关闭不带动画的导航抽屉 [英] close Navigation Drawer with no animation

问题描述

我试图在完成某些活动后立即关闭导航抽屉，而没有滑动动画.我不会在活动开始时关闭它，因为如果用户退出活动，我希望它保持打开状态.但是，我无法在没有短暂闪烁的动画的情况下关闭它，因为它本身会关闭.我尝试了以下代码的变体:

I am trying to close my navigation drawer after I finish certain activities immediately, without the sliding animation. I don't close it on activity start because I would like it to stay open if the user backs out of the activity. However, I cannot get it to close without a brief flickering animation as it closes itself. I have tried variations of the following code:

protected void closeDrawerImmediate() {
    mDrawerLayout.setVisibility(View.GONE);
    mDrawerLayout.closeDrawers();
    mDrawerLayout.setX(0);
    mDrawerLayout.setVisibility(View.VISIBLE);
}

推荐答案

您可以在支持库的v24中使用新的DrawerLayout.closeDrawer(int/View, bool)方法立即关闭抽屉:

You can use the new DrawerLayout.closeDrawer(int/View, bool) methods in v24 of the support library to instantly close a drawer:

drawerLayout.closeDrawer(Gravity.LEFT, false);

如果您只是想立即关闭抽屉，例如从点击抽屉项启动活动时，这可能就足够了.

If you just want to close a drawer immediately, such as when you're launching an activity from tapping on a drawer item, that is probably enough.

如果您想在返回活动时关闭抽屉，则在适当的地方(例如开始新活动)设置一个像closeDrawerOnResume = true这样的有状态布尔值，然后在onResume中检查此布尔值并关闭抽屉，而不给它做动画.

If you want to close the drawer on coming back to the activity, I'd set a stateful boolean like closeDrawerOnResume = true wherever is appropriate (eg. starting a new activity), and then in onResume check this boolean and close the drawer without animating if it is true.

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