1. alirezahassan

    Android Question take picture with Phone Camera application

    hi all, i wnat to take picture with camera application. i check in android 4.7 when camera is opened, application will be closed. and it gives me an error about my codes that is in the Activity Create. but i don't have any problems and errors on the other phone. what should i do...
  2. Angel Garcia

    iOS Question How to detect camera permission authorization state?

    Hi all, I'm using the camera library to let the user take a photo from its iPhone, as you know when the user grants the permission first time everything works fine, but if he denies it, it never request permission never again, and when the 'cam.takepicture' event is fired it just show black...
  3. M

    Android Question Not solved [B4XPages] Barcode/QrCode scanner not detecting

    Hi everyone, i developed an app that uses the barcode/qrcode reader. i wanted to use b4xpages for the first time from the beggining of the project by following this example: Now i finished everything. On my...
  4. B

    Android Question Difficulty converting bytes to images

    Hi Erel had previously installed a CCTV source: I edited these sources for further practice so that images from one client are sent in bytes to the server and from the server are sent to another client, and in another...
  5. J

    Android Question is there an Equivalent in new API for getVerticalViewAngle() and .gethorizontalViewAngle()?

    Hello: due to GetVerticalViewAngle () and gethorizontalViewAngle () are deprecated in the latest camera API. I need to know them. thus, I would like to be able to calculate this data (getHorizontalViewAngle () and getVerticalViewAngle (). Is there any way to do it? Regards and Thanks in advance
  6. J

    Spanish Leer caracteristicas de la camara de fotos

    Buenos dias: Necesitaria vuestra ayuda, porque estoy realizando una aplicacion con la camara, y debo conocer unos datos de sus caracteristicas. (y por ello necesito vuestra ayuda y vuestros conocimientos) Son datos para obtener el angulo de vision de la camara (view angle)...
  7. Cain Soft

    Bug? Camera2 example : Exception: Sub activity_permissionresult was not found

    Hi, I downloaded the camera2 example ( and when I try to run in release mode, I get the following error message: On first run, the window asking for permission appeared. But after that it just throws an error. I...
  8. ismael_hannecker

    Android Question Record a video with overlay

    Hi there everyone, I have to build a program that generates a video file with a chronometer on top of this. Right now I am drawing above the preview screen (I am using CamEx2 sample as base) but my output file, as you can image, have no overlay. I did read many topics in this forum about...
  9. E

    Android Question Barcode Detector Vision

    Hi, on android 4.2.2 i get from builder isOperation = False. This code was working fine before on this mobile phone. It is hard for me to pin point when it stoped working but could be when changing to newer targetSDK (after updating to new version of b4a and a lot of maven errors). Apperently...
  10. letsmoscow

    Android Question Webview with full permissions.

    Hello! How i can use webview as standart browser with all perrmissions? Need use html5 (camera, geoposition) and file uploading. It's a possible (SDK 28)? Any examples with all of this permissions (camera, geo, uploading in one :) ))? Excuese for my English.
  11. gezueb

    Android Question Camera picture size

    The code below takes a picture, saves and loads it back. However, the image after the code execution is not scaled as in the preview, it looks as if cropped and then resized to the view. Sub TakePicture Wait For(cam.FocusAndTakePicture(MyTaskIndex)) Complete (Data() As Byte)...
  12. Michael2150

    Android Question Camera permissions for webview

    Hi there I want to use a camera through a website through the webview, but there is no popup to allow camera use when loading the website. Any advice?
  13. DALB

    Android Question Camera fails takes just one shot

    hello, with the camera library I can take a picture, but if I live my Layout which is in a panel (but not leave the activity), when I want to take a new shot, the last toastMessage at the end of this code appears. Sub OpenCamera (front As Boolean) rp.CheckAndRequest(rp.PERMISSION_CAMERA)...
  14. M

    iOS Question Document Scanner

    Hi, I was wondering if there is a way to implement a document scanner in iOS with the camera. Something like Office Lens app Thanks!!
  15. rleiman

    Android Question [SOLVED] Intent based camera crashes when back button is tapped.

    Greetings, I'm using the intent based camera and discovered the app crashes if the user taps the back button on their phone when the camera app is displayed on the screen. Everything else works. In our app the user taps a camera button. the intend based camera takes a photo, then returns back...
  16. rleiman

    Android Question Intent Based Camera - Taking photo with confirm screen

    Greetings, I'm experimenting with the intent based camera by Erel and would like to alter this code in TakePicture so the confirmation screen with "Ok" and "Retry" is not displayed so execution goes directly to ion_Event. Truly, Emad Sub TakePicture Dim i As Intent...
  17. Songwut K.

    Android Question How can I get wifi ssid and mac address list of access point ?

    My hospital finger scan not enough for convenient, I'd like to make solution for sign in/out to work daily. To make some app that scan wifi ssid and get mac address at check in area and take selfie photo to sign in/out. I want some library for my android app. 1) Scan wifi and get ssid with...
  18. M

    Wish Astream.WriteNoBoundsCheck - Avoid checking array bounds

    In working out using the ESP32 Camera (see tutorial here), I initially struggled with sending a buffer of data over 32KB using Astream.Write/Write2. For example, a picture taken by the camera at highest res (1600X1200 pixels) could easily be over 300KB. The camera returns a pointer to the...
  19. N

    Android Question CameraEx doesn't work.

    I want to take a picture when the PanelCamera is visible. But I can not initialize the camera. When I pressed on the BtnCamera, it just showed a black screen and return start camera false. But when I tried on a new project, it's work. I don't why, please help.. :(
  20. M

    B4R Tutorial ESP32 Camera Picture Capture and Video Streaming! (Updated with code!)

    Hello! Last December I made a request for support for the ESP32 Camera support. Well, I finally found the time to work on it myself and here's my initial attempt at implementing this with B4R. I'm using an ESP32CAM camera board with 4GB of PSRAM (like extended memory for the camera). I'm...