Bug 36031 - Button border not drawn on Android without a BorderRadius
Summary: Button border not drawn on Android without a BorderRadius
Alias: None
Product: Forms
Classification: Xamarin
Component: Android ()
Version: 1.5.2
Hardware: PC Mac OS
: Highest normal
Target Milestone: ---
Assignee: Rui Marinho
: 51102 58258 59527 ()
Depends on:
Reported: 2015-11-18 22:52 UTC by Adam Patridge
Modified: 2018-02-13 19:16 UTC (History)
23 users (show)

Tags: ac, button, android, border, fr
Is this bug a regression?: ---
Last known good build:

Drop-in PCL Xamarin.Forms app C# file for a new project. (1.75 KB, application/octet-stream)
2015-11-18 22:52 UTC, Adam Patridge

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Description Adam Patridge 2015-11-18 22:52:15 UTC
Created attachment 13880 [details]
Drop-in PCL Xamarin.Forms app C# file for a new project.

[Also affects Xamarin.Forms v2.0.0.6482.]

If a Button has a BorderColor and BorderWidth set, but a 0 BorderRadius, when rendered on Android, the border will not be shown.

Reproduction code (as included in the full PCL app attached):

> new Button {
> 	Text = "BorderWidth = 1, BorderRadius = 0,",
> 	HorizontalOptions = LayoutOptions.Center,
> 	BackgroundColor = Color.Black,
> 	BorderColor = Color.Red,
> 	BorderWidth = 1,
> 	BorderRadius = 0,
> },

A screenshot of this code run on API 22 is included in a related Stack Overflow answer.

Comment 1 Alma Jensen 2015-12-02 05:19:39 UTC
I tested this on a Samsung Galaxy S5 and BorderWidth, Radius, and Color all do not seem to work in Xamarin Forms 2+.
Comment 2 René 2016-03-12 14:02:52 UTC
Still an issue in but even setting a border radius doesn't seem to fix it anymore.
Comment 3 Adam Patridge 2016-03-12 18:43:14 UTC
René, depending on what size border width you are using, that may be making it worse for you. It is possible that there is a link between border visibility and border width combined with border radius. One comment on this SO answer mentions that thick borders require more radius to show up: http://stackoverflow.com/a/33792652/48700. It's not a pretty solution, but it might work for you.
Comment 4 Andrei.N 2016-10-19 09:01:18 UTC
It depends if you are using FormsAppComat or not.


If you look to the code of the AppCompat Button renderer code, the 'BorderColor' property is not used at all, which means border color is not implemented.
Comment 5 tim.ahrentlov 2016-11-24 13:22:27 UTC
So. Will BorderColor ever be implemented for FormsAppCompat ?
Comment 6 Samantha Houts [MSFT] 2016-12-28 19:58:29 UTC
*** Bug 51102 has been marked as a duplicate of this bug. ***
Comment 7 Seifer 2017-02-10 17:32:32 UTC
Any news on this?
Comment 8 Dimitar Dobrev 2017-04-11 09:27:03 UTC
This bug is more than a year and a half old, when is it going to be fixed? The workaround at https://forums.xamarin.com/discussion/comment/165832/#Comment_165832 no longer works.
Comment 9 Jeroen 2017-05-19 08:17:08 UTC
This workaround still seems to work:

using Xamarin.Forms.Platform.Android;
using Xamarin.Forms;
[assembly: ExportRenderer(typeof(Button), typeof(Droid.Renderers.BorderButtonRenderer))]
namespace Droid.Renderers
   /// <summary>
   /// Custom renderer for buttons with a custom border
   /// </summary>
   public class BorderButtonRenderer : ButtonRenderer
      protected override void OnDraw(Android.Graphics.Canvas canvas)

      protected override void OnElementChanged(ElementChangedEventArgs<Button> e)
Comment 11 Rui Marinho 2017-06-01 10:29:35 UTC
Should be fixed on 2.3.6-pre1
Comment 12 Rui Marinho 2017-06-26 15:55:30 UTC
Moved the fixed to 2.3.5-pre6
Comment 17 Paul DiPietro [MSFT] 2017-07-13 19:26:52 UTC
I have tested the originally provided code against the 2.3.5-pre6 build (making changes to correctly display a white font color) and the borders are showing as expected. I suspect you may have to properly clean/rebuild and delete bin/obj/package folders as necessary. I will attach a screenshot of my emulator.
Comment 19 Saurabh Paunikar 2017-07-17 06:34:34 UTC
Verified on Xamarin.Form version

ScreenCast Link : https://www.screencast.com/t/X0SVYIgKW
Comment 20 Jimmy [MSFT] 2017-07-19 22:12:46 UTC
*** Bug 58258 has been marked as a duplicate of this bug. ***
Comment 21 Samantha Houts [MSFT] 2017-10-04 19:01:00 UTC
Unfortunately, this fix had unintended visual side effects and must be reverted at this time. We will revisit this issue.

Comment 22 Samantha Houts [MSFT] 2017-10-31 16:51:30 UTC
*** Bug 59527 has been marked as a duplicate of this bug. ***
Comment 23 David Ortinau [MSFT] 2017-12-20 01:24:23 UTC
Migrated to https://github.com/xamarin/Xamarin.Forms/issues/1436

Please follow that issue for future updates.
Comment 24 Samantha Houts [MSFT] 2018-02-13 19:16:40 UTC