使用MediaPlayer播放、暂停、停止音乐

package com.pingyijinren.test;

import android.media.MediaPlayer;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import java.io.File;
import java.io.IOException;

public class MainActivity extends AppCompatActivity{
private Button play;
private Button pause;
private Button reset;
private MediaPlayer mediaPlayer;
private File file;

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

play=(Button)findViewById(R.id.play);
pause=(Button)findViewById(R.id.pause);
reset=(Button)findViewById(R.id.reset);
mediaPlayer=new MediaPlayer();

try{
file=new File(Environment.getExternalStorageDirectory()+"/netease/cloudmusic/Music/Apnea - Tongue.mp3");
mediaPlayer.setDataSource(file.getPath());
mediaPlayer.prepare();
}
catch(IOException e){
Toast.makeText(this,"音乐不存在！",Toast.LENGTH_SHORT).show();
}

play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(!mediaPlayer.isPlaying()){
mediaPlayer.start();
}
}
});

pause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
}
}
});

reset.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(mediaPlayer.isPlaying()){
mediaPlayer.reset();

try{
mediaPlayer.setDataSource(file.getPath());
mediaPlayer.prepare();
}
catch(IOException e){}
}
}
});
}

@Override
public void onDestroy(){
super.onDestroy();

if(mediaPlayer!=null){
mediaPlayer.stop();
mediaPlayer.release();
}
}
}