recycleView的使用以及PullableRecyclerView实现了上拉加载下拉刷新的效果

recycleView的使用

1.添加依赖：

compile 'com.android.support:recyclerview-v7:26.0.0-alpha1' 哪个版本无所谓。

2.xml中引用

<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
</android.support.v7.widget.RecyclerView>
属性大差不差，特别的属性 百度~

3.activity中使用
recycleView.setLayoutManager(new LinearLayoutManager(this));//listview样式
final RecycleAdapter adapter = new RecycleAdapter(this, list);//实现适配器，传入数据
recycleView.setItemAnimator(new DefaultItemAnimator());//每一项的添加和删除的动画（这里是默认效果）
recycleView.setAdapter(adapter);//recycleView与适配器绑定

4.RecycleAdapter创建（继承的adapter<xxx>中xxx必须要填写）
 
 

  
  
  
  
public class RecycleAdapter extends PullableRecyclerView.Adapter<RecycleAdapter.MyViewHolder> {
    Context context;
    ArrayList<String> list;    public RecycleAdapter(Context context, ArrayList<String> list) {
        this.context = context;
        this.list = list;
    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        MyViewHolder viewHolder = new MyViewHolder(LayoutInflater.from(context).inflate(R.layout.item_transactioni_detail, parent, false));
        return viewHolder;
    }    /**     * view与数据的绑定
     *
     * @param holder     * @param position     */    @Override    public void onBindViewHolder(MyViewHolder holder, int position) {
        holder.tv_transaction_money.setText(list.get(position));
    }    /**     * 总长度
     *
     * @return     */    @Override    public int getItemCount() {
        return list.size();
    }    /**     * 增加数据
     *
     * @param position     */    public void addItem(int position) {
        list.add(position, "A");
        notifyItemInserted(position);
    }    /**     * 删除数据
     *
     * @param position     */    public void removeItem(int position) {
        list.remove(position);
        notifyItemRemoved(position);
    }    /**     * viewHodler的书写
     */
    class MyViewHolder extends RecyclerView.ViewHolder {
        TextView tv_transaction_money;        public MyViewHolder(final View itemView) {
            super(itemView);
            tv_transaction_money = (TextView) itemView.findViewById(R.id.tv_transaction_money);
        }
    }
}
  
  


  
  
5.使用时候通过add和delete相关的item即可。
  
  

  
  
adapter.addItem(0);//在recycleView的第一个位置添加，  notifyItemRemoved(position)来更新;

recycleView.scrollToPosition(0);//将
recycleView可见的移动到最上面。
PullableRecyclerView实现了上拉加载下拉刷新的效果
   
   

    
    http://blog.csdn.net/zhongkejingwang/article/details/38868463
    
    陈靖_大神的博客实现的下拉上拉刷新框架。但是里面并没有适配
    
    

    
    
RecyclerView。所以研究了一下。下面是源码。
    
    

     
     
     
     
package com.hgh.developmentframeworkhgh.pullableview;

import android.content.Context;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.util.AttributeSet;

/**
 * Created by hjg on 2017/7/25 0025.
 * @qq 347622814
 */

public class PullableRecyclerView extends RecyclerView implements Pullable {
    private int lastPosition;

    public PullableRecyclerView(Context context) {
        super(context);
    }

    public PullableRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public PullableRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    /**
     * 可以下拉
     *
     * @return
     */
    @Override
    public boolean canPullDown() {
        if (getChildCount() == 0) {
            return true;
        } else if (getChildAt(0).getTop() >= 0) {
            if (getLayoutManager() instanceof LinearLayoutManager) {
                int firstVisibleItem = ((LinearLayoutManager) getLayoutManager()).findFirstVisibleItemPosition();
                if (firstVisibleItem == 0) {
                    return true;
                }
            } else if (getLayoutManager() instanceof GridLayoutManager) {
                int firstVisibleItem = ((GridLayoutManager) getLayoutManager()).findFirstVisibleItemPosition();
                if (firstVisibleItem == 0) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 可以上拉
     *
     * @return
     */
    @Override
    public boolean canPullUp() {
        if (getChildCount() == 0) {
            return true;
        } else {
            RecyclerView.LayoutManager layoutManager = getLayoutManager();
            if (layoutManager instanceof GridLayoutManager) {
                //通过LayoutManager找到当前显示的最后的item的position
                lastPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
            } else if (layoutManager instanceof LinearLayoutManager) {
                lastPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
            } else if (layoutManager instanceof StaggeredGridLayoutManager) {
                //因为StaggeredGridLayoutManager的特殊性可能导致最后显示的item存在多个，所以这里取到的是一个数组
                //得到这个数组后再取到数组中position值最大的那个就是最后显示的position值了
                int[] lastPositions = new int[((StaggeredGridLayoutManager) layoutManager).getSpanCount()];
                ((StaggeredGridLayoutManager) layoutManager).findLastVisibleItemPositions(lastPositions);
                lastPosition = findMax(lastPositions);
            }

            //时判断界面显示的最后item的position是否等于itemCount总数-1也就是最后一个item的position
            //如果相等则说明已经滑动到最后了
            if (lastPosition == getLayoutManager().getItemCount() - 1) {
                return true;
            }
        }
        return false;

    }

    private int findMax(int[] lastPositions) {
        int max = lastPositions[0];
        for (int value : lastPositions) {
            if (value > max) {
                max = value;
            }
        }
        return max;
    }
}
     
     

     
     

     
     
自己测试了一下 ，完美的。