Android defines a user space C abstraction interface for sensor hardware. The interface header is defined in hardware/libhardware/include/hardware/sensors.h. In order to integrate sensors with Android you need to build a shared library that implements this interface.
The types of sensors currently supported by Android include:
To implement a Sensors driver, create a shared library that implements the interface defined in sensors.h. You must name your shared library libsensors.so so that it will get loaded from /system/lib at runtime.
The following stub file, Android.mk, ensures that libsensors compiles and links to the appropriate libraries:
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := sensors LOCAL_PRELINK_MODULE := false LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw LOCAL_SHARED_LIBRARIES := liblog # include any shared library dependencies LOCAL_SRC_FILES := sensors.c include $(BUILD_SHARED_LIBRARY)
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