Email: check for closed cursor in onPostExecute for AsyncTasks.

BUG 2081965

src/com/android/email/activity/AccountFolderList.java

@@ -348,6 +348,9 @@ public class AccountFolderList extends ListActivity
 
         @Override
         protected void onPostExecute(Cursor[] cursors) {
+            if (cursors[1].isClosed()) {
+                return;
+            }
             mListAdapter = AccountsAdapter.getInstance(cursors[0], cursors[1],
                     AccountFolderList.this);
             mListView.setAdapter(mListAdapter);

src/com/android/email/activity/MailboxList.java

@@ -326,6 +326,9 @@ public class MailboxList extends ListActivity implements OnItemClickListener, On
 
         @Override
         protected void onPostExecute(Cursor cursor) {
+            if (cursor.isClosed()) {
+                return;
+            }
             MailboxList.this.mListAdapter.changeCursor(cursor);
         }
     }

src/com/android/email/activity/MessageList.java

@@ -941,6 +941,9 @@ public class MessageList extends ListActivity implements OnItemClickListener, On
 
         @Override
         protected void onPostExecute(Cursor cursor) {
+            if (cursor.isClosed()) {
+                return;
+            }
             MessageList.this.mListAdapter.changeCursor(cursor);
 
             // TODO: remove this hack and only update at the right time

src/com/android/email/activity/MessageView.java

@@ -906,6 +906,9 @@ public class MessageView extends Activity
 
         @Override
         protected void onPostExecute(Cursor cursor) {
+            if (cursor.isClosed()) {
+                return;
+            }
             // position the cursor on the current message
             while (cursor.moveToNext() && cursor.getLong(0) != mMessageId);
             mPrevNextCursor = cursor;
@@ -946,6 +949,9 @@ public class MessageView extends Activity
         
         @Override
         protected void onPostExecute(Cursor cursor) {
+            if (cursor.isClosed()) {
+                return;
+            }
             if (cursor.moveToFirst()) {
                 reloadUiFromCursor(cursor, mOkToFetch);
             } else {
@@ -984,6 +990,9 @@ public class MessageView extends Activity
         
         @Override
         protected void onPostExecute(Cursor cursor) {
+            if (cursor.isClosed()) {
+                return;
+            }
             if (cursor.moveToFirst()) {
                 reloadBodyFromCursor(cursor);
             } else {