コード例 #1
0
 @Override
 public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
   mForecastAdapter.swapCursor(data);
   updateEmptyView();
   if (data.getCount() == 0) {
     getActivity().supportStartPostponedEnterTransition();
   } else {
     mRecyclerView
         .getViewTreeObserver()
         .addOnPreDrawListener(
             new ViewTreeObserver.OnPreDrawListener() {
               @Override
               public boolean onPreDraw() {
                 // Since we know we're going to get items, we keep the listener around until
                 // we see Children.
                 if (mRecyclerView.getChildCount() > 0) {
                   mRecyclerView.getViewTreeObserver().removeOnPreDrawListener(this);
                   int position = mForecastAdapter.getSelectedItemPosition();
                   if (position == RecyclerView.NO_POSITION && -1 != mInitialSelectedDate) {
                     Cursor data = mForecastAdapter.getCursor();
                     int count = data.getCount();
                     int dateColumn =
                         data.getColumnIndex(WeatherContract.WeatherEntry.COLUMN_DATE);
                     for (int i = 0; i < count; i++) {
                       data.moveToPosition(i);
                       if (data.getLong(dateColumn) == mInitialSelectedDate) {
                         position = i;
                         break;
                       }
                     }
                   }
                   if (position == RecyclerView.NO_POSITION) position = 0;
                   // If we don't need to restart the loader, and there's a desired position to
                   // restore
                   // to, do so now.
                   mRecyclerView.smoothScrollToPosition(position);
                   RecyclerView.ViewHolder vh =
                       mRecyclerView.findViewHolderForAdapterPosition(position);
                   if (null != vh && mAutoSelectView) {
                     mForecastAdapter.selectView(vh);
                   }
                   if (mHoldForTransition) {
                     getActivity().supportStartPostponedEnterTransition();
                   }
                   return true;
                 }
                 return false;
               }
             });
   }
 }
コード例 #2
0
 @Override
 public void onLoaderReset(Loader<Cursor> loader) {
   mForecastAdapter.swapCursor(null);
 }