Service Broadcast简单音乐播放功能

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
start = (ImageButton) findViewById(R.id.play);
stop = (ImageButton) findViewById(R.id.stop);
start.setOnClickListener(this);
stop.setOnClickListener(this);
activityReceiver = new ActivityReceiver();//广播接收器，主要负责播放/暂停按钮图标的变换
IntentFilter filter = new IntentFilter();
filter.addAction("com.sunny.update");
registerReceiver(activityReceiver, filter);
Intent intent = new Intent(this, MyService.class);//启动服务，音乐的播放用Service控制，不会因Activity退出而停止
startService(intent);
}

public class ActivityReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
int update=intent.getIntExtra("update", -1);
switch(update){
case 1:
status=1;
break;
case 2:
start.setImageResource(R.drawable.pause);
status=2;
break;
case 3:
start.setImageResource(R.drawable.play);
status=3;
break;
}
}
}

public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent("com.sunny.control");
switch (v.getId()) {
case R.id.play:
intent.putExtra("ACTION", 1);
sendBroadcast(intent);
break;
case R.id.stop:
intent.putExtra("ACTION", 2);
sendBroadcast(intent);
break;
}
}

public void onCreate() {
// TODO Auto-generated method stub
status=1;//当前状态，1 没有声音 2正在播放 3 暂停
serviceReceiver=new ServiceReceiver();//广播接收器，控制音乐播放
IntentFilter filter=new IntentFilter();
filter.addAction("com.sunny.control");
registerReceiver(serviceReceiver, filter);
super.onCreate();
}

class ServiceReceiver extends BroadcastReceiver{

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
int action=intent.getIntExtra("ACTION", -1);//过滤Intent Action为[b]com.sunny.control的广播，根据ACTION参数控制
[/b] switch(action){
case 1:
if(status==1){//在正在播放状态下
mp=MediaPlayer.create(context, R.raw.intro);
status=2;
Intent sendIntent=new Intent("com.sunny.update");
sendIntent.putExtra("update", 2);
sendBroadcast(sendIntent);
mp.start();
}
else if(status==2){//在暂停状态下
mp.pause();
status=3;
Intent sendIntent=new Intent("com.sunny.update");
sendIntent.putExtra("update",3);
sendBroadcast(sendIntent);
}else if(status==3){//在暂停后重新播放状态下
mp.start();
status=2;
Intent sendIntent=new Intent("com.sunny.update");
sendIntent.putExtra("update", 2);
sendBroadcast(sendIntent);

}
break;
case 2:
if(status==2||status==3){
mp.stop();
status=1;
Intent sendIntent=new Intent("com.sunny.update");
sendIntent.putExtra("update",1);
sendBroadcast(sendIntent);
}
}
}

}