alarmManager在不等待指定時間的情況下觸發intent

Question

正試圖在指定時間啓動intent以打開wifi，但由於某種原因報警立即觸發。我使用getTimeDifferenceas作爲參數調用setAlarm。我檢查了log.e和getTimeDifference返回的是準確的時間，但它仍然會觸發瞬間

public long getTimeDifference(){ 
    Date current = new Date(); 
    Date future = new Date(); 
    future.setHours(time.getCurrentHour()); 
    future.setMinutes(time.getCurrentMinute()); 
    if((future.getTime() - current.getTime()) < 0){ 
     future.setDate(future.getDate()+1); 
    } 
    return future.getTime() - current.getTime(); 
} 
public void setAlarm(long time){ 
    Intent intent = new Intent(Volume.this,RadioService.class); 
    PendingIntent pendingIntent = pendingIntent = PendingIntent.getService(
      Volume.this, 0, intent, 0); 
    String sd = "time is:" + time; 
    Log.e("time dif", sd); 
    alarm.set(AlarmManager.RTC_WAKEUP, time, pendingIntent); 
} 

Answer 1

RTC_WAKEUP希望在UTC的實際時間，沒有區別。