使用AppBarLayout时TabLayout不可见?

问题描述:

在我的应用程序正在使用抽屉式导航,我主活动布局是这样的:使用AppBarLayout时TabLayout不可见?

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/drawer_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:fitsSystemWindows="true" 
    tools:openDrawer="start"> 

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

    <android.support.design.widget.NavigationView 
     android:id="@+id/nav_view" 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     android:fitsSystemWindows="true" 
     app:headerLayout="@layout/nav_header_main" 
     app:menu="@menu/activity_main_drawer" /> 

</android.support.v4.widget.DrawerLayout> 

app_bar_main.xml是:

<?xml version="1.0" encoding="utf-8"?> 
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:fitsSystemWindows="true"> 

    <android.support.design.widget.AppBarLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:theme="@style/AppTheme.AppBarOverlay"> 

     <android.support.v7.widget.Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      android:background="?attr/colorPrimary" 
      app:popupTheme="@style/AppTheme.PopupOverlay" /> 


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

    <FrameLayout 
     android:id="@+id/containerView" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:orientation="vertical"></FrameLayout> 

    <!-- <include layout="@layout/content_main" /> --> 

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

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

tab_fragment.xml是:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior"> 

    <android.support.design.widget.TabLayout 
     android:id="@id/sliding_tabs" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:background="@color/colorPrimary" 
     app:tabGravity="fill" 
     app:tabMaxWidth="0.0dip" 
     app:tabMode="fixed" 
     app:tabTextColor="@android:color/white" /> 


    <android.support.v4.view.ViewPager 
     android:id="@id/viewpager" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:background="@color/white" /> 


</LinearLayout> 

一切工作正常,标签片段成功加载数据,但标签不显示。它似乎标签隐藏在工具栏/ appBarLayout后面。有人请帮助我如何重新安排我的代码显示标签?

添加下面的属性,在FrameLayout

app:layout_behavior="@string/appbar_scrolling_view_behavior"