Compose中弹出对话框

infinite_novel.kt

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Button
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import androidx.compose.ui.window.DialogProperties
import androidx.compose.material3.AlertDialog
import androidx.compose.runtime.Composable

// 主界面
@Composable
fun NovelDialogScreen() {
    // 状态管理：控制对话框是否显示
    var showDialog by remember { mutableStateOf(false) }

    Column(
        modifier = Modifier
            .fillMaxSize()
            .padding(24.dp),
        horizontalAlignment = Alignment.CenterHorizontally,
        verticalArrangement = Arrangement.Center
    ) {
        // 触发对话框的按钮
        Button(onClick = { showDialog = true }) {
            Text("显示对话框")
        }

        // 对话框组件（Compose微件）
        if (showDialog) {
            AlertDialog(
                // 对话框标题
                title = {
                    Text(
                        text = "主神空间",
                        style = MaterialTheme.typography.headlineSmall
                    )
                },
                // 对话框内容
                text = {
                    Text(
                        text = "你想知道生命的意义吗，你想真正地活着吗？",
                        style = MaterialTheme.typography.bodyLarge
                    )
                },
                // 确认按钮（是）
                confirmButton = {
                    Button(
                        onClick = {
                            showDialog = false
                            // 这里可以添加"是"的逻辑，如打开《无限恐怖》
                            openUrl("https://www.qidian.com/book/1003118186/")
                        }
                    ) {
                        Text("是")
                    }
                },
                // 取消按钮（否）
                dismissButton = {
                    Button(
                        onClick = {
                            showDialog = false
                            // 这里可以添加"否"的逻辑，如打开《无限曙光》
                            openUrl("https://www.qidian.com/book/1004618281/")
                        }
                    ) {
                        Text("否")
                    }
                },
                // 对话框属性配置
                properties = DialogProperties(
                    // 点击外部是否关闭对话框
                    dismissOnClickOutside = false,
                    // 按返回键是否关闭对话框
                    dismissOnBackPress = true
                ),
                // 对话框关闭回调
                onDismissRequest = {
                    showDialog = false
                }
            )
        }
    }
}

// 跨平台打开URL的声明（需要平台实现）
expect fun openUrl(url: String)