报警管理器未运行?安卓系统

Question

知道为什么我的警报管理器不会运行吗？我已经折腾了几个小时，其中一个正在运行，但另一个没有，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，下面是文档中的一个示例：

<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>