颜色渐变
/** fraction : 分量
private int evaluate(float fraction, int startValue, int endValue) {
int startInt = startValue;
int startA = (startInt >> 24);
int startR = (startInt >> 16) & 0xff;
int startG = (startInt >> 8) & 0xff;
int startB = startInt & 0xff;
int endInt = endValue;
int endA = (endInt >> 24);
int endR = (endInt >> 16) & 0xff;
int endG = (endInt >> 8) & 0xff;
int endB = endInt & 0xff;
return ((startA + (int) (fraction * (endA - startA))) << 24) | ((startR + (int) (fraction * (endR - startR))) << 16) | ((startG + (int) (fraction * (endG - startG))) << 8)
| ((startB + (int) (fraction * (endB - startB))));
}
获取深色与暗色
private int getDarkColor(int color) {
int red = Color.red(color);
int green = Color.green(color);
int blue = Color.blue(color);
return 0XFF000000 | getOffsetIntValue(red,-20) << 16 | getOffsetIntValue(green,-20) << 8 | getOffsetIntValue(blue,-20);
}
private int getDeepColor(int color) {
int red = Color.red(color);
int green = Color.green(color);
int blue = Color.blue(color);
return 0XFF000000 | getOffsetIntValue(red,20) << 16 | getOffsetIntValue(green,20) << 8 | getOffsetIntValue(blue,20);
}
动态改变 Progress 的颜色
if(Build.VERSION.SDK_INT>= Build.VERSION_CODES.LOLLIPOP){
progressBar.getIndeterminateDrawable().setColorFilter(color, PorterDuff.Mode.SRC_IN);
}
