水平方向的RecyclerView

　　最近做了一個項目需要實現一個卡片式的水平滑動，但是不能手勢滑動，點擊卡片上的按鈕之後滑動到下一個卡片，所以想到用RecyclerView實現，去掉它的手勢滑動，點擊按鈕之後再代碼控制滑動到下一個卡片。

接下來就是一步一步的實現。

1.引入RecyclerView。

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

2.在佈局文件中使用RecyclerView。

<android.support.v7.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

3.創建RecyclerView的item佈局文件。

<?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="下一頁"
            android:textSize="24sp" />
    </LinearLayout>
</LinearLayout>

4.實現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文件中設置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.設置RecyclerView為水平方向。

mRecyclerViewLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);

7.禁止手勢滑動。

recyclerView.setOnTouchListener(new View.OnTouchListener() {
    @Override
         public boolean onTouch(View v, MotionEvent event) {
              return true;
         }
});

但是這樣是有一個問題的，在item滑動的時候點擊一下，item就會暫停住，不再滑動。
這個時候就需要處理一下這個問題，在item滑動的過程，不攔截點擊事件，不滑動的時候攔截點擊事件。

    //position是RecyclerView的item的編號。
    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();
    }

項目的完整代碼地址：https://github.com/ZhangMiao147/HorizontalRecyclerView