Android Open Source - muckebox-android Download List Fragment

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License

The source code is released under:
Apache License
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Java Source Code

/*   
 * Copyright 2013 Karsten Patzwaldt// w  w  w  . j  av a  2  s  . c  o m
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.muckebox.android.ui.fragment;

import org.muckebox.android.R;
import org.muckebox.android.db.MuckeboxProvider;
import org.muckebox.android.db.MuckeboxContract.ArtistEntry;
import org.muckebox.android.db.MuckeboxContract.DownloadEntry;
import org.muckebox.android.db.MuckeboxContract.TrackEntry;
import org.muckebox.android.net.DownloadService;
import org.muckebox.android.ui.utils.ExpandableCursorAdapter;

import android.app.ListFragment;
import android.app.LoaderManager;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.text.format.Formatter;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.SimpleCursorAdapter;
import android.widget.SimpleCursorAdapter.ViewBinder;
import android.widget.TextView;

public class DownloadListFragment extends ListFragment
  implements LoaderManager.LoaderCallbacks<Cursor> {

  SimpleCursorAdapter mAdapter;

  MenuItem mClearButton;
  
  private class DownloadViewBinder implements ViewBinder
  {
    @Override
    public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
      if (columnIndex == cursor.getColumnIndex(DownloadEntry.ALIAS_STATUS))
      {
        ImageView icon = (ImageView) view;
        
        switch (cursor.getInt(columnIndex))
        {
        case DownloadEntry.STATUS_VALUE_DOWNLOADING:
          icon.setImageResource(R.drawable.av_download);
          break;
        case DownloadEntry.STATUS_VALUE_QUEUED:
          icon.setImageResource(R.drawable.device_access_time);
          break;
        }
        
        return true;
      } else if (columnIndex == cursor.getColumnIndex(DownloadEntry.ALIAS_BYTES_DOWNLOADED)) {
        TextView text = (TextView) view;
        int size = cursor.getInt(columnIndex);
        
        if (size == 0)
          text.setText("");
        else
          text.setText(Formatter.formatFileSize(getActivity(), size));
        
        return true;
      }
        
      return false;
    }
  }
  
  private class DownloadCursorAdapter extends ExpandableCursorAdapter {
    private OnClickListener mDiscardListener;
    
    public DownloadCursorAdapter(Context context, int layout, Cursor c,
        String[] from, int[] to, int flags) {
      super(context, layout, c, from, to, flags);
      
      mDiscardListener = new OnClickListener() {
        public void onClick(View v) {
          Intent intent = new Intent(getActivity(), DownloadService.class);
          
          intent.putExtra(DownloadService.EXTRA_COMMAND,
              DownloadService.COMMAND_DISCARD);
          intent.putExtra(DownloadService.EXTRA_TRACK_ID,
              getTrackId(getItemIndex(v)));
          
          getActivity().startService(intent);
          
          toggleExpanded(v);
        }
      };
    }
    
    private int getTrackId(int position) {
      Cursor c = getCursor();
      
      c.moveToPosition(position);
      
      return c.getInt(c.getColumnIndex(TrackEntry.ALIAS_ID));
    }
    
    @Override
    public View getView(final int position, View convertView, ViewGroup parent)
    {
      View ret = super.getView(position, convertView, parent);
      
      if (ret.getTag() == null)
      {
        ImageButton discardButton =
            (ImageButton) ret.findViewById(R.id.download_list_row_discard);
        
        discardButton.setOnClickListener(mDiscardListener);
        
        ret.setTag(true);
      }
      
      return ret;
    }
  }
  
  @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_downloads, container, false);
  }
  
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

        setHasOptionsMenu(true);

        mAdapter = new DownloadCursorAdapter(getActivity(),
                R.layout.list_row_download, null,
                new String[] {
              TrackEntry.ALIAS_TITLE,
              ArtistEntry.ALIAS_NAME,
              DownloadEntry.ALIAS_STATUS,
              DownloadEntry.ALIAS_BYTES_DOWNLOADED
            },
                new int[] {
              R.id.download_list_row_title,
              R.id.download_list_row_artist,
              R.id.download_list_row_status,
              R.id.download_list_row_bytes_downloaded
            }, 0);
        mAdapter.setViewBinder(new DownloadViewBinder());
        
        setListAdapter(mAdapter);

        getLoaderManager().initLoader(0, null, this);
        
        getActivity().setTitle(R.string.title_activity_downloads);
  }
  
    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
      super.onCreateOptionsMenu(menu, inflater);
      
      inflater.inflate(R.menu.download_list, menu);
      
      mClearButton = menu.findItem(R.id.download_list_action_clear);
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
      if (item == mClearButton)
      {
        Intent intent = new Intent(getActivity(), DownloadService.class);
        intent.putExtra(DownloadService.EXTRA_COMMAND, DownloadService.COMMAND_CLEAR);
        getActivity().startService(intent);
        
        return true;
      }
      
      return super.onOptionsItemSelected(item);
    }
  
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {
        return new CursorLoader(getActivity(),
            MuckeboxProvider.URI_DOWNLOADS_WITHDETAILS, null, null, null, null);
    }

    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        mAdapter.swapCursor(data);
    }

    public void onLoaderReset(Loader<Cursor> loader) {
        mAdapter.swapCursor(null);
    }
}
Java Source Code List
