Special Page Black Screen (Password Page)

Screen Mirroring Black Screen Phenomenon Description

During remote screen mirroring, you may encounter certain specific pages displaying as black screen, which is part of the system's normal security protection mechanism.

Common Black Screen Scenarios

• Password input pages (lock screen, payment, application login, etc.)
• Banking and financial application interfaces
• Security-sensitive software internal pages
• System-level privacy protection pages

Black Screen Cause Analysis

Black screen occurs due to the combined effect of the following security mechanisms:

1. System-level Screenshot Restrictions
   • Sensitive pages actively set FLAG_SECURE flag
   • Prohibit ordinary applications from taking screenshots
   • System screenshot permissions relied on by remote screen mirroring cannot obtain screen data
2. Privacy Protection Mechanism
   • Prevent malicious software from stealing sensitive information
   • Ensure passwords, payment information, etc. are not captured
   • Comply with various platform security specification requirements
3. Application Layer Security Policy
   • Banking and financial applications forcibly enable black screen protection
   • Some enterprise applications set restrictions for data security
   • System critical operation interfaces have default protection

Technical Explanation

This is a design feature of Android/HarmonyOS/iOS systems, not a functional limitation of Cloud Control App. All remote control software will encounter the same black screen phenomenon on such pages, reflecting the system's high level of protection for user privacy.

Feasible Solutions

Automated Script Operation

• For invisible password interfaces, automated scripts can be prepared in advance;
• Execute scripts in Cloud Control Background to automatically complete password input or other operations;
• Does not rely on system screenshot permissions, suitable for remote operation of own phone or assisting others.

Real-time Layout Analysis Display Interface Structure

• Even if the screen is black, layout information can be obtained;
• Understand the approximate interface layout of the screen, including button and input box coordinates;
• Can perform clicks or input through familiar layout analysis operations;
• Note: Some pages may not have layout information and need to be combined with other methods;
• In Cloud Control Background → Group Control Screen Mirroring Page, select the device to operate, right-click to open Layout Analysis Page;
  • Lower left corner can select Video;
  • Enable Auto Layout;
  • Click Layout Analysis according to requirements to see real-time layout analysis results;
  • At this point, remote touch operations can be performed, such as clicking, sliding, etc.

Real-time Screenshot Display Screen

Use the following alternative screenshot methods to display phone screen in real-time in the background (may have slight delay):

• HID Screenshot
• Accessibility Screenshot
• Digital Assistant Screenshot (Recommended)
• ADB Screenshot
• Root Screenshot

💡 Tip: Digital Assistant screenshot method has better compatibility, moderate delay, suitable for most scenarios.

• In Cloud Control Background → Group Control Screen Mirroring Page, select the device to operate, right-click to open Layout Analysis Page;
  • Lower left corner can select Image;
  • Enable Auto Image;
  • Click Screenshot according to requirements to see real-time phone screen;
  • At this point, remote touch operations can be performed, such as clicking, sliding, etc.

Precautions

• All methods can be operated and displayed in real-time in the background, but password pages or protected interfaces may still have delays;
• For critical operations, it is recommended to test scripts or screenshot methods in advance to ensure stable and reliable remote operation.