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package de.danoeh.antennapod.fragment;
import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Parcelable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.mobeta.android.dslv.DragSortListView;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.activity.MainActivity;
import de.danoeh.antennapod.adapter.DefaultActionButtonCallback;
import de.danoeh.antennapod.adapter.QueueListAdapter;
import de.danoeh.antennapod.asynctask.DownloadObserver;
import de.danoeh.antennapod.dialog.FeedItemDialog;
import de.danoeh.antennapod.feed.EventDistributor;
import de.danoeh.antennapod.feed.FeedItem;
import de.danoeh.antennapod.feed.FeedMedia;
import de.danoeh.antennapod.service.download.Downloader;
import de.danoeh.antennapod.storage.DBReader;
import de.danoeh.antennapod.storage.DBWriter;
import de.danoeh.antennapod.util.QueueAccess;
import de.danoeh.antennapod.util.UndoBarController;
import de.danoeh.antennapod.util.gui.FeedItemUndoToken;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
/**
* Shows all items in the queue
*/
public class QueueFragment extends Fragment {
private static final String TAG = "QueueFragment";
private static final int EVENTS = EventDistributor.DOWNLOAD_HANDLED |
EventDistributor.DOWNLOAD_QUEUED |
EventDistributor.QUEUE_UPDATE;
private DragSortListView listView;
private QueueListAdapter listAdapter;
private TextView txtvEmpty;
private ProgressBar progLoading;
private UndoBarController undoBarController;
private List<FeedItem> queue;
private List<Downloader> downloaderList;
private boolean itemsLoaded = false;
private boolean viewsCreated = false;
private AtomicReference<Activity> activity = new AtomicReference<Activity>();
private DownloadObserver downloadObserver = null;
private FeedItemDialog feedItemDialog;
/**
* Download observer updates won't result in an upate of the list adapter if this is true.
*/
private boolean blockDownloadObserverUpdate = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
startItemLoader();
}
@Override
public void onStart() {
super.onStart();
EventDistributor.getInstance().register(contentUpdate);
}
@Override
public void onStop() {
super.onStop();
EventDistributor.getInstance().unregister(contentUpdate);
stopItemLoader();
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
this.activity.set((MainActivity) activity);
if (downloadObserver != null) {
downloadObserver.setActivity(activity);
downloadObserver.onResume();
}
if (viewsCreated && itemsLoaded) {
onFragmentLoaded();
}
}
@Override
public void onDetach() {
super.onDetach();
listAdapter = null;
undoBarController = null;
activity.set(null);
viewsCreated = false;
blockDownloadObserverUpdate = false;
if (downloadObserver != null) {
downloadObserver.onPause();
}
feedItemDialog = null;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View root = inflater.inflate(R.layout.queue_fragment, container, false);
listView = (DragSortListView) root.findViewById(android.R.id.list);
txtvEmpty = (TextView) root.findViewById(android.R.id.empty);
progLoading = (ProgressBar) root.findViewById(R.id.progLoading);
listView.setEmptyView(txtvEmpty);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
FeedItem item = (FeedItem) listAdapter.getItem(position - listView.getHeaderViewsCount());
if (item != null) {
feedItemDialog = new FeedItemDialog(activity.get(), item, QueueAccess.ItemListAccess(queue));
feedItemDialog.show();
}
}
});
listView.setRemoveListener(new DragSortListView.RemoveListener() {
@Override
public void remove(int which) {
stopItemLoader();
FeedItem item = (FeedItem) listView.getAdapter().getItem(which);
DBWriter.removeQueueItem(getActivity(), item.getId(), true);
undoBarController.showUndoBar(false,
getString(R.string.removed_from_queue), new FeedItemUndoToken(item,
which)
);
}
});
undoBarController = new UndoBarController(root.findViewById(R.id.undobar), new UndoBarController.UndoListener() {
@Override
public void onUndo(Parcelable token) {
// Perform the undo
FeedItemUndoToken undoToken = (FeedItemUndoToken) token;
if (token != null) {
long itemId = undoToken.getFeedItemId();
int position = undoToken.getPosition();
DBWriter.addQueueItemAt(getActivity(), itemId, position, false);
}
}
});
listView.setDragSortListener(new DragSortListView.DragSortListener() {
@Override
public void drag(int from, int to) {
Log.d(TAG, "drag");
blockDownloadObserverUpdate = true;
}
@Override
public void drop(int from, int to) {
Log.d(TAG, "drop");
blockDownloadObserverUpdate = false;
stopItemLoader();
final FeedItem item = queue.remove(from);
queue.add(to, item);
listAdapter.notifyDataSetChanged();
DBWriter.moveQueueItem(getActivity(), from, to, true);
}
@Override
public void remove(int which) {
}
});
if (!itemsLoaded) {
progLoading.setVisibility(View.VISIBLE);
txtvEmpty.setVisibility(View.GONE);
}
viewsCreated = true;
if (itemsLoaded && activity.get() != null) {
onFragmentLoaded();
}
return root;
}
private void onFragmentLoaded() {
if (listAdapter == null) {
listAdapter = new QueueListAdapter(activity.get(), itemAccess, new DefaultActionButtonCallback(activity.get()));
listView.setAdapter(listAdapter);
downloadObserver = new DownloadObserver(activity.get(), new Handler(), downloadObserverCallback);
downloadObserver.onResume();
}
listAdapter.notifyDataSetChanged();
if (feedItemDialog != null && feedItemDialog.isShowing()) {
feedItemDialog.setQueue(QueueAccess.ItemListAccess(queue));
feedItemDialog.setItemFromCollection(queue);
feedItemDialog.updateMenuAppearance();
}
}
private DownloadObserver.Callback downloadObserverCallback = new DownloadObserver.Callback() {
@Override
public void onContentChanged() {
if (listAdapter != null && !blockDownloadObserverUpdate) {
listAdapter.notifyDataSetChanged();
}
if (feedItemDialog != null && feedItemDialog.isShowing()) {
feedItemDialog.updateMenuAppearance();
}
}
@Override
public void onDownloadDataAvailable(List<Downloader> downloaderList) {
QueueFragment.this.downloaderList = downloaderList;
if (listAdapter != null && !blockDownloadObserverUpdate) {
listAdapter.notifyDataSetChanged();
}
}
};
private QueueListAdapter.ItemAccess itemAccess = new QueueListAdapter.ItemAccess() {
@Override
public int getCount() {
return (itemsLoaded) ? queue.size() : 0;
}
@Override
public FeedItem getItem(int position) {
return (itemsLoaded) ? queue.get(position) : null;
}
@Override
public int getItemDownloadProgressPercent(FeedItem item) {
if (downloaderList != null) {
for (Downloader downloader : downloaderList) {
if (downloader.getDownloadRequest().getFeedfileType() == FeedMedia.FEEDFILETYPE_FEEDMEDIA
&& downloader.getDownloadRequest().getFeedfileId() == item.getMedia().getId()) {
return downloader.getDownloadRequest().getProgressPercent();
}
}
}
return 0;
}
};
private EventDistributor.EventListener contentUpdate = new EventDistributor.EventListener() {
@Override
public void update(EventDistributor eventDistributor, Integer arg) {
if ((arg & EVENTS) != 0) {
startItemLoader();
}
}
};
private ItemLoader itemLoader;
private void startItemLoader() {
if (itemLoader != null) {
itemLoader.cancel(true);
}
itemLoader = new ItemLoader();
itemLoader.execute();
}
private void stopItemLoader() {
if (itemLoader != null) {
itemLoader.cancel(true);
}
}
private class ItemLoader extends AsyncTask<Void, Void, List<FeedItem>> {
@Override
protected void onPreExecute() {
super.onPreExecute();
if (viewsCreated && !itemsLoaded) {
listView.setVisibility(View.GONE);
txtvEmpty.setVisibility(View.GONE);
progLoading.setVisibility(View.VISIBLE);
}
}
@Override
protected void onPostExecute(List<FeedItem> feedItems) {
super.onPostExecute(feedItems);
listView.setVisibility(View.VISIBLE);
progLoading.setVisibility(View.GONE);
if (feedItems != null) {
queue = feedItems;
itemsLoaded = true;
if (viewsCreated && activity.get() != null) {
onFragmentLoaded();
}
}
}
@Override
protected List<FeedItem> doInBackground(Void... params) {
Context context = activity.get();
if (context != null) {
return DBReader.getQueue(context);
}
return null;
}
}
}
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