On 11 Lut, 19:21, momo <[email protected]> wrote:
> hey pskink,
>
> i tried that pure-Handler approach you first suggested, and it works a
> treat - in fact i was able to omit the delay entirely, just
> sendEmptyMessage (and use a simple time keeper class to determine the
> delta) - very smooth, very simple. thanks a lot for your help.
glad to hear it, but if you have 10 minutes or so you could test
Animation based approach
see ViewGroup#drawChild(Canvas canvas, View child, long drawingTime)
what they do is more or less:
Animation a = child.getAnimation();
if (a != null) {
// aha: we are animating the child
more = a.getTransformation(drawingTime, mChildTransformation);
if (more) {
invalidate();
}
}
child.draw(canvas);
if (a != null && !more) {
finishAnimatingView(child, a);
}
so you could do similar thing in your onDraw method:
// no other anims so force cast
MyAnim a = (MyAnim) getAnimation();
if (a != null) {
// we can pass null Transormation: we dont use it in
MyAnim#applyTransformation
more = a.getTransformation(drawingTime, null);
if (more) {
float interpolatedTime = a.mTime;
// draw animation frame based on interpolatedTime
...
}
}
where MyAnim is as follows:
class MyAnim extends Animation {
float mTime;
protected void applyTransformation(float interpolatedTime,
Transformation t) {
mTime = interpolatedTime;
}
}
pskink
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