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在我的应用程序中，我正在使用警报管理器实现 android 通知，以在特定时间获取通知。我在同一时间成功收到通知，但问题是当我的应用程序处于后台时（通过单击主页按钮），如果发生通知并且用户单击通知，那么它会显示强制关闭错误。

我正在设置这样的通知

public void setRepeatingAlarm(long tym) 
{
    Intent intent = new Intent(this, ReminderService.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
            intent, PendingIntent.FLAG_CANCEL_CURRENT);
    am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
            + tym, 86400000, pendingIntent);
}

and this is my broadcast receiver class

public class ReminderService extends BroadcastReceiver {

NotificationManager nm;
@SuppressWarnings("deprecation")
@Override
public void onReceive(Context context, Intent intent)
{
    Intent intent_view = new Intent(Intent.ACTION_MAIN);
    intent_view.setClass(context.getApplicationContext(), CoachAppActivity.class);

    intent_view.setAction("android.intent.action.MAIN");
    intent_view.addCategory("android.intent.category.LAUNCHER");

    intent_view.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP|Intent.FLAG_ACTIVITY_SINGLE_TOP);
    nm = (NotificationManager) context
            .getSystemService(Context.NOTIFICATION_SERVICE);
    CharSequence from = "Coach App";
    CharSequence message = "View your daily tips.";
    PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
            intent_view, 0);

    Notification notif = new Notification(R.drawable.icon,"View your daily tips.", System.currentTimeMillis());
    notif.setLatestEventInfo(context, from, message, contentIntent);
    notif.flags |= Notification.FLAG_AUTO_CANCEL;
    nm.notify(1, notif);
}

}

在上述代码的帮助下，我收到了用户想要的特定时间的通知。现在我正在更新我的活动类的 onResume() 方法上的 UI 元素，如下所示

public void updateUi(List<ParseObject> objects) 
{
    txtData = (TextView) findViewById(R.id.textView1);
    txt_link1 = (TextView) findViewById(R.id.txt_link1);
    txt_link2 = (TextView) findViewById(R.id.txt_link2);

    txtData.setText(objects.get(0).getString("DailyInfo"));
    SpannableString content1 = new SpannableString(objects.get(0)
            .getString("Title_Hyperlink1"));
    content1.setSpan(new UnderlineSpan(), 0, content1.length(), 0);
    txt_link1.setText(content1);

    SpannableString content2 = new SpannableString(objects.get(0)
            .getString("Title_Hyperlink2"));
    content2.setSpan(new UnderlineSpan(), 0, content2.length(), 0);
    txt_link2.setText(content2);

    link1 = (objects.get(0).getString("Hyperlink1").toString() == null ? ""
            : objects.get(0).getString("Hyperlink1").toString());
    link2 = (objects.get(0).getString("Hyperlink2").toString() == null ? ""
            : objects.get(0).getString("Hyperlink2").toString());
}

当我调试应用程序时，我发现我无法获取 UI 元素的值。如果我通常在不单击通知的情况下启动应用程序，它不会产生任何问题并且应用程序会进入前台。在这种情况下请帮助我，如果有任何混淆，请告诉我。

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