Android: How can I check if a device has Camera2 api features implemented or not?

Question

Well, how can I check if an android device has Camera2 api features implemented or not? There are many new features in camera2 api such as manual controls. So how can I know

Answer 1

In cases if someone needs full snippet of how to determine which camera in the device has Camera2 API support (at least limited support):

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    public boolean allowCamera2Support(int cameraId) {
        CameraManager manager = (CameraManager)getSystemService(Context.CAMERA_SERVICE);
        try {
            String cameraIdS = manager.getCameraIdList()[cameraId];
            CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraIdS);
            int support = characteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);

                if( support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY )
                    Log.d(TAG, "Camera " + cameraId + " has LEGACY Camera2 support");
                else if( support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED )
                    Log.d(TAG, "Camera " + cameraId + " has LIMITED Camera2 support");
                else if( support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_FULL )
                    Log.d(TAG, "Camera " + cameraId + " has FULL Camera2 support");
                else
                    Log.d(TAG, "Camera " + cameraId + " has unknown Camera2 support?!");

            return support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED || support == CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_FULL;
        }
        catch (CameraAccessException e) {
            e.printStackTrace();
        }
        return false;
    }

    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
    private void checkCamera2Support() {
        if( Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ) {
            int numberOfCameras = 0;
            CameraManager manager = (CameraManager)getSystemService(Context.CAMERA_SERVICE);

            try {
                numberOfCameras =  manager.getCameraIdList().length;
            } catch (CameraAccessException e) {
                e.printStackTrace();
            } catch(AssertionError e) {
                e.printStackTrace();
            }

            if( numberOfCameras == 0 ) {
                    Log.d(TAG, "0 cameras");
            }else {
                for (int i = 0; i < numberOfCameras; i++) {
                    if (!allowCamera2Support(i)) {
                        Log.d(TAG, "camera " + i + " doesn't have limited or full support for Camera2 API");
                    }else{
                        // here you can get ids of cameras that have limited or full support for Camera2 API
                    }
                }
            }
        }
    }