android service 之 Binder

1，创建MusicPlayService继承Service

publicclassMusicPlayServiceextendsService{}

2, 在MusicPlayService中创建内部类Mybinder继承Binder

publicfinalclassMybinderextendsBinder{publicMusicPlayServicegetService(){returnMusicPlayService.this;}}

3, 重写onBinder()方法，反回内部类Mybinder实例对象

publicIBinderonBind(Intentarg0){//TODOAuto-generatedmethodstubreturnnewMybinder();}

4，重写onCreate()

publicvoidonCreate(){//TODOAuto-generatedmethodstubToast.makeText(this,"MusicSeviceonCreate()",Toast.LENGTH_SHORT).show();Log.e("test","--->onCreate()");//musicplay=BackgroundMusicPlay.getBackgroundMusicPlay(this);super.onCreate();}

5，在activity中绑定service

MusicPlayServiceservice;//声明服务对象//绑定服务Intentintent2=newIntent(ShorMusicPlay.this,MusicPlayService.class);bindService(intent2,conn,BIND_AUTO_CREATE);//调用服务，通过第6步中的service=((Mybinder)arg1).getService();得到实例对象service.playMusic();//playMusic可自行在MusicPlayService中添加

6，在ServiceConnection的onServiceConnected得到MusicPlayService的实例对象

privateServiceConnectionconn=newServiceConnection(){@OverridepublicvoidonServiceConnected(ComponentNamearg0,IBinderarg1){//TODOAuto-generatedmethodstubLog.e("test","onServiceConnected");service=((Mybinder)arg1).getService();//得到MusicPlayService实例对象}@OverridepublicvoidonServiceDisconnected(ComponentNamearg0){//TODOAuto-generatedmethodstubLog.e("test","onServiceDisconnected");}};

7，在onDestroy()方法中解除绑定

protectedvoidonDestroy(){//TODOAuto-generatedmethodstubsuper.onDestroy();unbindService(conn);}

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