animations

[Chris Blume]

I have a STITCHed listview where one element is supposed to be an animation.

It is a loading indicator. Once loaded, I populate an ArrayListObservable and hide the animation.

At least, that was the idea.

For normal animations, I need to get access to the drawable (normally by findViewById) and call .start() on that AnimationDrawable.
But I'm not sure I am able to use findViewById to get the element inside this listview, can I?

How do you suggest I have an animated item inside the listview?

Thanks!

[Andy Tsui]

Auto start animation is not yet implemented. But I think it's achievable, please refer to the AFTERCOMMAND to how to trigger the animation:

https://github.com/gueei/AndroidBinding/blob/master/Core/AndroidBinding/src/gueei/binding/converters/AFTERCOMMAND.java

Andy

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[Chris Blume]

I appreciate the help.

I'm not sure I follow. I'm unsure how to have an AFTERCOMMAND auto-fire.
Additionally, is this only for those transition-type animations like the nods and shakes? I am looking for something for the animation-list so my loading indicator can show its spinning animation.

(PS I apologize for double-posting two questions. I had checked back and was under the impression they didn't get sent for some reason. I had asked from another email address.)

Thanks again.

[Andy Tsui]

I have to apologize that Animation is not full documented and developed (mainly due to lack of feedback from users :)

Currently, the binding:animation will make something I called "animation trigger" which contains a "fire" method. I am thinking a custom converter, which auto trigger the "fire" when it is created, could make what you needed. 

Andy

[Chris Blume]

I will research the custom converter triggering the fire when created....but I will do it once I get home tonight.

Would that be fairly well documented? Is it something you could provide a quick snippet for and I can figure out the rest? (IE just point me in the right direction? Is "custom converter" + "fire method" enough pointing?)

Thanks again for everything. A-B is really great and I'm glad you're here, helping us all with it.

[Andy Tsui]

I think animation trigger is the key. 

Yeah, if I have time I will write more articles/documents on those. 

[Andy Tsui]

Hi,

I haven't experiment if this works, but I think you may modify this:

https://github.com/gueei/AndroidBinding/blob/cccf80fec9394611c5b43aea2063b5ea9f86eae5/Core/AndroidBinding/src/gueei/binding/converters/AFTERCOMMAND.java

in the calculateValue method:

@Override
	public AnimationTrigger calculateValue(Object... args) throws Exception {

		if (args.length<2) return null;

		if (!(args[0] instanceof Integer)){

			return null;

		}
		mTrigger.setAnimationId((Integer)args[0]);

		mTrigger.notifyAnimationFire();


		return mTrigger;

	}



It should fire the animation automatically once it is binded to the view. 

[Chris Blume]

I don't understand how to use AFTERCOMMAND for an onLoad-type event.
But I found a work-around.
It is a bad work-around...it isn't very cool...but it at least works.

I have this:

public class LoadingIndicatorModel {

public final Observable LoadingImage = new Observable(Drawable.class);

private final int TOTAL_STEPS = 16;

private Thread LoadingThread;

public LoadingIndicatorModel(final Activity context) {

LoadingThread = new Thread(new Runnable() {

private int Step;

@Override

public void run() {

Step = 0;

while (context != null) {

try {

updateLoadingImage(context, getImageId(Step));

Step++;

if (Step == TOTAL_STEPS) {

Step = 0;

}

Thread.sleep(40);

} catch (InterruptedException e) {}

}

}

});

LoadingThread.start();

}

private int getImageId(int stepNumber) {

switch (stepNumber) {

case 0:

return R.drawable.load01;

case 1:

return R.drawable.load02;

case 2:

return R.drawable.load03;

case 3:

return R.drawable.load04;

case 4:

return R.drawable.load05;

case 5:

return R.drawable.load06;

case 6:

return R.drawable.load07;

case 7:

return R.drawable.load08;

case 8:

return R.drawable.load09;

case 9:

return R.drawable.load10;

case 10:

return R.drawable.load11;

case 11:

return R.drawable.load12;

case 12:

return R.drawable.load13;

case 13:

return R.drawable.load14;

case 14:

return R.drawable.load15;

default:

return R.drawable.load16;

}

}

private void updateLoadingImage(final Activity context, final int drawableId) {

context.runOnUiThread(new Runnable() {

@Override

public void run() {

LoadingImage.set(drawableId);

}

});

}

}

That lets me add an item to the list view via STITCHing and animate them. But it requires creating a thread and posting to the UI thread and...it's just not the preferred method. It basically mimics an animation-list and AnimationDrawable.start()

I would prefer to use the animation-list and be able to call AnimationDrawable.start(). Does the AFTERCOMMAND give me the ImageView somehow? I need to 1.) get access to the ImageView, and 2.) be able to trigger it when created/displayed

[Andy Tsui]

no, Converter cannot directly get the ImageView. 

I am thinking a custom ViewAttribute would be much better, and it can give you access to ImageView

Andy