01_25_Service初步（一）

01_25_Service初步（一）

//TestActivity.java
package mars.service1;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class TestActivity extends Activity {
    /** Called when the activity is first created. */
    private Button startServiceButton = null;
    private Button stopServiceButton = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        startServiceButton = (Button) findViewById(R.id.startService);
        startServiceButton.setOnClickListener(new StartServiceListener());
        stopServiceButton = (Button) findViewById(R.id.stopService);
        stopServiceButton.setOnClickListener(new StopServiceListener());
        System.out.println("Activity onCreate");
    }

    class StartServiceListener implements OnClickListener {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setClass(TestActivity.this, FirstService.class);
            startService(intent);
        }
    }

    class StopServiceListener implements OnClickListener {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setClass(TestActivity.this, FirstService.class);
            stopService(intent);
        }
    }
}

//FirstService.java
package mars.service1;

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

public class FirstService extends Service {

    @Override
    public IBinder onBind(Intent intent) {
        System.out.println("Service onBind");
        return null;
    }

    //当创建一个Servcie对象之后，会首先调用这个函数
    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        super.onCreate();
        System.out.println("Service onCreate");
    }

    /*每次启动Service时都调用onStartCommand()方法*/
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        // TODO Auto-generated method stub
        System.out.println("flags--->" + flags);
        System.out.println("startId--->" + startId);
        System.out.println("Service onStartCommand");
        return START_NOT_STICKY;
    }

    /*onDestroy()添加释放资源*/
    @Override
    public void onDestroy() {
        // TODO Auto-generated method stubo
        System.out.println("Service onDestory");
        super.onDestroy();
    }
}

点击StartService按钮->StartService按钮->StopService->StartService按钮->StopService按钮，结果如下
04-10 00:02:34.381: I/System.out(473): Service onCreate
04-10 00:02:34.381: I/System.out(473): flags--->2
04-10 00:02:34.381: I/System.out(473): startId--->1
04-10 00:02:34.381: I/System.out(473): Service onStartCommand
04-10 00:02:40.952: I/System.out(473): flags--->2
04-10 00:02:40.952: I/System.out(473): startId--->2
04-10 00:02:40.952: I/System.out(473): Service onStartCommand
04-10 00:02:45.381: I/System.out(473): Service onDestory
04-10 00:02:46.611: I/System.out(473): Service onCreate
04-10 00:02:46.611: I/System.out(473): flags--->2
04-10 00:02:46.611: I/System.out(473): startId--->1
04-10 00:02:46.611: I/System.out(473): Service onStartCommand
04-10 00:02:48.851: I/System.out(473): Service onDestory