1 files changed, 98 insertions, 6 deletions

diff --git a/src/main/java/de/pixart/messenger/ui/ConferenceDetailsActivity.java b/src/main/java/de/pixart/messenger/ui/ConferenceDetailsActivity.java
index 3cd57864f..d9fe66975 100644
--- a/src/main/java/de/pixart/messenger/ui/ConferenceDetailsActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/ConferenceDetailsActivity.java
@@ -5,7 +5,12 @@ import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.IntentSender.SendIntentException;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
 import android.graphics.PorterDuff;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AlertDialog;
@@ -27,8 +32,10 @@ import android.widget.Toast;
 
 import org.openintents.openpgp.util.OpenPgpUtils;
 
+import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import de.pixart.messenger.Config;
@@ -43,6 +50,7 @@ import de.pixart.messenger.entities.MucOptions.User;
 import de.pixart.messenger.services.XmppConnectionService;
 import de.pixart.messenger.services.XmppConnectionService.OnConversationUpdate;
 import de.pixart.messenger.services.XmppConnectionService.OnMucRosterUpdate;
+import de.pixart.messenger.utils.UIHelper;
 import de.pixart.messenger.xmpp.jid.Jid;
 
 public class ConferenceDetailsActivity extends XmppActivity implements OnConversationUpdate, OnMucRosterUpdate, XmppConnectionService.OnAffiliationChanged, XmppConnectionService.OnRoleChanged, XmppConnectionService.OnConfigurationPushed {
@@ -703,7 +711,7 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 
             }
             ImageView iv = view.findViewById(R.id.contact_photo);
-            iv.setImageBitmap(avatarService().get(user, getPixel(48), false));
+            loadAvatar(user, iv);
             if (user.getRole() == MucOptions.Role.NONE) {
                 tvDisplayName.setAlpha(INACTIVE_ALPHA);
                 tvKey.setAlpha(INACTIVE_ALPHA);
@@ -773,11 +781,95 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
     }
 
     private void displayToast(final String msg) {
-        runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                Toast.makeText(ConferenceDetailsActivity.this, msg, Toast.LENGTH_SHORT).show();
+        runOnUiThread(() -> Toast.makeText(ConferenceDetailsActivity.this, msg, Toast.LENGTH_SHORT).show());
+    }
+
+    public static boolean cancelPotentialWork(User user, ImageView imageView) {
+        final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
+
+        if (bitmapWorkerTask != null) {
+            final User old = bitmapWorkerTask.o;
+            if (old == null || user != old) {
+                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;
+    }
+
+    public void loadAvatar(User user, ImageView imageView) {
+        if (cancelPotentialWork(user, imageView)) {
+            final Bitmap bm = avatarService().get(user, getPixel(48), true);
+            if (bm != null) {
+                cancelPotentialWork(user, imageView);
+                imageView.setImageBitmap(bm);
+                imageView.setBackgroundColor(0x00000000);
+            } else {
+                String seed = user.getRealJid() != null ? user.getRealJid().toBareJid().toString() : null;
+                imageView.setBackgroundColor(UIHelper.getColorForName(seed == null ? user.getName() : seed));
+                imageView.setImageDrawable(null);
+                final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
+                final AsyncDrawable asyncDrawable = new AsyncDrawable(getResources(), null, task);
+                imageView.setImageDrawable(asyncDrawable);
+                try {
+                    task.execute(user);
+                } catch (final RejectedExecutionException ignored) {
+                }
+            }
+        }
+    }
+
+    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();
+        }
+    }
+
+    class BitmapWorkerTask extends AsyncTask<User, Void, Bitmap> {
+        private final WeakReference<ImageView> imageViewReference;
+        private User o = null;
+
+        private BitmapWorkerTask(ImageView imageView) {
+            imageViewReference = new WeakReference<>(imageView);
+        }
+
+        @Override
+        protected Bitmap doInBackground(User... params) {
+            this.o = params[0];
+            if (imageViewReference.get() == null) {
+                return null;
             }
-        });
+            return avatarService().get(this.o, getPixel(48), isCancelled());
+        }
+
+        @Override
+        protected void onPostExecute(Bitmap bitmap) {
+            if (bitmap != null && !isCancelled()) {
+                final ImageView imageView = imageViewReference.get();
+                if (imageView != null) {
+                    imageView.setImageBitmap(bitmap);
+                    imageView.setBackgroundColor(0x00000000);
+                }
+            }
+        }
     }
 }