setImageBitmap(activity.avatarService().get(conversation, activity.getPixel(56)));
+		loadAvatar(conversation,profilePicture);
 
 		return view;
 	}
-}
+
+	class BitmapWorkerTask extends AsyncTask<Conversation, Void, Bitmap> {
+		private final WeakReference<ImageView> imageViewReference;
+		private Conversation conversation = null;
+
+		public BitmapWorkerTask(ImageView imageView) {
+			imageViewReference = new WeakReference<>(imageView);
+		}
+
+		@Override
+		protected Bitmap doInBackground(Conversation... params) {
+			return activity.avatarService().get(params[0], activity.getPixel(56));
+		}
+
+		@Override
+		protected void onPostExecute(Bitmap bitmap) {
+			if (bitmap != null) {
+				final ImageView imageView = imageViewReference.get();
+				if (imageView != null) {
+					imageView.setImageBitmap(bitmap);
+					imageView.setBackgroundColor(0x00000000);
+				}
+			}
+		}
+	}
+
+	public void loadAvatar(Conversation conversation, ImageView imageView) {
+		if (cancelPotentialWork(conversation, imageView)) {
+			final Bitmap bm = activity.avatarService().get(conversation, activity.getPixel(56), true);
+			if (bm != null) {
+				imageView.setImageBitmap(bm);
+				imageView.setBackgroundColor(0x00000000);
+			} else {
+				imageView.setBackgroundColor(UIHelper.getColorForName(conversation.getName()));
+				imageView.setImageDrawable(null);
+				final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
+				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
+				imageView.setImageDrawable(asyncDrawable);
+				try {
+					task.execute(conversation);
+				} catch (final RejectedExecutionException ignored) {
+				}
+			}
+		}
+	}
+
+	public static boolean cancelPotentialWork(Conversation conversation, ImageView imageView) {
+		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
+
+		if (bitmapWorkerTask != null) {
+			final Conversation oldConversation = bitmapWorkerTask.conversation;
+			if (oldConversation == null || conversation != oldConversation) {
+				bitmapWorkerTask.cancel(true);
+			} else {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
+		if (imageView != null) {
+			final Drawable drawable = imageView.getDrawable();
+			if (drawable instanceof AsyncDrawable) {
+				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
+				return asyncDrawable.getBitmapWorkerTask();
+			}
+		}
+		return null;
+	}
+
+	static class AsyncDrawable extends BitmapDrawable {
+		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
+
+		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
+			super(res, bitmap);
+			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
+		}
+
+		public BitmapWorkerTask getBitmapWorkerTask() {
+			return bitmapWorkerTaskReference.get();
+		}
+	}
+}
\ No newline at end of file