How to Quickly launch the Camera in Samsung Galaxy J2(SM-J200G)?
By using the Quick launch camera feature, you can set your phone to automatically launch the Camera app each time you drag the camera icon on lock screen.
Drag the Camera icon on Lock screen
Pictorial representation of the Quick launch camera settings are as follows:
a). Tap and hold the Camera icon from the Lock screen and drag it.
b). Camera will be activated.
CLICK HERE to know how to switch to Front camera mode in Samsung Galaxy J2 ( SM-J200G).