```public class MainActivity extends Activity implements SurfaceTextureListener```

# android

[Willy Njundong]

public class MainActivity extends Activity implements SurfaceTextureListener

[rkeazor]

public class MainActivity : Activity(), SurfaceTextureListener

[gildor]

also #getting-started is better channel for such questions

[gildor]

And I would just recommend to read Kotlin reference, it’s very well written and easy to understand
https://kotlinlang.org/docs/reference/