我们如何将“浮动操作"按钮放置在任何布局的顶部 [英] How we can put Floating action button on top of any layout

问题描述

我正在对浮动操作按钮进行一些操作.我有一个列表视图，并在屏幕底部显示google广告，该浮动操作按钮显示在同一位置(底部|末尾).因此操作按钮隐藏了广告.

我想将浮动操作"按钮移到广告线性布局上方一点.

请查看图片:

我的代码如下:

<android.support.design.widget.FloatingActionButton
     android:id="@+id/fab"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_margin="@dimen/fab_margin"
     android:layout_alignParentBottom="true"
     android:layout_alignParentEnd="true"
     android:layout_alignParentRight="true"
     android:layout_gravity="bottom|end"
     android:src="@drawable/fav"
     android:adjustViewBounds="false" />


adLayoutId is ad layout id

请帮助.

谢谢.

解决方案

您应该使用RelativeLayout，并且我们知道，RelativeLayout中的较新子项倾向于漂浮在RelativeLayout中的较早子项之上.

因此，要使FAB浮动在任何布局上，请确保在所有视图之后(在XML布局的末尾)定义了FAB.

如果使用android:layout_margin="@dimen/fab_margin"，则操作FAB的最佳方法是设置视图之间的依赖关系，例如:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/adLayoutId"/>

    <LinearLayout
        android:id="@+id/adLayoutId"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:background="@android:color/black"/>

    <android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@id/adLayoutId"
        android:layout_alignParentRight="true"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/fav"/>
</RelativeLayout>

浮动操作按钮将始终位于广告线性布局上方，并且不受广告布局尺寸的影响. 希望对您有所帮助.

I am doing some operation on floating action button . I have a list view and showing google ad at bottom of my screen, The floating action button is showing at same place (bottom|end). so action button is hiding the ad.

I want shift the Floating action button little above the ad linear layout.

Please have a look the image:

My code is look like:

<android.support.design.widget.FloatingActionButton
     android:id="@+id/fab"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_margin="@dimen/fab_margin"
     android:layout_alignParentBottom="true"
     android:layout_alignParentEnd="true"
     android:layout_alignParentRight="true"
     android:layout_gravity="bottom|end"
     android:src="@drawable/fav"
     android:adjustViewBounds="false" />


adLayoutId is ad layout id

Please help.

Thanks in advance.

解决方案

You should use RelativeLayout, and as we know, later children in a RelativeLayout tend to float over earlier children in a RelativeLayout.

So, to have a FAB float over of any layout, make sure that the FAB is defined after all views (at the end of the XML layout).

If you use android:layout_margin="@dimen/fab_margin" the best way to manipulate FAB is set dependencies between views, for example:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@id/adLayoutId"/>

    <LinearLayout
        android:id="@+id/adLayoutId"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:background="@android:color/black"/>

    <android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@id/adLayoutId"
        android:layout_alignParentRight="true"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/fav"/>
</RelativeLayout>

Floating action button always will be above the ad linear layout, and independent from ad layout size. Hope it helps.

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