Reset bound message ID when view is recycled.

briar-android/src/main/java/org/briarproject/briar/android/threaded/BaseThreadItemViewHolder.java

@@ -121,4 +121,9 @@ public abstract class BaseThreadItemViewHolder<I extends ThreadItem>
 		return textView.getContext();
 	}
 
+	void onViewRecycled() {
+		// Reset the bound message ID so an asynchronous text loading task
+		// won't set the view's text while it's in the recycling pool
+		boundMessageId = null;
+	}
 }

briar-android/src/main/java/org/briarproject/briar/android/threaded/ThreadItemAdapter.java

@@ -140,6 +140,12 @@ public class ThreadItemAdapter<I extends ThreadItem>
 		return getItem(position);
 	}
 
+	@Override
+	public void onViewRecycled(BaseThreadItemViewHolder<I> viewHolder) {
+		super.onViewRecycled(viewHolder);
+		viewHolder.onViewRecycled();
+	}
+
 	public interface ThreadItemListener<I> {
 
 		void onReplyClick(I item);