I am facing the issue (Xamarin.Android.Common.targets(2550,3): error MSB6006: "java.exe" exited with code 1.) in release mode. I tried different solutions following these links below but still issue persists.
- Debug Mode is Ok, I can use the app on my device.
- Release Mode with "Enable Proguard" Checked and without Linker is Ok
- Release Mode with "Enable Proguard" Checked and with Linker on "Sdk Assemblies Only" is not Ok
In my Diagnostic build I have a lot of lines like those one:
Not remapping resource: Animation.abc_fade_in (TaskId:177)
Not remapping resource: Animator.design_appbar_state_list_animator (TaskId:177)
Not remapping resource: Attribute.actionBarDivider (TaskId:177)
Not remapping resource: Boolean.abc_action_bar_embed_tabs (TaskId:177)
Not remapping resource: Color.ListViewHighlighted (TaskId:177)
Not remapping resource: Dimension.tooltip_y_offset_touch (TaskId:177)
Not remapping resource: Drawable.abc_ab_share_pack_mtrl_alpha (TaskId:177)
Not remapping resource: Id.ALT (TaskId:177)
Not remapping resource: Integer.abc_config_activityDefaultDur (TaskId:177)
.
.
.
Not remapping resource: Styleable.ViewStubCompat_android_layout (TaskId:177)
I also have this:
2>Target "_GetAdditionalResourcesFromAssemblies" skipped. Previously built successfully.
2>Target "_CreateAdditionalResourceCache: (TargetId:278)" in file "D:\Visual Studio\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets" from project "D:\Projets\GitRepos\MyApp\MyApp\MyApp.Android\MyApp.Android.csproj" (target "_CompileJava" depends on it):
2>Skipping target "_CreateAdditionalResourceCache" because it has no outputs.
2>Though the target has declared its outputs, the output specification only references empty properties and/or empty item lists.
2>Done building target "_CreateAdditionalResourceCache" in project "MyApp.Android.csproj".: (TargetId:278)
2>Target "_DetermineJavaLibrariesToCompile: (TargetId:279)" in file "D:\Visual Studio\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets" from project "D:\Projets\GitRepos\MyApp\MyApp\MyApp.Android\MyApp.Android.csproj" (target "_CompileJava" depends on it):
and this:
2> PROGUARD : warning : class [com/companyname/MyApp/R$anim.class] unexpectedly contains class [com.companyname.myapp.R$anim]
2> PROGUARD : warning : class [com/companyname/MyApp/R$animator.class] unexpectedly contains class [com.companyname.myapp.R$animator]
2> PROGUARD : warning : class [com/companyname/MyApp/R$attr.class] unexpectedly contains class [com.companyname.myapp.R$attr]
2> PROGUARD : warning : class [com/companyname/MyApp/R$bool.class] unexpectedly contains class [com.companyname.myapp.R$bool]
2> PROGUARD : warning : class [com/companyname/MyApp/R$color.class] unexpectedly contains class [com.companyname.myapp.R$color]
2> PROGUARD : warning : class [com/companyname/MyApp/R$dimen.class] unexpectedly contains class [com.companyname.myapp.R$dimen]
2> PROGUARD : warning : class [com/companyname/MyApp/R$drawable.class] unexpectedly contains class [com.companyname.myapp.R$drawable]
2> PROGUARD : warning : class [com/companyname/MyApp/R$id.class] unexpectedly contains class [com.companyname.myapp.R$id]
2> PROGUARD : warning : class [com/companyname/MyApp/R$integer.class] unexpectedly contains class [com.companyname.myapp.R$integer]
2> PROGUARD : warning : class [com/companyname/MyApp/R$interpolator.class] unexpectedly contains class [com.companyname.myapp.R$interpolator]
2> PROGUARD : warning : class [com/companyname/MyApp/R$layout.class] unexpectedly contains class [com.companyname.myapp.R$layout]
2> PROGUARD : warning : class [com/companyname/MyApp/R$string.class] unexpectedly contains class [com.companyname.myapp.R$string]
2> PROGUARD : warning : class [com/companyname/MyApp/R$style.class] unexpectedly contains class [com.companyname.myapp.R$style]
2> PROGUARD : warning : class [com/companyname/MyApp/R$styleable.class] unexpectedly contains class [com.companyname.myapp.R$styleable]
2> PROGUARD : warning : class [com/companyname/MyApp/R$xml.class] unexpectedly contains class [com.companyname.myapp.R$xml]
2> PROGUARD : warning : class [com/companyname/MyApp/R.class] unexpectedly contains class [com.companyname.myapp.R]
2> PROGUARD : warning : there were 16 classes in incorrectly named files.
2>
2>
2>"D:\Projets\GitRepos\MyApp\MyApp\MyApp.Android\MyApp.Android.csproj" (Build;BuiltProjectOutputGroup;BuiltProjectOutputGroupDependencies;DebugSymbolsProjectOutputGroup;DebugSymbolsProjectOutputGroupDependencies;DocumentationProjectOutputGroup;DocumentationProjectOutputGroupDependencies;SatelliteDllsProjectOutputGroup;SatelliteDllsProjectOutputGroupDependencies;SGenFilesOutputGroup;SGenFilesOutputGroupDependencies target) (1) ->
2>(_CompileToDalvikWithDx target) ->
2> D:\Visual Studio\2017\Community\MSBuild\Xamarin\Android\Xamarin.Android.Common.targets(2550,3): error MSB6006: "java.exe" exited with code 1.
2>
2> 17 Warning(s)
2> 1 Error(s)
2>
2>Time Elapsed 00:01:03.51
========== Build: 1 succeeded, 1 failed, 0 up-to-date, 3 skipped ==========
After 2 days searching on Google, testing, cleaning and rebuilding my solution I'm still stuck. These 16 classes are not mine and I don't know how to use -dontwarn and -keep for them in proguard.cfg. For confidentiality reasons I can't post the project, but I was able to create a apk and distribute it with app center with a little test app.
My configuration
Windows 10 x64
C:\Program Files (x86)\Java\jdk1.8.0_161
VS2017 Community 15.9.17
Proguard 6.2
Xamarin Forms 4.3.0.991221
D:\Android\Sdk\build-tools\28.0.3\
netstandard2.0
Target Android Version: 9.0
Minimum Android Version: 4.4
Java max heap size - 1G
proguard.cfg:
-keep class com.google.android.gms.** { *; }
-dontwarn com.google.android.gms.**
-keep class android.support.v7.widget.** { *; }
-dontwarn android.support.v7.widget.**
-keep class android.support.v4.widget.Space { *; }
-dontwarn android.support.v4.widget.Space
Can anyone help me please?
links used
[https://stackoverflow.com/questions/52494167/apk-file-not-working-with-enabled-proguard-in-xamarin-forms-android][2]
[https://stackoverflow.com/questions/39514518/xamarin-android-proguard-unsupported-class-version-number-52-0/39514706#39514706][3]
[https://forums.xamarin.com/discussion/9305/java-exe-exited-with-code-1-xamarin-android-common-targets][4]
[https://learn.microsoft.com/fr-fr/xamarin/android/deploy-test/release-prep/proguard?tabs=windows#File_Issues][5]
[https://stackoverflow.com/questions/52494167/apk-file-not-working-with-enabled-proguard-in-xamarin-forms-android][6]
[https://stackoverflow.com/questions/43393942/proguard-java-exe-exited-with-code-1-after-adding-modernhttpclient][7]
[https://stackoverflow.com/questions/43760424/xamarin-proguard-stackoverflowerror?noredirect=1&lq=1][8]
[https://stackoverflow.com/questions/38743557/xamarin-proguard-parseexception-unknown-option-in-line-1-of-file-properties/38745003#38745003][9]
[https://forums.xamarin.com/discussion/159080/how-to-resolve-errors-in-resource-designer-cs-when-building-for-android][10]
I finally found that it's firebase which creates this issue with a new project. To reproduce:
-New blank xamarin forms project
-Targeted Android 9
-Update solution to Xamarin forms 4.3.0
-Update the 6 other plugins to latest stable version
-Add Xamarin.Firebase.Messaging latest
-Add a class derived from FirebaseMessagingService
No need to add google-services.json or to parametrize AndroidManifest.xml As soon as I added the firebase class, release mode with proguard fail. There is a zip file at https://github.com/jdev6630/MyTestApp with the solution, proguard and build.log. I hope it can help someone point me to the solution.
