Hi,
So I’m working on an Android project in 4.20.1 and I’m hitting a weird problem. I’ve been trying to reduce the APK size as per the document here: https://docs.unrealengine.com/en-us/Platforms/Android/ReducingAPKSize
Everything was going well until I started disabling plugins. It seems that disabling **any **plugins causes the game to fail to run when I “launch” it on my device from the menu. For example, disabling “IOS Device Profile Selector” causes the following errors in the output log:
LogPlayLevel: :app:compileDebugJavaWithJavacZ:\app\src\main\java\com\epicgames\ue4\GameActivity.java:100: error: package com.google.vr.sdk.samples.permission does not exist
LogPlayLevel: import com.google.vr.sdk.samples.permission.PermissionHelper;
LogPlayLevel: ^
LogPlayLevel: Z:\app\src\main\java\com\epicgames\ue4\GameActivity.java:526: error: cannot find symbol
LogPlayLevel: PermissionHelper.acquirePermissions(new String] {"android.permission.WRITE_EXTERNAL_STORAGE"}, this);
LogPlayLevel: ^
LogPlayLevel: symbol: variable PermissionHelper
LogPlayLevel: location: class GameActivity
LogPlayLevel: Z:\app\src\main\java\com\epicgames\ue4\GameActivity.java:2031: error: cannot find symbol
LogPlayLevel: if (PermissionHelper.checkPermission("android.permission.GET_ACCOUNTS"))
LogPlayLevel: ^
LogPlayLevel: symbol: variable PermissionHelper
LogPlayLevel: location: class GameActivity
LogPlayLevel: Note: Some input files use or override a deprecated API.
LogPlayLevel: Note: Recompile with -Xlint:deprecation for details.
LogPlayLevel: 3 errors
LogPlayLevel: FAILED
LogPlayLevel: FAILURE: Build failed with an exception.
LogPlayLevel: * What went wrong:
LogPlayLevel: Execution failed for task ':app:compileDebugJavaWithJavac'.
LogPlayLevel: > Compilation failed; see the compiler error output for details.
LogPlayLevel: * Try:
LogPlayLevel: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
LogPlayLevel: * Get more help at https://help.gradle.org
LogPlayLevel: BUILD FAILED in 13s
LogPlayLevel: 37 actionable tasks: 37 executed
LogPlayLevel: ERROR: cmd.exe failed with args /c "D:\Work\Games\Loat\Intermediate/Android/APK\gradle\rungradle.bat" :app:assembleDebug
LogPlayLevel: (see C:\Users\****\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.20\Log.txt for full exception trace)
LogPlayLevel: AutomationTool exiting with ExitCode=1 (Error_Unknown)
LogPlayLevel: Completed Launch On Stage: Deploy Task, Time: 42.375099
LogPlayLevel: BUILD FAILED
PackagingResults: Error: Launch failed! Unknown Error
and from the log.txt:
UEDeployAndroid.MakeApk: ====8/31/2018 9:36:45 AM====PERFORMING FINAL APK PACKAGE OPERATION================================================
UEDeployAndroid.CreateRunGradle:
UEDeployAndroid.CreateRunGradle: Creating rungradle.bat to work around commandline length limit (using unused drive letter Z:)
UEDeployAndroid.RunCommandLineProgramWithException: Making .apk with Gradle...
<>c.<PrintExceptionInfo>b__4_1: ==============================================================================
<>c.<PrintExceptionInfo>b__4_0: ERROR: cmd.exe failed with args /c "D:\Work\Games\Loat\Intermediate/Android/APK\gradle\rungradle.bat" :app:assembleDebug
<>c.<PrintExceptionInfo>b__4_0: (see C:\Users\*****\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.20\Log.txt for full exception trace)
<>c.<PrintExceptionInfo>b__4_1:
<>c.<PrintExceptionInfo>b__4_1: BuildException: cmd.exe failed with args /c "D:\Work\Games\Loat\Intermediate/Android/APK\gradle\rungradle.bat" :app:assembleDebug
<>c.<PrintExceptionInfo>b__4_1: at UnrealBuildTool.UEDeployAndroid.RunCommandLineProgramWithException(String WorkingDirectory, String Command, String Params, String OverrideDesc, Boolean bUseShellExecute) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Platform\Android\UEDeployAndroid.cs:line 1406
<>c.<PrintExceptionInfo>b__4_1: at UnrealBuildTool.UEDeployAndroid.MakeApk(AndroidToolChain ToolChain, String ProjectName, TargetType InTargetType, String ProjectDirectory, String OutputPath, String EngineDirectory, Boolean bForDistribution, String CookFlavor, Boolean bMakeSeparateApks, Boolean bIncrementalPackage, Boolean bDisallowPackagingDataInApk, Boolean bDisallowExternalFilesDir) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Platform\Android\UEDeployAndroid.cs:line 3838
<>c.<PrintExceptionInfo>b__4_1: at UnrealBuildTool.UEDeployAndroid.PrepForUATPackageOrDeploy(FileReference ProjectFile, String ProjectName, DirectoryReference ProjectDirectory, String ExecutablePath, String EngineDirectory, Boolean bForDistribution, String CookFlavor, Boolean bIsDataDeploy) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Platform\Android\UEDeployAndroid.cs:line 3990
<>c.<PrintExceptionInfo>b__4_1: at AndroidPlatform.Deploy(ProjectParams Params, DeploymentContext SC) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\Android\AndroidPlatform.Automation.cs:line 1012
<>c.<PrintExceptionInfo>b__4_1: at Project.Deploy(ProjectParams Params) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\Scripts\DeployCommand.Automation.cs:line 56
<>c.<PrintExceptionInfo>b__4_1: at BuildCookRun.DoBuildCookRun(ProjectParams Params) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\Scripts\BuildCookRun.Automation.cs:line 222
<>c.<PrintExceptionInfo>b__4_1: at BuildCookRun.ExecuteBuild() in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\Scripts\BuildCookRun.Automation.cs:line 41
<>c.<PrintExceptionInfo>b__4_1: at AutomationTool.BuildCommand.Execute() in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\AutomationUtils\BuildCommand.cs:line 112
<>c.<PrintExceptionInfo>b__4_1: at AutomationTool.Automation.Execute(List`1 CommandsToExecute, Dictionary`2 Commands) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\AutomationUtils\Automation.cs:line 562
<>c.<PrintExceptionInfo>b__4_1: at AutomationTool.Automation.Process(String] Arguments, StartupTraceListener StartupListener) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\AutomationUtils\Automation.cs:line 532
<>c.<PrintExceptionInfo>b__4_1: at AutomationTool.Program.MainProc(String] Arguments, StartupTraceListener StartupListener) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\Program.cs:line 174
<>c.<PrintExceptionInfo>b__4_1: at AutomationTool.Program.<>c__DisplayClass1_0.<Main>b__0() in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\Program.cs:line 100
<>c.<PrintExceptionInfo>b__4_1: at AutomationTool.InternalUtils.RunSingleInstance(Func`1 Main) in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\AutomationUtils\Utils.cs:line 725
<>c.<PrintExceptionInfo>b__4_1: at AutomationTool.Program.Main() in D:\Build\++UE4\Sync\Saved\CsTools\Engine\Source\Programs\AutomationTool\Program.cs:line 100
<>c.<PrintExceptionInfo>b__4_1: ==============================================================================
Program.Main: AutomationTool exiting with ExitCode=1 (Error_Unknown)
That first line is strange, since it seems to be referring to VR samples, which are not relevant to my project or the plugin I disabled. I’m probably doing something dumb 
But is there a config step I could have missed somewhere?
