Android Question Animate the flipping of a Label

thedesolatesoul

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I will find this hard to explain.
I am trying to figure out a way to animate a label / textview (rotate across the z-axis). i.e. like it is flipping around.
To be honest, if you flip it on any axis, I am sure the code can be changed to adapt to any axis.
What I am after is I want to flip it around, and at the point where the rotation rotates the text completely out of view i.e. width = 0, then I will change the text, and the next text will animate into view.
Any ideas?
 

eps

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Would it be easier to squeeze the text to zero width and then expand the new text?

Although I'm still not quite so sure how you'd do that, but I guess if you held it in a panel and reduced the width of the panel to zero and then re-expanded it again it would be quite similar?
 
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thedesolatesoul

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In my case I was thinking of height, but same concept.
I could use the ScaleAnimation to do that, but it is not the same. The illusion of flipping comes due to a skew in text size, i.e. one side of the text is coming towards you. This means the text height/width of individual charachters will be changing along the axis.
 
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mc73

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You can use a canvas and transformation formulae for this. I guess it may be slow, so another option is to do this letter by letter, by adjusting h/w/ts in order to give the impression of an accurate transformation.
 
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thedesolatesoul

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Informatix

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I will find this hard to explain.
I am trying to figure out a way to animate a label / textview (rotate across the z-axis). i.e. like it is flipping around.
To be honest, if you flip it on any axis, I am sure the code can be changed to adapt to any axis.
What I am after is I want to flip it around, and at the point where the rotation rotates the text completely out of view i.e. width = 0, then I will change the text, and the next text will animate into view.
Any ideas?
Why don't you use my NineOldAndroid library? One of the demos shows a label rotating in 3D.
 
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thedesolatesoul

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Informatix

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The answer to that will be, that I forgot about that library as I hadnt tried it!
I would try it (and maybe I will have to), but currently I have found an easier solution with @LonelyStar library here: http://www.basic4ppc.com/android/fo...dview-is-new-for-animation.16684/#post-116668
I have issues with ICOSFlip3DView on some devices as you can see on this screenshot (on the device, with the animation, it's worse):
flip3d.png

Don't ask me why. I don't know. It seems that's more a problem with the lib than with the devices.
 
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eps

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In my case I was thinking of height, but same concept.
I could use the ScaleAnimation to do that, but it is not the same. The illusion of flipping comes due to a skew in text size, i.e. one side of the text is coming towards you. This means the text height/width of individual charachters will be changing along the axis.

You are correct, of course. I guess we'll have to wait and see if you get any luck with the nineoldandroid lib!
 
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thedesolatesoul

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I knew about the Tween library but thought it would be overkill for such a small animation.
Anyway, I have got it working with NineoldAndroids with as minimum code, I hope.
I do realize that both Tween and NineOldAndroid are very similar in the way that you need to select a property and animate values against it.

Performance wise I do not know which would be better.
 
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Informatix

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Performance wise I do not know which would be better.

I never really tried the Tween library, so I have no idea. One of the major difference that I know is that NOA runs with any Android version. The Tween lib needs Honeycomb or +.
 
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Informatix

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Is your NineOldAndroid library publicly available or only as part of your ULV?
It depends. It was given as a promotional offer last year with ULV. Now, I give it only to generous donors. Maybe, in a near future, I will give it with each copy of AnimationPlus.
 
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eps

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Cheers both :)

I like the idea of keeping Apps as inclusive as possible, although there only seems to be a bit of interest around Android v 2 - 2.3 anything before that seems to have dropped like a stone to almost nil.
 
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