FloatingActionButton隐藏在列表滚动上 [英] FloatingActionButton hide on list scroll

问题描述

我使用android.support.design.widget包中的FloatingActionButton:

<android.support.design.widget.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentEnd="true"
    android:layout_marginBottom="20dp"
    android:layout_marginEnd="16dp"
    android:clickable="true"
    android:backgroundTint="@color/primaryColor"
    android:src="@drawable/ic_search_white_24dp"
    app:borderWidth="0dp"
    app:elevation="6dp"
    app:backgroundTint="@color/primaryColorDark"
    app:rippleColor="@color/accentColor" />

是否可以将该按钮配置为在列表视图向下滚动时与动画一起隐藏，并在列表视图向上滚动至顶部时再次显示?

Is it possible to configure that button to hide with an animation when the listview is scrolling down and to show it again when listview is scrolling up to the top?

推荐答案

请参见此.在这里，它告诉您如何做您想达到的目标.您必须在CoordinatorLayout和ListView中像这样使用它:

See this. Here it tells how to do what you are trying to achieve. You have to use it like this in a CoordinatorLayout and ListView :

<android.support.design.widget.CoordinatorLayout
    android:id="@+id/main_content"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

          <ListView
              android:id="@+id/lvToDoList"
              android:layout_width="match_parent"
              android:layout_height="match_parent"></ListView>

          <android.support.design.widget.FloatingActionButton
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_gravity="bottom|right"
              android:layout_margin="16dp"
              android:src="@drawable/ic_done"
              app:layout_anchor="@id/lvToDoList"
              app:layout_anchorGravity="bottom|right|end" />

</android.support.design.widget.CoordinatorLayout>

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