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Error showing while I did nothing : Execution failed for task ':app:mergeDebugResources'. ; Caused by: java.lang.NullPointerException

I'm currently creating an application with Android Studio and Kotlin.
This morning, when I tried to run the app on the emulator and my phone, I got an error but what I don't understand it's I barely change the code : I just added a textview (tried to delete it but I still got the error. I tried to investigate and do think but none of them worked. I still don't really understand the error, could you help me fix it ?
Here the error :
Caused by: org.gradle.workers.internal.DefaultWorkerExecutor$WorkExecutionException: A failure occurred while executing com.android.build.gradle.internal.res.ResourceCompilerRunnable
Caused by: com.android.aaptcompiler.ResourceCompilationException: Resource compilation failed. Check logs for details.
at com.android.aaptcompiler.ResourceCompiler.compileResource(ResourceCompiler.kt:126)
at com.android.build.gradle.internal.res.ResourceCompilerRunnable$Companion.compileSingleResource(ResourceCompilerRunnable.kt:34)
at com.android.build.gradle.internal.res.ResourceCompilerRunnable.run(ResourceCompilerRunnable.kt:15)
at com.android.build.gradle.internal.profile.ProfileAwareWorkAction.execute(ProfileAwareWorkAction.kt:74)
... 3 more
Caused by: java.lang.NullPointerException
at com.android.aaptcompiler.TableExtractor.flattenXmlSubTree(TableExtractor.kt:851)
at com.android.aaptcompiler.TableExtractor.parseXml(TableExtractor.kt:516)
at com.android.aaptcompiler.TableExtractor.parseArrayImpl(TableExtractor.kt:1300)
at com.android.aaptcompiler.TableExtractor.parseStringArray(TableExtractor.kt:1243)
at com.android.aaptcompiler.TableExtractor.access$parseStringArray(TableExtractor.kt:146)
at com.android.aaptcompiler.TableExtractor$extractResource$parseBagMethod$13.invoke(TableExtractor.kt:437)
at com.android.aaptcompiler.TableExtractor$extractResource$parseBagMethod$13.invoke(TableExtractor.kt:437)
at com.android.aaptcompiler.TableExtractor.extractResource(TableExtractor.kt:458)
at com.android.aaptcompiler.TableExtractor.extractResourceValues(TableExtractor.kt:267)
at com.android.aaptcompiler.TableExtractor.extract(TableExtractor.kt:182)
at com.android.aaptcompiler.ResourceCompiler.compileTable(ResourceCompiler.kt:186)
at com.android.aaptcompiler.ResourceCompiler.access$compileTable(ResourceCompiler.kt:1)
at com.android.aaptcompiler.ResourceCompiler$getCompileMethod$1.invoke(ResourceCompiler.kt:137)
at com.android.aaptcompiler.ResourceCompiler$getCompileMethod$1.invoke(ResourceCompiler.kt:137)
at com.android.aaptcompiler.ResourceCompiler.compileResource(ResourceCompiler.kt:123)
... 29 more
Thanks a lot
EDIT :
So, I've searched a lot, tried many things but none of them worked. Because my project is still small, I created a new project and copy/paste all my code and I this new project everything work and I don't have any error anymore.
Good luck if you encounter the same error.

Just had this error myself and after awhile managed to find the issue, I had strings within array-lists located in my strings.xml, some of my strings included apostrophes, for instance in don't won't can't.
Removing these allowed me to build my project again.

The solution that worked for me is locate the String.xml file. Delete the unused Strings I meant the strings that didnt had any reference in arrayList file.

Make sure gradle offline mode is not enabled.
Then do file->invalidate
then click invalidate and restart.
This should solve the issue

null Error on Build Log when trying to open project settings

I'm trying to open settings of the a project that someone left me in the company. When I click on Open Settings the Android Studio IDE fails and show a "null" error.
What I can do?? It says to me to "disabe android support plugin". I'm lost.
null
java.lang.StackOverflowError
at java.lang.Exception.<init>(Exception.java:54)
at java.lang.RuntimeException.<init>(RuntimeException.java:51)
at java.lang.NullPointerException.<init>(NullPointerException.java:60)
at java.lang.String.getBytes(String.java:917)
at com.intellij.openapi.util.io.FileSystemUtil$JnaUnixMediatorImpl$UnixLibC.lstat(Native Method)
at com.intellij.openapi.util.io.FileSystemUtil$JnaUnixMediatorImpl.getAttributes(FileSystemUtil.java:460)
at com.intellij.openapi.util.io.FileSystemUtil.getAttributes(FileSystemUtil.java:116)
at com.intellij.openapi.vfs.impl.local.LocalFileSystemBase.getAttributes(LocalFileSystemBase.java:769)
at com.intellij.openapi.vfs.impl.local.LocalFileSystemBase.isDirectory(LocalFileSystemBase.java:107)
at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:102)
at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.refreshAndFindChild(VirtualDirectoryImpl.java:284)
at com.intellij.openapi.vfs.newvfs.VfsImplUtil.refreshAndFindFileByPath(VfsImplUtil.java:131)
at com.intellij.openapi.vfs.impl.local.LocalFileSystemBase.refreshAndFindFileByPath(LocalFileSystemBase.java:56)
at com.intellij.openapi.vfs.impl.local.LocalFileSystemBase.refreshAndFindFileByIoFile(LocalFileSystemBase.java:211)
at...
The full stacktrace: Stacktrace Error

How to get the full information of runtime error instead of <Timeout exceeded getting exception details>?

So I'm trying out xamarin in VS2017, but found this undhandled error:
Unhandled Exception:
Java.Lang.SecurityException: <Timeout exceeded getting exception details>
This is very clueless. How can I get the full information of the runtime error like in Android Studio?

I had the same problem while calling some native API,
solved it by
Put a try catch around the block of got which is throwing the error.
Put a breakpoint in the catch block, you can get actual details of the exception.

After getting assistance from Microsoft, I finally found the solution.
TL;DR
Use VS Android device log and filter with "mono-rt" or "Error"
Complete Answer:
There are 2 solution:
1. Using Android Studio logcat:
Open the Android Studio logcat (View > Tool Windows > Logcat). From the logcat window, choose the device, choose the Xamarin.Android deployed application, and choose logcat for Error
Android logcat will display the runtime error:
2. Using Visual Studio Android Device Log:
Open the Visual Studio Android Device Log(Tools > Android > Device Log).
Here is the tricky bit: Unlike Android Studio, VS list all of the device log, not limited to the Xamarin.Android app deployed. So somehow we have to use the filter to get the relevant information. The problem is, what filter should we use? I used my application name and the error didn't show up. It turns out that when the error happen, the log doesn't contain any of the application name. Instead it has "mono-rt" tag with "Error" type.
So there you have it. Filter it with "mono-rt" tag or "Error" type and you will find the error information

How to fix error in android sdk - java.lang.StackOverflowError

Soon as I open eclipse, I get following error on popup:
Unknown exception in parseSdkContent.
java.lang.StackOverflowError
If I close this popup I get another popup saying the following:
A stack overflow error has occurred.
you are recommended to exit the workbench.
subsequent errors may happen and may terminate the workbench without warning.
see the .log file for more details.
So than I checked my .log file and it had a following error:
!ENTRY com.android.ide.eclipse.adt 4 0 2015-05-13 22:56:25.701
!MESSAGE Unknown exception in parseSdkContent.
!STACK 0
java.lang.StackOverflowError
at com.android.ide.eclipse.adt.internal.sdk.ProjectState.buildFullLibraryDependencies(ProjectState.java:682)
at com.android.ide.eclipse.adt.internal.sdk.ProjectState.buildFullLibraryDependencies(ProjectState.java:691)
at com.android.ide.eclipse.adt.internal.sdk.ProjectState.buildFullLibraryDependencies(ProjectState.java:691)
at com.android.ide.eclipse.adt.internal.sdk.ProjectState.buildFullLibraryDependencies(ProjectState.java:691)
at com.android.ide.eclipse.adt.internal.sdk.ProjectState.buildFullLibraryDependencies(ProjectState.java:691)
I already tried the following 5 things:
1) Re-install eclipse and reset my phone
2) Update android SDK Manager
3) Update ADT
4) Delete my .android folder
5) Use 'task manager' to end 'adb'. than I restart my adb using cmd.
But nothing is seem to be working. any ideas?

It is important to trace down memory leaks. We use canaryleaks in order to monitor objects that might cause problems in the future.
Take a look at this post, this might help you.
https://corner.squareup.com/2015/05/leak-canary.html

Error while trying to apportable iOS app to Android

I have been trying to port my first iOS app to Android with apportable.
I have solved alot of warnings and errors but cannot get rid of this last one.
The App I made is a fitness application for jogging so it uses CoreLocation.
Everything looks good when I run apportable now except this last error:
Build/android-armeabi-debug/com.apptonix.easyrunner/testTabbedWithCore/libtestTabbedWithCore.a(DetailViewController.m.o):/Users/peterbodlund/Documents/xcodeprojects/Training/inlamning5/testTabbedWithCore/testTabbedWithCore/DetailViewController.m:function L_OBJC_CLASSLIST_REFERENCES_$_114: error: undefined reference to 'OBJC_CLASS_$_MKPinAnnotationView'
scons: * [Build/android-armeabi-debug/EasyRunner/apk/lib/armeabi/libverde.so] Error 1
scons: building terminated because of errors.
Exception AttributeError: "'NoneType' object has no attribute 'pack'" in > ignored

Usually this is an indicator that there were link errors. Check your output higher up and look for missing symbol errors.
The build log is confusing because the build is parallel by default.
Add the option -j1 to cause the build to stop immediately after the first error.