RecycleView简单使用

本文参照大神的 Android RecyclerView 使用完全解析 体验艺术般的控件http://blog.youkuaiyun.com/lmj623565791/article/details/45059587，不想每次要用的时候都去翻别人的东西，自己整理下：
整体上看RecyclerView架构，提供了一种插拔式的体验，高度的解耦，异常的灵活，通过设置它提供的不同LayoutManager，ItemDecoration , ItemAnimator实现令人瞠目的效果。

控制其显示的方式，请通过布局管理器LayoutManager
控制Item间的间隔（可绘制），请通过ItemDecoration
控制Item增删的动画，请通过ItemAnimator
控制点击、长按事件，请自己写（擦，这点尼玛。）

基本使用：
首先添加依赖：

compile 'com.android.support:recyclerview-v7:23.2.1'

         //设置固定大小
        mRecyclerView.setHasFixedSize(true);
        //得到Layoutmanager
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
        mRecyclerView.setLayoutManager(layoutManager);
        //设置adapter
        mRecyclerView.setAdapter(adapter)
        //设置Item增加、移除动画
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());
        //添加分割线
        mRecyclerView.addItemDecoration(new DividerItemDecoration(
                getActivity(), DividerItemDecoration.HORIZONTAL_LIST));

使用起来还是比较简单的，和listView差不多，只是他比listView提交了更多的拓展性。更注重于性能的提高。可以看出其高度的解耦，给予你充分的定制自由（所以你才可以轻松的通过这个控件实现ListView,GirdView，瀑布流等效果）。
adapter也有点不一样，不是继承BaseAdapter,而是继承RecyclerView.Adapter

package com.example.administrator.treasurehunt.adapter;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.example.administrator.treasurehunt.R;

import java.util.List;

/**
 * Created by Administrator on 2016/3/16.
 */
public class RankAdapter extends RecyclerView.Adapter {
    public  interface OnRecyclerViewListener {
        void onItemClick(int position);
        boolean onItemLongClick(int position);
    }

    public static  OnRecyclerViewListener onRecyclerViewListener;

    public  static void setOnRecyclerViewListener(OnRecyclerViewListener onRecyclerViewListener) {
        RankAdapter.onRecyclerViewListener = onRecyclerViewListener;
    }

    private static final String TAG = RankAdapter.class.getSimpleName();
    private List<String> list;

    public RankAdapter(List<String> list) {
        this.list = list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.recycler_view_item, null);
        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        view.setLayoutParams(lp);
        return new PersonViewHolder(view);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int i) {
       final  PersonViewHolder holder = (PersonViewHolder) viewHolder;
        holder.position = i;
        String str = list.get(i);
        holder.nameTv.setText(str);
        holder.nameTv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onRecyclerViewListener.onItemClick(holder.position);
            }
        });
        holder.nameTv.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                onRecyclerViewListener.onItemLongClick(holder.position);
                return false;
            }
        });
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    class PersonViewHolder extends RecyclerView.ViewHolder  {
        public TextView nameTv;
        public int position;

        public PersonViewHolder(View itemView) {
            super(itemView);
            nameTv = (TextView) itemView.findViewById(R.id.recycleView_item);
        }
    }
}

xml中运用：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <android.support.v7.widget.RecyclerView
        android:id="@+id/id_recyclerview"
         android:divider="#ffff0000"
           android:dividerHeight="10dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>

接下来我们看一个RecyclerView.ItemDecoration的实现类，该类很好的实现了RecyclerView添加分割线（当使用LayoutManager为LinearLayoutManager时）。
该类参考自：DividerItemDecoration

package com.zhy.sample.demo_recyclerview;

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * limitations under the License.
 */

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.State;
import android.util.Log;
import android.view.View;


/**
 * This class is from the v7 samples of the Android SDK. It's not by me!
 * <p/>
 * See the license above for details.
 */
public class DividerItemDecoration extends RecyclerView.ItemDecoration {

    private static final int[] ATTRS = new int[]{
            android.R.attr.listDivider
    };

    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;

    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;

    private Drawable mDivider;

    private int mOrientation;

    public DividerItemDecoration(Context context, int orientation) {
        final TypedArray a = context.obtainStyledAttributes(ATTRS);
        mDivider = a.getDrawable(0);
        a.recycle();
        setOrientation(orientation);
    }

    public void setOrientation(int orientation) {
        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {
            throw new IllegalArgumentException("invalid orientation");
        }
        mOrientation = orientation;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent) {
        Log.v("recyclerview - itemdecoration", "onDraw()");

        if (mOrientation == VERTICAL_LIST) {
            drawVertical(c, parent);
        } else {
            drawHorizontal(c, parent);
        }

    }


    public void drawVertical(Canvas c, RecyclerView parent) {
        final int left = parent.getPaddingLeft();
        final int right = parent.getWidth() - parent.getPaddingRight();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            android.support.v7.widget.RecyclerView v = new android.support.v7.widget.RecyclerView(parent.getContext());
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin;
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    public void drawHorizontal(Canvas c, RecyclerView parent) {
        final int top = parent.getPaddingTop();
        final int bottom = parent.getHeight() - parent.getPaddingBottom();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int left = child.getRight() + params.rightMargin;
            final int right = left + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }

    @Override
    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
        if (mOrientation == VERTICAL_LIST) {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        } else {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        }
    }
}

添加在原来的代码中：

mRecyclerView.addItemDecoration(new DividerItemDecoration(this,
DividerItemDecoration.VERTICAL_LIST));

LayoutManager

好了，上面实现了类似ListView样子的Demo，通过使用其默认的LinearLayoutManager。

RecyclerView.LayoutManager吧，这是一个抽象类，好在系统提供了3个实现类：

LinearLayoutManager 现行管理器，支持横向、纵向。
GridLayoutManager 网格布局管理器
StaggeredGridLayoutManager 瀑布就式布局管理器
上面我们已经初步体验了下LinearLayoutManager，接下来看GridLayoutManager。

GridLayoutManager
我们尝试去实现类似GridView，秒秒钟的事情：

//mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.setLayoutManager(new GridLayoutManager(this,4));

这些只是简单的使用，更多的请参考大神的作品！
实现recycleView的刷新
http://blog.youkuaiyun.com/l_l_b/article/details/50601179