comment appeler notifyDataSetChanged personnalisé ExpandableListView?

je suis en train d'appeler notifyDataSetChanged pour mon custom ExpandableListView. ce qui arrive est de ma liste d'enfants, il affiche les fichiers dans le dossier sélectionné (liste des groupes). lorsque l'enfant est cliqué, il vous demandera si vous voulez supprimer un fichier ou pas. puis, après la suppression, le ExpandableList sera "actualiser". mais de toute façon, je ne pouvais pas appeler la notifyDataSetChanged méthode.

ma coutume adaptateur :

public class customListAdapter extends BaseExpandableListAdapter {
//Sample data set.  children[i] contains the children (String[]) for groups[i].
private File mapFolder = new File (Environment.getExternalStorageDirectory(),"/MLT/A");
private File recordFolder = new File (Environment.getExternalStorageDirectory(),"/MLT/B");
private File scribbleFolder = new File (Environment.getExternalStorageDirectory(),"/MLT/C");
private String[] groups = { "A", "B", "C" };
private String[][] children = { mapFolder.list(), recordFolder.list(), scribbleFolder.list() };
public Object getChild(int groupPosition, int childPosition) {
return children[groupPosition][childPosition];
}
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
public int getChildrenCount(int groupPosition) {
return children[groupPosition].length;
}
public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
View convertView, ViewGroup parent) {
TextView textView = new TextView(MLT_File.this);
textView.setBackgroundColor(Color.BLACK);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
textView.setPadding(100, 5, 0, 5);
textView.setTextColor(Color.WHITE);
textView.setTextSize(23);
textView.setId(1000);
textView.setText(getChild(groupPosition, childPosition).toString());
return textView;
}//getChildView
public Object getGroup(int groupPosition) {
return groups[groupPosition];
}
public int getGroupCount() {
return groups.length;
}
public long getGroupId(int groupPosition) {
return groupPosition;
}
public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
ViewGroup parent) {
TextView textView = new TextView(MLT_File.this);
textView.setBackgroundColor(Color.WHITE);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
textView.setPadding(100, 0, 0, 0);
textView.setTextColor(Color.BLACK);
textView.setTextSize(25);
textView.setText(getGroup(groupPosition).toString());
return textView;
}
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public boolean hasStableIds() {
return true;
}
public void notifyDataSetChanged() {
this.notifyDataSetChanged();
}
}//customListAdapter

mon onCreate :

//Set up our adapter
listAdapter = new customListAdapter();
expLV = (ExpandableListView) findViewById(R.id.mlt_expList);
expLV.setAdapter(listAdapter);
//registerForContextMenu(expLV);
expLV.setOnChildClickListener(new OnChildClickListener()
{
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) 
{
//TODO Auto-generated method stub
String parentName = "";
if (groupPosition == 0)
{
parentName = "A";
}
else if (groupPosition == 1)
{
parentName = "B";
}
else if (groupPosition == 2)
{
parentName = "C";
}
TextView childView = (TextView) v;
String childName = childView.getText().toString();
File file = new File(Environment.getExternalStorageDirectory(),"/Folder/"+childName);
file.delete();
return false;
}
});//OnChildClickListener

la notifyDataSetChanged() dans ma coutume est ce que j'ai essayé de le faire, car j'ai réalisé que je ExpandableList n'en a pas. mais encore, la méthode que j'ai créé n'apparaît pas lorsque j'appuie sur expLV.n ...

OriginalL'auteur Jovi | 2012-01-22