Plays back media from the MediaStore.
This is the default media player in the current Android SDK 1.0 and is therefore also shipped with the T-mobile G1.
Activity namespace: com.android.music/com.android.music.MediaPlaybackActivity
To play back the first audio file in the internal audio content provider, you can use the following code:
Intent i = new Intent(Intent.ACTION_VIEW);
Uri u = Uri.withAppendedPath(MediaStore.Audio.Media.INTERNAL_CONTENT_URI, "1");