android - W/CameraBase﹕ An error occurred while connecting to camera: 0 on camera.open() call

Question

I'm writing a camera app and whenever I call camera.open() the app crashes and then I get this error:

W/CameraBase﹕ An error occurred while connecting to camera: 0

Here is how I'm opening the camera:

public void getCameraInstance(){
    mCamera = null;

    try 
    {
        mCamera = Camera.open(); // attempt to get a Camera instance
    }

    catch (Exception e)
    {
        // Camera is not available (in use or does not exist)

    }
}

UPDATE:

If you are reading this please note that this is for the original camera API and no longer applies the the latest version of the camera api (camera2).

You should use the camera2 api from this point onwards as it has greater functionality and also has a better image processing pipeline.

NOTE ONLY VALID UP TO excluding API 21 (Lolipop) i.e. does not apply for Lolipop and above.

Answer 1

You manualy uploaded your application to phone. That is why camera permission is not approved. You have to open settings->applications (or something like that) and manualy approve this permission.