在android系统中每3秒显示通知 [英] show notification in every 3 sec in android

问题描述

我要创建我的应用程序，每3秒造成在通知中的一项服务。我创建这个code，但它的工作只有一个，当我启动我的应用程序的时间。我想在每3秒获得通知！甚至当我关闭我的应用程序，我得到通知！ （因为这个我创建的服务）
请帮助我。

I want create a service within my app that every 3 sec creates a notification. i create this code but it works only one time when i launch my app. i want get notification in every 3 sec!! even when i close my app i get notifications!! ( because of this i create service) please help me.

public class notifService extends Service {
ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
private static final int HELLO_ID = 1;

@Override
public IBinder onBind(Intent arg0) {
    return null;
}

@Override
public void onStart(Intent intent, int startId) {
    super.onStart(intent, startId);
    final Intent intent1 = new Intent(this, notifService.class);

    scheduler.schedule(new Runnable() {
        @Override
        public void run() {
            // Look up the notification manager server
            NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

            // Create your notification
            int icon = R.drawable.fifi;
            CharSequence tickerText = "Hello";
            long when = System.currentTimeMillis();
            Notification notification = new Notification(icon, tickerText,when);
            Context context = getApplicationContext();
            CharSequence contentTitle = "My notification";
            CharSequence contentText = "Hello World!";
            PendingIntent pIntent = PendingIntent.getActivity(notifService.this, 0, intent1, 0);
            notification.setLatestEventInfo(context, contentTitle,contentText, pIntent);
            // Send the notification
            nm.notify(HELLO_ID, notification);
        }
    }, 3, SECONDS);
}

@Override
public void onDestroy() {
    super.onDestroy();
}

}

推荐答案

的进度你使用的方法的执行一次性行动的。

The schedule method you're using executes a one-shot action.

您需要使用<一个href=\"http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ScheduledExecutorService.html#scheduleWithFixedDelay%28java.lang.Runnable,%20long,%20long,%20java.util.concurrent.TimeUnit%29\"相对=nofollow> ScheduledExecutorService.scheduleWithFixedDelay ：

You need to use ScheduledExecutorService.scheduleWithFixedDelay:

创建并执行在首次启用的定期操作
  给定的初始延迟后，并且随后用给定的延迟
  一个执行的终止和的开始之间
  下一个。

Creates and executes a periodic action that becomes enabled first after the given initial delay, and subsequently with the given delay between the termination of one execution and the commencement of the next.

试试这个：

scheduler.scheduleWithFixedDelay(new Runnable() {
        @Override
        public void run() {
          // your code
        }
    }, 3, 3, SECONDS);

请注意额外的 3 在方法调用，因为这方法预计四个参数。

Note the extra 3 in the method call as this methods expects four arguments.

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