RecycleView + SwipeRefreshLayout 实现下拉刷新

在这里就不具体的介绍RecycleView的用法和简介了，如果想了解更多关于RecycleView的更多介绍，可以看下我的另一篇blog，RecycleView的简单介绍：
http://blog.csdn.net/wuyinlei/article/details/50593747

在这里就简单的介绍些SwipeRefreshLayout吧：
SwipeRefreshLayout是Google官方更新的一个widget，可以实现下拉刷新的效果，该控件集成子ViewGroup在support-v4兼容包下，不过我们想要使用，必须support library的版本在19.1以上

基本使用方法：

• 1、setOnRefreshListener（OnRefreshListener）：添加下拉刷新监听器
• 2、setRefreshing（boolean）：显示或者隐藏刷新进度条
• 3、isRefreshing()：检查是否处于刷新状态
• 4、setColorSchemeResources（）：设置进度条的颜色主题（最多四个）

下面就来实例代码吧，用的有下拉刷新哦：

package com.example.ruolan.recycleview;import android.os.Bundle;import android.os.Handler;import android.support.v4.widget.SwipeRefreshLayout;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.DefaultItemAnimator;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.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private RecyclerView mRecyclerView;    private SwipeRefreshLayout mLayout;    private List<String> datas = new ArrayList<>();    private MyAdapter mAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mLayout = (SwipeRefreshLayout) this.findViewById(R.id.refreshLayout);        mRecyclerView = (RecyclerView) this.findViewById(R.id.recyclerView);        mAdapter = new MyAdapter(datas);        mRecyclerView.setAdapter(mAdapter);        //下面可以自己设置排版方式        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));        //mRecyclerView.setLayoutManager(new GridLayoutManager(this,4));        //设置分割线        mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST));        //下面一行如果不写也是会自动调用的        mRecyclerView.setItemAnimator(new DefaultItemAnimator());        mAdapter.setOnItemListener(new MyAdapter.OnItemClickListener() {            @Override            public void onClick(View v, int position, String city) {                Toast.makeText(MainActivity.this, "你好", Toast.LENGTH_SHORT).show();            }        });        //RecycleView的事件监听        //初始化数据        initDatas();        initRefreshLayout();    }    private void initRefreshLayout() {        //设置刷新的颜色        mLayout.setColorSchemeResources(                android.R.color.background_dark,                android.R.color.holo_red_dark,                android.R.color.holo_green_dark,                android.R.color.holo_orange_dark);        //拖动多长的时候开始刷新        mLayout.setDistanceToTriggerSync(100);        mLayout.setProgressBackgroundColorSchemeColor(getResources().getColor(R.color.item_press));        //设置大小        mLayout.setSize(SwipeRefreshLayout.LARGE);        //刷新监听器        mLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                new Handler().postDelayed(new Runnable() {                    @Override                    public void run() {                        for (int i = 0; i <= 10; i++){                            mAdapter.addData(i,"new City " + i);                        }                        //通知刷新                        mAdapter.notifyItemRangeChanged(0,10);                        mRecyclerView.scrollToPosition(5);                        //完成后调用完成的方法                        mLayout.setRefreshing(false);                    }                },3000);            }        });    }    private void initDatas() {        datas.add("New York");        datas.add("Bei Jing");        datas.add("Boston");        datas.add("London");        datas.add("San Francisco");        datas.add("Chicago");        datas.add("Shang Hai");        datas.add("Tian Jin");        datas.add("Zheng Zhou");        datas.add("Hang Zhou");        datas.add("Guang Zhou");        datas.add("Fu Gou");        datas.add("Zhou Kou");    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.menu_main, menu);        return super.onCreateOptionsMenu(menu);    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        switch (item.getItemId()) {            case R.id.id_action_add:                mAdapter.addData(0, "new City");                break;            case R.id.id_action_delete:                mAdapter.removeData(1);                break;            case R.id.id_action_gridview:                mRecyclerView.setLayoutManager(new GridLayoutManager(this, 4));                break;            case R.id.id_action_listview:                mRecyclerView.setLayoutManager(new LinearLayoutManager(this));                break;            case R.id.id_action_horizontalGridView:                mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.HORIZONTAL));                break;        }        return super.onOptionsItemSelected(item);    }}

package com.example.ruolan.recycleview;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import java.util.List;/** * Created by ruolan on 2015/11/11. */public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {    private List<String> mDatas;    private LayoutInflater mInflater;    private OnItemClickListener mListener;    public void setOnItemListener(OnItemClickListener listener){        mListener = listener;    }    public MyAdapter(List<String> datas){        mDatas = datas;    }    @Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        //读取布局文件        mInflater = LayoutInflater.from(parent.getContext());        View view = mInflater.inflate(R.layout.itme,parent,false);        return new ViewHolder(view);    }    @Override    public void onBindViewHolder(ViewHolder holder, int position) {        holder.mTextView.setText(mDatas.get(position));    }    public void addData(int position,String city){        mDatas.add(position,city);        notifyItemInserted(position);    }    public void removeData(int position){        mDatas.remove(position);        notifyItemRemoved(position);    }    @Override    public int getItemCount() {        return mDatas.size();    }    class ViewHolder extends RecyclerView.ViewHolder {        private TextView mTextView;        public ViewHolder(View itemView) {            super(itemView);            mTextView = (TextView) itemView.findViewById(R.id.text);            mTextView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    if (mListener != null){                        mListener.onClick(v,getLayoutPosition(),mDatas.get(getLayoutPosition()));                    }                }            });        }    }    //RecycleView的事件监听    interface  OnItemClickListener{        //自己定义        void onClick(View v,int position,String city);    }}

package com.example.ruolan.recycleview;import android.graphics.Canvas;import android.graphics.Rect;import android.support.v7.widget.RecyclerView;import android.view.View;/** * Created by ruolan on 2015/11/11. */public class MyItemDecoration extends RecyclerView.ItemDecoration{    /**     * 渲染itme的之前调用     * @param c     * @param parent     * @param state     */    @Override    public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {        super.onDraw(c, parent, state);    }    /**     * 渲染完成后调用     * @param c     * @param parent     * @param state     */    @Override    public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {        super.onDrawOver(c, parent, state);    }    /**     *     * @param outRect     * @param view     * @param parent     * @param state     */    @Override    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {        super.getItemOffsets(outRect, view, parent, state);    }}

下面的这两个用的是网上的找到。

package com.example.ruolan.recycleview;/** * Created by ruolan on 2015/11/11. *//* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * 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.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);        }    }}

下面的代码是用来布局Grid布局方式

package com.example.ruolan.recycleview;/** * Created by ruolan on 2015/11/11. */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.GridLayoutManager;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.RecyclerView.LayoutManager;import android.support.v7.widget.RecyclerView.State;import android.support.v7.widget.StaggeredGridLayoutManager;import android.view.View;public class DividerGridItemDecoration extends RecyclerView.ItemDecoration{    private static final int[] ATTRS = new int[] { android.R.attr.listDivider };    private Drawable mDivider;    public DividerGridItemDecoration(Context context)    {        final TypedArray a = context.obtainStyledAttributes(ATTRS);        mDivider = a.getDrawable(0);        a.recycle();    }    @Override    public void onDraw(Canvas c, RecyclerView parent, State state)    {        drawHorizontal(c, parent);        drawVertical(c, parent);    }    private int getSpanCount(RecyclerView parent)    {        // 列数        int spanCount = -1;        LayoutManager layoutManager = parent.getLayoutManager();        if (layoutManager instanceof GridLayoutManager)        {            spanCount = ((GridLayoutManager) layoutManager).getSpanCount();        } else if (layoutManager instanceof StaggeredGridLayoutManager)        {            spanCount = ((StaggeredGridLayoutManager) layoutManager)                    .getSpanCount();        }        return spanCount;    }    public void drawHorizontal(Canvas c, RecyclerView parent)    {        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.getLeft() - params.leftMargin;            final int right = child.getRight() + params.rightMargin                    + mDivider.getIntrinsicWidth();            final int top = child.getBottom() + params.bottomMargin;            final int bottom = top + mDivider.getIntrinsicHeight();            mDivider.setBounds(left, top, right, bottom);            mDivider.draw(c);        }    }    public void drawVertical(Canvas c, RecyclerView parent)    {        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 top = child.getTop() - params.topMargin;            final int bottom = child.getBottom() + params.bottomMargin;            final int left = child.getRight() + params.rightMargin;            final int right = left + mDivider.getIntrinsicWidth();            mDivider.setBounds(left, top, right, bottom);            mDivider.draw(c);        }    }    private boolean isLastColum(RecyclerView parent, int pos, int spanCount,                                int childCount)    {        LayoutManager layoutManager = parent.getLayoutManager();        if (layoutManager instanceof GridLayoutManager)        {            if ((pos + 1) % spanCount == 0)// 如果是最后一列，则不需要绘制右边            {                return true;            }        } else if (layoutManager instanceof StaggeredGridLayoutManager)        {            int orientation = ((StaggeredGridLayoutManager) layoutManager)                    .getOrientation();            if (orientation == StaggeredGridLayoutManager.VERTICAL)            {                if ((pos + 1) % spanCount == 0)// 如果是最后一列，则不需要绘制右边                {                    return true;                }            } else            {                childCount = childCount - childCount % spanCount;                if (pos >= childCount)// 如果是最后一列，则不需要绘制右边                    return true;            }        }        return false;    }    private boolean isLastRaw(RecyclerView parent, int pos, int spanCount,                              int childCount)    {        LayoutManager layoutManager = parent.getLayoutManager();        if (layoutManager instanceof GridLayoutManager)        {            childCount = childCount - childCount % spanCount;            if (pos >= childCount)// 如果是最后一行，则不需要绘制底部                return true;        } else if (layoutManager instanceof StaggeredGridLayoutManager)        {            int orientation = ((StaggeredGridLayoutManager) layoutManager)                    .getOrientation();            // StaggeredGridLayoutManager 且纵向滚动            if (orientation == StaggeredGridLayoutManager.VERTICAL)            {                childCount = childCount - childCount % spanCount;                // 如果是最后一行，则不需要绘制底部                if (pos >= childCount)                    return true;            } else            // StaggeredGridLayoutManager 且横向滚动            {                // 如果是最后一行，则不需要绘制底部                if ((pos + 1) % spanCount == 0)                {                    return true;                }            }        }        return false;    }    @Override    public void getItemOffsets(Rect outRect, int itemPosition,                               RecyclerView parent)    {        int spanCount = getSpanCount(parent);        int childCount = parent.getAdapter().getItemCount();        if (isLastRaw(parent, itemPosition, spanCount, childCount))// 如果是最后一行，则不需要绘制底部        {            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);        } else if (isLastColum(parent, itemPosition, spanCount, childCount))// 如果是最后一列，则不需要绘制右边        {            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());        } else        {            outRect.set(0, 0, mDivider.getIntrinsicWidth(),                    mDivider.getIntrinsicHeight());        }    }}

来布局文件看看，其实也是很简单的哈;
activity_main.xml文件

<?xml version="1.0" encoding="utf-8"?><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"                tools:context=".MainActivity"><android.support.v4.widget.SwipeRefreshLayout    android:id="@+id/refreshLayout"    android:layout_width="match_parent"    android:layout_height="wrap_content">    <android.support.v7.widget.RecyclerView        android:id="@+id/recyclerView"        android:layout_width="match_parent"        android:layout_height="wrap_content"        >    </android.support.v7.widget.RecyclerView></android.support.v4.widget.SwipeRefreshLayout></RelativeLayout>

item.xml文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:layout_width="match_parent"              android:layout_height="wrap_content"              android:background="@drawable/selector_itme_bg"              android:gravity="center"              android:padding="20dp"    >    <TextView        android:id="@+id/text"        android:layout_width="wrap_content"        android:layout_gravity="center"        android:layout_height="wrap_content"        android:gravity="center"        android:textColor="#fff"        android:textSize="20dp"        android:padding="20dp"        android:text="1" /></LinearLayout>

build.graddle文件中添加的依赖

dependencies {    compile fileTree(dir: 'libs', include: ['*.jar'])    testCompile 'junit:junit:4.12'    compile 'com.android.support:appcompat-v7:23.1.0'    compile 'com.android.support:design:23.1.0'    compile 'com.android.support:recyclerview-v7:23.0.1'}

该项目的github开源地址：

[该项目github地址] : https://github.com/wuyinlei/RecycleView-SwipeRefreshLayou
小弟也是刚刚接触，并没有什么独特见解，更不要说精通了哈，学习就是要长时间的积累。。。。
加油！！！

当然了哈，可以换成RecycleView　＋　MaterialRefreshLayout使用，可以实现下拉刷新，上拉加载等任务，MaterialRefreshLayout项目开源地址：
MaterialRefreshLayout