Android9.0禁止滑动锁下拉状态栏

修改路径
/frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java
修改代码

    /* Only ever called as a consequence of a lockscreen expansion gesture. */
    @Override
    public boolean onDraggedDown(View startingChild, int dragLengthY) {
        // 加入这句，滑动锁下禁止下拉快捷设置
        if (mState == StatusBarState.KEYGUARD){
            return false;
        }
        //
        if (mState == StatusBarState.KEYGUARD
                && hasActiveNotifications() && (!isDozing() || isPulsing())) {
            mLockscreenGestureLogger.write(
                    MetricsEvent.ACTION_LS_SHADE,
                    (int) (dragLengthY / mDisplayMetrics.density),
                    0 /* velocityDp - N/A */);

            // We have notifications, go to locked shade.
            goToLockedShade(startingChild);
            if (startingChild instanceof ExpandableNotificationRow) {
                ExpandableNotificationRow row = (ExpandableNotificationRow) startingChild;
                row.onExpandedByGesture(true /* drag down is always an open */);
            }
            return true;
        } else {
            // abort gesture.
            return false;
        }
    }