AsyncTask - How to use a Handler with postDelayed(Runnable, int) inside an AsyncTask?

Issue

I'm trying to write from a BufferedInputStream, I used while statement before and it worked well, but now I want to delay the loop of writing each 250 millisecond. So, I thought about using a Handler with postDelayed.

This was my code using while:

while (count = input.read(data)) > 0){
//File writing...
}

But when I turned it to this:

 new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                try {
                    //File writing...
                } catch (IOException e) {
                }
            }
        }, 250);

I got this RuntimeException:

Can't create handler inside thread that has not called Looper.prepare().

I think, it says that I cant create a handler inside a thread (AsyncTask/Thread), but I hope someone has a workaround for this. Thanks in advance!

Solution

Try calling Thread.sleep() instead of calling postDelayed on a hanler, because inside the doInBackround method you are already in backround thread and there is no issues in calling sleep for a small time interval

  try {
        Thread.sleep(250)   
        //File writing...
  }catch (IOException e) {

      }catch (InterruptedException e) {

      }

`

Answered By - Ramees Thattarath