RegionBlockScreen.kt

package dev.aaa1115910.bv.screen

import android.app.Activity
import android.graphics.BitmapFactory
import androidx.compose.foundation.Image
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.LaunchedEffect
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.graphics.Color
import androidx.compose.ui.graphics.ImageBitmap
import androidx.compose.ui.graphics.ImageBitmapConfig
import androidx.compose.ui.graphics.asImageBitmap
import androidx.compose.ui.graphics.toArgb
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import dev.aaa1115910.bv.R
import dev.aaa1115910.bv.ui.theme.BVTheme
import io.github.g0dkar.qrcode.QRCode
import io.github.g0dkar.qrcode.render.Colors
import okhttp3.internal.toHexString
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import kotlin.system.exitProcess

@Composable
fun RegionBlockScreen(
    modifier: Modifier = Modifier
) {
    val context = LocalContext.current
    var qrImage by remember { mutableStateOf(ImageBitmap(1, 1, ImageBitmapConfig.Argb8888)) }
    val primaryColorHex =
        "#" + MaterialTheme.colorScheme.primary.toArgb().toHexString().substring(2)

    LaunchedEffect(Unit) {
        println(primaryColorHex)
        val output = ByteArrayOutputStream()
        QRCode("扫码也没有用的！")
            .render(darkColor = Colors.css(primaryColorHex))
            .writeImage(output)
        val input = ByteArrayInputStream(output.toByteArray())
        qrImage = BitmapFactory.decodeStream(input).asImageBitmap()
    }

    DisposableEffect(key1 = Unit) {
        onDispose {
            (context as Activity).finish()
            exitProcess(0)
        }
    }

    Surface(
        modifier = modifier,
        color = MaterialTheme.colorScheme.primary
    ) {
        Box(
            modifier = Modifier
                .fillMaxSize()
                .padding(84.dp),
            contentAlignment = Alignment.CenterStart
        ) {
            Column(
                verticalArrangement = Arrangement.spacedBy(24.dp)
            ) {
                Text(
                    text = stringResource(R.string.region_block_character_painting),
                    fontSize = 100.sp
                )
                Column {
                    Text(
                        text = stringResource(R.string.region_block_title),
                        style = MaterialTheme.typography.titleLarge
                    )
                    Text(
                        text = stringResource(R.string.region_block_subtitle),
                        style = MaterialTheme.typography.titleLarge
                    )
                }
                Row(
                    horizontalArrangement = Arrangement.spacedBy(12.dp)
                ) {
                    Box(
                        modifier = Modifier
                            .size(80.dp)
                            .background(Color.White),
                        contentAlignment = Alignment.Center
                    ) {
                        Image(
                            modifier = Modifier.size(64.dp),
                            bitmap = qrImage,
                            contentDescription = null
                        )
                    }
                    Column {
                        Text(text = stringResource(R.string.region_block_solution_title))
                        Text(text = stringResource(R.string.region_block_solution_text))
                    }
                }
            }
        }
    }
}

@Preview(device = "id:tv_1080p")
@Composable
private fun RegionBlockScreenPreview() {
    BVTheme {
        RegionBlockScreen()
    }
}