在MediaStore.Audio.Playlists.Members.getContentUri(volume, playlistId)
中,字符串"external"作为音量参数。
该活动会列出Android设备上的歌曲、播放列表及其内容。
import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
public class PlaylistActivity extends Activity {
private final String [] STAR= {"*"};
private final String TAG= "list";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i(TAG, "All the titles");
Uri allaudio_uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Cursor ca= managedQuery(allaudio_uri, STAR, null,null,null);
for(ca.moveToFirst(); !ca.isAfterLast(); ca.moveToNext()){
if(ca.isFirst()){
for(int k= 0; k<ca.getColumnCount(); k++)
Log.i(TAG, " "+ca.getColumnName(k)+"="+ca.getString(k));
}else{
Log.i(TAG, ca.getString(ca.getColumnIndex("title")));
}
}
Log.i(TAG, "--------------------------");
Log.i(TAG, "All the playlists");
Uri playlist_uri= MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;
Cursor cursor= managedQuery(playlist_uri, STAR, null,null,null);
cursor.moveToFirst();
for(int r= 0; r<cursor.getCount(); r++, cursor.moveToNext()){
Log.i(TAG, "-----");
Log.i(TAG, "Playlist " + cursor.getString(cursor.getColumnIndex("name")));
for(int k= 0; k<cursor.getColumnCount(); k++)
Log.i(TAG, cursor.getColumnName(k)+"="+cursor.getString(k));
int id= cursor.getInt(0);
Uri membersUri = MediaStore.Audio.Playlists.Members.getContentUri("external", id);
Cursor membersCursor = managedQuery(membersUri, STAR, null, null, null);
membersCursor.moveToFirst();
for(int s= 0; s<membersCursor.getCount(); s++, membersCursor.moveToNext())
Log.i(TAG, " "+membersCursor.getString(membersCursor.getColumnIndex("title")));
membersCursor.close();
}
cursor.close();
}
}