hexColorShader

hexColorShader

/**
 * hexColorShader
 *
 * Pass in a hex int ARGB, and your hex value will be lightened or
 * darkened.
 *
 * NOTE: We assume you pass in ARGB because this is what Android converts
 * it to. This method would be better if it checked the length of the
 * hex string first, to see if it is ARGB or RGB.
 *
 * Percent expects decimal representation (eg 0.5 for 50%)
 * Negative percent will darken the original value
 * Positive percent will lighten the original value
 *
 * Hex int RGB is returned
 *
 */
private int hexColorShader(int colorInt, Double percent){
    String color = Integer.toHexString(colorInt);

    Integer rInt = Integer.parseInt(color.substring(2,4), 16);
    Integer gInt = Integer.parseInt(color.substring(4,6), 16);
    Integer bInt = Integer.parseInt(color.substring(6,8), 16);

    Double rDouble = rInt + (rInt * percent);
    rInt = rDouble.intValue();

    Double gDouble = gInt + (gInt * percent);
    gInt = gDouble.intValue();

    Double bDouble = bInt + (bInt * percent);
    bInt = bDouble.intValue();

    rInt = (rInt<255) ? rInt : 255;
    gInt = (gInt<255) ? gInt : 255;
    bInt = (bInt<255) ? bInt : 255;

    String rString = Integer.toHexString(rInt);
    if(rString.length()==1) {
        rString = "0" + rString;
    }

    String gString = Integer.toHexString(gInt);
    if(gString.length()==1) {
        gString = "0" + gString;
    }

    String bString = Integer.toHexString(bInt);
    if(bString.length()==1) {
        bString = "0" + bString;
    }

    String finalColor = rString + gString + bString;
    Log.d("KIO", "Original Color: " + colorInt);
    Log.d("KIO", "Final Color: " + finalColor);
    return Integer.parseInt(finalColor, 16);
}