绑定Service

                    前者我们必须通过Activity调用onStop来关闭service，如果Activity不管他，小service会一直运行下去，我们希望的是将Activity与Service绑定，实现关闭Activity同时关闭service。

这里需要一个：

public ServiceConnection connect=new ServiceConnection(){

  @Override
  public void onServiceConnected(ComponentName arg0, IBinder service) {
   // TODO Auto-generated method stub
   try {
    System.out.println("###ServiceConnection Sucess,service is"+service.getInterfaceDescriptor());
   } catch (RemoteException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }

}；

来管理绑定和解除绑定

现在我们定义service代码：

public class MyService extends Service{
	
	private IBinder mybinder=new IBinder(){

		

		//取得接口描述信息
		public String getInterfaceDescriptor() throws RemoteException {
			// TODO Auto-generated method stub
			return "MyService.class";//返回service类名称
		}

		@Override
		public void dump(FileDescriptor arg0, String[] arg1)
				throws RemoteException {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void dumpAsync(FileDescriptor arg0, String[] arg1)
				throws RemoteException {
			// TODO Auto-generated method stub
			
		}

		@Override
		public boolean isBinderAlive() {
			// TODO Auto-generated method stub
			return false;
		}

		@Override
		public void linkToDeath(DeathRecipient arg0, int arg1)
				throws RemoteException {
			// TODO Auto-generated method stub
			
		}

		@Override
		public boolean pingBinder() {
			// TODO Auto-generated method stub
			return false;
		}

		@Override
		public IInterface queryLocalInterface(String arg0) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public boolean transact(int arg0, Parcel arg1, Parcel arg2, int arg3)
				throws RemoteException {
			// TODO Auto-generated method stub
			return false;
		}

		@Override
		public boolean unlinkToDeath(DeathRecipient arg0, int arg1) {
			// TODO Auto-generated method stub
			return false;
		}
		
	};
	//绑定时触发
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		System.out.println("service:onBind Intent"+intent);
		return mybinder;
	}
	//重新绑定时触发
	public void onRebind(Intent intent) {
		// TODO Auto-generated method stub
		System.out.println("service:onRebind Intent"+intent);
		super.onRebind(intent);
	}
	//接触绑定时触发
	public boolean onUnbind(Intent intent) {
		// TODO Auto-generated method stub
		System.out.println("service:onUnbind Intent"+intent);
		return super.onUnbind(intent);
	}
	//创建时触发
	public void onCreat(){
		System.out.println("service:onCreat ");
		super.onCreate();
	}
//	public void onCreate() {
//		System.out.println("****onCreate");
//		
//	}
//
//	@Override
//	//销毁时触发
	public void onDestroy(){
		System.out.println("****onDestroy");
	}
	//启动时触发
	public int onStartCommand(Intent intent,int flag,int startid){
		System.out.println("****onStart  Intent"+intent+"  flag "+flag+"  startid:"+startid);
		return Service.START_CONTINUATION_MASK;
	}

}

 

布局函数加两个按钮：

 <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="start"
        android:text="启动Service" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="stop"
        android:text="停止Service" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="Bind"
        android:text="启动绑定" />

    <Button
        android:id="@+id/button4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="Unbind"
        android:text="解除绑定" />

 

Activity：

public class MainActivity extends Activity {

	public ServiceConnection connect=new ServiceConnection(){

		@Override
		public void onServiceConnected(ComponentName arg0, IBinder service) {
			// TODO Auto-generated method stub
			try {
				System.out.println("###ServiceConnection Sucess,service is"+service.getInterfaceDescriptor());
			} catch (RemoteException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		@Override
		public void onServiceDisconnected(ComponentName arg0) {
			// TODO Auto-generated method stub
			System.out.println("###ServiceConnection Failure");
		}
		
	};
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}
	public void start(View v){
		MainActivity.this.startService(new Intent(MainActivity.this,MyService.class));
		
	}
    public void stop(View v){
    	MainActivity.this.stopService(new Intent(MainActivity.this,MyService.class));
		
	}
    public void Bind(View v){
    	MainActivity.this.bindService(new Intent(MainActivity.this,MyService.class)
    	,MainActivity.this.connect,Context.BIND_AUTO_CREATE);
    	
    }
    public void Unbind(View v){
    	MainActivity.this.unbindService(MainActivity.this.connect);
    }

	
}

 

按绑定：

接触绑定：

 

当我突然退出程序的时候：

 实例完成，大家课后可以深入思考一下service工作原理