可上拉刷新下拉加载的recyclerView

效果图

先是adapter:

import android.content.Context;import android.support.v7.widget.GridLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import com.example.refreshrecylerview.R;import java.util.ArrayList;import java.util.List;/** * Created by yebin on 2016/12/7. */public class MyAdapeter extends RecyclerView.Adapter<MyAdapeter.MyHolder> {    private RecyclerView mRecyclerView;    private List<String> data = new ArrayList<>();    private Context mContext;    private View VIEW_FOOTER;    private View VIEW_HEADER;    //Type    private int TYPE_NORMAL = 1000;    private int TYPE_HEADER = 1001;    private int TYPE_FOOTER = 1002;    public MyAdapeter(List<String> data,Context mContext){        this.data=data;        this.mContext=mContext;    }    @Override    public MyHolder onCreateViewHolder(ViewGroup parent, int viewType) {        if(viewType==TYPE_HEADER){            return new MyHolder(VIEW_HEADER);        }else if(viewType==TYPE_FOOTER){            return new MyHolder(VIEW_FOOTER);        }else {            return new MyHolder(LayoutInflater.from(mContext).inflate(R.layout.item_recylerview,parent,false));        }    }    @Override    public void onBindViewHolder(MyHolder holder, int position) {        if(!isHeaderView(position)&&!isFooterView(position)){            if(haveHeaderView()){                position--;            }            TextView textView = (TextView) holder.itemView.findViewById(R.id.item_content);            textView.setText(data.get(position));        }    }    @Override    public int getItemCount() {        int count=(data==null?0:data.size());        if(haveHeaderView()){            count++;        }        if(haveFooterView()){            count++;        }        return count;    }    @Override    public int getItemViewType(int position) {        if(isHeaderView(position)){            return TYPE_HEADER;        }else if(isFooterView(position)){            return TYPE_FOOTER;        }else {            return TYPE_NORMAL;        }    }    public void addHeaderView(View headerView){        if (haveHeaderView()) {            throw new IllegalStateException("hearview has already exists!");        } else {            ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);            headerView.setLayoutParams(params);            VIEW_HEADER=headerView;            ifGridLayoutManager();            notifyItemInserted(0);        }    }    public void addFooterView(View footerView){        if (haveFooterView()) {            throw new IllegalStateException("footerView has already exists!");        } else {            ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);            footerView.setLayoutParams(params);            VIEW_FOOTER=footerView;            ifGridLayoutManager();            notifyItemInserted(getItemCount()-1);        }    }    private boolean isHeaderView(int position) {        return haveHeaderView()&&position==0;    }    private boolean isFooterView(int position) {        return haveFooterView()&&position==getItemCount()-1;    }    private boolean haveHeaderView() {        return VIEW_HEADER!=null;    }    private boolean haveFooterView() {        return VIEW_FOOTER!=null;    }    public static class MyHolder extends RecyclerView.ViewHolder{        public MyHolder(View view){            super(view);        }    }    @Override    public void onAttachedToRecyclerView(RecyclerView recyclerView) {        try {            if(mRecyclerView==null||mRecyclerView!=recyclerView){                mRecyclerView=recyclerView;            }            ifGridLayoutManager();        }catch (Exception e){            e.printStackTrace();        }    }    private void ifGridLayoutManager() {        if(mRecyclerView==null){            return;        }        final RecyclerView.LayoutManager layoutManager = mRecyclerView.getLayoutManager();        if(layoutManager instanceof GridLayoutManager){            GridLayoutManager.SpanSizeLookup originSpanSizeLookup = ((GridLayoutManager) layoutManager).getSpanSizeLookup();            ((GridLayoutManager) layoutManager).setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {                @Override                public int getSpanSize(int position) {                    return isHeaderView(position)||isFooterView(position)? ((GridLayoutManager) layoutManager).getSpanCount():1;                }            });        }    }    public View getHeaderView(){        return VIEW_HEADER;    }    public View getFooterView(){        return VIEW_FOOTER;    }}

然后就是RefreshRecyclerView 这里只写了垂直方向的线性列表 没有考虑网格等其他布局

import android.content.Context;import android.graphics.drawable.AnimationDrawable;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.Log;import android.view.MotionEvent;import android.view.View;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import com.example.refreshrecylerview.R;/** * Created by yebin on 2016/12/7. */public class RefreshRecyclerView extends RecyclerView {    //就是刷新的头    private LinearLayout headerView;    //刷新的头中可以隐藏部分    private View mPullDownHeaderView;    //隐藏部分高度    private int headerViewHeight;    private ImageView headerViewProgess;    private TextView headerViewMessage;    private View footerView;    private int footerViewHeight;    //headerView中的第二布局，用于添加其他头布局    private View secondHeaderView;    //监听    private onRefreshListner mOnRefreshListner;    private final int PULL_DOWN_REFRESH = 0; // 下拉刷新    private final int RELEASE_REFRESH = 1; // 释放更新    private final int REFRESHING = 2; // 加载中    private int currentState = PULL_DOWN_REFRESH; // 当前状态    private Boolean isLoardingMore=false;    private int mRecyclerViewYOnScreen=-1;    private int downY = -1;    private LinearLayoutManager mLinearLayoutManager;    private MyAdapeter mMyAdapeter;    public RefreshRecyclerView(Context context){        this(context,null);    }    public RefreshRecyclerView(Context context, AttributeSet attrs) {        super(context, attrs);        //默认只能是垂直的。        mLinearLayoutManager = new LinearLayoutManager(context);        mLinearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);        setLayoutManager(mLinearLayoutManager);    }    @Override    public void setAdapter(Adapter adapter) {        super.setAdapter(adapter);        if(adapter instanceof  MyAdapeter){            mMyAdapeter= ((MyAdapeter) adapter);            initHeaderView(mMyAdapeter);            initFooterView(mMyAdapeter);        }    }    private void initFooterView(MyAdapeter adapter) {        footerView=adapter.getFooterView();        footerView.measure(0,0);        footerViewHeight=footerView.getMeasuredHeight();        footerView.setPadding(0,-footerViewHeight,0,0);        this.setOnScrollListener(new MyScrollListner());    }    private void initHeaderView(MyAdapeter adapter) {        headerView= (LinearLayout) adapter.getHeaderView();        if(headerView!=null){            headerViewProgess = (ImageView) headerView.findViewById(R.id.progress_view_loading);            headerViewMessage = (TextView) headerView.findViewById(R.id.progress_view_message);            mPullDownHeaderView= headerView.findViewById(R.id.ll_pull_down_header_view);            mPullDownHeaderView.measure(0,0);            headerViewHeight=mPullDownHeaderView.getMeasuredHeight();            mPullDownHeaderView.setPadding(0,-headerViewHeight,0,0);        }    }    public void addSecondHeaderView(View secondHeaderView){        this.secondHeaderView=secondHeaderView;        headerView.addView(secondHeaderView);    }    @Override    public boolean onTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {            case MotionEvent.ACTION_DOWN:                downY = (int) ev.getY();                break;            case MotionEvent.ACTION_MOVE:                if (downY == -1) {                    downY = (int) ev.getY();                }                int moveY= (int) ev.getY();                int diffY=moveY-downY;                if (currentState == REFRESHING) {                    break;                }                if (!isDisplaySecondHeaderView()) {                    break;                }                if(diffY>0){                    int paddingTop=-headerViewHeight+diffY/3;                    if(paddingTop>0&&currentState!=RELEASE_REFRESH){                        currentState=RELEASE_REFRESH;                        refreshHeadViewState();                    }else if(paddingTop<0&&currentState!=PULL_DOWN_REFRESH){                        currentState=PULL_DOWN_REFRESH;                        refreshHeadViewState();                    }                    mPullDownHeaderView.setPadding(0,paddingTop,0,0);                }                break;            case MotionEvent.ACTION_UP:                downY=-1;                if(currentState==PULL_DOWN_REFRESH){                    mPullDownHeaderView.setPadding(0,-headerViewHeight,0,0);                }else if(currentState==RELEASE_REFRESH){                    currentState=REFRESHING;                    refreshHeadViewState();                    mPullDownHeaderView.setPadding(0,0,0,0);                    if(mOnRefreshListner!=null){                        mOnRefreshListner.onPullDownRefresh();                    }                }                break;            default:                break;        }        return super.onTouchEvent(ev);    }    public boolean isDisplaySecondHeaderView() {        int[] laction=new int[2];        if(mRecyclerViewYOnScreen==-1){            getLocationOnScreen(laction);            mRecyclerViewYOnScreen=laction[1];        }        secondHeaderView.getLocationOnScreen(laction);        int secondHeaderViewYOnScreen = laction[1];        return mRecyclerViewYOnScreen<=secondHeaderViewYOnScreen;    }    private void refreshHeadViewState(){        switch (currentState){            case PULL_DOWN_REFRESH:                stopProgress();                headerViewMessage.setText("下拉刷新");                break;            case REFRESHING:                startProgress();                headerViewMessage.setText("加载中。。。。");                break;            case RELEASE_REFRESH:                stopProgress();                headerViewMessage.setText("释放更新");                break;            default:                break;        }    }    public interface onRefreshListner{        public void onPullDownRefresh();        public void onLoardingMore();    }    public void setOnRefreshListner(onRefreshListner listner){        this.mOnRefreshListner=listner;    }    /**     * 获取第一条展示的位置     *     * @return     */    private int getFirstVisiblePosition() {        int position;        if (getLayoutManager() instanceof LinearLayoutManager) {            position = ((LinearLayoutManager) getLayoutManager()).findFirstVisibleItemPosition();        } else if (getLayoutManager() instanceof GridLayoutManager) {            position = ((GridLayoutManager) getLayoutManager()).findFirstVisibleItemPosition();        } else if (getLayoutManager() instanceof StaggeredGridLayoutManager) {            StaggeredGridLayoutManager layoutManager = (StaggeredGridLayoutManager) getLayoutManager();            int[] lastPositions = layoutManager.findFirstVisibleItemPositions(new int[layoutManager.getSpanCount()]);            position = getMinPositions(lastPositions);        } else {            position = 0;        }        return position;    }    /**     * 获取最后一条展示的位置     *     * @return     */    private int getLastVisiblePosition() {        int position;        if (getLayoutManager() instanceof LinearLayoutManager) {            position = ((LinearLayoutManager) getLayoutManager()).findLastVisibleItemPosition();        } else if (getLayoutManager() instanceof GridLayoutManager) {            position = ((GridLayoutManager) getLayoutManager()).findLastVisibleItemPosition();        } else if (getLayoutManager() instanceof StaggeredGridLayoutManager) {            StaggeredGridLayoutManager layoutManager = (StaggeredGridLayoutManager) getLayoutManager();            int[] lastPositions = layoutManager.findLastVisibleItemPositions(new int[layoutManager.getSpanCount()]);            position = getMaxPosition(lastPositions);        } else {            position = getLayoutManager().getItemCount() - 1;        }        return position;    }    /**     * 获得最大的位置     *     * @param positions     * @return     */    private int getMaxPosition(int[] positions) {        int size = positions.length;        int maxPosition = Integer.MIN_VALUE;        for (int i = 0; i < size; i++) {            maxPosition = Math.max(maxPosition, positions[i]);        }        return maxPosition;    }    /**     * 获得当前展示最小的position     *     * @param positions     * @return     */    private int getMinPositions(int[] positions) {        int size = positions.length;        int minPosition = Integer.MAX_VALUE;        for (int i = 0; i < size; i++) {            minPosition = Math.min(minPosition, positions[i]);        }        return minPosition;    }    private void startProgress(){        AnimationDrawable animations = (AnimationDrawable) headerViewProgess.getBackground();        animations.start();    }    private void stopProgress(){        AnimationDrawable animations = (AnimationDrawable) headerViewProgess.getBackground();        animations.stop();    }    public void onRefreshfinish(boolean isSuccess){        stopProgress();        if(isLoardingMore){            footerView.setPadding(0,-footerViewHeight,0,0);            isLoardingMore=false;        }else {            mPullDownHeaderView.setPadding(0,-headerViewHeight,0,0);            currentState=PULL_DOWN_REFRESH;            headerViewMessage.setText("下拉刷新");            if(isSuccess){            }else {            }        }    }    class MyScrollListner extends OnScrollListener{        @Override        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {            super.onScrollStateChanged(recyclerView, newState);            if(newState==RecyclerView.SCROLL_STATE_IDLE||newState==RecyclerView.SCROLL_STATE_DRAGGING){                if(getLastVisiblePosition()==mMyAdapeter.getItemCount()-1&&!isLoardingMore){                    Log.e("AAAAAA","getLastVisiblePosition="+getLastVisiblePosition()+",getCount="+mMyAdapeter.getItemCount());                    isLoardingMore=true;                    footerView.setPadding(0,0,0,0);                    if(mOnRefreshListner!=null){                        mOnRefreshListner.onLoardingMore();                    }                }            }        }        @Override        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {            super.onScrolled(recyclerView, dx, dy);        }    }}

布局：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <com.example.refreshrecylerview.widght.RefreshRecyclerView        android:id="@+id/recyclerView"        android:layout_width="match_parent"        android:layout_height="match_parent">    </com.example.refreshrecylerview.widght.RefreshRecyclerView></RelativeLayout>

还有一个是动画集：

<?xml version="1.0" encoding="utf-8"?>  <animation-list    xmlns:android="http://schemas.android.com/apk/res/android"    android:oneshot="false"    >      <item android:drawable="@mipmap/loading_refresh1" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh2" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh3" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh4" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh5" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh6" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh7" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh8" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh9" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh10" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh11" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh12" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh13" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh14" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh15" android:duration="50"></item>    <item android:drawable="@mipmap/loading_refresh16" android:duration="50"></item></animation-list> 

最后是使用：

import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import com.example.refreshrecylerview.decoration.DividerItemDecoration;import com.example.refreshrecylerview.widght.MyAdapeter;import com.example.refreshrecylerview.widght.RefreshRecyclerView;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {    private  ArrayList<String> datas=new ArrayList<>();    private  RefreshRecyclerView recyclerView;    private MyAdapeter myAdapeter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        recyclerView = (RefreshRecyclerView) this.findViewById(R.id.recyclerView);        //此处添加分割线        recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL_LIST));        String str=new String();        for (int i = 0; i < 30; i++) {            str="我是第 "+i+" 个条目";            datas.add(str);        }        myAdapeter = new MyAdapeter(datas, this);        myAdapeter.addHeaderView(LayoutInflater.from(this).inflate(R.layout.refresh_listview_header,null));        myAdapeter.addFooterView(LayoutInflater.from(this).inflate(R.layout.refresh_listview_footer,null));        recyclerView.setAdapter(myAdapeter);        //下面这句代码一点要写，主要是考虑到头布局里可以加入一些其他布局，如ViewPager等        recyclerView.addSecondHeaderView(new View(this));        recyclerView.setOnRefreshListner(new RefreshRecyclerView.onRefreshListner() {            @Override            public void onPullDownRefresh() {                refreshData();            }            @Override            public void onLoardingMore() {                loardingData();            }        });    }    public void refreshData(){        new Thread(new Runnable() {            @Override            public void run() {                datas.clear();                String str;                for (int i = 0; i < 30; i++) {                    str="我是第 "+i+" 个条目";                    datas.add(str);                }                try {                    Thread.sleep(1000);                } catch (InterruptedException e) {                    e.printStackTrace();                }                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        recyclerView.onRefreshfinish(true);                        myAdapeter.notifyDataSetChanged();                    }                });            }        }).start();    }    public void loardingData(){        new Thread(new Runnable() {            @Override            public void run() {                int size = datas.size();                String str;                for (int i = size; i < size+10; i++) {                    str="我是第 "+i+" 个条目";                    datas.add(str);                }                try {                    Thread.sleep(1000);                } catch (InterruptedException e) {                    e.printStackTrace();                }                runOnUiThread(new Runnable() {                    @Override                    public void run() {                        recyclerView.onRefreshfinish(true);                        myAdapeter.notifyDataSetChanged();                    }                });            }        }).start();    }}

分割线：

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) {        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);            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child                    .getLayoutParams();            final int top = child.getBottom() + params.bottomMargin +                    Math.round(ViewCompat.getTranslationY(child));            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 +                    Math.round(ViewCompat.getTranslationX(child));            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);        }    }}