Unresolved reference: setLifecycleOwner in AndroidX

Question

MainActivity.kt: (41, 16): Unresolved reference: setLifecycleOwner

Task :app:buildInfoGeneratorDebug

My app uses AndroidX, in my gradle.properties:

android.useAndroidX=true
android.enableJetifier=true

My Code in onCreate function in MainActivity.tk:

val camera = findViewById<View>(R.id.camera)
    camera.setLifecycleOwner(this)

Trying to implment the CameraView.

What exactly is `this`? Is it an `androidx.appcompat.app.AppCompatActivity`? — CommonsWare, May 27 '19 at 16:00
@CommonsWare ``import androidx.appcompat.app.AppCompatActivity`` and the ``class MainActivity : AppCompatActivity() { }`` — Suisse, May 27 '19 at 16:16

score 2 · Accepted Answer · answered May 27 '19 at 16:24

2

You cast your library view type to android basic View which hasn't such method.
You should change your findViewById<View> to findViewById<CameraView>

answered May 27 '19 at 16:24

Merov

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Unresolved reference: setLifecycleOwner in AndroidX

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