如何使无的Andr​​oid新类一个简单的计时器？ [英] How to make a simple timer without new class in Android?

问题描述

我在开发Android服务，必须在后台运行，执行一个函数中的每个100秒。这就是源$ C ​​$ C（例如）

I'm developing a Service for Android, that must run in background, executing a function each 100 seconds. That's the source code (example)

package com.example

import ....

public class Servizio extends Service {

    public IBinder onBind(Intent intent) {

    }

    public void onCreate() {

    }

    public void onDestroy() {

    //here put the code that stop the timer cycle

    }

    public void onStart(Intent intent, int startid) {

    //i want to begin here the timercycle that each 100 s call myCycle()

    }

    public void myCycle() {

    //code that i can't move on other class!!!

    }

}

我怎样才能做到这一点？现在，该服务执行myCycle（）只是一个时间，东阳我把通话中在onStart（）。

How I can do that? Now the service execute myCycle() just one time, beacause I put a calling in onStart().

推荐答案

使用一个定时器与的TimerTask 的。要执行你的方法每隔100秒，你可以用你的在onStart 方法如下。请注意，此方法创建一个新的线程。

Use a Timer with a TimerTask. To execute your method every 100 seconds, you can use the following in your onStart method. Be aware that this method creates a new thread.

new Timer().schedule(new TimerTask() {
     @Override
     public void run() {
         myCycle();
     }
}, 0, 100000);

另外，使用 android.os.Handler 这篇文章中所述：<一HREF =htt​​p://developer.android.com/resources/articles/timed-ui-updates.html>从定时器更新UI。它比定时器更好，因为它在主线程运行，避免第二线程的开销

Alternatively, use an android.os.Handler as described in this article: Updating the UI from a Timer. It is better than a Timer because it runs in the main thread, avoiding the overhead of a second thread.

private Handler handler = new Handler();
Runnable task = new Runnable() {
    @Override
    public void run() {
        myCycle();
        handler.postDelayed(this, 100000);
    }
};
handler.removeCallbacks(task);
handler.post(task);

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