You should not use the BitmapFactory.decodebytearray() method, as the camera image is not a PNG or JPEG image.

The correct solution is posted here:

https://developer.vuforia.com/forum/android/camera-image-returns-black

Please follow up in that thread.

(I'll close this one).

When I convert that byte[] to a bitmap using BitmapFactory.decodebytearray it throws exception.

--- SkImageDecoder::Factory returned null.

 : java.lang.NullPointerException.

See updated code snippet in the FAQ:

https://developer.vuforia.com/forum/faq/android-how-can-i-access-camera-image

in particular, use these lines instead:

same error for me. I am using this code:

  GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
        
        State state = mRenderer.begin();

        Image imageRGB565 = null;
        Frame frame = state.getFrame();
              
        for (int i = 0; i < frame.getNumImages(); ++i) {
            Image image = frame.getImage(i);
            if (image.getFormat() == PIXEL_FORMAT.RGB565) {
                imageRGB565 = image;
                break;
            }
            Log.e(LOGTAG, "Entra 1");
        }
              
        if (imageRGB565 != null) {
        	  int imageWidth = imageRGB565.getWidth();
              int imageHeight = imageRGB565.getHeight();
              int stride = imageRGB565.getStride();
              Log.d("Image", "Image width: " + imageWidth);
              Log.d("Image", "Image height: " + imageHeight);
              Log.d("Image", "Image stride: " + stride);
               
               
              ByteBuffer pixels = imageRGB565.getPixels();
              byte[] pixelArray = pixels.array();
              Log.d("Image", "First pixel byte: " + pixelArray[0]);
            Log.e(LOGTAG, "Entra 2");
        }

and the error log: