折叠的工具栏和nestedscrollview不能平滑滚动 [英] Collapsing toolbar and nestedscrollview not scrolling smoothly

问题描述

嵌套的滚动视图在向下滚动时可以平滑滚动，但在向上滚动时则比较缓慢.向上滚动时崩溃的工具栏(带有图像视图和框架布局)不会呈现其内容(保持空白).我已经尝试了折叠工具栏中的每个标志.

Nested scroll view scrolls smoothly on scrolling down but on scroll up it is sluggish.Collapsing toolbar(with an image view and framelayout) upon scrolling up doesn't renders its content(remains blank). I have tried every flag in collapsing toolbar.

<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:id="@+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">


<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fitsSystemWindows="true"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true"

        app:contentScrim="?attr/colorPrimary"

        app:layout_scrollFlags="scroll|exitUntilCollapsed">


        <ImageView
            android:id="@+id/backdrop"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:minHeight="100dp"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop"
            android:src="@drawable/pic"
            app:layout_collapseMode="parallax"
            app:layout_collapseParallaxMultiplier="0.5"
            app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"/>

        <include
            android:id="@+id/framelayout"
            layout="@layout/header_layout"
            app:layout_scrollFlags="scroll|enterAlways|enterAlwaysCollapsed"
            android:minHeight="100dp"/>


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


<!-- Your Scrollable View -->
<android.support.v4.widget.NestedScrollView
    android:id="@+id/nested"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="fill_vertical"

    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingTop="24dp">



      </LinearLayout>



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


<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="#da1b75"
    android:orientation="horizontal"
    android:textColor="#ffffff"
    android:theme="@style/ThemeOverlay.AppCompat.Light"
    app:layout_anchor="@id/appbar"
    app:layout_collapseMode="pin"
    app:title="">



</android.support.v7.widget.Toolbar>

推荐答案

使可嵌套滚动视图的直接子级成为可点击的(以防您只有一个子元素，添加布局并将所有UI元素放入其中，然后布局可点击)
android:clickable ="true"
我面临类似的问题，这对我有用！

Make the direct child of nested scrollview clickable ( incase you don't have just one child element,add a layout and put all your UI elements into it and make the layout clickable)
android:clickable="true"
I was facing similar issue and this worked for me !

这是我一直在努力的代码-

Here's the code I have been working on -

<?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"
tools:context="test.testrecycler.MaterialActivity"
>

<android.support.design.widget.AppBarLayout
    android:layout_width="match_parent"
    android:layout_height="300dp"
    android:theme="@style/AppTheme.AppBarOverlay"
    android:fitsSystemWindows="true"
    >
    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:contentScrim="?attr/colorPrimary"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        app:expandedTitleTextAppearance="@style/expandedappbar"
        app:collapsedTitleTextAppearance="@style/collapsedappbar"
        app:statusBarScrim="@color/colorPrimaryDark"
        >
        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:src="@drawable/sample"
            android:scaleType="centerCrop"
            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" />

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

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

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

这是具有NestedScrollView的文件 content_material.xml .它具有一个可单击的子元素(TextView).

And here is the file content_material.xml having NestedScrollView.It has one child element(TextView) which has been made clickable.

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView 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_material"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="test.testrecycler.MaterialActivity"
tools:showIn="@layout/activity_material">

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clickable="true"
    android:text="This is an association football club formed in 1983, based in the town of Dover, Kent, England. In the 1989–90 season Dover
    Athletic won the Southern League championship, but failed to gain promotion to the Football Conference as the club's ground did not meet
    the required standard. Three seasons later the team won the title again and this time gained promotion to the Conference, where they spent
    nine seasons before being relegated. The club was transferred to the Isthmian League Premier Division in 2004, but another poor season led
    the club to a further relegation. After three seasons in the Isthmian League Division One South, the club won the championship and promotion
    back to the Premier Division, and the following season won another championship and promotion to Conference South. In the 2013–14 season,
    Dover defeated Ebbsfleet United to return to the Conference Premier after a twelve-year absence. Nicknamed the Whites for their white shirts,
    they have played at the Crabble Athletic Ground since the club's formation. Their best performance in the FA Cup was reaching the third
    round proper in both the 2010–11 and 2014–15 seasons. (Full article...)
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    his time gained promotion to the Conference, where they spent
    nine seasons before being relegated. The club was transferred to the Isthmian League Premier Division in 2004, but another poor season led
    the club to a further relegation. After three seasons in the Isthmian League Division One South, the club won the championship and promotion
    back to the Premier Division, and the following season won another championship and promotion to Conference South. In the 2013–14 season,
    Dover defeated Ebbsfleet United to return to the Conference Premier after a twelve-year absence. Nicknamed the Whites for their white shirts,
    they have played at the Crabble Athletic Ground since the club's formation. Their best performance in the FA Cup was reaching the third
    round proper in both the 2010–11 and 2014–15 seasons. (Full article...)" />
</android.support.v4.widget.NestedScrollView>

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