Creating an AnimationSet & objectAnimator in Code

Question

Creating an AnimationSet & objectAnimator in Code

Nathan Sokalski 4,111

I am trying to create an AnimationSet in code. I am able to create a static AnimationSet in xml using the set & objectAnimator tags, but I need to do this in code, because I will have a different number of and different values for the objectAnimator tags. I have found AnimationSet & AnimationUtils. My AnimationSet (my set tag if I were to use xml) would always be the same and would have the ordering attribute set to "sequentially". The objectAnimator tags, for which there would be different numbers with different values for the attributes. The attributes that would need to be set are propertyName (which would always be set to "fillColor"), duration, valueFrom & valueTo (valueFrom & valueTo will always be equal, because my goal is to display the color for a fixed amount of time). How can I create a series of objectAnimator(s) and add them to a new AnimationSet?

RedShanks 11 Reputation points

2021-12-20T09:50:07.1+00:00

Animation and objectAnimator both provides constructor method for initialization. Check the threads:
https://stackoverflow.com/questions/38715367/android-set-two-animation-on-view-programmatically
https://stackoverflow.com/questions/36161057/how-to-create-objectanimator-with-valuetype-pathtype-programmatically
Nathan Sokalski 4,111 Reputation points

2021-12-20T20:19:24.293+00:00

I tried that, but the AddAnimation method requires an Animation. However, in the example, the Animations are made from ScaleAnimation & TranslateAnimation, but I am trying to animate the color, and I could not find an Animation that would be used for that.
RedShanks 11 Reputation points

2021-12-21T09:40:30.36+00:00

The Canvas Drawing API allows to control to selectively change colors in a specific part of the picture.
https://learn.microsoft.com/en-us/xamarin/android/app-fundamentals/graphics-and-animation#using-the-canvas-drawing-api
Nathan Sokalski 4,111 Reputation points

2021-12-21T21:14:34.737+00:00

I think I should be using AnimatorSet instead of AnimationSet. However, I am still unable to figure out exactly how to use them. When using a static AnimatedVectorDrawable from XML, I used an ImageView so that I could use scaleType="fitCenter" and assign the drawable to the src property. I would switch to just using a FrameLayout or other type of layout with a background, but that would not allow me to scale it the way ImageView does with scaleType. The fact that I am modifying a Drawable rather than a direct property of a View is confusing me.
RedShanks 11 Reputation points

2021-12-22T09:13:55.787+00:00

You can place the layout and an imageView inside a frameLayout. Display the imageView as background, it's able to change the color of the image.
Check this thread: https://stackoverflow.com/a/33083431/11083277