ListView Api bixu 好好看看
mNewsAdapter.notifyDataSetChanged();//刷新ListView
自定义的RefreashListView
package com.itguang.dell_pc.myapplication.view;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.ListView;import android.widget.ProgressBar;import android.widget.TextView;import com.itguang.dell_pc.myapplication.R;import java.text.SimpleDateFormat;import java.util.Date;/*** 作者: 小光哥 on 2016/7/7.* 邮箱: 1445037803@qq.com* 修订历史:* 描述:* ┏┓ ┏┓* ┏┛┻━━━┛┻┓━━━━┻┓* ┃ ┃* ┃ ━ ┃* ┃ ＞ ＜ ┃* ┃ ┃* ┃... ⌒ ... ┃* ┃ ┃* ┗━┓ ┏━┛* ┃ ┃ Code is far away from bug with the animal protecting* ┃ 史 ┃ 神兽保佑,代码无bug* ┃ 诗 ┃* ┃ 之 ┃* ┃ 宠 ┃* ┃ ┃* ┃ ┗━━━┓* ┃BUG天敌 ┣┓┣┓┣┓┣┓┣┓* ┃ ┏┛* ┗┓┓┏━┳┓┏┛* ┃┫┫ ┃┫┫* ┗┻┛ ┗┻┛*/public class RefreshListView extends ListView implements AbsListView.OnScrollListener {private static final int STATE_PULL_REFRESH = 0;// 下拉刷新private static final int STATE_RELEASE_REFRESH = 1;// 松开刷新private static final int STATE_REFRESHING = 2;// 正在刷新private int mCurrrentState = STATE_PULL_REFRESH;// 当前状态private View mHeaderView;private TextView tvTitle;private TextView tvTime;private ProgressBar pbProgress;private ImageView ivArrow;private RotateAnimation animUp;private RotateAnimation animDown;private int startY = -1;// 滑动起点的y坐标private int endY;private int measuredHeight;private int mFooterViewHeight;private View footerView;public RefreshListView(Context context) {super(context);initHeaderView();initFooterView();}public RefreshListView(Context context, AttributeSet attrs) {super(context, attrs);initHeaderView();initFooterView();}public RefreshListView(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);initHeaderView();initFooterView();}/*** 初始化头布局*/private void initHeaderView() {mHeaderView = View.inflate(getContext(), R.layout.refeeash_header, null);this.addHeaderView(mHeaderView);tvTitle = (TextView) mHeaderView.findViewById(R.id.tv_title);tvTime = (TextView) mHeaderView.findViewById(R.id.tv_time);pbProgress = (ProgressBar) mHeaderView.findViewById(R.id.pb_progress);ivArrow = (ImageView) mHeaderView.findViewById(R.id.iv_arr);mHeaderView.measure(0, 0);//先测量再拿到它的高度measuredHeight = mHeaderView.getMeasuredHeight();mHeaderView.setPadding(0, -measuredHeight, 0, 0);initArrowAnim();tvTime.setText("最后刷新时间:" + getCurrentTime());}/*** 初始化脚布局*/public void initFooterView() {footerView = View.inflate(getContext(), R.layout.refreash_listview_footer, null);this.addFooterView(footerView);footerView.measure(0, 0);mFooterViewHeight = footerView.getMeasuredHeight();footerView.setPadding(0, -mFooterViewHeight, 0, 0);//默认隐藏脚布局this.setOnScrollListener(this);}private boolean isLoadingMOre;@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {if (scrollState == SCROLL_STATE_FLING || scrollState == SCROLL_STATE_IDLE) {if (getLastVisiblePosition() == getCount() - 1 && !isLoadingMOre) {//滑倒最后System.out.println("到底了......");footerView.setPadding(0, 0, 0, 0);setSelection(getCount() - 1);//改变ListView的显示位置isLoadingMOre = true;if (mListener != null) {mListener.onLoadMore();}}}}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {}@Overridepublic boolean onTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:startY = (int) ev.getRawY();break;case MotionEvent.ACTION_MOVE:if (startY == -1) {//有时候不会响应 MotionEvent.ACTION_DOWN 事件,这是要重新获取startY坐标startY = (int) ev.getRawY();}//当正在刷新的时候,跳出循环,不再执行下面逻辑if (mCurrrentState == STATE_RELEASE_REFRESH) {break;}endY = (int) ev.getRawY();int dy = endY - startY;//计算手指滑动距离if (dy > 0 && getFirstVisiblePosition() == 0) {// 只有下拉并且当前是第一个item,才允许下拉int padding = dy - measuredHeight;//计算paddingmHeaderView.setPadding(0, padding, 0, 0);//设置当前paddingif (padding > 0 && mCurrrentState != STATE_RELEASE_REFRESH) {mCurrrentState = STATE_RELEASE_REFRESH;refreshState();} else if (padding < 0 && mCurrrentState != STATE_PULL_REFRESH) {// 改为下拉刷新状态mCurrrentState = STATE_PULL_REFRESH;refreshState();}return true;}break;case MotionEvent.ACTION_UP:startY = -1;//手指抬起重置//当状态是松开刷新时抬起了手指,正在刷新if (mCurrrentState == STATE_RELEASE_REFRESH) {mCurrrentState = STATE_REFRESHING;// 正在刷新mHeaderView.setPadding(0, 0, 0, 0);// 显示refreshState();} else if (mCurrrentState == STATE_PULL_REFRESH) {mHeaderView.setPadding(0, -measuredHeight, 0, 0);// 隐藏}break;default:break;}return super.onTouchEvent(ev);}private String getCurrentTime() {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");String currentTime = format.format(new Date());return currentTime;}private void initArrowAnim() {//初始化箭头动画animUp = new RotateAnimation(0, -180, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);animUp.setDuration(500);animUp.setFillAfter(true);//保持状态//箭头向下动画animDown = new RotateAnimation(-180, 0, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);animDown.setDuration(500);animDown.setFillAfter(true);}/*** 刷新下拉控件的布局*/private void refreshState() {switch (mCurrrentState) {case STATE_PULL_REFRESH:tvTitle.setText("下拉刷新");ivArrow.setVisibility(View.VISIBLE);pbProgress.setVisibility(View.INVISIBLE);ivArrow.startAnimation(animDown);break;case STATE_RELEASE_REFRESH:tvTitle.setText("松开刷新");ivArrow.setVisibility(View.VISIBLE);pbProgress.setVisibility(View.INVISIBLE);ivArrow.startAnimation(animUp);break;case STATE_REFRESHING:tvTitle.setText("正在刷新...");ivArrow.clearAnimation();// 必须先清除动画,才能隐藏ivArrow.setVisibility(View.INVISIBLE);pbProgress.setVisibility(View.VISIBLE);if (mListener != null) {mListener.onRefreash();}break;default:break;}}OnRefreashListener mListener;public void setOnRefreashListener(OnRefreashListener listener) {mListener = listener;}public interface OnRefreashListener {void onRefreash();void onLoadMore();}/*** 收起下拉刷新的控件*/public void onRefreashComplete() {if (isLoadingMOre) {footerView.setPadding(0, -mFooterViewHeight, 0, 0);//隐藏脚布局isLoadingMOre = false;} else {mCurrrentState = STATE_PULL_REFRESH;tvTitle.setText("下拉刷新");ivArrow.setVisibility(View.VISIBLE);pbProgress.setVisibility(View.INVISIBLE);mHeaderView.setPadding(0, -measuredHeight, 0, 0);//隐藏}}public void noFooterView() {footerView.setPadding(0, mFooterViewHeight, 0, 0);//隐藏脚布局}}
代码中引用RefreashListView
package com.itguang.dell_pc.myapplication.base;import android.app.Activity;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.text.TextUtils;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import com.google.gson.Gson;import com.itguang.dell_pc.myapplication.R;import com.itguang.dell_pc.myapplication.domain.NewsData;import com.itguang.dell_pc.myapplication.domain.TabData;import com.itguang.dell_pc.myapplication.globe.GlobeContents;import com.itguang.dell_pc.myapplication.view.RefreshListView;import com.lidroid.xutils.BitmapUtils;import com.lidroid.xutils.HttpUtils;import com.lidroid.xutils.ViewUtils;import com.lidroid.xutils.exception.HttpException;import com.lidroid.xutils.http.ResponseInfo;import com.lidroid.xutils.http.callback.RequestCallBack;import com.lidroid.xutils.http.client.HttpRequest;import com.lidroid.xutils.view.annotation.ViewInject;import com.viewpagerindicator.CirclePageIndicator;import java.util.ArrayList;/*** 作者: 小光哥 on 2016/4/22.* 邮箱: 1445037803@qq.com* 修订历史:* 描述:* ┏┓ ┏┓* ┏┛┻━━━┛┻┓━━━━┻┓* ┃ ┃* ┃ ━ ┃* ┃ ＞ ＜ ┃* ┃ ┃* ┃... ⌒ ... ┃* ┃ ┃* ┗━┓ ┏━┛* ┃ ┃ Code is far away from bug with the animal protecting* ┃ 史 ┃ 神兽保佑,代码无bug* ┃ 诗 ┃* ┃ 之 ┃* ┃ 宠 ┃* ┃ ┃* ┃ ┗━━━┓* ┃BUG天敌 ┣┓┣┓┣┓┣┓┣┓* ┃ ┏┛* ┗┓┓┏━┳┓┏┛* ┃┫┫ ┃┫┫* ┗┻┛ ┗┻┛*//*** 也签详情页*/public class TabDetailPager extends BaseMenuDetailPager implements ViewPager.OnPageChangeListener {/*** @param activity* @param newsTabData*/NewsData.NewsTabData mTabdata;private String mUrl;private TabData mTabDetailData;@ViewInject(R.id.vp_news)private ViewPager mViewPager;@ViewInject(R.id.lv_newslist)private RefreshListView newsListView;//新闻列表@ViewInject(R.id.tv_title)private TextView tvTitle;//新闻标题@ViewInject(R.id.indicator)private CirclePageIndicator indicator;//头条新闻指示器private ArrayList<TabData.TopNewsData> mTopNewsList;//新闻数据集合private int[] images;private ArrayList<TabData.TabNewsData> mNewsList;//新闻数据集合private String mMoreUrl;private NewsAdapter mNewsAdapter;public TabDetailPager(Activity activity, NewsData.NewsTabData newsTabData) {super(activity);mTabdata = newsTabData;mUrl = GlobeContents.SERVER_URL + mTabdata.url;}@Overridepublic View initViews() {images = new int[]{R.drawable.topnews1, R.drawable.topnews21, R.drawable.topnews31, R.drawable.topimage};View view = View.inflate(mActivity, R.layout.tab_detail_pager, null);View headerView = View.inflate(mActivity, R.layout.list_header_topnews, null);//加载头布局// TextView tvTitle = (TextView) view.findViewById(R.id.tv_title);//事件注入ViewUtils.inject(this, view);ViewUtils.inject(this, headerView);mViewPager.addOnPageChangeListener(this);//将肥头条新闻以头布局形式加载到listView中newsListView.addHeaderView(headerView);//设置下拉刷新监听newsListView.setOnRefreashListener(new RefreshListView.OnRefreashListener() {@Overridepublic void onRefreash() {getDataFromServer();}@Overridepublic void onLoadMore() {if (mMoreUrl != null) {getMoreDataFromServer();} else {Toast.makeText(mActivity, "没有更多数据了", Toast.LENGTH_SHORT).show();newsListView.onRefreashComplete();// newsListView.noFooterView();}}});return view;}@Overridepublic void initData() {getDataFromServer();//这是一个异步的,}private void getDataFromServer() {HttpUtils utils = new HttpUtils();utils.send(HttpRequest.HttpMethod.GET, mUrl, new RequestCallBack<String>() {@Overridepublic void onSuccess(ResponseInfo<String> responseInfo) {String result = (String) responseInfo.result;// System.out.println("页签详情页返回结果:+++++++++++++++++++" + result);praseData(result, false);newsListView.onRefreashComplete();}@Overridepublic void onFailure(HttpException e, String s) {Toast.makeText(mActivity, "获取Tabdetaildata失败!", Toast.LENGTH_SHORT).show();// error.printStackTrace();}});}/*** 加载下一页数据*/private void getMoreDataFromServer() {HttpUtils utils = new HttpUtils();utils.send(HttpRequest.HttpMethod.GET, mMoreUrl, new RequestCallBack<String>() {@Overridepublic void onSuccess(ResponseInfo<String> responseInfo) {String result = (String) responseInfo.result;// System.out.println("页签详情页返回结果:+++++++++++++++++++" + result);praseData(result, true);newsListView.onRefreashComplete();}@Overridepublic void onFailure(HttpException e, String s) {Toast.makeText(mActivity, "获取Tabdetaildata失败!", Toast.LENGTH_SHORT).show();// error.printStackTrace();}});}/*** 把json字符串解析成为json对象** @param result 要解析的的json字符串*/private void praseData(String result, boolean isLoadMore) {Gson gson = new Gson();mTabDetailData = gson.fromJson(result, TabData.class);//返回TabData对象System.out.println("页签详情页:+++++++++++++++++++++" + mTabdata);//处理更多页面的逻辑final String more = mTabDetailData.data.more;if (!TextUtils.isEmpty(more)) {mMoreUrl = GlobeContents.SERVER_URL + more;} else {mMoreUrl = null;}if (!isLoadMore) {mTopNewsList = mTabDetailData.data.topnews;mNewsList = mTabDetailData.data.news;if (mTopNewsList != null) {mViewPager.setAdapter(new TopNewsAdapter());indicator.setOnPageChangeListener(this);indicator.setViewPager(mViewPager);//在设置完适配器后,在设置指示器indicator.setSnap(true);//设置快照显示indicator.onPageSelected(0);//indicator会自作聪明,离开时会记录当前位置tvTitle.setText(mTopNewsList.get(0).title);}mNewsAdapter = new NewsAdapter();//填充新闻列表if (mNewsList != null) {newsListView.setAdapter(mNewsAdapter);}} else {//如果是加载下一页,需要将数据追加给原来的集合ArrayList<TabData.TabNewsData> news = mTabDetailData.data.news;mNewsList.addAll(news);mNewsAdapter.notifyDataSetChanged();//刷新ListView}}@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}@Overridepublic void onPageSelected(int position) {//更新头条新闻标题TabData.TopNewsData topNewsData = mTopNewsList.get(position);tvTitle.setText(topNewsData.title);}@Overridepublic void onPageScrollStateChanged(int state) {}/*** ListView适配器*/class NewsAdapter extends BaseAdapter {private final BitmapUtils utils;NewsAdapter() {utils = new BitmapUtils(mActivity);utils.configDefaultLoadingImage(R.drawable.pic_item_list_default);}@Overridepublic int getCount() {return mNewsList.size();}@Overridepublic Object getItem(int position) {return mNewsList.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder holder;if (convertView == null) {convertView = View.inflate(mActivity, R.layout.list_news_item, null);holder = new ViewHolder();holder.ivPic = (ImageView) convertView.findViewById(R.id.iv_pic);holder.tvTitle = (TextView) convertView.findViewById(R.id.tv_title);holder.tvDate = (TextView) convertView.findViewById(R.id.tv_date);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}TabData.TabNewsData item = (TabData.TabNewsData) getItem(position);holder.tvTitle.setText(item.title);holder.tvDate.setText(item.pubdate);utils.display(holder.ivPic, item.listimage);return convertView;}}static class ViewHolder {public TextView tvTitle;public TextView tvDate;public ImageView ivPic;}/*** Viewpager适配器*/class TopNewsAdapter extends PagerAdapter {private BitmapUtils bitmapUtils;TopNewsAdapter() {bitmapUtils = new BitmapUtils(mActivity);bitmapUtils.configDefaultLoadingImage(R.drawable.topnews_item_default);//设置默认图片}@Overridepublic int getCount() {return mTabDetailData.data.topnews.size();}@Overridepublic boolean isViewFromObject(View view, Object object) {return view == object;}@Overridepublic Object instantiateItem(ViewGroup container, int position) {ImageView imageView = new ImageView(mActivity);imageView.setImageResource(images[position]);imageView.setScaleType(ImageView.ScaleType.FIT_XY);//基于控件大小填充图片// TabData.TopNewsData topNewsData = mTopNewsList.get(position);// bitmapUtils.display(imageView,mTabDetailData.data.topnews.get(position).url);container.addView(imageView);return imageView;}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {container.removeView((View) object);}}}
以上所述是小编给大家介绍的ListView实现下拉刷新加载更多的实例代码(直接拿来用)的全部叙述，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的，在此也非常感谢大家对网站的支持！
发现一种久违的感动。
