如何添加新的“浮动操作按钮"?在两个小部件/布局之间 [英] How can I add the new "Floating Action Button" between two widgets/layouts

问题描述

我想您已经看到了新的 Android 设计指南，以及新的浮动操作按钮"又名FAB"

I guess you have seen the new Android design guidelines, with the new "Floating Action Button" a.k.a "FAB"

例如这个粉色按钮:

我的问题听起来很愚蠢，我已经尝试了很多东西，但是将这个按钮放在两个布局的交叉处的最佳方法是什么?

My question sounds stupid, and I have already tried a lot of things, but what is the best way to put this button at the intersection of two layouts?

在上面的例子中，这个按钮完美地位于我们可以想象的 ImageView 和 relativeLayout 之间.

In the above exemple, this button is perfectly placed between what we can imagine to be an ImageView and a relativeLayout.

我已经尝试了很多调整，但我相信有一种正确的方法可以做到.

I have already tried a lot of tweaks, but I am convinced there is a proper way to do it.

推荐答案

最佳实践:

• 添加compile 'com.android.support:design:25.0.1'到gradle文件
• 使用 CoordinatorLayout 作为根视图.
• 将layout_anchor添加到FAB并将其设置为顶视图
• 将 layout_anchorGravity 添加到 FAB 并将其设置为:bottom|right|end

• Add compile 'com.android.support:design:25.0.1' to gradle file
• Use CoordinatorLayout as root view.
• Add layout_anchorto the FAB and set it to the top view
• Add layout_anchorGravity to the FAB and set it to: bottom|right|end

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:id="@+id/viewA"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="0.6"
            android:background="@android:color/holo_purple"
            android:orientation="horizontal"/>

        <LinearLayout
            android:id="@+id/viewB"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="0.4"
            android:background="@android:color/holo_orange_light"
            android:orientation="horizontal"/>

    </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:clickable="true"
        android:src="@drawable/ic_done"
        app:layout_anchor="@id/viewA"
        app:layout_anchorGravity="bottom|right|end"/>

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

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