I have an activity Main that calls the other activities.
Now I think that the app sould start the activity Camera.
When I put "startactivity (Camera)" at the end of main.activity_create, the app disappears. It is still there, you can find it, but it is out of aview, I see the starting screen.
How can I change the activity with which the app starts?
Not sure that I understand. You can start a different activity from Activity_Create. If you want to remove the current activity then call Activity.Finish afterwards.
Thank you, I solved it now. I still would like to know if I can change the starting activity without shifting code and thus making the program less readable.