我正在开发一个将 JSON 从 url 解析到 ExpandableListView 的项目。根据“状态”标签值( Activity 或待定),将相应地将记录放置到不同的组“Activity ”和“待定”。一切正常。
我的问题是,当我点击第二组中的一个 child 时,它应该显示不同的数据,但我得到的数据是第一组 child 的数据。
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ExpandableListActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.ListView;
import android.widget.SimpleExpandableListAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ExpandableListView.OnGroupClickListener;
public class ExpandableActivity1 extends ExpandableListActivity {
JSONArray jArray = null;
JSONObject json_data = null;
TextView txtMLSID;
List<Map<String, String>> child1;
List<Map<String, String>> child2;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
List<Map<String, String>> groups = new ArrayList<Map<String, String>>();
Map<String, String> group1 = new HashMap<String, String>();
group1.put("group", " Active");
groups.add(group1);
Map<String, String> group2 = new HashMap<String, String>();
group2.put("group", " Pending");
groups.add(group2);
child1 = new ArrayList<Map<String, String>>();
child2 = new ArrayList<Map<String, String>>();
String url ="http://stage.realtylog.net/iPhone/functions.php?username=hussain16&act=listing";
String json = JSONfunctions.getJSONfromURL(url);
try{
jArray = new JSONArray(json);
for(int i=0;i<jArray.length() ;i++){
Map<String, String> childdata1 = new HashMap<String, String>();
JSONObject e = jArray.getJSONObject(i);
String status = e.getString("2");
Log.e("log_tag","Status: "+status);
if (status.contains("active")){
Log.e("log_tag","StatusActive: "+status);
childdata1.put("0", String.valueOf(i+1)+" "+ e.getString("mlsid"));
child1.add(childdata1);
}else if(status.contains("pending")){
Log.e("log_tag","StatusPending: "+status);
Map<String, String> childdata2= new HashMap<String, String>();
childdata2.put("0", String.valueOf(i+1)+" "+ e.getString("mlsid"));
child2.add(childdata2);
}
}
}catch(JSONException e) {
Log.e("log_tag", "Error parsing data "+e.toString());
}
List<List<Map<String, String>>> childs = new ArrayList<List<Map<String, String>>>();
childs.add(child1);
childs.add(child2);
SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter(
this, groups, R.layout.groups, new String[] { "group" },
new int[] { R.id.group }, childs, R.layout.childs,
new String[] { "0"}, new int[] { R.id.child });
setListAdapter(adapter);
}
@Override
public boolean setSelectedChild(int groupPosition, int childPosition,
boolean shouldExpandGroup) {
//do something
Log.e("log_tag","setSelectedChild: ");
return super.setSelectedChild(groupPosition, childPosition,
shouldExpandGroup);
}
@Override
public void setSelectedGroup(int groupPosition) {
//do something
Log.e("log_tag","setSelectedGroup: ");
super.setSelectedGroup(groupPosition);
}
**//Here I am Getting problem**
@SuppressWarnings("unchecked")
public boolean onChildClick(
ExpandableListView parent,
View v,
int groupPosition,
int childPosition,
long id) {
Log.d( "LOG_TAG", "onChildClick: "+"GROUP: "+groupPosition+" CHILD Position: "+ childPosition);
HashMap<String, String> o = (HashMap<String, String>) parent.getItemAtPosition(childPosition+1);
String val = o.get("0");
Log.d( "LOG_TAG", "selected value : "+val );
return false;
}
}
调用 public boolean onChildClick () 时的 LogCat 信息:
10-20 11:24:28.004: DEBUG/LOG_TAG(1652): onChildClick: GROUP: 0 CHILD Position: 0
10-20 11:24:28.004: DEBUG/LOG_TAG(1652): selected value : 1 555
10-20 11:24:42.454: DEBUG/LOG_TAG(1652): onChildClick: GROUP: 1 CHILD Position: 0
10-20 11:24:42.454: DEBUG/LOG_TAG(1652): selected value : 1 555
Logcat 显示我为 group1(Active) 和 group2(Pending) 获得了相同的值
我需要基于点击的每个 subview 的特定值。
最佳答案
您必须使用 Adapter 的 getChild(groupPosition, childPosition)
方法来检索 child 的实例并将其转换为您的 Map 并使其正常工作。
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Toast.makeText(this, (String)((Map<String, String>)
adapter.getChild(groupPosition, childPosition)).get("lalit"),
Toast.LENGTH_LONG).show();
return super.onChildClick(parent, v, groupPosition, childPosition, id);
}
关于android - 如何从android中的expandablelistview获取onChildClick值?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7831943/