Android -- service 利用廣播調用服務的方法

1. 實現原理，在Service里面注冊一個廣播接收者， 想要調用的時候app發送出廣播，

后台的service里面的廣播接收者接收到廣播，並調用service里面的方法。

 

2. 示例代碼

MainActivity.java  開啟service 發出廣播

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		Intent intent = new Intent(this, MyService.class);
		startService(intent);
	}
	
	public void call(View v){
		//發出一個特定的廣播 service里面的接受器就能接收到，並調用service的方法
		Intent intent = new Intent();
		intent.setAction("com.kevin.callmethod");
		sendBroadcast(intent);
	}

MyService.java  ，service 內涵廣播接收者的 實現與注冊

public class MyService extends Service {

	private MyReceiver myReceiver;
	
	@Override
	public IBinder onBind(Intent intent) {
		return null;
	}
	
	@Override
	public void onCreate() {
		myReceiver = new MyReceiver();
		IntentFilter filter = new IntentFilter();
		filter.addAction("com.kevin.callmethod");
		registerReceiver(myReceiver, filter);
		super.onCreate();
	}
	
	@Override
	public void onDestroy() {
		unregisterReceiver(myReceiver);
		super.onDestroy();
	}
	
	private class MyReceiver extends BroadcastReceiver{
		@Override
		public void onReceive(Context context, Intent intent) {
			Toast.makeText(getApplicationContext(), "接受到廣播", 0).show();
			methodInService();
		}		
	}
	
	private void methodInService(){
		Toast.makeText(getApplicationContext(), "執行methodInService", 0).show();
	}

}

xml 里權限注冊

<service android:name="com.kevin.servicetest.MyService"/>