跨应用启动service

package com.example.yabushan.aidsservice;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
//创建一个服务
public class AppService extends Service {
    public AppService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public void onCreate() {
        super.onCreate();
        System.out.println("service on start");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        System.out.println("service deastroy");
    }
}

package com.example.yabushan.anotherapp;

import android.content.ComponentName;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
//另一个app
public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Intent serviceIntent;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        serviceIntent=new Intent();
//传入上边App的包名以及service的类名
        serviceIntent.setComponent(new ComponentName("com.example.yabushan.aidsservice","com.example.yabushan.aidsservice.AppService"));
        findViewById(R.id.startService).setOnClickListener(this);
        findViewById(R.id.stopService).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.startService:

                startService(serviceIntent);
                break;
            case R.id.stopService:
                stopService(serviceIntent);
                break;
        }

    }
}