本章主要内容 * 介绍GPS基础知识； * 介绍Android中GPS模块以及LocationManagerService。 本章所涉及的源代码文件名及位置 * LocationActivity.java　 ~~~ development/samples/training/locationaware/src/com/example/android/location/LocationActivity.java ~~~ * LocationManagerService.java　　 ~~~ framework/base/services/java/com/android/server/LocationManagerService.java ~~~ * LocationProviderProxy.java　　 ~~~ framework/base/services/java/com/android/server/location/LocationProviderProxy.java ~~~ * GpsLocationProvider.java ~~~ framework/base/services/java/com/android/server/location/GpsLocationProvider.java ~~~ * com_android_server_location_GpsLocationProvider.cpp　　 ~~~ framework/base/services/jni/com_android_server_location_GpsLocationProvider.cpp ~~~ * gps.h　　 ~~~ hardware/libhardware/include/hardware/gps.h ~~~ * LocationSettings.java　　 ~~~ packages/apps/Settings/src/com/android/settings/LocationSettings.java ~~~