RecyclerView的使用技巧

参考文章：http://yat3s.com/2015/09/21/RecyclerView/

  http://blog.csdn.net/liyuanjinglyj/article/details/50409576

RecyclerView(ListView)在一个App中出现的频率还是非常高的，它是官方出的一个用来替代ListView、GridView的控件，下面简单的介绍一下RecyclerView中一些简单的使用技巧。

官方

官方网址(需要翻墙)

https://developer.android.com/reference/android/support/v7/widget/RecyclerView.html

官方给出的一句话解释是：

A flexible view for providing a limited window into a large data set.

Gradle

compile ‘com.android.support:recyclerview-v7:+’

建议搭配cardView使用

compile ‘com.android.support:cardview-v7:+’

使用

RecyclerView使用起来很简单，但相比于ListView来说，使用的方法还是有一点改变的。

1234

<android.support.v7.widget.RecyclerView 注意V7兼容包名 否则只能api 21才能用    android:id="@+id/recyclerView"    android:layout_width="match_parent"    android:layout_height="wrap_content"/>

1234567

RecyclerView recyclerView = (RecyclerView)findViewById(R.id.recyclerView);recyclerView.setLayoutManager(new LinearLayoutManager(this));//线性显示(默认纵向显示) 类似于ListView// recyclerView.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false));//线性显示(横向显示)// recyclerView.setLayoutManager(new GridLayoutManager(this, 2));//线性宫格显示 类似于GridView// recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, OrientationHelper.VERTICAL));//瀑布流显示recyclerView.setAdapter(new RecyclerViewAdapter(this,data));

1234567891011121314151617181920212223242526272829303132333435363738394041

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {    private Context context;    private List<Post> posts;    public RecyclerViewAdapter(Context context, List<Post> posts) {        this.context = context;        this.posts = posts;    }    @Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View v = LayoutInflater.from(parent.getContext())                .inflate(R.layout.item_post, parent,false);        ViewHolder vh = new ViewHolder(v);        return vh;    }    @Override    public void onBindViewHolder(ViewHolder vh, int position) {        vh.contentTv.setText(posts.get(position).getContent());    }    @Override    public int getItemCount() {        return posts.size();    }    public class ViewHolder extends RecyclerView.ViewHolder {        private TextView contentTv;        public ViewHolder(View itemView) {            super(itemView);            contentTv = (TextView) itemView.findViewById(R.id.content_post_tv);            itemView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    //你的点击事件                }            });        }    }}

做到这里就算完成了。

—————————–分割线—————————-

这些是简单的使用，不过我们可以写一个万能的Adapter来适配每一个RecyclerView，请往下看

12345678910111213141516

public class RVHolder  extends RecyclerView.ViewHolder {    private ViewHolder viewHolder;    public RVHolder(View itemView) {        super(itemView);        viewHolder=ViewHolder.getViewHolder(itemView);    }    public ViewHolder getViewHolder() {        return viewHolder;    }}

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758

public abstract class AutoRVAdapter extends RecyclerView.Adapter<RVHolder> {    public final static Integer VIEW_ITEM = 101;    public final static Integer VIEW_PROG = 100;    public List<?> list;    public Context context;    public AutoRVAdapter(Context context, List<?> list) {        this.list = list;        this.context = context;    }    @Override    public RVHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = LayoutInflater.from(context).inflate(onCreateViewLayoutID(viewType),parent,false);        return new RVHolder(view);    }    public abstract int onCreateViewLayoutID(int viewType);    @Override    public void onViewRecycled(final RVHolder holder) {        super.onViewRecycled(holder);    }    @Override    public void onBindViewHolder(final RVHolder holder, final int position) {        onBindViewHolder(holder.getViewHolder(), position);        if (onItemClickListener != null) {            holder.itemView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    onItemClickListener.onItemClick(null, v, holder.getPosition(), holder.getItemId());                }            });        }    }    public abstract void onBindViewHolder(ViewHolder holder, int position);    @Override    public int getItemCount() {        return list.size();    }    private AdapterView.OnItemClickListener onItemClickListener;    public AdapterView.OnItemClickListener getOnItemClickListener() {        return onItemClickListener;    }    public void setOnItemClickListener(AdapterView.OnItemClickListener onItemClickListener) {        this.onItemClickListener = onItemClickListener;    }

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647

public class ViewHolder {    private SparseArray<View> viewHolder;    private View view;    public static  ViewHolder getViewHolder(View view){        ViewHolder viewHolder = (ViewHolder) view.getTag();        if (viewHolder == null) {            viewHolder = new ViewHolder(view);            view.setTag(viewHolder);        }        return viewHolder;    }    private ViewHolder(View view) {        this.view = view;        viewHolder = new SparseArray<View>();        view.setTag(viewHolder);    }    public <T extends View> T get(int id) {        View childView = viewHolder.get(id);        if (childView == null) {            childView = view.findViewById(id);            viewHolder.put(id, childView);        }        return (T) childView;    }    public View getConvertView() {        return view;    }    public TextView getTextView(int id) {        return get(id);    }    public Button getButton(int id) {        return get(id);    }    public ImageView getImageView(int id) {        return get(id);    }    public void setTextView(int  id,CharSequence charSequence){        getTextView(id).setText(charSequence);    }}

以后我们只要集成AutoRVAdapter就好了，简单方便。

123456789101112131415

public class RecyclerViewAdapter extends AutoRVAdapter{    public RecyclerViewAdapter(Context context, List<?> list) {        super(context, list);    }    @Override    public int onCreateViewLayoutID(int viewType) {        return R.layout.item_appointment;    }    @Override    public void onBindViewHolder(ViewHolder holder, int position) {        Post post = (Post) list.get(position);        holder.setTextView(R.id.text,post.getName());    }}

推荐

https://github.com/cymcsg/UltimateRecyclerView

集成了很多RecyclerView的功能，包括上拉刷新，下拉加载，加载动画，视差动画等

注意的问题

• RecyclerView嵌套在ScrollView里面是一行都不显示的(ListView显示一行)这里需要重写LayoutManager，具体可google
• 在5.0以上的手机 RecyclerView嵌套在ScrollView 重写LayoutManager后 RecyclerView的滑动惯性会消失，此时可重写ScrollView即可