Is there any way to listen for when the camera has loaded in? cwac-camera

Question

I\'ve got my CWAC Camera fragment setup, and everything is working nicely. There\'s a few customizations I\'d like to do.

1. I\'d like to show a ProgressBar as th

Answer 1

To be notified when the camera is loaded and preview started, use this code:

public class MyCameraFragment extends CameraFragment {

    CameraView cameraView;

    Camera.PreviewCallback previewCallback = new Camera.PreviewCallback() {
        @Override
        public void onPreviewFrame(byte[] data, Camera camera) {
            // camera is "loaded" and first preview is sent to the screen
            // do whatever you want to do
        }
    };

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        cameraView = // code to find your CameraView
    }

    @Override
    public void onResume() {
        super.onResume();
        Camera camera = cameraView.getCamera();
        if (null != camera) {
            camera.setOneShotPreviewCallback(previewCallback);
        }
    }

    private void somehowRestartedCameraViewForWhateverReason() {
        if (null != cameraView) {
            cameraView.onResume(); // force it to restart
            Camera camera = cameraView.getCamera();
            if (null != camera) {
                camera.setOneShotPreviewCallback(previewCallback);
            }
        }
    }
}

I used this code to update the UI, so that flash button only appears when camera supported:

camera.getParameters().getSupportedFlashModes()

return non-null List and size > 0. Usually Front Facing Camera has no flash but who knows?

If you want to switch camera, please also see my other answer here: CWAC Camera - Multiple camera views in one layout (and switching between them)