35

I have a NestedScrollView containing a LinearLayout and a RecyclerView (both inside a RelativeLayout).

<android.support.design.widget.CoordinatorLayout
    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:id="@+id/scroll">

    <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/lay_account">


        <LinearLayout
                android:orientation="vertical"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/white"
                android:paddingTop="10dp"
                android:id="@+id/lay_total"
                android:paddingBottom="10dp">

            <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/total"
                    android:id="@+id/lblTotal"
                    android:textSize="@dimen/text_medium"
                    android:layout_marginLeft="20dp"
                    android:textColor="@color/dark_eurakostheme_color"
                    android:textStyle="bold"/>


            <LinearLayout
                    android:orientation="horizontal"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center_vertical|center_horizontal">

                <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:id="@+id/txtTotalAmount"
                        android:textSize="@dimen/text_extra_extra_large"
                        android:gravity="center_horizontal"
                        android:textColor="@color/eurakostheme_color"/>

                <ImageView
                        android:layout_width="@dimen/icon_extra_extra_large"
                        android:layout_height="match_parent"
                        android:id="@+id/imageView3"
                        android:src="@drawable/coin_eurakos"/>
            </LinearLayout>

        </LinearLayout>

        <View
                android:layout_width="fill_parent"
                android:layout_height="1dp"
                android:id="@+id/divisor"
                android:background="@color/dividerColor"
                android:layout_alignBottom="@+id/lay_total"/>

        <android.support.v7.widget.RecyclerView
                android:layout_below="@id/lay_total"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/rclBasketAmounts"
                android:background="@android:color/white"
                android:padding="10dp">
        </android.support.v7.widget.RecyclerView>

    </RelativeLayout>

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

After loading the data into the RecyclerView, I need to change it's height programmatically like this:

RelativeLayout.LayoutParams lay_params = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
    50 + ((int) (baskets.length * getResources().getDimension(R.dimen.list_height_small))));

lay_params.addRule(RelativeLayout.BELOW, lay_total.getId());
recyclerView.setLayoutParams(lay_params);
recyclerView.setAdapter(new ListBasketAmountAdapter(baskets));

The problem is when the data has finished loading the NestedScrollView scrolls automatically scrolls to the top of the RecyclerView, hiding the LinearLayout above it. Any ideas?

Thanks.

4

4 回答 4

114

几天后，我找到了解决问题的方法。您只需要descendantFocusability在第一个布局中添加ScrollView如下：

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/lay_account"
    android:descendantFocusability="blocksDescendants">
于 2016-03-01T13:02:41.473 回答
17

kevings14 给出的解决方案有效，但对我来说没有帮助。当我添加时，我有一个RecyclerView+ 几个EditTextunderNestedScrollView

android:descendantFocusability="blocksDescendants"

在滚动视图下的主布局中。我无法集中注意力EditText。

然后我想出了这个对我有用的解决方案。

<RelativeLayout
   android:layout_width="match_parent"
   android:focusable="true"
   android:focusableInTouchMode="true"
   android:layout_height="wrap_content">
于 2016-12-25T08:48:50.000 回答
4

就我而言，我在 NestedScrollView 中使用了多个 RecyclerView。然后它对我不起作用。所以我的解决方案是，当我的数据更新完成后，我只需滚动到顶部，

yourList.setAdapter(yourListAdapter);

scrollView.post(new Runnable() {
    @Override
    public void run() {
         scrollView.fullScroll(ScrollView.FOCUS_UP);
         //scrollView.scrollTo(0,0);
    }
});
于 2017-06-13T06:51:13.457 回答
1

我有一个可以自行向上滚动的nestedscrollview。在 recyclerview 的 post run 方法中，我将 nestedscrollview 滚动到 (0,0) 并且一切正常。

    rvComments.setAdapter(adapterComment); 
    rvComments.post(new Runnable() {
        @Override
        public void run() {
            nestedScrollView.scrollTo(0, 0);
        }
    });
于 2019-09-21T19:48:25.600 回答