I'm trying to make one of these animations where an image "fades in" with
tiles. (Note: I need this to work from Api 8)
To do that, I created a black grid and put it on top of the image and using
a handler, make each cell dissapear.
It works but the animation takes a bit more than 1 second, even when I post
to the handler without any delay. This looks laggy and strange. The effect
has to be very quick.
I tried many things - using programmatically generated linearlayout with
rows instead of grid, using fade out animation, using no animation at all,
toggling visibility with View.GONE, or View.INVISIBLE, or just setting the
background color to 0x00000000. Nothing helps, I can't make the animation
quicker.
I tested in 2.3 smartphone, in 4.2 smartphone and 4.2 tablet, all look the
same. Well, in the 4.2 devices, the animation sometimes doesn't show at all
- like it was executed already. But when it's visible, it's slow.
Any advice on this? Or do I have to use a completly different approach? Is
there a library to do this kind of effects, maybe?
Here is my relevant code:
List<Integer> done = new ArrayList<Integer>();
private Handler handler = new Handler();
private Runnable fadeInRunnable = new Runnable() {
@Override
public void run() {
if (!done.isEmpty()) {
// int index = (int)(Math.random() * done.size());
int index = 0;
int itemIndex = done.get(index);
int rowIndex = (int)Math.floor(itemIndex / ROWS);
ViewGroup row = (ViewGroup)imageMask.getChildAt(rowIndex);
View child = row.getChildAt(itemIndex - (rowIndex * ROWS));
//
child.startAnimation(AnimationUtils.loadAnimation(getActivity(),
R.anim.fade_out_short));
// child.startAnimation(anim);
child.setBackgroundColor(0x00000000);
// child.setVisibility(View.INVISIBLE);
done.remove(index);
handler.post(this);
// handler.postDelayed(this, 1);
}
}
};
Thanks in advance,
Ivan
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