Java Android：如何为媒体播放器提供资源的字符串值

Question

I have a function where i run an audio

public void PlaySound(String FileName){
     MediaPlr = MediaPlayer.create(Context, R.raw.s1);
     MediaPlr.start();
}

The problem is R.raw.s1 , i want to replace s1 with FileName , but it doesn't take a String. What can i do???

Thanks for all help

Answer 1

If the file is stored in the res/raw/ directory, you can retrieve its identifier through the following code:

public void PlaySound(String fileName){
    int sound_id = context.getResources().getIdentifier(fileName, "raw",
                                                 context.getPackageName());
    if(sound_id != 0) {
      mediaPlr = MediaPlayer.create(context, sound_id);
      mediaPlr.start();
    }
}

I would also prefer to start variable names with small letters, rather than capital. This helps to distinguish from the static class.

You can also create a map to store the ID for further reuse instead of retrieving the identifier each time.

Answer 2

Try this method.You can specify your string file path in mediaPlayer.setDataSource

if(mMediaPlayer == null)
    mMediaPlayer    =   new MediaPlayer();
mMediaPlayer.reset();
try {
    mMediaPlayer.setDataSource(YourAudioFileLocation);
    mMediaPlayer.prepare();
} catch (IllegalArgumentException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
}
mMediaPlayer.start();