iOS・Androidのスクショを検知・無効化する方法

snapchat的な

iOS

検知

ViewController.swift

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        NotificationCenter.default.addObserver(self, selector: #selector(didScreenshot), name: .UIApplicationUserDidTakeScreenshot, object: nil)
    }

    func didScreenshot(notification: Notification) {
        print("didScreenshot")
    }
}

Android

無効化

MainActivity.java

Window window = getWindow();
window.addFlags(WindowManager.LayoutParams.FLAG_SECURE);