Android开发之ListView排序

下面是activity:

 public class MainActivity extends Activity {

     private ListView mListView = null;
     private List<TestDate> mList = null;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         mListView = (ListView) this.findViewById(R.id.main_listView);
         mList = new ArrayList<TestDate>();
         initData();
         Collections.sort(mList, new Comparator<TestDate>() {
             /**
              *
              * @param lhs
              * @param rhs
              * @return an integer < 0 if lhs is less than rhs, 0 if they are
              *         equal, and > 0 if lhs is greater than rhs,比较数据大小时,这里比的是时间
              */
             @Override
             public int compare(TestDate lhs, TestDate rhs) {
                 Date date1 = DateUtil.stringToDate(lhs.getDate());
                 Date date2 = DateUtil.stringToDate(rhs.getDate());
                 // 对日期字段进行升序，如果欲降序可采用after方法
                 if (date1.before(date2)) {
                     return 1;
                 }
                 return -1;
             }
         });
         mListView.setAdapter(new MyAdapter(this, mList));
     }

     private void initData() {
         mList.add(new TestDate("2012-12-12 12:30", "zhangsan"));
         mList.add(new TestDate("2012-12-12 10:20", "lisi"));
         mList.add(new TestDate("2012-12-11 10:21", "lisi"));
         mList.add(new TestDate("2012-12-11 10:20", "lisi"));
         mList.add(new TestDate("2012-12-13 01:03", "wangwu"));
         mList.add(new TestDate("2012-12-10 02:04", "zhaoliu"));
         mList.add(new TestDate("2012-12-15 23:00", "tianqi"));
         mList.add(new TestDate("2012-11-12 22:30", "wangwu"));
         mList.add(new TestDate("2012-12-17 08:24", "shimei"));
         mList.add(new TestDate("2012-11-10 11:10", "shisanmei"));
         mList.add(new TestDate("2012-12-18 16:50", "wangan"));
         mList.add(new TestDate("2012-12-19 18:00", "wangjiu"));
         mList.add(new TestDate("2012-12-20 19:30", "wusi"));
         mList.add(new TestDate("2012-12-20 19:30", "wusi"));
     }
 }

下面是工具类：

 public class DateUtil {

     public static Date stringToDate(String dateString) {
         ParsePosition position = new ParsePosition(0);
         SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
         Date dateValue = simpleDateFormat.parse(dateString, position);
         return dateValue;
     }

 }

下面是ListView用的Adapter:

 public class MyAdapter extends BaseAdapter {

     private Context mContext;
     private List<TestDate> mList;

     public MyAdapter(Context context, List<TestDate> list) {
         this.mContext = context;
         this.mList = list;
     }

     @Override
     public int getCount() {
         return mList != null ? mList.size() : 0;
     }

     @Override
     public Object getItem(int position) {
         return mList.get(position);
     }

     @Override
     public long getItemId(int position) {
         return position;
     }

     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
         ViewHolder holder = null;
         if (convertView == null) {
             convertView = (LinearLayout) LayoutInflater.from(mContext).inflate(
                     R.layout.main_item, null);
             holder = new ViewHolder();
             holder.textView1 = (TextView) convertView
                     .findViewById(R.id.item_textView1);
             holder.textVeiw2 = (TextView) convertView
                     .findViewById(R.id.item_textView2);
             convertView.setTag(holder);
         } else {
             holder = (ViewHolder) convertView.getTag();
         }

         holder.textView1.setText(mList.get(position).getDate());
         holder.textVeiw2.setText(mList.get(position).getName());

         return convertView;
     }

     private class ViewHolder {
         private TextView textView1;
         private TextView textVeiw2;
     }

 }

下面是xml文件：

 <RelativeLayout 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" >

     <ListView
         android:id="@+id/main_listView"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_centerHorizontal="true"
         android:layout_centerVertical="true"
         tools:context=".MainActivity" />

 </RelativeLayout>

 

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="horizontal" >

     <TextView
         android:id="@+id/item_textView1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
         android:layout_margin="10dp" />

     <TextView
         android:id="@+id/item_textView2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical" />

 </LinearLayout>

下面是一个JavaBean的类：

 public class TestDate {

     private String date;
     private String name;

     public String getDate() {
         return date;
     }

     public String getName() {
         return name;
     }

     public TestDate(String date, String name) {
         this.date = date;
         this.name = name;
     }

 }