Android: set KeyEvent::text if possible

src/changelog/unreleased.md

@@ -105,6 +105,7 @@ changelog entry.
 - On Web, `Window::canvas()` now returns a reference.
 - On Web, `CursorGrabMode::Locked` now lets `DeviceEvent::MouseMotion` return raw data, not OS
   accelerated, if the browser supports it.
+- On Android, when `keycode` can be represented as character, its textual representation is provided in `KeyEvent::text`.
 - `(Active)EventLoop::create_custom_cursor()` now returns a `Result<CustomCursor, ExternalError>`.
 - Changed how `ModifiersState` is serialized by Serde.
 - `VideoModeHandle::refresh_rate_millihertz()` and `bit_depth()` now return a `Option<NonZero*>`.

src/platform_impl/android/mod.rs

@@ -20,6 +20,7 @@ use crate::event_loop::{
     ActiveEventLoop as RootActiveEventLoop, ControlFlow, DeviceEvents,
     EventLoopProxy as RootEventLoopProxy, OwnedDisplayHandle as RootOwnedDisplayHandle,
 };
+use crate::keyboard::Key;
 use crate::monitor::MonitorHandle as RootMonitorHandle;
 use crate::platform::pump_events::PumpStatus;
 use crate::window::{
@@ -468,15 +469,22 @@ impl EventLoop {
                             &mut self.combining_accent,
                         );
 
+                        let logical_key = keycodes::to_logical(key_char, keycode);
+                        let text = if let Key::Character(ref c) = logical_key {
+                            Some(c.to_owned())
+                        } else {
+                            None
+                        };
+
                         let event = event::WindowEvent::KeyboardInput {
                             device_id: Some(DeviceId::from_raw(key.device_id() as i64)),
                             event: event::KeyEvent {
                                 state,
                                 physical_key: keycodes::to_physical_key(keycode),
-                                logical_key: keycodes::to_logical(key_char, keycode),
+                                logical_key,
                                 location: keycodes::to_location(keycode),
                                 repeat: key.repeat_count() > 0,
-                                text: None,
+                                text,
                                 platform_specific: KeyEventExtra {},
                             },
                             is_synthetic: false,