Android 仿硅谷新闻下拉刷新/上拉加载更多

private void initFooterView(Context context) {View footerView = View.inflate(context, R.layout.refresh_listview_footer, null);//隐藏代码footerView.measure(0, 0);int footerViewHeight = footerView.getMeasuredHeight();footerView.setPadding(0, -footerViewHeight, 0, 0);this.addFooterView(footerView);}

<?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:gravity="center"android:orientation="horizontal" ><ProgressBarandroid:layout_margin="5dip"android:layout_width="wrap_content"android:layout_height="wrap_content"android:indeterminateDrawable="@drawable/custom_progressbar" /><TextViewandroid:layout_marginLeft="10dip"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="加载更多中..."android:textColor="#ff0000"android:textSize="25sp" /></LinearLayout>

/*** 菜单页面对应的新闻页签页面* 总共有12个* @author Administrator**/public class TabMenuDetailPager extends MenuDetailBasePagerimplements OnPageChangeListener {/*** 新闻中心-新闻菜单对应的标签对应的数据*/private NewCenterTag newCenterTag;......................./*** 加载更多数据的URL*/private String moreUrl;/*** 是否加载更多数据中*/protected boolean isLoadingMore = false;...................@Overridepublic View initView() {View view = View.inflate(mActivity, R.layout.tab_detail, null);//把View注入到XUtils框架中ViewUtils.inject(this, view); .......................... //设置监听下拉刷新mListView.setOnRefreshListener(new OnRefreshListener() {@Overridepublic void onPullDownRefresh() {isPullDownRefreshing = true;getDataFromNet();}@Overridepublic void onLoadingMore() {if(TextUtils.isEmpty(moreUrl)){Toast.makeText(mActivity, "没有更多数据了", 1).show();mListView.onRefreshFinish(false);}else{//有更多数据，要加载更多数据了getMoreDataFromNet();}}});return view;}/*** 加载更多数据*/protected void getMoreDataFromNet() {HttpUtils httpUtils = new HttpUtils();httpUtils.send(HttpMethod.GET, moreUrl, new RequestCallBack<String>() {@Overridepublic void onSuccess(ResponseInfo<String> responseInfo) {System.out.println("加载更多数据成功："+responseInfo.result);mListView.onRefreshFinish(false);isLoadingMore = true;processData(responseInfo.result);}@Overridepublic void onFailure(HttpException error, String msg) {mListView.onRefreshFinish(false);System.out.println("加载更多数据失败："+ msg);}}); }/*** 处理和解析json数据* @param json*/protected void processData(String json) {TabDetailBean bean = parserJson(json);if(!isLoadingMore){System.out.println(bean.data.news.get(0).title);topnews = bean.data.topnews;//给ViewPager设置适配器TabDetailAdapter adapter = new TabDetailAdapter();mViewPager.setAdapter(adapter);// 把所有的View清除ll_point_group.removeAllViews();for(int i=0;i<topnews.size();i++){View point = new View(mActivity);LayoutParams params = new LayoutParams(5, 5) ;point.setBackgroundResource(R.drawable.tab_detail_point_bg);if(i!=0){params.leftMargin = 10;}point.setEnabled(false);point.setLayoutParams(params);ll_point_group.addView(point);}previousPointPosition = 0;//设置默认的图片描述和指示点mtv_title_description.setText(topnews.get(previousPointPosition).title);ll_point_group.getChildAt(previousPointPosition).setEnabled(true);//设置页面改变的监听mViewPager.setOnPageChangeListener(this);//设置适配器和对应的数据newsLists = bean.data.news;listViewAdapter = new ListViewAdapter();mListView.setAdapter(listViewAdapter);// mListView.addHeaderView(v) ;//把一个视图一头的方式添加到ListView中 }else{//把列表新闻取出来，在加载到以前的集合中，在刷新数据isLoadingMore = false;List<News>moreDataNews = bean.data.news;newsLists.addAll(moreDataNews);listViewAdapter.notifyDataSetChanged();//刷新数据}}................/*** 用Gson开源项目解析json* @param json*/private TabDetailBean parserJson(String json) {Gson gson = new Gson();TabDetailBean bean = gson.fromJson(json, TabDetailBean.class);moreUrl = bean.data.more;if(TextUtils.isEmpty(moreUrl)){moreUrl = null;}else{moreUrl = ConstantUtils.server_url+moreUrl;}return bean;}@Overridepublic void onPageScrollStateChanged(int arg0) {// TODO Auto-generated method stub}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {// TODO Auto-generated method stub}...............}

package com.atguigu.refreshlistview;import android.content.Context;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.animation.Animation;import android.view.animation.RotateAnimation;import android.widget.AbsListView;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.TextView;import java.text.SimpleDateFormat;import java.util.Date;/*** 作用：自定义下拉刷新的ListView*/public class RefreshListview extends ListView {/*** 下拉刷新和顶部轮播图*/private LinearLayout headerView;/*** 下拉刷新控件*/private View ll_pull_down_refresh;private ImageView iv_arrow;private ProgressBar pb_status;private TextView tv_status;private TextView tv_time;/*** 下拉刷新控件的高*/private int pullDownRefreshHeight;/*** 下拉刷新*/public static final int PULL_DOWN_REFRESH = 0;/*** 手松刷新*/public static final int RELEASE_REFRESH = 1;/*** 正在刷新*/public static final int REFRESHING = 2;/*** 当前状态*/private int currentStatus = PULL_DOWN_REFRESH;private Animation upAnimation;private Animation downAnimation;/*** 加载更多的控件*/private View footerView;/*** 加载更多控件高*/private int footerViewHeight;/*** 是否已经加载更多*/private boolean isLoadMore = false;/*** 顶部轮播图部分*/private View topNewsView;/*** ListView在Y轴上的坐标*/private int listViewOnScreenY = -1;public RefreshListview(Context context) {this(context, null);}public RefreshListview(Context context, AttributeSet attrs) {this(context, attrs, 0);}public RefreshListview(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);initHeaderView(context);initAnimation();initFooterView(context);}private void initFooterView(Context context) {footerView = View.inflate(context, R.layout.refresh_footer, null);footerView.measure(0, 0);footerViewHeight = footerView.getMeasuredHeight();footerView.setPadding(0, -footerViewHeight, 0, 0);//ListView添加footeraddFooterView(footerView);//监听ListView的滚动setOnScrollListener(new MyOnScrollListener());}/*** 添加顶部轮播图* @param topNewsView*/public void addTopNewsView(View topNewsView) {if(topNewsView != null){this.topNewsView =topNewsView;headerView.addView(topNewsView);}}class MyOnScrollListener implements OnScrollListener{@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {//当静止或者惯性滚动的时候if(scrollState ==OnScrollListener.SCROLL_STATE_IDLE||scrollState ==OnScrollListener.SCROLL_STATE_FLING){//并且是最后一条可见if(getLastVisiblePosition()>=getCount()-1){//1.显示加载更多布局footerView.setPadding(8,8,8,8);//2.状态改变isLoadMore = true;//3.回调接口if(mOnRefreshListener != null){mOnRefreshListener.onLoadMore();}}}}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {}}private void initAnimation() {upAnimation = new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);upAnimation.setDuration(500);upAnimation.setFillAfter(true);downAnimation = new RotateAnimation(-180, -360, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);downAnimation.setDuration(500);downAnimation.setFillAfter(true);}private void initHeaderView(Context context) {headerView = (LinearLayout) View.inflate(context, R.layout.refresh_header, null);//下拉刷新控件ll_pull_down_refresh = headerView.findViewById(R.id.ll_pull_down_refresh);iv_arrow = (ImageView) headerView.findViewById(R.id.iv_arrow);pb_status = (ProgressBar) headerView.findViewById(R.id.pb_status);tv_status = (TextView) headerView.findViewById(R.id.tv_status);tv_time = (TextView) headerView.findViewById(R.id.tv_time);//测量ll_pull_down_refresh.measure(0, 0);pullDownRefreshHeight = ll_pull_down_refresh.getMeasuredHeight();//默认隐藏下拉刷新控件// View.setPadding(0,-控件高，0,0);//完全隐藏//View.setPadding(0, 0，0,0);//完全显示ll_pull_down_refresh.setPadding(0, -pullDownRefreshHeight, 0, 0);//添加ListView的头addHeaderView(headerView);}private float startY = -1;@Overridepublic boolean onTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_DOWN://1.记录起始坐标startY = ev.getY();break;case MotionEvent.ACTION_MOVE:if (startY == -1) {startY = ev.getY();}//判断顶部轮播图是否完全显示，只有完全显示才会有下拉刷新boolean isDisplayTopNews = isDisplayTopNews();if(!isDisplayTopNews){//加载更多break;}//如果是正在刷新，就不让再刷新了if (currentStatus == REFRESHING) {break;}//2.来到新的坐标float endY = ev.getY();//3.记录滑动的距离float distanceY = endY - startY;if (distanceY > 0) {//下拉//int paddingTop = -控件高 + distanceY;int paddingTop = (int) (-pullDownRefreshHeight + distanceY);if (paddingTop < 0 && currentStatus != PULL_DOWN_REFRESH) {//下拉刷新状态currentStatus = PULL_DOWN_REFRESH;//更新状态refreshViewState();} else if (paddingTop > 0 && currentStatus != RELEASE_REFRESH) {//手松刷新状态currentStatus = RELEASE_REFRESH;//更新状态refreshViewState();}ll_pull_down_refresh.setPadding(0, paddingTop, 0, 0);//View.setPadding(0,paddingTop，0,0);//动态的显示下拉刷新控件}break;case MotionEvent.ACTION_UP:startY = -1;if (currentStatus == PULL_DOWN_REFRESH) {// View.setPadding(0,-控件高，0,0);//完全隐藏ll_pull_down_refresh.setPadding(0, -pullDownRefreshHeight, 0, 0);} else if (currentStatus == RELEASE_REFRESH) {//设置状态为正在刷新currentStatus = REFRESHING;refreshViewState();// View.setPadding(0,0，0,0);//完全显示ll_pull_down_refresh.setPadding(0, 0, 0, 0);//回调接口if (mOnRefreshListener != null) {mOnRefreshListener.onPullDownRefresh();}}break;}return super.onTouchEvent(ev);}/*** 判断是否完全显示顶部轮播图* 当ListView在屏幕上的Y轴坐标小于或者等于顶部轮播图在Y轴的坐标的时候，顶部轮播图完全显示* @return*/private boolean isDisplayTopNews() {if(topNewsView != null){//1.得到ListView在屏幕上的坐标int[] location = new int[2];if(listViewOnScreenY == -1){getLocationOnScreen(location);listViewOnScreenY = location[1];}//2.得到顶部轮播图在屏幕上的坐标topNewsView.getLocationOnScreen(location);int topNewsViewOnScreenY = location[1];// if(listViewOnScreenY <= topNewsViewOnScreenY){// return true;// }else{// return false;// }return listViewOnScreenY <= topNewsViewOnScreenY;}else{return true;}}private void refreshViewState() {switch (currentStatus) {case PULL_DOWN_REFRESH://下拉刷新状态iv_arrow.startAnimation(downAnimation);tv_status.setText("下拉刷新...");break;case RELEASE_REFRESH://手松刷新状态iv_arrow.startAnimation(upAnimation);tv_status.setText("手松刷新...");break;case REFRESHING://正在刷新状态tv_status.setText("正在刷新...");pb_status.setVisibility(VISIBLE);iv_arrow.clearAnimation();iv_arrow.setVisibility(GONE);break;}}/*** 当联网成功和失败的时候回调该方法* 用户刷新状态的还原** @param sucess*/public void onRefreshFinish(boolean sucess) {if(isLoadMore){//加载更多isLoadMore = false;//隐藏加载更多布局footerView.setPadding(0,-footerViewHeight,0,0);}else{//下拉刷新tv_status.setText("下拉刷新...");currentStatus = PULL_DOWN_REFRESH;iv_arrow.clearAnimation();pb_status.setVisibility(GONE);iv_arrow.setVisibility(VISIBLE);//隐藏下拉刷新控件ll_pull_down_refresh.setPadding(0, -pullDownRefreshHeight, 0, 0);if (sucess) {//设置最新更新时间tv_time.setText("上次更新时间：" + getSystemTime());}}}/*** 得到当前Android系统的时间** @return*/private String getSystemTime() {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");return format.format(new Date());}/*** 监听控件的刷新*/public interface OnRefreshListener {/*** 当下拉刷新的时候回调这个方法*/public void onPullDownRefresh();/**当加载更多的时候回调这个方法*/public void onLoadMore();}private OnRefreshListener mOnRefreshListener;/*** 设置监听刷新，由外界设置*/public void setOnRefreshListener(OnRefreshListener l) {this.mOnRefreshListener = l;}}