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);
}

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 ) ; }
make a dark color to ripple effect
