敏捷Linux/Windows服务器的边缘渗透防御实施指南边缘渗透防御云边一体平台采购手册

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() } } ```