今天移动开发课程验收完成，可以小小的松一口气了，感觉在同学中，自己做的这个计步器还是挺不错的嘛~~
然后对原来的手机计步器（pedometer）项目又做了一些完善：
https://github.com/296777513/pedometer
先给出ExpandableListView的一些效果图
先给出ExpandableListViewAdapter的代码：
package com.bit.expandablelistview;
import java.util.HashMap;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;
public class ExpandableListViewAdapter extends BaseExpandableListAdapter {
private List<String> group;//这是组视图
private HashMap<String, List<User>> child;//这是子视图
private ExpandableListView listView;//当选择另一个组视图时关闭当前打开的组视图
private LayoutInflater inflater;//加载布局文件
private int last;//判断是否打开当前的页面
public ExpandableListViewAdapter(Context context, List<String> group,
HashMap<String, List<User>> child, ExpandableListView listView) {
this.group = group;
this.child = child;
this.listView = listView;
this.inflater = LayoutInflater.from(context);
}
/**
* 对外提供一个借口，当数据改变时调用这个函数
* @param group
* @param child
*/
public void setOnDataChanged(List<String> group,
HashMap<String, List<User>> child) {
this.group = group;
this.child = child;
this.notifyDataSetChanged();
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return group.size();
}
@Override
public int getChildrenCount(int groupPosition) {
List<User> tempList = child.get(group.get(groupPosition));
if (tempList != null) {
return tempList.size();
} else {
return 0;
}
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return group.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return child.get(group.get(groupPosition)).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@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 false;
}
/**
* 得到组视图布局文件，对这个进行了优化，可以看到converView是一个Android提供的缓存的对象，如果第一次没有这个布局文件
* 就创建一个，如果有的话，直接从convertView得到，不用进行创建，减少内存开销
*/
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String groupName = group.get(groupPosition);
View view;
TextView name;
if (convertView == null) {
view = inflater.inflate(R.layout.group_item, null);
name = (TextView) view.findViewById(R.id.group_number);
view.setTag(name);
} else {
view = convertView;
name = (TextView) view.getTag();
}
name.setText(groupName);
return view;
}
private class ViewHolder {
ImageView picture;
TextView name;
}
/**
* 得到子视图的布局文件，类似于组视图
*/
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
User user = child.get(group.get(groupPosition)).get(childPosition);
View view;
ViewHolder viewHolder;
if (convertView == null) {
view = inflater.inflate(R.layout.child_item, null);
viewHolder = new ViewHolder();
viewHolder.picture = (ImageView) view.findViewById(R.id.pic);
viewHolder.name = (TextView) view.findViewById(R.id.child_name);
view.setTag(viewHolder);
} else {
view = convertView;
viewHolder = (ViewHolder) view.getTag();
}
viewHolder.name.setText(user.getName());
viewHolder.picture.setImageResource(user.getPicture());
return view;
}
/**
* 设置可以点击子视图
*/
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
@Override
public void onGroupExpanded(int groupPosition) {
super.onGroupExpanded(groupPosition);
if (groupPosition != last) {
listView.collapseGroup(last);
}
last = groupPosition;
}
}
然后给出MainActivity类的代码
package com.bit.expandablelistview;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.Toast;
public class MainActivity extends Activity implements OnChildClickListener {
private List<String> group;//这是组视图
private HashMap<String, List<User>> child;//这是子视图
private ExpandableListView listView;//这是可以扩展的listview
private ExpandableListViewAdapter adapter;
//这是子视图要加载的所有图片
private int pic[] = new int[] { R.drawable.head1, R.drawable.head2,
R.drawable.head3, R.drawable.head4, R.drawable.head5,
R.drawable.head6, R.drawable.head7, R.drawable.head8,
R.drawable.head9, R.drawable.head10 };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
prepareData();
showData();
}
/**
* 显示数据
*/
private void showData() {
if (adapter == null) {
adapter = new ExpandableListViewAdapter(this, group, child,
listView);
listView.setAdapter(adapter);
} else {
adapter.setOnDataChanged(group, child);
}
}
/**
* 初始化一些参数，设置监听事件
*/
private void init() {
group = new ArrayList<String>();
child = new HashMap<String, List<User>>();
listView = (ExpandableListView) findViewById(R.id.expandlistview);
listView.setOnChildClickListener(this);
}
/**
* 准备测试数据
*/
private void prepareData() {
group.add("第一组");
group.add("第二组");
group.add("第三组");
List<User> users = new ArrayList<User>();
for (int i = 0; i < 4; i++) {
User user = new User();
user.setName("张全蛋" + i);
user.setPicture(pic[i]);
users.add(user);
}
child.put(group.get(0), users);
users = new ArrayList<User>();
for (int i = 4; i < 7; i++) {
User user = new User();
user.setName("李铁柱" + i);
user.setPicture(pic[i]);
users.add(user);
}
child.put(group.get(1), users);
users = new ArrayList<User>();
for (int i = 7; i < 10; i++) {
User user = new User();
user.setName("唐马儒" + i);
user.setPicture(pic[i]);
users.add(user);
}
child.put(group.get(2), users);
}
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
//点击显示当前子视图的位置
Toast.makeText(
MainActivity.this,
"你点击的是"
+ child.get(group.get(groupPosition))
.get(childPosition).getName(),
Toast.LENGTH_SHORT).show();
return false;
}
}
大家注意，其中的User类是自己定义的一个类。
给出了一个简单实现的demo(0分下载)：
http://download.csdn.net/detail/a296777513/8362613