public void updateTrackList() { // clear list mDataSource.deleteAll(); TrackListAbstract tracksFragment = (TrackListAbstract) getSupportFragmentManager().findFragmentByTag("tracks"); TrackAdapter tracksAdapter = null; if (null != tracksFragment) { tracksAdapter = tracksFragment.getAdapter(); } new TrackListUpdater(this, mDataSource, tracksAdapter, TrackListUpdater.URL_TRACKS) .execute(mPreferenceUser); TrackListAbstract notepadFragment = (TrackListAbstract) getSupportFragmentManager().findFragmentByTag("notepad"); TrackAdapter notepadAdapter = null; if (null != notepadFragment) { notepadAdapter = notepadFragment.getAdapter(); } new TrackListUpdater(this, mDataSource, notepadAdapter, TrackListUpdater.URL_NOTEPAD) .execute(mPreferenceUser); }