Question

I used a ZXing library to develop a barcode scanning application.When I used my Atrix2 and HTC EVO 3D to test the application.It works but it did not work with Alcatel ot986.It just did not response with black screen.After that I opened the default camera application,it showed that the phone could not find the camera.After restarting the phone,the camera is OK.

Answer 1

Did you release the camera when you were done using it?

Important: Call release() to release the camera for use by other applications. Applications should release the camera immediately in onPause() (and re-open() it in onResume()).

http://developer.android.com/reference/android/hardware/Camera.html