在Android 2.3上使用MediaPlayer播放SD卡中的声音

Question

This works with android 4.2:

SOUNDS_DIR = getFilesDir().getAbsolutePath() + "/";
SoundToPlay = new MediaPlayer();
SoundToPlay.setDataSource(SOUNDS_DIR + ResourceID
        + ".mp3");
SoundToPlay.prepare();
SoundToPlay.start();

When i run it on android 2.3, LogCat prints:

MediaPlayer error(1, -2147483648)

If i use the exactly same file as resource (/res/raw/), works fine also with 2.3

Answer 1

Maybe try before to validate your path, like:

File path = Environment.getExternalStoragePublicDirectory(
    Environment.DIRECTORY_MUSIC);
 File file = new File(path, ResourceID+".mp3");

 // if file exists ....

After you can write:

SoundToPlay = new MediaPlayer();
SoundToPlay.setDataSource(path + "/" + ResourceID  + ".mp3");
SoundToPlay.prepare();
SoundToPlay.start();

[EDIT]

Instead of

SoundToPlay.setDataSource(SOUNDS_DIR + ResourceID + ".mp3");

set

FileInputStream fileInputStream = new FileInputStream(SOUNDS_DIR + ResourceID
    + ".mp3");
SoundToPlay.setDataSource(fileInputStream.getFD());         
SoundToPlay.prepare(); 

Answer 2

Try this:

String path = Environment.getExternalStorageDirectory() + "/sound.mp3";
File file = new File(path);
Uri uri = Uri.fromFile(file);
MediaPlayer mp = MediaPlayer.create(this, uri);

if (mp != null)
{
   mp.setOnCompletionListener(new OnCompletionListener() {
      @Override
      public void onCompletion(MediaPlayer mp) {
         mp.release();
      }
   });
   mp.start();
}

Good Luck.