FloatingActionButton setVisibility()不起作用 [英] FloatingActionButton setVisibility() not working

问题描述

我无法隐藏我的FloatingActionButton.这是我的代码:

I can't hide my FloatingActionButton. Here is my code:

XML:

<CoordinatorLayout>

    <AppBarLayout android:id="@+id/appbar">

        <CollapsingToolbarLayout>

            <ImageView/>

            <android.support.v7.widget.Toolbar />

        </CollapsingToolbarLayout>

    </AppBarLayout>

    <NestedScrollView />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        app:layout_anchor="@id/appbar"
        app:layout_anchorGravity="bottom|right|end"/>

</CoordinatorLayout>

我打电话:

fab.clearAnimation();
fab.setVisibility(View.GONE);

我正试图隐藏FAB，但如果FAB位于CoordinatorLayout中，则setVisibility + clearAnimation似乎不起作用.

I'm trying to hide the FAB, but it seems that setVisibility + clearAnimation does not work if the FAB is in a CoordinatorLayout.

即使我调用fab.clearAnimation，动画仍会触发.谁能帮我吗?

Even if I call fab.clearAnimation, the animation is still triggered. Can anyone help me?

推荐答案

如果您的问题是动画，则可以尝试使FAB Behavior无效.至于可见性，您应该将在布局中设置的锚定为空:

If your issue is the animation, you could try invalidating the FAB Behavior. As for the visibility, you should null the anchor you have set in your layout:

CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
p.setBehavior(null); //should disable default animations
p.setAnchorId(View.NO_ID); //should let you set visibility
fab.setLayoutParams(p);
fab.setVisibility(View.GONE); // View.INVISIBLE might also be worth trying


//to bring things back to normal state
CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
p.setBehavior(new FloatingActionButton.Behavior());
p.setAnchorId(R.id.appbar);
fab.setLayoutParams(p);

这篇关于FloatingActionButton setVisibility()不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！