How to change background with day/night time?

Question

In my application I want to change background with Day/Night time.
My mean is I want check time if time is night set night background from drawable and when time is Day set day background from drawable.

Sorry for my bad question, I am an amateur and really need your help.
How can I do it in android?

Answer 1

You can use a code something like this, by specifying the hours you consider in morning and the hours you consider as night.

I considered the time from 06:00 - 18:00 as morning and 18:00 - 05:00 as night. Change it accordingly.

   Calendar calendar = Calendar.getInstance();
   int time = c.get(Calendar.HOUR_OF_DAY);

    if(time >= 6 && time < 18){

    image.setImageResource(R.drawable.morning);     

     }else if (time >= 18 && time < 6){

    image.setImageResource(R.drawable.night);

    }

EDIT

As suggested by @AxelH, it would be better to just specify either one of the time (morning or night only). The code would be something like:

Calendar calendar = Calendar.getInstance();
   int time = c.get(Calendar.HOUR_OF_DAY);

    if(time >= 6 && time < 18){

    image.setImageResource(R.drawable.morning);     

     }else{

    image.setImageResource(R.drawable.night);

    }