既然是服务端，我们需要实现接收消息已经处理消息的逻辑代码，所以我们创建一个AidlService，继承Service,因为Service不
能直接接收Callback,但是提供了RemoteCallbackList来注册回调
private RemoteCallbackList callbackList= new RemoteCallbackList();
同时RemoteCallbackList提供了beginBroadcast来获取当前注册的回调数，因此我们可以通过这个方法进行回调处理(再使用
了beginBroadcast之后必须调用finishBroadcast不然会报beginBroadcast() called while already in a broadcast错误)
final int num=callbackList.beginBroadcast();
for (int i=0;i<num;i++){
IAidlCallBack iAidlCallBack=callbackList.getBroadcastItem(i);
iAidlCallBack.onMessageSuccess(message);
}
callbackList.finishBroadcast();
接下来实例化binder对象并返回给客户端，
@Override
public IBinder onBind(Intent intent) {
return binder;
}
private final IAidlInterface.Stub binder=new IAidlInterface.Stub() {
@Override
public void registerCallBack(IAidlCallBack iAidlCallBack) throws RemoteException {
callbackList.register(iAidlCallBack);
}
@Override
public void unregisterCallBack(IAidlCallBack iAidlCallBack) throws RemoteException {
callbackList.unregister(iAidlCallBack);
}
@Override
public void sendMessage(String message) throws RemoteException {
messages.add(message);
final int num=callbackList.beginBroadcast();
for (int i=0;i<num;i++){
IAidlCallBack iAidlCallBack=callbackList.getBroadcastItem(i);
iAidlCallBack.onMessageSuccess(message);
}
callbackList.finishBroadcast();
}
@Override
public List getMessages() throws RemoteException {
return messages;
}
};
在AndroidManifest.xml注册Service
AidlService全部代码
package com.pgc.testaidldemo1;
import android.annotation.SuppressLint;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import androidx.annotation.Nullable;
import java.util.ArrayList;
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