Android studio跨应用调用service一直没有显示连接。

package com.example.aidlclient;

import androidx.appcompat.app.AppCompatActivity;

import android.app.Service;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.example.aidltest.IMyAidlInterface;

import java.security.Provider;

public class MainActivity extends AppCompatActivity {
private TextView tv;
private Button btn1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv=findViewById(R.id.tv);

            Intent intent = new Intent();
            intent.setPackage("com.example.aidltest");

    intent.setAction("com.example.aidltest.MyService");
            bindService(intent, connection, Service.BIND_AUTO_CREATE);
}

private IMyAidlInterface aidlService;

private ServiceConnection connection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName componentName, IBinder service) {
        tv.setText("50");
        new Thread( new Runnable( )
        {

            @Override
            public void run( ) {

                aidlService = (IMyAidlInterface) IMyAidlInterface.Stub.asInterface(service);
                try {
                    int sum = aidlService.add(10, 50);//对10和50相加
                    Log.d("onServiceConnected", sum + "");
                    tv.setText(sum);
                } catch (RemoteException e) {
                    e.printStackTrace();
                }
            }
            } ).start( );

    }

    @Override
    public void onServiceDisconnected(ComponentName componentName) {

tv.setText("连接断开");
}
};
}

服务端aidltest架构

清单文件： package="com.example.aidltest">
<service
android:name="com.example.aidltest.MyService"

        android:exported="true">
        <intent-filter>
            <action android:name="com.example.aidltest.MyService"></action>
        </intent-filter>
    </service>

客户端aidlclient架构

是不是service没有在清单文件中注册呀

、这是在服务端注册的service：
包名 package="com.example.aidltest"
<service
android:name="com.example.aidltest.MyService"

        android:exported="true">
        <intent-filter>
            <action android:name="com.example.aidltest.MyService"></action>
        </intent-filter>
    </service>