我正在構建一個讓用戶選擇困難的健身房應用程序。難度根據時間設置，用戶查看難度后點擊健身房姿勢。時間將根據困難運行，如果時間用完，將觸發警報。但在我的條件下，時間用完后警報不會觸發。我已經在清單中添加了接收器 android:name。這是我的代碼： private void saveAlarm(boolean checked) { if (checked) { AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); Intent alarmIntent; PendingIntent pendingIntent; int Hour, Minute; alarmIntent = new Intent(Setting.this, AlarmNotificationReceiver.class); pendingIntent = PendingIntent.getBroadcast(this, 0, alarmIntent, 0); if (Build.VERSION.SDK_INT >= 23) { Hour = timePicker.getHour(); Minute = timePicker.getMinute(); } else { Minute = timePicker.getCurrentMinute(); Hour = timePicker.getCurrentHour(); } Date dat = new Date(); Calendar cal_alarm = Calendar.getInstance(); Calendar cal_now = Calendar.getInstance(); cal_now.setTime(dat); cal_alarm.setTime(dat); cal_alarm.set(Calendar.HOUR_OF_DAY, Hour); cal_alarm.set(Calendar.MINUTE, Minute); cal_alarm.set(Calendar.SECOND, 10); if (cal_alarm.before(cal_now)) { cal_alarm.add(Calendar.DATE, 1); } alarmManager.set(AlarmManager.RTC_WAKEUP, cal_alarm.getTimeInMillis(), pendingIntent); }}
1 回答
慕斯王
TA貢獻1864條經驗 獲得超2個贊
在 AndroidManifest.xml 中像這樣注冊你的接收器
<receiver
android:name="com.example.AlarmNotificationReceiver"
android:enabled="true"
android:exported="false">
<intent-filter>
<action android:name="com.example.AlarmNotificationReceiver" />
</intent-filter>
</receiver>
像這樣設置你的意圖并像這樣設置警報：
Intent intent = Intent();
intent.setClass(context,AlarmNotificationReceiver.class);
intent.setAction("com.example.AlarmNotificationReceiver");
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setExact(AlarmManager.RTC_WAKEUP, cal_alarm.getTimeInMillis(), pendingIntent);
setExact在設置的確切時間被調用。
請注意，在 Android Oreo 中，通知需要顯示通知渠道。
像這樣創建通知通道：
NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
NotificationChannel channel = new NotificationChannel("default","Default",NotificationManager.IMPORTANCE_DEFAULT);
manager.createNotificationChannel(channel);
}
像這樣創建通知：
Notification notification = new NotificationCompat.Builder(context, "default")
.setDefaults(Notification.DEFAULT_ALL)
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.mipmap.ic_launcher_round)
.setContentTitle("It's time")
.setContentText("Time to training")
.setContentInfo("Info")
.build();
manager.notify(1, notification);
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