How to pause execution until listener finished?

Question

How to implement pause() and resume() in a way that pause() stops code execution (prevents proceedFurther() from execution) until resume() is called by clicking the button?

button.setOnClickListener(new View.OnClickListener() {
    @Override
     public void onClick(View v) {
         resume();
     }
});
pause();
proceedFurther();

As I understand OnClickListener creates a separeate thread and main thread must be stopped somehow with concurrency-stuff I'm not aware of.

Answer 1

Your assumption is wrong - the code inside the on click listener is executed in the UI thread.

So, to define the task better - you wan't to make sure that proceedFurther() is called only after resume() has been executed.

They are two ways to achieve this:

• If you don't need background processing - resume doesn't touch the database or the network, or other potentially memory - heavy and time consuming stuff, you can just have sequential method calls in the callback:

  public void onClick(View v) {
      resume();
      proceedFurther();
  }
  

• If you do need to execute resume() in a background thread, you can indeed use the AsyncTask. You just need to call resume() in doInBackground() and proceedFurther() in onPostExecute().