| Skyler Kaufman | 991ae4d | 2011-04-07 12:30:41 -0700 | [diff] [blame^] | 1 | # Sensors # |
| 2 | |
| 3 | Android defines a user space C abstraction interface for sensor hardware. The interface header is defined in |
| 4 | `hardware/libhardware/include/hardware/sensors.h`. |
| 5 | In order to integrate sensors with Android you need to build a shared library that implements this interface. |
| 6 | |
| 7 | The types of sensors currently supported by Android include: |
| 8 | |
| 9 | - Accelerometer |
| 10 | - Magnetic Field |
| 11 | - Orientation |
| 12 | - Gyroscope |
| 13 | - Light |
| 14 | - Pressure |
| 15 | - Temperature |
| 16 | - Proximity |
| 17 | |
| 18 | ## Building a Sensor Library ## |
| 19 | |
| 20 | To implement a Sensors driver, create a shared library that implements the interface defined in `sensors.h`. You must name your shared library |
| 21 | `libsensors.so` so that it will get loaded from `/system/lib` at runtime. |
| 22 | |
| 23 | The following stub file, `Android.mk`, ensures that `libsensors` compiles and links to the appropriate libraries: |
| 24 | |
| 25 | LOCAL_PATH := $(call my-dir) |
| 26 | include $(CLEAR_VARS) |
| 27 | |
| 28 | LOCAL_MODULE := sensors |
| 29 | |
| 30 | LOCAL_PRELINK_MODULE := false |
| 31 | |
| 32 | LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw |
| 33 | |
| 34 | LOCAL_SHARED_LIBRARIES := liblog |
| 35 | # include any shared library dependencies |
| 36 | |
| 37 | LOCAL_SRC_FILES := sensors.c |
| 38 | |
| 39 | include $(BUILD_SHARED_LIBRARY) |
| 40 | |
| 41 | Doxygen content is unavailable at the moment as source.android.com is deconstructed and then reconstructed. Sorry for the inconvenience! |