android四大组件之Service 播放音乐

package com.example.musicplay;

public interface PlayInterface {
void play();
void playContiue();
void pause();
}

package com.example.musicplay;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.IBinder;

public class PlayService extends Service {
private MediaPlayer mediaPlayer;
@Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
return new MusicBinder();
}
class MusicBinder extends Binder implements PlayInterface{

@Override
public void play() {
// TODO Auto-generated method stub
PlayService.this.play();
}

@Override
public void playContiue() {
// TODO Auto-generated method stub
PlayService.this.playContiue();
}

@Override
public void pause() {
// TODO Auto-generated method stub
PlayService.this.pause();

}

}
@Override
public void onCreate() {
mediaPlayer = new MediaPlayer();
}

private void play(){
//重置
mediaPlayer.reset();
try {
mediaPlayer.setDataSource("sdcard/Charlotte Perrelli - Hero.mp3");
//准备
mediaPlayer.prepare();
} catch (Exception e) {
// TODO Auto-generated catcssh block
e.printStackTrace();
}
mediaPlayer.start();
}
private void playContiue(){
mediaPlayer.start();
}
private void pause(){
mediaPlayer.pause();
}
}

package com.example.musicplay;

import android.os.Bundle;
import android.os.IBinder;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;

public class MainActivity extends Activity {
private PlayInterface p;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent intent = new Intent(this,PlayService.class);
startService(intent);
bindService(intent, new Conn(), BIND_AUTO_CREATE);

findViewById(R.id.paly).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
p.play();

}
});
findViewById(R.id.contiue).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
p.playContiue();

}
});
findViewById(R.id.pause).setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
p.pause();
}
});
}
class Conn implements ServiceConnection{

@Override
public void onServiceConnected(ComponentName arg0, IBinder arg1) {
// TODO Auto-generated method stub
p = (PlayInterface) arg1;
}

@Override
public void onServiceDisconnected(ComponentName arg0) {
// TODO Auto-generated method stub

}

}

}