如何在Android中像谷歌一样进行水平滚动？

Question

我试图像谷歌一样进行水平滚动.就像这样:

它滚动的东西就像ViewPager.只关注左侧的一个项目.但是当我实现RecyclerView和Horizo​​ntal LineararLayout管理器,但滚动顺利但不像谷歌播放.代码已经给出了下面,任何人都可以帮助我使滚动完全像谷歌播放滚动？

Recyclerview宣言:

RecyclerView nowShowingMovies;

.......

LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false);
nowShowingMovies.setLayoutManager(layoutManager);
nowShowingMovies.setHasFixedSize(true);

NowShowingAdapter adapter = new NowShowingAdapter(getActivity());
nowShowingMovies.setAdapter(adapter);

适配器布局:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <LinearLayout
        android:clickable="true"
        android:paddingRight="10dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <ImageView
            android:id="@+id/movieImage"
            android:layout_width="144dp"
            android:layout_height="200dp"/>

    </LinearLayout>

</LinearLayout>

AdapterClass:

public class NowShowingAdapter extends RecyclerView.Adapter<NowShowingAdapter.NowShowingViewHolder> {

    MovieListClick movieListClick;

    ArrayList<MovieListModel> movieListModel;
    int movieImageId[] = new int[]{
        R.drawable.kubo_image,
        R.drawable.batman1,
        R.drawable.jugnle_1,
        R.drawable.kanfu_1,
        R.drawable.peanuts,
        R.drawable.sweetheart
    };
    Context context;

    public NowShowingAdapter(Context context){
        this.context = context;
    }

    @Override
    public NowShowingViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.movie_for_list,null,false);
        return new NowShowingViewHolder(view);
    }

    @Override
    public void onBindViewHolder(NowShowingViewHolder holder, int position) {
        holder.movieImage.setImageResource(movieImageId[position]);
    }

    public void setOnMovieClickListener(MovieListClick movieListClick){
        this.movieListClick = movieListClick;
    }

    @Override
    public int getItemCount() {
        return movieImageId.length;
    }

    public class NowShowingViewHolder extends RecyclerView.ViewHolder {

        public ImageView movieImage;
        public NowShowingViewHolder(View itemView) {
            super(itemView);
            movieImage = (ImageView) itemView.findViewById(R.id.movieImage);
            movieImage.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    movieListClick.onMovieClick(getLayoutPosition());
                }
            });
        }

    }
}

Answer 1

支持库现在包含用于此行为的两个不同的类。

LinearSnapHelper linearSnapHelper = new LinearSnapHelper();
linearSnapHelper.attachToRecyclerView(recyclerView);

就是这样。

如果您想要更多自定义，您需要扩展LinearSnapHelperorPagerSnapHelper和重写calculateDistanceToFinalSnap方法。

Answer 2

RecyclerView通常用于显示列表或任何集合。Recycler View 有自己的垂直或水平滚动行为。为此，我们必须为布局行为定义 LayoutManager。这里我举一个例子，RecyclerView是如何声明和添加布局管理器的：

RecyclerView rvBotCollection;
rvBotCollection =(RecyclerView)itemView.findViewById(R.id.rvCollectionList);

然后将添加一个适配器以通过项目视图显示整个列表。现在我们可以让它水平滚动，如下所示：

rvBotCollection.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));

现在RecyclerView将以水平方式滚动。但主要问题是视图一次会滚动多个项目。使用 SnapHelper 我们可以像这样一次滚动单个项目：

SnapHelper snapHelper = new PagerSnapHelper();
snapHelper.attachToRecyclerView(rvBotCollection);

这两行就会发挥魔力。