【发布时间】：2014-11-04 23:27:07
【问题描述】：
我在从动态布局呈现 ListView 时遇到了一些问题。我不知道为什么 getView 只在位置 0 和多次被调用！
我在互联网和 stackoverflow 上进行了搜索，但找不到合适的答案。
我实际上正在尝试对此进行演示：http://www.framentos.com/en/android-tutorial/2012/07/16/listview-in-android-using-custom-listadapter-and-viewcache/
值得注意的是，我的主布局文件被滚动条包围。
主活动布局文件：
<ListView
android:id="@+id/city_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/questionsList"
android:paddingTop="20sp" >
</ListView>
我的列表视图布局文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="80dip" >
<ImageView
android:id="@+id/ImageCity"
android:layout_width="90sp"
android:layout_height="90sp" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_toRightOf="@id/ImageCity"
android:orientation="vertical"
android:paddingLeft="10sp">
<TextView
android:id="@+id/cityName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="25sp" />
<TextView
android:id="@+id/cityLinkWiki"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:autoLink="web"
android:textSize="15sp" />
</LinearLayout>
</RelativeLayout>
适配器类：
import com.incidentreport.app.classes.objects.City;
public class CityListAdapter extends ArrayAdapter{
private int resource;
private LayoutInflater inflater;
private Context context;
public CityListAdapter ( Context ctx, int resourceId, List objects) {
super( ctx, resourceId, objects );
resource = resourceId;
inflater = LayoutInflater.from( ctx );
context=ctx;
}
@Override
public View getView ( int position, View convertView, ViewGroup parent ) {
Log.v("adapter", "pos: " + position + "#" + resource);
/* create a new view of my layout and inflate it in the row */
convertView = ( RelativeLayout ) inflater.inflate( resource, null );
/* Extract the city's object to show */
City city = (City)getItem( position );
/* Take the TextView from layout and set the city's name */
TextView txtName = (TextView) convertView.findViewById(R.id.cityName);
txtName.setText(city.getName());
/* Take the TextView from layout and set the city's wiki link */
TextView txtWiki = (TextView) convertView.findViewById(R.id.cityLinkWiki);
txtWiki.setText(city.getUrlWiki());
/* Take the ImageView from layout and set the city's image */
ImageView imageCity = (ImageView) convertView.findViewById(R.id.ImageCity);
return convertView;
}
}
主要活动代码片段：
List listCity= new ArrayList();
listCity.add(new City("London","http://en.wikipedia.org/wiki/London","london"));
listCity.add(new City("Rome","http://en.wikipedia.org/wiki/Rome","rome"));
listCity.add(new City("Paris","http://en.wikipedia.org/wiki/Paris","paris"));
ListView listViewCity = ( ListView ) findViewById( R.id.city_list);
listViewCity.setAdapter( new CityListAdapter(this, R.layout.layout_city, listCity ) );
【问题讨论】：
-
使用 ViewHolder 模式。使用
inflater.inflate( resource, parent,false);。 -
Notably, my main layout file is surrounded by scrollbar.。 ?你的意思是？然后展示它。 -
@Raghunandan 我试过这个.. 现在 getView 只被调用一次，但它应该在不同的位置被调用 3 次