在指定的时间与alarmmanager重置共享preference [英] Reset a sharedpreference at a specified time with alarmmanager

问题描述

我有存储共享preferences两个柜台，我需要在午夜其重置为零每天，我知道我必须使用alarmmanager，但我真的不知道我是如何做到这一点，我看着SO exemples并在谷歌文档，但无法找到一个方法来做到这一点。

I have two counters stored with sharedpreferences and I need to reset them to zero everyday at midnight, I know I have to use alarmmanager but I don't really know how I have to do it, I looked at SO exemples and on the google documentation but can't find a way to do it.

两个计数器我已经存储这样的：

the two counters I have are stored like this:

共享preferences.Editor编辑= counters.edit（）;
 editor.putInt（wcounter，wcounter）;
 editor.commit（）;

我怎么能在午夜进行重置？

how can I reset them at midnight?

推荐答案

设置适当的地方报警在code：

Set the alarm somewhere appropriate in your code:

private void schedAlarm(Context context) {
    Calendar cal = Calendar.getInstace();
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);
    cal.add(Calendar.DAY_OF_MONTH, 1);
    PendingIntent pi = PendingIntent.getBroadcast(context, 0, new Intent(context, YourBroadcastReceiver.class), PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 1000*60*60*24, pi);
}

添加 YourBroadcastReceiver 作为类和AndroidManifest。
在 YourBroadcastReceiver ：

Add YourBroadcastReceiver as class and in AndroidManifest. In YourBroadcastReceiver:

public void onReceive (Context context, Intent intent) {
    PreferenceManager.getDefaultSharedPreferences(context)
        .edit().remove("wcounter").commit();
}

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