Android使用bindService作为中间人对象开启服务

Posted 2021-02-05 城南少年与猫

android使用bindService作为中间人对象开启服务

项目结构如下:

MyService:

package com.demo.secondservice;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.widget.Toast;

public class MyService extends Service {
    public MyService() {
    }

    @Override
    public IBinder onBind(Intent intent) {




        return new MyBind();
    }


    public void banZheng(int money) {

        if(money>1000){
            Toast.makeText(getApplicationContext(), "帮你办", Toast.LENGTH_LONG).show();


        }else {

            Toast.makeText(getApplicationContext(), "钱少,不办", Toast.LENGTH_LONG).show();

        }
    }

    //定义中间人
    public class  MyBind extends Binder{

        public  void  callBanZheng(int money){

            //调用办证的方法
            banZheng(money);

        }


    }
}

MainActivity:

package com.demo.secondservice;

import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {
    MyConn myConn;
    MyService.MyBind myBind;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Intent intent = new Intent(MainActivity.this, MyService.class);
//        startService(intent);
        //连接服务
         myConn = new MyConn();
        bindService(intent,myConn,BIND_AUTO_CREATE);
    }

    public void click(View view) {

        //自己new对象 脱离了谷歌框架
//        MyService myService = new MyService();
        myBind.callBanZheng(10200);


    }


    //监视服务的状态
    private  class MyConn implements ServiceConnection{


        //当服务连接成功调用
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {

          myBind = (MyService.MyBind) service;


        }

        //失去连接
        @Override
        public void onServiceDisconnected(ComponentName name) {

        }
    }


    @Override
    protected void onDestroy() {

        //解绑服务
        unbindService(myConn);
        super.onDestroy();
    }
}

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:onClick="click"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="开启服务"
        />

</android.support.constraint.ConstraintLayout>