android color between two colors, based on percentage?

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You can try using ArgbEvaluator class from android API: http://developer.android.com/reference/android/animation/ArgbEvaluator.html :

new ArgbEvaluator().evaluate(0.75, 0x00ff00, 0xff0000);

Note that there is a bug ( http://code.google.com/p/android/issues/detail?id=36158 ) in alpha channel calculation so you should use values without alpha value.

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