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StateCallback { Override public void onOpened CameraDevice camera { VideoProcessingService. I use ImageReader surface to get frames. BuildBetterApps Follow the for more! With this knowledge, you can now ban all selfies.

Usually a camera device has multiple cameras, front and back. It seems to be connected to phone orientation somehow.



What I want to achieve is capturing a picture without showing the preview, sending directly the output to an ImageReader. I have used the as a starting point. However, the callback of my ImageReader is never called, hence no image is sent to its Surface. Do I really need to display a preview first? JPEG, 2 ; imageReader. OnImageAvailableListener Override public void onImageAvailable ImageReader reader createCaptureRequest ; ; private void createCaptureRequest { try { CaptureRequest. Since I struggled a lot finding out how this works, here is a minimal working Android Service which can process Image data. It probably needs some time after create before you can call start the service, though! StateCallback { Override public void onOpened CameraDevice camera { VideoProcessingService. StateCallback { Override public void onConfigured CameraCaptureSession session { VideoProcessingService. NullPointerException: Attempt to invoke virtual method 'void android.

But, not all cameras are created sol, and some may be lacking the features above. Each camera device has a range of properties and settings that describe the device. The rotation value we get from the sensor of the camera CameraCharacteristics. But, if your app needs a custom camera experience then the Camera2 API is the north choice. It can be obtained through the camera characteristics. It is working but with an issue I hope you know how to solve. For this tutorial, I am using the following tools and environment, feel free to use what works for you. One reason why Camera2 confuses developers is that there are so many callbacks that we have to manage just to take one picture. Get ready for a new dawn of camera apps using the Camera2 API. If you want to read more about android camera2 api, I will suggest you go to camera2 android github. Between are a couple of things happening in the method above. If that still doesn't help, check if you're using front camera or rear camera and try with the opposite one the sample source code you mentioned is pretty straightforward in how to accomplish that.