IssueTracker

Component used: Fragment, ComponentDialog

Version used: 1.6.0

Devices/Android versions reproduced on:

• Android Studio 2022.2.1 Patch 2
• compileSdk 33
• minSdk 28
• targetSdk 33
• Kotlin compiler 1.6.20 and 1.6.10

After upgrading androidx.fragment to 1.6.0 from 1.5.5, I am unable to compile when attempting to subclass ComponentDialog. An error is generated that says:

Class 'MyComponentDialog’ is not abstract and does not implement abstract base class member public abstract val lifecycle: Lifecycle defined in androidx.activity.ComponentDialog

If I convert MyComponentDialog to Java, it works as expected.

I copied the source code for ComponentDialog and commented out the references to ViewTreeLifecycleOwner (since I don’t have access to that) and found the compiler generated the same error for ComponentDialog itself.

In ComponentDialog, if I replace:

final override fun getLifecycle(): Lifecycle = lifecycleRegistry

with

final override val lifecycle: Lifecycle = lifecycleRegistry

the compiler no longer complains and the class can be extended.

The problem can be easily demonstrated with the following Kotlin code:

package com.problem

import android.content.context
import androidx.activity.ComponentDialog

class MyComponentDialog @JvmOverloads constructor(
    context: Context,
    theme: Int = 0
) : ComponentDialog(context, theme) {
    // Nothing special needed to show the problem
}

Other than converting MyComponentDialog to Java, I could not find a solution.