ExpandableListView可手动添加简单分组功能

ExpandableListView实现简单分组功能

点击打开链接

/article/10586485.html

java代码

package com.xiaoke.expandablelistview;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.SimpleExpandableListAdapter;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener {
private final String GROUP = "group";
private final String CHILD = "child";
private ArrayList<HashMap<String, Object>> data;
private MyExpand mExpandableListAdapter =null;
private EditText etGroup=null;
private EditText etChild=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
data = new ArrayList<HashMap<String, Object>>();

// 创建分组的信息
String[] strGroup = { "A", "B", "C", "D", "E" };
for (int i = 0; i < strGroup.length; i++) {
HashMap<String, Object> map = new HashMap<String, Object>();
map.put(GROUP, strGroup[i]);
ArrayList<String> temp = new ArrayList<String>();
for (int j = 0; j < 5; j++) {
temp.add("数据" + j);
}
map.put(CHILD, temp);
data.add(map);
}
etGroup=(EditText) findViewById(R.id.et_group_id);
etChild=(EditText) findViewById(R.id.et_child_id);
Button btnGroup;
btnGroup=(Button) findViewById(R.id.btn_group_id);
btnGroup.setOnClickListener(this);
btnGroup=(Button) findViewById(R.id.btn_child_id);
btnGroup.setOnClickListener(this);

// 获取ExpandableListView对象
ExpandableListView elv = (ExpandableListView) findViewById(R.id.expandableListView);
//设置箭头符号不显示
elv.setGroupIndicator(null);
// 加载adapter，注意参数的对应
mExpandableListAdapter = new MyExpand(this, null,
0, 0, null, null, null, 0, 0, null, null);
elv.setAdapter(mExpandableListAdapter);
// // 演示
//
// // 展开0组
// elv.expandGroup(0);
// // 收起1组
// elv.collapseGroup(1);
// // 展开2组
// elv.expandGroup(2);
// 添加点击事件，点击打开或者关闭分组
elv.setOnGroupClickListener(new OnGroupClickListener() {

@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
// TODO Auto-generated method stub
return false;
}
});

}
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.btn_group_id:
createGroup(etGroup.getText().toString());
//注意，数据更新后要跟新界面，不然显示不变
mExpandableListAdapter.notifyDataSetChanged();
break;
case R.id.btn_child_id:
if(!etChild.getText().toString().equals("")){
creatChild(Integer.parseInt(etChild.getText().toString()));
mExpandableListAdapter.notifyDataSetChanged();
}
break;
}

}
public void createGroup(String str){
HashMap<String, Object> map = new HashMap<String, Object>();
map.put(GROUP, str);
ArrayList<String> temp = new ArrayList<String>();
for (int j = 0; j < 5; j++) {
temp.add("数据" + j);
}
map.put(CHILD, temp);
data.add(map);
}
public void creatChild(int tempInt){
ArrayList<String> listTemp= (ArrayList<String>) data.get(1).get(CHILD);
listTemp.add(""+tempInt);
}

// /*
// * 重写6个方法
// * getGroup：返回对应位置的组的参数
// * getGroupCount：返回分了多少组
// * getGroupView：显示组
// * getChild：返回每组的成员
// * getChildCount：返回每组成员的个数
// * getChildView ： 显示每组成员
// */

public class MyExpand extends SimpleExpandableListAdapter {
private LayoutInflater inflater = null;

// 构造方法中实例化LayoutInflater对象
public MyExpand(Context context,
List<? extends Map<String, ?>> groupData,
int expandedGroupLayout, int collapsedGroupLayout,
String[] groupFrom, int[] groupTo,
List<? extends List<? extends Map<String, ?>>> childData,
int childLayout, int lastChildLayout, String[] childFrom,
int[] childTo) {
super(context, groupData, expandedGroupLayout,
collapsedGroupLayout, groupFrom, groupTo, childData,
childLayout, lastChildLayout, childFrom, childTo);
// TODO Auto-generated constructor stub
// 两个方法实例化LayoutInflater对象
inflater = LayoutInflater.from(context);
// inflater=(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}

@Override
public Object getChild(int groupPosition, int childPosition) {
ArrayList<String> items = (ArrayList<String>) data.get(
groupPosition).get(CHILD);
return items.get(childPosition);
}

@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
View view = inflater.inflate(android.R.layout.simple_list_item_1,
null);
TextView text = (TextView) view.findViewById(android.R.id.text1);
text.setText(getChild(groupPosition, childPosition) + "");
return view;
}

@Override
public int getChildrenCount(int groupPosition) {
ArrayList<String> items = (ArrayList<String>) data.get(
groupPosition).get(CHILD);
return items.size();
}

@Override
public Object getGroup(int groupPosition) {

return data.get(groupPosition).get(GROUP);
}

@Override
public int getGroupCount() {

return data.size();
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
View view = inflater.inflate(android.R.layout.simple_list_item_1,
null);
TextView text = (TextView) view.findViewById(android.R.id.text1);
text.setText(getGroup(groupPosition) + "");
view.setBackgroundColor(Color.RED);
return view;
}

}

}

xml布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

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

<EditText
android:id="@+id/et_group_id"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:singleLine="true" />

<Button
android:id="@+id/btn_group_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="添加组"
android:textSize="15sp" />

<EditText
android:id="@+id/et_child_id"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:singleLine="true" />

<Button
android:id="@+id/btn_child_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="添加成员"
android:textSize="15sp" />
</LinearLayout>

<ExpandableListView
android:id="@+id/expandableListView"
android:layout_width="match_parent"
android:layout_height="match_parent" />

</LinearLayout>