React-Native Build Failed app:mergeDebugAssets

Question

I completed a react-native app for Android, and now when I try to

run npm android, I get this error:

 FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeDebugAssets'.
> Error: java.lang.RuntimeException: java.lang.RuntimeException: java.nio.file.AccessDeniedException:
C:\Users\SONY\AwesomeProject\android\app\build\intermediates\merged_assets\debug\mergeDebugAssets\out\fonts

Please can you help me?

Many Thanks

React-native

Caused by: java.nio.file.AccessDeniedException: C:\Users\SONY\AwesomeProject\android\app\build\intermediates\merged_assets\debug\mergeDebugAssets\out\fonts at com.android.ide.common.resources.MergedAssetWriter$AssetWorkAction.run(MergedAssetWriter.java:84) ... 1 more

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:mergeDebugAssets'.

  Error: java.lang.RuntimeException: java.lang.RuntimeException: java.nio.file.AccessDeniedException: C:\Users\SONY\AwesomeProject\android\app\build\intermediates\merged_assets\debug\mergeDebugAssets\out\fonts

I want to successfully build the android app

Answer 1

Try running this inside your project directory:

1. cd android
2. gradlew clean
3. cd..
4. react-native run-android

Answer 2

I had this issue and for me ./gradlew clean didn't help.

But I found a file called assets in android/app/src/main that git showed as untracked. When I removed the assets file I could build the project without problems again.

I use Android Studio for debugging java code and I would guess that is why the assets file was created.

Answer 3

For Linux / MacOS- ./gradlew clean

Windows PowerShell- .\gradlew clean

Windows cmd- gradlew clean

Answer 4

If you have installed react-native-vector-icons, try to unlink it by using this command

react-native unlink react-native-vector-icons