Error in taking multiple picture in one second on Android

Question

I want to use the Android to take multiple images in one second. The basic idea is to use a Timer at a certain FPS that will trigger the camera to capture images.

The problem is that when I want to trigger the camera more than 1 times in one second, say every 500ms, there will be an error in startPreview. java.lang.RuntimeException: startPreview failed

How can i fixed this?. Thanks.

Answer 1

You should call startPreview() in your onPictureTaken() callback, and nothing guarantees that this callback will be activated at the frame rate you expected. Many cameras provide burst-shot mode, but there is no common API yet. Hopefully, soon this API will arrive .

Answer 2

I take the same error for trying to take many pictures even when the camera is not ready. So you should define a boolean isItSafeToTakePicture to control if the previous photo-take-action is finished.

Using a boolean like this should solve the issue, even though you may not be able to set 500 ms interval for taking photos, this boolean will define the minimum time limit.