android - 在 fragment 中滚动时如何隐藏工具栏？

Question

在我的情况下滚动时如何隐藏工具栏？我有带有抽屉和嵌套 fragment 的 Activty。在 Pages 中滚动时我需要隐藏工具栏。怎么做？请帮我。

P.S:对不起我的英语。

Activity 布局:

<?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"/>

带有 TabLayout 和 ViewPager 的 fragment :

<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>

页面 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不适用于 CoordinatorLayout .您必须使用 RecyclerView .

这是因为 ListView没有实现像 NestedScrollingChild 这样的接口(interface)这对于滚动行为至关重要。

更多详情，请打开 this .