Jetpack Compose 项目在我向其添加匿名 class 后无法构建

Question

I'm trying to add Jetpack Compose to my project, but after making all changes to my build.gradle file I'm not able to build it. And the reason is having anonymous classes in the project.

Instead of describing my project, build.gradle file and all changes I made, I used the android-compose-codelabs project as a sandbox.

So basically, I clone the BasicsCodelab project and can successfully build it, but after adding this block at the end of onCreate method ( MainActivity.kt ):

val listener = object : SearchView.OnQueryTextListener {
    override fun onQueryTextSubmit(query: String): Boolean {
        return false
    }
    override fun onQueryTextChange(newText: String): Boolean {
        return true
    }
}
SearchView(this).setOnQueryTextListener(listener)

and clearing the project I'm unable to build it anymore. So, adding an anonymous class to your project (with Jetpack Compose) leads to build failure.

Error:

LiveLiterals$MainActivityKt.class

    com.android.tools.r8.errors.b: Space characters in SimpleName 
    'Boolean$fun-onQueryTextSubmit$class-$no name provided$$val-listener$fun-onCreate$class-MainActivity' 
    are not allowed prior to DEX version 040

I assume the no name provided part is the reason (should be no-name-provided ?) but I'm not that familiar with building pipeline to figure out the problem. I tried to disable R8 but no result.

Answer 1

This was discussed a few times in Kotlinlang Slack this week, notably this thread and this thread .

This is a known bug tracked internally, though I don't see a public bug report for it in the issue tracker. The workaround is to make a regular named subclass, not an anonymous class:

class MyQueryTextListener : SearchView.OnQueryTextListener {
    override fun onQueryTextSubmit(query: String): Boolean {
        return false
    }
    override fun onQueryTextChange(newText: String): Boolean {
        return true
    }
}

val listener = MyQueryTextListener()

SearchView(this).setOnQueryTextListener(listener)

Answer 2

The issue is fixed in version 1.0.0-alpha02 of Jetpack Compose.