Android Open Source - MediaTechPlayer Audio List

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License

The source code is released under:

MIT License

Java Source Code

package hu.bme.mediatech.player;
/*from w w w  .  ja  v a2 s . c  om*/
import java.util.ArrayList;

import android.app.ListActivity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class AudioList extends ListActivity implements OnItemClickListener {
  private ArrayList<Album> albums;
  private ArrayList<AudioTrack> audioTracks;
  private Intent intent = new Intent();
  private static final int SELECT_ALBUM = 0, SELECT_AUDIOTRACK = 1;
  private int request;
  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getListView().setOnItemClickListener(this);
        
        final Intent in = super.getIntent();
        final String intentAction = in.getAction();
        if(intentAction.equals("mediatechplayer.select.ALBUM")) 
          request = SELECT_ALBUM;
        else if(intentAction.equals("mediatechplayer.select.AUDIOTRACK"))
          request = SELECT_AUDIOTRACK;
        
        switch(request) {
        case SELECT_ALBUM:
          albums = albumQuery();
          setListAdapter(new ArrayAdapter<Album>(this, android.R.layout.simple_list_item_1, albums));
          break;
        case SELECT_AUDIOTRACK:
          Album selectedAlbum = new Album(in.getBundleExtra("data"));
          audioTracks = audioQuery(selectedAlbum);
          setListAdapter(new ArrayAdapter<AudioTrack>(this, android.R.layout.simple_list_item_1, audioTracks));
          break;
        }
    }

  @Override
  public void onItemClick(AdapterView<?> adapter, View view, int position, long id) {
    switch(request) {
        case SELECT_ALBUM:
          intent.setAction("mediatechplayer.select.AUDIOTRACK");
          intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.putExtra("data", albums.get(position).toBundle());
          break;
        case SELECT_AUDIOTRACK:
          intent.setAction("mediatechplayer.selected.AUDIOTRACK");
          intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.putExtra("data", audioTracks.get(position).toBundle());
          break;
    }
    startActivity(intent);
  }
  
  private ArrayList<Album> albumQuery() {
    ArrayList<Album> albums = new ArrayList<Album>();
    final String[] projection = { MediaStore.Audio.Albums._ID, MediaStore.Audio.Albums.ALBUM,
                    MediaStore.Audio.Albums.ALBUM_ART };
    Cursor c = this.getContentResolver().query(
        MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI, 
        projection, null, null, MediaStore.Audio.Albums.ALBUM + " ASC");
      while(c.moveToNext()) {
        Album album = new Album(c.getLong(c.getColumnIndex("_id")));
        album.title = c.getString(c.getColumnIndex("album"));
        album.albumArtUri = c.getString(c.getColumnIndex("album_art")); 
        albums.add(album);
      }
      
      checkMissingData(c);
      c.close();
      
    return albums;
  }
  
  private ArrayList<AudioTrack> audioQuery() { 
    return audioQuery(null); 
  }
    private ArrayList<AudioTrack> audioQuery(Album selectedAlbum) {
      ArrayList<AudioTrack> audioTracks = new ArrayList<AudioTrack>();
      
      String selection = null;
      String[] selectionArgs = null;
      String sortOrder = MediaStore.Audio.AudioColumns.TITLE + " ASC";
      final String[] projection = { MediaStore.Audio.AudioColumns._ID, MediaStore.Audio.AudioColumns.TITLE,
                      MediaStore.Audio.AudioColumns.ALBUM, MediaStore.Audio.Media.ALBUM_ID,
                      MediaStore.Audio.AudioColumns.ARTIST, MediaStore.Audio.Media.TRACK,
                      MediaStore.Audio.AudioColumns.YEAR, MediaStore.Audio.AudioColumns.DURATION,                      
                      MediaStore.Audio.AudioColumns.SIZE };     
    
      if(selectedAlbum != null) {
        selection = MediaStore.Audio.AudioColumns.ALBUM_ID + "= ?";
        selectionArgs = new String[] { String.valueOf(selectedAlbum.albumID) };
        sortOrder = MediaStore.Audio.AudioColumns.TRACK + " ASC";
      }
      
      Cursor c = this.getContentResolver().query(
                MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, 
                projection, selection, selectionArgs, sortOrder);

      while(c.moveToNext()) {
        AudioTrack audioTrack = new AudioTrack(c.getLong(c.getColumnIndex("_id")));
        audioTrack.title = c.getString(c.getColumnIndex("title"));
        audioTrack.album = c.getString(c.getColumnIndex("album"));
        audioTrack.artist = c.getString(c.getColumnIndex("artist"));
        audioTrack.track = c.getInt(c.getColumnIndex("track"));
        audioTrack.year = c.getInt(c.getColumnIndex("year"));
        audioTrack.duration = c.getLong(c.getColumnIndex("duration"));
        audioTrack.size = c.getLong(c.getColumnIndex("_size"));
        if(selectedAlbum != null) audioTrack.albumArtUri = selectedAlbum.albumArtUri;
        audioTracks.add(audioTrack);
      }
      
      checkMissingData(c);
        c.close();
        
        return audioTracks;
    }
    
    private void checkMissingData(Cursor c) {
        if (c.moveToFirst());
        else Toast.makeText(this, getText(R.string.noMedia), Toast.LENGTH_LONG).show();
    }
}

Java Source Code List

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