Interaction Methods

The LX1 features interaction methods which differ significantly from traditional touchscreen Android devices, and it is particularly important to keep these considerations in mind when designing the User Interface of an application intended to run on this device.

Existing applications which heavily leverage touchscreen interactions do not translate well to this device. This is due to touchscreen UI’s leveraging taps for input based on specific screen coordinates, which is not possible with the available interaction methods.

Voice

Voice commands are an ideal method of interacting with the device under many circumstances, as they will allow users to quickly control the device and provide input without requiring them to physically interact with the device, thus interrupting their workflow.

The device includes a Speech Recognition engine. Refer to the Speech SDK section for additional details on the engine and the speech vocabulary it supports.

Applications can optionally leverage alternate recognition engines by including them within the application itself.

Navigation Buttons

The three navigation buttons on the device include both short and long-press functionality.

The buttons generate KeyEvents which can be intercepted and handled explicitly in your application, or can be left to the system to handle. Reference Android KeyEvent documentation for details.

Short presses on the buttons will perform the following functions:

• Foremost Button – Move focus to the right within a UI or move down if no focusable objects are available to the right. Returns the KEYCODE_DPAD_RIGHT KeyEvent.

• Middle Button – Move focus to the left within a UI or move up if no focusable objects are available to the left. Returns the KEYCODE_DPAD_LEFT KeyEvent.

• Rearmost Button – Will select the current UI element which has focus. Returns the KEYCODE_DPAD_CENTER KeyEvent.

Long presses on the buttons will perform the following functions:

• Foremost Button – Brings up a context menu for the current area of the UI, allowing users to access additional functions without crowding the UI. (KEYCODE_MENU)

• Middle Button – Returns to the Home screen. Returns KEYCODE_HOME.

• Rearmost Button – Moves back one step in the UI. Returns KEYCODE_BACK.