Question

我已经看过大多数讨论此问题的问题，但似乎无法找到解决我问题的任何问题。我有一个自定义数组适配器将数据传递到列表，我删除一个项目后我需要刷新列表，我知道notifyDataSetChanged（）应该是我的解决方案，但还没有让它工作对不起我的杂乱代码但我还在学习:) 任何帮助将不胜感激，thanx：）

我的适配器：

public class CustomBasketAdapter extends ArrayAdapter<String> 
{

private String TAG ="Vik";
public String stringEmail= "";
public String stringStore= "";
private String product = "";
private String quantity = "";
private String store = "";

//String[] stringEmail={"stefan.grobler@gmail.com"};

 private final Activity context;
 private final String[] storename;
 private final String[] itemprice;
 private final String[] itemname;
 private final String[] productquantity;
 private final String[] basketlinetotal;



 //public CustomListAdapter(Activity context, String[] itemname,String[]     itemprice, Integer[] imgid) {
 public CustomBasketAdapter(Activity context, String[] storename,String[] itemprice, String[] productquantity, String[] itemname, String[] basketlinetotal ) {
 super(context, R.layout.viewbasket_layout, storename);




 // TODO Auto-generated constructor stub
 this.context=context;
 this.storename=storename;
 this.itemprice=itemprice;
 this.itemname=itemname;
 this.productquantity=productquantity;
 this.basketlinetotal=basketlinetotal;

 Intent intent = ((Activity) context).getIntent();
    if (null != intent)
{
    stringEmail = intent.getStringExtra("EmailAddress");
    stringStore = intent.getStringExtra("StoreDescription");
}

Toast toast = Toast.makeText(getContext(),stringEmail, Toast.LENGTH_LONG);
              toast.setGravity(Gravity.CENTER, 0, 10);
              //toast.show();

 }

 public View getView(int position,View view,ViewGroup parent) {
 LayoutInflater inflater=context.getLayoutInflater();
 View rowView=inflater.inflate(R.layout.viewbasket_layout, null,true);

 final TextView txtstore = (TextView) rowView.findViewById(R.id.txtstorename);
 final TextView txtproduct = (TextView) rowView.findViewById(R.id.txtproduct);
 final TextView txtquantity = (TextView) rowView.findViewById(R.id.txtquantity);
 TextView txtprice = (TextView) rowView.findViewById(R.id.txtprice);
 TextView txttotal = (TextView) rowView.findViewById(R.id.txttotal);
 Button btnclear = (Button) rowView.findViewById(R.id.btnclearitem);

 txtstore.setText(storename[position]);
 txtproduct.setText(itemname[position]);
 txtquantity.setText(productquantity[position]);
 txtprice.setText(itemprice[position]);
 txttotal.setText(basketlinetotal[position]);


 btnclear.setOnClickListener(new OnClickListener(){

    @Override
    public void onClick(View arg0) {

        product = txtproduct.getText().toString();
        quantity = txtquantity.getText().toString();
        store = txtstore.getText().toString();

        DeleteFromBasket();

        Toast toast = Toast.makeText(getContext(),"Item Cleared", Toast.LENGTH_LONG);
          toast.setGravity(Gravity.CENTER, 0, 10);
          toast.show();

          notifyDataSetChanged();



    }
     /*your onclick code*/
 });



 return rowView;




 };



public void ChannelToService()
{

 String SOAP_ACTION = "http://tempuri.org/ITHubServ/DeleteFromBasket";
 String METHOD_NAME = "DeleteFromBasket";
 String NAMESPACE = "http://tempuri.org/";
 String URL = "http://www.buh34nart.co.za/THubServ.svc?wsdl";
 String OrderLine = "";

 try{

     SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME);

    String basketline = stringEmail + "|" + store + "|" + product.replace("|", "") + "|" + quantity;

     //OrderLine = OrderLine.substring(0,OrderLine.length() -1);
     Request.addProperty("Line", basketline);
     //Request.addProperty("UserPassword", txtPass.getText().toString());

     SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
     soapEnvelope.dotNet = true;
     soapEnvelope.setOutputSoapObject(Request);

     HttpTransportSE transport= new HttpTransportSE(URL);

     Object Response = null;

        transport.call(SOAP_ACTION, soapEnvelope);

        Response = soapEnvelope.getResponse();

    //  data = Response.toString().split("[\\x7C]");

      //Log.i(TAG, "Result Order: " + Response);
        //if(Response.toString().equals("1"))
        //{
        //    runOnUiThread(new Runnable() {
        //             public void run() {

              //Toast toast = Toast.makeText(LoginPage.this,"Incorrect Username/Password" +
              //"              Login Failed", Toast.LENGTH_LONG);
              //toast.setGravity(Gravity.CENTER, 0, 10);
              //toast.show();
              //Not Registered or psw wrong or email wrong (forgot password)
         //            }
         //  });
        //}
        //else
        //{
        //  if(Response.toString().equals("9"))
        //  {
        //      startActivity(new Intent("com.ctc.android.widget.TechnicalError"));
        //      // Probleem met system Technical 
        //  }
        //  else
        //  {
                //btnloginclick();
        //  }

    //  }           
 }

 catch(Exception Ex) {}
}



  public void DeleteFromBasket()
 {
   AsyncCallWS task = new AsyncCallWS();
   task.execute();

 }



 private class AsyncCallWS extends AsyncTask<Void, Void, Void>  {


 ProgressDialog progDailog = new ProgressDialog(getContext());

 @Override
 protected Void doInBackground(Void... params) {
     Log.i(TAG, "doInBackground");
     ChannelToService();
     return null;
 }

 @Override
 protected void onPostExecute(Void result) {
     Log.i(TAG, "onPostExecute");
     CustomBasketAdapter.this.clear();
     CustomBasketAdapter.this.addAll();
     CustomBasketAdapter.this.notifyDataSetChanged();

     progDailog.dismiss();





 }


@Override
 protected void onPreExecute() {
     Log.i(TAG, "onPreExecute");
     super.onPreExecute();
     progDailog.setMessage("Loading...");
     progDailog.setIndeterminate(false);
     progDailog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
     progDailog.setCancelable(true);
     progDailog.show();
 }

 @Override
 protected void onProgressUpdate(Void... values) {
     Log.i(TAG, "onProgressUpdate");
     }

}


}

Answer 1

我认为您的问题在于您没有删除字符串数组中的项目。你应该改变

 CustomBasketAdapter.this.clear();
 CustomBasketAdapter.this.addAll();
 CustomBasketAdapter.this.notifyDataSetChanged();

通过

 CustomBasketAdapter.this.remove(item);
 CustomBasketAdapter.this.notifyDataSetChanged();

Answer 2

没关系我找到了解决方案我所做的就是称为构建列表的方法来自自定义适配器

            if(context instanceof ViewBasket){
          ((ViewBasket)context).GetBasketProducts();
        }

因为删除该项目只会更改数据库上的数据，该数据通过了我再次请求信息所需的信息

从Custom Array Adapter中刷新列表

2 个答案: