033 Android 绑定Service并与之通信

1.绑定service

2.实现方法

3.在Androidmanifest.xml文件中配置service

<service android:name=".Myservice"></service>

4.java后台

MainActivity界面

package com.lucky.test38service2;

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;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    Button button_setbind;
    Button button_unsetbind;
    Button button_getvalue;
    Button button_clear;
    Intent intent;
    Myservice.Mybind mybind;       //定义一个Mybind
    ServiceConnection connection;  //定义一个ServiceConnection

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button_setbind=findViewById(R.id.button_setbind);
        button_unsetbind=findViewById(R.id.button_unsetbind);
        button_getvalue=findViewById(R.id.button_getvalue);
        button_clear=findViewById(R.id.button_clear);
        intent=new Intent(MainActivity.this,Myservice.class);

        //ServiceConnection 建立service连接
        connection=new ServiceConnection() {
            @Override
            public void onServiceConnected(ComponentName name, IBinder service) {
                mybind= (Myservice.Mybind) service;  //利用mybind作为MainActivity与Myservice信息交互的桥梁
            }

            @Override
            public void onServiceDisconnected(ComponentName name) {

            }
        };

        button_setbind.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                bindService(intent,connection,BIND_AUTO_CREATE); //绑定service
            }
        });
        button_unsetbind.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                unbindService(connection);  //解除service
            }
        });
        button_getvalue.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //显示service内容
                Toast.makeText(MainActivity.this,mybind.getCount()+"",Toast.LENGTH_SHORT).show();
            }
        });
        button_clear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mybind.setCount(0);  //设置count值
            }
        });
    }
}

Myservice

package com.lucky.test38service2;

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

public class Myservice extends Service {

    boolean flag1;
    int count;

    //新建绑定工具类,绑定count
    public class Mybind extends Binder{
        //获取count值
        public int getCount(){
            return count;
        }

        //设置count值
        public void setCount(int arg){
            count=arg;
        }
    }

    Mybind mybind=new Mybind();

    @Override
    public IBinder onBind(Intent intent) {
        return mybind;
    }

    //service创建时调用的方法
    @Override
    public void onCreate() {
        super.onCreate();
        flag1=true;
        new Thread(){
            @Override
            public void run() {
                while (flag1){
                    try {
                        Thread.sleep(1000);  //延时线程
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    count++;
                }
            }
        }.start();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        flag1=false;
    }


}