This article was translated from Japanese by Claude Code.
The android.support.v4.graphics package in Android contains a utility class called ColorUtils.
ColorUtils | Android Developers
In Android app development, this utility class allows you to dynamically blend two colors directly from code.
The blendARGB function takes two Int values representing colors and a float value representing a ratio between 0 and 1 as arguments. The closer to 0, the more the first color is visible. The closer to 1, the more the second color is visible.
By varying this ratio value in sync with View animations, you can dynamically blend colors based on user interactions. For example, using the onPageScrolled callback value of ViewPager allows you to change colors as you navigate between pages.
For specific examples and sample GIFs, check out the sample repository below:
I also presented about ColorUtils at a recent potatotips.
Here are the presentation materials. Check them out too!
Rough summary, but that’s all!