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