本文实例讲述了Android编程使用ListView实现数据列表显示的方法。分享给大家供大家参考,具体如下:
要将数据库中的数据列表显示在屏幕上,我们要使用ListView这个控件,当用户从数据库中取出数据时,要将数据绑定到显示控件上,如何绑定呢,我们需要创建适配器进行绑定,创建适配器有两种方式:
第一种是用SimpleAdapter创建(要求绑定的数据是List
第二种是用SimpleCursorAdapter创建(要求绑定的数据是Cursor数据类型)
显示效果如图所示:
界面布局:
item.xml
<&#63;xml version="1.0" encoding="utf-8"&#63;>
main.xml
<&#63;xml version="1.0" encoding="utf-8"&#63;>
使用SimpleAdapter进行数据绑定
public class MainActivity extends Activity { private PersonService service; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); service = new PersonService(this); ListView listView = (ListView) this.findViewById(R.id.listView); //获取到集合数据 ListpersOns= service.getScrollData(0, 10); List > data = new ArrayList >(); for(Person person : persons){ HashMap item = new HashMap (); item.put("id", person.getId()); item.put("name", person.getName()); item.put("phone", person.getPhone()); item.put("amount", person.getAmount()); data.add(item); } //创建SimpleAdapter适配器将数据绑定到item显示控件上 SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item, new String[]{"name", "phone", "amount"}, new int[]{R.id.name, R.id.phone, R.id.amount}); //实现列表的显示 listView.setAdapter(adapter); //条目点击事件 listView.setOnItemClickListener(new ItemClickListener()); } //获取点击事件 private final class ItemClickListener implements OnItemClickListener{ public void onItemClick(AdapterView<&#63;> parent, View view, int position, long id) { ListView listView = (ListView) parent; HashMap data = (HashMap ) listView.getItemAtPosition(position); String persOnid= data.get("id").toString(); Toast.makeText(getApplicationContext(), personid, 1).show(); } } }
使用SimpleCursorAdapter进行数据绑定
public class MainActivity extends Activity { private PersonService service; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); service = new PersonService(this); ListView listView = (ListView) this.findViewById(R.id.listView); //获取游标 Cursor cursor = service.getCursorScrollData(0, 10); //创建SimpleCursorAdapter适配器将数据绑定到item显示控件上 SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.item, cursor, new String[]{"name", "phone", "amount"}, new int[]{R.id.name, R.id.phone, R.id.amount}); listView.setAdapter(adapter); //条目点击事件 listView.setOnItemClickListener(new ItemClickListener()); } private final class ItemClickListener implements OnItemClickListener{ public void onItemClick(AdapterView<&#63;> parent, View view, int position, long id) { ListView listView = (ListView) parent; Cursor cursor = (Cursor) listView.getItemAtPosition(position); String persOnid= String.valueOf(cursor.getInt(cursor.getColumnIndex("_id"))); Toast.makeText(getApplicationContext(), personid, 1).show(); } } }
注意:使用第二种方式在获取数据集合时必须指定主键"_id"
希望本文所述对大家Android程序设计有所帮助。