Basic android app with video feeds, actuator and push button

Android app (running on a N701 rugged tablet) controlling an actuator while collecting some data from cameras, push button, micro switch and rangefinder.
Please find a prototype : (you can easily cut loading and password page by clicking on it)
[Url visible pour les membres Pro]
The devices are an actuator (connected to RS-485), 1 NO push-buttons (connected to GPIO), two cameras (connected to 1st and 2sd USB port), a rangefinder (conected to GPIO UART/I2C) and an NO Micro Switch (connected to GPIO).
Cameras (GS-15WM) :
- The full-size background of the UI is a live video feed on camera 1 (day light) or 2 (night - infrared light)
- You can switch from camera 1 to camera 2 with the button located on the upper left corner.
« Ax » number :
- One important variable on my project is « aX », « aX » is a whole digit, it is adjusted by the user using « + » or « - » or directly set to « 17 » or « 30 » in the middle right of the UI
Actuator (XM430-W210-R) - Push-button (NO, normal open), 0=open, 1=close :
- When push button = 1 during >0.1s and UI set on semi, it rotate 1 time the actuator (+60º, then -60º)
- When push button = 1 during >0.1s and UI set on burst, it rotate 3 times the actuator (+60º, then -60º, then +60º, then -60º, +60º, then -60º) .
- When push button = 1 and UI set on full, it rotate the actuator (+60º, then -60º, then +60º, then -60º…) , it stop when push button = 0
- If aX=0 and push button is pressed no rotation of the actuator. For any mode (semi, burst, full).
- If induction micro switch is activated and push button is pressed no rotation of the actuator. For any mode (semi, burst, full).
- For each time the actuator rotate, the aX number is decremented from 1.
- For each time the actuator rotate, the circle on the middle of the screen goes green during 0,25s.
- Semi, burst or full modes are selected by positioning as bigger (like in abode XD prototype)
Rangefinder (BP-DS-24 A02) :
- UI gets a data from the rangefinder
- UI convert rangefinder data to show a distance (0.3-12m) on the upper right corner of the interface.
- UI adjust the size of a circle in the middle of the UI
Micro Switch (NO, normal open), 0=open, 1=close :
- UI show message « Empty » on the lowest middle part of the screen if aX=0 and the micro switch =1 during more than 1s
message « Empty » diseapear when aX >0 and the micro switch = 0
- UI show message « Jam » on the lowest middle part of the screen if aX is >0 and the micro Switch = 1 during more than 1s
message « Jam » diseapear when aX >0 and the micro switch = 0
UI Specificity :
- UI needs to be full screen.
- UI needs to be operated with the touch screen.
- UI get a light and dark mode (like smartphone) changing as changing camera, camera 1 = day mode, camera 2 = dark mode.
- UI buttons are 50% transparent to allow a better comprehension of the video stream.
- UI can be lock and unlock with a password (9876).
- UI get recording button that active recording of the active video feed on a file.