Develop Reference

NuGet Dotfuscator with Xamarin.Android

I'm trying run PreEmptive.Protection.Dotfuscator.Pro[.Eval] -Version 6.0.1 in project Xamarin.Android that include Nuget to aid migration from Android Support to Android X:
<PackageReference Include="Xamarin.AndroidX.Migration">
<Version>1.0.4</Version>
</PackageReference>
but the result is this:
"/Droid/Droid.csproj" (default target) (6) ->
(_AndroidXCecilfy target) ->
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : Symbols were found but are not matching the assembly [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Mono.Cecil.ModuleDefinition.ReadSymbols (Mono.Cecil.Cil.ISymbolReader reader, System.Boolean throwIfSymbolsAreNotMaching) [0x0003c] in <1b16609822914d769fb771c1bb74cd3b>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Mono.Cecil.ModuleReader.ReadSymbols (Mono.Cecil.ModuleDefinition module, Mono.Cecil.ReaderParameters parameters) [0x00060] in <1b16609822914d769fb771c1bb74cd3b>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Mono.Cecil.ModuleReader.CreateModule (Mono.Cecil.PE.Image image, Mono.Cecil.ReaderParameters parameters) [0x00081] in <1b16609822914d769fb771c1bb74cd3b>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Mono.Cecil.ModuleDefinition.ReadModule (Mono.Disposable1[T] stream, System.String fileName, Mono.Cecil.ReaderParameters parameters) [0x0000d] in <1b16609822914d769fb771c1bb74cd3b>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Mono.Cecil.ModuleDefinition.ReadModule (System.String fileName, Mono.Cecil.ReaderParameters parameters) [0x0006c] in <1b16609822914d769fb771c1bb74cd3b>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Mono.Cecil.AssemblyDefinition.ReadAssembly (System.String fileName, Mono.Cecil.ReaderParameters parameters) [0x00000] in <1b16609822914d769fb771c1bb74cd3b>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Xamarin.AndroidX.Migration.CecilMigrator.Migrate (System.String source, System.String destination) [0x001c2] in <865a8af74cb24987acc1eca3a5f0df36>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Xamarin.AndroidX.Migration.CecilMigrator.Migrate (System.Collections.Generic.IEnumerable1[T] assemblies) [0x00012] in <865a8af74cb24987acc1eca3a5f0df36>:0 [/Droid/Droid.csproj]
/.nuget/packages/xamarin.androidx.migration/1.0.4/buildTransitive/monoandroid90/Xamarin.AndroidX.Migration.targets(227,9): error : at Xamarin.AndroidX.Migration.BuildTasks.CecilfyFiles.Execute () [0x000e3] in <770add7f13554ba8ad474c9c8fea5326>:0 [/Droid/Droid.csproj]
Information about the build agent OS:
=== Visual Studio Community 2019 for Mac ===
Version 8.5.4 (build 12)
Installation UUID: 097d734b-78c4-46b2-a654-ed5233f4a357
GTK+ 2.24.23 (Raleigh theme)
Xamarin.Mac 6.14.1.39 (d16-5 / 30e8706b4)
=== Mono Framework MDK ===
Runtime:
Mono 6.8.0.123 (2019-10/1d0d939dc30) (64-bit)
Package version: 608000123
=== .NET Core SDK ===
SDK: /usr/local/share/dotnet/sdk/3.1.200/Sdks
SDK Versions:
3.1.200
2.1.701
2.1.504
2.1.302
2.1.4
MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.8.0/lib/mono/msbuild/Current/bin/Sdks
=== Xamarin.Android ===
Version: 10.0.6.2 (Visual Studio Community)
Commit: xamarin-android/d16-3/c407838
Android SDK: /Users/emegonza/Library/Android/sdk
Supported Android versions:
6.0 (API level 23)
8.1 (API level 27)
SDK Tools Version: 26.1.1
SDK Platform Tools Version: 30.0.0
SDK Build Tools Version: 30.0.0 rc2
Build Information:
Mono: mono/mono/2019-06#476d72b9e32
Java.Interop: xamarin/java.interop/d16-3#5836f58
LibZipSharp: grendello/LibZipSharp/d16-3#71f4a94
LibZip: nih-at/libzip/rel-1-5-1#b95cf3fd
ProGuard: xamarin/proguard/master#905836d
SQLite: xamarin/sqlite/3.27.1#8212a2d
Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-3#cb41333
=== Operating System ===
Mac OS X 10.15.5
Darwin 19.5.0 Darwin Kernel Version 19.5.0
Tue May 26 20:41:44 PDT 2020
I run dotfuscator with this lines in the DotfuscatorConfig.xml, to see the error
<global>
<option>verbose</option>
</global>
Can you help me to find, why this problem happen and how to fix it?

Getting a build error in Unity3d when building a VR project

I am trying to build a sample project which can be found at this link https://www.coursera.org/learn/xr-introduction/supplement/cARor/project-work-build-a-vr-application-to-your-device and I am getting this error:
Build completed with a result of 'Failed'
UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()
UnityEditor.BuildPlayerWindow+BuildMethodException: 4 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x00242] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:194
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x0007f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:97
UnityEditor.BuildPlayerWindow:BuildPlayerAndRun()
What to do?

Try to build in a different location? Preferably outside your project folder.

Errors while trying to build Unity app for VR

When I build or "build and run" the project I get three main errors. The project works because when I press play it does what it suppose to do in the game window. I'm trying to develop for the gearVr and Oculus which I selected in project settings.
I've looked at unity preferences made sure its using the correct SDK, JDK and NDK I even tried using the recommended settings but still couldn't upload anything to my device.
ERROR 1
CommandInvokationFailure: Gradle build failed. C:\Program
Files\Unity\Hub\Editor\2019.1.2f1\Editor\Data\PlaybackEngines\AndroidPlayer/Tools\OpenJDK\Windows\bin\java.exe
-classpath "C:\Program Files\Unity\Hub\Editor\2019.1.2f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-4.6.jar"
org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx4096m"
"assembleRelease"
stderr[
FAILURE: Build failed with an exception.
What went wrong: Execution failed for task ':packageRelease'.
org.gradle.tooling.BuildException (no error message) ...
ERROR 2
Build completed with a result of 'Failed' 0x00007FF6E6F9104C (Unity)
StackWalker::GetCurrentCallstack 0x00007FF6E6F94501 (Unity)
StackWalker::ShowCallstack 0x00007FF6E56FDCC5 (Unity) GetStacktrace
0x00007FF6E79AF1D0 (Unity) DebugStringToFile 0x00007FF6E6FBFB49
(Unity) DebugLogHandler_CUSTOM_Internal_Log 0x00000200025704EB (Mono
JIT Code) (wrapper managed-to-native)
UnityEngine.DebugLogHandler:Internal_Log
(UnityEngine.LogType,UnityEngine.LogOption,string,UnityEngine.Object)
...
ERROR 3
UnityEditor.BuildPlayerWindow+BuildMethodException: 53 errors
at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer
(UnityEditor.BuildPlayerOptions options) [0x00242] in
C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:194
at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean
askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions)
[0x0007f] in
C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:97
0x00007FF6E6F9104C (Unity) StackWalker::GetCurrentCallstack
0x00007FF6E6F94501 (Unity) StackWalker::ShowCallstack
0x00007FF6E56FDCC5 (Unity) GetStacktrace 0x00007FF6E79AF1D0 (Unity)
DebugStringToFile 0x00007FF6E6FBFB49 (Unity)
DebugLogHandler_CUSTOM_Internal_Log 0x00000200025704EB (Mono JIT Code)
(wrapper managed-to-native) UnityEngine.DebugLogHandler:Internal_Log
(UnityEngine.LogType,UnityEngine.LogOption,string,UnityEngine.Object)
0x00000200025703AB (Mono JIT Code) [DebugLogHandler.cs:10]
UnityEngine.DebugLogHandler:LogFormat
(UnityEngine.LogType,UnityEngine.Object,string,object[])
0x0000020002564691 (Mono JIT Code) [Logger.cs:61]
UnityEngine.Logger:Log (UnityEngine.LogType,object)
0x000002000257E7ED (Mono JIT Code) [Debug.bindings.cs:127]
UnityEngine.Debug:LogError (object) 0x0000020039D5E5E3 (Mono JIT
Code) [BuildPlayerWindowBuildMethods.cs:103]
UnityEditor.BuildPlayerWindow:CallBuildMethods
(bool,UnityEditor.BuildOptions) 0x0000020039D377FB (Mono JIT Code)
[BuildPlayerWindow.cs:908]
UnityEditor.BuildPlayerWindow:GUIBuildButtons
(UnityEditor.Modules.IBuildWindowExtension,bool,bool,bool,UnityEditor.Build.BuildPlatform)
Normally the apk will be uploaded to my phone asking me to place the device into the GearVR.

There seems to be a problem with Gradle. As a workaround you could try to switch from "gradle" to "internal" in the Build Window.

Android: building a static aarch64 gdb

I am having a lot of trouble using gdbserver and gdbserver64 on Android and the companion aarch64 gdb on my host. For example, I run into issues like this, where gdb is outputting what seems to be nonsense:
(gdb) target remote :5039
Remote debugging using :5039
warning: Could not load vsyscall page because no executable was specified
try using the "file" command first.
0x0000007fa7921d2c in ?? ()
(gdb) bt
Python Exception <type 'exceptions.ImportError'> No module named gdb.frames:
#0 0x0000007fa7921d2c in ?? ()
#1 0x0000000040000600 in ?? ()
Backtrace stopped: Cannot access memory at address 0x22eee199476794f4
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x0000007f87c249b4 in ?? ()
(gdb) x/4i $pc
=> 0x7f87c249b4: ldrb w8, [x0,#432]
0x7f87c249b8: cbz w8, 0x7f87c249ec
0x7f87c249bc: ldr x8, [x19,#3632]
0x7f87c249c0: ldr x9, [x8,#24]
(gdb) bt
Python Exception <type 'exceptions.ImportError'> No module named gdb.frames:
#0 0x0000007f87c249b4 in ?? ()
#1 0x0000007fa4b4fb25 in ?? ()
#2 0x0000000000000001 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) c
Continuing.
[New Thread 22374]
[New Thread 22375]
Program received signal SIGSEGV, Segmentation fault.
0x0000007f87c249b4 in ?? ()
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x0000007f87c249b4 in ?? ()
This is almost impossible to use, with everything being totally unhelpful. No symbols are loaded and no backtraces are even remotely reasonable. The app is also repeatedly signaled in places that it is not signaled at when being straced or traced using a static gdb (just to name one specific problem with it).
However, I was able to use a prebuilt armv7a statically linked gdb binary to debug some 32-bit applications in an Android emulator with relative ease. I ran the static gdb in a device shell without issue. I had no trouble loading symbols and had no odd signaling problems.
I couldn't find a statically linked aarch64 gdb binary anywhere, so I tried to build one inside my aarch64 chroot. I did manage to build gdb for aarch64, and I used these configure flags:
LDFLAGS="-static" ../configure --prefix=/noprefix --enable-static --disable-shared --disable-interprocess-agent --disable-libcc1
But it is dynamically linked, which is not what I wanted.
root#gram:/opt/gdb-aarch64/noprefix/bin# file gdb
gdb: ELF 64-bit LSB shared object, ARM aarch64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-aarch64.so.1, for GNU/Linux 3.7.0, BuildID[sha1]=f1a630e569467794c45b4389f510720c4342704b, not stripped
How do I build a statically linked linux aarch64 gdb?

Unity 3d android building error

When I try to build a .apk file it gives me the following 2 errors:
Error building Player: Win32Exception:
ApplicationName='C:/Users/Teodor/AppData/Local/Android/android-sdk/platforms/android-18\aapt.exe',
CommandLine='package -v -f -m -J gen -M AndroidManifest.xml -S "res"
-I "C:/Users/Teodor/AppData/Local/Android/android-sdk/platforms/android-18\android.jar"
-F bin/resources.ap_', CurrentDirectory='Temp/StagingArea' UnityEditor.HostView:OnGUI()
and
Exception: Error building Player: Win32Exception:
ApplicationName='C:/Users/Teodor/AppData/Local/Android/android-sdk/platforms/android-18\aapt.exe',
CommandLine='package -v -f -m -J gen -M AndroidManifest.xml -S "res"
-I "C:/Users/Teodor/AppData/Local/Android/android-sdk/platforms/android-18\android.jar"
-F bin/resources.ap_', CurrentDirectory='Temp/StagingArea' UnityEditor.BuildPlayerWindow.BuildPlayerWithDefaultSettings (Boolean
askForBuildLocation, BuildOptions forceOptions) (at
C:/BuildAgent/work/842f9557127e852/Editor/Mono/BuildPlayerWindow.cs:367)
UnityEditor.BuildPlayerWindow.GUIBuildButtons (Boolean
enableBuildButton, Boolean enableBuildAndRunButton, Boolean
canInstallInBuildFolder) (at
C:/BuildAgent/work/842f9557127e852/Editor/Mono/BuildPlayerWindow.cs:972)
UnityEditor.BuildPlayerWindow.ShowBuildTargetSettings () (at
C:/BuildAgent/work/842f9557127e852/Editor/Mono/BuildPlayerWindow.cs:953)
UnityEditor.BuildPlayerWindow.OnGUI () (at
C:/BuildAgent/work/842f9557127e852/Editor/Mono/BuildPlayerWindow.cs:726)
System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags
invokeAttr, System.Reflection.Binder binder, System.Object[]
parameters, System.Globalization.CultureInfo culture) Rethrow as
TargetInvocationException: Exception has been thrown by the target of
an invocation. System.Reflection.MonoMethod.Invoke (System.Object obj,
BindingFlags invokeAttr, System.Reflection.Binder binder,
System.Object[] parameters, System.Globalization.CultureInfo culture)
System.Reflection.MethodBase.Invoke (System.Object obj,
System.Object[] parameters) UnityEditor.HostView.Invoke (System.String
methodName, System.Object obj) (at
C:/BuildAgent/work/842f9557127e852/Editor/Mono/GUI/DockArea.cs:225)
UnityEditor.HostView.Invoke (System.String methodName) (at
C:/BuildAgent/work/842f9557127e852/Editor/Mono/GUI/DockArea.cs:218)
UnityEditor.HostView.OnGUI () (at
C:/BuildAgent/work/842f9557127e852/Editor/Mono/GUI/DockArea.cs:119)
and I dont know how to fix it.
In Unity 4.2.0 it doesn't give me any errors, but in 3.4.2 even if the project contains just the main camera and a cube it gives me these errors and the .apk file is not built. How can I resolve this?

Try to search the Android SDK directory for the file aapt.exe. In the later versions, it was moved to android-sdk/build-tools/18.0.0/. Look there and, if you find it, copy it from there to your android-sdk/platforms/android-18 folder.

I had an error very similar to this. What solved it for me was installing the Android SDK Build Tools using the Android SDK Manager.

There are some new Tools introduced in Android sdk -18 so the old unity version will not work
with new android tools as most of them are changed.