数据的显示listView使用

效果图

1、先定义item

　　

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="horizontal"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content">
  <TextView
  android:layout_width="80dip"
  android:layout_height="wrap_content"
  android:id="@+id/personid"
  />
  <TextView
  android:layout_width="100dip"
  android:layout_height="wrap_content"
  android:id="@+id/name"
  />
  <TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:id="@+id/amount"
  />
</LinearLayout>

2、通过适配器把数据绑定到listview中，点击某一行数据显示编号

　　方式一：

　　

 List<HashMap<String, Object>> data=new ArrayList<HashMap<String,Object>>();
        for(Person person :persons){
            HashMap<String, Object> hashMap=new HashMap<String, Object>();
            hashMap.put("id", person.getPersonId());
            hashMap.put("name", person.getName());
            hashMap.put("amount", person.getAmount());
            data.add(hashMap);
        }

 SimpleAdapter adapter=new SimpleAdapter(this,data,R.layout.item,new String[]{"id","name","amount"},new int[]{R.id.personid,R.id.name,R.id.amount});
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new OnItemClickListener(){
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                ListView myListView=(ListView)parent;
                HashMap<String, Object> item=(HashMap<String, Object>)myListView.getItemAtPosition(position);
                Toast.makeText(DBActivity.this, item.get("id").toString() , Toast.LENGTH_SHORT).show();
            }
            
        });

方式二：用游标的方式

Cursor cursor=personService.getCursor(0, 15);
        //要求字段中要有_id  设计表的时候的主键为_id
        SimpleCursorAdapter cursorAdapter=new SimpleCursorAdapter(this,R.layout.item,cursor,new String[]{"_id","name","amount"},new int[]{R.id.personid,R.id.name,R.id.amount});
        listView.setAdapter(cursorAdapter);
        listView.setOnItemClickListener(new OnItemClickListener(){

            /**
             * parent当前所点击的listview对象
             * view当前所点击的条目
             */
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                ListView myListView=(ListView)parent;
                Cursor data=(Cursor)myListView.getItemAtPosition(position);//根据位置移动游标
                int m=data.getInt(data.getColumnIndex("_id"));
                Toast.makeText(DBActivity.this, String.valueOf(m) , Toast.LENGTH_SHORT).show();
            }
            
        });