Because it's a lot of work to perform in software: you are compositing
a fullscreen scaled and translucent bitmap. Android does not offer 2D
hardware acceleration yet, so this kind of animation is expensive.
On Tue, Nov 11, 2008 at 2:29 PM, Rohit Mordani <[EMAIL PROTECTED]> wrote:
>
> Is there a particular reason as to why it will be slow? I have a grid
> of only 6 images (each image (png) is about 40Kb).
>
> Rohit
>
>
> On Nov 11, 2:00 pm, Romain Guy <[EMAIL PROTECTED]> wrote:
>> It depends on the rest of your UI. But if you're animating a
>> fullscreen GridView, it's gonna be slow on the G1 (unfortunately.)
>>
>>
>>
>> On Tue, Nov 11, 2008 at 1:27 PM, Rohit Mordani <[EMAIL PROTECTED]> wrote:
>>
>> > Hmmm...ok - I thought that it might be trying to set the view to
>> > invisible while the animation is going on and that might cause some
>> > choppiness. You're saying that that is not the case? How can I make
>> > the animation smoother and snappier?
>>
>> > Rohit
>>
>> > On Nov 11, 1:18 pm, Romain Guy <[EMAIL PROTECTED]> wrote:
>> >> Actually the way you did it earlier is simpler and is meant to work.
>> >> No need for a listener.
>>
>> >> On Tue, Nov 11, 2008 at 1:14 PM, Rohit Mordani <[EMAIL PROTECTED]> wrote:
>>
>> >> > I moved to using an AnimationListener to make the view invisible at
>> >> > the end of the animation. That seems more correct now but it still
>> >> > doesn't improve the speed or smoothness (yes - i want to know how to
>> >> > do that too) of the animation.
>>
>> >> > Here is my listener :
>>
>> >> > class TestAnimListener implements AnimationListener {
>> >> > @Override
>> >> > public void onAnimationEnd(Animation arg0) {
>> >> > // TODO Auto-generated method stub
>> >> > gv.setVisibility(View.INVISIBLE);
>> >> > }
>>
>> >> > @Override
>> >> > public void onAnimationRepeat(Animation animation) {
>> >> > // TODO Auto-generated method stub
>>
>> >> > }
>>
>> >> > @Override
>> >> > public void onAnimationStart(Animation arg0) {
>> >> > // TODO Auto-generated method stub
>>
>> >> > }
>> >> > }
>>
>> >> > and I set it on the animation as follows:
>>
>> >> > a.setAnimationListener(new TestAnimListener());
>>
>> >> > Rohit
>>
>> >> > On Nov 11, 1:01 pm, Rohit Mordani <[EMAIL PROTECTED]> wrote:
>> >> >> I have a Grid View and it has 6 jpeg images. I am applying a scale and
>> >> >> alpha animation to that grid and then at the end of the animation i
>> >> >> set the visibility of that view to invisible. The animation seems
>> >> >> slow. I tried to use an AccelerateInterpolator but that doesnt seem to
>> >> >> help. Is there a way to speed up the animation? Here is what my
>> >> >> animation looks like (testanim.xml)
>>
>> >> >> <?xml version="1.0" encoding="utf-8"?>
>> >> >> <set xmlns:android="http://schemas.android.com/apk/res/android";>
>>
>> >> >> <alpha android:fromAlpha="0.2" android:toAlpha="1.0"
>> >> >> android:duration="300" />
>>
>> >> >> <scale android:duration="300" android:fillAfter="true"
>> >> >> android:fromXScale="1.75" android:toXScale="1"
>> >> >> android:fromYScale="1.75" android:toYScale="1"
>> >> >> android:pivotX="50%" android:pivotY="50%" />
>>
>> >> >> </set>
>>
>> >> >> I load this animation in java as follows....
>>
>> >> >> GridView gv = (GridView) findViewById(R.id.grid);
>> >> >> Animation a = AnimationUtils.loadAnimation(this, R.anim.testanim);
>> >> >> a.setInterpolator(new LinearInterpolator());
>> >> >> gv.startAnimation(a);
>> >> >> gv.setVisibility(View.INVISIBLE);
>>
>> >> >> any ideas what I need to do to speed up the animation?
>>
>> >> --
>> >> Romain Guywww.curious-creature.org
>>
>> --
>> Romain Guywww.curious-creature.org
> >
>
--
Romain Guy
www.curious-creature.org
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