私はアンドロイドの初心者です。
私のカスタム アダプタは、フィルタリング時に例外を引き起こします。
これが私のコードです。プライベート クラス DeptAdapter extends ArrayAdapter implement Filterable {
private ArrayList<Dept> items;
private ArrayList<Dept> mOriginalValues;
public DeptAdapter(Context context, int textViewResourceId, ArrayList<Dept> items) {
super(context, textViewResourceId, items);
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.item_listview_2line, null);
}
Dept d = items.get(position);
if (d != null) {
TextView tt = (TextView) v.findViewById(R.id.toptext);
TextView bt = (TextView) v.findViewById(R.id.bottomtext);
if (tt != null){
tt.setText(d.dept_nm);
}
if(bt != null){
bt.setText(d.dept_cd);
}
}
return v;
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,FilterResults results) {
items = (ArrayList<Dept>) results.values; // has the filtered values
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults(); // Holds the results of a filtering operation in values
ArrayList<Dept> FilteredArrList = new ArrayList<Dept>();
if (mOriginalValues == null) {
mOriginalValues = new ArrayList<Dept>(items); // saves the original data in mOriginalValues
}
if (constraint == null || constraint.length() == 0) {
// set the Original result to return
results.count = mOriginalValues.size();
results.values = mOriginalValues;
} else {
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < mOriginalValues.size(); i++) {
Dept d = mOriginalValues.get(i);
if (d.dept_cd.toLowerCase().startsWith(constraint.toString()) || d.dept_nm.toLowerCase().startsWith(constraint.toString())) {
FilteredArrList.add(d);
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
}
class Dept
{
String dept_cd;
String dept_nm;
public Dept(String dept_cd, String dept_nm)
{
this.dept_cd = dept_cd;
this.dept_nm = dept_nm;
}
public String toString()
{
return this.dept_nm+ "(" + this.dept_cd +")" ;
}
}
誰か助けて.... getView() メソッドが items.size() よりも多く呼び出された理由がわかりません