USB Camera to Android

Hi there! I got a problem connecting my USB Camera to my tablet(ASUS K10A)
The device reads only the front and back camera
I’m searching for answers but still no luck, I need help. Thanks in advance!

I put this line in my AndroidManifest to use an external camera device if one is connected.

  <uses-permission android:name="android.permission.CAMERA" />
  <uses-feature android:name="android.hardware.camera.external" android:required="true"/>

My working code:

  #pragma strict
    private var devices : WebCamDevice[];
    public var deviceName : String;
    private var wct : WebCamTexture;
    private var resultString : String;
     
     
    function Start() {
        yield Application.RequestUserAuthorization (UserAuthorization.WebCam);
     
        if (Application.HasUserAuthorization(UserAuthorization.WebCam)) {
           devices = WebCamTexture.devices;
           deviceName = devices[0].name;
           wct = new WebCamTexture(deviceName, 640, 480, 30);
           renderer.material.mainTexture = wct;
           wct.Play();
           resultString = "no problems";
        } else {
           resultString = "no permission!";
        }
    }
     
    function OnGUI() {
        for (var i = 0; i < devices.length; i++) {
           GUI.Box(Rect(100, 100+(i*25), 300, 25),devices*.name);*

}
GUI.Box(Rect(100, 100+(i*25), 400, 25),resultString);
}

It seems that from Camera module 2.4 androids support external camera. See 相机版本支持  |  Android 开源项目  |  Android Open Source Project

External camera (e.g. USB hot-plug camera) support. The API updates specify the camera static info is available only when camera is connected and ready to use for external hot-plug cameras. Calls to get static info will be invalid calls when camera status is not CAMERA_DEVICE_STATUS_PRESENT. The framework counts solely on device status change callbacks to manage the available external camera list.

I just have no idea what devices comes with such a camera module version…

Philippe
,Seems that Android introduced with Camera module version 2.4 support for external camera. See 相机版本支持  |  Android 开源项目  |  Android Open Source Project that writes:

External camera (e.g. USB hot-plug camera) support. The API updates specify the camera static info is available only when camera is connected and ready to use for external hot-plug cameras. Calls to get static info will be invalid calls when camera status is not CAMERA_DEVICE_STATUS_PRESENT. The framework counts solely on device status change callbacks to manage the available external camera list.