ExpandableListView
有这样的json数组[\"city\":\"changsha\",\"street\":\"no2\"},{\"city\":\"beijing\",\"street\":\"no5\"]，传到第二个activity中，将streety对应的数据显示到组上面，将street和city对应的数据显示在相应的组下面。效果图：
布局文件：
activity_q.xml
activity_main.xml
group.xml
android:id ="@+id/uselistGroup1"
QActivity.java
package com.example.m;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.json.JSONArray;
import org.json.JSONObject;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class QActivity extends Activity {
private Button button;
private List> list;
String result="[{\"city\":\"changsha\",\"street\":\"no2\"},{\"city\":\"beijing\",\"street\":\"no5\"}]";
//String result="[{\"child\":\"changsha\"},{\"child\":\"beijing\"}]";
@SuppressWarnings("unchecked")
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_q);
this.button=(Button)findViewById(R.id.button);
button.setOnClickListener(new buttonClick());
String result1="{\"address\":"+result+"}";
Log.d("result1",result1);
try{
JSONObject json=new JSONObject(result1);
JSONArray jsonlist=json.getJSONArray("address");
list = new ArrayList>();
list=JsonHelper.toList(jsonlist);
Log.d("list***",list.toString());
}
catch(Exception e){
}
}
class buttonClick implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent=new Intent(QActivity.this,MainActivity.class);
intent.putExtra("list", (Serializable)list);
QActivity.this.startActivity(intent);
Log.d("list",(Serializable)list+"");
}
}
}
package com.example.m;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.SimpleExpandableListAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
ExpandableListView act;
List> groups;
List>> childs;
SimpleExpandableListAdapter sla;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
act = (ExpandableListView)findViewById(R.id.list);
Intent intent=getIntent();
groups = (List>)intent.getSerializableExtra("list");
// Map group1 = new HashMap();
// group1.put("group", "group1");
// Map group2 = new HashMap();
// group2.put("group", "group2");
// groups.add(group1);
// groups.add(group2);
List>> childs = new ArrayList>>();
for(int i=0;i> child1 = new ArrayList>();
Map childdata = new HashMap();
childdata=groups.get(i);
child1.add(childdata);
Log.d("child1",child1.toString());
childs.add(child1);
}
// List> child1 = (List>)intent.getSerializableExtra("list");
// Map childData1 = new HashMap();
// childData1.put("child", "child1Data1");
// Map childData2 = new HashMap();
// childData2.put("child", "child1Data2");
// child1.add(childData1);
// child1.add(childData2);
// List> child2 = (List>)intent.getSerializableExtra("list");
// Map child2Data1 = new HashMap();
// child2Data1.put("child", "child2Data1");
// Map child2Data2 = new HashMap();
// child2Data2.put("child", "child2Data2");
// child2.add(child2Data1);
// child2.add(child2Data2);
// childs = new ArrayList>>();
// childs.add(child1);
// childs.add(child2);
//生成对象
//1.context
//2.一级条目数据
//3.用来设置一级条目样式的布局文件
//4.指定一级条目数据的Key
//5.指定一级条目数据显示的group控件id
//6.指定二级条目数据
//7.用来设置二级条目样式的布局文件
//8.指定二级条目数据的key
//9.指定二级条目数据显示的控件的id
sla = new SimpleExpandableListAdapter
(this, groups, R.layout.group, new String[]{"street"}, new int[]{R.id.uselistGroup1},
childs, R.layout.child, new String[]{"city","street"}, new int[]{R.id.childId,R.id.childId00});
act.setAdapter(sla);
System.out.println("act.getChildCount():"+act.getCount());;
for (int i = 0; i < sla.getGroupCount(); i++) {
System.out.println("i:"+i);
act.expandGroup(i);
}
//设置为null则去掉箭头
// act.setGroupIndicator(null);
//子节点的监听事件
act.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
public boolean onChildClick(ExpandableListView expandableListView, View view, int i, int i1, long l) {
System.out.println("i:"+i+" i1:"+i1+" l:"+l);
HashMap m = (HashMap) sla.getChild(i, i1);
System.out.println("m:"+m);
Toast.makeText(MainActivity.this, (CharSequence) m.get("street"), Toast.LENGTH_SHORT).show();
Intent intent=new Intent();
intent.setClass(MainActivity.this,BillActivity.class);
MainActivity.this.startActivity(intent);
// String albumid = (String) m.get(NAME);
// Toast.makeText(Main.this, albumid, Toast.LENGTH_SHORT).show();
return false; //todo
}
});
//父节点的监听事件
act.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
System.out.println("v:"+v);
return false;
}
});
}
// public void expandClick(View v){
// Map group1 = new HashMap();
// group1.put("group", "group3");
// groups.add(group1);
// List> child1 = new ArrayList>();
// Map childData1 = new HashMap();
// childData1.put("child", "child3Data1");
// Map childData2 = new HashMap();
// childData2.put("child", "child3Data2");
// child1.add(childData1);
// child1.add(childData2);
// childs.add(child1);
//
// Map childData = new HashMap();
// childData.put("child", "child1Data22");
// childs.get(1).add(childData);
// sla.notifyDataSetChanged();
// System.out.println("===:"+sla.getGroupCount());
// }
} 下面这段也可以用来写
childs = new ArrayList>>();
for(int i=0;i> child1 = new ArrayList>();
Map childdata = new HashMap();
childdata=groups.get(i);
child1.add(childdata);
Log.d("child1",child1.toString());
childs.add(child1);
去掉默认的展开收缩箭头 act.setGroupIndicator(null); 使用自己自定义的图片 在drawable中加入两张图片 在layout中新建一个xml文档expandlist.xml