如何使用黑莓模拟器从本地服务器获取数据

Question

我想使用黑莓模拟器从服务器本地主机获取数据。我的服务器将数据提供给JSON文件。如何在Blackberry模拟器中显示数据以及如何将JSON解析为字符串。 我希望有人帮助我。

这是我的服务器源代码。

<?php 
    require('db.php'); 
    $query="select*from penarikan"; 
    $hasil=mysql_query($query); 
    if(mysql_num_rows($hasil)>0) 
    { 
     while($data=mysql_fetch_array($hasil)) 
     { 
      $x[]=$data; 
     } 

    } 
    echo(json_encode($x)); 
?> 

，这是黑莓

package com.irwan.bb.pa; 

import java.io.InputStream; 
import java.io.InputStreamReader; 

import javax.microedition.io.Connector; 
import javax.microedition.io.HttpConnection; 

import org.json.me.JSONObject; 

import net.rim.device.api.ui.component.LabelField; 
import net.rim.device.api.ui.container.MainScreen; 

public class ScreenViewPenarikan extends MainScreen { 
    HttpConnection httpconnection; 
    InputStream inputStream; 


    public ScreenViewPenarikan() { 
     super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR); 
     runJson(); 
    } 

    public void runJson() 
    { 
     try { 

      String url="http://127.0.0.1:80/proyek_akhir/view_penarikan.php;deviceside=true"; 
      System.out.println(url); 

      //connect to server 
      httpconnection=(HttpConnection)Connector.open(url); 
      inputStream=httpconnection.openDataInputStream(); 

      if(httpconnection.getResponseCode()==HttpConnection.HTTP_OK) 
      { 
       //add(new LabelField("Ada konesksi")); 
       InputStreamReader reader= new InputStreamReader(inputStream,"UTF-8"); 
       int readCharacter; 
       StringBuffer responseBuffer = new StringBuffer(); 
       while ((readCharacter = reader.read()) != -1) { 
        responseBuffer.append((char) readCharacter); 
        httpconnection.close(); 
        inputStream.close(); 
        reader.close(); 
        String responseMessage = new String(responseBuffer); 
        JSONObject object = new JSONObject(responseMessage); 
        add(new LabelField(object)); 


       } 
      } 
      else{ 
       //add(new LabelField("Koneksi tidak ada")); 
      } 

     } catch (Exception e) { 
      // TODO: handle exception 
     } 
    } 

} 

Answer 1

我的源代码试试这个 -

[ 
    { 
     "0": "1", 
     "1": "2", 
     "2": "2013-06-30", 
     "3": "30110089", 
     "id_penarikan": "1", 
     "jlh_nominal": "2", 
     "tanggal‌": "2013-06-30", 
     "no_rekening": "30110089" 
    } 
] 

和

while ((readCharacter = reader.read()) != -1) { 
    responseBuffer.append((char) readCharacter); 
    } 

    String val=""; 
    String responseMessage = new String(responseBuffer); 
    JSONArray j=new JSONArray(responseMessage); 
    JSONObject j0=j.getJSONObject(0); 
    val=j0.getString("id_penarikan"); 
    add(new LabelField(val));