जब मैं अपने को फिर से खोल देता हूं ListView, तो मैं अपनी ओर से एक विशिष्ट विधि कहता हूं Adapter।
समस्या :
जब मैं updateReceiptsListअपने से कॉल करता हूं Adapter, तो डेटा रीफ्रेश हो जाता है, लेकिन मेरा ListViewपरिवर्तन नहीं दिखता है।
प्रश्न :
ListViewजब मैं कॉल करता हूं तो मेरा नया डेटा क्यों नहीं दिखाता है notifyDataSetChanged?
एडाप्टर :
public class ReceiptListAdapter extends BaseAdapter {
public List<Receipt> receiptlist;
private Context context;
private LayoutInflater inflater;
private DateHelpers dateH;
public ReceiptListAdapter(Activity activity, Context mcontext, List<Receipt> rl) {
context = mcontext;
receiptlist = rl;
Collections.reverse(receiptlist);
inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
dateH = new DateHelpers();
}
@Override
public int getCount() {
try {
int size = receiptlist.size();
return size;
} catch(NullPointerException ex) {
return 0;
}
}
public void updateReceiptsList(List<Receipt> newlist) {
receiptlist = newlist;
this.notifyDataSetChanged();
}
@Override
public Receipt getItem(int i) {
return receiptlist.get(i);
}
@Override
public long getItemId(int i) {
return receiptlist.get(i).getReceiptId() ;
}
private String getPuntenString(Receipt r) {
if(r.getPoints().equals("1")) {
return "1 punt";
}
return r.getPoints()+" punten";
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
final Receipt receipt = receiptlist.get(position);
ReceiptViewHolder receiptviewholder;
Typeface tf_hn = Typeface.createFromAsset(context.getAssets(), "helveticaneue.ttf");
Typeface tf_hn_bold = Typeface.createFromAsset(context.getAssets(), "helveticaneuebd.ttf");
if (vi == null) { //convertview==null
receiptviewholder = new ReceiptViewHolder();
vi = inflater.inflate(R.layout.view_listitem_receipt, null);
vi.setOnClickListener(null);
vi.setOnLongClickListener(null);
vi.setLongClickable(false);
receiptviewholder.shop = (TextView) vi.findViewById(R.id.tv_listitemreceipt_shop);
receiptviewholder.date = (TextView) vi.findViewById(R.id.tv_listitemreceipt_date);
receiptviewholder.price = (TextView) vi.findViewById(R.id.tv_listitemreceipt_price);
receiptviewholder.points = (TextView) vi.findViewById(R.id.tv_listitemreceipt_points);
receiptviewholder.shop.setTypeface(tf_hn_bold);
receiptviewholder.price.setTypeface(tf_hn_bold);
vi.setTag(receiptviewholder);
}else{//convertview is not null
receiptviewholder = (ReceiptViewHolder)vi.getTag();
}
receiptviewholder.shop.setText(receipt.getShop());
receiptviewholder.date.setText(dateH.timestampToDateString(Long.parseLong(receipt.getPurchaseDate())));
receiptviewholder.price.setText("€ "+receipt.getPrice());
receiptviewholder.points.setText(getPuntenString(receipt));
vi.setClickable(false);
return vi;
}
public static class ReceiptViewHolder {
public TextView shop;
public TextView date;
public TextView price;
public TextView points;
}
public Object getFilter() {
// XXX Auto-generated method stub
return null;
}
}--EDIT:
वर्कअराउंड मिला
बस मेरे पास अभी कुछ कार्यात्मक कोड होने के लिए:
listview.setAdapter( new ReceiptListAdapter(activity,mcontext, -new dataset-);काम करता है, लेकिन यह नहीं है कि यह कैसे काम करना चाहिए।
stackoverflow.com/a/4198569/2382964 , हाय जैस्पर कृपया इस लिंक को देखें ... इससे आपको मदद मिलेगी।
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तुषार पांडे
अन्य तरीकों की कोशिश करें जैसे कि InformItemInserted, InformItemRemoved, आदि ..
—
Reejesh PK