FloatingActionButton隐藏在列表滚动上

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?

答

请参见此一个>.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>

FloatingActionButton隐藏在列表滚动上

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