android多媒体部分学习笔记五----audio

/**

* 打开内置音乐播放器

*/

private void getAudio() {

Intent intent = new Intent(Intent.ACTION_VIEW);

File sdcard = Environment.getExternalStorageDirectory();

File audioFile = new File(sdcard.getPath() + "/music/young_for_you.mp3");

intent.setDataAndType(Uri.fromFile(audioFile), "audio/mp3");

startActivity(intent);

}

/**

* 音频播放器---播放列表

*

* @time 下午01:33:53

* @author retacn yue

* @Email zhenhuayue@sina.com

*/

public class AudioBrowserActivity extends ListActivity {

public static int STATE_SELECT_ALBUM = 0;

public static int STATE_SELECT_SONG = 1;

int currentState = STATE_SELECT_ALBUM;

private Cursor cursor;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.audio_browser);

String[] columns = { MediaStore.Audio.Albums._ID, MediaStore.Audio.Albums.ALBUM };

cursor = managedQuery(Media.EXTERNAL_CONTENT_URI, columns, null, null, null);

String[] displayFields = new String[] { MediaStore.Audio.Albums.ALBUM };

int[] displayViews = new int[] { android.R.id.text1 };

setListAdapter(new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, cursor, displayFields, displayViews));

}

@Override

protected void onListItemClick(ListView l, View v, int position, long id) {

if (currentState == STATE_SELECT_ALBUM) {

if (cursor.moveToPosition(position)) {

String[] columns = {//

MediaStore.Audio.Media.DATA,//

MediaStore.Audio.Media._ID,//

MediaStore.Audio.Media.TITLE,//

MediaStore.Audio.Media.DISPLAY_NAME,//

MediaStore.Audio.Media.MIME_TYPE };//

String where = MediaStore.Audio.Media.ALBUM + "= ? ";

String whereValue[] = { cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM)) };

String orderBy = MediaStore.Audio.Media.TITLE;

cursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, columns, where, whereValue, orderBy);

cursor = managedQuery(Media.EXTERNAL_CONTENT_URI, columns, null, null, null);

String[] displayFields = new String[] { MediaStore.Audio.Albums.ALBUM };

int[] displayViews = new int[] { android.R.id.text1 };

setListAdapter(new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, cursor, displayFields, displayViews));

currentState = STATE_SELECT_SONG;

}

} else if (currentState == STATE_SELECT_SONG) {

if (cursor.moveToPosition(position)) {

if (cursor.moveToPosition(position)) {

int fileColumn = cursor.getColumnIndex(MediaStore.Audio.Media.DATA);

int mimeTypeColumn = cursor.getColumnIndex(MediaStore.Audio.Media.MIME_TYPE);

String audioFilePath = cursor.getString(fileColumn);

String mimeType = cursor.getString(mimeTypeColumn);

Intent intent = new Intent(Intent.ACTION_VIEW);

File file = new File(audioFilePath);

intent.setDataAndType(Uri.fromFile(file), mimeType);

startActivity(intent);

}

}

}

}

}