安卓使用OkHttp和协程下载多个文件

dependencies {
    implementation 'com.squareup.okhttp3:okhttp:4.9.1'
}

import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.async
import kotlinx.coroutines.awaitAll
import kotlinx.coroutines.withContext
import okhttp3.OkHttpClient
import okhttp3.Request
import java.io.File

suspend fun downloadFiles(urls: List<String>, destinationDir: String) = withContext(Dispatchers.IO) {
    val client = OkHttpClient()
    val requests = urls.map { url ->
        val request = Request.Builder()
            .url(url)
            .build()
        client.newCall(request)
    }
    val responses = requests.map { request ->
        async {
            client.newCall(request).execute()
        }
    }.awaitAll()
    responses.forEachIndexed { index, response ->
        val file = File(destinationDir, "file_$index")
        response.body?.byteStream()?.use { inputStream ->
            file.outputStream().use { outputStream ->
                inputStream.copyTo(outputStream)
            }
        }
    }
}

val urls = listOf(
    "https://example.com/file1.txt",
    "https://example.com/file2.txt",
    "https://example.com/file3.txt"
)
val destinationDir = "/path/to/destination/dir"
GlobalScope.launch {
    try {
        downloadFiles(urls, destinationDir)
        // 下载完成后的处理逻辑
    } catch (e: Exception) {
        // 错误处理逻辑
    }
}