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.
Changed signature of GetKeyChordName() to use ImGuiKeyChord.
Additionally SetActiveIdUsingAllKeyboardKeys() doesn't set ImGuiKey_ModXXX but we never need/use those and the system will be changed in upcoming commits.
Details: note that SDL, OSX and GLFW backends removed recording of MouseJustPressed[] which will be unnecessary with input queue (which is the NEXT commit). (#2787, #1992, #3383, #2525, #1320)
