Android之 BatteryService

核心提示：//在BatteryService.java中mUEventObserver.startObserving("SUBSYSTEM=power_supply");private UEventObserver mUEventObserver = new UEventObserver() {@Overri

//在BatteryService.java中

mUEventObserver.startObserving("SUBSYSTEM=power_supply");

private UEventObserver mUEventObserver = new UEventObserver() {

@Override

public void onUEvent(UEventObserver.UEvent event) {

update();

}

};

在UEvent thread中会不停调用 update()方法，来更新电池的信息数据。

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5. 附录相关文件：

(1). SystemServer.java (frameworksframeworksaseservicesjavacomandroidserver)

(2). BatteryService.java (frameworksframeworksaseservicesjavacomandroidserver)

(3). UEventObserver.java (frameworksframeworksasecorejavaandroidos)

(4). com_android_server_BatteryService.cpp (frameworksframeworksaseservicesjni)