Android采用ListView实现数据列表显示

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>数据类型）

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

main.xml

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 List persons = 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 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 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"