question: private int adjustAlpha ( int color , float factor ) { int alpha = Math . round ( Color . alpha ( color ) * factor ) ; int red = Color . red ( color ) ; int green = Color . green ( color ) ; int blue = Color . blue ( color ) ; return Color . argb ( alpha , red , green , blue ) ; }
target:  Transparent the given color by the factor The more the factor closer to zero the more the color gets transparent