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這是我的代碼庫適配器來設置列表項目。我在notifyDataSetChanged（）中的代碼不起作用。刪除BTN單擊要刪除我如何可以改變工作列表視圖的項目這段代碼，請幫助我不能在BaseAdapter類中使用notifyDataSetChanged（）
public class CustomListviewMyCartitem extends BaseAdapter {
ArrayList<Mycartitem> myList = new ArrayList<Mycartitem>();
LayoutInflater inflater;
Context context;
int loader = R.drawable.loader;
static int minteger = 0;
public String Response_code;
Mycartitem currentListData;
String cid, qcount;
UserSessionManager session;
String rem, b, userid, btntag;
public CustomListviewMyCartitem(Context context, ArrayList<Mycartitem> list) {
this.myList = list;
this.context = context;
inflater = LayoutInflater.from(context);
session = new UserSessionManager(context);
HashMap<String, String> user = session.getUserDetails();
userid = user.get(UserSessionManager.KEY_ID);
Log.e("", "@myList" + myList);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return myList.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return myList.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
/*
* public void updateReceiptsList() { myList.clear(); this.myList = list;
* this.notifyDataSetChanged(); }
*/
public void updateResults(ArrayList<Mycartitem> results) {
this.myList = results;
// Triggers the list update
this.notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
final MyViewHolder mViewHolder;
if (convertView == null) {
convertView = inflater.inflate(R.layout.customcartlist, parent, false);
mViewHolder = new MyViewHolder(convertView);
convertView.setTag(mViewHolder);
} else {
mViewHolder = (MyViewHolder) convertView.getTag();
}
currentListData = myList.get(position);
mViewHolder.txtproductnamecart.setText(currentListData.getCategoryName());
mViewHolder.txtprizecart.setText("$" + currentListData.getCharge());
mViewHolder.txttotalitemcart.setText(currentListData.getQuantity());
mViewHolder.delete.setTag(currentListData.getCartItemId());
mViewHolder.delete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
btntag = mViewHolder.delete.getTag() + "";
new DeleteItem().execute();
}
});
return convertView;
}
private class MyViewHolder {
TextView txtproductnamecart, txtprizecart, txttotalitemcart;
Button delete;
public MyViewHolder(View item) {
txtproductnamecart = (TextView) item.findViewById(R.id.txtproductnamecart);
txtprizecart = (TextView) item.findViewById(R.id.txtprizecart);
txttotalitemcart = (TextView) item.findViewById(R.id.txttotalitemcart);
delete = (Button) item.findViewById(R.id.btndelete);
}
}
private class DeleteItem extends AsyncTask<String, Void, Void> {
protected void onPreExecute() {
// Utils.Pdialog(Cart.this);
}
// Call after onPreExecute method
protected Void doInBackground(String... urls) {
request();
return null;
}
protected void onPostExecute(Void unused) {
Utils.Pdialog_dismiss();
try {
JSONObject jsonObject;
jsonObject = new JSONObject(Response_code);
String msg = jsonObject.getString("status");
if (msg.equals("200")) {
JSONObject jsonArray = jsonObject.getJSONObject("payload");
updateResults(myList);
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
Toast.makeText(context, "No item Found", Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
}
private void request() {
try {
List<NameValuePair> values = new ArrayList<NameValuePair>(2);
values.add(new BasicNameValuePair("userId", userid));
values.add(new BasicNameValuePair("cartItemId", btntag));
values.add(new BasicNameValuePair("action", "singleItem"));
values.add(new BasicNameValuePair("cartId", Utils.CARTID));
Log.e("", "@Parameteruserid" + userid);
Log.e("", "@ParametercartItemId" + currentListData.getCartItemId());
Log.e("", "@Parameteaction" + "singleItem");
Log.e("", "@ParametercartId" + Utils.CARTID);
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 10000);
HttpConnectionParams.setSoTimeout(httpParams, 10000);
HttpClient client = new DefaultHttpClient(httpParams);
String url = Utils.link + "index.php/api/deletecartitem/";
HttpPost httppost = new HttpPost(url);
httppost.setEntity(new UrlEncodedFormEntity(values));
ResponseHandler<String> responseHandler = new BasicResponseHandler();
Response_code = client.execute(httppost, responseHandler);
Log.e("Cart item delete Response :---", "CratItemDelete" + Response_code);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
許多答案張貼:)反正他們中的一個應該正常工作，如果沒有工作:)你可以請確認從服務器異步的任務應答實際上是否刪除了對象：P因爲我在代碼中找不到任何問題：D –