Cannot access 'androidx.activity.result.ActivityResultCaller'

Question

I'm using androidx for quite a while and my Android project compiles fine, however recently my Android Studio throws tons of red for all Activity classes

because of

cannot access 'androidx.activity.result.ActivityResultCaller' which is a supertype of ...

I use

AppCompatActivity from androidx.appcompat:appcompat:1.1.0

My build.gradle has:

    ext.kotlin_version = '1.3.71'
    ...
    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.3'
        classpath 'com.google.gms:google-services:4.3.3'

And gradle version distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip

My gradle.properties:

android.useAndroidX=true
android.enableJetifier=true
org.gradle.jvmargs=-Xmx4608m
org.gradle.parallel=true

# Use kapt in parallel
kapt.use.worker.api=true

# Kapt compile avoidance
kapt.include.compile.classpath=false

Answer 1

This happened because of Gradle when resolving dependency libraries versions upgraded androidx.core:core to version more than 1.2.0, probably to 1.3.0-beta01 or 1.3.0-rc01

AppCompatActivity extends FragmentActivity that extends ComponentActivity that extends androidx.core.app.ComponentActivity that implements ActivityResultCaller introduced in androidx.activity:activity:1.2.0-alpha03 only.

To resolve this issue add this dependency to your module build.gradle:

dependencies {
      implementation "androidx.activity:activity-ktx:1.2.0-alpha03"
}