如何仅在 Android 中的特定时间段启用按钮？

Question

I'm working on Android using Java and I have a question.

I want a button to be enabled only during a certain time period. Let's say I want the button to only work between 19:00 and 19:30 and after that it shows a error message, how would I achieve that?

I tried using something like this code, but it didn't work out:

public class LocalTimeDemo {
   public static void main(String[] args) {

      LocalTime time = LocalTime.now();
      LocalTime time1 = LocalTime.parse("12:35:30");
      System.out.println(time1.isBefore(time));  
   }
}

Answer 1

You have to use the calendar class for this. If you want to do it when activity is resumed then use this code snippet in the onResume method of activity

Calendar calendar = Calendar.getInstance();

    int tHour = calendar.get(Calendar.HOUR_OF_DAY);
    int tmin = calendar.get(Calendar.MINUTE);

    if (tHour = 19 && tmin > 0 && tmin<30){
        btn.setEnabled(true);
    }else{
        btn.setEnabled(false);
    }