如何在android中检查颜色亮度？

Question

如何在android中检查亮度？

我有一个整数值的颜色.我想检查这个颜色是深色或浅色基于整数值的颜色.

if (checkColor == Color.RED || checkColor == Color.BLACK) {

    //set fore color is white

} else {

    //set fore color is black
}

而不是上面的代码,我想改变

if (!isBrightColor(checkColor)) {

    //set fore color is white

} else {

    //set fore color is black
}

private boolean isBrightColor(int checkColor){

    boolean rtnValue;

    //How to check this color is bright or dark

    return rtnValue;

}

Answer 1

你应该试试这个....

public static boolean isBrightColor(int color) {
    if (android.R.color.transparent == color)
        return true;

    boolean rtnValue = false;

    int[] rgb = { Color.red(color), Color.green(color), Color.blue(color) };

    int brightness = (int) Math.sqrt(rgb[0] * rgb[0] * .241 + rgb[1]
            * rgb[1] * .691 + rgb[2] * rgb[2] * .068);

    // color is light
    if (brightness >= 200) {
        rtnValue = true;           
    }

    return rtnValue;
}

参考: Android/Java:确定文本颜色是否会与背景混合？