MutableWindowInsets

import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.MutableWindowInsets
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.asPaddingValues
import androidx.compose.foundation.layout.exclude
import androidx.compose.foundation.layout.navigationBars
import androidx.compose.foundation.layout.navigationBarsPadding
import androidx.compose.foundation.layout.onConsumedWindowInsetsChanged
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeContent
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.core.view.WindowCompat

class SampleActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        WindowCompat.setDecorFitsSystemWindows(window, false)
        super.onCreate(savedInstanceState)
        setContent {
            val remainingInsets = remember { MutableWindowInsets() }
            val safeContent = WindowInsets.safeContent
            Box(
                Modifier.navigationBarsPadding().onConsumedWindowInsetsChanged {
                    consumedWindowInsets ->
                    remainingInsets.insets = safeContent.exclude(consumedWindowInsets)
                }
            ) {
                // padding can be used without recomposition when insets change.
                val padding = remainingInsets.asPaddingValues()
                Box(Modifier.padding(padding))
            }
        }
    }
}