一、Android的电源管理部分文件路径如下：

frameworks/base/core/java/android/os/PowerManager.java

     PowerManager类被APP调用，控制电源设备状态切换等

frameworks/base/services/java/com/android/server/PowerManagerService.java

    PowerManagerService属于PowerManager的核心

frameworks/base/core/java/android/os/Power.java

     Power与jni接口交互

frameworks/base/core/jni/android_os_power.cpp

     此文件是PowerManager的jni接口实现

hardware/libhardware/power/power.c

     PowerManager的HAL代码，与电源管理的kernel交互