How to pop back stack when button is pressed on Jetpack Compose

Issue

I have a compose screen in a fragment, and in that screen there is a button.

I want to dismiss the fragment/go back to previous screen when this button is pressed.

But I can't access any activity/fragment methods inside onClick.

How can I do that?

@AndroidEntryPoint
class MyFragment @Inject constructor() : Fragment(){

    @ExperimentalComposeUiApi
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        return ComposeView(requireContext()).apply {
            this.setContent {
                Button(
                    onClick = {
                        //Dismiss fragment.
                    },
                ) {
                    Text(
                        "Click me"
                    )
                }
            }
        }
    }
}

Solution

You can get the context inside any composable with LocalContext. You can get activity from this one, so you can use onBackPressed() or navigate in an other way:

val context = LocalContext.current
Button(
    onClick = {
        context.findActivity()?.onBackPressed()
    },
) {
    Text(
        "Click me"
    )
}

findActivity:

fun Context.findActivity(): Activity? {
    var context = this
    while (context is ContextWrapper) {
        if (context is Activity) return context
        context = context.baseContext
    }
    return null
}

Answered By - Philip Dukhov