Android列表加载更多数据，并实现点赞

http://blog.csdn.net/u013009808/article/details/53166103
上一篇地址
对我上一篇文章进行了修改
可以点击加载更多条数据
并且实现点击功能
主要修改代码：

MainActivity

package com.gz.test_listview;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.util.Log;import android.view.View;import android.widget.AbsListView;import android.widget.AdapterView;import android.widget.Button;import android.widget.ListView;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class MainActivity extends Activity implements AbsListView.OnScrollListener,View.OnClickListener{    private int visibleLastIndex = 0;   //最后的可视项索引    private int visibleItemCount;       // 当前窗口可见项总数    private Button load_more;    private View footView;    MainActivityAdapter adapter;    private ListView listview;    //测试数据    private String[] title = {"商用","家用","测试","多联","空气能","商用","家用","测试","多联","空气能"};    private String[] praise = {"3","1","0","0","0","3","1","0","0","0"};    private String[] step = {"0","0","0","1","1","0","0","0","1","0"};    //将数据传回adapter中    private List<Map<String,Object>> map = new ArrayList<Map<String, Object>>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //加载更多控件        footView = getLayoutInflater().inflate(R.layout.footview,null);        load_more = (Button) footView.findViewById(R.id.load_more);        //初始化Adapter        initAdapter();        listview.addFooterView(footView);        //加载更多的点击事件        load_more.setOnClickListener(this);        listview.setOnScrollListener(this);        listview.setAdapter(adapter);        listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                Intent intent = new Intent(MainActivity.this,DetailActivity.class);                startActivity(intent);            }        });    }    //初始化Adapter，并为初始化的十条数据赋值    private void initAdapter() {//        Log.e("gz/initAdapter","进入initAdapter()方法");        listview = (ListView) findViewById(R.id.listview);        for(int i=0;i<10;i++){            Map<String,Object> item = new HashMap<String,Object>();            item.put("title",title[i]);            item.put("praise",praise[i]);            item.put("step",step[i]);            map.add(item);        }        adapter = new MainActivityAdapter(this,map);    }    //加载更多数据每次增加十条数据    private void loadData() {//        Log.e("gz/loadData","进入loadData()方法");        int count = adapter.getCount();        for(int i=count;i<count+10;i++){            Map<String,Object> item = new HashMap<String,Object>();            item.put("title",title[i-count]);            item.put("praise",praise[i-count]);            item.put("step",step[i-count]);            adapter.addItem(item);            adapter.notifyDataSetChanged();        }    }    @Override    public void onClick(View v) {            load_more.setText("加载中");            Handler handler = new Handler();            handler.postDelayed(new Runnable() {                @Override                public void run() {                    loadData();                    adapter.notifyDataSetChanged();                    listview.setSelection(visibleLastIndex);                    load_more.setText("加载更多");                }            },2000);    }    //滑动事件    @Override    public void onScrollStateChanged(AbsListView view, int scrollState) {        int itemsLastIndex = adapter.getCount() - 1;    //数据集最后一项的索引        int lastIndex = itemsLastIndex + 1;             //加上底部的loadMoreView项        if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE && visibleLastIndex == lastIndex) {            //如果是自动加载,可以在这里放置异步加载数据的代码//            Log.e("gz/onScrollStateChanged", "loading...");        }    }    @Override    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {        this.visibleItemCount = visibleItemCount;        visibleLastIndex = firstVisibleItem + visibleItemCount - 1;//        Log.e("gz/onScroll","进入onScroll()");    }}

MainAdapter

package com.gz.test_listview;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * Created by 390778 on 2016/11/9. */public class MainActivityAdapter extends BaseAdapter{    private ViewHolder holder;    private Context context;    private List<Bean> praise_step_num = new ArrayList<Bean>();    private LayoutInflater inflater;    List<Map<String,Object>> listItems;    /*    根据position，保存点击的是哪一行数据，默认为false，点击后改为true    */    private Map<Integer, Boolean> isExist = new HashMap<Integer, Boolean>();    public MainActivityAdapter(Context context,List<Map<String,Object>> listItems){        this.context = context;        this.listItems = listItems;        inflater = LayoutInflater.from(context);        Log.i("listItem",listItems.toString());        init();    }    private void init() {        /*        为相应的数据赋值，所有的数据存储在listItems中        position一一对应每一行数据         */        for (int i = 0;i<listItems.size();i++){            isExist.put(i,false);            Bean b = new Bean();            Integer praise = Integer.parseInt(listItems.get(i).get("praise").toString());            b.setPraise(praise);            Integer step = Integer.parseInt(listItems.get(i).get("step").toString());            b.setStep(step);            praise_step_num.add(i,b);            Log.i("praise_step",praise_step_num.get(i).getPraise()+"");        }    }    @Override    public int getCount() {//        Log.e("gz/getCount","进入getCount()方法");        return listItems.size() ;    }    @Override    public Object getItem(int position) {//        Log.e("gz/getItem","进入getItem()方法");        return position;    }    @Override    public long getItemId(int position) {//        Log.e("gz/getItemId","进入getItemId()方法");        return position;    }    @Override    public View getView(final int position, View convertView, ViewGroup parent) {//        Log.e("gz/getView","进入getView()方法");        //获取赞、踩得值        final Bean bean = praise_step_num.get(position);        if(convertView == null){            holder = new ViewHolder();            convertView = inflater.inflate(R.layout.item_praise,null);            holder.img_praise = (ImageView) convertView.findViewById(R.id.tv_praises_img);            holder.img_step = (ImageView) convertView.findViewById(R.id.tv_step_img);            holder.praise = (TextView) convertView.findViewById(R.id.tv_praises);            holder.step = (TextView) convertView.findViewById(R.id.tv_step);            holder.title = (TextView) convertView.findViewById(R.id.tv_name);            convertView.setTag(holder);        }else{            holder = (ViewHolder) convertView.getTag();        }        holder.praise.setText(bean.getPraise()+"");        holder.step.setText(bean.getStep()+"");        holder.title.setText(listItems.get(position).get("title")+"");         /**              每次会复用convertView,            convertView没有被赋值，就会使用之后赋值的数据，             比如：点击了第一行数据赞的按钮，相应的第一行点赞图片变为红色             当向下滑动页面时，下方的也会有一项数据发生变化，复用            在这里为每次重用赋值             */        if(bean.getPraise()!=0){            holder.img_praise.setImageResource(R.drawable.good);        }else{            holder.img_praise.setImageResource(R.drawable.good_no);        }        if(bean.getStep()!=0){            holder.img_step.setImageResource(R.drawable.bad);        }else{            holder.img_step.setImageResource(R.drawable.bad_no);        }        holder.img_praise.setOnClickListener(new imgClick(position,bean));        return convertView;    }    class imgClick implements View.OnClickListener {        private int position;        private Bean bean;        public imgClick(int position,Bean bean){            this.position = position;            this.bean = bean;        }        @Override        public void onClick(final View v) {            Log.i("position",position+"");            if(bean.getPraise()==0){                if(isExist.get(position) == false){                    final Handler handler = new Handler() {                        @Override                        public void handleMessage(Message msg) {                            super.handleMessage(msg);                            switch (msg.what){                                case 1:                                    ImageView btn = (ImageView) v;                                    if(v.getId() == btn.getId()) {                                        isExist.put(position, true);                                        bean.setPraise(bean.getPraise()+1);                                        btn.setImageResource(R.drawable.good);                                        AnimationTools.scale(btn);                                        Log.i("isExist",isExist.toString()+"");                                        notifyDataSetChanged();                                        break;                                    }                                case 2:                                    Toast.makeText(context, "失败", Toast.LENGTH_LONG).show();                                    break;                            }                        }                    };                    new Thread(){                        @Override                        public void run() {                            Message msg = new Message();                            msg.what=1;                            handler.sendMessage(msg);                        }                    }.start();                }            }else{                Toast.makeText(context, "已经点击过", Toast.LENGTH_LONG).show();            }        }    }    //增加listview项    public void addItem(Map<String,Object> item){        listItems.add(item);        for (int i = listItems.size()-10;i<listItems.size();i++){            isExist.put(i,false);            Bean b = new Bean();            Integer praise = Integer.parseInt(listItems.get(i).get("praise").toString());            b.setPraise(praise);            Integer step = Integer.parseInt(listItems.get(i).get("step").toString());            b.setStep(step);            praise_step_num.add(i,b);        }    }    private static class ViewHolder{        public ImageView img_praise;        private ImageView img_step;        public TextView praise;        private TextView step;        private TextView title;    }    class Bean{        public int getPraise() {            return praise;        }        public void setPraise(int praise) {            this.praise = praise;        }        public int getStep() {            return step;        }        public void setStep(int step) {            this.step = step;        }        private int praise;        private int step;    }}

代码下载地址：
http://download.csdn.net/detail/u013009808/9683937
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