Force External USB UVC Camera as Only System Camera (Pixel 8a – EvolutionX 15)

  • Status: Closed
  • Prize: $666
  • Entries Received: 2
  • Winner: redspector

Contest Brief

IMPORTANT UPDATE – READ CAREFULLY

This is NOT a design contest.

This project was mistakenly posted as a contest. It is actually a highly technical Android development task.

Only serious Android developers with experience in LSPosed, Zygisk, Magisk modules and Camera2 internals should participate.

Generic diagrams, flowcharts, AI-generated explanations or conceptual images will NOT be considered valid submissions.

Technical Objective

Device: Pixel 8a (akita)
ROM: EvolutionX 15 (Android 15)
Root: Magisk + Zygisk + LSPosed

Goal:

Force a USB UVC external camera to behave as the ONLY usable system camera.

Requirements:

Any app requesting a camera must open ONLY the external USB UVC camera.

Internal physical cameras must be unusable or invisible.

No ROM building.

No vendor modifications.

No HAL or external provider changes.

Runtime-only solution.

Implementation must be done via:

LSPosed module (Java hooks)

Native Zygisk module (C/C++)

Delivered as a Magisk module ZIP

REQUIRED FINAL DELIVERABLES

To be eligible for selection, submission MUST include:

Working LSPosed module (APK)

Working Magisk module ZIP including native Zygisk (.so arm64)

Source code for both modules

Clear installation instructions

Demo video showing:

Camera apps only open UVC

Internal cameras are not accessible

Submissions without actual working modules will NOT be considered.

Conceptual diagrams, generic architecture images, or text explanations alone are not valid entries.

Acceptance Criteria

Only camera 0 and 1 mapped to UVC are usable.

No app can open internal cameras.

System remains stable.

No Play Integrity degradation compared to baseline.

Only submit if you are capable of delivering real Android native development.

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Profile image moraamor2864, Argentina.

Top entries from this contest

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Public Clarification Board

  • ruslanh59
    ruslanh59
    • 1 month ago

    please check #83 #84

    • 1 month ago
  • ruslanh59
    ruslanh59
    • 1 month ago

    please check #83 #84

    • 1 month ago
  • ruslanh59
    ruslanh59
    • 1 month ago

    please check #83 #84

    • 1 month ago
  • ruslanh59
    ruslanh59
    • 1 month ago

    please check #83

    • 1 month ago
  • ruslanh59
    ruslanh59
    • 1 month ago

    please check #83

    • 1 month ago
  • ruslanh59
    ruslanh59
    • 1 month ago

    please check #83

    • 1 month ago
  • ruslanh59
    ruslanh59
    • 1 month ago

    please check #83

    • 1 month ago
  • Faisal050
    Faisal050
    • 1 month ago

    Hi

    Did you get the working Zygisk and LSPosed modules you were looking for from this contest?

    If no one submitted a valid native C/C++ and Java hook solution to force the USB UVC camera on your Pixel 8a, we can start building the Magisk module for you immediately.

    Let me know if you are ready to get this done.

    Faisal Khalid

    • 1 month ago
  • shadanarif
    shadanarif
    • 1 month ago

    Hey Contest Holder, I am ready to give it a shot. Is the contest still available for newcomers? or did you already got your desired apk.

    • 1 month ago
  • zulqarnain4769
    zulqarnain4769
    • 2 months ago

    Entry #81 — Hybrid LSPosed + Magisk / Zygisk runtime solution:

    • Hook Android Camera2 API to expose only USB UVC camera
    • Hide internal camera IDs at native level
    • Deliver as Magisk ZIP + LSPosed APK + source code

    Includes install guide and demo showing only external camera works.
    Preview: https://019cff15-9296-7e27-911e-06ab266a8ff8.arena.site/

    • 2 months ago
  • nafiskabbo30
    nafiskabbo30
    • 2 months ago

    Check #79 . I have given apk

    • 2 months ago
  • nafiskabbo30
    nafiskabbo30
    • 2 months ago

    Hi, i am working on it to provide real apk for testing in few hours.

    • 2 months ago
    1. nafiskabbo30
      nafiskabbo30
      • 2 months ago

      It would be great if you can message me so I can send the apk link in few hours directly. Otherwise, need to paste apk in comments,

      • 2 months ago
  • zulqarnain4769
    zulqarnain4769
    • 2 months ago

    Hello,

    Thank you for the clarification. I understand this is a technical Android development task, not a design contest.

    I can implement a runtime-only solution for Pixel 8a (EvolutionX 15) using Magisk + Zygisk + LSPosed to make the USB UVC camera the only usable system camera.

    Approach:
    • Zygisk native module (C/C++) to intercept camera enumeration and map IDs 0 and 1 to the UVC camera
    • LSPosed module (Java hooks) to filter CameraManager results and block internal cameras
    • No ROM, vendor, or HAL modifications

    Deliverables:
    • Working LSPosed APK
    • Magisk module ZIP with arm64 Zygisk .so
    • Source code
    • Installation guide
    • Demo video showing apps only open the UVC camera

    My submission is Entry #47. Please review it and consider awarding the project so we can proceed further.

    Best regards,
    Asad Ali

    • 2 months ago
  • abdullah29as
    abdullah29as
    • 2 months ago

    kindly check entry #58

    • 2 months ago
  • hassanxmalik
    hassanxmalik
    • 2 months ago

    Hi! I read through your project requirements carefully. I want to be transparent about my setup before moving forward.

    I don’t currently have a rooted Pixel 8a device available for live testing. However, I do have experience working with Android system-level development, and I can implement the LSPosed hooks and the Zygisk native module according to your specifications.

    What I can do is:
    • Develop the LSPosed module (APK) with the required CameraManager hooks
    • Develop the native Zygisk module (.so) and package it as a Magisk module ZIP
    • Provide full source code and clear installation instructions

    Since I don’t have the exact device, I would send you the builds and you could test them on your Pixel 8a. Based on your test results and logs, I can iterate quickly and refine the implementation until the behavior matches your acceptance criteria.

    If this workflow works for you, I’d be happy to proceed and start building the modules.

    Let me know your thoughts.

    • 2 months ago
  • moraamor2864
    Contest Holder
    • 2 months ago

    All current submissions are conceptual diagrams.

    This is a real Android native development task involving LSPosed and Zygisk modules.

    Only entries including technical proof (code snippets, repository links, compiled sample modules, or clear technical explanation of interception approach) will be considered.

    Concept-only submissions will not be awarded.

    If you cannot provide actual Android module development, please withdraw your entry.

    • 2 months ago
    View 2 more messages Processing...
    1. scieng
      scieng
      • 2 months ago

      I have zip and apk (inside the zip folder of system folder) ready please check #42 :)

      • 2 months ago
    2. zulqarnain4769
      zulqarnain4769
      • 2 months ago

      We understand that the goal is to make all apps use only the external USB UVC camera, fully blocking internal cameras, without modifying the ROM, vendor, or HAL. Our solution uses a runtime-only approach via:

      LSPosed module (Java hooks) – intercepts CameraManager APIs to expose only the UVC camera.

      Native Zygisk module (C/C++) – filters internal camera enumeration at the system level.

      Magisk module ZIP – fully packaged for easy installation.

      Deliverables include: working LSPosed APK, Magisk ZIP with native library, complete source code, installation instructions, and a demo video proving internal cameras are inaccessible while the system remains stable.

      This submission meets all technical requirements, ensures system integrity, and guarantees full compliance, making it ready for awarding and immediate deployment. #47

      • 2 months ago
  • redspector
    redspector
    • 2 months ago

    Check #11 with multiple solutions - Message me if any Question

    • 2 months ago

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