商城网站建设怎么建设,成都网站制作系统,长沙建网站需要多少钱,nodejs php wordpress目录Android防录屏和截屏关于WindowManager.LayoutParams.FLAG_SECURE关于Display.FLAG_SECUREiOS防录屏和截屏监听截屏录屏监听需求与安全总是对立的#xff0c;有新的需求#xff0c;就有新的接口开放#xff0c;但随之而来的就是利用新接口或者新接口的使用者#xff08…
目录Android防录屏和截屏关于WindowManager.LayoutParams.FLAG_SECURE关于Display.FLAG_SECUREiOS防录屏和截屏监听截屏录屏监听需求与安全总是对立的有新的需求就有新的接口开放但随之而来的就是利用新接口或者新接口的使用者app使用者不按预期出牌。 简单说我们打出了一把刀有人用来切菜有人用来砍柴有人却用来行凶… 大概是这个意思互联网软件行业特别多尤其是破解、攻击。 言归正传今天来探讨一下android和ios的防录屏。录屏接口的开放ios和android开放都比较迟早期系统都是没有的功能但随着用户的需求陆续都开放了录屏的接口。随之而来的就是应用安全-防录屏。典型的应用是金融、银行类的APP。
Android防录屏和截屏
Android比较容易只需要在 Activity 的onCreate() 方法中添加一行代码
getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);一般情况下哪些activity不希望被截屏添加上述代码当然多的话肯定是做一个BaseActivityBaseActivity中加这行代码就可以。当这样的activity在前台时用户启动截屏或录屏系统会提示安全而不能截屏或录屏。从源头就断掉了录屏和截屏。
关于WindowManager.LayoutParams.FLAG_SECURE /** Window flag: treat the content of the window as secure, preventing * it from appearing in screenshots or from being viewed on non-secure * displays. * * See {link android.view.Display#FLAG_SECURE} for more details about * secure surfaces and secure displays. */ public static final int FLAG_SECURE 0x00002000; 关于Display.FLAG_SECURE ** * Display flag: Indicates that the display has a secure video output and * supports compositing secure surfaces. * * If this flag is set then the display device has a secure video output * and is capable of showing secure surfaces. It may also be capable of * showing {link #FLAG_SUPPORTS_PROTECTED_BUFFERS protected buffers}. * * If this flag is not set then the display device may not have a secure video * output; the user may see a blank region on the screen instead of * the contents of secure surfaces or protected buffers. * * Secure surfaces are used to prevent content rendered into those surfaces * by applications from appearing in screenshots or from being viewed * on non-secure displays. Protected buffers are used by secure video decoders * for a similar purpose. * * An application creates a window with a secure surface by specifying the * {link WindowManager.LayoutParams#FLAG_SECURE} window flag. * Likewise, an application creates a {link SurfaceView} with a secure surface * by calling {link SurfaceView#setSecure} before attaching the secure view to * its containing window. * * An application can use the absence of this flag as a hint that it should not create * secure surfaces or protected buffers on this display because the content may * not be visible. For example, if the flag is not set then the application may * choose not to show content on this display, show an informative error message, * select an alternate content stream or adopt a different strategy for decoding * content that does not rely on secure surfaces or protected buffers. * * * see #getFlags */ public static final int FLAG_SECURE 1 1; iOS防录屏和截屏
ios 主要是以监听状态。
监听截屏
UIApplication中仅有用户截屏后的通知应用中只会收到已经截屏的通知并没办法干预(iOS8之后失效)。
// This notification is posted after the user takes a screenshot (for example by pressing both the home and lock screen buttons)
UIKIT_EXTERN NSNotificationName const UIApplicationUserDidTakeScreenshotNotification NS_AVAILABLE_IOS(7_0);监听到之后进行处理
-(void)viewDidAppear:(BOOL)animated{[super viewDidAppear:animated];[[NSNotificationCenter defaultCenter]addObserver:self selector:selector(screenshots) name:UIApplicationUserDidTakeScreenshotNotification object:nil];
}-(void)screenshots
{UIAlertView *alert [[UIAlertView alloc] initWithTitle:nil message:[安全提醒]内含个人资金账户。不要截图录制或分享给他人以保障资金账户安全。 delegate:nil cancelButtonTitle:nil otherButtonTitles:确定, nil];[alert show];-(void)dealloc
{[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationUserDidTakeScreenshotNotification object:nil];
}录屏监听
iOS 11 SDK 中新增了UIScreen的API用以告知应用当前屏幕正在录屏。当UIScreen.isCaptured 为true时表示当前屏幕正在被录制、镜像或被Airplay 发送。
当录屏状态发生变化时UIKit会发送UIScreenCapturedDidChange的notification。 基于此我们可以在应用中接收此通知来对用户的录屏行为做相应的处理
-(void)viewWillAppear:(BOOL)animated{[super viewWillAppear:animated];//检查当前设备是否处于录屏状态这里应该是需要定时器来获取否则只有加载的时候才会判断UIScreen * sc [UIScreen mainScreen];if (available(iOS 11.0, *)) {if (sc.isCaptured) {NSLog(录屏中);[self screenshots];}} else {}if (available(iOS 11.0, *)) {
//注册通知监测当前设备录屏状态发生变化[[NSNotificationCenter defaultCenter]addObserver:self selector:selector(screenshots) name:UIScreenCapturedDidChangeNotification object:nil];} else {}
}-(void) screenshots
{UIAlertView *alert [[UIAlertView alloc] initWithTitle:nil message:正在录屏请注意帐号密码安全问题 delegate:nil cancelButtonTitle:nil otherButtonTitles:确定, nil];[alert show];
}-(void)dealloc
{if (available(iOS 11.0, *)) {[[NSNotificationCenter defaultCenter] removeObserver:self name:UIScreenCapturedDidChangeNotification object:nil];} else {}
}部分引用 https://www.jianshu.com/p/a94969ddd1dc
