水平方向的RecyclerView

　　最近做了一个项目需要实现一个卡片式的水平滑动，但是不能手势滑动，点击卡片上的按钮之后滑动到下一个卡片，所以想到用RecyclerView实现，去掉它的手势滑动，点击按钮之后再代码控制滑动到下一个卡片。

接下来就是一步一步的实现。

1.引入RecyclerView。

compile'com.android.support:recyclerview-v7:25.+'

2.在布局文件中使用RecyclerView。

<android.support.v7.widget.RecyclerView

        android:id="@+id/recycler"

        android:layout_width="match_parent"

        android:layout_height="match_parent"/>

3.创建RecyclerView的item布局文件。

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical">

    <LinearLayout

        android:layout_width="wrap_content"

        android:layout_height="match_parent"

        android:layout_gravity="center"

        android:gravity="center"

        android:orientation="vertical">

        <TextView

            android:id="@+id/item_text"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="test"

            android:textColor="@android:color/black"

            android:textSize="36sp" />

        <Button

            android:id="@+id/item_button"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_marginTop="36dp"

            android:text="下一页"

            android:textSize="24sp" />

    </LinearLayout>

</LinearLayout>

4.实现RecyclerViewAdapter。

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.RecyclerHolder> {

    private static final String TAG = RecyclerViewAdapter.class.getSimpleName();

    private List<String> dataList;

    private Context mContext;

    private RecyclerView recyclerView;

    public RecyclerViewAdapter(Context context, List<String> dataList) {

        mContext = context;

        this.dataList = dataList;

    }

    @Override

    public RecyclerHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = LayoutInflater.from(mContext).inflate(R.layout.recycler_item_view, parent, false);

        RecyclerHolder holder = new RecyclerHolder(view);

        return holder;

    }

    @Override

    public void onBindViewHolder(RecyclerHolder holder, final int position) {

        holder.textView.setText(dataList.get(position));

        if (position == dataList.size() - 1) {

            holder.button.setVisibility(View.GONE);

        }

        holder.button.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                recyclerView.smoothScrollToPosition(position + 1);

            }

        });

    }

    @Override

    public void onAttachedToRecyclerView(RecyclerView recyclerView) {

        super.onAttachedToRecyclerView(recyclerView);

        this.recyclerView = recyclerView;

    }

    @Override

    public int getItemCount() {

        return dataList.size();

    }

    public class RecyclerHolder extends RecyclerView.ViewHolder {

        TextView textView;

        Button button;

        public RecyclerHolder(View itemView) {

            super(itemView);

            textView = (TextView) itemView.findViewById(R.id.item_text);

            button = (Button) itemView.findViewById(R.id.item_button);

        }

    }

}

5.在activity文件中设置RecyclerView。

    private RecyclerView recyclerView;

    private LinearLayoutManager mRecyclerViewLayoutManager;

    private RecyclerViewAdapter adapter;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        recyclerView = (RecyclerView) findViewById(R.id.recycler);

        List<String> datas = new ArrayList<>();

        datas.add("LiMing");

        datas.add("XiaoMing");

        datas.add("HanMeiMei");

        mRecyclerViewLayoutManager = new LinearLayoutManager(this);

        recyclerView.setLayoutManager(mRecyclerViewLayoutManager);

        adapter = new RecyclerViewAdapter(this, datas);

        recyclerView.setAdapter(adapter);

    }

6.设置RecyclerView为水平方向。

mRecyclerViewLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);

7.禁止手势滑动。

recyclerView.setOnTouchListener(new View.OnTouchListener() {

    @Override

         public boolean onTouch(View v, MotionEvent event) {

              return true;

         }

});

但是这样是有一个问题的，在item滑动的时候点击一下，item就会暂停住，不再滑动。
这个时候就需要处理一下这个问题，在item滑动的过程，不拦截点击事件，不滑动的时候拦截点击事件。

    //position是RecyclerView的item的编号。

    recyclerView.setOnTouchListener(new View.OnTouchListener() {

         @Override

         public boolean onTouch(View v, MotionEvent event) {

              Log.d(TAG,"position = "+RecyclerViewAdapter.position);

              if (isScroll) {

                   recyclerView.smoothScrollToPosition(RecyclerViewAdapter.position);

                   return false;

              } else {

                   return true;

               }

         }

    });

    recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {

         @Override

         public void onScrollStateChanged(RecyclerView recyclerView, int newState) {

              super.onScrollStateChanged(recyclerView, newState);

              if (newState == 2) {

                   isScroll = false;

              }

              if (newState == 1) {

                   isScroll = true;

              }

              if (newState == 0) {

                   isScroll = false;

              }

         }

         @Override

         public void onScrolled(RecyclerView recyclerView, int dx, int dy) {

              super.onScrolled(recyclerView, dx, dy);

         }

    });

    @Override

    protected void onDestroy() {

        Log.d(TAG,"onDestroy()");

        position = 0;

        super.onDestroy();

    }

项目的完整代码地址：https://github.com/ZhangMiao147/HorizontalRecyclerView