水平RecyclerViews内垂直RecyclerView滚动混蛋

时间：2015-08-27 07:38:01

标签： scroll android-recyclerview

我正在使用一种布局，其中我使用了多个RecyclerViews（水平）作为RecyclerView的项目视图。问题是垂直滚动不像我期望的那样平滑。垂直滚动时会有一些混乱（Parent RecyclerView）。

如何删除这些垂直滚动混蛋？我曾经在Parent RecyclerView的OnBindViewHolder（）方法中将适配器设置为水平RecyclerViews。

3 个答案:

答案 0 :(得分：14)

我已经解决了这个问题。在这种情况下，滚动性能要好得多。 不要在Parent RecyclerView的OnBindViewHolder（）方法中将适配器设置为水平RecyclerViews。而不是在第一次通过带有空或null dataList的RecyclerView的onCreateViewHolder（）创建视图时设置它。 只需用onBindViewHolder（）中的前一个空列表替换新的二级数据列表，并将notifydataSetChanged（）调用到Horizo​​ntalAdapetr。这比onBindViewHolder（）中的setAdapter（）要好得多。

答案 1 :(得分：3)

您可以尝试这种方式

主要活动 

input

垂直回收视图适配器 

public void initialize(List<List<ResponseObject>> responseObjectList) {
    RecyclerView upperRecyclerView = (RecyclerView) this.findViewById(R.id.main_layout);
    upperRecyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
    VerticalAdapter adapter = new VerticalAdapter(this, responseObjectLists);
    upperRecyclerView.setAdapter(adapter);
    adapter.notifyDataSetChanged();
}

水平循环视图适配器 

public class VerticalAdapter extends RecyclerView.Adapter<VerticalAdapter.Holder> {

    final private SearchActivity activity;
    List<List<ResponseObject>> list;

    public VerticalAdapter(SearchActivity activity, List<List<ResponseObject>> lists) {
        this.list = lists;
        this.activity = activity;
    }

    public Holder onCreateViewHolder(ViewGroup parent,int viewType) {
        View itemLayoutView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.vertical_layout, null);
        return new Holder(itemLayoutView);
    }

    public void onBindViewHolder(Holder viewHolder, int position) {
        List<ResponseObject> objectList = list.get(position);
        viewHolder.packageTitle.setText(objectList.get(0).getTag());
        ImageAdapter imageAdapter = new ImageAdapter(activity, objectList);
        viewHolder.horizontalRecyclerView.setLayoutManager(new LinearLayoutManager(activity, LinearLayoutManager.HORIZONTAL, false));
        viewHolder.horizontalRecyclerView.setAdapter(imageAdapter);
        viewHolder.horizontalRecyclerView.setNestedScrollingEnabled(false);
        imageAdapter.notifyDataSetChanged();
    }

    public final static class Holder extends RecyclerView.ViewHolder {

        protected TextView packageTitle;
        protected RecyclerView horizontalRecyclerView;

        public Holder(View view) {
            super(view);
            this.packageTitle = (TextView) view.findViewById(R.id.recycleViewTitle);
            this.horizontalRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
            this.horizontalRecyclerView.setLayoutManager(new LinearLayoutManager(this.horizontalRecyclerView.getContext(), LinearLayoutManager.HORIZONTAL, false));
            this.horizontalRecyclerView.setNestedScrollingEnabled(false);
            horizontalRecyclerView.setAdapter(null);
        }
    }

    public int getItemCount() {
        return ListUtil.isEmpty(list) ? 0 : list.size();
    }
}

<强> main_layout.xml 

public class ImageAdapter extends     RecyclerView.Adapter<ImageAdapter.ViewHolder> {

    private List<ResponseObject> mainPageResponseList;
    private SearchActivity activity;

    public ImageAdapter(SearchActivity activity, List mainPageResponseList) {
        this.mainPageResponseList = mainPageResponseList;
        this.activity = activity;
    }

    public ImageAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemLayoutView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.horizontal_layout_view, null);
        ViewHolder viewHolder = new ViewHolder(itemLayoutView);
        return viewHolder;
    }

    public void onBindViewHolder(ViewHolder viewHolder, int position) {
        ResponseObject object = mainPageResponseList.get(position);
        Util.setImageUsingGlide(object.getImage(), viewHolder.imageView);
        viewHolder.packageName.setText(object.getDestination());
        viewHolder.packagePrice.setText(object.getPrice() + "");
        viewHolder.imageView.setOnClickListener(null);
    }

    public final static class ViewHolder extends RecyclerView.ViewHolder {

        protected ImageView imageView;
        protected TextView packageName;
        protected TextView packagePrice;

        public ViewHolder(View view) {
            super(view);
            this.imageView = (ImageView) view.findViewById(R.id.packageImage);
            this.packageName = (TextView) view.findViewById(R.id.packageName);
            this.packagePrice = (TextView) view.findViewById(R.id.packagePrice);
        }
    }

    public int getItemCount() {
        return ListUtil.isEmpty(mainPageResponseList) ? 0 : mainPageResponseList.size();
    }
}

<强> vertical_layout.xml 

<?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"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
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="match_parent"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleMarginEnd="64dp"
        app:expandedTitleMarginStart="48dp"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

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

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <ImageView
                    android:id="@+id/ivHolidayMainImage"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:fitsSystemWindows="true"
                    android:scaleType="centerCrop"
                    app:layout_collapseMode="parallax" />

                <ImageView
                    android:id="@+id/ivHotelImage"
                    android:layout_width="match_parent"
                    android:layout_height="80dp"
                    android:layout_alignTop="@id/ivHolidayMainImage"
           android:background="@drawable/gradient_from_up_hotel_image" />

                <RelativeLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="10dp"
                    android:layout_marginRight="10dp"
                    android:layout_marginTop="250dp">
                    <RelativeLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentLeft="true">
                        <TextView
                            android:id="@+id/mainPackageTitle"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:text="Popular Pick"
                            android:textColor="@color/white"
                            android:textSize="12dp" />
                        <TextView
                            android:id="@+id/mainPackageName"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_below="@+id/mainPackageTitle"
                            android:text="Andaman Islands"
                            android:textColor="@color/white"
                            android:textSize="18dp" />
                    </RelativeLayout>
                    <RelativeLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_alignParentRight="true"
                        android:layout_marginLeft="50dp"
                        android:layout_marginRight="10dp">
                        <TextView
                            android:id="@+id/mainPackagePrice"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:text="25000"
                            android:textColor="@color/white"
                            android:textSize="18dp" />
                        <TextView
                            android:id="@+id/journeyType"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_below="@+id/mainPackagePrice"
                            android:text="Popular Pick"
                            android:textColor="@color/white"
                            android:textSize="12dp" />
                    </RelativeLayout>
                </RelativeLayout>
            </RelativeLayout>

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:layout_marginTop="-100dp"
         android:background="@drawable/gradient_from_down_hotel_image" />
        </app.viaindia.views.ViaLinearLayout>

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

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

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

<android.support.v7.widget.RecyclerView
    android:id="@+id/main_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

<android.support.design.widget.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:clickable="true"
    android:src="@drawable/ic_sms_black"
    app:layout_anchor="@id/appbar"
    app:layout_anchorGravity="bottom|right|end" />

<强> holizontal_layout.xml 

<LinearLayout 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="wrap_content"
android:orientation="vertical"
android:paddingLeft="5dp"
android:paddingRight="5dp">
<TextView
    android:id="@+id/recycleViewTitle"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="5dp"
    android:text="Beaches"
    android:textColor="@color/black_light"
    android:textSize="20dp" />
<android.support.v7.widget.RecyclerView
    android:id="@+id/recyclerView"
    android:layout_width="match_parent"
    android:layout_height="160dp"
    android:layout_gravity="center"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

答案 2 :(得分：1)

尝试onbindViewHolder（）中的notifydatasetChanged（）而不是setAdapter（）。 SetAdapter（）比通知数据集更改更耗时。

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