先上图
再看代码
package com.xiayiye5.composefirst.components
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material.*
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Menu
import androidx.compose.runtime.Composable
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import kotlinx.coroutines.launch
/*
* Copyright (c) 2022, [email protected] All Rights Reserved.
* # #
* # _oo0oo_ #
* # o8888888o #
* # 88" . "88 #
* # (| -_- |) #
* # 0\ = /0 #
* # ___/`---'\___ #
* # .' \\| |# '. #
* # / \\||| : |||# \ #
* # / _||||| -:- |||||- \ #
* # | | \\\ - #/ | | #
* # | \_| ''\---/'' |_/ | #
* # \ .-\__ '-' ___/-. / #
* # ___'. .' /--.--\ `. .'___ #
* # ."" '< `.___\_<|>_/___.' >' "". #
* # | | : `- \`.;`\ _ /`;.`/ - ` : | | #
* # \ \ `_. \_ __\ /__ _/ .-` / / #
* # =====`-.____`.___ \_____/___.-`___.-'===== #
* # `=---=' #
* # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
* # #
* # 佛祖保佑 永无BUG #
* # #
*/
/**
* @author 下一页5(轻飞扬)
* 创建时间:2022/5/9 19:38
* 个人小站:http://yhsh.wap.ai(已挂)
* 最新小站:http://www.iyhsh.icoc.in
* 联系作者:企鹅 13343401268
* 博客地址:http://blog.csdn.net/xiayiye5
* 项目名称:ComposeFirst
* 文件包名:com.xiayiye5.composefirst.components
* 文件说明:BackDropScaffold基本用法
*/
@OptIn(ExperimentalMaterialApi::class)
@Composable
fun BackDropScaffoldSamples() {
val scope = rememberCoroutineScope()
val state = rememberBackdropScaffoldState(BackdropValue.Concealed)
BackdropScaffold(scaffoldState = state,
appBar = {
TopAppBar(navigationIcon = {
Icon(
imageVector = Icons.Default.Menu,
contentDescription = null, Modifier.clickable {
scope.launch {
if (state.isConcealed) {
//如果关闭了就打开
state.reveal()
} else {
//如果打开了就关闭
state.conceal()
}
}
}
)
}, title = { Text(text = "点击试一下") })
},
backLayerContent = {
LazyColumn() {
items(20) {
ListItem(text = { Text(text = "我是后面内容$it", Modifier.background(Color.Red)) })
}
}
}, frontLayerContent = {
Text("我是前面的内容", modifier = Modifier.background(Color.Green))
}, modifier = Modifier.height(300.dp)
)
}
@Preview
@Composable
fun BackDropScaffoldSamplesPreview() {
BackDropScaffoldSamples()
}