安卓开发中ListView的用法

ListView的用法
步骤：
1.添加ListView
2.添加item的Layout：list_item_layout.xml
3.数据项
4.添加适配器BaseAdapter

private class MyListAdapter extends BaseAdapter
{
	//要重写BaseAdapter的各种方法
}

( a ) 创建控件

if (convertView == null)
{
	convertView = getLayoutInflater()
		.inflate(R.layout.list_item_layout,parent,false);
}

( b ) 获取数据

Student data = (Student) getItem(position);

( c ) 显示数据

TextView textView = (TextView) convertView.getViewById(R.id.id_textview);
textView.setText(data.name);
ImageView imageView = (ImageView) convertView.findViewById(R.id.id_imageview);
if (sex)
{
	imageView.setImageDrawable(icons[1]);
}
else
{
	imageView.setImageDrawable(icons[0]);
}

5.初始化ListView
( a ) 准备数据

listData.add(new Student("小王",true));   //男生

( b ) 准备数据适配器

MyListAdapter myListAdapter = new MyListAdapter();

( c ) 获取ListView

ListView listView = (ListView) findViewById(R.id.id_listview);
listView.setAdapter(myListAdapter);