好记性不如烂笔杆android学习笔记<十一> Service的应用

23,//Service的应用
<1>//manifest.xml对service注册
<service android:name=".FirstService"></service>
<2>//Java文件

public class TestActivity extends Activity {
    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.startServiceButton);
        startServiceButton.setOnClickListener(new StartServiceListener());
        stopServiceButton = (Button)findViewById(R.id.stopServiceButton);
        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);
        }
    }
}

 

<3>//创建Service文件

public class FirstService extends Service{
    @Override
    public IBinder onBind(Intent arg0) {
        System.out.println("Service onBind ");
        return null;
    }
    //当创建一个Service对象之后，会先调用这个函数
    @Override
    public void onCreate() {
        super.onCreate();
        System.out.println("Service onCreate ");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        System.out.println("Service onDestory ");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        System.out.println("flags--->" + flags);
        System.out.println("startId--->" + startId);
        System.out.println("Service onStartCommand");
        return START_NOT_STICKY;
    }
    
}