CollapsingToolbarLayout对NestedScrollView无效

问题描述

我做了一个活动，其中图像应该用工具栏折叠，只有下面的文本才可见。但是当工具栏折叠时，工具栏和NestedScrollView之间显示了很大的差距。

 < android.support.design.widget。 CoordinatorLayout xmlns：app =http://schemas.android.com/apk/res-auto
 xmlns：android =http://schemas.android.com/apk/res/android
 android：id =@ + id / coordinatorLayout
 android：layout_width =match_parent
 android：background =@ color / white
 android：layout_height =match_parent> 
 
< android.support.design.widget.AppBarLayout 
 android：id =@ + id / appBarLayout
 android：layout_width =match_parent
 app ：elevation =5dp
 app：layout_collapseMode =pin
 android：fitsSystemWindows =true
 android：layout_height =wrap_content> 
 
< android.support.design.widget.CollapsingToolbarLayout 
 android：layout_width =match_parent
 android：layout_height =wrap_content
 app：toolbarId = @ + id / toolbar
 android：id =@ + id / collapsing
 android：fitsSystemWindows =true
 app：contentScrim =？attr / colorPrimary
应用程式：layout_scrollFlags = 滚动| exitUntilCollapsed > 
 
< com.noframe.farmisagronom.util.ResizibleImageView 
 android：id =@ + id / image_view
 android：layout_width =match_parent
 android ：layout_height =wrap_content
 app：layout_scrollFlags =scroll | enterAlwaysCollapsed
 android：minHeight =100dp
 android：maxHeight =400dp
 android：fitsSystemWindows = true
应用程序：layout_collapseMode =视差
应用程序：layout_collapseParallaxMultiplier =0.5
 android：scaleType =centerCrop/> 
 
< android.support.v7.widget.Toolbar 
 android：id =@ + id / toolbar
 android：layout_width =match_parent
 android ：layout_height =？attr / actionBarSize
 android：popupTheme =@ style / ThemeOverlay.AppCompat.Light
 android：minHeight =？attr / actionBarSize
 app：layout_collapseMode = pin
 /> 
 
< /android.support.design.widget.CollapsingToolbarLayout> 
< /android.support.design.widget.AppBarLayout> 
< android.support.v4.widget.NestedScrollView 
 android：id =@ + id / nesteview
 app：layout_anchorGravity =top
 android：layout_width = match_parent
 android：layout_height =match_parent
 app：layout_behavior =@ string / appbar_scrolling_view_behavior> 
 ..... 
< /android.support.v4.widget.NestedScrollView> 
< /android.support.design.widget.CoordinatorLayout> 
  

这个活动看起来真的很好。

但是当我向上滚动NestedScrollView时，它失去控制。

工具栏和文字之间的空间很小。请注意，如果NestedScrollView中的大文本问题不会显示，但是如果NestedScrollView +折叠的工具栏不占用所有手机屏幕，那么

解决方案

添加：

  android：layout_gravity =fill_vertical
  

NestedScrollView为我工作。

I made an activity where image should collapse with toolbar and only text below would be visible. But When Toolbar being collapsed, there shows up a large gap between Toolbar and NestedScrollView

<android.support.design.widget.CoordinatorLayout xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/coordinatorLayout"
    android:layout_width="match_parent"
    android:background="@color/white"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appBarLayout"
        android:layout_width="match_parent"
        app:elevation="5dp"
        app:layout_collapseMode="pin"
        android:fitsSystemWindows="true"
        android:layout_height="wrap_content">

        <android.support.design.widget.CollapsingToolbarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:toolbarId="@+id/toolbar"
            android:id="@+id/collapsing"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <com.noframe.farmisagronom.util.ResizibleImageView
                android:id="@+id/image_view"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_scrollFlags="scroll|enterAlwaysCollapsed"
                android:minHeight="100dp"
                android:maxHeight="400dp"
                android:fitsSystemWindows="true"
                app:layout_collapseMode="parallax"
                app:layout_collapseParallaxMultiplier="0.5"
                android:scaleType="centerCrop"/>

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                android:minHeight="?attr/actionBarSize"
                app:layout_collapseMode="pin"
                />

        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>
    <android.support.v4.widget.NestedScrollView
        android:id="@+id/nesteview"
        app:layout_anchorGravity="top"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">
         .....
    </android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>

And this activity looks really good.

But when i scroll up the NestedScrollView this goes out of control.

This little space between toolbar and text is getting on my nerves.

note that if there is large text in NestedScrollView problem won't show up, but if NestedScrollView + collapsed tool bar doesn't take all phone screen, then there is a gap between them.

解决方案

Adding:

android:layout_gravity="fill_vertical"

to the NestedScrollView worked for me.

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