03_Service binding

The Service started by the Start Service, the Application exits, and the Service will not exit;
When the Service started by Bind Service, the Application exits, and the Service exits.
 
Start Service and Stop Service just start the service and cannot communicate. Only by binding with the service through the Bind Service can it communicate with the service.
 

package com.example.servdemo;



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;

import android.view.View.OnClickListener;

import android.widget.Button;



public class MainActivity extends Activity implements OnClickListener, ServiceConnection {



    private Button btnStartService, btnStopService, btnBindService, btnUnbindService, btnGetCurrentNum;

    private Intent serviceIntent;

    private EchoService echoService = null;

    

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        

        serviceIntent = new Intent(this, EchoService.class);

        

        btnStartService = (Button) findViewById(R.id.btnStartService);

        btnStopService = (Button) findViewById(R.id.btnStopService);

        btnBindService = (Button) findViewById(R.id.btnBindService);

        btnUnbindService = (Button) findViewById(R.id.btnUnbindService);

        btnGetCurrentNum = (Button) findViewById(R.id.btnGetCurrentNum);

        

        btnStartService.setOnClickListener(this);

        btnStopService.setOnClickListener(this);

        btnBindService.setOnClickListener(this);

        btnUnbindService.setOnClickListener(this);

        btnGetCurrentNum.setOnClickListener(this);

    }





    @Override

    public void onClick(View v) {

        

        switch (v.getId()) {

        

        case R.id.btnStartService:

            startService(serviceIntent);

            break;



        case R.id.btnStopService:

            stopService(serviceIntent);

            break;

            

        case R.id.btnBindService:

            bindService(serviceIntent, this, Context.BIND_AUTO_CREATE);

            break;

            

        case R.id.btnUnbindService:

            unbindService(this);

            echoService = null;

            break;

            

        case R.id.btnGetCurrentNum:

            if (echoService != null) {

                System.out.println("The Number is  "+echoService.getCurrentNum());

            }

            break;

        }

    }



    @Override

    public void onServiceConnected(ComponentName name, IBinder binder) {

        System.out.println("onServiceConnected!");

        

        echoService = ( (EchoService.EchoServiceBinder)binder ).getService();

    }



    @Override

    public void onServiceDisconnected(ComponentName name) {

        

    }



}

package com.example.servdemo;



import java.util.Timer;

import java.util.TimerTask;



import android.app.Service;

import android.content.Intent;

import android.os.Binder;

import android.os.IBinder;



public class EchoService extends Service {



    @Override

    public IBinder onBind(Intent intent) {

        System.out.println("onBind!");

        return echoServiceBinder;

    }

    

    private final EchoServiceBinder echoServiceBinder = new EchoServiceBinder();

    

    public class EchoServiceBinder extends Binder{

        public EchoService getService() {

            return EchoService.this;

        }

    }

    

    public int getCurrentNum(){

        return i;

    }

    

    @Override

    public void onCreate() {

        // TODO Auto-generated method stub

        System.out.println("Service Start!");

        startTimer();

        super.onCreate();

    }

    

    @Override

    public void onDestroy() {

        // TODO Auto-generated method stub

        System.out.println("Service Stop!");

        stopTimer();

        super.onDestroy();

    }

    

    private int i = 0;

    

    public void startTimer(){

        if(timer == null){

            timer = new Timer();

            timerTask = new TimerTask() {

                

                @Override

                public void run() {

                    i++;

                    System.out.println(i);

                }

            };

            

            timer.schedule(timerTask, 1000, 1000);

        }

    }

    

    public void stopTimer(){

        if(timer != null){

            timerTask.cancel();

            timer.cancel();

            

            timer = null;

            timerTask = null;

        }

    }

    

    private Timer timer = null;

    private TimerTask timerTask = null;



}