LegacyActivityExternal.kt

package com.leonidivankin.draftandroid.articles.refactoring

import android.os.Bundle
import android.view.View
import androidx.activity.compose.setContent
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import androidx.compose.ui.viewinterop.AndroidView
import com.leonidivankin.draftandroid.R

class LegacyActivityExternal : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        title = "LegacyActivity, external"
        setContent { ExternalPart() }
    }
}

@Composable
private fun ExternalPart() {
    Box(
        Modifier
            .fillMaxSize()
            .background(color = Color(0xFFF44336))
            .padding(32.dp)
    ) {
        Box(
            Modifier
                .fillMaxSize()
                .background(color = Color(0xFF9C27B0))
                .padding(32.dp)
        ) {
            AndroidView(
                modifier = Modifier.fillMaxSize(),
                factory = { context ->
                    View.inflate(context, R.layout.internal_part, null)
                }
            )
        }
    }
}