Android采用ListView实现数据列表显示1-使用SimpleCursorAdapter进行数据绑定

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<HashMap<String, Object>>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：





[b]界面布局:[/b]

item.xml

<?xml version="1.0" encoding="utf-8"?>

<!--item -->

<LinearLayout

xmlns:Android="http://schemas.android.com/apk/res/android"

android:orientation="horizontal"

android:layout_width="fill_parent"

android:layout_height="fill_parent">

<!-- 名称 -->

<TextView

android:layout_width="130dp"

android:layout_height="wrap_content"

android:id="@+id/name"

/>

<!-- 电话 -->

<TextView

android:layout_width="150dp"

android:layout_height="wrap_content"

android:id="@+id/phone"

/>

<!-- 存款11 -->

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:id="@+id/amount"

/>

</LinearLayout>

main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<!-- 标题 -->

<LinearLayout

android:orientation="horizontal"

android:layout_width="fill_parent"

android:layout_height="wrap_content">

<TextView

android:layout_width="130dp"

android:layout_height="wrap_content"

android:text="姓名"

/>

<TextView

android:layout_width="150dp"

android:layout_height="wrap_content"

android:text="电话"

/>

<TextView

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="存款"

/>

</LinearLayout>

<!-- ListView控件 -->

<ListView

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:id="@+id/listView"

/>

</LinearLayout>

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<Person> persons = service.getScrollData(0, 10);

List<HashMap<String, Object>> data = new ArrayList<HashMap<String,Object>>();

for(Person person : persons){

HashMap<String, Object> item = new HashMap<String, Object>();

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<String, Object> data = (HashMap<String, Object>) 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"

转自：http://www.linuxidc.com/Linux/2011-09/43938.htm