HttpClient無法連接到數據庫

Question

我在連接到我的數據庫時遇到了一些麻煩，我可能需要一些幫助來查看它是錯誤的.java文件還是我的.php文件。結果現在是 「無法連接到數據庫」

PHP文件http://pastebin.com/9fMmzprd

的.java：

package com.example.stolle.httpclient; 
import android.app.Activity; 
import android.os.Bundle; 
import android.os.StrictMode; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.TextView; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.json.JSONArray; 
import org.json.JSONObject; 

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

public class contact extends Activity { 

    TextView resultView; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_contact); 
     StrictMode.enableDefaults(); 
     resultView = (TextView) findViewById(R.id.result); 
     getData(); 
    } 
    public void getData(){ 
     String result =""; 
     InputStream isr = null; 
     try{ 
      HttpClient httpclient = new DefaultHttpClient(); 
      HttpPost httppost = new 
        HttpPost("http://stolle.se.preview.citynetwork.se/kontaktApp/read_allcontacts.php"); 
      HttpResponse response = httpclient.execute(httppost); 
      HttpEntity entity = response.getEntity(); 
      isr = entity.getContent(); 
     } 
     catch (Exception e){ 
      Log.e("log_tag","Error in http connection"+e.toString()); 
      resultView.setText("Couldnt connect to database"); 
     } 


     try{ 
      BufferedReader reader = new BufferedReader(new InputStreamReader(isr,"iso-8859-1"),8); 
      StringBuilder sb = new StringBuilder(); 
      String line = null; 
      while ((line=reader.readLine()) != null) { 
       sb.append(line + "\n"); 
      } 
      isr.close(); 
      result=sb.toString(); 
     } 
     catch(Exception e){ 
      Log.e("log_tag","Error converting result"+e.toString()); 
     } 

     try { 
      String s = ""; 
      JSONArray jArray = new JSONArray(result); 

      for(int i=0; i<jArray.length(); i++){ 
       JSONObject json = jArray.getJSONObject(i); 
       s = s+ 
         "id : "+json.getInt("id")+"\n"+ 
         "name : "+json.getString("name")+"\n"+ 
         "mail : "+json.getString("mail")+"\n"+ 
         "company :"+json.getString("company")+"\n\n"; 
      } 

      resultView.setText(s); 

     } 

     catch (Exception e){ 
//to do handle exception 
      Log.e("Log_tag", "Error Parsing Data" + e.toString()); 
     } 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
// Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_contact, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
// Handle action bar item clicks here. The action bar will 
// automatically handle clicks on the Home/Up button, so long 
// as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

//noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

} 

Answer 1

你的問題不在於PHP。你的PHP文件運行良好。你的錯誤在httppost請求部分。你沒有setEntity這是必需的。詳情請看here。

我可以給一個名稱值對Httppost請求的例子。

ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(); 
nameValuePairs.add(new BasicNameValuePair("test","123")); 
try{ 
     HttpClient httpclient = new DefaultHttpClient(); 
     HttpPost httppost = new HttpPost("URL"); 
     httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); 
     HttpResponse response = httpclient.execute(httppost); 
     HttpEntity entity = response.getEntity(); 
     is = entity.getContent(); 
}