Are animated androids always within the UI thread?

Question

I would like to clarify the use of view animation, rights, etc. in Android.

I usually create an animation without any tread objects - right in my Activity / Fagment / ViewClass:

AlphaAnimation alphaAnimation = new AlphaAnimation(0,1);
alphaAnimation.setDuration(100);
mView.setAnimation(alphaAnimation);
alphaAnimation.start();

I understand this as an animation running in the main user interface thread.

But if I create an animation inside the workflow, will this be the usual way?

public void onClick(View v) {
  new Thread(new Runnable() {
    public void run() {
      final AlphaAnimation alphaAnimation = new AlphaAnimation(0,1);
      alphaAnimation.setDuration(100);
      mView.post(new Runnable() {
        public void run() {
          mView.setAnimation(alphaAnimation);
          alphaAnimation.start();
        }
      });
    }
  }).start();
}

Answer 1

. mView.post() . , . .

, 16 . . , , .