Image Picker - Error Piking Image "PlatformException(already_active, Image picker is already active, null)"

This problem occur from native Android side.
I encountered this problem. we had overridden onActivityResult in MainActivity without invoking super.onActivityResult,.This is the correct solution.

super.onActivityResult(requestCode, resultCode, data);

来源：https://github.com/flutter/flutter/issues/19103#issuecomment-583369926