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@@ -0,0 +1,323 @@
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+package com.usai.apex.Result;
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+
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+import android.content.Context;
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+import android.util.AttributeSet;
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+import android.view.MotionEvent;
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+import android.view.View;
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+import android.view.ViewGroup;
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+import android.view.animation.RotateAnimation;
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+import android.widget.AbsListView;
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+import android.widget.ListView;
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+
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+import java.text.SimpleDateFormat;
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+import java.util.Date;
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+
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+public class PullRefreshListView extends ListView implements AbsListView.OnScrollListener {
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+
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+ /**
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+ * 头布局
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+ */
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+ private View headerView;
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+
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+ /**
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+ * 头部布局的高度
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+ */
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+ private int headerViewHeight;
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+
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+ /**
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+ * 底部布局
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+ */
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+ private View footerView;
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+
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+
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+ /**
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+ * 底部布局的高度
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+ */
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+ private int footerViewHeight;
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+
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+
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+ /**
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+ * 按下时的Y坐标
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+ */
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+ private int downY;
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+
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+ public static final int PULL_REFRESH = 0;//下拉刷新的状态
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+ public static final int RELEASE_REFRESH = 1;//松开刷新的状态
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+ public static final int REFRESHING = 2;//正在刷新的状态
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+
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+ /**
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+ * 当前下拉刷新处于的状态
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+ */
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+ private int currentState = PULL_REFRESH;
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+
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+ /**
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+ * 头部布局在下拉刷新改变时，图标的动画
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+ */
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+ private RotateAnimation upAnimation,downAnimation;
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+
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+ private boolean isLoadingMore = false;
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+ private boolean isRefreshing = false;
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+
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+ public PullRefreshListView(Context context) {
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+ this(context,null);
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+ }
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+
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+ public PullRefreshListView(Context context, AttributeSet attrs) {
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+ super(context, attrs);
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+ init();
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+ }
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+
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+ private void init(){
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+ //设置滑动监听
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+ setOnScrollListener(this);
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+ //初始化头布局
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+ initHeaderView();
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+ //初始化头布局中图标的旋转动画
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+ initRotateAnimation();
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+ //初始化为尾布局
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+ initFooterView();
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+ }
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+
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+ @Override
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+ public void setLayoutParams(ViewGroup.LayoutParams params) {
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+ super.setLayoutParams(params);
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+ }
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+
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+ /**
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+ * 初始化headerView
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+ */
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+ private void initHeaderView() {
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+
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+// headerView = View.inflate(getContext(), R.layout.refresh_header, null);
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+ if (headerView != null) {
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+ //测量headView的高度
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+ headerView.measure(0, 0);
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+ //获取高度，并保存
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+ headerViewHeight = headerView.getMeasuredHeight();
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+ //设置paddingTop = -headerViewHeight;这样，该控件被隐藏
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+// headerView.setPadding(0, -headerViewHeight, 0, 0);
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+ headerStateChange(currentState,-headerViewHeight);
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+ //添加头布局
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+ addHeaderView(headerView);
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+ }
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+ }
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+
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+ /**
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+ * 初始化旋转动画
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+ */
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+ private void initRotateAnimation() {
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+
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+ upAnimation = new RotateAnimation(0, -180,
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+ RotateAnimation.RELATIVE_TO_SELF, 0.5f,
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+ RotateAnimation.RELATIVE_TO_SELF, 0.5f);
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+ upAnimation.setDuration(300);
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+ upAnimation.setFillAfter(true);
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+
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+ downAnimation = new RotateAnimation(-180, -360,
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+ RotateAnimation.RELATIVE_TO_SELF, 0.5f,
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+ RotateAnimation.RELATIVE_TO_SELF, 0.5f);
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+ downAnimation.setDuration(300);
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+ downAnimation.setFillAfter(true);
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+ }
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+
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+ //初始化底布局，与头布局同理
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+ private void initFooterView() {
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+
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+// footerView = View.inflate(getContext(), R.layout.refresh_footer, null);
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+ if (footerView != null) {
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+ footerView.measure(0, 0);
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+ footerViewHeight = footerView.getMeasuredHeight();
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+// footerView.setPadding(0, -footerViewHeight, 0, 0);
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+ footerStateChange(PULL_REFRESH, -footerViewHeight);
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+ addFooterView(footerView);
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+ }
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+ }
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+
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+ public void setRefreshHeader(View header) {
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+ headerView = header;
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+ initHeaderView();
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+ }
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+
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+ public void setRefreshFooter(View footer) {
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+ footerView = footer;
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+ initFooterView();
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+ }
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+
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+ @Override
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+ public boolean onTouchEvent(MotionEvent ev) {
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+
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+ if (headerView == null) {
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+ return super.onTouchEvent(ev);
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+ }
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+
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+ switch (ev.getAction()) {
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+ case MotionEvent.ACTION_DOWN:
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+ //获取按下时y坐标
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+ downY = (int) ev.getY();
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+ break;
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+ case MotionEvent.ACTION_MOVE:
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+
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+ if(currentState==REFRESHING){
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+ //如果当前处在滑动状态，则不做处理
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+ break;
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+ }
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+ //手指滑动偏移量
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+ int deltaY = (int) (ev.getY() - downY);
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+
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+ //获取新的padding值
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+ int paddingTop = -headerViewHeight + deltaY;
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+
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+ if(paddingTop>-headerViewHeight && getFirstVisiblePosition()==0){
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+ //向下滑，且处于顶部，设置padding值，该方法实现了顶布局慢慢滑动显现
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+// headerView.setPadding(0, paddingTop, 0, 0);
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+
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+
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+ if(paddingTop>=0 && currentState==PULL_REFRESH){
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+
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+ //从下拉刷新进入松开刷新状态
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+ currentState = RELEASE_REFRESH;
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+ }else if (paddingTop<0 && currentState==RELEASE_REFRESH) {
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+
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+ //进入下拉刷新状态
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+ currentState = PULL_REFRESH;
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+ }
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+
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+ headerStateChange(currentState,paddingTop);
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+
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+ return true;//拦截TouchMove，不让listview处理该次move事件,会造成listview无法滑动
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+ }
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+
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+
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+ break;
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+ case MotionEvent.ACTION_UP:
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+
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+ if(currentState==PULL_REFRESH){
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+ //仍处于下拉刷新状态，未滑动一定距离，不加载数据，隐藏headView
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+// headerView.setPadding(0, -headerViewHeight, 0, 0);
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+ headerStateChange(currentState,-headerViewHeight);
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+
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+ }else if (currentState==RELEASE_REFRESH) {
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+
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+ //滑倒一定距离，显示无padding值得headcView
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+// headerView.setPadding(0, 0, 0, 0);
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+
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+ //设置状态为刷新
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+ currentState = REFRESHING;
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+
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+ //刷新头部布局
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+ headerStateChange(currentState,0);
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+
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+ }
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+ break;
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+ }
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+ return super.onTouchEvent(ev);
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+ }
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+
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+
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+ private void headerStateChange(int state,int offset) {
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+
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+ if (state == REFRESHING) {
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+ isRefreshing = true;
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+ }
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+
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+ if (headerView == null) {
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+ return;
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+ }
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+
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+ headerView.setPadding(0, offset, 0, 0);
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+ if (listener != null) {
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+ listener.onHeaderStateChange(state,offset);
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+ }
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+ }
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+
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+ private void footerStateChange(int state,int offset) {
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+
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+ if (state == REFRESHING) {
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+ isRefreshing = true;
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+ }
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+
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+ if (footerView == null) {
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+ return;
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+ }
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+
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+ footerView.setPadding(0, offset, 0, 0);
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+
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+ if (listener != null) {
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+ listener.onFooterStateChange(state,offset + footerViewHeight);
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+ }
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+ }
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+
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+ /**
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+ * 完成刷新操作，重置状态,在你获取完数据并更新完adater之后，去在UI线程中调用该方法
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+ */
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+ public void completeRefresh(){
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+
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+ isRefreshing = false;
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+ if(isLoadingMore){
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+
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+ //重置footerView状态
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+// footerView.setPadding(0, -footerViewHeight, 0, 0);
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+ isLoadingMore = false;
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+ footerStateChange(PULL_REFRESH,-footerViewHeight);
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+ } else {
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+
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+ //重置headerView状态
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+// headerView.setPadding(0, -headerViewHeight, 0, 0);
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+ currentState = PULL_REFRESH;
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+ headerStateChange(currentState,-headerViewHeight);
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+ }
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+ }
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+
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+ /**
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+ * 获取当前系统时间，并格式化
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+ * @return
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+ */
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+ private String getCurrentTime(){
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+ SimpleDateFormat format = new SimpleDateFormat("yy-MM-dd HH:mm:ss");
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+ return format.format(new Date());
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+ }
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+
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+ private OnRefreshListener listener;
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+ public void setOnRefreshListener(OnRefreshListener listener){
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+ this.listener = listener;
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+ }
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+ public interface OnRefreshListener{
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+ void onHeaderStateChange(int state, int offset);
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+ void onFooterStateChange(int state, int offset);
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+ }
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+
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+ /**
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+ * SCROLL_STATE_IDLE:闲置状态，就是手指松开
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+ * SCROLL_STATE_TOUCH_SCROLL：手指触摸滑动，就是按着来滑动
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+ * SCROLL_STATE_FLING：快速滑动后松开
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+ */
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+ @Override
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+ public void onScrollStateChanged(AbsListView view, int scrollState) {
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+
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+ if (footerView == null) {
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+ return;
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+ }
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+
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+ if(scrollState==OnScrollListener.SCROLL_STATE_IDLE
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+ && getLastVisiblePosition()==(getCount()-1) &&!isLoadingMore){
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+ if (!isRefreshing) {
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+
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+ isRefreshing = true;
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+ isLoadingMore = true;
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+
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+// footerView.setPadding(0, 0, 0, 0);//显示出footerView
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+ footerStateChange(REFRESHING,0);
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+
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+ setSelection(getCount());//让listview最后一条显示出来，在页面完全显示出底布局
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+
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+ }
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+ }
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+ }
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+
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+
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+ @Override
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+ public void onScroll(AbsListView view, int firstVisibleItem,
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+ int visibleItemCount, int totalItemCount) {
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+ }
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+
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+}
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Pen Li