A simple color picker, supports horizontal and vertical
<!--the color picker direction like LinearLayout orientation vertical or horizontal-->
app:pickerOrientation="vertical"
<!--the color picker thumb drawable-->
app:pickerThumbDrawable="@drawable/ic_circle_purple_24dp"
<!--the color picker height-->
app:pickerHeight="5dp"
<!--the color picker round corner-->
app:pickerRoundCorner="10dp"
<!--the color picker color gradient array default is 0xFFFF0000, 0xFFFF00FF, 0xFF0000FF, 0xFF00FFFF, 0xFF00FF00, 0xFFFFFF00, 0xFFFF0000-->
app:pickerGradientArray="@array/colors"
