Bug 722413 - Use custom observer for BookmarksListAdapter. r=mfinkle f=lucasr

mobile/android/base/AwesomeBar.java

@@ -502,7 +502,6 @@ public class AwesomeBar extends Activity implements GeckoEventListener {
 
                         GeckoApp.mAppContext.mMainHandler.post(new Runnable() {
                             public void run() {
-                                mAwesomeTabs.refreshBookmarks();
                                 Toast.makeText(AwesomeBar.this, R.string.bookmark_removed,
                                         Toast.LENGTH_SHORT).show();
                             }

mobile/android/base/AwesomeBarTabs.java

@@ -40,6 +40,7 @@ package org.mozilla.gecko;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.res.Resources;
+import android.database.ContentObserver;
 import android.database.Cursor;
 import android.database.MatrixCursor;
 import android.graphics.Bitmap;
@@ -71,6 +72,7 @@ import android.widget.TextView;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
+import java.lang.reflect.Field;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.LinkedList;
@@ -100,6 +102,7 @@ public class AwesomeBarTabs extends TabHost {
     private View.OnTouchListener mListTouchListener;
     private JSONArray mSearchEngines;
     private ContentResolver mContentResolver;
+    private ContentObserver mContentObserver;
 
     private AwesomeBarCursorAdapter mAllPagesCursorAdapter;
     private BookmarksListAdapter mBookmarksAdapter;
@@ -247,18 +250,6 @@ public class AwesomeBarTabs extends TabHost {
         }
     }
 
-    // The group cursor doesn't ever need to change because it just holds the
-    // mobile/desktop folders, but we do need to update the children cursors.
-    public void refreshBookmarks() {
-        Cursor groupCursor = mBookmarksAdapter.getCursor();
-        groupCursor.moveToPosition(-1);
-        while (groupCursor.moveToNext()) {
-            String guid = groupCursor.getString(groupCursor.getColumnIndexOrThrow(Bookmarks.GUID));
-            // We need to do this in a AsyncTask because we're on the main thread
-            new RefreshChildrenCursorTask(groupCursor.getPosition()).execute(guid);
-        }
-    }
-
     private class BookmarksQueryTask extends AsyncTask<Void, Void, Cursor> {
         protected Cursor doInBackground(Void... arg0) {
             // Make our own cursor to group mobile bookmarks and desktop bookmarks.
@@ -291,6 +282,32 @@ public class AwesomeBarTabs extends TabHost {
                 new int[] { R.id.title, R.id.url, R.id.favicon }
             );
 
+            try {
+                // use reflection to disable auto-requery
+                Class cls = Class.forName("android.widget.CursorTreeAdapter"); 
+                Field field = cls.getDeclaredField("mAutoRequery");
+                field.setAccessible(true);
+                field.set(mBookmarksAdapter, false);
+
+                // register an asynchronous custom observer to replace the synchronous auto-requery
+                mContentObserver = new ContentObserver(GeckoAppShell.getHandler()) {
+                    public void onChange(boolean selfChange) {
+                        // The group cursor doesn't ever need to change because it just holds the
+                        // mobile/desktop folders, but we do need to update the children cursors.
+                        Cursor groupCursor = mBookmarksAdapter.getCursor();
+                        groupCursor.moveToPosition(-1);
+                        while (groupCursor.moveToNext()) {
+                            String guid = groupCursor.getString(groupCursor.getColumnIndexOrThrow(Bookmarks.GUID));
+                            // We need to do this in a AsyncTask because we're on the main thread
+                            new RefreshChildrenCursorTask(groupCursor.getPosition()).execute(guid);
+                        }
+                    }
+                };
+                BrowserDB.registerBookmarkObserver(mContentResolver, mContentObserver);
+            } catch (Exception e) {
+                Log.e(LOGTAG, "could not disable auto-requery for BookmarksListAdapter");
+            }
+
             mBookmarksAdapter.setViewBinder(new AwesomeCursorViewBinder());
 
             final ExpandableListView bookmarksList = (ExpandableListView) findViewById(R.id.bookmarks_list);
@@ -618,6 +635,7 @@ public class AwesomeBarTabs extends TabHost {
         mInflated = false;
         mSearchEngines = new JSONArray();
         mContentResolver = context.getContentResolver();
+        mContentObserver = null;
     }
 
     @Override
@@ -827,6 +845,9 @@ public class AwesomeBarTabs extends TabHost {
             if (bookmarksCursor != null)
                 bookmarksCursor.close();
         }
+
+        if (mContentObserver != null)
+            BrowserDB.unregisterBookmarkObserver(mContentResolver, mContentObserver);
     }
 
     public void filter(String searchTerm) {