Execute code right after a fragment becomes visible for the first time

Question

I have a fragment which shows a line chart created with MPAndroidChart. Loading the fragment takes about 200 milliseconds.

I want to improve the perceived app performance by loading the chart data data right after the fragment becomes visible.

Therefore I need to execute code right after the fragment becomes visible, but only the FIRST time it becomes visible.

I can not use onResume(), since it gets called just before the fragment is visible.

Note: I can not use an asynchrounous task, it needs to be done on the UI-thread.

Answer 1

define and override

@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
    super.setUserVisibleHint(isVisibleToUser);

}

then put in onCreateView() function these two lines

      setUserVisibleHint(false);
      setUserVisibleHint(true);

then put the code you wanted to be done at fragment start in onStart() function

@Override
public void onStart() {
    super.onStart();
     //your initial code is here.
}