ListView滚动翻页,Radiobutton实现单选

import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class EditAdapter extends BaseAdapter {
    // 定义一个LayoutInflater来导入资源文件用
    LayoutInflater inflater;
    // 用来接收要绑定的数据
    List<HashMap<String, Object>> aList;
    // 要绑定的资源文件id
    int resID;
    private int temp = -1;
    Activity activity;
     HashMap<String,Boolean> states=new HashMap<String,Boolean>();

    public EditAdapter(Context context, List<HashMap<String, Object>> aList,
            int resId) {
        this.inflater = LayoutInflater.from(context);
        this.aList = aList;
        this.resID = resId;
        activity= (Activity)context;
    }

    // 绑定的数据的长度，也就是ListView项的个数
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return this.aList.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {


        Eholder holder;
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.editpersonitem, null);
            holder = new Eholder();


            // setTag方法用来设置与视图关联的标签，我的理解就是把和它相关的ViewHolder存储起来，到用的时候再拿出来
            convertView.setTag(holder);
        } else {
            // 如果不为null就直接通过getTag取出来
            holder = (Eholder) convertView.getTag();
        }
        holder.itemview = (ImageView) convertView.findViewById(R.id.imgperson);
        final RadioButton radio=(RadioButton) convertView.findViewById(R.id.rdoperdson);
        holder.radiobutton = radio;
        // 人物照片
        // 图片网络路径
        String imageUrl = this.aList.get(position).get("PhotoUrl").toString();
        // 图片本地路径
        String imageName = this.aList.get(position).get("PhotoName").toString();

        // 缩略图在本地的路径
        Bitmap imageBitmap = Utility.getLoacalBitmap(imageName);
        // 如果本地有保存
        if (imageBitmap != null) {
            holder.itemview.setImageBitmap(imageBitmap);

        } else {// 如果本地没有保存

            imageBitmap = Utility.getNetBitmap(imageUrl);
            if (imageBitmap != null) {

                Utility.SaveImage(imageBitmap, imageName);

                holder.itemview.setImageBitmap(imageBitmap);

            }

        }

        // RadioButton
        holder.radiobutton.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                Toast.makeText(activity.getApplicationContext(), "选中的是第"+position+"条记录", 0).show();

                //重置，确保最多只有一项被选中
                for(String key:states.keySet()){
                    states.put(key, false);

                }
                states.put(String.valueOf(position), radio.isChecked());
                EditAdapter.this.notifyDataSetChanged();
            }
        });

        boolean res=false;
        if(states.get(String.valueOf(position)) == null || states.get(String.valueOf(position))== false){
            res=false;
            states.put(String.valueOf(position), false);
        }
        else
            res=true;

        holder.radiobutton.setChecked(res);
        return convertView;



    }

    /**
     * 添加数据列表项
     *
     * @param newsitem
     */
    public void addNewsItem(List<HashMap<String, Object>> newItem) {
        for (int i = 0; i < newItem.size(); i++) {
            aList.add(newItem.get(i));
        }
    }

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONObject;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RadioButton;
import android.widget.Toast;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView.OnItemClickListener;

public class EditPerson extends Activity implements OnScrollListener {

    private EditAdapter adapter = null;
    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 int datasize = 0; // 数据集的条数
    private Boolean isOver = false;
    private Handler handler = new Handler();
    private ListView lv;
    private ArrayList<String> imageNames = new ArrayList<String>();
    private String useridstring;
    private String imagePath = Environment.getExternalStorageDirectory()
    + "/DCIM/Camera/";
    private String photoDate;
    //private ProgressDialog progressDialog = null;

    List<HashMap<String, Object>> aList = null;
    private ProgressBar circleProgressBar;
    //弹出窗口
    AlertDialog.Builder dialog = null;
    //每滚动一页显示多少条数据
    private String pageSize = "5";
    //第几页
    private int pageIndex = 1;


    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.editperson);

        //"上一步"按钮
        Button btnBack = (Button) findViewById(R.id.btnBack);
        //"新增"按钮
        Button btnAdd = (Button) findViewById(R.id.btnAdd);
        //"覆盖"按钮
        Button btnRe = (Button) findViewById(R.id.btnRe);

        //点"上一步"按钮跳转到之前有搜索数据的搜索页面，不重新加载,并销毁此页
        btnBack.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                finish();
            }
        });

        dialog = new AlertDialog.Builder(this);

        // 获得前面的activity传来的参数
        Bundle bundle = new Bundle();
        bundle = this.getIntent().getExtras();
        // userid的字符串
        useridstring = bundle.getString("Userid");

        // 照片Base64的字符串
        photoDate = bundle.getString("photoString");

        // 操作ProgressBar控件
        circleProgressBar = (ProgressBar) findViewById(R.id.circleProgressBar);
        circleProgressBar.setVisibility(View.VISIBLE);
        circleProgressBar.setProgress(0);

        lv = (ListView) findViewById(R.id.lvPerson);

        // 启动一个后台线程
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {

                aList = getData("1",pageSize,useridstring);

                if (aList == null) {

                    // 提示没有数据
                    dialog.setTitle("提示");
                    dialog.setMessage("无相关照片！");
                    dialog.setPositiveButton("确定", null);
                    dialog.show();

                } else {

                    // 这里下载数据
                    adapter = new EditAdapter(EditPerson.this, aList,
                            R.layout.recognitionitem);
                    lv.setAdapter(adapter);

                }

                circleProgressBar.setVisibility(View.GONE);
            }
        }, 2000);

        lv.setOnScrollListener(this);

        // 点"新增"按钮,存储图片到云端，保存到数据库
        btnAdd.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // 保存用户信息
                if (!IsSave()) {

                    return;

                }


                dialog.setTitle("提示");
                dialog.setMessage("新增成功！");
                dialog.setPositiveButton("确定",new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog,
                            int which) {
                        Intent intent = new Intent(EditPerson.this,
                                Camera.class);
                        startActivity(intent);
                    }
                });
                dialog.show();
            }
        });

        // 点"覆盖"按钮,先删除本地手机上缓存里的照片，存储图片到云端，保存缩略图到数据库
        btnRe.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            //通过RADIOBUTTON按钮取得图片名称
                String strPicName="";
                for (int i = 0, j = lv.getCount(); i < j; i++) {
                    /*View child = lv.getChildAt(i);
                    RadioButton rdobtn = (RadioButton) child.findViewById(R.id.rdoperdson);
                    if (rdobtn.isChecked()) {
                        strPicName = aList.get(i).get("PicName").toString();
                    }*/
                    if (adapter.states.get(String.valueOf(i))==true)
                    {
                        strPicName = aList.get(i).get("PicName").toString();
                    }
                }
                if(strPicName=="")
                {
                    dialog.setTitle("提示");
                    dialog.setMessage("请选择");
                    dialog.setPositiveButton("确定", null);
                    dialog.show();
                    return;
                }
                if(!IsCover(strPicName)){
                    return;
                }

                dialog.setTitle("提示");
                dialog.setMessage("覆盖成功！");
                dialog.setPositiveButton("确定",new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog,
                            int which) {
                        Intent intent = new Intent(EditPerson.this,
                                Camera.class);
                        startActivity(intent);
                    }
                });
                dialog.show();




            }
        });
    }
    //保存图片
    private boolean IsSave() {
        // TODO Auto-generated method stub

        //progressDialog = ProgressDialog.show(SaveUserInfo.this, "请稍等...", "获取数据中...", true);




        CallWS callWS = new CallWS();
        String saveResult = callWS.AddUserPic(photoDate, useridstring);

        if (saveResult.equals("-1")) {

            //progressDialog.dismiss();

            Alert("保存失败！");

            return false;

        }

        //progressDialog.dismiss();

        return true;

    }
    //覆盖图片
    private boolean IsCover(String strPicName) {
        // TODO Auto-generated method stub

        //progressDialog = ProgressDialog.show(SaveUserInfo.this, "请稍等...", "获取数据中...", true);




        //先删除本地手机上缓存里的照片
        // 缩略图在本地的路径
        File file  = new File(imagePath+strPicName+ "_thumbnail.jpg");
        //原始图在本地路径
        File filenew  = new File(imagePath+strPicName+ ".jpg");
        // 如果本地有保存，删除
        if (file != null) {
            file.delete();

        }
        // 如果本地有保存原始图，删除
        if (filenew != null) {
            filenew.delete();

        }

        CallWS callWS = new CallWS();
        String saveResult = callWS.CoverUserPic(photoDate, useridstring,strPicName);

        if (saveResult.equals("-1")) {

            //progressDialog.dismiss();

            Alert("保存失败！");

            return false;

        }

        //progressDialog.dismiss();

        return true;

    }

    // 定义一个生成数据的方法,因为HashMap的键对应的值可能是String或者是资源的ID，所以这里用的是HashMap<String,
    // Object>
    private List<HashMap<String, Object>> getData(String pageIndex, String pageSize, String useridstring) {

        try {

            List<HashMap<String, Object>> aList = new ArrayList<HashMap<String, Object>>();

            // 获得识别的图片列表
            CallWS callWS = new CallWS();
            String photoInfos = callWS.GetPhotoListByUserid(pageIndex,pageSize,useridstring);

            // String photoInfos=
            // "{\"code\":1,\"totalNum\":1,\"data\":[{\"URL\":\"http://192.169.0.8/webServices1/Photo//03521501-EA4D-4962-B12F-618A3A39F43B_3.jpg\",\"face\":\"\",\"imageName\":\"240E7856-C2F7-4381-B9B1-AE8F3A787890_1\",\"similiar\":0.8389}]}";

            if (photoInfos==null || photoInfos.length() == 0) {

                return null;

            }

            JSONObject obj = new JSONObject(photoInfos);
            String returnCode = obj.get("code").toString();
            if (returnCode.equals("-1")) {
                return null;
            }

            datasize = Integer.parseInt(obj.get("total").toString());

            JSONArray numberList = obj.getJSONArray("data");
            for (int i = 0; i < numberList.length(); i++) {
                // System.out.println(numberList.getJSONObject(i).getString("name"));
                HashMap<String, Object> map = new HashMap<String, Object>();
                String PhotoName = numberList.getJSONObject(i).getString(
                "PhotoName");
                String PhotoUrl = numberList.getJSONObject(i).getString(
                "PhotoUrl");
                String strid = numberList.getJSONObject(i).getString("ID");

                map.put("PhotoUrl", PhotoUrl);
                map.put("id", strid);
                map.put("PhotoName", imagePath+PhotoName+ "_thumbnail.jpg");
                map.put("PicName", PhotoName);
                aList.add(map);

                imageNames.add(numberList.getJSONObject(i).getString(
                        "PhotoName"));
            }

            return aList;

        } catch (Exception e) {

            return null;

        }

    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem,
            int visibleItemCounts, int totalItemCount) {
        // TODO Auto-generated method stub
        visibleItemCount = visibleItemCounts;
        visibleLastIndex = firstVisibleItem + visibleItemCount;

        // 如果所有的记录选项等于数据集的条数，则移除列表底部视图
        if (totalItemCount >= datasize&& datasize > 0) {
            /*
             * listView.removeFooterView(loadMoreView); Toast.makeText(this,
             * "数据全部加载完!", Toast.LENGTH_LONG).show();
             */
            isOver = true;

        }

    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        // 数据集最后一项的索引
        int itemsLastIndex = adapter.getCount() - 1;
        int lastIndex = itemsLastIndex + 1;
        if (scrollState == OnScrollListener.SCROLL_STATE_IDLE
                && visibleLastIndex == lastIndex && !isOver) {

            // 如果是自动加载,可以在这里放置异步加载数据的代码
            // lv.addFooterView(btnMore); //设置列表底部视图

            // btnMore.setText("正在加载中..."); // 设置按钮文字

            circleProgressBar.setVisibility(View.VISIBLE);
            circleProgressBar.setProgress(0);

            handler.postDelayed(new Runnable() {

                @Override
                public void run() {
                    loadMoreData();
                    adapter.notifyDataSetChanged();
                    circleProgressBar.setVisibility(View.GONE);

                    // btnMore.setText("查看更多..."); // 恢复按钮文字
                    // lv.removeFooterView(btnMore);
                }
            }, 2000);

        }
    }

    private void Alert(String info) {

        dialog.setTitle("提示");
        dialog.setMessage(info);
        dialog.setPositiveButton("确定", null);
        dialog.show();

    }
    /**
     * 加载更多数据
     */
    private boolean loadMoreData() {
        // 获得当前页面的页数
        pageIndex++;

        List<HashMap<String, Object>> aList = getData(Integer.toString(pageIndex),
                pageSize, useridstring);

        if (aList == null) {
            pageIndex--;
            return false;

        }

        adapter.addNewsItem(aList);

        return true;

    }

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal">

<ProgressBar android:layout_width="wrap_content"
        android:id="@+id/circleProgressBar" android:layout_height="wrap_content"></ProgressBar>

    <ListView
        android:id="@+id/lvPerson"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/linearLayout1"
        android:layout_alignParentTop="true">

    </ListView>
    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true">

        <Button
            android:id="@+id/btnBack"
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:text="上一步" />

        <Button
            android:id="@+id/btnAdd"
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:text="新增" />

        <Button
            android:id="@+id/btnRe"
            android:layout_width="90dp"
            android:layout_height="wrap_content"
            android:text="覆盖" />

    </LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">

   <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/imgperson"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginLeft="20dip" />

    <RadioButton
        android:id="@+id/rdoperdson"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="100dip"/>

     </LinearLayout>

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