Bug 27409 - Set color to Label in Android multiple times don't work
Summary: Set color to Label in Android multiple times don't work
Status: RESOLVED FIXED
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.3.4
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2015-02-25 09:09 UTC by Fredy Wenger
Modified: 2016-04-08 19:09 UTC (History)
5 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:


Attachments
Test Sample. (6.58 MB, application/octet-stream)
2015-02-26 07:53 UTC, Rajneesh Kumar
Details


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Status:
RESOLVED FIXED

Description Fredy Wenger 2015-02-25 09:09:46 UTC
Set the color of labels multiple-times on Android don't work anymore (while it works on iOS and WP).
Example:
Set color to a Label to white and size e.g. to 14 (by creation).
Then set the color of the label to red and the size to 18 (e.g. by tap on a button).
=> This works

Then set the size back to 14 and the color back to white (e.g. by tap on another button). 
=> The re-size works, but the color don't work (remains red)
Comment 1 Rajneesh Kumar 2015-02-26 07:53:43 UTC
Created attachment 10051 [details]
Test Sample.

I tried to reproduce this issue but not able to reproduce this. To reproduce
this issue I have followed the steps mention below:

1. Open attached test sample in VS.
2. Set android as start-up project and deploy it on emulator.
3. It will deploy successfully, and will show on label and two Buttons.
4. Click on "Button One", observed that the color of the label changed to "Red" and the size to 18.
5. Click on "Button Two", observed that the color of the label changed to "White" and the size to 14.
6. Repeat this several times.

I observed that on clicking "Button Two" the color of the label changed to "White" and the size to 14. Please refer the screencast for the same.

Screencast: http://www.screencast.com/t/IxbTclJW

Could you please provide a small sample to reproduce this issue? Or please let me know that what steps I am missing to reproduce this issue. Also please attach your full environment info, and Ide Logs. That would be
very helpful to reproduce this issue at our end.

You can get Environment info here:
Help=>About Visual Studio=>Copy info.
You Can get VS Trace logs here:
Help=>Zip Xamarin Logs=>(Save Zip file and after unzip copy logs.)

Application Output: https://gist.github.com/Rajneesh360Logica/8cf8581c8770750292f9
VS Trace Logs: https://gist.github.com/Rajneesh360Logica/5745b9a8a7a8cd10368e
Device Logs(XAP): https://gist.github.com/Rajneesh360Logica/c0c53e6142dab09360e8

====Environment info:====

Xamarin.Forms Version: 1.3.5.6333-pre1

Microsoft Visual Studio Professional 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.5.50938

Installed Version: Professional

LightSwitch for Visual Studio 2013   06177-004-0446016-02381
Microsoft LightSwitch for Visual Studio 2013

Team Explorer for Visual Studio 2013   06177-004-0446016-02381
Microsoft Team Explorer for Visual Studio 2013

Visual Basic 2013   06177-004-0446016-02381
Microsoft Visual Basic 2013

Visual C# 2013   06177-004-0446016-02381
Microsoft Visual C# 2013

Visual C++ 2013   06177-004-0446016-02381
Microsoft Visual C++ 2013

Visual F# 2013   06177-004-0446016-02381
Microsoft Visual F# 2013

Visual Studio 2013 Code Analysis Spell Checker   06177-004-0446016-02381
Microsoft® Visual Studio® 2013 Code Analysis Spell Checker

Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.

The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

Windows Phone SDK 8.0 - ENU   06177-004-0446016-02381
Windows Phone SDK 8.0 - ENU

Application Insights Tools for Visual Studio Package   1.0
Application Insights Tools for Visual Studio

ASP.NET and Web Tools   12.4.51016.0
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Editor extensions for HTML, CSS, and JavaScript
Page Inspector: Inspection tool for ASP.NET web projects
Scaffolding: A framework for building and running code generators
Server Explorer extensions for Microsoft Azure Websites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Microsoft Azure

ASP.NET Web Frameworks and Tools 2012.2   4.1.21001.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563

ASP.NET Web Frameworks and Tools 2013   5.2.21010.0
For additional information, visit http://www.asp.net/

Common Azure Tools   1.3
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Microsoft Advertising SDK for Windows Phone   
Microsoft Advertising SDK for Windows Phone
Build 

Microsoft Azure Mobile Services Tools   1.3
Microsoft Azure Mobile Services Tools

NuGet Package Manager   2.8.50926.663
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.

Office Developer Tools for Visual Studio 2013 ENU   12.0.30626
Microsoft Office Developer Tools for Visual Studio 2013 ENU

PowerShell Tools   1.3
Provides file classification services using PowerShell

PreEmptive Analytics Visualizer   1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.

SQL Server Data Tools   12.0.41012.0
Microsoft SQL Server Data Tools

Windows Phone 8.1 SDK Integration   1.0
This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio.

Workflow Manager Tools 1.0   1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.

Xamarin   3.9.344.0 (e23ab72)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android   4.20.0.34 (49a04b966feb40dfdba49d57ba16249b66d606a6)
Visual Studio plugin to enable development for Xamarin.Android.

Xamarin.iOS   8.6.2.0 (862702c6b8aa14a373e25f83ac45918556af41a2)
Visual Studio extension to enable development for Xamarin.iOS.

Xamarin.iOS Unified Migration   1.0
Automated migration for Xamarin iOS Classic projects to Unified
Comment 2 Fredy Wenger 2015-02-26 13:06:03 UTC
Hi Rajneesh 

As you were not able to comprehend the bug:
- I have downloadet your example 
- Tried to make the color NOT working

First, I thought, the problem has something to do with my (complex) layout in the page.
I then have started to enhance your small example step by step to the complex layout of my page and tested every step - without success.
=> This has cost me about two hours :-((

But... I have found the problem
It's completely different bug! 

In my app, I use global variables (with "speaking names") like:
FarbeRot (color red)
FarbeBlau  (color blue) 
and - :  FarbeStandard (color STANDARD)

For the colors, I set explicitly colors

Unfortunately - and this is the Bug - for the FarbeStandard, I use the XF-Function:
FarbeStandard = Color.Default;

So. the default-color for iOS should be black, for WP white and for Android also white.

THE PROBLEM IS, THAT Color.Default DONT'T GIVE BACK A VALID VALUE (some -1, -1, ... instead of the correct value.)
As the value is false (but don't generate an exception), the code run's, but the color is not changed, what generates my effect!

So, I have changed my code for Android to not use Color.Default, but instead Color.White.
=> Now it works!

So the real bug is, that Color.Default don't work in Android (give back false value), while it works on iOS and WP.

If you change your small example-app from color.white to color.default, you should easy comprehend it.

Please do that and fill an new bug or change the text to this bug.

Thanks
Fredy
Comment 3 Fredy Wenger 2015-05-28 07:52:05 UTC
I review all my filled bugs and set it to resolved, if I don't see the bug with the latest version (to help Xamarin to clean-out Bugzilla).
As I don't know, if the real bug still exist:

"So the real bug is, that Color.Default don't work in Android (give back false
value), while it works on iOS and WP." (see my last message)

I write this comment and don't mark the bug as resolvd
Comment 4 E.Z. Hart [MSFT] 2016-04-08 19:09:53 UTC
Thank you for taking the time to submit this report. After reviewing the description of this bug, we believe it no longer affects the current version of Xamarin.Forms. If you are still experiencing the issue after updating your packages, please reopen this report with an attached reproduction.
 
For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d

Warm regards,
Xamarin Forms Team