Question

我有一个ListView，每个ListItem都有一些项目（textViews），其中一个textView有click事件。我已经放入我的自定义adater，而我在其cLick事件上调用asynctask，为此当我点击那个textView时，我想要一个值＆＃34; queID＆＃34;我想要，但目前我得到的是null ..请看我的代码，请帮助我..！＆＃34; qoute＆＃34;是textView.On，我点击了event.how来设置＆＃34; buyer_req_Id＆＃34;并获得标签？我在每个＆＃34; ListItem＆＃34;上成功地获得了标签。点击事件，我想在ListItem的textView.Inside java类中设置相同的标签我只放了适配器，我想要＆＃34; buyer_request_id＆＃34;。的 Adapter.java

package com.epe.yehki.adapter;

import java.util.ArrayList;
import java.util.HashMap;

import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.epe.yehki.ui.BuyingreqActivity;
import com.epe.yehki.ui.BuyingreqActivity.GetQuoteList;
import com.epe.yehki.util.Const;
import com.example.yehki.R;

public class BuyingRequestAdapter extends BaseAdapter {
    public ArrayList<HashMap<String, String>> BuyingRequestArray;
    private Context mContext;

    public BuyingRequestAdapter(Context paramContext, ArrayList<HashMap<String, String>> productList) {
        this.mContext = paramContext;
        this.BuyingRequestArray = productList;

    }

    public int getCount() {
        return this.BuyingRequestArray.size();
    }

    public Object getItem(int paramInt) {
        return BuyingRequestArray.get(paramInt);
    }

    public long getItemId(int paramInt) {
        return paramInt;
    }

    @SuppressWarnings("static-access")
    public View getView(int paramInt, View paramView, ViewGroup paramViewGroup) {
        LayoutInflater localLayoutInflater = (LayoutInflater) this.mContext.getSystemService("layout_inflater");
        Viewholder localViewholder;
        if (paramView == null) {
            paramView = localLayoutInflater.inflate(R.layout.raw_buying_req, paramViewGroup, false);
            localViewholder = new Viewholder();
            localViewholder.sub = ((TextView) paramView.findViewById(R.id.sub));
            localViewholder.expDate = ((TextView) paramView.findViewById(R.id.exp_date));
            localViewholder.quote = ((TextView) paramView.findViewById(R.id.quote));
            localViewholder.status = ((TextView) paramView.findViewById(R.id.status));
            localViewholder.lastUpdate = ((TextView) paramView.findViewById(R.id.last_updated));

            paramView.setTag(localViewholder);

        } else {

            localViewholder = (Viewholder) paramView.getTag();
        }

        System.out.println(":::::::::::::::values:::::::::::::::" + BuyingRequestArray.get(paramInt).get(Const.TAG_PRODUCT_NAME));
        localViewholder.sub.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_PRODUCT_NAME));
        localViewholder.expDate.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_EXPIRY_DATE));
        localViewholder.lastUpdate.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_DATE_MODIFIED));
        localViewholder.quote.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_QUOTE_COUNT));
        localViewholder.quote.setTextColor(Color.parseColor("#0000ff"));
        localViewholder.status.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_BUYING_REQUEST_STATUS));

        localViewholder.quote.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                System.out.println("::::::::::::::::::quote clicked...!!");

                GetQuoteList getQuoteList = ((BuyingreqActivity) mContext).new GetQuoteList();
                getQuoteList.execute();

            }
        });
        return paramView;

    }

    static class Viewholder {
        TextView sub;
        TextView lastUpdate;
        TextView expDate;
        TextView quote;
        TextView status;

    }

}

java class（asynctask）

public class GetQuoteList extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog
            pDialog = new ProgressDialog(BuyingreqActivity.this);
            pDialog.setMessage("Please wait...");
            pDialog.setCancelable(false);
            scr_post.setVisibility(View.GONE);
            scr_view.setVisibility(View.GONE);
            quote_view.setVisibility(View.VISIBLE);
            pDialog.show();

        }

        @Override
        protected Void doInBackground(Void... arg0) {

            // String query = "?customer_id=" +
            // Pref.getValue(BuyingreqActivity.this, Const.PREF_CUSTOMER_ID, "")
            // + "&buyer_request_id=23";
            String query = "?customer_id=" + Pref.getValue(BuyingreqActivity.this, Const.PREF_CUSTOMER_ID, "") + "&buyer_request_id=" + buyer_request_id;
            query = query.replace(" ", "%20");
            viewURL = Const.API_QUOTE_RECIEVED + query;
            BackendAPIService sh = new BackendAPIService();

            System.out.println(":::::::::::::::::::ADDRESS URL:::::::::::::::::" + viewURL);
            // Making a request to url and getting response
            String jsonStr = sh.makeServiceCall(viewURL, BackendAPIService.GET);

            Log.d("Response: ", "> " + jsonStr);
            try {
                if (jsonStr != null) {

                    jsonObj = new JSONObject(jsonStr);

                    if (jsonObj.has(Const.TAG_BUYING_REQUEST)) {
                        System.out.println("::::::::::::::::true::::::::::::::::" + jsonObj.has(Const.TAG_ADDRESS_LIST));
                        requestes = jsonObj.getJSONArray(Const.TAG_BUYING_REQUEST);

                        if (requestes != null && requestes.length() != 0) {
                            // looping through All Contacts

                            System.out.println(":::::::::::FLAG IN SUB:::::::::::" + flag);
                            for (int i = 0; i < requestes.length(); i++) {
                                JSONObject c = requestes.getJSONObject(i);

                                buyerID = c.getString(Const.TAG_BUYING_REQUEST_ID);
                                System.out.println(":::::::::::::::MY buying request:::::::::::::" + buyerID);
                                String product_name = c.getString(Const.TAG_PRODUCT_NAME);
                                String quote_id = c.getString(Const.TAG_QUOTE_ID);
                                String supplier_name = c.getString(Const.TAG_SUPPLIER_NAME);
                                String status = c.getString(Const.TAG_STATUS);

                                HashMap<String, String> quote = new HashMap<String, String>();

                                quote.put(Const.TAG_BUYING_REQUEST_ID, buyerID);
                                quote.put(Const.TAG_PRODUCT_NAME, product_name);
                                quote.put(Const.TAG_QUOTE_ID, quote_id);
                                quote.put(Const.TAG_EXPIRY_DATE, supplier_name);
                                quote.put(Const.TAG_QUOTE_COUNT, status);
                                queList.add(quote);
                                System.out.println(":::::::::::::Buyer request ID:" + buyerID);
                            }
                        }
                    }

                } else {
                    Log.e("ServiceHandler", "Couldn't get any data from the url");
                }

            } catch (JSONException e) {
                e.printStackTrace();
                System.out.println("::::::::::::::::::got an error::::::::::::");
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
            // Dismiss the progress dialog
            if (pDialog.isShowing())
                pDialog.dismiss();
            /**
             * Updating parsed JSON data into ListView
             * 
             * */

            quoteAdapter = new QuoteAdapter(BuyingreqActivity.this, queList);

            quoteList.setAdapter(quoteAdapter);

        }

    }

Answer 1

//试试这种方式，希望这会对你有帮助......

localViewholder.quote.setTag（BuyingRequestArray.get（paramInt）获得（Const.TAG_BUYING_REQUEST_ID））; localViewholder.quote.setOnClickListener（new OnClickListener（）{

   @Override
   public void onClick(View v) {
      System.out.println("::::::::::::::::::quote clicked...!!");
      String buyerId = v.getTag().toString(); // user this buyerId for your requirement 
      System.out.println("Buyer Id Is "+buyerId);
      GetQuoteList getQuoteList = ((BuyingreqActivity) mContext).new GetQuoteList();
      getQuoteList.execute();

   }
});

Answer 2

我通过将asynctask更改为void to string解决了我的问题：的 adapter.java

package com.epe.yehki.adapter; import java.util.ArrayList; import java.util.HashMap; import android.content.Context; import android.graphics.Color; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.TextView; import com.epe.yehki.ui.BuyingreqActivity; import com.epe.yehki.ui.BuyingreqActivity.GetQuoteList; import com.epe.yehki.util.Const; import com.example.yehki.R; public class BuyingRequestAdapter extends BaseAdapter { public ArrayList<HashMap<String, String>> BuyingRequestArray; private Context mContext; public BuyingRequestAdapter(Context paramContext, ArrayList<HashMap<String, String>> reqList) { this.mContext = paramContext; this.BuyingRequestArray = reqList; } public int getCount() { return this.BuyingRequestArray.size(); } public Object getItem(int paramInt) { return BuyingRequestArray.get(paramInt); } public long getItemId(int paramInt) { return paramInt; } @SuppressWarnings("static-access") public View getView(final int paramInt, View paramView, ViewGroup paramViewGroup) { LayoutInflater localLayoutInflater = (LayoutInflater) this.mContext.getSystemService("layout_inflater"); Viewholder localViewholder; if (paramView == null) { paramView = localLayoutInflater.inflate(R.layout.raw_buying_req, paramViewGroup, false); localViewholder = new Viewholder(); localViewholder.sub = ((TextView) paramView.findViewById(R.id.sub)); localViewholder.expDate = ((TextView) paramView.findViewById(R.id.exp_date)); localViewholder.quote = ((TextView) paramView.findViewById(R.id.quote)); localViewholder.status = ((TextView) paramView.findViewById(R.id.status)); localViewholder.lastUpdate = ((TextView) paramView.findViewById(R.id.last_updated)); paramView.setTag(localViewholder); /* localViewholder.quote.setTag(localViewholder); */ } else { localViewholder = (Viewholder) paramView.getTag(); /* localViewholder.quote = ((TextView) paramView.getTag()); */ } final String reqId = BuyingRequestArray.get(paramInt).get(Const.TAG_BUYING_REQUEST_ID); System.out.println("::::::::::::::My reqId:::::::::::" + reqId); localViewholder.sub.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_PRODUCT_NAME)); localViewholder.expDate.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_EXPIRY_DATE)); localViewholder.lastUpdate.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_DATE_MODIFIED)); localViewholder.quote.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_QUOTE_COUNT)); localViewholder.quote.setTextColor(Color.parseColor("#0000ff")); localViewholder.status.setText(BuyingRequestArray.get(paramInt).get(Const.TAG_BUYING_REQUEST_STATUS)); localViewholder.quote.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { System.out.println("::::::::::::::::::quote clicked...!!"); System.out.println("Buyer Id Is " + reqId); GetQuoteList getQuoteList = ((BuyingreqActivity) mContext).new GetQuoteList(); getQuoteList.execute(reqId); } }); return paramView; } static class Viewholder { TextView sub; TextView lastUpdate; TextView expDate; TextView quote; TextView status; } }

单击文本在列表项内查看未获得正确值

2 个答案: