警报管理器未运行？ Android

Question

任何想法为何我的警报管理器将无法运行？我已经摆弄了几个小时，其中一个正在运行，但另一个没有运行，我找不到解决方案。

Calendar cur_cal = new GregorianCalendar();
cur_cal.setTimeInMillis(System.currentTimeMillis());//set the current time and date for this calendar

Calendar cal = new GregorianCalendar();
cal.add(Calendar.DAY_OF_YEAR, cur_cal.get(Calendar.DAY_OF_YEAR));
cal.set(Calendar.HOUR_OF_DAY, startHours);
cal.set(Calendar.MINUTE, startMinutes);
cal.set(Calendar.DATE, cur_cal.get(Calendar.DATE));
cal.set(Calendar.MONTH, cur_cal.get(Calendar.MONTH));

AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Intent intent = new Intent(WelcomeScreen.this, DNDAlarm.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(WelcomeScreen.this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 86400000, pendingIntent);

Answer 1

您必须在清单文件中声明广播接收器，这是来自文档的示例：

<receiver android:name=".MyBroadcastReceiver"  android:exported="true">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED"/>
        <action android:name="android.intent.action.INPUT_METHOD_CHANGED" />
    </intent-filter>
</receiver>