interface ITestCallBack {
 /**
  * Demonstrates some basic types that you can use as parameters
  * and return values in AIDL.
  */
 void onTagValid(in String tag);

}

interface ITestInterface {
 /**
  * Demonstrates some basic types that you can use as parameters
  * and return values in AIDL.
  */
  boolean isTagValid(in String tag);

  void registerCallback(in String tag, in ITestCallBack callback);

  void unRegisterCallback(in String tag, in ITestCallBack callback);
}

//其實(shí)RemoteCallbackList類(lèi)似于java中{@link java.util.Observable}，用來(lái)批量處理接口回調(diào)對(duì)象，
//其實(shí)如果確保只有一個(gè)客戶(hù)端會(huì)bind到這個(gè)服務(wù)，只需要保存一個(gè)IMyAidlInterfaceCallback即可。
//但是如果有多個(gè)，強(qiáng)烈推薦使用其實(shí)RemoteCallbackList

public void callBack() {
 if (mCallBacks == null) {
  return;
 }
 int num = mCallBacks.beginBroadcast();
 for (int i = 0; i < num; i++) {
  try {
   mCallBacks.getBroadcastItem(i).onTagValid("congratulation callback success " + tag);
  } catch (RemoteException e) {
   e.printStackTrace();
  }
 }
 //結(jié)束后一定要使用finsh，否則下次執(zhí)行beginBroadcast會(huì)拋出IllegalStateException異常
 mCallBacks.finishBroadcast();
}

public class TestService extends Service {

 private RemoteCallbackList<ITestCallBack> mCallBacks = new RemoteCallbackList<>();
 private String tag = "hy";

 public TestService() {
 }

 @Override
 public IBinder onBind(Intent intent) {
  // TODO: Return the communication channel to the service.
  return iTestInterface;
 }

 @Override
 public boolean onUnbind(Intent intent) {
  return super.onUnbind(intent);
 }

 ITestInterface.Stub iTestInterface = new ITestInterface.Stub() {
  @Override
  public boolean isTagValid(String tag) throws RemoteException {
   if (tag.equals(TestService.this.tag)) {
    callBack();
    return true;
   }
   return false;
  }

  @Override
  public void registerCallback(String tag, ITestCallBack callback) throws RemoteException {
   if (null != mCallBacks && null != callback) {
    mCallBacks.register(callback);
   }
  }

  @Override
  public void unRegisterCallback(String tag, ITestCallBack callback) throws RemoteException {
   if (null != mCallBacks && null != callback) {
    mCallBacks.unregister(callback);
   }
  }
 };

 public void callBack() {
  if (mCallBacks == null) {
   return;
  }
  int num = mCallBacks.beginBroadcast();
  for (int i = 0; i < num; i++) {
   try {
    mCallBacks.getBroadcastItem(i).onTagValid("congratulation callback success " + tag);
   } catch (RemoteException e) {
    e.printStackTrace();
   }
  }
  mCallBacks.finishBroadcast();
 }
}

public class MainActivity extends AppCompatActivity {

 private String tag = "hy";
 private ITestInterface iTestInterface;
 private ServiceConnection connection = new ServiceConnection() {
  @Override
  public void onServiceConnected(ComponentName name, IBinder service) {
   iTestInterface = ITestInterface.Stub.asInterface(service);
  }

  @Override
  public void onServiceDisconnected(ComponentName name) {
   iTestInterface = null;
  }
 };

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  bindService();
  ((Button) findViewById(R.id.buttonregister)).setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    try {
     iTestInterface.registerCallback(tag, new ITestCallBack.Stub() {
      @Override
      public void onTagValid(String tag) throws RemoteException {
       Log.e("test", "registerCallback: " + tag);
      }
     });
    } catch (RemoteException e) {
     e.printStackTrace();
    }
   }
  });

  ((Button) findViewById(R.id.buttonunregister)).setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    try {
     iTestInterface.unRegisterCallback(tag, new ITestCallBack.Stub() {
      @Override
      public void onTagValid(String tag) throws RemoteException {

      }
     });
    } catch (RemoteException e) {
     e.printStackTrace();
    }
   }
  });

  ((Button) findViewById(R.id.buttonisvalid)).setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    try {
     iTestInterface.isTagValid(tag);
    } catch (RemoteException e) {
     e.printStackTrace();
    }
   }
  });
 }

 private void bindService() {
  Intent intent = new Intent();
  intent.setAction("com.example.heyang.myapplication.TestService");
  intent.setPackage("com.example.heyang.myapplication");
  boolean success = bindService(intent, connection, Context.BIND_AUTO_CREATE);
  if (success) {
   Log.e("test ", "bindService OK");
  } else {
   Log.e("test ", "bindService Fail");
  }
 }

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

 private void unBindeService() {
  try {
   unbindService(connection);
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}