内容填满时NestedScrollView向下滚动 [英] NestedScrollView scroll down itself when content is fills

问题描述

我有xml，由DrawerLayout，CoordinatorLayout和custom views，AppBarLayout，NestedScrollView组成.

I have xml, which consits of DrawerLayout, CoordinatorLayout with custom views, AppBarLayout, NestedScrollView.

问题:当NestedtScrollView中的内容填满时，NestedtScrollView会向下滚动. scrollView.setScrollY(0)或layout_behavior = FixedScrollingViewBehavior的自定义类之类的所有研究都没有帮助我.

Problem: When content in NestedtScrollView fills, NestedtScrollView scrolls down itself. All researches like scrollView.setScrollY(0) or custom class for layout_behavior = FixedScrollingViewBehavior didn't help me.

如何防止滚动

    <android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">


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

    <android.support.design.widget.CoordinatorLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:id="@+id/main_content"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1">

        <android.support.design.widget.AppBarLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fitsSystemWindows="true"
                android:background="@color/semitransparet_color_primary">

            <android.support.v7.widget.Toolbar
                    xmlns:android="http://schemas.android.com/apk/res/android"
                    xmlns:app="http://schemas.android.com/apk/res-auto"
                    android:id="@+id/actionbar_toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:minHeight="?attr/actionBarSize"
                    app:layout_scrollFlags="scroll|enterAlways"
                    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                    app:elevation="4dp"/>

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

        <ProgressBar
                android:id="@+id/progress"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"/>
        <android.support.v4.widget.NestedScrollView
                android:id="@+id/product_scroll_wrpr"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:visibility="gone">

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

                // my content is here

            </LinearLayout>


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



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

    <LinearLayout
            android:id="@+id/buttons_bar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:visibility="gone"
            android:background="#01579B"
            android:layout_gravity="bottom"
            android:orientation="horizontal"
            android:padding="8dp"
            android:gravity="center_vertical">

    // here are my buttons

</LinearLayout>

<android.support.design.widget.NavigationView
        android:id="@+id/navi"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        android:background="@android:color/white"
        app:headerLayout="@layout/drawer_header_left"
        app:menu="@menu/nav_drawer_menu"/>

我的 build.gradle 同意

compile 'com.android.support:support-v4:23.1.0'

compile 'com.android.support:design:23.0.1'

推荐答案

尝试将android:descendantFocusability="blocksDescendants"设置为NestedScrollView中的LinearLayout.它对我有用.

Try to set android:descendantFocusability="blocksDescendants" to the LinearLayout inside NestedScrollView. It works for me.

UPD:谨防在布局后代元素中使用诸如EditText之类的元素，这些元素应引起关注:这些元素将不会成为关注焦点.如果您知道如何解决此问题，请告诉我们.

UPD: beware of using into the layout descendant elements like EditText, which should take a focus: that elements will not take a focus. If you know how to solve this, please let us to know.

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