ERROR: In <declare-styleable> NavArgument, unable to find attribute type

Question

I'm trying to integrate these libraries into my Android project to make a navigation controller. When I add in these two lines to my build.gradle -

implementation 'android.arch.navigation:navigation-fragment:1.0.0-alpha01' implementation 'android.arch.navigation:navigation-ui:1.0.0-alpha01'

It syncs ok, but in build I get this error:

ERROR: In NavArgument, unable to find attribute type.

I was able to build Google's sample project that uses the relevant libraries without problems.

My project has:

• androidSupportLibrary 27.1.1
• projectTargetVersion 27
• projectCompileSdkVersion android-P
• projectBuildToolsVersion 27.0.2
• gradleVersion 3.0.1
• gradlePlugin 4.4

I've already tried upgrading all these versions^, doing a clean build, restarting Android Studio, etc.

I also get some Java compiler errors.

Any thoughts on why this might happen?

Answer 1

You need to add the navigation value in your project :

add navigation xml

and after that, if you have an error

invalid resource directory name: ..../res/merged/debug navigation

you need to remove android.enableAapt2=false from your gradle.properties