修改虚拟按键
Y:\frameworks\base\services\core\java\com\android\server\policy\
PhoneWindowManager.java
if ("1".equals(navBarOverride)) {
mHasNavigationBar = false;
} else if ("0".equals(navBarOverride)) {
mHasNavigationBar = true;
}
mHasNavigationBar = false;
// For demo purposes, allow the rotation of the HDMI display to be controlled.
