Question

我创建了一个小部件并使用AlarmManager进行更新。在我的测试中，更新时间是1秒。代码运行完美。如果将来的更改代码也运行，但将日期更改为过去，则更新将停止工作。有什么解决方案吗？感谢

PendingIntent anIntent=PendingIntent.getBroadcast(context, i, 
    new Intent(WidgetViewsFactory.REFRESH_ACTION),
    PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarmMgr=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmMgr.setRepeating(AlarmManager.ELAPSED_REALTIME, 
    System.currentTimeMillis(), 1000, anIntent);

Answer 1

我终于解决了这个问题。解决方案是创建一个BroadcastReceiver来监听时间或日期变化并生成新的警报。

public class DateChangeReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        for (int i = 0; i < appWidgetIds.length; i++) {
            PendingIntent anIntent = PendingIntent.getBroadcast(context, i, 
                new Intent(WidgetViewsFactory.REFRESH_ACTION),
                PendingIntent.FLAG_UPDATE_CURRENT);
            AlarmManager alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
            alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000, anIntent);
        }
    }
}

并在AndroidManifest.xml中添加以下行：

<receiver android:name=".DateChangeReceiver">
    <intent-filter>
        <action android:name="android.intent.action.TIME_SET"/>
        <action android:name="android.intent.action.DATE_SET"/>
    </intent-filter>
</receiver>

更改日期时找不到AlarmManager

1 个答案: