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Android mainboards · Touch displays · Firmware — since 2013
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Display

Static methodsBroadcast — returns void

Control the screen: brightness, orientation, backlight, HDMI output, and capturing the screen.

Brightness​

public static void setScreenBrightness(Context context, String value)  // "0" - "255"
ItempApiPub.setScreenBrightness(context, "200");

"0" is the dimmest the panel allows (not necessarily off — use the backlight control to blank it).

Backlight on/off​

public static void setBacklightEnable(Context context, boolean enable)
ItempApiPub.setBacklightEnable(context, false);   // panel dark, board still running

Useful for blanking a display outside opening hours without sleeping the whole board.

Orientation​

Two ways to rotate. setScreenOrientation sets an absolute angle:

public static void setScreenOrientation(Context context, String orientation)
// "0" | "90" | "180" | "270"
ItempApiPub.setScreenOrientation(context, "90");   // portrait

screenRotation steps the rotation by one position each call:

public static void screenRotation(Context context)   // rotate by one step

For fixed-install signage, use setScreenOrientation with an absolute angle. Reserve screenRotation for interactive "rotate" buttons.

HDMI output​

public static void setHDMIoutEnable(Context context, boolean enable)
ItempApiPub.setHDMIoutEnable(context, true);

Screenshot​

public static void screenShot(Context context)

Captures the current screen to the device's default screenshot location. There is no return value and no path argument — retrieve the file through the normal Android storage APIs afterwards.

Notes​

Brightness is a string "0"-"255". An int will not compile; a value over 255 is ignored.

Absolute vs stepped rotation. Mixing setScreenOrientation and screenRotation in the same app makes the current angle hard to track. Pick one model per app.

Backlight off is not sleep. The board keeps running, the network stays up, schedules still fire. It only blanks the panel.