isScreenOn) {

return mWindowManagerService.mInputMonitor.interceptKeyBeforeQueueing(

event, policyFlags, isScreenOn);

}

InputMonitor.java

public int interceptKeyBeforeQueueing(

KeyEvent event, int policyFlags, boolean isScreenOn) {

return mService.mPolicy.interceptKeyBeforeQueueing(event, policyFlags, isScreenOn);

}

这里mService是WindowManagerService，mPolicy 则是如下定义(WindowManagerService中)

final WindowManagerPolicy mPolicy = PolicyManager.makeNewWindowManager();

PolicyManager.java

public static WindowManagerPolicy makeNewWindowManager() {

//sPolicy就是Policy的实例化

return sPolicy.makeNewWindowManager();

}

Policy.java

public WindowManagerPolicy makeNewWindowManager() {

return new PhoneWindowManager();

}

至此，正式调用PhoneWindowManager的实例。

因此处理hardkey的相关代码是在PhoneWindowManager中了