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Why can't I set the height over the view that I add programmatically?

Disclaimer: I am using Xamarin.Android.

I created a view, set its elevation, and then add it to my main layout. When I fire an event, the view is successfully added to the layout, but there is no shadow of height.

Here is what I work with:

View, which is added programmatically:

public class TooltipTest : FrameLayout
{
    private Context context;
    private ShapeDrawable box;
    private View carrot;
    private string message;

    public TextView TooltipText
    {
        get;
        private set;
    }

    public TooltipTest(Context context, string message) : base(context)
    {
        this.context = context;
        this.message = message;

        Initialize();
    }

    private void Initialize()
    {
        CreateText();
    }

    private void CreateText()
    {
        int paddingTopBottom = 30;
        int paddingLeftRight = 27;

        TooltipText = new TextView(context);
        TooltipText.Text = message;
        TooltipText.SetTextColor(new Color(ContextCompat.GetColor(context, Resource.Color.tooltipText)));
        TooltipText.SetTextSize(ComplexUnitType.Sp, 14f);
        TooltipText.SetPadding(paddingLeftRight, paddingTopBottom, paddingLeftRight, paddingTopBottom);
        TooltipText.SetBackgroundColor(new Color(ContextCompat.GetColor(context, Resource.Color.tooltipBackground)));

        AddView(TooltipText);
    }

Event to add view:

        ButtonTest.Click += (sender, e) => {
            var tooltip = new TooltipTest(this, Resources.GetString(Resource.String.test_text));
            var tooltipParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent);
            tooltip.Elevation = 20f;
            ParentLayout.AddView(tooltip, tooltipParams);
        };

Any ideas on why the shadow is not showing? I tried to set SetClipToPadding (false) and SetClipChildren (false) on tooltip, but this did not affect.

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AppCompat ViewCompat.SetElevation(View, int), . pre-Lollipop , , . , UL Lollipop, :

  android:background="@android:drawable/dialog_holo_light_frame"

, reddit . .

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, TooltipTest. , , , Android, - , - .

, TooltipTest, FrameLayout, TextView (TooltipText) . , Activity, TooltipTest. TooltipTest Layout, Android , .

, , , Elevation TooltipText, TooltipTest.

private void CreateText()
{
    int paddingTopBottom = 30;
    int paddingLeftRight = 27;

    TooltipText = new TextView(context);
    TooltipText.Text = message;
    TooltipText.SetTextColor(new Color(ContextCompat.GetColor(context, Resource.Color.tooltipText)));
    TooltipText.SetTextSize(ComplexUnitType.Sp, 14f);
    TooltipText.SetPadding(paddingLeftRight, paddingTopBottom, paddingLeftRight, paddingTopBottom);
    TooltipText.SetBackgroundColor(new Color(ContextCompat.GetColor(context, Resource.Color.tooltipBackground)));

    TooltipText.Elevation = 21f; //(or whatever value you want)

    AddView(TooltipText);
}

TooltipTest, Background:

private void CreateText()
{
    int paddingTopBottom = 30;
    int paddingLeftRight = 27;

    TooltipText = new TextView(context);
    TooltipText.Text = message;
    TooltipText.SetTextColor(new Color(ContextCompat.GetColor(context, Resource.Color.tooltipText)));
    TooltipText.SetTextSize(ComplexUnitType.Sp, 14f);
    TooltipText.SetPadding(paddingLeftRight, paddingTopBottom, paddingLeftRight, paddingTopBottom);
    TooltipText.SetBackgroundColor(new Color(ContextCompat.GetColor(context, Resource.Color.tooltipBackground)));

    SetBackgroundColor (new Color (ContextCompat.GetColor (context, Resource.Color.white)));

    AddView(TooltipText);
}

. , , Background. SetBackgroundColor(Color color) Background = (some drawable);

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