Question

I have quiz app. When someone click correct answer, then Button should change color for green and after that I want load new question(I have it in ListArray). It’s important: App should wait to the end of animation(in this moment all buttons are disabled) and after that load next question.

Could anybody give me a hint how to do this?

Answer 1

You can use a Handler to post after the animation is done. If your animation is 3 seconds, you’d do it like so.

Handler mHandler = new Handler();
Runnable codeToRun = new Runnable() {
    @Override
    public void run() {
        loadNewQuestion();
    };
mHandler.postDelayed(codeToRun, 3000); //Runs the runnable on the UI thread after 3 sec

Or you can set an animation listener (Handlers are better)

Animation myAnim = AnimationUtils.loadAnimation(context, R.anim.my_anim);
Runnable codeToRun = new Runnable() {
    @Override
    public void run() {
        loadNewQuestion();
    }
};
AnimationListener myAnimationListener = new AnimationListener() {
    @Override
    public void onAnimationEnd(Animation animation) {
        runOnUiThread(codeToRun);
    }
};
myAnim.setAnimationListener(myAnimationListener);
button.startAnimation(myAnim);