[Bug] Attribute "android:XXXXX" has already been defined

[MickLesk]

Description

I have updated my project to Xamarin Forms 4.3.0.851321-pre3. When I wanted to build the Android version of my app, I got the error that several attributes are already defined. I looked at the generated "values.xml" and there e.g. "android:translationX" is present several times.

Values.xml --> https://www.protectedtext.com/gjfrjzrj (Password: 1234)

I have already deleted the obj and am folder deleted and recreated. The error appears every time. If I install the project back to the previous version then everything works correctly again.

Steps to Reproduce

1. Build my App (Android) - Mind.-Lvl: Android 6.0 - Max.-Lvl: Android 9.0
2. Get Error while Building:

Android\obj\Debug\90\lp\24\jl\res\values\values.xml(319): error APT0000: Attribute "android:alpha" has already been defined
Android\obj\Debug\90\lp\24\jl\res\values\values.xml(322): error APT0000: Attribute "android:translationX" has already been defined
Android\obj\Debug\90\lp\24\jl\res\values\values.xml(322): error APT0000: Attribute "android:translationY" has already been defined
Android\obj\Debug\90\lp\24\jl\res\values\values.xml(322): error APT0000: Attribute "android:translationZ" has already been defined

Expected Behavior

• App to be built normally

Actual Behavior

• App crashes during build attempt

Basic Information

• Version with issue: 4.3.0.851321-pre3
• Last known good version: 4.2.0.848062
• IDE: Visual Studio 2019 Professional
• Platform Target Frameworks:
  • iOS: No Check with iOS
  • Android: SDK: 28.0.3 / Android 9 Device (S9+)
  • UWP: No Check with UWP
• Android Support Library Version: 28.0.0.3
• Nuget Packages: Forms (pre3)
• Affected Devices: Samsung Galaxy S9+ Duos

Screenshots

https://i.imgur.com/w0us0gH.png - Errorlist

Reproduction Link

[kingces95]

Please attach the app that builds and provide the steps you take to upgrade so that it unexpectedly no longer builds.

[MickLesk]

Please attach the app that builds and provide the steps you take to upgrade so that it unexpectedly no longer builds.

I can't give you the source code because it's being used commercially. (Company app).
What exactly do you need?
I did the update to the new 4.3-pre version today, the bug is still there.

[jonathanpeppers]

Can you attach a diagnostic MSBuild log?

and perhaps the obj\Debug\90\lp\24\jl\res\values\values.xml file it is complaining about? Thanks!

[MickLesk]

Hey,

this is the Error:
https://i.imgur.com/yJ0UgmJ.png

The File who you need, dont exist.
I come to the path \obj\Debug\90\lp\24\jl but i dont have \res

How can i fix this error?
I can fix the error, when i create a new "Debug" Config in Visual Studio with the same Settings from the old. Then it works.
Look: https://i.imgur.com/D5WfNOa.png

[jonathanpeppers]

Can you attach the build log? Thanks! See: #3896 (comment)

[MickLesk]

Hey,

i upload the complete lp-Folder as .zip.
You can check it out here:
Mega - zip-File:
https://mega.nz/#!D8RDyaZL!oOf3oDaJgWHKBrpYipc656gj0ZiWZKqzEtjI6VjjSqs
Virustotal:
https://www.virustotal.com/gui/file/48ad57585e31ad50ebba9249ed17ec4f4c11cffc96736a531cff744a34319ee3/detection

[hanwj]

Hey,
I also have this problem when I build a android project.
I solved this problem by updating gradle plugin and gradle version.

gradle-plugin: 3.0.1 -> 3.5.3
gradle : 4.4 -> 5.4.1

hope this can help you!

[rogihee]

I solved this by switching to the D8 DEX compiler instead of DX