即使将可见性设置为无，FloatingActionButton也会在一段时间内可见 [英] FloatingActionButton visible for sometime even if visibility is set to gone
本文介绍了即使将可见性设置为无，FloatingActionButton也会在一段时间内可见的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的LinearLayout中有一个FAB(FloatingActionButton).我希望将LinearLayout隐藏起来，即首先将可见性设置为消失，然后在单击菜单按钮时它应该变得可见.一切工作正常，但FAB在隐藏之前会保持可见一段时间.我尝试了所有方法，包括更改FAB的可见性以及使用hide()和show()，但是没有任何效果.
I am having a FAB (FloatingActionButton) in my LinearLayout. I want the LinearLayout to be hidden i.e. visibility set to gone at first and on clicking menu button it should get visible. Everything is working fine but FAB remains visible for sometime before hiding itself. I tried everything from changing visibility of FAB and using hide() and show() but nothing works.
我有以下链接，但由于某些原因，它们对我不起作用.
I got the following links but for some reason they don't work for me.
- FloatingActionButton always visible
- Gone FAB becames visible for a while
- FloatingActionButton doesn't hide
我的activity_main.xml:
My activity_main.xml:
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.wolfarts.checklist2.MainActivity">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:elevation="0dp"
android:paddingTop="24dp"
android:theme="@style/MyToolbarStyle">
<Spinner
android:id="@+id/spinner_nav"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="@style/Base.TextAppearance.AppCompat.Title"
android:visibility="gone"/>
</android.support.v7.widget.Toolbar>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/emptyStateView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<ImageView
android:src="@drawable/emptystatebag"
android:layout_marginTop="-30dp"
android:layout_gravity = "center"
android:layout_height="170dp"
android:layout_width="300dp"/>
<TextView
android:paddingTop="8dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:gravity = "center"
android:text="Nothing here. Try Adding Something."
android:textColor="#B8B8B8"
android:textSize="18sp"/>
</LinearLayout>
<android.support.design.widget.CoordinatorLayout
android:id="@+id/maincontainer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:animateLayoutChanges="true">
<LinearLayout
android:id="@+id/toolbarContent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="72dp"
android:paddingStart="72dp"
android:paddingRight="18dp"
android:paddingEnd="18dp"
android:paddingBottom="80dp"
android:visibility="gone"
android:elevation="4dp"
android:descendantFocusability="beforeDescendants"
android:focusableInTouchMode="true">
<android.support.design.widget.TextInputLayout
android:id="@+id/username_text_input_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColorHint="#B3FFFFFF"
android:layout_gravity="center_vertical">
<EditText
android:id="@+id/taskName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="35sp"
android:maxLines="1"
android:hint="Item Name"/>
</android.support.design.widget.TextInputLayout>
</LinearLayout>
<com.wolfarts.checklist2.CustomRecyclerView
android:id="@+id/taskListRecyclerView"
android:layout_height="match_parent"
android:layout_width="match_parent"/>
</LinearLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:paddingLeft="16dp"
android:clickable="true"
android:src="@drawable/ic_done_white_24dp"
app:layout_anchor="@id/toolbarContent"
app:layout_anchorGravity="bottom|right|end"
app:backgroundTint="@color/orange"
android:visibility="gone"
app:elevation="8dp"/>
</android.support.design.widget.CoordinatorLayout>
</FrameLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/navDrawer"
android:layout_width="280dp"
android:layout_height="match_parent"
android:layout_gravity="left|start">
<ListView
android:id="@+id/navList"
android:paddingTop="24dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@android:color/transparent"
android:dividerHeight="0dp"
android:background="#ffeeeeee"/>
</LinearLayout>
这是FAB中的错误吗?
Is this a bug in FAB?
推荐答案
CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
p.setAnchorId(View.NO_ID);
p.width = 0;
p.height = 0;
fab.setLayoutParams(p);
fab.setVisibility(View.GONE);
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