嗨，我对这个 android 很陌生..实际上我正在尝试在屏幕上显示 1 个标题和描述。我已经使用 Galleryview 完成了。我不知道这是否是正确的方法。
我的实际想法是..在galleryview中，如果我滑动屏幕下一个（标题和描述应该出现）但我不能这样做..所以我试图保留下一个和上一个选项来执行此操作..但这也是我不能做..我知道我做错了。请给我一些好办法。
我的活动代码：
public class NewsDescription extends Activity
{
// private String url = "http://m.indiatoday.in/xml/stories/"+(String)context.getInstance().getAppVariable("storyurl");
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.newsdesgallery);
Gallery gl=(Gallery)findViewById(R.id.GalleryNewsDesc);
NewsDescriptionAdapter adapter =new NewsDescriptionAdapter(this);
gl.setAdapter(adapter);
}
}
我的适配器类：
public class NewsDescriptionAdapter extends BaseAdapter
{
private static Context contxt;
String[] body= {};//new String[30];
String[] heading= {};//new String[30];
NewsDescriptionAdapter(Context conxt)
{
// System.out.println("inside cons");
this.contxt=conxt;
getelement();
}
public void getelement()
{
// System.out.println("Inside getElement");
String[] url=context.getInstance().getselectedUrl();
// System.out.println("After url");
// System.out.println("count="+(String)context.getInstance().getAppVariable("count"));
int count = Integer.parseInt((String)context.getInstance().getAppVariable("count"));
// System.out.println("count="+count);
// System.out.println("after count="+url[count]);
String URL = "http://xxxx.in/xml/stories/"+url[count];
// System.out.println("url="+URL);
TaplistingParser parser = new TaplistingParser();
// try {
// url=URLEncoder.encode(url, "UTF-8");
// } catch (UnsupportedEncodingException e1) {
// // TODO Auto-generated catch block
// e1.printStackTrace();
// }
URL=URL.replace(" ","");
// System.out.println("url="+url);
String xml= parser.getXmlFromUrl(URL);
Document doc=parser.getDomElement(xml);
NodeList n1 = doc.getElementsByTagName("item");
body = new String[n1.getLength()];
heading = new String[n1.getLength()];
for( int i = 0 ; i < n1.getLength(); i++ )
{
// HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) n1.item(i);
body[i]=parser.getValue(e, "body");
heading[i]=parser.getValue(e, "headline");
// map.put("Body", parser.getValue(e,"body"));
// menuItems.add(map);
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return body.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return body[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
// TODO Auto-generated method stub
// System.out.println("body="+body[position]);
if (convertView == null)
{
//this should only ever run if you do not get a view back
LayoutInflater inflater = (LayoutInflater) contxt
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.newsdescriptionrow, null);
}
TextView next =(TextView)convertView.findViewById(R.id.nextnews);
// final Gallery gal=(Gallery)convertView.findViewById(R.id.GalleryNewsDesc);
next.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
System.out.println("Inside next");
int count = Integer.parseInt((String)context.getInstance().getAppVariable("count"));
count++;
context.getInstance().setAppVariable("count", Integer.toString(count));
}
});
TextView textViewhead = (TextView) convertView
.findViewById(R.id.name_DescHeading);
textViewhead.setText(heading[position]);
TextView textView = (TextView) convertView
.findViewById(R.id.name_Desclabel);
textView.setText(body[position]);
return convertView;
}
}