下拉刷新+加载更多的ListView(直接拿来用)

偏执的太偏执、 2022-07-20 12:29 106阅读 0赞

## 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;
    
        @Override
        public 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();
    
                    }
    
                }
    
    
            }
        }
    
        @Override
        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
    
        }
    
        @Override
        public 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padding
                        mHeaderView.setPadding(0, padding, 0, 0);//设置当前padding
    
                        if (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;
    
        }
    
        @Override
        public 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() {
                @Override
                public void onRefreash() {
                    getDataFromServer();
                }
    
                @Override
                public 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;
        }
    
        @Override
        public 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>() {
    
    
                @Override
                public 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();
                }
    
                @Override
                public 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>() {
    
    
                @Override
                public 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();
                }
    
                @Override
                public 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
            }
    
        }
    
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    
        }
    
        @Override
        public void onPageSelected(int position) {
       //更新头条新闻标题
            TabData.TopNewsData topNewsData = mTopNewsList.get(position);
            tvTitle.setText(topNewsData.title);
    
        }
    
        @Override
        public 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);
    
            }
    
            @Override
            public int getCount() {
                return mNewsList.size();
            }
    
            @Override
            public Object getItem(int position) {
                return mNewsList.get(position);
            }
    
            @Override
            public long getItemId(int position) {
                return position;
            }
    
            @Override
            public 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
            }
    
            @Override
            public int getCount() {
                return mTabDetailData.data.topnews.size();
            }
    
            @Override
            public boolean isViewFromObject(View view, Object object) {
                return view == object;
            }
    
            @Override
            public 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;
            }
    
            @Override
            public void destroyItem(ViewGroup container, int position, Object object) {
                container.removeView((View) object);
            }
        }
    }