我有两个计数器存储共享偏好,我需要每天午夜将它们重置为零,我知道我必须使用alarmmanager,但我不知道我该怎么做,我看了SO例子和谷歌文档但无法找到方法。
我拥有的两个计数器存储如下:
SharedPreferences.Editor editor = counters.edit();
editor.putInt("wcounter", wcounter);
editor.commit();
如何在午夜重置它们?
答案 0 :(得分:1)
在代码中的适当位置设置闹钟:
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);
}
在课程和AndroidManifest中添加YourBroadcastReceiver
。
在YourBroadcastReceiver
:
public void onReceive (Context context, Intent intent) {
PreferenceManager.getDefaultSharedPreferences(context)
.edit().remove("wcounter").commit();
}