Colors do not correspond with application theme

[kuhy]

First of all, I would like to thank you for this amazing library. It is the best PickerView I found so far. There is only one problem.

When I use PickerView with dark theme, topMask and bottomMask are not set correctly. Please set those fields to value corresponding with actual theme. You will need to add something like this:

TypedValue typedValue = new TypedValue();
if (resolveAttribute(android.R.attr.windowBackground, typedValue, true)) {
    int[] gradientColors = {typedValue.data, Color.TRANSPARENT};
    topMask = new GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, gradientColors);
    bottomMask = new GradientDrawable(GradientDrawable.Orientation.BOTTOM_TOP, gradientColors);
}

Or make those fields public. In the meantime, I am forced to use this ugly workaround (reflection):

fun Resources.Theme.fixPickerViewsMask(vararg pickerViews: PickerView) {
    val typedValue = TypedValue()
    if (resolveAttribute(android.R.attr.windowBackground, typedValue, true)) {
        val gradientColors = intArrayOf(typedValue.data, Color.TRANSPARENT)

        val topMask = PickerView::class.java.getDeclaredField("topMask")
        topMask.isAccessible = true
        val bottomMask = PickerView::class.java.getDeclaredField("bottomMask")
        bottomMask.isAccessible = true

        for (picker in pickerViews) {
            topMask.set(picker, GradientDrawable(GradientDrawable.Orientation.TOP_BOTTOM, gradientColors))
            bottomMask.set(picker, GradientDrawable(GradientDrawable.Orientation.BOTTOM_TOP, gradientColors))
        }
    }
}