源码下载地址：http://download.csdn.net/detail/zhou_anzhuojinjie/9661542

话不多说直接上代码

dependencies {
    compile fileTree(include: [‘*.jar‘], dir: ‘libs‘)
    androidTestCompile(‘com.android.support.test.espresso:espresso-core:2.2.2‘, {
        exclude group: ‘com.android.support‘, module: ‘support-annotations‘
    })
    compile ‘com.android.support:appcompat-v7:24.2.1‘
    testCompile ‘junit:junit:4.12‘
    compile ‘com.android.support:recyclerview-v7:24.2.1‘
}

PullRefreshLayout

package com.linzhou.recyclerviewfresh.refresh;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.graphics.drawable.LayerDrawable;
import android.support.annotation.ColorRes;
import android.support.v4.widget.SwipeRefreshLayout;
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;
import android.util.TypedValue;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.DecelerateInterpolator;
import android.widget.ImageView;
import android.widget.RelativeLayout;

/**
 * Created by joe on 2016/10/23.
 */
public class PullRefreshLayout extends RelativeLayout {

    private int[] colors = {
            0xFFFF0000, 0xFFFF7F00, 0xFFFFFF00, 0xFF00FF00
            , 0xFF00FFFF, 0xFF0000FF, 0xFF8B00FF};

    private final int CIRCLE_BG_LIGHT = 0xFFFAFAFA;

    private MaterialProgressDrawable mProgress;

    private ValueAnimator mValueAnimator;

    private boolean mStart = false;

    private boolean mVisable = false;

    private static final int PULL_IMAGE_SIZE = 40;
    private static int PULL_IMAGE_SIZE_PX;//上拉View的大小（像素）
    private static int PULL_IMAGE_SIZE_PX_MAX ;//最大拉动的距离
    private static int PULL_IMAGE_SIZE_PX_EXECUTE ;//拉动到什么位置开始执行
    private static int PULL_IMAGE_SIZE_PX_EXECUTE_REFRESH ;//刷新是所在的位置
    private static float ROTATE_ANIM_ANGLE_PER;//根据最大距离计算旋转角度的比列
   // private static final
    private ImageView mImageView;
    private boolean mIsFirst;

    private int mStartY, mLastY;
    private RecyclerView mRecyclerView;
    //private int mFirstVisiblePosition;
    private int mLastVisiblePosition;

    private boolean mIsCanScoll;

    private boolean mVisibleCanScoll;

    private boolean mPrepareAnimation;//准备执行动画

    private boolean mIsAllowLoadMore = true;//是否可以上拉刷新

    private boolean mIsDispatch = true;//是否分发事件

    public PullRefreshLayout(Context context) {
        this(context, null);
    }

    public PullRefreshLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

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


    }

    /**
     * 是否允许下拉加载更多
     * @param allowLoadMore
     */
    public void setAllowLoadMore(boolean allowLoadMore) {
        mIsAllowLoadMore = allowLoadMore;
    }

    public boolean isAllowLoadMore() {
        return mIsAllowLoadMore;
    }

    /**
     * 设置进度圈的颜色
     * @param colors 如：0xFFFF0000
     */
    public void setColorSchemeColors(int... colors){
        this.colors = colors;
    }
    /**
     * 设置进度圈的颜色
     * @param colorResIds 如：R.color.red
     */
    public void setColorSchemeResources(@ColorRes int... colorResIds) {
        final Resources res = getResources();
        int[] colorRes = new int[colorResIds.length];
        for (int i = 0; i < colorResIds.length; i++) {
            colorRes[i] = res.getColor(colorResIds[i]);
        }
        setColorSchemeColors(colorRes);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        super.onLayout(changed, l, t, r, b);

        if (!mIsFirst) {

            createProgressView();

            over:
            for (int i = 0; i < getChildCount(); i++) {
                View childView = getChildAt(i);
                if (childView instanceof SwipeRefreshLayout) {
                    ViewGroup viewGroup = (ViewGroup) childView;
                    for (int j = 0; j < viewGroup.getChildCount(); j++) {
                        View childViewJ = viewGroup.getChildAt(j);
                        if (childViewJ instanceof RecyclerView) {
                            mRecyclerView = (RecyclerView) childViewJ;
                            break over;
                        }
                    }
                }
                if(childView instanceof RecyclerView){
                    mRecyclerView = (RecyclerView) childView;
                    break over;
                }
            }
            mIsFirst = true;
        }
    }


    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {

        if(!mIsAllowLoadMore) return super.dispatchTouchEvent(event);

        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                mStartY = (int) event.getRawY();
                break;
            case MotionEvent.ACTION_MOVE:

                if (!mStart) {
                    //如果不满足上拉的条件就直接分发事件
                    if(!canPullUp()){
                        return super.dispatchTouchEvent(event);
                    }
                    if (canPullUp() && !mIsCanScoll) {
                        showRefreshArrow();
                        mStartY = (int) event.getRawY();
                        mIsCanScoll = true;
                    } else {
                        //mStartY = (int) event.getRawY();
                        //hideRefreshArrow();
                        //hide();
                    }
                    if (mVisibleCanScoll) {
                        int endY = (int) event.getRawY();
                        int offset = mStartY - endY;
                        //System.out.println("----------------------offset:" + offset);
                        LayoutParams lp = (LayoutParams) mImageView.getLayoutParams();
                        int bottomMargin = lp.bottomMargin;
                        bottomMargin += offset;
                        if (bottomMargin >= PULL_IMAGE_SIZE_PX_MAX) {
                            bottomMargin = PULL_IMAGE_SIZE_PX_MAX;
                        }

                        if (bottomMargin <= -PULL_IMAGE_SIZE_PX) {
                            bottomMargin = -PULL_IMAGE_SIZE_PX;

                        }
                        lp.setMargins(lp.leftMargin, lp.topMargin, lp.rightMargin, bottomMargin);
                        mImageView.setLayoutParams(lp);

                        rotateAniamtor(bottomMargin * ROTATE_ANIM_ANGLE_PER);

                        mStartY = endY;
                    }

                    LayoutParams lp = (LayoutParams) mImageView.getLayoutParams();
                    //如果按住上拉时，上拉箭头向下滑动的时候事件不应分发
                    if(mVisable && lp.bottomMargin > -PULL_IMAGE_SIZE_PX){
                        mIsDispatch = false;
                    }else if(mVisable && lp.bottomMargin == -PULL_IMAGE_SIZE_PX){//等到上拉箭头被隐藏掉的时候在分发事件
                        mIsDispatch = true;
                    }

                    //是否分发事件
                    if(!mIsDispatch) {
                        return false;
                    }
                    else {
                        return super.dispatchTouchEvent(event);
                    }
                }
                break;

            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_CANCEL:

                if (!mStart) {

                    if (mVisibleCanScoll) {
                        LayoutParams lp = (LayoutParams) mImageView.getLayoutParams();
                        if (lp.bottomMargin >= PULL_IMAGE_SIZE_PX_EXECUTE) {
                            //lp.setMargins(lp.leftMargin, lp.topMargin, lp.rightMargin, PULL_IMAGE_SIZE_PX / 3 * 2);
                            //mImageView.setLayoutParams(lp);
                            //start();
                            getValueToTranslation();
                            mPrepareAnimation = true;

                            if (mOnPullListener != null) {
                                mOnPullListener.onLoadMore(this);
                            }
                        } else {

                            hideArrow();

                        }
                    }
                    if (!mStart && !mPrepareAnimation)
                        hideArrow();
                }

                mIsCanScoll = false;

                break;
        }

        return super.dispatchTouchEvent(event);
    }

    private void hideArrow() {
        LayoutParams lp = (LayoutParams) mImageView.getLayoutParams();
        //lp.setMargins(lp.leftMargin, lp.topMargin, lp.rightMargin, -PULL_IMAGE_SIZE_PX);
        //mImageView.setLayoutParams(lp);

        translationTo(lp.bottomMargin,-PULL_IMAGE_SIZE_PX,false);

    }

    private void showRefreshArrow() {
        mImageView.setVisibility(View.VISIBLE);

        visable();
    }

    /**
     * 隐藏箭头显示的载体ImageView
     */
    private void hideRefreshArrow() {
        mImageView.setVisibility(View.GONE);
    }


    private boolean canPullUp() {
        if(mRecyclerView == null || mRecyclerView.getAdapter() == null) return false;
        RecyclerView.LayoutManager lm = mRecyclerView.getLayoutManager();
        mLastVisiblePosition = getLastVisibleItemPosition();
        int count = mRecyclerView.getAdapter().getItemCount();
        if (0 == count) {
            // 没有item的时候也可以上拉加载
            return true;
        } else if (mLastVisiblePosition == (count - 1)) {
            // 滑到底部了
            if (lm.findViewByPosition(count - 1).getBottom() <= getMeasuredHeight()) {
                return true;
            }
        }
        return false;
    }



    /**
     * 获取底部可见项的位置
     *
     * @return
     */
    private int getLastVisibleItemPosition() {
        RecyclerView.LayoutManager lm = mRecyclerView.getLayoutManager();
        int lastVisibleItemPosition = 0;
        if (lm instanceof GridLayoutManager) {
            lastVisibleItemPosition = ((GridLayoutManager) lm).findLastVisibleItemPosition();
        } else if (lm instanceof LinearLayoutManager) {
            lastVisibleItemPosition = ((LinearLayoutManager) lm).findLastVisibleItemPosition();
        }
        return lastVisibleItemPosition;
    }


    /**
     * 创建刷新View和初始化一些数据
     */
    private void createProgressView() {
        mImageView = new ImageView(getContext());

        int size = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, PULL_IMAGE_SIZE, getContext().getResources().getDisplayMetrics());
        PULL_IMAGE_SIZE_PX = size;
        PULL_IMAGE_SIZE_PX_MAX = PULL_IMAGE_SIZE_PX * 2;
        PULL_IMAGE_SIZE_PX_EXECUTE = PULL_IMAGE_SIZE_PX;
        PULL_IMAGE_SIZE_PX_EXECUTE_REFRESH = PULL_IMAGE_SIZE_PX / 3 * 2;
        ROTATE_ANIM_ANGLE_PER = (360.0f / PULL_IMAGE_SIZE_PX_MAX);
        LayoutParams lp = new LayoutParams(size, size);
        lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
        lp.addRule(RelativeLayout.CENTER_HORIZONTAL);
        lp.setMargins(lp.leftMargin, lp.topMargin, lp.rightMargin, -PULL_IMAGE_SIZE_PX);
        mImageView.setLayoutParams(lp);
        mImageView.setBackground(getShapeDrawable());

        addView(mImageView);
        mImageView.setVisibility(View.GONE);

        mProgress = new MaterialProgressDrawable(getContext(), mImageView);

        mProgress.setBackgroundColor(CIRCLE_BG_LIGHT);
        //圈圈颜色,可以是多种颜色
        mProgress.setColorSchemeColors(colors);
        //设置圈圈的各种大小
        mProgress.updateSizes(MaterialProgressDrawable.LARGE);

        mImageView.setImageDrawable(mProgress);
    }

    /**
     * mImageView的背景
     */
    private Drawable getShapeDrawable() {
        /**
         * <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
         <!-- 第一层  上部和左部偏移一定距离-->
         <item
         >
         <shape android:shape="oval">
         <solid android:color="#f5f5f5" />
         <!-- 描边 -->
         <stroke
         android:width="0.5dp"
         android:color="#99f5f5f5" />
         </shape>
         </item>
         <!-- 第二层 下部和有部偏移一定距离-->
         <item
         android:left="2dp"
         android:top="2dp"
         android:bottom="2dp"
         android:right="2dp">
         <shape android:shape="oval">
         <solid android:color="#ffffff" />
         <!-- 描边 -->
         <!--<stroke android:width="0.33dp" android:color="#dedede" />-->
         </shape>
         </item>
         </layer-list>
         */
        //代码实现
        GradientDrawable gradientDrawable = new GradientDrawable();
        gradientDrawable.setShape(GradientDrawable.OVAL);
        gradientDrawable.setColor(Color.parseColor("#f5f5f5"));
        int stroke = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 0.5f, getContext().getResources().getDisplayMetrics());
        gradientDrawable.setStroke(stroke,Color.parseColor("#99f5f5f5"));
        GradientDrawable gradientDrawable2 = new GradientDrawable();
        gradientDrawable2.setShape(GradientDrawable.OVAL);
        gradientDrawable2.setColor(Color.parseColor("#ffffff"));
        LayerDrawable drawable = new LayerDrawable(new Drawable[]{gradientDrawable,gradientDrawable2});
        int padding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2, getContext().getResources().getDisplayMetrics());
        drawable.setLayerInset(1,padding,padding,padding,padding);////第一个参数1代表数组的第二个元素，为白色
        return drawable;
    }

    /**
     * 隐藏箭头
     */
    private void hide() {
        if (mValueAnimator != null) {
            mValueAnimator.cancel();
            mVisable = false;
            mVisibleCanScoll = false;
        }

    }

    private void visable() {
        if (mValueAnimator == null) {
            mValueAnimator = mValueAnimator.ofFloat(0f, 1f);
            mValueAnimator.setDuration(10);
            mValueAnimator.setInterpolator(new DecelerateInterpolator());
            mValueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
                @Override
                public void onAnimationUpdate(ValueAnimator animation) {
                    float n = (float) animation.getAnimatedValue();
                    //圈圈的旋转角度
                    mProgress.setProgressRotation(n * 0.5f);
                    //圈圈周长，0f-1F
                    mProgress.setStartEndTrim(0f, n * 0.8f);
                    //箭头大小，0f-1F
                    mProgress.setArrowScale(n);
                    //透明度，0-255
                    mProgress.setAlpha((int) (255 * n));
                }
            });
            mValueAnimator.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    super.onAnimationEnd(animation);
                    mVisable = true;

                }
            });
        }

        if (!mValueAnimator.isRunning()) {
            if (!mVisable) {
                //是否显示箭头
                mProgress.showArrow(true);
                mValueAnimator.start();
                mVisibleCanScoll = true;
            }
        }
    }

    private void start() {
        if (mVisable) {
            if (!mStart) {
                mProgress.start();

                mStart = true;

            }
        }
    }

    /**
     * 计算执行动画的距离参数
     */
    private void getValueToTranslation() {
        //如果mImageView还没有被创建出来是不会执行的
        if(mImageView != null) {
            LayoutParams lp = (LayoutParams) mImageView.getLayoutParams();
            int bottomMargin = lp.bottomMargin;
            //执行平移
            translationTo(bottomMargin, PULL_IMAGE_SIZE_PX_EXECUTE_REFRESH, true);
        }
    }

    private void stop() {
        if (mStart) {
            mProgress.stop();
            mStart = false;
            mVisable = false;
            mVisibleCanScoll = false;
        }
    }


    /**
     * 执行平移动画
     * @param from
     * @param to
     */
    private void translationTo(int from,int to,final boolean isShow){
        //1.调用ofInt(int...values)方法创建ValueAnimator对象
        ValueAnimator mAnimator = ValueAnimator.ofInt(from,to);
        //2.为目标对象的属性变化设置监听器
        mAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {

            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                // 3.为目标对象的属性设置计算好的属性值
                int animatorValue = http://www.mamicode.com/(int)animation.getAnimatedValue();
                MarginLayoutParams marginLayoutParams = (MarginLayoutParams) mImageView.getLayoutParams();
                marginLayoutParams.bottomMargin = animatorValue;
                mImageView.setLayoutParams(marginLayoutParams);
            }
        });
        mAnimator.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                if(isShow){
                    start();
                    mPrepareAnimation = false;
                }else{
                    hideRefreshArrow();
                    hide();
                }

            }
        });
        //4.设置动画的持续时间、是否重复及重复次数等属性
        mAnimator.setDuration(100);
        //mAnimator.setRepeatCount(3);
        mAnimator.setRepeatMode(ValueAnimator.INFINITE);
        //5.为ValueAnimator设置目标对象并开始执行动画
        mAnimator.setTarget(mImageView);
        mAnimator.start();
    }

    /**
     * 旋转动画效果
     */
    private void rotateAniamtor(float from){

        ObjectAnimator mAnimatorRotate = ObjectAnimator.ofFloat(mImageView, "rotation",from,from + 1);
        mAnimatorRotate.setRepeatMode(Animation.INFINITE);
        mAnimatorRotate.setRepeatCount(1);
        mAnimatorRotate.setDuration(10);
        mAnimatorRotate.start();
    }


    /**
     * 加载更多或停止加载更多
     * @param refreshing
     */
    public void setRefreshing(boolean refreshing) {
        if(!mIsAllowLoadMore) return;
        if(refreshing){
            if(mStart) return;
            showRefreshArrow();
            getValueToTranslation();
            mPrepareAnimation = true;

            if (mOnPullListener != null) {
                mOnPullListener.onLoadMore(this);
            }
            mIsCanScoll = false;
        }else {
            stop();
            hideArrow();
        }
    }

    /**
     * 当前是否在上拉刷新
     * @return
     */
    public boolean isRefreshing(){
        return mStart;
    }


    /**
     * 刷新加载回调接口
     *
     * @author chenjing
     */
    public interface OnPullListener {

        /**
         * 加载操作
         */
        void onl oadMore(PullRefreshLayout pullRefreshLayout);
    }

    private OnPullListener mOnPullListener;

    public void setOnPullListener(OnPullListener listener) {
        mOnPullListener = listener;
    }

}

MaterialProgressDrawable

package com.linzhou.recyclerviewfresh.refresh;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Animatable;
import android.graphics.drawable.Drawable;
import android.support.annotation.IntDef;
import android.support.annotation.NonNull;
import android.support.v4.view.animation.FastOutSlowInInterpolator;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.view.animation.Transformation;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
/**
 * Created by joe on 2016/10/23.
 */
public class MaterialProgressDrawable extends Drawable implements Animatable {
    private static final Interpolator LINEAR_INTERPOLATOR = new LinearInterpolator();
    private static final Interpolator MATERIAL_INTERPOLATOR = new FastOutSlowInInterpolator();

    private static final float FULL_ROTATION = 1080.0f;
    @Retention(RetentionPolicy.CLASS)
    @IntDef({LARGE, DEFAULT})
    public @interface ProgressDrawableSize {}
    // Maps to ProgressBar.Large style
    public static final int LARGE = 0;
    // Maps to ProgressBar default style
    public static final int DEFAULT = 1;

    // Maps to ProgressBar default style
    private static final int CIRCLE_DIAMETER = 40;
    private static final float CENTER_RADIUS = 8.75f; //should add up to 10 when + stroke_width
    private static final float STROKE_WIDTH = 2.5f;

    // Maps to ProgressBar.Large style
    private static final int CIRCLE_DIAMETER_LARGE = 56;
    private static final float CENTER_RADIUS_LARGE = 12.5f;
    private static final float STROKE_WIDTH_LARGE = 3f;

    private final int[] COLORS = new int[] {
            Color.BLACK
    };

    /**
     * The value in the linear interpolator for animating the drawable at which
     * the color transition should start
     */
    private static final float COLOR_START_DELAY_OFFSET = 0.75f;
    private static final float END_TRIM_START_DELAY_OFFSET = 0.5f;
    private static final float START_TRIM_DURATION_OFFSET = 0.5f;

    /** The duration of a single progress spin in milliseconds. */
    private static final int ANIMATION_DURATION = 1332;

    /** The number of points in the progress "star". */
    private static final float NUM_POINTS = 5f;
    /** The list of animators operating on this drawable. */
    private final ArrayList<Animation> mAnimators = new ArrayList<>();

    /** The indicator ring, used to manage animation state. */
    private final Ring mRing;

    /** Canvas rotation in degrees. */
    private float mRotation;

    /** Layout info for the arrowhead in dp */
    private static final int ARROW_WIDTH = 10;
    private static final int ARROW_HEIGHT = 5;
    private static final float ARROW_OFFSET_ANGLE = 5;

    /** Layout info for the arrowhead for the large spinner in dp */
    private static final int ARROW_WIDTH_LARGE = 12;
    private static final int ARROW_HEIGHT_LARGE = 6;
    private static final float MAX_PROGRESS_ARC = .8f;

    private Resources mResources;
    private View mParent;
    private Animation mAnimation;
    private float mRotationCount;
    private double mWidth;
    private double mHeight;
    boolean mFinishing;

    public MaterialProgressDrawable(Context context, View parent) {
        mParent = parent;
        mResources = context.getResources();

        mRing = new Ring(mCallback);
        mRing.setColors(COLORS);

        updateSizes(DEFAULT);
        setupAnimators();
    }

    private void setSizeParameters(double progressCircleWidth, double progressCircleHeight,
                                   double centerRadius, double strokeWidth, float arrowWidth, float arrowHeight) {
        final Ring ring = mRing;
        final DisplayMetrics metrics = mResources.getDisplayMetrics();
        final float screenDensity = metrics.density;

        mWidth = progressCircleWidth * screenDensity;
        mHeight = progressCircleHeight * screenDensity;
        ring.setStrokeWidth((float) strokeWidth * screenDensity);
        ring.setCenterRadius(centerRadius * screenDensity);
        ring.setColorIndex(0);
        ring.setArrowDimensions(arrowWidth * screenDensity, arrowHeight * screenDensity);
        ring.setInsets((int) mWidth, (int) mHeight);
    }


    public void updateSizes(@ProgressDrawableSize int size) {
        if (size == LARGE) {
            setSizeParameters(CIRCLE_DIAMETER_LARGE, CIRCLE_DIAMETER_LARGE, CENTER_RADIUS_LARGE,
                    STROKE_WIDTH_LARGE, ARROW_WIDTH_LARGE, ARROW_HEIGHT_LARGE);
        } else {
            setSizeParameters(CIRCLE_DIAMETER, CIRCLE_DIAMETER, CENTER_RADIUS, STROKE_WIDTH,
                    ARROW_WIDTH, ARROW_HEIGHT);
        }
    }

    /**
     * @param show Set to true to display the arrowhead on the progress spinner.
     */
    public void showArrow(boolean show) {
        mRing.setShowArrow(show);
    }

    /**
     * @param scale Set the scale of the arrowhead for the spinner.
     */
    public void setArrowScale(float scale) {
        mRing.setArrowScale(scale);
    }

    /**
     * Set the start and end trim for the progress spinner arc.
     *
     * @param startAngle start angle
     * @param endAngle end angle
     */
    public void setStartEndTrim(float startAngle, float endAngle) {
        mRing.setStartTrim(startAngle);
        mRing.setEndTrim(endAngle);
    }

    /**
     * Set the amount of rotation to apply to the progress spinner.
     *
     * @param rotation Rotation is from [0..1]
     */
    public void setProgressRotation(float rotation) {
        mRing.setRotation(rotation);
    }

    /**
     * Update the background color of the circle image view.
     */
    public void setBackgroundColor(int color) {
        mRing.setBackgroundColor(color);
    }

    /**
     * Set the colors used in the progress animation from color resources.
     * The first color will also be the color of the bar that grows in response
     * to a user swipe gesture.
     *
     * @param colors
     */
    public void setColorSchemeColors(int... colors) {
        mRing.setColors(colors);
        mRing.setColorIndex(0);
    }

    @Override
    public int getIntrinsicHeight() {
        return (int) mHeight;
    }

    @Override
    public int getIntrinsicWidth() {
        return (int) mWidth;
    }

    @Override
    public void draw(Canvas c) {
        final Rect bounds = getBounds();
        final int saveCount = c.save();
        c.rotate(mRotation, bounds.exactCenterX(), bounds.exactCenterY());
        mRing.draw(c, bounds);
        c.restoreToCount(saveCount);
    }

    @Override
    public void setAlpha(int alpha) {
        mRing.setAlpha(alpha);
    }

    public int getAlpha() {
        return mRing.getAlpha();
    }

    @Override
    public void setColorFilter(ColorFilter colorFilter) {
        mRing.setColorFilter(colorFilter);
    }

    @SuppressWarnings("unused")
    void setRotation(float rotation) {
        mRotation = rotation;
        invalidateSelf();
    }

    @SuppressWarnings("unused")
    private float getRotation() {
        return mRotation;
    }

    @Override
    public int getOpacity() {
        return PixelFormat.TRANSLUCENT;
    }

    @Override
    public boolean isRunning() {
        final ArrayList<Animation> animators = mAnimators;
        final int N = animators.size();
        for (int i = 0; i < N; i++) {
            final Animation animator = animators.get(i);
            if (animator.hasStarted() && !animator.hasEnded()) {
                return true;
            }
        }
        return false;
    }

    @Override
    public void start() {
        mAnimation.reset();
        mRing.storeOriginals();
        // Already showing some part of the ring
        if (mRing.getEndTrim() != mRing.getStartTrim()) {
            mFinishing = true;
            mAnimation.setDuration(ANIMATION_DURATION/2);
            mParent.startAnimation(mAnimation);
        } else {
            mRing.setColorIndex(0);
            mRing.resetOriginals();
            mAnimation.setDuration(ANIMATION_DURATION);
            mParent.startAnimation(mAnimation);
        }
    }

    @Override
    public void stop() {
        mParent.clearAnimation();
        setRotation(0);
        mRing.setShowArrow(false);
        mRing.setColorIndex(0);
        mRing.resetOriginals();
    }

    private float getMinProgressArc(Ring ring) {
        return (float) Math.toRadians(
                ring.getStrokeWidth() / (2 * Math.PI * ring.getCenterRadius()));
    }

    // Adapted from ArgbEvaluator.java
    private int evaluateColorChange(float fraction, int startValue, int endValue) {
        int startInt = (Integer) startValue;
        int startA = (startInt >> 24) & 0xff;
        int startR = (startInt >> 16) & 0xff;
        int startG = (startInt >> 8) & 0xff;
        int startB = startInt & 0xff;

        int endInt = (Integer) endValue;
        int endA = (endInt >> 24) & 0xff;
        int endR = (endInt >> 16) & 0xff;
        int endG = (endInt >> 8) & 0xff;
        int endB = endInt & 0xff;

        return (int)((startA + (int)(fraction * (endA - startA))) << 24) |
                (int)((startR + (int)(fraction * (endR - startR))) << 16) |
                (int)((startG + (int)(fraction * (endG - startG))) << 8) |
                (int)((startB + (int)(fraction * (endB - startB))));
    }

    /**
     * Update the ring color if this is within the last 25% of the animation.
     * The new ring color will be a translation from the starting ring color to
     * the next color.
     */
    private void updateRingColor(float interpolatedTime, Ring ring) {
        if (interpolatedTime > COLOR_START_DELAY_OFFSET) {
            // scale the interpolatedTime so that the full
            // transformation from 0 - 1 takes place in the
            // remaining time
            ring.setColor(evaluateColorChange((interpolatedTime - COLOR_START_DELAY_OFFSET)
                            / (1.0f - COLOR_START_DELAY_OFFSET), ring.getStartingColor(),
                    ring.getNextColor()));
        }
    }

    private void applyFinishTranslation(float interpolatedTime, Ring ring) {
        // shrink back down and complete a full rotation before
        // starting other circles
        // Rotation goes between [0..1].
        updateRingColor(interpolatedTime, ring);
        float targetRotation = (float) (Math.floor(ring.getStartingRotation() / MAX_PROGRESS_ARC)
                + 1f);
        final float minProgressArc = getMinProgressArc(ring);
        final float startTrim = ring.getStartingStartTrim()
                + (ring.getStartingEndTrim() - minProgressArc - ring.getStartingStartTrim())
                * interpolatedTime;
        ring.setStartTrim(startTrim);
        ring.setEndTrim(ring.getStartingEndTrim());
        final float rotation = ring.getStartingRotation()
                + ((targetRotation - ring.getStartingRotation()) * interpolatedTime);
        ring.setRotation(rotation);
    }

    private void setupAnimators() {
        final Ring ring = mRing;
        final Animation animation = new Animation() {
            @Override
            public void applyTransformation(float interpolatedTime, Transformation t) {
                if (mFinishing) {
                    applyFinishTranslation(interpolatedTime, ring);
                } else {
                    // The minProgressArc is calculated from 0 to create an
                    // angle that matches the stroke width.
                    final float minProgressArc = getMinProgressArc(ring);
                    final float startingEndTrim = ring.getStartingEndTrim();
                    final float startingTrim = ring.getStartingStartTrim();
                    final float startingRotation = ring.getStartingRotation();

                    updateRingColor(interpolatedTime, ring);

                    // Moving the start trim only occurs in the first 50% of a
                    // single ring animation
                    if (interpolatedTime <= START_TRIM_DURATION_OFFSET) {
                        // scale the interpolatedTime so that the full
                        // transformation from 0 - 1 takes place in the
                        // remaining time
                        final float scaledTime = (interpolatedTime)
                                / (1.0f - START_TRIM_DURATION_OFFSET);
                        final float startTrim = startingTrim
                                + ((MAX_PROGRESS_ARC - minProgressArc) * MATERIAL_INTERPOLATOR
                                .getInterpolation(scaledTime));
                        ring.setStartTrim(startTrim);
                    }

                    // Moving the end trim starts after 50% of a single ring
                    // animation completes
                    if (interpolatedTime > END_TRIM_START_DELAY_OFFSET) {
                        // scale the interpolatedTime so that the full
                        // transformation from 0 - 1 takes place in the
                        // remaining time
                        final float minArc = MAX_PROGRESS_ARC - minProgressArc;
                        float scaledTime = (interpolatedTime - START_TRIM_DURATION_OFFSET)
                                / (1.0f - START_TRIM_DURATION_OFFSET);
                        final float endTrim = startingEndTrim
                                + (minArc * MATERIAL_INTERPOLATOR.getInterpolation(scaledTime));
                        ring.setEndTrim(endTrim);
                    }

                    final float rotation = startingRotation + (0.25f * interpolatedTime);
                    ring.setRotation(rotation);

                    float groupRotation = ((FULL_ROTATION / NUM_POINTS) * interpolatedTime)
                            + (FULL_ROTATION * (mRotationCount / NUM_POINTS));
                    setRotation(groupRotation);
                }
            }
        };
        animation.setRepeatCount(Animation.INFINITE);
        animation.setRepeatMode(Animation.RESTART);
        animation.setInterpolator(LINEAR_INTERPOLATOR);
        animation.setAnimationListener(new Animation.AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
                mRotationCount = 0;
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                // do nothing
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
                ring.storeOriginals();
                ring.goToNextColor();
                ring.setStartTrim(ring.getEndTrim());
                if (mFinishing) {
                    // finished closing the last ring from the swipe gesture; go
                    // into progress mode
                    mFinishing = false;
                    animation.setDuration(ANIMATION_DURATION);
                    ring.setShowArrow(false);
                } else {
                    mRotationCount = (mRotationCount + 1) % (NUM_POINTS);
                }
            }
        });
        mAnimation = animation;
    }

    private final Callback mCallback = new Callback() {
        @Override
        public void invalidateDrawable(Drawable d) {
            invalidateSelf();
        }

        @Override
        public void scheduleDrawable(Drawable d, Runnable what, long when) {
            scheduleSelf(what, when);
        }

        @Override
        public void unscheduleDrawable(Drawable d, Runnable what) {
            unscheduleSelf(what);
        }
    };

    private static class Ring {
        private final RectF mTempBounds = new RectF();
        private final Paint mPaint = new Paint();
        private final Paint mArrowPaint = new Paint();

        private final Callback mCallback;

        private float mStartTrim = 0.0f;
        private float mEndTrim = 0.0f;
        private float mRotation = 0.0f;
        private float mStrokeWidth = 5.0f;
        private float mStrokeInset = 2.5f;

        private int[] mColors;
        // mColorIndex represents the offset into the available mColors that the
        // progress circle should currently display. As the progress circle is
        // animating, the mColorIndex moves by one to the next available color.
        private int mColorIndex;
        private float mStartingStartTrim;
        private float mStartingEndTrim;
        private float mStartingRotation;
        private boolean mShowArrow;
        private Path mArrow;
        private float mArrowScale;
        private double mRingCenterRadius;
        private int mArrowWidth;
        private int mArrowHeight;
        private int mAlpha;
        private final Paint mCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        private int mBackgroundColor;
        private int mCurrentColor;

        public Ring(Callback callback) {
            mCallback = callback;

            mPaint.setStrokeCap(Paint.Cap.SQUARE);
            mPaint.setAntiAlias(true);
            mPaint.setStyle(Paint.Style.STROKE);

            mArrowPaint.setStyle(Paint.Style.FILL);
            mArrowPaint.setAntiAlias(true);
        }

        public void setBackgroundColor(int color) {
            mBackgroundColor = color;
        }

        /**
         * Set the dimensions of the arrowhead.
         *
         * @param width Width of the hypotenuse of the arrow head
         * @param height Height of the arrow point
         */
        public void setArrowDimensions(float width, float height) {
            mArrowWidth = (int) width;
            mArrowHeight = (int) height;
        }

        /**
         * Draw the progress spinner
         */
        public void draw(Canvas c, Rect bounds) {
            final RectF arcBounds = mTempBounds;
            arcBounds.set(bounds);
            arcBounds.inset(mStrokeInset, mStrokeInset);

            final float startAngle = (mStartTrim + mRotation) * 360;
            final float endAngle = (mEndTrim + mRotation) * 360;
            float sweepAngle = endAngle - startAngle;

            mPaint.setColor(mCurrentColor);
            c.drawArc(arcBounds, startAngle, sweepAngle, false, mPaint);

            drawTriangle(c, startAngle, sweepAngle, bounds);

            if (mAlpha < 255) {
                mCirclePaint.setColor(mBackgroundColor);
                mCirclePaint.setAlpha(255 - mAlpha);
                c.drawCircle(bounds.exactCenterX(), bounds.exactCenterY(), bounds.width() / 2,
                        mCirclePaint);
            }
        }

        private void drawTriangle(Canvas c, float startAngle, float sweepAngle, Rect bounds) {
            if (mShowArrow) {
                if (mArrow == null) {
                    mArrow = new Path();
                    mArrow.setFillType(Path.FillType.EVEN_ODD);
                } else {
                    mArrow.reset();
                }

                // Adjust the position of the triangle so that it is inset as
                // much as the arc, but also centered on the arc.
                float inset = (int) mStrokeInset / 2 * mArrowScale;
                float x = (float) (mRingCenterRadius * Math.cos(0) + bounds.exactCenterX());
                float y = (float) (mRingCenterRadius * Math.sin(0) + bounds.exactCenterY());

                // Update the path each time. This works around an issue in SKIA
                // where concatenating a rotation matrix to a scale matrix
                // ignored a starting negative rotation. This appears to have
                // been fixed as of API 21.
                mArrow.moveTo(0, 0);
                mArrow.lineTo(mArrowWidth * mArrowScale, 0);
                mArrow.lineTo((mArrowWidth * mArrowScale / 2), (mArrowHeight
                        * mArrowScale));
                mArrow.offset(x - inset, y);
                mArrow.close();
                // draw a triangle
                mArrowPaint.setColor(mCurrentColor);
                c.rotate(startAngle + sweepAngle - ARROW_OFFSET_ANGLE, bounds.exactCenterX(),
                        bounds.exactCenterY());
                c.drawPath(mArrow, mArrowPaint);
            }
        }

        /**
         * Set the colors the progress spinner alternates between.
         *
         * @param colors Array of integers describing the colors. Must be non-<code>null</code>.
         */
        public void setColors(@NonNull int[] colors) {
            mColors = colors;
            // if colors are reset, make sure to reset the color index as well
            setColorIndex(0);
        }

        /**
         * Set the absolute color of the progress spinner. This is should only
         * be used when animating between current and next color when the
         * spinner is rotating.
         *
         * @param color int describing the color.
         */
        public void setColor(int color) {
            mCurrentColor = color;
        }

        /**
         * @param index Index into the color array of the color to display in
         *            the progress spinner.
         */
        public void setColorIndex(int index) {
            mColorIndex = index;
            mCurrentColor = mColors[mColorIndex];
        }

        /**
         * @return int describing the next color the progress spinner should use when drawing.
         */
        public int getNextColor() {
            return mColors[getNextColorIndex()];
        }

        private int getNextColorIndex() {
            return (mColorIndex + 1) % (mColors.length);
        }

        /**
         * Proceed to the next available ring color. This will automatically
         * wrap back to the beginning of colors.
         */
        public void goToNextColor() {
            setColorIndex(getNextColorIndex());
        }

        public void setColorFilter(ColorFilter filter) {
            mPaint.setColorFilter(filter);
            invalidateSelf();
        }

        /**
         * @param alpha Set the alpha of the progress spinner and associated arrowhead.
         */
        public void setAlpha(int alpha) {
            mAlpha = alpha;
        }

        /**
         * @return Current alpha of the progress spinner and arrowhead.
         */
        public int getAlpha() {
            return mAlpha;
        }

        /**
         * @param strokeWidth Set the stroke width of the progress spinner in pixels.
         */
        public void setStrokeWidth(float strokeWidth) {
            mStrokeWidth = strokeWidth;
            mPaint.setStrokeWidth(strokeWidth);
            invalidateSelf();
        }

        @SuppressWarnings("unused")
        public float getStrokeWidth() {
            return mStrokeWidth;
        }

        @SuppressWarnings("unused")
        public void setStartTrim(float startTrim) {
            mStartTrim = startTrim;
            invalidateSelf();
        }

        @SuppressWarnings("unused")
        public float getStartTrim() {
            return mStartTrim;
        }

        public float getStartingStartTrim() {
            return mStartingStartTrim;
        }

        public float getStartingEndTrim() {
            return mStartingEndTrim;
        }

        public int getStartingColor() {
            return mColors[mColorIndex];
        }

        @SuppressWarnings("unused")
        public void setEndTrim(float endTrim) {
            mEndTrim = endTrim;
            invalidateSelf();
        }

        @SuppressWarnings("unused")
        public float getEndTrim() {
            return mEndTrim;
        }

        @SuppressWarnings("unused")
        public void setRotation(float rotation) {
            mRotation = rotation;
            invalidateSelf();
        }

        @SuppressWarnings("unused")
        public float getRotation() {
            return mRotation;
        }

        public void setInsets(int width, int height) {
            final float minEdge = (float) Math.min(width, height);
            float insets;
            if (mRingCenterRadius <= 0 || minEdge < 0) {
                insets = (float) Math.ceil(mStrokeWidth / 2.0f);
            } else {
                insets = (float) (minEdge / 2.0f - mRingCenterRadius);
            }
            mStrokeInset = insets;
        }

        @SuppressWarnings("unused")
        public float getInsets() {
            return mStrokeInset;
        }

        /**
         * @param centerRadius Inner radius in px of the circle the progress
         *            spinner arc traces.
         */
        public void setCenterRadius(double centerRadius) {
            mRingCenterRadius = centerRadius;
        }

        public double getCenterRadius() {
            return mRingCenterRadius;
        }

        /**
         * @param show Set to true to show the arrow head on the progress spinner.
         */
        public void setShowArrow(boolean show) {
            if (mShowArrow != show) {
                mShowArrow = show;
                invalidateSelf();
            }
        }

        /**
         * @param scale Set the scale of the arrowhead for the spinner.
         */
        public void setArrowScale(float scale) {
            if (scale != mArrowScale) {
                mArrowScale = scale;
                invalidateSelf();
            }
        }

        /**
         * @return The amount the progress spinner is currently rotated, between [0..1].
         */
        public float getStartingRotation() {
            return mStartingRotation;
        }

        /**
         * If the start / end trim are offset to begin with, store them so that
         * animation starts from that offset.
         */
        public void storeOriginals() {
            mStartingStartTrim = mStartTrim;
            mStartingEndTrim = mEndTrim;
            mStartingRotation = mRotation;
        }

        /**
         * Reset the progress spinner to default rotation, start and end angles.
         */
        public void resetOriginals() {
            mStartingStartTrim = 0;
            mStartingEndTrim = 0;
            mStartingRotation = 0;
            setStartTrim(0);
            setEndTrim(0);
            setRotation(0);
        }

        private void invalidateSelf() {
            mCallback.invalidateDrawable(null);
        }
    }
}

DividerItemDecoration

package com.linzhou.recyclerviewfresh.refresh;

/**
 * Created by joe on 2016/10/23.
 */
/*
 * 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.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);
            RecyclerView v = new 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);
        }
    }
}

DividerGridItemDecoration

package com.linzhou.recyclerviewfresh.refresh;

/**
 * Created by joe on 2016/10/23.
 */
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());
        }
    }
}

CommonAdapter

package com.linzhou.recyclerviewfresh.adapter;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.ViewGroup;

import java.util.List;

/**
 * Created by joe on 2016/10/23.
 */
public abstract class CommonAdapter<T> extends RecyclerView.Adapter<ViewHolder> {

    protected Context mContext;
    protected int mLayoutId;
    protected List<T> mDatas;
    protected LayoutInflater mLayoutInflater;

    public CommonAdapter(Context context,int layoutId,List<T> datas){
        this.mContext = context;
        this.mLayoutId = layoutId;
        this.mDatas = datas;
        mLayoutInflater = LayoutInflater.from(context);
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        ViewHolder viewHolder = ViewHolder.get(mContext, parent, mLayoutId);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        //暴露接口，使用viewHoler.getView(viewId)获取对应的控件，并且设置相应的数据
        convert(holder,mDatas.get(position),position);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position, List<Object> payloads) {
        super.onBindViewHolder(holder, position, payloads);
    }

    public abstract void convert(ViewHolder viewHolder, T item, int position);

    @Override
    public int getItemCount() {
        return mDatas == null ? 0 : mDatas.size();
    }
}

MultiItemCommonAdapter

package com.linzhou.recyclerviewfresh.adapter;

import android.content.Context;
import android.view.ViewGroup;

import java.util.List;

/**
 * Created by joe on 2016/10/23.
 */
public abstract class MultiItemCommonAdapter<T> extends CommonAdapter<T> {

    private MultiItemTypeSupport mMultiItemTypeSupport;

    public MultiItemCommonAdapter(Context context, List<T> datas ,MultiItemTypeSupport multiItemTypeSupport) {
        //layoutId是在onCreateViewHolder中加载布局的，因为这里还要重写该方法，所以不需要传layoutId
        super(context, -1, datas);
        this.mMultiItemTypeSupport = multiItemTypeSupport;
    }

    @Override
    public int getItemViewType(int position) {
        //根据position和java bean对象中的某个字段值就可以该条目是什么类型的了
        //类型可以从0开始，依次往上加，每个数字对应一种类型
        return mMultiItemTypeSupport.getItemViewType(position,mDatas.get(position));
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        //通过viewType获取不同条目的布局id
        int itemLayoutId = mMultiItemTypeSupport.getItemLayoutId(viewType);
        //通过布局id去创建ViewHolder
        ViewHolder viewHolder = ViewHolder.get(mContext, parent, itemLayoutId);

        return viewHolder;
    }

}

MultiItemTypeSupport

package com.linzhou.recyclerviewfresh.adapter;

/**
 * Created by joe on 2016/10/23.
 */
public interface MultiItemTypeSupport<T> {
    int getItemViewType(int position, T item);//通过position来返回条目的类型
    int getItemLayoutId(int itemType);//根据要显示的条目类型，去返回相应的布局id
}

ViewHolder

package com.linzhou.recyclerviewfresh.adapter;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 * Created by joe on 2016/10/23.
 */
public class ViewHolder extends RecyclerView.ViewHolder {


    private Context mContext;
    private View mConvertView;//条目布局
    private SparseArray<View> mViews;//保存条目布局中的所有控件（一个ViewHolder对象对应一个条目布局）

    public ViewHolder(Context context , View itemView, ViewGroup viewGroup) {
        super(itemView);
        this.mContext = context;
        this.mConvertView = itemView;
        mViews = new SparseArray<View>();
    }

    /**
     * 得到ViewHolder对象
     * @param context
     * @param parent
     * @param layoutId 条目布局的资源id
     * @return
     */
    public static ViewHolder get(Context context ,ViewGroup parent,int layoutId){
        View itemView = LayoutInflater.from(context).inflate(layoutId, parent, false);
        ViewHolder viewHolder = new ViewHolder(context,itemView,parent);
        return viewHolder;
    }

    /**
     * 根据控件id获取条目布局(ViewHolder)中的控件
     * @param viewId 控件id
     * @param <T>
     * @return
     */
    public <T extends View> T getView(int viewId){
        View view = mViews.get(viewId);
        if(view == null){
            view = mConvertView.findViewById(viewId);
            mViews.put(viewId,view);
        }
        return (T)view;
    }

    /**
     * 给TextView设置文本
     * @param viewId TextView的id
     * @param text 显示的文本
     * @return
     */
    public ViewHolder setText(int viewId,String text){
        TextView textView = getView(viewId);
        textView.setText(text);
        return this;
    }


}

MainActivity

package com.linzhou.recyclerviewfresh.activity;
import android.content.Context;
import android.graphics.Color;
import android.os.SystemClock;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import com.linzhou.recyclerviewfresh.R;
import com.linzhou.recyclerviewfresh.adapter.CommonAdapter;
import com.linzhou.recyclerviewfresh.adapter.ViewHolder;
import com.linzhou.recyclerviewfresh.refresh.DividerItemDecoration;
import com.linzhou.recyclerviewfresh.refresh.PullRefreshLayout;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRecycler;
    private SwipeRefreshLayout mSwipe;
    private PullRefreshLayout mPull;
    private ArrayList<String> mDatas;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mRecycler = (RecyclerView) findViewById(R.id.recycler);
        mSwipe = (SwipeRefreshLayout) findViewById(R.id.swipe);
        mPull = (PullRefreshLayout) findViewById(R.id.pull);

        findViewById(R.id.btn).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mPull.setAllowLoadMore(!mPull.isAllowLoadMore());
            }
        });

        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        mRecycler.setLayoutManager(layoutManager);

        mRecycler.addItemDecoration(new DividerItemDecoration(this,LinearLayoutManager.VERTICAL));

        mPull.setColorSchemeColors(Color.BLACK,Color.CYAN,Color.YELLOW);

        mDatas = new ArrayList<>();
        for(int i=0;i<220;i++){
            mDatas.add(i+"");
        }

        final MyAdapter adapter = new MyAdapter(this,R.layout.recyclercview_item,mDatas);
        mRecycler.setAdapter(adapter);

        mSwipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        SystemClock.sleep(2000);
                        mDatas.clear();
                        for(int i=0;i<220;i++){
                            mDatas.add(i+"");
                        }
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                adapter.notifyDataSetChanged();
                                mSwipe.setRefreshing(false);
                            }
                        });
                    }
                }).start();
            }
        });

        mPull.setOnPullListener(new PullRefreshLayout.OnPullListener() {
            @Override
            public void onLoadMore(final PullRefreshLayout pullRefreshLayout) {

                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        SystemClock.sleep(2000);
                        for (int i = 0; i < 10; i++) {
                            mDatas.add(mDatas.size() + "");
                        }
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                adapter.notifyDataSetChanged();
                                pullRefreshLayout.setRefreshing(false);
                            }
                        });
                    }
                }).start();
            }
        });
    }

    class MyAdapter extends CommonAdapter<String> {

        public MyAdapter(Context context, int layoutId, List<String> datas) {
            super(context, layoutId, datas);
        }

        @Override
        public void convert(ViewHolder viewHolder, String item, int position) {
            viewHolder.setText(R.id.recyclerView_tv,item);

        }
    }
}

recyclercview_item

<?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="wrap_content"
    android:orientation="vertical"
    >
    <TextView
        android:id="@+id/recyclerView_tv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        />
</LinearLayout>

activity_main

<?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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.linzhou.recyclerviewfresh.activity.MainActivity">
    <com.linzhou.recyclerviewfresh.refresh.PullRefreshLayout
        android:id="@+id/pull"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <android.support.v4.widget.SwipeRefreshLayout
            android:id="@+id/swipe"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
            <android.support.v7.widget.RecyclerView
                android:id="@+id/recycler"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:cacheColorHint="@null"
                android:scrollbars="vertical"></android.support.v7.widget.RecyclerView>
        </android.support.v4.widget.SwipeRefreshLayout>
    </com.linzhou.recyclerviewfresh.refresh.PullRefreshLayout>

    <Button
        android:id="@+id/btn"
        android:layout_toRightOf="@id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="允许"
        />
</RelativeLayout>

完工！

源码下载地址：http://download.csdn.net/detail/zhou_anzhuojinjie/9661542