android - 如何使用工具栏将 float 操作按钮集成到线性布局中

Question

我有以下 ListView ，我想在其中添加一个 float 操作按钮。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="@drawable/background_serious" >
    <include layout="@layout/toolbar"/>

    <ListView android:id="@id/android:list"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:cacheColorHint="#00000000">
    </ListView>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/ic_done" />

</LinearLayout>

在当前表单中，按钮根本不显示。我尝试将 LinearLayout 更改为 CoordinatorLayout，因为许多示例都具有它。但后来我得到一个错误:

java.lang.RuntimeException: Unable to start activity ComponentInfo{de.sudoq/de.sudoq.controller.menus.SudokuLoadingActivity}: android.view.InflateException: Binary XML file line #6: Error inflating class CoordinatorLayout
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
            ...
     Caused by: android.view.InflateException: Binary XML file line #6: Error inflating class CoordinatorLayout
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:757)
            ...
     Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.CoordinatorLayout" on path: DexPathList[[zip file "/data/app/de.sudoq-2/base.apk"],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]]
            ...

我也尝试过 FrameLayout 但随后列表越过了工具栏(您可以在列表项的透明部分下方看到工具栏，但它们覆盖了工具栏，而不是相反)

Answer 1

尝试将 ListView 和 FloatingActionButton 放在 FrameLayout 中

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:orientation="vertical"
   android:background="@drawable/background_serious" >

      <include layout="@layout/toolbar"/>
  <FrameLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">

          <ListView android:id="@id/android:list"
              android:layout_width="fill_parent"
              android:layout_height="wrap_content"
              android:cacheColorHint="#00000000">
          </ListView>

     <android.support.design.widget.FloatingActionButton
         android:id="@+id/fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="end|bottom"
         android:layout_margin="@dimen/fab_margin"
         android:src="@drawable/ic_done" />

  </FrameLayout>
</LinearLayout>