Android学习-Service的绑定

关于service，我在bindService这里卡了一下，这里总结一下bindService。可以参见这篇文章（http://que2010.iteye.com/blog/1339791）

那么我自己的总结：先来说一下MyService里要怎么写：

MyService类

public class MyService extends Service {
	
	private MyBinder mbinder = new MyBinder() ;
    public class MyBinder extends Binder{
    	MyService getMyService(){
    		Log.e("MyService","getMyService");
    		return MyService.this;
    	}
    }
    @Override
	public IBinder onBind(Intent arg0) {
		Log.e("MyService","onBind");
		// TODO Auto-generated method stub
		return mbinder;
	}
    public void play(){
    	Log.e("MyService","play");
    }
	@Override
	public void onCreate() {
		Log.e("MyService","onCreate");
		// TODO Auto-generated method stub
		super.onCreate();
	}
	@Override
	public void onDestroy() {
		Log.e("MyService","onDestroy");
		// TODO Auto-generated method stub
		super.onDestroy();
	}
	@Override
	public void onRebind(Intent intent) {
		Log.e("MyService","onRebind");
		// TODO Auto-generated method stub
		super.onRebind(intent);
	}
	@Override
	public void onStart(Intent intent, int startId) {
		Log.e("MyService","onStart");
		// TODO Auto-generated method stub
		super.onStart(intent, startId);
	}
	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		Log.e("MyService","onStartCommand");
		// TODO Auto-generated method stub
		return super.onStartCommand(intent, flags, startId);
	}
	@Override
	public boolean onUnbind(Intent intent) {
		Log.e("MyService","onUnbind");
		// TODO Auto-generated method stub
		return super.onUnbind(intent);
	}
}

BindServiceTestActivity类，主要用于绑定Service

public class BindServiceTestActivity extends Activity {
	/** Called when the activity is first created. */
	private Button but1;
	private Button but2;
	private MyService myService;
	private MyBinder binder;
	private Context mcontext;
	private boolean isBind  ;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		but1 = (Button) findViewById(R.id.but1);
		but2 = (Button) findViewById(R.id.but2);
		Intent intent1 = new Intent(BindServiceTestActivity.this,MyService.class);
		intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		isBind = bindService(intent1, conn,Context.BIND_AUTO_CREATE);//如果这里用getApplicationContext()那么unbind时也要用这个，将这个上下文提升到                                                                              //全局，而不仅仅是当前Activity的Context
		
		but1.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub			
				Log.e("BindServiceTestActivity", "bind");
				myService.play();
			}
		});
		but2.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(isBind){
					unbindService(conn);
					Log.e("BindServiceTestActivity", "unbind");
					isBind = false ;
				}
			}
		});
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
	}

	private ServiceConnection conn = new ServiceConnection() {
		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			Log.e("BindServiceTestActivity", "onServiceConnected");
			// TODO Auto-generated method stub
			binder = (MyBinder) service;
			myService = binder.getMyService();
		}

		@Override
		public void onServiceDisconnected(ComponentName name) {
			// TODO Auto-generated method stub
			binder = null ;
		}
	};
}

当点击bind按钮时：直接就调用了play方法

当点击unbind时：onUnbind-->onDestroy 

这里没有调用onCreate(),是因为之前在调用的时候就指定了AUTO_CREATE,那为啥没得onStart()呢？

另外一种方式：

通过startService(),的话：onCreate()-->onStartCommand-->onStart()    (多次startService，只执行一次onCreate())

stopService()的话： onDestroy()