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id="@+id/download_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="16dp"> android:id="@+id/download_button_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/download" /> android:id="@+id/download_progress" android:layout_width="wrap_content" android:layout_height="wrap_content" android:visibility="gone" /> ``` ```kotlin private fun downloadApk() { val button = findViewById(R.id.download_button_text) val progressBar = findViewById(R.id.download_progress) button.isEnabled = false progressBar.visibility = View.VISIBLE // Replace "YOUR_APK_URL" with the actual URL of the APK file to download val url = "YOUR_APK_URL" val storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) val fileName = "hua_run.apk" val request = DownloadManager.Request(Uri.parse(url)) request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName) request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED) val downloadManager = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager val downloadId = downloadManager.enqueue(request) val broadcastReceiver = object : BroadcastReceiver() { override fun onReceive(context: Context?, intent: Intent?) { val id = intent?.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1) if (id == downloadId) { unregisterReceiver(this) Toast.makeText(this@MainActivity, "Download complete", Toast.LENGTH_SHORT).show() button.isEnabled = true progressBar.visibility = View.GONE } } } registerReceiver(broadcastReceiver, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)) } ``` iOS ```swift import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() let button = UIButton(frame: CGRect(x: 100, y: 100, width: 100, height: 50)) button.setTitle("Download", for: .normal) button.addTarget(self, action: selector(downloadApk), for: .touchUpInside) view.addSubview(button) } @objc func downloadApk() { guard let url = URL(string: "YOUR_APK_URL") else { return } let task = URLSession.shared.downloadTask(with: url) { (location, response, error) in if let error = error { print("Error downloading file: \(error.localizedDescription)") return } guard let location = location else { return } do { let data = try Data(contentsOf: location) // S影音e the data to the user's device let documentsPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] let filePath = documentsPath.appendingPathComponent("hua_run.apk") try data.write(to: filePath, options: .atomic) // Open the file in the default app for viewing let fileURL = URL(fileURLWithPath: filePath.path) let activityViewController = UIActivityViewController(activityItems: [fileURL], applicationActivities: nil) present(activityViewController, animated: true) } catch { print("Error s视频ing file: \(error.localizedDescription)") } } task.resume() } } ```云汇品牌客服高可用动态加速平台内容审核流程选型手册多端内容管理接口自动化测试部署清单