ViewPager里面的Recyclerview里面的scrollview无法正常工作

Question

我有一个xml布局,其中包含以下视图Scrollview-> RelativeLayout-> Some Views + Tablayout + ViewPager-> Recylerview(在ViewPager的片段中).ViewPager有一些固定的高度(保持它"Wrap_Content"根本不显示它.)现在的问题是Recylerview永远不会滚动.我已经尝试了几个已经发布过的解决方案,例如在"嵌套Scrollview"中使用 Wraping viewpager 或者甚至使LinearLayout成为子项.但没有工作.

下面是我的xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/btn_startdraw"
        android:fillViewport="true"
        android:gravity="center">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:padding="@dimen/_5sdp">


            <TextView
                android:id="@+id/invites_accepted"
                style="@style/bodyStyleBlue"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/committee_slots"
                android:text="@string/invites_accepted" />

               <!-- A lot of other Textfields for data display-->

                <android.support.design.widget.TabLayout
                android:id="@+id/tabs_pendingcommittee"
                style="@style/TabStyle"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/draw_mode_val"
                app:tabMode="fixed"></android.support.design.widget.TabLayout>b


            <com.apponative.committeeapp.ui.custom.CustomViewPager
                android:id="@+id/pending_member_view"
                android:layout_width="match_parent"
                android:layout_height="@dimen/_250sdp"
                android:layout_below="@+id/tabs_pendingcommittee"
                app:layout_behavior="@string/appbar_scrolling_view_behavior" />

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

    <!-- Some other views on bottom-->
</RelativeLayout>

Viewpager显示的片段有以下布局xml:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white">

    <TextView
        style="@style/bodyStyleBold1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="No People..." />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/contact_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/title"
        android:background="@color/white"></android.support.v7.widget.RecyclerView>
</FrameLayout>

我已经尝试在Recyclerview上使用nestedScrollingEnabled和setFixedHeight属性.但是没什么用的.

Answer 1

我想通了,问题是不与RecyclerView内ViewPager或滚动型的,但问题是与ViewPager内滚动型.当我将ViewPager放在ScrollView中时,其Wrap_Content属性不起作用,因此固定高度限制RecyclerView内容完全显示.所以我通过自定义ViewPager的onMeasure方法解决了这个问题,并且它运行顺畅.无需包装NestedScroll视图或其他给定的解决方案.

下面是我的CustomView寻呼机的代码,它在作为子项添加到ScrollView时包装内容:

public class CustomViewPager extends ViewPager {

    boolean canSwipe = true;

    public CustomViewPager(Context context) {
        super(context);
    }

    public CustomViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        View child = getChildAt(getCurrentItem());
        if (child != null) {
            child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
            int h = child.getMeasuredHeight();
            heightMeasureSpec = MeasureSpec.makeMeasureSpec(h, MeasureSpec.EXACTLY);
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    public void canSwipe(boolean canSwipe) {
        this.canSwipe = canSwipe;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (this.canSwipe) {
            return super.onTouchEvent(event);
        }

        return false;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        if (this.canSwipe) {
            return super.onInterceptTouchEvent(event);
        }

        return false;
    }
}

Answer 2

添加NestedScrollView然后设置recyclerView.setNestedScrollingEnabled(false);

检查您是否已经拥有这个 android.support.v7.widget.RecyclerView

请记住，RecyclerView 元素有自己的滚动条

 <android.support.v7.widget.RecyclerView
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />

将 ScrollView 替换为android.support.v4.widget.NestedScrollView适用于所有版本。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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.support.v4.widget.NestedScrollView
        style="@style/ScrollBarStyle"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/btn_startdraw"
        android:fillViewport="true"
        android:gravity="center">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:padding="@dimen/_5sdp">


            <TextView
                android:id="@+id/invites_accepted"
                style="@style/bodyStyleBlue"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@+id/committee_slots"
                android:text="@string/invites_accepted" />

               <!-- A lot of other Textfields for data display-->

                <android.support.design.widget.TabLayout
                android:id="@+id/tabs_pendingcommittee"
                style="@style/TabStyle"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@+id/draw_mode_val"
                app:tabMode="fixed"></android.support.design.widget.TabLayout>b


            <com.apponative.committeeapp.ui.custom.CustomViewPager
                android:id="@+id/pending_member_view"
                android:layout_width="match_parent"
                android:layout_height="@dimen/_250sdp"
                android:layout_below="@+id/tabs_pendingcommittee"
                app:layout_behavior="@string/appbar_scrolling_view_behavior" />

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

    <!-- Some other views on bottom-->
</RelativeLayout>

我希望它有效！:) 如果不起作用，请告诉我！我会尝试找出为什么它不起作用:)祝你有美好的一天！