Develop Reference

Build error related to Jar file in Flutter

I am working on flutter and trying to include map_view in my app. But I have a build error as:
FAILURE: Build failed with an exception.
* What went wrong:
Could not resolve all files for configuration ':map_view:androidApis'.
> Failed to transform file 'android.jar' to match attributes {artifactType=android-platform-attr} using transform PlatformAttrTransform
> java.io.FileNotFoundException: C:\Users\Harsh Goyal\AppData\Local\Android\sdk\platforms\android-27\android.jar (The system cannot find the file specified)
It seems to be related to some missing file. I dont know what to do and can't find any solutions!
Any help is appreciated. :)

I just reinstalled my Android SDK and everything worked perfectly. An answer was posted on a github issue where I posted this question. Here is the link in case it is required:
https://github.com/apptreesoftware/flutter_google_map_view/issues/129#issuecomment-500956688

android.jar file must be broken or missing.
Download and paste .jar file from https://github.com/Sable/android-platforms according to your api level.
Usually you don't need to restart. If doesn't works, restart and retry

Error: app:mergeClient_flavourDebugResources

I am building an adroid project using clean assemble command on Jenkins.
My build is failing each time I run showing this error. Can anyone help me or tell me how can I resolve error related to app: and proguard.
Here is the part of log that shows error.
Error: Some file crunching failed, see logs for details
:app:mergeClient_flavourDebugResources FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:mergeClient_flavourDebugResources'.
> Error: Some file crunching failed, see logs for details

You must be using some resource with unsupported characters in the file name. Check the names of your files in res folder of your project.
It can also happen sometimes if you are using 9-patch image in your project.
If you are using 9-patch image in the project then modify that image slightly with 9-patch editor of android studio and then try to build project.

Error:Execution failed for task ':app:transformClassesWithMultidexlistForDebugAndroidTest'

I am not able to figure out why this error is coming
Here is full error
Error:Execution failed for task
':app:transformClassesWithMultidexlistForDebugAndroidTest'.
> java.io.IOException: The output jar is empty. Did you specify the proper
'-keep' options?
My gradle android project was not having "androidTest" so I created manually and test folder here is screenshot of folder structure

I would not consider it as perfect answer but this is what i did.
I removed testInstrumentationRunner="android.support.test.runner....." from build.gradle file and restarted
It starts working :)
It is just for information

Android Error Cannot resolve symbol 'R'

I am having trouble with getting rid of the error Cannot resolve symbol 'R'. I have done some research but none has worked. Among the tips i have tried out include Tools->Android->Sync Project with Gradle Files after which I executed the Build->Clean Project. The clean project command resulted with the following error;
Execution failed for task ':app:mergeDebugResources'. > Crunching Cruncher abc_btn_radio_to_on_mtrl_000.png failed
My xml files have the following error:
NOTE: This project contains Java compilation errors, which can cause rendering failures for custom views. Fix compilation problems first
Exception raised during rendering: action_bar
What might I be missing? I will appreciate any help or pointers.

In the comments above, #Udit posted a link to another sort of related question from which I was able to get a solution. Incase you run into a similar problem, the solution is quite simple. Reboot Android Studio and then go to Build->Rebuild Project. Hope this will sort out your issue as it did mine. Thank you all for your contribution.

Execution failed for task ':app:mergeDebugResources'. > Crunching
Cruncher abc_btn_radio_to_on_mtrl_000.png failed
--->Is this error message from the gradle console?
Because this happened to me once when the PNG file I used wasn't a "pure" PNG file. Like for example: An image I found from the internet that wasn't really a PNG file(ex: jpg/Gif image) but I just renamed it to to a ".PNG" file upon saving it then directly copied this to res/drawable. So to fix this I deleted the image and used a real PNG file by either editing it on Photoshop or a real png file from the internet or whatever and then did #Biko's advice which was to Reboot Android Studio and then go to Build->Rebuild Project.

Blocked with Android studio compilation issue ManifestMerger2$MergeFailureException

With Android studio v0.8.2, I am blocked with the following exception. With the beta release it was working very well. I have updated my IDE to 0.8.2 and deleted my target directory and trying to build again. I am struck now.
Execution failed for task ':app:processDebugManifest'.
com.android.manifmerger.ManifestMerger2$MergeFailureException: java.io.FileNotFoundException: /home/gopinath/code/bitbucket/android/productionapp/build/intermediates/exploded-aar/com.jakewharton.hugo/hugo-runtime/1.1.0/AndroidManifest.xml (No such file or directory)
As reported by the error, the file is actually missing in the mentioned path. For my other project in which I have hugo-runtime, the file exists and compilation is proper.
Is anyone else facing this issue? Is there a workaround for this?

Click the build tab and clean Project. Boom!

Posting so that it might help others:
I ran into this issue as well. The error is from ManifestMerger and it made me believe it has something to do with my manifest file and that took me on a wrong path. This error can also happen in case of an invalid XML file in your resources. In my case it was a layout file that got left over from a merge conflict with nothing in it (an empty layout file) which in turn caused the issue. it also cloud be any other xml file so I would suggest opening your xml resources one at a time and see if there is any error in them (you will get the lint error when opening the file)