如何使用CustomAdapter与XML异步任务的ListView [英] How to use CustomAdapter with ListView from XML Async Task
本文介绍了如何使用CustomAdapter与XML异步任务的ListView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我实现填充的ListView 使用的的StringBuilder 从互联网XML源。
通过这个$ C C ListView的$填充只有一个字符串，但我想填充ListView通过元素： getIdLine 和 getTimeLeft （用 CustomAdapter ）进行自定义列表视图项的布局中分离出来的字符串。
如何实现这一目标？
EDITED code 的
FragmentActivity.class
私人的ListView listViewEMT;
私人的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT; yourList;
... AsyncTask的
保护无效onPostExecute（字符串字符串）{
super.onPostExecute（串）;
CustomAdapter适配器=新CustomAdapter（getActivity（），yourList）;
listViewEMT.setAdapter（适配器）;
this.progressDialog.dismiss（）;
}
/ ** RSS处理程序类* /
类位于RSSHandler扩展的DefaultHandler {
StringBuffer的字符;
私人到达currentArrival;
位于RSSHandler（）{
this.currentArrival = NEW ARRIVAL（）;
this.chars =新的StringBuffer（）;
}
公共无效字符（字符[] ARRC，整数N，INT N2）{
this.chars.append（新的String（ARRC，N，N2））;
}
公共无效的endElement（字符串字符串，字符串字符串2，字符串STRING3）抛出的SAXException {
super.endElement（字符串，字符串2，STRING3）;
如果（（string2.equalsIgnoreCase（idStop））及及（this.currentArrival.getIdStop（）== NULL））{
this.currentArrival.setIdStop（this.chars.toString（））;
}
如果（（string2.equalsIgnoreCase（idLine））及及（this.currentArrival.getIdLinea（）== NULL））{
this.currentArrival.setIdLinea（this.chars.toString（））;
}
如果（（string2.equalsIgnoreCase（TimeLeftBus））及及（this.currentArrival.getTimeLeft（）== 0））{
INT N = Integer.valueOf（（字符串）（this.chars.toString（）））;
this.currentArrival.setTimeLeft（N）;
}
如果收益率（（string2.equalsIgnoreCase（到达））！）;
yourList.add（（＆HashMap中所述;字符串，字符串＆GT）（currentArrival.getMap（）））;
this.currentArrival = NEW ARRIVAL（）;
}
公共无效的startElement（字符串字符串，字符串字符串2，字符串STRING3，org.xml.sax.Attributes属性）抛出的SAXException {
super.startElement（字符串，字符串2，STRING3，属性）;
this.chars =新的StringBuffer（）;
string2.equalsIgnoreCase（到达）;
}
}
Arrival.class
... getter和setter
公众的HashMap＆LT;字符串，字符串＆GT;的GetMap（）{
HashMap的＆LT;字符串，字符串＆GT;地图;
图=新的HashMap＆LT;字符串，字符串＆GT;（）;
//添加每个子节点HashMap中的key =＆GT;值
map.put（KEY1，idLinea）;
map.put（KEY2，将String.valueOf（的timeleft））;
返回地图;
}
CustomAdapter.class 感谢Nabin
公共类CustomAdapter扩展了BaseAdapter {
私人活动的活动;
私人的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;数据;
私有静态LayoutInflater吹气= NULL;
私人列表＆LT;字符串＆GT; listString;
公共CustomAdapter（活动一，ArrayList的＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT; D）{
活性= A;
数据= D;
充气=（LayoutInflater）活动
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
}
@覆盖
公众诠释getCount将（）{
返回0;
}
@覆盖
公共对象的getItem（INT位置）{
返回data.get（位置）;
}
@覆盖
众长getItemId（INT位置）{
返回0;
}
@覆盖
公共查看getView（INT位置，查看convertView，ViewGroup中父）{
查看VI = convertView;
如果（convertView == NULL）
VI = inflater.inflate（R.layout.emt_item，NULL）;
TextView的TV1 =（TextView中）vi.findViewById（R.id.itemLine）;
TextView的TV2 =（TextView中）vi.findViewById（R.id.itemTime）;
HashMap的＆LT;字符串，字符串＆GT;地图;
地图= data.get（位置）;
tv1.setText（map.get（KEY1））;
tv2.setText（map.get（KEY2））;
返回六;
}
}
解决方案
创建一个自定义适配器如下：
公共类ArrayAdapter扩展了BaseAdapter {
私人活动的活动;
私人的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT;数据;
私有静态LayoutInflater吹气= NULL;
私人列表＆LT;字符串＆GT; listString;
公共ArrayAdapter（活动一，ArrayList的＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT; D）{
活性= A;
数据= D;
充气=（LayoutInflater）活动
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
}
//你的getView此方法
}
GetView方法
公开查看getView（INT位置，查看convertView，ViewGroup中父）{
查看VI = convertView;
如果（convertView == NULL）
VI = inflater.inflate（R.layout.custom，NULL）;
TextView的TV1 =（TextView中）vi.findViewById（R.id.tvone）;
TextView的TV2 =（TextView中）vi.findViewById（R.id.tvtwo）;
HashMap的＆LT;字符串，字符串＆GT;图=新的HashMap＆LT;字符串，字符串＆GT;（）;
地图= data.get（位置）;
tv1.setText（map.get（KEY1））;
tv2.setText（map.get（KEY2））;
返回六;
}
请数组列表为：
的ArrayList＆LT; HashMap的＆LT;字符串，字符串＆GT;＆GT; yourList;
和填写 yourList 作为
的HashMap＆LT;字符串，字符串＆GT;图=新的HashMap＆LT;字符串，字符串＆GT;（）;
//添加每个子节点HashMap中的key =＆GT;值
map.put（KEY1，值1）;
map.put（KEY2，值2）;
yourList.add（图）
和同时使定制适配器对象
CustomAdapter适配器=新CustomAdapter（YourActivity.this，yourList）;
list.setAdapter（适配器）;
有关列表你可以做
名单=（ListView控件）getView（）findViewById（android.R.id.list）。
I achieved populate a ListView using StringBuilder from a Internet XML Source.
With this code the listView is populated with only one String but I want populate the listview by elements: getIdLine and getTimeLeft (With CustomAdapter) for customize the layout of the listView items in separated Strings.
How to achieve this?
EDITED CODE
FragmentActivity.class
private ListView listViewEMT;
private ArrayList<HashMap<String, String>> yourList;
... AsyncTask
protected void onPostExecute(String string) {
super.onPostExecute(string);
CustomAdapter adapter = new CustomAdapter(getActivity(), yourList);
listViewEMT.setAdapter(adapter);
this.progressDialog.dismiss();
}
/** RSS HANDLER CLASS */
class RSSHandler extends DefaultHandler {
StringBuffer chars;
private Arrival currentArrival;
RSSHandler() {
this.currentArrival = new Arrival();
this.chars = new StringBuffer();
}
public void characters(char[] arrc, int n, int n2) {
this.chars.append(new String(arrc, n, n2));
}
public void endElement(String string, String string2, String string3) throws SAXException {
super.endElement(string, string2, string3);
if ((string2.equalsIgnoreCase("idStop")) && (this.currentArrival.getIdStop() == null)) {
this.currentArrival.setIdStop(this.chars.toString());
}
if ((string2.equalsIgnoreCase("idLine")) && (this.currentArrival.getIdLinea() == null)) {
this.currentArrival.setIdLinea(this.chars.toString());
}
if ((string2.equalsIgnoreCase("TimeLeftBus")) && (this.currentArrival.getTimeLeft() == 0)) {
int n = Integer.valueOf((String)(this.chars.toString()));
this.currentArrival.setTimeLeft(n);
}
if (!(string2.equalsIgnoreCase("Arrive"))) return;
yourList.add((HashMap<String, String>)(currentArrival.getMap()));
this.currentArrival = new Arrival();
}
public void startElement(String string, String string2, String string3, org.xml.sax.Attributes attributes) throws SAXException {
super.startElement(string, string2, string3, attributes);
this.chars = new StringBuffer();
string2.equalsIgnoreCase("Arrive");
}
}
Arrival.class
...getters and setters
public HashMap<String, String> getMap() {
HashMap<String, String> map;
map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put("KEY1", idLinea);
map.put("KEY2", String.valueOf(timeLeft));
return map;
}
CustomAdapter.class Thanks to Nabin
public class CustomAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater = null;
private List<String> listString;
public CustomAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data = d;
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return 0;
}
@Override
public Object getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.emt_item, null);
TextView tv1 = (TextView) vi.findViewById(R.id.itemLine);
TextView tv2 = (TextView) vi.findViewById(R.id.itemTime);
HashMap<String, String> map;
map = data.get(position);
tv1.setText(map.get("KEY1"));
tv2.setText(map.get("KEY2"));
return vi;
}
}
解决方案
Create a custom adapter as following:
public class ArrayAdapter extends BaseAdapter{
private Activity activity;
private ArrayList<HashMap<String, String>> data;
private static LayoutInflater inflater = null;
private List<String> listString;
public ArrayAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
activity = a;
data = d;
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
//your getView method here
}
GetView Method
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.custom, null);
TextView tv1 = (TextView) vi.findViewById(R.id.tvone);
TextView tv2 = (TextView) vi.findViewById(R.id.tvtwo);
HashMap<String, String> map = new HashMap<String, String>();
map = data.get(position);
tv1.setText(map.get("KEY1"));
tv2.setText(map.get("KEY2"));
return vi;
}
Make array list as:
ArrayList<HashMap<String, String>> yourList;
And fill yourList as
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put("KEY1", value1);
map.put("KEY2", value2);
yourList.add(map);
And while making object of the custom adapter
CustomAdapter adapter = new CustomAdapter(YourActivity.this, yourList);
list.setAdapter(adapter);
For list you can do
list = (ListView) getView().findViewById(android.R.id.list);
这篇关于如何使用CustomAdapter与XML异步任务的ListView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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