question: protected int makePressColor ( ) { int r = ( this . backgroundColor > > 16 ) & 0xFF ; int g = ( this . backgroundColor > > 8 ) & 0xFF ; int b = ( this . backgroundColor > > 0 ) & 0xFF ; r = ( r - 30 < 0 ) ? 0 : r - 30 ; g = ( g - 30 < 0 ) ? 0 : g - 30 ; b = ( b - 30 < 0 ) ? 0 : b - 30 ; return Color . rgb ( r , g , b ) ; }
target:  Make a dark color to ripple effect