AndroidStudio定時器AlarmManager在真機測試失效？求助！求解！

在虛擬機上測試很OK，能夠在設置的延時時間產生效果，但是搬到真機就收不到效果，沒有反應！貼代碼！大家幫忙看看~~
AndroidManifest.xml的權限啊，接收器啊都有

 <uses-permission android:name="android.permission.VIBRATE"/>
    <uses-permission android:name="android.permission.WAKE_LOCK"/>
    <uses-permission android:name="android.permission.BIND_DEVICE_ADMIN"
        tools:ignore="ProtectedPermissions" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme" >
        <activity android:name=".activity.ScheduleActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".activity.ScheduleAddActivity"></activity>
        <receiver android:name=".activity.ScheduleAddActivity$AlarmReceiver"
            android:permission="android.permission.BIND_DEVICE_ADMIN">
            <intent-filter>
                <action android:name="com.example.schedule.activity.ScheduleAddActivity.AlarmReceiver"/>
            </intent-filter>
        </receiver>

activity.java的部分關鍵代碼如下

					Intent intent=new Intent(ALARM_EVENT);//鬧鐘服務意圖
	                //用於廣播的延遲意圖，廣播鬧鐘服務
	                PendingIntent pendIntent=PendingIntent.getBroadcast(this,0,intent,PendingIntent.FLAG_UPDATE_CURRENT);
	                AlarmManager alarmManager= (AlarmManager) getSystemService(ALARM_SERVICE);//從系統服務中獲取鬧鐘服務
	                Calendar calendar=Calendar.getInstance();
	                if(alarm_type==6){
   
   //延時提醒,當前時間之後10秒提醒
	                    calendar.setTimeInMillis(System.currentTimeMillis());
	                    calendar.add(Calendar.SECOND,3);//delay_time[alarm_type]
	                }else {
   
   //提前提醒
	                    calendar.set(2021,month,day,hour,minute,0);
	                    calendar.add(Calendar.SECOND,-delay_time[alarm_type]*60);
	                }
	                //設置鬧鐘，1.模式是睡眠狀態下也叫醒，2.延遲時間、3.攜帶的廣播意圖
	                alarmManager.set(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),pendIntent);
	                Log.d("當前時間秒",calendar.getTimeInMillis()+"");

這裏是接收處理代碼

    private String ALARM_EVENT="com.example.schedule.activity.ScheduleAddActivity.AlarmReceiver";
    public static   class AlarmReceiver extends BroadcastReceiver{
   
   
        @Override
        public void onReceive(Context context, Intent intent) {
   
   
            mvibrator.vibrate(3000);
            schedule_date.setText("收到收到");
            Vibrator vibrator= (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
                vibrator.vibrate(3000);//震動3秒
            if(intent!=null){
   
   
                Toast.makeText(context,"alarmreceive!",Toast.LENGTH_LONG).show();
            }
        }
    }

然而最後也沒有收到。。。