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package de.danoeh.antennapod.fragment;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.View;
import de.danoeh.antennapod.adapter.DownloadLogAdapter;
import de.danoeh.antennapod.feed.EventDistributor;
import de.danoeh.antennapod.service.download.DownloadStatus;
import de.danoeh.antennapod.storage.DBReader;
import java.util.List;
/**
* Shows the download log
*/
public class DownloadLogFragment extends ListFragment {
private List<DownloadStatus> downloadLog;
private DownloadLogAdapter adapter;
private boolean viewsCreated = false;
private boolean itemsLoaded = false;
@Override
public void onStart() {
super.onStart();
EventDistributor.getInstance().register(contentUpdate);
startItemLoader();
}
@Override
public void onStop() {
super.onStop();
EventDistributor.getInstance().unregister(contentUpdate);
stopItemLoader();
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
viewsCreated = true;
if (itemsLoaded) {
onFragmentLoaded();
}
}
private void onFragmentLoaded() {
if (adapter == null) {
adapter = new DownloadLogAdapter(getActivity(), itemAccess);
setListAdapter(adapter);
}
setListShown(true);
adapter.notifyDataSetChanged();
}
private DownloadLogAdapter.ItemAccess itemAccess = new DownloadLogAdapter.ItemAccess() {
@Override
public int getCount() {
return (downloadLog != null) ? downloadLog.size() : 0;
}
@Override
public DownloadStatus getItem(int position) {
return (downloadLog != null) ? downloadLog.get(position) : null;
}
};
private EventDistributor.EventListener contentUpdate = new EventDistributor.EventListener() {
@Override
public void update(EventDistributor eventDistributor, Integer arg) {
if ((arg & EventDistributor.DOWNLOADLOG_UPDATE) != 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<DownloadStatus>> {
@Override
protected void onPostExecute(List<DownloadStatus> downloadStatuses) {
super.onPostExecute(downloadStatuses);
if (downloadStatuses != null) {
downloadLog = downloadStatuses;
itemsLoaded = true;
if (viewsCreated) {
onFragmentLoaded();
}
}
}
@Override
protected List<DownloadStatus> doInBackground(Void... params) {
Context context = getActivity();
if (context != null) {
return DBReader.getDownloadLog(context);
}
return null;
}
}
}
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