android 滑动锁屏状态下如何禁止下拉状态栏

滑动锁屏状态下状态栏可以下拉是google 4.0 默认的设计。如果要禁止此功能，请修改KeyguardViewMediator.java的adjustStatusBarLocked()方法，将
 if (isSecure() || !ENABLE_INSECURE_STATUS_BAR_EXPAND) {
// showing secure lockscreen; disable expanding.
flags |= StatusBarManager.DISABLE_EXPAND;
}
修改为：
if (isSecure() || ENABLE_INSECURE_STATUS_BAR_EXPAND) {
// showing secure lockscreen; disable expanding.
flags |= StatusBarManager.DISABLE_EXPAND;
}