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我已经设置了一个列表视图我从网上获取一些数据，然后调用我的方法handleData来使用数据并将其放入我的列表视图中，但即使我已经检索到数据并且handleData被称为I getView不被调用。这里是我的代码，我已经把一堆日志语句看到它有多远。ListView GetView不叫
private void handleData(LinkedHashMap<String, List<String>> data) {
Log.i(TAG, "handle data called");
ArrayList<String> myKeys = new ArrayList<>(data.keySet());
String[] desiredOrder = {"Entrée", "Entree"};
int putPosition = 0;
for (String currentString : desiredOrder) {
for (int j = 0; j < myKeys.size(); j++) {
if (myKeys.get(j).equals(currentString)) {
myKeys.remove(j);
myKeys.add(putPosition, currentString);
putPosition++;
}
}
}
LinkedHashMap<String, List<String>> linkedHashMap = new LinkedHashMap<String, List<String>>();
for (int i = 0 ; i < myKeys.size() ; i++) {
linkedHashMap.put(myKeys.get(i), data.get(myKeys.get(i)));
}
mLinkedHashMap = linkedHashMap;
Log.i(TAG, mLinkedHashMap + "");
mHeaderListView = (HeaderListView)findViewById(R.id.HeaderListView_MainActivity);
mHeaderListView.setAdapter(new SectionAdapter() {
@Override
public int numberOfSections() {
return mLinkedHashMap.keySet().toArray().length;
}
@Override
public int numberOfRows(int section) {
if(section >=0){
String sectionKey = (String)mLinkedHashMap.keySet().toArray()[section];
int numOfRows = mLinkedHashMap.get(sectionKey).size();
return numOfRows;
}else{
return 0;
}
}
@Override
public boolean hasSectionHeaderView(int section) {
return true;
}
@Override
public View getRowView(int section, int row, View convertView, ViewGroup parent) {
Log.i(TAG, "GOT HERE");
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
LayoutInflater mLayoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = mLayoutInflater.inflate(R.layout.item_cell_view, parent, false);
holder.textView = (TextView)convertView.findViewById(R.id.text);
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
String sectionKey = (String)mLinkedHashMap.keySet().toArray()[section];
holder.textView.setText(mLinkedHashMap.get(sectionKey).get(row));
return convertView;
}
@Override
public Object getRowItem(int section, int row) {
// return ((String[])mLinkedHashMap.keySet().toArray()[section])[row];
return mLinkedHashMap.keySet().toArray()[section];
}
@Override
public View getSectionHeaderView(int section, View convertView,
ViewGroup parent) {
ViewHolder holder = null;
LayoutInflater mLayoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
holder = new ViewHolder();
convertView = mLayoutInflater.inflate(R.layout.header_cell_view, parent, false);
holder.textView = (TextView)convertView.findViewById(R.id.textSeparator);
convertView.setBackgroundColor((colorBar));
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
holder.textView.setText((String)(mLinkedHashMap.keySet().toArray()[section]));
return convertView;
}
@Override
public void onRowItemClick(AdapterView<?> parent, View view, int section, int row, long id) {
super.onRowItemClick(parent, view, section, row, id);
String sectionName = getRowItem(section, row).toString();
String itemText = mLinkedHashMap.get(sectionName).get(row);
Toast.makeText(DiningItemsActivity.this, "Section " + section + " Row " + row + "Name: " + itemText,
Toast.LENGTH_SHORT).show();
}
});
}
public static class ViewHolder {
public TextView textView;
}
而我没有看到GOT HERE，但我看到我的数据填充数据，处理数据不被调用？
不知道为什么发生这种情况我有这一切在TabHost，如果我把它像这样
myTabHost.setCurrentTab(1);
或本
myTabHost.setCurrentTab(2);
我看到我的数据，但是当它不存在或设置为此
myTabHost.setCurrentTab(0);
我看不到数据我和GOT这里没有叫我很困惑。
下面是部分适配器
public abstract class SectionAdapter extends BaseAdapter implements OnItemClickListener {
private int mCount = -1;
public abstract int numberOfSections();
public abstract int numberOfRows(int section);
public abstract View getRowView(int section, int row, View convertView, ViewGroup parent);
public abstract Object getRowItem(int section, int row);
public boolean hasSectionHeaderView(int section) {
return false;
}
public View getSectionHeaderView(int section, View convertView, ViewGroup parent) {
return null;
}
public Object getSectionHeaderItem(int section) {
return null;
}
public int getRowViewTypeCount() {
return 1;
}
public int getSectionHeaderViewTypeCount() {
return 1;
}
/**
* Must return a value between 0 and getRowViewTypeCount() (excluded)
*/
public int getRowItemViewType(int section, int row) {
return 0;
}
/**
* Must return a value between 0 and getSectionHeaderViewTypeCount() (excluded, if > 0)
*/
public int getSectionHeaderItemViewType(int section) {
return 0;
}
@Override
/**
* Dispatched to call onRowItemClick
*/
public final void onItemClick(AdapterView<?> parent, View view, int position, long id) {
onRowItemClick(parent, view, getSection(position), getRowInSection(position), id);
}
public void onRowItemClick(AdapterView<?> parent, View view, int section, int row, long id) {
}
@Override
/**
* Counts the amount of cells = headers + rows
*/
public final int getCount() {
if (mCount < 0) {
mCount = numberOfCellsBeforeSection(numberOfSections());
}
return mCount;
}
@Override
public boolean isEmpty() {
return getCount() == 0;
}
@Override
/**
* Dispatched to call getRowItem or getSectionHeaderItem
*/
public final Object getItem(int position) {
int section = getSection(position);
if (isSectionHeader(position)) {
if (hasSectionHeaderView(section)) {
return getSectionHeaderItem(section);
}
return null;
}
return getRowItem(section, getRowInSection(position));
}
@Override
public long getItemId(int position) {
return position;
}
@Override
/**
* Dispatched to call getRowView or getSectionHeaderView
*/
public final View getView(int position, View convertView, ViewGroup parent) {
int section = getSection(position);
if (isSectionHeader(position)) {
if (hasSectionHeaderView(section)) {
return getSectionHeaderView(section, convertView, parent);
}
return null;
}
return getRowView(section, getRowInSection(position), convertView, parent);
}
/**
* Returns the section number of the indicated cell
*/
protected int getSection(int position) {
int section = 0;
int cellCounter = 0;
while (cellCounter <= position && section <= numberOfSections()) {
cellCounter += numberOfCellsInSection(section);
section++;
}
return section - 1;
}
/**
* Returns the row index of the indicated cell Should not be call with
* positions directing to section headers
*/
protected int getRowInSection(int position) {
int section = getSection(position);
int row = position - numberOfCellsBeforeSection(section);
if (hasSectionHeaderView(section)) {
return row - 1;
} else {
return row;
}
}
/**
* Returns true if the cell at this index is a section header
*/
protected boolean isSectionHeader(int position) {
int section = getSection(position);
return hasSectionHeaderView(section) && numberOfCellsBeforeSection(section) == position;
}
/**
* Returns the number of cells (= headers + rows) before the indicated
* section
*/
protected int numberOfCellsBeforeSection(int section) {
int count = 0;
for (int i = 0; i < Math.min(numberOfSections(), section); i++) {
count += numberOfCellsInSection(i);
}
return count;
}
private int numberOfCellsInSection(int section) {
return numberOfRows(section) + (hasSectionHeaderView(section) ? 1 : 0);
}
@Override
public void notifyDataSetChanged() {
mCount = numberOfCellsBeforeSection(numberOfSections());
super.notifyDataSetChanged();
}
@Override
public void notifyDataSetInvalidated() {
mCount = numberOfCellsBeforeSection(numberOfSections());
super.notifyDataSetInvalidated();
}
@Override
/**
* Dispatched to call getRowItemViewType or getSectionHeaderItemViewType
*/
public final int getItemViewType(int position) {
int section = getSection(position);
if (isSectionHeader(position)) {
return getRowViewTypeCount() + getSectionHeaderItemViewType(section);
} else {
return getRowItemViewType(section, getRowInSection(position));
}
}
@Override
/**
* Dispatched to call getRowViewTypeCount and getSectionHeaderViewTypeCount
*/
public final int getViewTypeCount() {
return getRowViewTypeCount() + getSectionHeaderViewTypeCount();
}
@Override
/**
* By default, disables section headers
*/
public boolean isEnabled(int position) {
return (disableHeaders() || !isSectionHeader(position)) && isRowEnabled(getSection(position), getRowInSection(position));
}
public boolean disableHeaders() {
return false;
}
public boolean isRowEnabled(int section, int row) {
return true;
}
}
感谢，然后提前帮助。
添加SectionAdapter类的代码。 – 2014-12-19 07:22:46
@PankajKumar请参阅编辑 – iqueqiorio 2014-12-19 07:24:27
将日志添加到'getCount（）'以确保此功能正常工作。如果它返回正确的项目数，则表示意思。我认为它在任何情况下都返回0。 – 2014-12-19 07:32:14