service的使用

package com.example.yabushan.hello3;

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

//服务类
public class MyService extends Service {
    public MyService() {

    }
    @Override
    public IBinder onBind(Intent intent) {
        System.out.println("服务绑定");
        return new Binder();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        new Thread(){
            @Override
            public void run() {
                super.run();
                while (true){
                    System.out.println("服务启动");
                    try {
                        sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }.start();

        return super.onStartCommand(intent, flags, startId);
    }

}

package com.example.yabushan.hello3;

import android.app.Activity;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.view.View;


public class MainActivity extends Activity implements View.OnClickListener, ServiceConnection {

    Intent intent;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_layout);
        intent=new Intent(MainActivity.this,MyService.class);
                findViewById(R.id.startService).setOnClickListener(this);
                findViewById(R.id.stopService).setOnClickListener(this);
                findViewById(R.id.bindService).setOnClickListener(this);
                findViewById(R.id.unbindService).setOnClickListener(this);

        }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.startService:
                startService(intent);break;
            case R.id.stopService:
                stopService(intent);break;
            case R.id.bindService://绑定服务需要实现下面的两个方法
                bindService(intent,this, Context.BIND_AUTO_CREATE);
            case R.id.unbindService:
                unbindService(this);


        }

    }
   
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        System.out.println("服务绑定成功");

    }

    @Override
    public void onServiceDisconnected(ComponentName name) {

    }
}