我是Android的新手，也是HeaderListview的新手。我正在使用HeaderListView库。我面临的问题是，当我在运行时动态添加该部分的值时，它会给我以下错误
11-06 15：28：34.674：E / AndroidRuntime（957）：致命异常：主要 11-06 15：28：34.674：E / AndroidRuntime（957）：java.lang.ArithmeticException：除以零 11-06 15：28：34.674：E / AndroidRuntime（957）：at com.applidium.headerlistview.HeaderListView $ HeaderListViewOnScrollListener.updateScrollBar（HeaderListView.java:215） 11-06 15：28：34.674：E / AndroidRuntime（957）：at com.applidium.headerlistview.HeaderListView $ HeaderListViewOnScrollListener.onScroll（HeaderListView.java:115） 11-06 15：28：34.674：E / AndroidRuntime（957）：在android.widget.AbsListView.invokeOnItemScrollListener（AbsListView.java:772） 11-06 15：28：34.674：E / AndroidRuntime（957）：在android.widget.ListView.layoutChildren（ListView.java:1507） 11-06 15：28：34.674：E / AndroidRuntime（957）：在android.widget.AbsListView.onLayout（AbsListView.java:1260） 11-06 15：28：34.674：E / AndroidRuntime（957）：在android.view.View.layout（View.java:7175） 11-06 15：28：34.674：E / AndroidRuntime（957）：在android.widget.RelativeLayout.onLayout（RelativeLayout.java:912） 11-06 15：28：34.674：E / AndroidRuntime（957）：在android.view.View.layout（View.java:7175）
public class DemoJson extends Activity {
ArrayList<DateBean> sortArray = new ArrayList<DateBean>();
String eventName;
JSONArray jsonArray;
JSONObject eventobject;
private Context context;
private ProgressDialog progress;
HeaderListView list;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
list = new HeaderListView(this);
progress =new ProgressDialog(this);
progress.setTitle("Loading data");
progress.setMessage("Please Wait...");
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
context=this;
new FetchData().execute();
progress.show();
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
list.setAdapter( new SectionAdapter() {
@Override
public int numberOfSections() {
// TODO Auto-generated method stub
return sortArray.size();
}
@Override
public int numberOfRows(int section) {
// TODO Auto-generated method stub
return 10;
}
@Override
public View getRowView(int section, int row, View convertView,ViewGroup parent) {
// TODO Auto-generated method stub
if (convertView == null) {
convertView = (TextView) getLayoutInflater().inflate(getResources().getLayout(android.R.layout.simple_list_item_1), null);
}
((TextView) convertView).setText("Section " + section + " Row " + row);
return convertView;
}
@Override
public Object getRowItem(int section, int row) {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean hasSectionHeaderView(int section) {
// TODO Auto-generated method stub
return true;
}
@Override
public int getSectionHeaderViewTypeCount() {
return 2;
}
@Override
public int getSectionHeaderItemViewType(int section) {
return section % 2;
}
@Override
public View getSectionHeaderView(int section, View convertView,ViewGroup parent) {
// TODO Auto-generated method stub
if (convertView == null) {
if (getSectionHeaderItemViewType(section) == 0) {
convertView = (TextView) getLayoutInflater().inflate(getResources().getLayout(android.R.layout.simple_list_item_1), null);
} else {
convertView = getLayoutInflater().inflate(getResources().getLayout(android.R.layout.simple_list_item_2), null);
}
}
if (getSectionHeaderItemViewType(section) == 0) {
((TextView) convertView).setText("Header for section " + section);
} else {
((TextView) convertView.findViewById(android.R.id.text1)).setText("Header for section " + section);
((TextView) convertView.findViewById(android.R.id.text2)).setText("Has a detail text field");
}
switch (section) {
case 0:
convertView.setBackgroundColor(getResources().getColor(R.color.holo_red_light));
break;
case 1:
convertView.setBackgroundColor(getResources().getColor(R.color.holo_orange_light));
break;
case 2:
convertView.setBackgroundColor(getResources().getColor(R.color.holo_green_light));
break;
case 3:
convertView.setBackgroundColor(getResources().getColor(R.color.holo_blue_light));
break;
case 4:
convertView.setBackgroundColor(getResources().getColor(R.color.holo_red_light));
}
return convertView;
}
@Override
public void onRowItemClick(AdapterView<?> parent, View view, int section, int row, long id) {
super.onRowItemClick(parent, view, section, row, id);
Toast.makeText(DemoJson.this, "Section " + section + " Row " + row + " ID " + id, Toast.LENGTH_SHORT).show();
}
});
setContentView(list);
}
class FetchData extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Void doInBackground(Void... params) {
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl("http:// Url Value");
try {
eventobject = json.getJSONObject("events");
Iterator<Object> keys = eventobject.keys();
while (keys.hasNext()) {
String datestring = String.valueOf(keys.next());
// by below logic you skip missed date.
if (datestring.trim().length() > 0) {
SimpleDateFormat formatter = new SimpleDateFormat(
"yyyy-MM-dd");
Date date = formatter.parse(datestring);
DateBean dateBean = new DateBean(date);
sortArray.add(dateBean);
} else {
}
}
System.out.println("size:" + sortArray.size());
System.out.println("==========sorting array======");
Collections.sort(sortArray, new CompareDate());
// reverse order
// Collections.reverse(sortArray);
for (DateBean d : sortArray) {
final String dateKey = new SimpleDateFormat("yyyy-MM-dd")
.format(d.getDate());
System.out.println("here date key:"+dateKey);
JSONArray jsonArray = eventobject.getJSONArray(dateKey);
System.out.println("DateKey--" + jsonArray);
eventName = new String();
for(int i=0 ; i<jsonArray.length() ; i++){
JSONObject i_lo= jsonArray.getJSONObject(i);
eventName = i_lo.getString("name");
System.out.println("name is :" + eventName);
}
}
这里我的sortArray是具有我想要的部分值的arrarylist。
另外我需要在setContentview（）中设置一个布局，因为我在listview旁边的布局中还有其他元素。
提前谢谢
答案 0 :(得分：0)
在设置适配器
之前，可以将标题添加到列表视图中