Question

I have two problem while running below code

1. Mediaplayer is not stopping because it’s one method mp.isPlaying() always returns false.
2. Sometime i am getting invalid state exception.

try {
    String[] alerts = getResources().getStringArray(R.array.mp3files);
    int ch;
    StringBuffer fileContent = new StringBuffer("");
    FileInputStream fis = openFileInput("alertNo");
    byte[] buffer = new byte[1];
    int length;
    while ((length = fis.read(buffer)) != -1) {
        fileContent.append(new String(buffer));
    }
    String data = new String(fileContent);
    int position = Integer.parseInt(data);
    //m.setVolume(100, 100);
    if (m.isPlaying()) {
    m.stop();
    m.release();
    }
    AssetFileDescriptor descriptor = 
        MySettings.this.getAssets().openFd(alerts[position] + ".mp3");
    m.setDataSource(descriptor.getFileDescriptor(), 
        descriptor.getStartOffset(), descriptor.getLength());
    descriptor.close();
    m.prepare();
    m.start();
} catch (Exception e) {
    e.printStackTrace();
}

Answer 1

Check the documentation , once release is called there is no way to reuse the object. You will have to create another Mediaplayer.

Quoted.

 after release() is called, it is in the End state

and

Once the MediaPlayer object is in the End state, it can no longer be used and there is no way to bring it back to any other state.

So reinitialize the m object with a new Mediaplayer or reset it