android端获取网络数据添加到二级列表ExpandableListView

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//模拟数据，转换为二维数组格式

public class ExUtils {    /**     * jsonarray格式转成list格式,若为空返回null     * @param array2     * @return     * @throws JSONException     */        private static ArrayList<String> getListValue()                throws JSONException {            ArrayList<String> list = new ArrayList<String>();            for (int i = 0; i < 5; i++) {                String s="xigua"+i;                list.add(s);            }            return list;        }        // ArrayList转成一维数组        private static String[] getArrayValue(ArrayList<String> list2) {            String str[] = new String[0];            if (list2 != null) {                str = list2.toArray(new String[list2.size()]);            }            return str;        }        /**         * 获取子项目方法         *          * @return         */        public static String[][] getItemChild() {            String[] arr1, arr2, arr3;            String[][] arrTwo = null;//          // 从网页获取数据            ArrayList<String> list1, list2, list3;////          HttpClient client = new DefaultHttpClient();//          HttpPost post = new HttpPost(urlPath);            try {//              InputStream responseStream = client.execute(post).getEntity()//                      .getContent();//              // 记得转换成gbk编码//              BufferedReader bufferedReader = new BufferedReader(//                      new InputStreamReader(responseStream, "UTF-8"));//              String webContentString = bufferedReader.readLine();//              // json解析**************************////              JSONObject object = new JSONObject(webContentString);////              JSONArray array1 = object.getJSONArray("item1");//              JSONArray array2 = object.getJSONArray("item2");//              JSONArray array3 = object.getJSONArray("item3");                arrTwo = new String[3][];                // json转成list                list1 = getListValue();                list2 = getListValue();                list3 = getListValue();                // 转成一维数组                arr1 = getArrayValue(list1);                arr2 = getArrayValue(list2);                arr3 = getArrayValue(list3);                // 用arraylis存儲得到的非空list                ArrayList<String[]> list = new ArrayList<String[]>();                if (arr1 != null && arr1.length != 0) {                    list.add(arr1);                }                if (arr2 != null && arr2.length != 0) {                    list.add(arr2);                }                if (arr3 != null && arr3.length != 0) {                    list.add(arr3);                }                // 动态生成二维数组                int count = 0;                for (int i = 0; i < list.size(); i++) {                    arrTwo[count++] = list.get(i);//                  count++;                }                // 测试打印二维数组的每一行//              printOne(arrTwo[0]);//              printOne(arrTwo[1]);//              printOne(arrTwo[2]);//              printTwo(arrTwo);            } catch (Exception e) {                System.out.println("解析子项目出错!");            }            return arrTwo;        }}

//MainActivity中调用，实现二级列表ExpandableListview

package com.example.aa;import com.example.aa.R.string;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.BaseExpandableListAdapter;import android.widget.ExpandableListAdapter;import android.widget.ExpandableListView;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);//      requestWindowFeature(Window.FEATURE_NO_TITLE);      final ExpandableListAdapter adapter = new BaseExpandableListAdapter() {          //设置组视图的图片          int[] logos = new int[] { R.drawable.ic_launcher, R.drawable.ic_launcher,R.drawable.ic_launcher};          //设置组视图的显示文字          private String[] generalsTypes = new String[] { "宝一", "宝二", "宝三" };          //子视图显示文字          /*private String[][] generals = new String[][] {                  { "宝一孩儿1", "宝一孩儿2", "宝一孩儿3", "宝一孩儿4", "宝一孩儿5", "宝一孩儿6" },                  { "宝二孩儿1", "宝二孩儿2", "宝二孩儿3", "宝二孩儿4", "宝二孩儿5", "宝二孩儿6" },                  { "宝三孩儿1", "宝三孩儿2", "宝三孩儿3", "宝三孩儿4", "宝三孩儿5" }          };*/          private String[][] generals=ExUtils.getItemChild();          //子视图图片          public int[][] generallogos = new int[][] {                  { R.drawable.ic_launcher, R.drawable.ic_launcher,                          R.drawable.ic_launcher, R.drawable.ic_launcher,                          R.drawable.ic_launcher, R.drawable.ic_launcher },                  { R.drawable.ic_launcher, R.drawable.ic_launcher,                          R.drawable.ic_launcher, R.drawable.ic_launcher,                          R.drawable.ic_launcher, R.drawable.ic_launcher },                  { R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher,                          R.drawable.ic_launcher, R.drawable.ic_launcher } };          //自己定义一个获得文字信息的方法          TextView getTextView() {              AbsListView.LayoutParams lp = new AbsListView.LayoutParams(                      ViewGroup.LayoutParams.FILL_PARENT, 64);              TextView textView = new TextView(                      MainActivity.this);              textView.setLayoutParams(lp);              textView.setGravity(Gravity.CENTER_VERTICAL);              textView.setPadding(36, 0, 0, 0);              textView.setTextSize(20);              textView.setTextColor(Color.BLACK);              return textView;          }          //重写ExpandableListAdapter中的各个方法          @Override          public int getGroupCount() {              // TODO Auto-generated method stub              return generalsTypes.length;          }          @Override          public Object getGroup(int groupPosition) {              // TODO Auto-generated method stub              return generalsTypes[groupPosition];          }          @Override          public long getGroupId(int groupPosition) {              // TODO Auto-generated method stub              return groupPosition;          }          @Override          public int getChildrenCount(int groupPosition) {              // TODO Auto-generated method stub              return generals[groupPosition].length;          }          @Override          public Object getChild(int groupPosition, int childPosition) {              // TODO Auto-generated method stub              return generals[groupPosition][childPosition];          }          @Override          public long getChildId(int groupPosition, int childPosition) {              // TODO Auto-generated method stub              return childPosition;          }          @Override          public boolean hasStableIds() {              // TODO Auto-generated method stub              return true;          }          @Override          public View getGroupView(int groupPosition, boolean isExpanded,                                   View convertView, ViewGroup parent) {              // TODO Auto-generated method stub              LinearLayout ll = new LinearLayout(                      MainActivity.this);//              ll.setOrientation(0);              ImageView logo = new ImageView(MainActivity.this);              logo.setImageResource(logos[groupPosition]);              logo.setPadding(50, 0, 0, 0);              ll.addView(logo);              TextView textView = getTextView();              textView.setTextColor(Color.BLACK);              textView.setText(getGroup(groupPosition).toString());              ll.addView(textView);              return ll;          }          @Override          public View getChildView(int groupPosition, int childPosition,                                   boolean isLastChild, View convertView, ViewGroup parent) {              // TODO Auto-generated method stub              LinearLayout ll = new LinearLayout(                      MainActivity.this);//              ll.setOrientation(0);              ImageView generallogo = new ImageView(                      MainActivity.this);              generallogo                      .setImageResource(generallogos[groupPosition][childPosition]);              ll.addView(generallogo);              TextView textView = getTextView();              textView.setText(getChild(groupPosition, childPosition)                      .toString());              ll.addView(textView);              return ll;          }          @Override          public boolean isChildSelectable(int groupPosition,                                           int childPosition) {              // TODO Auto-generated method stub              return true;          }      };      ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.list);      expandableListView.setAdapter(adapter);      //设置item点击的监听器      expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {          @Override          public boolean onChildClick(ExpandableListView parent, View v,                                      int groupPosition, int childPosition, long id) {              Toast.makeText(                      MainActivity.this,                      "你点击了" + adapter.getChild(groupPosition, childPosition),                      Toast.LENGTH_SHORT).show();              return false;          }      });  }}感谢博主：http://blog.csdn.net/yhm2046/article/details/8601948

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