gridview内部的嵌套滚动视图只能使用somepart

问题描述

我有：
1.Coordinator布局
2.appbar布局（协调员布局的子元素）
3.Collapsing工具栏布局（应用栏的子元素）
4.NestedScrollView （协调员的孩子）

我想在 NestedScrollView 该用户可以滚动整个屏幕空间。

我的问题是目前gridview占用 NestedScrollView ，而不是全部空间 NestedScrollView ，并在该部分内滚动，如图所示：

我的xml文件是：

 <？xml version =1.0encoding =utf-8？ > 
  

  android：layout_width =match_parent
 android：id =@ + id / app_bar
 android：layout_height =wrap_content 
 android：theme =@ style / AppTheme.AppBarOverlay> 
 
< android.support.design.widget.CollapsingToolbarLayout 
 android：id =@ + id / collapsing_toolbar
 android：layout_width =match_parent
 android ：layout_height =196dp
 android：background =＃3f51b5
 app：contentScrim =@ color / colorPrimary
 app：expandedTitleMarginEnd =64dp
 app：expandedTitleMarginStart =48dp
 app：layout_scrollFlags =scroll | exitUntilCollapsed> 
 
 
< ImageView 
 android：id =@ + id / imageview
 android：layout_width =match_parent
 android：layout_height = match_parent
 android：scaleType =centerCrop
 android：src =@ drawable / index
 app：layout_collapseMode =parallax/> 
 
< android.support.v7.widget.Toolbar 
 android：id =@ + id / toolbar
 android：layout_width =match_parent
 android ：layout_height =？attr / actionBarSize
 app：layout_collapseMode =pin
 app：layout_scrollFlags =scroll | enterAlways
 app：popupTheme =@ style / AppTheme.PopupOverlay/ > 
 < /android.support.design.widget.AppBarLayout> 
< android.support.v4.widget.NestedScrollView 
 android：layout_width =match_parent
 android：layout_height =match_parent
 app：layout_behavior =@ string / appbar_scrolling_view_behavior > 
 
< GridView 
 android：layout_width =match_parent
 android：layout_height =match_parent
 android：layout_marginLeft =1dp
 android： layout_marginRight =1dp
 
 android：id =@ + id / gridView
 android：verticalSpacing =1dp
 android：horizo​​ntalSpacing =1dp
 android：numColumns =2
 android：stretchMode =columnWidth/> 
 
< /android.support.v4.widget.NestedScrollView> 
 
< android.support.design.widget.FloatingActionButton 
 android：id =@ + id / fab
 android：layout_width =wrap_content
 android ：layout_height =wrap_content
 android：layout_gravity =right | bottom
 android：layout_margin =@ dimen / fab_margin
 android：src =@ android：drawable / ic_dialog_email/ > 
  

解决方案

GridView 已经内置了滚动功能，因此它与 NestedScrollView 冲突。您应该使用带有 GridLayoutManager 和 appbar_scrolling_view_behavior 的 RecyclerView 布局行为代替 NestedScrollView 。

I have:1.Coordinator layout2.appbar layout (child of Coordinator layout)3.Collapsing toolbar layout (child of app bar)4.NestedScrollView (child of coordinator)

I want to put a grid view inside NestedScrollView so that user can scroll over the entire screen space.

My problem is that currently the gridview occupies a small portion of the NestedScrollView and not full space of NestedScrollView and scrolls inside that portion,like in this image:

As you can see my gridview height is limited upto only that highlighted portion in sky blue color, i want that to occupy the entire screen space below that image(which is my Collapsing toolbar).i tried different ways but nothing works out.my xml file is:

<?xml version="1.0" encoding="utf-8"?>

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

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="196dp"
        android:background="#3f51b5"
        app:contentScrim="@color/colorPrimary"
        app:expandedTitleMarginEnd="64dp"
        app:expandedTitleMarginStart="48dp"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">


        <ImageView
            android:id="@+id/imageview"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="centerCrop"
            android:src="@drawable/index"
            app:layout_collapseMode="parallax" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/AppTheme.PopupOverlay" />
    </android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="1dp"
        android:layout_marginRight="1dp"

        android:id="@+id/gridView"
        android:verticalSpacing="1dp"
        android:horizontalSpacing="1dp"
        android:numColumns="2"
        android:stretchMode="columnWidth"/>

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

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

解决方案

GridView already has scrolling built in, so it conflicts with a NestedScrollView. You should be using a RecyclerView with a GridLayoutManager and appbar_scrolling_view_behavior layout behavior in place of the NestedScrollView.

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