android camera not asking whether to save or discard and makes the activity refresh

android camera not asking whether to save or discard and makes the
activity refresh

I have 3 buttons to capture the image from the camera invoking through
Intent. While trying to take second image the first image is getting null,
similarly after taking the third image the 2 and 1st images are becoming
null.
Here in some devices it is working fine. But in some devices it is not
working. Also the devices are not asking whether to save or discard the
images directly it is moving to the activity and the activity is loosing
its scope.
Any help appreciated! Thanks..