您可能需要将自定义列表视图与自定义数组适配器一起使用。例如参考这个link 。
内容:
Android HelloListView (http://developer.android.com/resources/tutorials/views/hello-listview.html) 教程展示了如何将 ListView 绑定到字符串对象数组,但您可能很快就会适应这种情况。这篇文章将向您展示如何将 ListView 绑定到自定义对象的 ArrayList,以及创建多行 ListView。
假设您有某种搜索功能,可以返回人员列表以及地址和电话号码。我们将为每个结果以三个格式化的行显示该数据,并使其可点击。
首先,创建新的 Android 项目,并创建两个布局文件。默认情况下可能已经创建了 Main.xml,因此请将其粘贴到:
<?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">
<TextView
android:layout_height="wrap_content"
android:text="Custom ListView Contents"
android:gravity="center_vertical|center_horizontal"
android:layout_width="fill_parent" />
<ListView
android:id="@+id/ListView01"
android:layout_height="wrap_content"
android:layout_width="fill_parent"/>
</LinearLayout>
接下来,创建一个名为 custom_row_view.xml 的布局文件。此布局将成为 ListView 中每一行的模板。您可以使用几乎任何类型的布局 - 相对、表格等,但为此我们将只使用线性:
<?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">
<TextView android:id="@+id/name"
android:textSize="14sp"
android:textStyle="bold"
android:textColor="#FFFF00"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView android:id="@+id/cityState"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView android:id="@+id/phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
现在,添加一个名为 SearchResults 的对象。将此代码粘贴到:
public class SearchResults {
private String name = "";
private String cityState = "";
private String phone = "";
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setCityState(String cityState) {
this.cityState = cityState;
}
public String getCityState() {
return cityState;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getPhone() {
return phone;
}
}
这是我们将填充数据并加载到 ArrayList 中的类。
接下来,您需要一个自定义适配器。这只是扩展了 BaseAdapter,但如果您愿意,可以扩展 ArrayAdapter。
public class MyCustomBaseAdapter extends BaseAdapter {
private static ArrayList<SearchResults> searchArrayList;
private LayoutInflater mInflater;
public MyCustomBaseAdapter(Context context, ArrayList<SearchResults> results) {
searchArrayList = results;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return searchArrayList.size();
}
public Object getItem(int position) {
return searchArrayList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.custom_row_view, null);
holder = new ViewHolder();
holder.txtName = (TextView) convertView.findViewById(R.id.name);
holder.txtCityState = (TextView) convertView.findViewById(R.id.cityState);
holder.txtPhone = (TextView) convertView.findViewById(R.id.phone);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.txtName.setText(searchArrayList.get(position).getName());
holder.txtCityState.setText(searchArrayList.get(position).getCityState());
holder.txtPhone.setText(searchArrayList.get(position).getPhone());
return convertView;
}
static class ViewHolder {
TextView txtName;
TextView txtCityState;
TextView txtPhone;
}
}
(这个和List14.java API demo基本一样)
最后,我们将它们全部连接到主类文件中:
public class CustomListView extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<SearchResults> searchResults = GetSearchResults();
final ListView lv1 = (ListView) findViewById(R.id.ListView01);
lv1.setAdapter(new MyCustomBaseAdapter(this, searchResults));
lv1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
Object o = lv1.getItemAtPosition(position);
SearchResults fullObject = (SearchResults)o;
Toast.makeText(ListViewBlogPost.this, "You have chosen: " + " " + fullObject.getName(), Toast.LENGTH_LONG).show();
}
});
}
private ArrayList<SearchResults> GetSearchResults(){
ArrayList<SearchResults> results = new ArrayList<SearchResults>();
SearchResults sr1 = new SearchResults();
sr1.setName("John Smith");
sr1.setCityState("Dallas, TX");
sr1.setPhone("214-555-1234");
results.add(sr1);
sr1 = new SearchResults();
sr1.setName("Jane Doe");
sr1.setCityState("Atlanta, GA");
sr1.setPhone("469-555-2587");
results.add(sr1);
sr1 = new SearchResults();
sr1.setName("Steve Young");
sr1.setCityState("Miami, FL");
sr1.setPhone("305-555-7895");
results.add(sr1);
sr1 = new SearchResults();
sr1.setName("Fred Jones");
sr1.setCityState("Las Vegas, NV");
sr1.setPhone("612-555-8214");
results.add(sr1);
return results;
}
}
请注意,我们首先获取 SearchResults 对象的 ArrayList(通常这将来自外部数据源...),将其传递给自定义适配器,然后设置点击侦听器。侦听器获取被点击的项目,将其转换回 SearchResults 对象,然后做它需要做的任何事情。