SampleModalBottomSheet

MainActivity.kt

package com.example.testmbs

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.foundation.layout.asPaddingValues
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.navigationBars
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentHeight
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material3.BottomSheetDefaults
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.ModalBottomSheet
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.material3.rememberModalBottomSheetState
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import com.example.testmbs.ui.theme.MyTestTheme

class MainActivity : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        enableEdgeToEdge()

        setContent {
            MyTestTheme {
                Box {
                    var opened by remember { mutableStateOf(true) }

                    Column(
                        modifier = Modifier.verticalScroll(rememberScrollState())
                    ) {
                        for (i in 1..40) {
                            Text(
                                modifier = Modifier
                                    .clickable { opened = true }
                                    .background(if (i % 2 == 0) Color.Gray else Color.LightGray)
                                    .fillMaxWidth()
                                    .padding(16.dp),
                                text = "Item $i"
                            )
                        }
                    }

                    if (opened)
                        SampleModalBottomSheet(
                            onDismissRequest = { opened = false },
                            content = {
                                Column {
                                    for (i in 1..4) {
                                        Text(
                                            modifier = Modifier
                                                .background(if (i % 2 == 0) Color.Gray else Color.LightGray)
                                                .fillMaxWidth()
                                                .padding(16.dp),
                                            text = "Item $i"
                                        )
                                    }
                                }
                            }
                        )
                }
            }
        }
    }
}

@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun SampleModalBottomSheet(
    modifier: Modifier = Modifier,
    onDismissRequest: () -> Unit,
    content: @Composable () -> Unit
) {
    val bottomPadding = WindowInsets.navigationBars.asPaddingValues()

    ModalBottomSheet(
        onDismissRequest = onDismissRequest,
        windowInsets = WindowInsets(bottom = 0.dp),
        sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true),
        dragHandle = { BottomSheetDefaults.DragHandle() },
        modifier = modifier.wrapContentHeight(),
    ) {

        Surface(
            color = Color.Transparent,
            modifier = Modifier
                .padding(bottomPadding)
                .padding(horizontal = 24.dp)
        ) {
            content()
        }
    }
}