Epson Moverio Pro BT-2000 Developer's Manual page 43

■Using the change function for key assignments
By changing the key assignments, the key codes called when you press the A, B, X, or Y buttons
are not the standard Back, Home, or Menu buttons in Android, instead, the key codes are
changed to F1 to F4.
Therefore, you can include optional functions to the F1 to F4 codes making use of the A, B, X,
and Y buttons as with the application's original function.
■ Specifications for status transitions in key assignment mode
Status transitions (where the value of the key is changed) for the key assignment mode cannot
be set in the app; they should be set in the system. Management of key assignment mode must
be done by last application before switched. For example, when the key assignment mode for
application A is set to User mode, and then a different application B is started, the key
assignment mode for application B is also set to User mode.
■Specifications for status transitions in key assignment mode when using iWnnIME
The BT-2000 is equipped with a standard iWnnIME text input system. This system uses the
Back, Menu, and D-pad keys for input, and automatically changes the key assignments to
Default mode when starting up the BT-2000. When closing an app, the key assignment mode
changes to the mode set in iWnnIME for the last app that was started, however operations are
not guaranteed when an error occurs or if the app does not close normally.
When an app is constructed with multiple source calls, and calls that apply not just iWnnIME, we
recommend managing the key assignment status according to each app that is started.
■Notes on switching key assignment during key operation
Switching key assignment during pressing and holding the key may cause the wrong key events
to be recognized as it pressed. Don't call the switching API when the key is pressed for a long
time.
■Notes on function assignment to the simultaneous key press
If you hold down "up"+"down"+"OK" or "left"+"right"+"OK" at the same time, the key lock will
operate. Please do not assign function to press this button simultaneously.
MOVERIO Pro Developer's Guide (Rev.1.4)
37