Android 播放音乐

package pw.pw11.mp3;

import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.media.MediaPlayer;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.io.IOException;

public class Mp3 extends AppCompatActivity {
    private MediaPlayer m;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Load_Sounds();

        final Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                m.start();
            }
        });
    }
    public void Load_Sounds() {
        m = MediaPlayer.create(this, R.raw.a);
    }

//    @Override
//    public boolean onTouchEvent(MotionEvent event) {
//        super.onTouchEvent(event);
//        switch (event.getAction()) {
//            case MotionEvent.ACTION_DOWN:
//                m.prepareAsync();
//                m.start();
//            case MotionEvent.ACTION_UP:
//                m.stop();
//                m.prepareAsync();
//        }
//        return true;
//    }
}