Backend improvements (imgui_impl_android.h/.cpp):
- Moved JNI soft-keyboard and Unicode char polling from the example into the backend.
The backend automatically shows/hides the soft keyboard based on io.WantTextInput
during NewFrame().
- Moved JNI Unicode character polling from the example into the backend.
Characters are polled and fed to io.AddInputCharacter() automatically.
- Added clipboard support via JNI to Android ClipboardManager.
io.SetClipboardTextFn / io.GetClipboardTextFn are now set by the backend.
- Added ImGui_ImplAndroid_ShowSoftKeyboard() / HideSoftKeyboard() public API.
- Init() now accepts optional asset_manager and native_activity params.
When native_activity is provided, JNI features are enabled automatically.
When nullptr, the backend degrades gracefully (no keyboard/clipboard).
- Added sensor support via NDK ASensor API (no JNI needed):
Accelerometer, Gyroscope, Magnetometer, Light, Proximity, Pressure,
Humidity, Ambient Temperature.
API: EnableSensor(), DisableSensor(), GetSensorData(), IsSensorAvailable().
Sensor events are drained non-blocking in NewFrame().
- Added display metrics via JNI:
DPI, density, xdpi/ydpi, refresh rate, orientation, resolution.
API: GetDisplayMetrics().
Used to auto-scale ImGui style to the device's actual density.
Example cleanup (main.cpp):
- Removed ~120 lines of JNI boilerplate (ShowSoftKeyboardInput, PollUnicodeChars,
GetAssetData). The example is now a clean Init -> Loop -> Render -> Shutdown.
- Single ImGui_ImplAndroid_Init() call passes the activity object; the backend
handles the rest.
- Added sensor window: live accelerometer, gyroscope, magnetometer, light, proximity
readouts with visual progress bars.
- Added display window: resolution, DPI, density, refresh rate, orientation.
- Uses actual device density for style scaling instead of hardcoded 2.0f.
CMakeLists.txt: added 'sensor' to target_link_libraries for ASensor API.
Kotlin activity (MainActivity.kt):
- Kept the three JNI-bridge methods (showSoftInput/hideSoftInput/pollUnicodeChar)
since Android's native API does not provide these. Cleaned up and documented
that they are called by the backend, not by app code.
