I am newbie to android and have implemented pull to refresh and a custom ListView in my demo app. I am deleting an item from listItem class,when I am dong pull to refresh that item is removed from my ListView but it must needed to do that,I want to remove that item once deleted.I have tried notifyDatasetChange which will not work in my case.So I want to do pulling my list to down programatically so list will be refresh,Please help me to do it.Thank you
public class TimelineFragment extends BaseFragment implements LoaderManager.LoaderCallbacks<List<Post>>, OnRefreshListener, OnScrollListener {
private static boolean inBackground = false;
public static android.widget.PopupMenu popupMenu;
private int index = -1;
private int top = 0;
public static TimelineAdapter mTimelineAdapter;
public TimelineLoader mTimelineLoader;
public PullToRefreshLayout mPullToRefreshLayout;
public static ListView mListViewTimeline;
ProgressBar mProgressBarLoading;
TextView mTextViewNoItems;
ImageView im;
Menu mm;
int total;
Activity activity;
private int hot_number = 0;
private TextView ui_hot = null;
int lastPosition;
int lastTop;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_timeline, container, false);
setHasOptionsMenu(true);
return rootView;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
private boolean isAppIsInBackground(Context context) {
boolean isInBackground = true;
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
ComponentName componentInfo = taskInfo.get(0).topActivity;
if (componentInfo.getPackageName().equals(context.getPackageName())) {
isInBackground = false;
}
return isInBackground;
}
public void updateHotCount(final int new_hot_number) {
hot_number = new_hot_number;
if (ui_hot == null) return;
if (new_hot_number == 0)
ui_hot.setVisibility(View.INVISIBLE);
else {
ui_hot.setVisibility(View.VISIBLE);
ui_hot.setText(Integer.toString(new_hot_number));
}
}
@Override
public void onPause() {
super.onPause();
if (isAppIsInBackground(getActivity())) {
Log.d("ACTION", "RETURN FROM BACGRKOUDN");
getLoaderManager().destroyLoader(0);
getLoaderManager().initLoader(0, null, TimelineFragment.this);
}
}
public void onStop() {
super.onStop();
if(mTimelineLoader != null) {
mTimelineLoader.stopLoading();
}
lastPosition = mListViewTimeline.getFirstVisiblePosition();
View v = mListViewTimeline.getChildAt(0);
lastTop = (v == null) ? 0 : v.getTop();
// lastPosition = mListViewTimeline.getSelectedItemPosition();
// int lastPositionInGroup = lastPosition - mListViewTimeline.getFirstVisiblePosition();
// lastTop = mListViewTimeline.getChildAt( lastPositionInGroup ).getTop();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
getActivity().getMenuInflater().inflate(R.menu.search_post, menu);
final View menu_hotlist = menu.findItem(R.id.activity22).getActionView();
ui_hot = (TextView) menu_hotlist.findViewById(R.id.hotlist_hot);
SharedPreferences preferences = getActivity().getSharedPreferences("Notifications", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
updateHotCount(preferences.getInt("notifications", 0));
new MyMenuItemStuffListener(menu_hotlist, "Show hot message") {
@Override
public void onClick(View v) {
Intent intent = new Intent(getActivity(), ActivityActivity.class);
intent.putExtra("View_mode", true);
startActivity(intent);
}
};
}
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.search22) {
// Log.d("MyApp", "action bar clicked");
Intent intent = new Intent(getActivity(), SearchPostActivity.class);
intent.putExtra("View_mode", true);
startActivity(intent);
}
if (id == R.id.activity22) {
Intent intent = new Intent(getActivity(), ActivityActivity.class);
intent.putExtra("View_mode", true);
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
total = 0;
mPullToRefreshLayout = (PullToRefreshLayout) getActivity().findViewById(R.id.ptr_layout);
ActionBarPullToRefresh.from(getActivity()).allChildrenArePullable().listener(this).setup(mPullToRefreshLayout);
mProgressBarLoading = (ProgressBar) getActivity().findViewById(R.id.progressBarLoading);
mTextViewNoItems = (TextView) getActivity().findViewById(R.id.textViewNoItems);
mTimelineAdapter = new TimelineAdapter(getActivity());
mListViewTimeline = (ListView) getActivity().findViewById(R.id.listViewTimeline);
mListViewTimeline.setEmptyView(mProgressBarLoading);
mListViewTimeline.setAdapter(mTimelineAdapter);
mTimelineAdapter.notifyDataSetChanged();
mListViewTimeline.setOnScrollListener(this);
// mListViewTimeline.setTranscriptMode(ListView.TRANSCRIPT_MODE_ALWAYS_SCROLL);
mListViewTimeline.setVerticalScrollBarEnabled(false);
activity = getActivity();
if(activity != null) {
final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
getLoaderManager().initLoader(0, null, TimelineFragment.this);
//Do something after 100ms
}
}, 1000);
mTextViewNoItems.setOnClickListener(new OnClickListener() {
@Override
public void onClick(final View v) {
getLoaderManager().destroyLoader(0);
getLoaderManager().initLoader(0, null, TimelineFragment.this);
Log.d("CLICK", "REFRESH");
}
});
}
}
@Override
public Loader<List<Post>> onCreateLoader(int id, Bundle args) {
mTimelineLoader = new TimelineLoader(getActivity(), mListViewTimeline);
setHasOptionsMenu(true);
return mTimelineLoader;
}
@Override
public void onLoadFinished(Loader<List<Post>> arg0, List<Post> data) {
mTimelineAdapter.setData(data);
mTimelineAdapter.notifyDataSetChanged();
mPullToRefreshLayout.setRefreshComplete();
mTextViewNoItems.setVisibility(View.VISIBLE);
mProgressBarLoading.setVisibility(View.INVISIBLE);
mListViewTimeline.setEmptyView(mTextViewNoItems);
if (data.isEmpty()) {
getLoaderManager().destroyLoader(0);
getLoaderManager().initLoader(0, null, TimelineFragment.this);
}
}
@Override
public void onLoaderReset(Loader<List<Post>> arg0) {
mTimelineAdapter.setData(null);
setHasOptionsMenu(true);
}
@Override
public void onRefreshStarted(View view) {
getLoaderManager().destroyLoader(0);
getLoaderManager().initLoader(0, null, this);
mTextViewNoItems.setVisibility(View.INVISIBLE);
mProgressBarLoading.setVisibility(View.VISIBLE);
mListViewTimeline.setEmptyView(mProgressBarLoading);
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (firstVisibleItem + visibleItemCount >= totalItemCount && visibleItemCount != 0) {
if (mTimelineLoader.loadMore() && !mTimelineLoader.loading()) {
total = totalItemCount - 1;
lastPosition = view.getFirstVisiblePosition();
View v = view.getChildAt(0);
lastTop = (v == null) ? 0 : v.getTop();
mTimelineLoader.onContentChanged();
}
}
}