如何启用拆分操作栏？

How to enable Split Action Bar?

我想创建一个 android 应用程序，它有 3 个滑动选项卡面板，每个面板都有 5 个按钮（保存、新建、删除、退出..）。

我想要的是如下：

我为 5 个按钮创建了滑动标签 panel.And，我添加了拆分操作 bar.But 它像正常拆分操作一样工作 bar.My AndroidManifest.xml 是：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.belsoft.myapplication">

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:uiOptions="splitActionBarWhenNarrow"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

</manifest>

我哪里错了？

实施splitActionBar:

只需将 android:uiOptions="splitActionBarWhenNarrow" 添加到 AndroidManifest.xml 中的 activity 标签，就像这样... 

`<activity
    android:name=".MainActivity"
    android:uiOptions="splitActionBarWhenNarrow">`<br>

你可以阅读更多here and here

NOTE: It is available ONLY for handset devices with a screen width of 400dp.

要创建自定义底部工具栏：

如果您想为所有设备设置它，请在此处查看我的答案（找到以 Creating custom bottom toolbar 开头的 post）：

Creating custom bottom toolbar

I've already created a simple app which should demonstrate you how to begin

Creating a custom ViewGroup

Here's my activity_main.xml layout file:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="0dp"
    tools:context="com.example.piotr.myapplication.MainActivity">

    <LinearLayout
        android:id="@+id/show_pdf"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:background="@color/primary_material_light"
        android:orientation="horizontal">

        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/abc_ic_menu_cut_mtrl_alpha"/>

        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/abc_ic_menu_copy_mtrl_am_alpha"/>

        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/abc_ic_menu_selectall_mtrl_alpha"/>

        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/abc_ic_menu_paste_mtrl_am_alpha"/>

        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/abc_ic_menu_share_mtrl_alpha"/>

        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/abc_ic_menu_selectall_mtrl_alpha"/>

        <ImageButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:src="@drawable/abc_ic_menu_moreoverflow_mtrl_alpha"/>
    </LinearLayout>

    <EditText
        android:id="@+id/editText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="75dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="Name"/>
</RelativeLayout>

As you can see my parent ViewGroup is RelativeLayout, which simply allows me to create a view at the bottom of screen.

Notice that I set layout padding to zero (I think: setting layout margin to zero here is not necessary, the same effect). If you'd change it, the toolbar won't use full width and it won't stick with bottom of the screen.

Then I added a Linear Layout with hardcoded height which is:

          android:layout_height="40dp"

I wanted it, that my bottom toolbar would take full available width so I set it as match_parent.

Next, I added some ImageButton views with images from Android library.

There you have two possibilities:

  • if you really want to have a toolbar like in above example just remove in every ImageButton view this line:

          android:layout_weight="1"

After removing weights and some buttons you would get a view pretty similar to expected:

  • if you want to take the full width and make every button with the same size use in your project weight as in this mine example.

Now let's go to my AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.example.piotr.myapplication"
          xmlns:android="http://schemas.android.com/apk/res/android">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:windowSoftInputMode="stateVisible|adjustResize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>

                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

In that file I'd added as you can see only one additional line:

         android:windowSoftInputMode="stateVisible|adjustResize">

to make sure that device keyboard won't hide my custom bottom toolbar.

From: How to add a bottom menu to Android activity

如果您有任何问题，请随时提问。

希望对您有所帮助