I use a Bluetooth keyboard with a variety of Android devices. Most versions of Android (below 4.2.2) when the external keyboard is connected the on-screen keyboard is still available.
When I pair the Bluetooth keyboard to a Nexus 7 running Android 4.2.2 the on screen keyboard is disabled. I cannot find a way to enable the on-screen keyboard from the tablet.
Some Bluetooth keyboards include an 'eject' button which toggles the on-screen keyboard. I'm concerned about the times that I'm far enough from the Bluetooth keyboard that I can't reach it but still within Bluetooth range and I can't type on the screen.
Is there a way on an Android 4.2.2 (or higher) device to enable the on-screen keyboard while a Bluetooth keyboard is connected?