java - 如何通过动态使用android中的方法建立一个字符串url？

Question

我做了一个 Activity 。因为我必须为 api 使用一个异步任务。所以在那个异步任务中，我的 url 将根据一些数字动态生成。我试过如下，但这不是正确的方法。谁能告诉我如何制作这个网址？

我的示例网址是: http://yehki.epagestore.in/app_api/order.php?customer_id=41&address_id=31&products[0][productName]=rt&products[0][product_id]=41&products[0][quantity]=2&products[0][unit]=1&products[0][unitPrice]=400&products[1][productName]=rt&products[1][product_id]=40&products[1][quantity]=2&products[1][unit]=1&products[1][unitPrice]=400

我的尝试是:

 package com.epe.yehki.ui;

import java.lang.reflect.Array;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.R.string;
import android.app.Activity;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Paint.Join;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RelativeLayout;
import android.widget.SimpleAdapter;
import android.widget.TextView;

import com.epe.yehki.adapter.CartAdapter;
import com.epe.yehki.backend.BackendAPIService;
import com.epe.yehki.util.Const;
import com.epe.yehki.util.Pref;
import com.epe.yehki.util.Utils;
import com.example.yehki.R;

public class CartPlaceOrderActivity extends Activity {
    private ProgressDialog pDialog;

    Button confirm, shipping;
    RelativeLayout rl_adress;
    TextView product_name;
    String proName;
    TextView tv_adress;
    TextView tv_select_adres;
    EditText qty;
    String order_id;
    EditText price;
    TextView tv_subtotal;
    JSONArray carts = null;
    ListView cart_list;
    String myUrl;
    private CartAdapter cartContent;
    JSONObject jsonObj;
    ArrayList<HashMap<String, String>> cartList;
    HashMap<String, String> cartProduct;

    TextView tv_total;
    ArrayAdapter<String> adapter;
    String method;
    ImageView back;
    RadioGroup rd;
    String add_id;
    RadioButton yes, no;
    Double min_qty, min_agree_prc, max_agree_prc, min_agree_qty, max_agree_qty, max_price, min_price;
    String placeOrderurl, pro_desc;
    String unit_id;
    String min_qty_unit_name;
    String subtotal, total;
    ArrayList<HashMap<String, String>> productList;
    Intent i;
    String unit;
    String pro_id;
    JSONArray jArryCompleteOrder = null;
    JSONArray jArryPayeeKey = null;
    JSONArray jArryProductId = null;
    JSONArray jArryOrderProId = null;
    ArrayList<String> completeOrderArray = null;
    ArrayList<String> payeeKeyArray = null;
    ArrayList<String> productIdArray = null;
    ArrayList<String> orderProductIdArray = null;
    String shipCity, shipCountry, shipoAddress, shipTime;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_cart_place_order);

        // FINDINLG IDS...!!
        qty = (EditText) findViewById(R.id.et_qty);
        price = (EditText) findViewById(R.id.et_price);
        rl_adress = (RelativeLayout) findViewById(R.id.btn_adress);
        product_name = (TextView) findViewById(R.id.tv_product_name);
        tv_adress = (TextView) findViewById(R.id.tv_adress);
        tv_select_adres = (TextView) findViewById(R.id.tv_select_adress);
        tv_total = (TextView) findViewById(R.id.tv_total);
        tv_subtotal = (TextView) findViewById(R.id.tv_subtotal);
        back = (ImageView) findViewById(R.id.iv_back);
        confirm = (Button) findViewById(R.id.btn_confirm);

        yes = (RadioButton) findViewById(R.id.yes);
        no = (RadioButton) findViewById(R.id.no);
        productList = new ArrayList<HashMap<String, String>>();
        cart_list = (ListView) findViewById(R.id.cart_list);
        cartList = new ArrayList<HashMap<String, String>>();
        completeOrderArray = new ArrayList<String>();
        productIdArray = new ArrayList<String>();
        orderProductIdArray = new ArrayList<String>();
        payeeKeyArray = new ArrayList<String>();
        new GetCartList().execute();

        // SELECT ADDRESS CLICK EVENT..!
        rl_adress.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {

                i = new Intent(CartPlaceOrderActivity.this, AddressListActivity.class);
                startActivityForResult(i, 1);
            }
        });

        back.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                finish();
            }
        });
        confirm.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                if (!tv_adress.getText().toString().equals("") && tv_adress.getText().toString() != null) {

                    new GetPlaceOrder().execute();
                    System.out.println("::::::::::::PLACE ORDER API CALLED::::::::::");

                }

                else {
                    Utils.showCustomeAlertValidation(CartPlaceOrderActivity.this, "Please select adress", "Yehki", "Ok");
                }
            }

        });

    }

    // GETTING ADDRESS VALUES FROM ADDESSlIST ACTIVITY...
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent i) {

        if (resultCode == 2 && requestCode == 1) {
            add_id = i.getStringExtra(Const.TAG_ADDRESS_SHIPPING_ID);
            Pref.setValue(CartPlaceOrderActivity.this, Const.PREF_ADRESS_ID, add_id);
            i.getStringExtra(Const.TAG_ADDRESS_BUYER);
            Pref.setValue(CartPlaceOrderActivity.this, Const.PREF_ADDRESS_BUYER, i.getStringExtra(Const.TAG_ADDRESS_BUYER));
            shipCity = i.getStringExtra(Const.TAG_ADDRESS_CITY);
            shipoAddress = i.getStringExtra(Const.TAG_ADDRESS_STATE);
            shipCountry = i.getStringExtra(Const.TAG_ADRESS_COUNTRY);
            shipTime = i.getStringExtra(Const.TAG_SHIP_TIME);
            i.getStringExtra(Const.TAG_ADDRESS_TELEPHONE);
            i.getStringExtra(Const.TAG_ADDRESS_FAX);

            try {
                if (!i.getStringExtra(Const.TAG_ADDRESS_BUYER).equals("") && i.getStringExtra(Const.TAG_ADDRESS_BUYER) != null) {
                    tv_adress.setVisibility(View.VISIBLE);
                    tv_adress.setText(i.getStringExtra(Const.TAG_ADDRESS_BUYER) + "\n" + i.getStringExtra(Const.TAG_ADDRESS_CITY) + "\n" + i.getStringExtra(Const.TAG_ADDRESS_STATE) + "\n"
                            + i.getStringExtra(Const.TAG_ADRESS_COUNTRY) + "\n" + i.getStringExtra(Const.TAG_ADDRESS_TELEPHONE) + "\n" + i.getStringExtra(Const.TAG_ADDRESS_FAX) + "");
                    tv_select_adres.setVisibility(View.GONE);
                    System.out.println(":::::::::::::::::::VALUES::::::::::::::::::" + i.getStringExtra(Const.TAG_ADDRESS_BUYER));
                } else {
                    tv_adress.setVisibility(View.GONE);
                    tv_select_adres.setVisibility(View.VISIBLE);

                }
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }

    }

    // GETTING ORDER ID AND PALCE ORDER CONFIRAMATION CALL.....FOR WEBvIEW OR
    // WHAT...........!!!
    private class GetPlaceOrder extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog

            pDialog = new ProgressDialog(CartPlaceOrderActivity.this);
            pDialog.setCancelable(false);
            pDialog.show();
            System.out.println("==========inside preexecute===================");

            /*
             * FUNCTION FOR MAKING REQUEST URL...!!!
             */

        }

        void prepareURL() {
            Uri.Builder builder = new Uri.Builder();
            builder.scheme("http").authority("yehki.epagestore.in").appendPath("app_api").appendPath("order.php")
                    .appendQueryParameter("customer_id", Pref.getValue(CartPlaceOrderActivity.this, Const.PREF_CUSTOMER_ID, "")).appendQueryParameter("address_id", add_id);

            for (int i = 0; i < carts.length(); i++) {
                builder.appendQueryParameter("products[" + i + "][productName]", cartProduct.get(Const.TAG_PRODUCT_NAME));
                builder.appendQueryParameter("products[" + i + "][productId]", cartList.get(i).get(Const.TAG_PRODUCT_ID));

                // and so on...
            }

            String myUrl = builder.build().toString();
            System.out.println("::::::::::::::::URL PRODUCT NAMER::::::::::::::" + myUrl);
        }

        void makeURL() {
            StringBuilder sb = new StringBuilder();
            String query = "http://yehki.epagestore.in/app_api/order.php?customer_id=" + Pref.getValue(CartPlaceOrderActivity.this, Const.PREF_CUSTOMER_ID, "") + "&address_id=" + add_id;
            sb.append(query);

            for (int i = 0; i < carts.length(); i++) {
                sb.append(("&products[" + i + "][productName]=" + cartList.get(i).get((Const.TAG_PRODUCT_NAME))));
                sb.append(("&products[" + i + "][product_id]=" + cartList.get(i).get((Const.TAG_PRODUCT_ID))));
                sb.append(("&products[" + i + "][quantity]=" + cartList.get(i).get((Const.TAG_QUANTITY))));

                sb.append(("&products[" + i + "][unit]=" + cartList.get(i).get((Const.TAG_UNIT))));
                sb.append(("&products[" + i + "][unitPrice]=" + cartList.get(i).get((Const.TAG_RETAIL_PRICE))));
            }

            myUrl = sb.toString();
            myUrl = Uri.encode(myUrl);
            System.out.println("::::::::::::::::URL PRODUCT NAMER::::::::::::::" + myUrl);

        }

        @Override
        protected Void doInBackground(Void... arg0) {
            // Creating service handler class instance
            BackendAPIService sh = new BackendAPIService();

            makeURL();

            System.out.println("::::::::::::::::My place order url:::::::::::" + myUrl);

            // Making a request to url and getting response
            String jsonStr = sh.makeServiceCall(myUrl, BackendAPIService.POST);

            Log.d("Response: ", "> " + jsonStr);
            System.out.println("=============MY RESPONSE FOR PLACEORDER>>==========" + jsonStr);

            if (jsonStr != null) {
                try {

                    JSONObject jsonObj = new JSONObject(jsonStr);

                    order_id = jsonObj.getString(Const.TAG_ORDER_ID);
                    Pref.setValue(CartPlaceOrderActivity.this, Const.PREF_ORDER_ID, order_id);
                    System.out.println("::::::::::::::::::MY order ID::::::::::::::::;++++++++++++++>>>>>>>>>>> " + order_id);

                    // FOR ORDER COMPLETION TIME....!!!
                    if (jsonObj.has(Const.TAG_COMPLETE_ORDER_TIME)) {
                        jArryCompleteOrder = jsonObj.getJSONArray(Const.TAG_COMPLETE_ORDER_TIME);
                        if (jArryCompleteOrder != null && jArryCompleteOrder.length() != 0) {
                            for (int i = 0; i < jArryCompleteOrder.length(); i++) {
                                jArryCompleteOrder.getString(i);
                                System.out.println("::::::::::::::COMPLETETION ORDER TI,E INSIDE JSON>>>>>>>>>" + jArryCompleteOrder.getString(i));

                                completeOrderArray.add(jArryCompleteOrder.getString(i));
                            }
                        }
                    }

                    // FOR PAYEE KEY...!!!
                    if (jsonObj.has(Const.TAG_PAYEE_KEY)) {
                        jArryPayeeKey = jsonObj.getJSONArray(Const.TAG_PAYEE_KEY);
                        if (jArryPayeeKey != null && jArryPayeeKey.length() != 0) {
                            for (int i = 0; i < jArryPayeeKey.length(); i++) {
                                jArryPayeeKey.getString(i);
                                System.out.println("::::::::::::::PAYEE KEY INSIDE JSON>>>>>>>>>" + jArryPayeeKey.getString(i));

                                payeeKeyArray.add(jArryPayeeKey.getString(i));
                            }
                        }
                    }

                    // FOR PRODUCT IDS......!!!
                    if (jsonObj.has(Const.TAG_PRODUCT_ID)) {
                        jArryProductId = jsonObj.getJSONArray(Const.TAG_PRODUCT_ID);
                        if (jArryProductId != null && jArryProductId.length() != 0) {
                            for (int i = 0; i < jArryProductId.length(); i++) {
                                String pro_id = jArryProductId.getString(i);
                                System.out.println("::::::::::::::PRTODUCT ID INSIDE JSON>>>>>>>>>" + jArryProductId.getString(i));

                                productIdArray.add(jArryProductId.getString(i));
                                System.out.println(":::::MY length::::::" + productIdArray.size());
                            }
                        }

                        // FOR ORDER PRODUCT IDS......!!!
                        if (jsonObj.has(Const.TAG_ORDER_PRODUCT_ID)) {
                            jArryOrderProId = jsonObj.getJSONArray(Const.TAG_ORDER_PRODUCT_ID);
                            if (jArryOrderProId != null && jArryOrderProId.length() != 0) {
                                for (int i = 0; i < jArryOrderProId.length(); i++) {
                                    jArryOrderProId.getString(i);
                                    System.out.println("::::::::::::::ORDER PRODUCT KEY INSIDE JSON>>>>>>>>>" + jArryOrderProId.getString(i));

                                    orderProductIdArray.add(jArryCompleteOrder.getString(i));
                                    System.out.println(":::::MY length::::::" + orderProductIdArray.size());
                                }
                            }
                        }
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } else {
                Log.e("ServiceHandler", "Couldn't get any data from the url");

            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);

            // Dismiss the progress dialog
            if (pDialog.isShowing())
                pDialog.dismiss();
            // String webView = "";

            i = new Intent(CartPlaceOrderActivity.this, PaymentOptionActivity.class);
            i.putExtra(Const.TAG_ORDER_ID, order_id);
            startActivity(i);
            finish();

        }
    }

    // GET CART lIST PRODUCT PLACE ORDER.........!!!
    private class GetCartList extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog
            pDialog = new ProgressDialog(CartPlaceOrderActivity.this);
            pDialog.setMessage("Please wait...");
            pDialog.setCancelable(false);
            pDialog.show();

        }

        @Override
        protected Void doInBackground(Void... arg0) {
            // Creating service handler class instance
            String cartUrl = Const.API_CART_LIST + "?customer_id=" + Pref.getValue(CartPlaceOrderActivity.this, Const.PREF_CUSTOMER_ID, "");
            BackendAPIService sh = new BackendAPIService();
            // Making a request to url and getting response
            String jsonStr = sh.makeServiceCall(cartUrl, BackendAPIService.GET);

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

                    jsonObj = new JSONObject(jsonStr);
                    total = jsonObj.getString(Const.TAG_TOTAL);

                    // Getting JSON Array node
                    if (jsonObj.has(Const.TAG_PRO_LIST)) {

                        carts = jsonObj.getJSONArray(Const.TAG_PRO_LIST);
                        if (carts != null && carts.length() != 0) {
                            // looping through All Contacts

                            for (int i = 0; i < carts.length(); i++) {
                                JSONObject c = carts.getJSONObject(i);

                                String proId = c.getString(Const.TAG_PRODUCT_ID);
                                String proName = c.getString(Const.TAG_PRODUCT_NAME);
                                String wPrice = c.getString(Const.TAG_WHOLESALE_PRICE);
                                String rPrice = c.getString(Const.TAG_RETAIL_PRICE);
                                String qty = c.getString(Const.TAG_QUANTITY);
                                String subTotal = c.getString(Const.TAG_SUBTOTAL);
                                String unit_id = c.getString("unit_id");

                                String proimg = Const.API_HOST + "/" + c.getString(Const.TAG_PRODUCT_IMG);
                                cartProduct = new HashMap<String, String>();

                                cartProduct.put(Const.TAG_PRODUCT_ID, proId);
                                cartProduct.put(Const.TAG_PRODUCT_NAME, proName);
                                cartProduct.put(Const.TAG_PRODUCT_IMG, proimg);
                                cartProduct.put(Const.TAG_WHOLESALE_PRICE, wPrice);
                                cartProduct.put(Const.TAG_RETAIL_PRICE, rPrice);
                                cartProduct.put(Const.TAG_QUANTITY, qty);
                                cartProduct.put(Const.TAG_SUBTOTAL, subTotal);
                                cartProduct.put(Const.TAG_TOTAL, total);
                                cartProduct.put(Const.TAG_UNIT, unit_id);
                                cartList.add(cartProduct);

                            }
                        }
                    }

                } 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();

            cartContent = new CartAdapter(CartPlaceOrderActivity.this, cartList);
            cart_list.setAdapter(cartContent);
            tv_total.setText("Total:" + total);

        }

    }

}

Answer 1

确保您是否使用像在循环之前初始化它那样的构建器帮助程序类。

也就是说，UriBuilder是您问题的完美解决方案，它是用于构建或操作 url 的辅助类。

下面是一个例子:

Uri.Builder builder = new Uri.Builder();
builder.scheme("http")
    .authority("yehki.epagestore.in")
    .appendPath("app_api")
    .appendPath("order.php")
    .appendQueryParameter("customer_id", customer_id)
    .appendQueryParameter("address_id", address_id);

for (int i = 0; i < carts.length(); i++) {
   builder.appendQueryParameter("products["+i+"][productName]", cartList.get(i).get((Const.TAG_PRODUCT_NAME)));
   builder.appendQueryParameter("products["+i+"][productId]", cartList.get(i).get((Const.TAG_PRODUCT_ID)));
   builder.appendQueryParameter("products["+i+"][quantity]", cartList.get(i).get((Const.TAG_QUANTITY)));
   builder.appendQueryParameter("products["+i+"][unit]", cartList.get(i).get((Const.TAG_UNIT)));
   builder.appendQueryParameter("products["+i+"][unitPrice]", cartList.get(i).get((Const.TAG_RETAIL_PRICE)));

}

String myUrl = builder.build().toString();