This makes a small change to the C glue code for GameActivity to send
looper wake ups when new input is received (only sending a single wake
up, until the application next handles input).
When a wake up is received and we recognise that new input is available
then an `InputAvailable` event is sent to the application - consistent
with how NativeActivity can deliver `InputAvailable` events.
This addresses a significant feature disparity between GameActivity and
NativeActivity that meant GameActivity was not practically usable for
GUI applications that wouldn't want to render continuously like a game.
Addresses #4
android_main() now takes an `app: AndroidApp` argument and has an
extern "Rust" ABI instead of "C" ABI.
This should help make it possible to run multiple native Activities in a
single process.
This leaves the InputBuffer abstraction as an implementation detail
and just exposes an API like this for processing input:
app.input_events(|event| {
// handle event
});
The main consideration here was to have an API that could also be
supported via NativeActivity to keep open the possibility of a standard
Android 'glue' API.
Robert Bragg