RecyclerView下拉刷新上拉加载+点击监听

首先创建Recyclerview实现一个listview的效果，然后使用PullRecyclerView实现下拉刷新上拉加载的效果。

先导入4个类

package com.bwei.test.lianxi.view;import android.content.Context;import android.graphics.drawable.AnimationDrawable;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.widget.LinearLayout;import android.widget.ProgressBar;import android.widget.TextView;import com.bwei.test.lianxi.R;/** * 基类：重写LinearLayout，在LinearLayout中依次添加headerview-RecyclerView-footerview, * 并对LinearLayout进行手势监听 * http://blog.csdn.net/baiyuliang2013 */public abstract class PullBaseView<T extends RecyclerView> extends LinearLayout {    protected T mRecyclerView;    private boolean isCanScrollAtRereshing = false;//刷新时是否可滑动    private boolean isCanPullDown = true;//是否可下拉    private boolean isCanPullUp = true;//是否可上拉    // pull state    private static final int PULL_DOWN_STATE = 0;//下拉    private static final int PULL_UP_STATE = 1;//上拉    // refresh states    private static final int PULL_TO_REFRESH = 2;//未达到刷新条件    private static final int RELEASE_TO_REFRESH = 3;//已达到刷新条件    private static final int REFRESHING = 4;//正在刷新    private int mLastMotionY;//last y    private View mHeaderView;//HeaderView    private View mFooterView;//FooterView    private int mHeaderViewHeight;//HeaderView的高度    private int mFooterViewHeight;//FooterView的高度    private TextView mFooterTextView;//FooterView提示语    private ProgressBar mFooterProgressBar;//FooterView ProgressBar    private int mHeaderState;//HeaderView当前刷新状态    private int mFooterState;//FooterView当前刷新状态    private int mPullState;//刷新状态：下拉或上拉    private OnHeaderRefreshListener mOnHeaderRefreshListener;//HeaderView刷新监听    private OnFooterRefreshListener mOnFooterRefreshListener;//FooterView刷新监听    private float startY;//手指落点    private float offsetY;//手指滑动的距离    //headview中的动画实现    private RefreshAnimView refreshAnimView;    private RefreshLoadingView refreshLoadingView;    private AnimationDrawable loadAnimation;    private LayoutInflater mInflater;    public PullBaseView(Context context) {        super(context);    }    public PullBaseView(Context context, AttributeSet attrs) {        super(context, attrs);        init(context, attrs);    }    /**     * init     */    private void init(Context context, AttributeSet attrs) {        mInflater = LayoutInflater.from(getContext());        addHeaderView();//首先在Linear中添加headview        mRecyclerView = createRecyclerView(context, attrs);        mRecyclerView.setOverScrollMode(View.OVER_SCROLL_NEVER);        addView(mRecyclerView);//添加RecyclerView    }    /**     * header view     */    private void addHeaderView() {        mHeaderView = mInflater.inflate(R.layout.refresh_header, this, false);        refreshAnimView = (RefreshAnimView) mHeaderView.findViewById(R.id.first_step_view);        refreshLoadingView = (RefreshLoadingView) mHeaderView.findViewById(R.id.second_step_view);        refreshLoadingView.setBackgroundResource(R.drawable.anim_refresh);        loadAnimation = (AnimationDrawable) refreshLoadingView.getBackground();        measureView(mHeaderView);//测量高度        mHeaderViewHeight = mHeaderView.getMeasuredHeight();        LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mHeaderViewHeight);        params.topMargin = -(mHeaderViewHeight);// 设置topMargin的值为负的header View高度,即将其隐藏在最上方        addView(mHeaderView, params);    }    /**     * footer view     */    private void addFooterView() {        mFooterView = mInflater.inflate(R.layout.refresh_footer, this, false);        mFooterTextView = (TextView) mFooterView.findViewById(R.id.pull_to_load_text);        mFooterProgressBar = (ProgressBar) mFooterView.findViewById(R.id.pull_to_load_progress);        measureView(mFooterView);        mFooterViewHeight = mFooterView.getMeasuredHeight();        LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, mFooterViewHeight);        addView(mFooterView, params);    }    @Override    protected void onFinishInflate() {        super.onFinishInflate();        addFooterView();//最后添加footview    }    /**     * dispatchTouchEvent 在最顶级也就是父布局（Linear）中拦截手势监听     * 1.处理正在刷新时是否可以滑动     * 2.处理头部动画     *     * @param ev     * @return     */    @Override    public boolean dispatchTouchEvent(MotionEvent ev) {        switch (ev.getAction()) {            case MotionEvent.ACTION_DOWN:                startY = ev.getY();                break;            case MotionEvent.ACTION_MOVE:                offsetY = ev.getY() - startY;                if (!isCanScrollAtRereshing) {                    if (mHeaderState == REFRESHING || mFooterState == REFRESHING) {                        return true;                    }                }                if (isCanPullUp&&offsetY > 0) {                    float headerViewShowHeight = offsetY * 0.3f;//headview露出的高度                    float currentProgress = headerViewShowHeight / mHeaderViewHeight;//根据此比例，在滑动时改变动图大小                    if (currentProgress >= 1) {                        currentProgress = 1;                    }                    if (mHeaderState == PULL_TO_REFRESH || mHeaderState == RELEASE_TO_REFRESH) {                        refreshAnimView.setCurrentProgress(currentProgress);//绘制headview中的动画                        refreshAnimView.postInvalidate();                    }                }                break;        }        return super.dispatchTouchEvent(ev);    }    @Override    public boolean onInterceptTouchEvent(MotionEvent e) {        int y = (int) e.getRawY();        switch (e.getAction()) {            case MotionEvent.ACTION_DOWN:                mLastMotionY = y;// 首先拦截down事件,记录y坐标                break;            case MotionEvent.ACTION_MOVE:                int deltaY = y - mLastMotionY; // deltaY > 0 是向下运动,< 0是向上运动                if (isRefreshViewScroll(deltaY)) {                    return true;                }                break;        }        return false;    }    /**     * 如果在onInterceptTouchEvent()方法中没有拦截(即onInterceptTouchEvent()方法中 return false)，     * 则由PullBaseView的子View来处理;否则由下面的方法来处理(即由PullBaseView自己来处理)     */    @Override    public boolean onTouchEvent(MotionEvent event) {        int y = (int) event.getRawY();        switch (event.getAction()) {            case MotionEvent.ACTION_MOVE:                int deltaY = y - mLastMotionY;                if (isCanPullDown&&mPullState == PULL_DOWN_STATE) {                    headerPrepareToRefresh(deltaY);                } else if (isCanPullUp&&mPullState == PULL_UP_STATE) {                    footerPrepareToRefresh(deltaY);                }                mLastMotionY = y;                break;            case MotionEvent.ACTION_UP:            case MotionEvent.ACTION_CANCEL:                int topMargin = getHeaderTopMargin();                if (isCanPullDown&&mPullState == PULL_DOWN_STATE) {                    if (topMargin >= 0) {                        headerRefreshing(); // 开始刷新                    } else {                        setHeaderTopMargin(-mHeaderViewHeight); // 还没有执行刷新，重新隐藏                    }                } else if (isCanPullUp&&mPullState == PULL_UP_STATE) {                    if (Math.abs(topMargin) >= mHeaderViewHeight + mFooterViewHeight) {                        footerRefreshing();// 开始执行footer 刷新                    } else {                        setHeaderTopMargin(-mHeaderViewHeight);// 还没有执行刷新，重新隐藏                    }                }                break;        }        return super.onTouchEvent(event);    }    /**     * 是否应该到了父View,即PullBaseView滑动     *     * @param deltaY , deltaY > 0 是向下运动,< 0是向上运动     * @return     */    private boolean isRefreshViewScroll(int deltaY) {        if (mHeaderState == REFRESHING || mFooterState == REFRESHING) {            return false;        }        if (deltaY >= -20 && deltaY <= 20)            return false;        if (mRecyclerView != null) {            // 滑动到最顶端            if (deltaY > 0) {                View child = mRecyclerView.getChildAt(0);                if (child == null) {                    // mRecyclerView,不拦截                    return false;                }                if (isScrollTop() && child.getTop() == 0) {                    mPullState = PULL_DOWN_STATE;                    return true;                }                int top = child.getTop();                int padding = mRecyclerView.getPaddingTop();                if (isScrollTop() && Math.abs(top - padding) <= 8) {                    mPullState = PULL_DOWN_STATE;                    return true;                }            } else if (deltaY < 0) {                View lastChild = mRecyclerView.getChildAt(mRecyclerView.getChildCount() - 1);                if (lastChild == null) {                    // mRecyclerView,不拦截                    return false;                }                // 最后一个子view的Bottom小于父View的高度说明mRecyclerView的数据没有填满父view,                // 等于父View的高度说明mRecyclerView已经滑动到最后                if (lastChild.getBottom() <= getHeight() && isScrollBottom()) {                    mPullState = PULL_UP_STATE;                    return true;                }            }        }        return false;    }    /**     * 判断mRecyclerView是否滑动到顶部     *     * @return     */    boolean isScrollTop() {        LinearLayoutManager linearLayoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();        if (linearLayoutManager.findFirstVisibleItemPosition() == 0) {            return true;        } else {            return false;        }    }    /**     * 判断mRecyclerView是否滑动到底部     *     * @return     */    boolean isScrollBottom() {        LinearLayoutManager linearLayoutManager = (LinearLayoutManager) mRecyclerView.getLayoutManager();        if (linearLayoutManager.findLastVisibleItemPosition() == (mRecyclerView.getAdapter().getItemCount() - 1)) {            return true;        } else {            return false;        }    }    /**     * header 准备刷新,手指移动过程,还没有释放     *     * @param deltaY ,手指滑动的距离     */    private void headerPrepareToRefresh(int deltaY) {        int newTopMargin = changingHeaderViewTopMargin(deltaY);        // 当header view的topMargin>=0时，说明已经完全显示出来了,修改header view 的提示状态        if (newTopMargin >= 0 && mHeaderState != RELEASE_TO_REFRESH) {            mHeaderState = RELEASE_TO_REFRESH;        } else if (newTopMargin < 0 && newTopMargin > -mHeaderViewHeight) {// 拖动时没有释放            mHeaderState = PULL_TO_REFRESH;        }    }    /**     * footer 准备刷新,手指移动过程,还没有释放 移动footer view高度同样和移动header view     * 高度是一样，都是通过修改header view的topmargin的值来达到     *     * @param deltaY ,手指滑动的距离     */    private void footerPrepareToRefresh(int deltaY) {        int newTopMargin = changingHeaderViewTopMargin(deltaY);        // 如果header view topMargin 的绝对值大于或等于header + footer 的高度        // 说明footer view 完全显示出来了，修改footer view 的提示状态        if (Math.abs(newTopMargin) >= (mHeaderViewHeight + mFooterViewHeight) && mFooterState != RELEASE_TO_REFRESH) {            mFooterTextView.setText(R.string.pull_to_refresh_footer_release_label);            mFooterState = RELEASE_TO_REFRESH;        } else if (Math.abs(newTopMargin) < (mHeaderViewHeight + mFooterViewHeight)) {            mFooterTextView.setText(R.string.pull_to_refresh_footer_pull_label);            mFooterState = PULL_TO_REFRESH;        }    }    /**     * 修改Header view top margin的值     *     * @param deltaY     */    private int changingHeaderViewTopMargin(int deltaY) {        LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();        float newTopMargin = params.topMargin + deltaY * 0.3f;        // 这里对上拉做一下限制,因为当前上拉后然后不释放手指直接下拉,会把下拉刷新给触发了        // 表示如果是在上拉后一段距离,然后直接下拉        if (deltaY > 0 && mPullState == PULL_UP_STATE && Math.abs(params.topMargin) <= mHeaderViewHeight) {            return params.topMargin;        }        // 同样地,对下拉做一下限制,避免出现跟上拉操作时一样的bug        if (deltaY < 0 && mPullState == PULL_DOWN_STATE && Math.abs(params.topMargin) >= mHeaderViewHeight) {            return params.topMargin;        }        params.topMargin = (int) newTopMargin;        mHeaderView.setLayoutParams(params);        invalidate();        return params.topMargin;    }    /**     * header refreshing     */    public void headerRefreshing() {        mHeaderState = REFRESHING;        setHeaderTopMargin(0);        refreshAnimView.setVisibility(View.GONE);        refreshLoadingView.setVisibility(View.VISIBLE);        loadAnimation.start();        if (mOnHeaderRefreshListener != null) {            mOnHeaderRefreshListener.onHeaderRefresh(this);        }    }    /**     * footer refreshing     */    private void footerRefreshing() {        mFooterState = REFRESHING;        int top = mHeaderViewHeight + mFooterViewHeight;        setHeaderTopMargin(-top);        mFooterTextView.setText(R.string.pull_to_refresh_footer_refreshing_label);        mFooterProgressBar.setVisibility(View.VISIBLE);        if (mOnFooterRefreshListener != null) {            mOnFooterRefreshListener.onFooterRefresh(this);        }    }    /**     * 设置header view 的topMargin的值     *     * @param topMargin ，为0时，说明header view 刚好完全显示出来； 为-mHeaderViewHeight时，说明完全隐藏了     */    private void setHeaderTopMargin(int topMargin) {        LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();        params.topMargin = topMargin;        mHeaderView.setLayoutParams(params);        invalidate();    }    /**     * header view 完成更新后恢复初始状态     */    public void onHeaderRefreshComplete() {        setHeaderTopMargin(-mHeaderViewHeight);        refreshAnimView.setVisibility(View.VISIBLE);        refreshLoadingView.setVisibility(View.GONE);        loadAnimation.stop();        mHeaderState = PULL_TO_REFRESH;    }    /**     * footer view 完成更新后恢复初始状态     */    public void onFooterRefreshComplete() {        setHeaderTopMargin(-mHeaderViewHeight);        mFooterTextView.setText(R.string.pull_to_refresh_footer_pull_label);        mFooterProgressBar.setVisibility(View.GONE);        mFooterState = PULL_TO_REFRESH;        if (mRecyclerView != null) {            mRecyclerView.scrollToPosition(mRecyclerView.getAdapter().getItemCount() - 1);        }    }    /**     * 获取当前header view 的topMargin     */    private int getHeaderTopMargin() {        LayoutParams params = (LayoutParams) mHeaderView.getLayoutParams();        return params.topMargin;    }    /**     * 设置下拉监听接口     */    public void setOnHeaderRefreshListener(OnHeaderRefreshListener headerRefreshListener) {        mOnHeaderRefreshListener = headerRefreshListener;    }    /**     * 设置上拉监听接口     */    public void setOnFooterRefreshListener(OnFooterRefreshListener footerRefreshListener) {        mOnFooterRefreshListener = footerRefreshListener;    }    /**     * 上拉监听     */    public interface OnFooterRefreshListener {        void onFooterRefresh(PullBaseView view);    }    /**     * 下拉监听     */    public interface OnHeaderRefreshListener {        void onHeaderRefresh(PullBaseView view);    }    /**     * 设置是否可以在刷新时滑动     *     * @param canScrollAtRereshing     */    public void setCanScrollAtRereshing(boolean canScrollAtRereshing) {        isCanScrollAtRereshing = canScrollAtRereshing;    }    /**     * 设置是否可上拉     * @param canPullUp     */    public void setCanPullUp(boolean canPullUp) {        isCanPullUp = canPullUp;    }    /**     * 设置是否可下拉     * @param canPullDown     */    public void setCanPullDown(boolean canPullDown) {        isCanPullDown = canPullDown;    }    private void measureView(View child) {        ViewGroup.LayoutParams p = child.getLayoutParams();        if (p == null) {            p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);        }        int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);        int lpHeight = p.height;        int childHeightSpec;        if (lpHeight > 0) {            childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);        } else {            childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);        }        child.measure(childWidthSpec, childHeightSpec);    }    /**     * 抽象方法，子类实现，传入View     *     * @param context     * @param attrs     * @return     */    protected abstract T createRecyclerView(Context context, AttributeSet attrs);}

package com.bwei.test.lianxi.view;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.util.AttributeSet;import com.bwei.test.lianxi.util.RecyclerItem;/** * RecyclerView中的所有方法都可以在此类中设置，暴露出去以供调用 */public class PullRecyclerView extends PullBaseView<RecyclerView> {    public PullRecyclerView(Context context) {        this(context, null);    }    public PullRecyclerView(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    protected RecyclerView createRecyclerView(Context context, AttributeSet attrs) {        return new RecyclerView(context, attrs);    }    public void setAdapter(RecyclerView.Adapter adapter) {        mRecyclerView.setAdapter(adapter);    }    public void setLayoutManager(RecyclerView.LayoutManager manager) {        mRecyclerView.setLayoutManager(manager);    }    public void addOnItemTouchListener(RecyclerItem listener){        mRecyclerView.addOnItemTouchListener(listener);    }}

package com.bwei.test.lianxi.view;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Paint;import android.util.AttributeSet;import android.view.View;import com.bwei.test.lianxi.R;public class RefreshAnimView extends View{   private Bitmap daishu;   private int measuredWidth;   private int measuredHeight;   private float mCurrentProgress;   private int mCurrentAlpha;   private Paint mPaint;   private Bitmap scaleDaishu;   public RefreshAnimView(Context context, AttributeSet attrs, int defStyle) {      super(context, attrs, defStyle);      init();   }   public RefreshAnimView(Context context, AttributeSet attrs) {      super(context, attrs);      init();   }   public RefreshAnimView(Context context) {      super(context);      init();   }   private void init(){      //袋鼠bitmap      daishu = BitmapFactory.decodeResource(getResources(), R.mipmap.takeout_img_list_loading_pic1);      //来个画笔，我们注意到袋鼠都有一个渐变效果的，我们用      //mPaint.setAlpha来实现这个渐变的效果      mPaint = new Paint();      //首先设置为完全透明      mPaint.setAlpha(0);   }   /**    * 测量方法    * @param widthMeasureSpec    * @param heightMeasureSpec    */   @Override   protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {      setMeasuredDimension(measureWidth(widthMeasureSpec), measureHeight(heightMeasureSpec));   }   //测量宽度   private int measureWidth(int widthMeasureSpec){      int result = 0;      int size = MeasureSpec.getSize(widthMeasureSpec);      int mode = MeasureSpec.getMode(widthMeasureSpec);      if (MeasureSpec.EXACTLY == mode) {         result = size;      }else {         result = daishu.getWidth();         if (MeasureSpec.AT_MOST == mode) {            result = Math.min(result, size);         }      }      return result;   }   //测量高度   private int measureHeight(int heightMeasureSpec){      int result = 0;      int size = MeasureSpec.getSize(heightMeasureSpec);      int mode = MeasureSpec.getMode(heightMeasureSpec);      if (MeasureSpec.EXACTLY == mode) {         result = size;      }else {         result = daishu.getHeight();         if (MeasureSpec.AT_MOST == mode) {            result = Math.min(result, size);         }      }      return result;   }   //在这里面拿到测量后的宽和高，w就是测量后的宽，h是测量后的高   @Override   protected void onSizeChanged(int w, int h, int oldw, int oldh) {      super.onSizeChanged(w, h, oldw, oldh);      measuredWidth = w;      measuredHeight = h;      //根据测量后的宽高来对袋鼠做一个缩放      scaleDaishu = Bitmap.createScaledBitmap(daishu,measuredWidth,measuredHeight,true);   }   /**    * 绘制方法    * @param canvas    */   @Override   protected void onDraw(Canvas canvas) {      super.onDraw(canvas);      canvas.scale(mCurrentProgress, mCurrentProgress, measuredWidth/2, measuredHeight);      mPaint.setAlpha(mCurrentAlpha);      canvas.drawBitmap(scaleDaishu, 0, 0, mPaint);   }   /**    * 根据进度对袋鼠进行缩放    * @param currentProgress    */   public void setCurrentProgress(float currentProgress){      this.mCurrentProgress = currentProgress;      this.mCurrentAlpha = (int) (currentProgress*255);   }}

package com.bwei.test.lianxi.view;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.util.AttributeSet;import android.view.View;import com.bwei.test.lianxi.R;public class RefreshLoadingView extends View {    private Bitmap endBitmap;    public RefreshLoadingView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init();    }    public RefreshLoadingView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public RefreshLoadingView(Context context) {        super(context);        init();    }    private void init() {        endBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.takeout_img_list_loading_pic1);    }    /**     * 只需要测量方法     *     * @param widthMeasureSpec     * @param heightMeasureSpec     */    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        setMeasuredDimension(measureWidth(widthMeasureSpec), measureHeight(heightMeasureSpec));    }    private int measureWidth(int widthMeasureSpec) {        int result = 0;        int size = MeasureSpec.getSize(widthMeasureSpec);        int mode = MeasureSpec.getMode(widthMeasureSpec);        if (MeasureSpec.EXACTLY == mode) {            result = size;        } else {            result = endBitmap.getWidth();            if (MeasureSpec.AT_MOST == mode) {                result = Math.min(size, result);            }        }        return result;    }    private int measureHeight(int heightMeasureSpec) {        int result = 0;        int size = MeasureSpec.getSize(heightMeasureSpec);        int mode = MeasureSpec.getMode(heightMeasureSpec);        if (MeasureSpec.EXACTLY == mode) {            result = size;        } else {            result = endBitmap.getHeight();            if (MeasureSpec.AT_MOST == mode) {                result = Math.min(size, result);            }        }        return result;    }}

在导入3个布局

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/pull_to_refresh_header"    android:layout_width="fill_parent"    android:layout_height="60dp">    <ProgressBar        android:id="@+id/pull_to_load_progress"        android:layout_width="30dp"        android:layout_height="30dp"        android:layout_centerVertical="true"        android:layout_marginLeft="50dp"        android:visibility="gone"/>    <TextView        android:id="@+id/pull_to_load_text"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        android:text="上拉加载更多"        android:textColor="#BBBCBD"        android:textSize="16sp" /></RelativeLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_weight="1">        <com.bwei.test.lianxi.view.RefreshAnimView            android:id="@+id/first_step_view"            android:layout_width="49dp"            android:layout_height="59dp"            android:layout_alignParentBottom="true"            android:layout_centerHorizontal="true"            android:layout_margin="10dp" />        <com.bwei.test.lianxi.view.RefreshLoadingView            android:id="@+id/second_step_view"            android:layout_width="49dp"            android:layout_height="59dp"            android:layout_alignParentBottom="true"            android:layout_centerHorizontal="true"            android:layout_margin="10dp"            android:visibility="gone" />    </RelativeLayout>    <View        android:layout_width="match_parent"        android:layout_height="0.1dp"        android:background="#D0D0D0" /></LinearLayout>

子布局：

<?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="40dp">    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        android:text="Hello World!" />    <View        android:layout_width="match_parent"        android:layout_height="0.1dp"        android:layout_alignParentBottom="true"        android:background="#D0D0D0" /></RelativeLayout>

valuse中strings.xml

<string name="pull_to_refresh_pull_label">下拉刷新</string><string name="pull_to_refresh_release_label">松开刷新</string><string name="pull_to_refresh_refreshing_label">正在刷新\u2026</string><string name="pull_to_refresh_footer_release_label">松开加载更多</string><string name="pull_to_refresh_footer_pull_label">上拉加载更多</string><string name="pull_to_refresh_footer_refreshing_label">加载中\u2026</string>

在drawable中实现下拉刷新动画

<?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/takeout_img_list_loading_pic1" android:duration="50"/>   <item android:drawable="@mipmap/takeout_img_list_loading_pic2" android:duration="50"/></animation-list>

在main方法中添加

implements PullBaseView.OnHeaderRefreshListener, PullBaseView.OnFooterRefreshListener

//设置下拉监听recycler.setOnHeaderRefreshListener(this);//设置上拉监听recycler.setOnFooterRefreshListener(this);

@Overridepublic void onHeaderRefresh(PullBaseView view) {    new Handler().postDelayed(new Runnable() {        @Override        public void run() {            //  mDatas.add(0, "TEXT新增");            adapter.notifyDataSetChanged();            recycler.onHeaderRefreshComplete();        }    }, 3000);}@Overridepublic void onFooterRefresh(PullBaseView view) {    new Handler().postDelayed(new Runnable() {        @Override        public void run() {            adapter.notifyDataSetChanged();            recycler.onFooterRefreshComplete();        }    },2000);}

最后实现效果：