Android 想在ArrayAdapter使用我自己的布局吗
我使用以下代码将ArrayAdapter用于我的ListView:Android 想在ArrayAdapter使用我自己的布局吗,android,Android,我使用以下代码将ArrayAdapter用于我的ListView: ArrayList<String> mylist = new ArrayList<String>(); String xml = ParseXMLMethods.getXML(); Document doc = ParseXMLMethods.XMLfromString(xml); NodeList children = doc.getElementsByTagName(KEY
ArrayList<String> mylist = new ArrayList<String>();
String xml = ParseXMLMethods.getXML();
Document doc = ParseXMLMethods.XMLfromString(xml);
NodeList children = doc.getElementsByTagName(KEY_ITEM);
for (int i = 0; i < children.getLength(); i++) {
Element e = (Element)children.item(i);
mylist.add(ParseXMLMethods.getValue(e, KEY_TITLE));
mylist.add(ParseXMLMethods.getValue(e, KEY_CITY));
mylist.add(ParseXMLMethods.getValue(e, KEY_COUNT));
}
adapter1=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
mylist);
list2.setAdapter(adapter1);
如何使用此布局?您需要查看自定义ListView适配器。请注意,原始代码使用的是自定义ListView,而不是适配器。您需要创建自己的适配器来扩展ArrayAdapter,因为ListView行比一个TextView更复杂 见和 例: list_row.xml
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TableRow>
<ImageView
android:id="@+id/img"
android:layout_width="50dp"
android:layout_height="50dp"/>
<TextView
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="50dp" />
</TableRow>
</TableLayout>
CustomList.java
public class CustomList extends ArrayAdapter<String>{
private final Activity context;
private final String[] web;
private final Integer[] imageId;
public CustomList(Activity context, String[] web, Integer[] imageId) {
super(context, R.layout.list_single, web);
this.context = context;
this.web = web;
this.imageId = imageId;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View rowView= inflater.inflate(R.layout.list_row, null, true);
TextView txtTitle = (TextView) rowView.findViewById(R.id.txt);
ImageView imageView = (ImageView) rowView.findViewById(R.id.img);
txtTitle.setText(web[position]);
imageView.setImageResource(imageId[position]);
return rowView;
}
}
公共类CustomList扩展了ArrayAdapter{
私人最终活动背景;
私有最终字符串[]web;
私有最终整数[]imageId;
公共自定义列表(活动上下文、字符串[]web、整数[]imageId){
super(上下文、R.layout.list_single、web);
this.context=上下文;
this.web=web;
this.imageId=imageId;
}
@凌驾
公共视图getView(内部位置、视图视图、视图组父视图){
LayoutInflater充气器=上下文。getLayoutInflater();
视图行视图=充气机。充气(R.layout.list_行,null,true);
TextView txtTitle=(TextView)rowView.findViewById(R.id.txt);
ImageView ImageView=(ImageView)rowView.findViewById(R.id.img);
setxt(web[位置]);
setImageResource(imageId[位置]);
返回行视图;
}
}
在上面的示例中,您需要切换出ImageView并用文本视图替换它。我已经使用了上述方法,但问题是,每当我在主活动页面调用此自定义适配器时,它都需要KEY_TITLE、KEY_CITY、KEY_COUNT的数组。XML解析后无法获取此字符串数组。在这种情况下,您的问题似乎也与XML解析有关。紧跟在最后一个
语句之后的mylist
ArrayList是什么样子的?它是否确实包含了您要查找的内容?其次,如果您有一个复杂的ListView(即多个TextView),则不能简单地使用基本ArrayAdapter。您还必须创建一个自定义适配器。
public class CustomList extends ArrayAdapter<String>{
private final Activity context;
private final String[] web;
private final Integer[] imageId;
public CustomList(Activity context, String[] web, Integer[] imageId) {
super(context, R.layout.list_single, web);
this.context = context;
this.web = web;
this.imageId = imageId;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View rowView= inflater.inflate(R.layout.list_row, null, true);
TextView txtTitle = (TextView) rowView.findViewById(R.id.txt);
ImageView imageView = (ImageView) rowView.findViewById(R.id.img);
txtTitle.setText(web[position]);
imageView.setImageResource(imageId[position]);
return rowView;
}
}