Wie kann ich die Werkzeugleiste ausblenden, wenn ich im Fragment blättern möchte?

Question

Wie Symbolleiste in meinem Fall beim Scrollen ausblenden? Ich habe Activty mit Schublade und verschachtelten Fragmenten. Ich brauche die Symbolleiste beim Scrollen in Pages ausblenden. Wie geht das? Bitte hilf mir.

P.S: Sorry für mein Englisch bitte.

Aktivität Layout:

<?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/app_nav_header_main" 
    app:menu="@menu/main_drawer" /> 

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

app_bar_main.xml

<?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" 
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" 
    app:elevation="0dp"> 

    <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> 

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

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

content_main.xml:

<?xml version="1.0" encoding="utf-8"?> 
<FrameLayout 
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/content_frame" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
app:layout_behavior="@string/appbar_scrolling_view_behavior" 
tools:showIn="@layout/app_bar_main"/> 

Fragment mit TabLayout und ViewPager:

<ViewFlipper xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:app="http://schemas.android.com/apk/res-auto" 
android:id="@+id/flipper" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical"> 

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

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

    <android.support.design.widget.TabLayout 
     android:id="@+id/tabs" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:background="?attr/colorPrimary" 
     android:elevation="2dp" 
     android:minHeight="?attr/actionBarSize" 
     android:theme="@style/AppTheme.AppBarOverlay" 
     app:tabIndicatorColor="@android:color/white" /> 

    <android.support.v4.view.ViewPager 
     android:id="@+id/pager" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 
</LinearLayout> 

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

Seite Fragment:

<?xml version="1.0" encoding="utf-8"?> 
<ViewFlipper xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/flipper" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical"> 

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

<android.support.v4.widget.SwipeRefreshLayout 
    android:id="@+id/refresh" 
    android:layout_margin="5dp" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <ListView 
     android:id="@+id/newsList" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:cacheColorHint="@android:color/transparent" 
     android:divider="@null" 
     android:dividerHeight="10dp" 
     android:listSelector="@android:color/transparent" /> 

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

<include 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center" 
    layout="@layout/layout_news_empty" /> 

<include 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center" 
    layout="@layout/layout_no_internet" /> 

</ViewFlipper> 

Answer 1

ListView funktioniert nicht mit CoordinatorLayout. Sie müssen die RecyclerView verwenden.

Dies ist, weil die ListView Schnittstellen wie NestedScrollingChild nicht implementiert, die für das Scroll-Verhalten wesentlich ist.

Für weitere Details öffnen Sie this.