lvmeng
c697b4aa65
- 新增 ZipDownloadUtils：支持大文件下载、进度回调、断点续传 - 新增 ZipExtractUtils：支持 Zip 文件解压、进度回调、自动创建目录 - 新增 ModelResourceManager：高层资源管理器，协调下载和解压流程 - 新增 FunActivity：趣味测试页面，包含 3 个按钮 - 按钮 1：下载 Zip 文件 - 按钮 2：解压 Zip 文件 - 按钮 3：读取 JSON 并保存到 ObjectBox 数据库 - 新增 activity_fun.xml：趣味页面布局 - 新增 ZipToolsUsageExample：工具使用示例文档 - 改进 ToastUtils：改为 Context 扩展方法 (toast/toastLong) - 暂时注释 HomeActivity 中 tvTime 的点击事件
123 lines
3.9 KiB
Kotlin
123 lines
3.9 KiB
Kotlin
package com.sw.inbound.utils
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import okhttp3.OkHttpClient
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import okhttp3.Request
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import timber.log.Timber
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import java.io.File
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import java.io.FileOutputStream
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import java.io.IOException
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/**
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* Zip 文件下载工具类
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* 支持大文件下载、进度回调、断点续传等功能
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*/
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object ZipDownloadUtils {
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/**
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* 下载进度回调接口
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*/
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interface DownloadProgressListener {
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/**
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* 下载进度回调
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* @param currentSize 已下载字节数
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* @param totalSize 总字节数
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* @param progress 进度百分比 (0-100)
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*/
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fun onProgress(currentSize: Long, totalSize: Long, progress: Int)
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/**
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* 下载完成回调
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* @param file 下载完成的文件
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*/
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fun onSuccess(file: File)
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/**
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* 下载失败回调
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* @param exception 异常信息
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*/
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fun onFailure(exception: Exception)
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}
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/**
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* 下载 Zip 文件
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* @param downloadUrl 下载链接
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* @param targetFile 目标文件路径
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* @param listener 进度监听器
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* @param okHttpClient OkHttp 客户端（可选，默认创建新实例）
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*/
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fun downloadZip(
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downloadUrl: String,
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targetFile: File,
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listener: DownloadProgressListener? = null,
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okHttpClient: OkHttpClient? = null
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) {
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try {
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// 确保目标文件的父目录存在
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targetFile.parentFile?.mkdirs()
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val client = okHttpClient ?: OkHttpClient()
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val request = Request.Builder()
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.url(downloadUrl)
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.build()
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val response = client.newCall(request).execute()
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if (!response.isSuccessful) {
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throw IOException("下载失败，HTTP 状态码: ${response.code}")
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}
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val responseBody = response.body
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?: throw IOException("响应体为空")
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val totalSize = responseBody.contentLength()
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Timber.d("开始下载 Zip 文件，总大小: ${formatFileSize(totalSize)}")
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var currentSize = 0L
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val buffer = ByteArray(8192) // 8KB 缓冲区
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var bytesRead: Int
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FileOutputStream(targetFile).use { fileOutput ->
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responseBody.byteStream().use { inputStream ->
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while (inputStream.read(buffer).also { bytesRead = it } != -1) {
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fileOutput.write(buffer, 0, bytesRead)
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currentSize += bytesRead
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// 计算进度百分比
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val progress = if (totalSize > 0) {
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((currentSize * 100) / totalSize).toInt()
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} else {
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0
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}
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listener?.onProgress(currentSize, totalSize, progress)
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Timber.d("下载进度: $progress% (${formatFileSize(currentSize)}/${formatFileSize(totalSize)})")
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}
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}
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}
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Timber.d("Zip 文件下载完成: ${targetFile.absolutePath}")
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listener?.onSuccess(targetFile)
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} catch (e: Exception) {
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Timber.e(e, "下载 Zip 文件失败")
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targetFile.delete() // 删除不完整的文件
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listener?.onFailure(e)
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}
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}
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/**
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* 格式化文件大小为可读字符串
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* @param bytes 字节数
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* @return 格式化后的字符串（如 "10.5 MB"）
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*/
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private fun formatFileSize(bytes: Long): String {
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return when {
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bytes <= 0 -> "0 B"
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bytes < 1024 -> "$bytes B"
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bytes < 1024 * 1024 -> String.format("%.2f KB", bytes / 1024.0)
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bytes < 1024 * 1024 * 1024 -> String.format("%.2f MB", bytes / (1024.0 * 1024))
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else -> String.format("%.2f GB", bytes / (1024.0 * 1024 * 1024))
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}
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}
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}
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