無法處理android post請求到服務器和接收結果回到android

我有關於如何發佈請求和從服務器併發接收響應的研究，我終於得到了一些合理的演練，但它不工作。請提供幫助。無法處理android post請求到服務器和接收結果回到android

 button.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     try{ 
     process(); 
    } catch(Exception ex){ 
Log.e("Url Error Encoding", "Url Error Encoding"); 
     } 
    } 
}); 
    } 

public void process() throws UnsupportedEncodingException{ 

    Prog = spinner1.getSelectedItem().toString(); 
    Dept = spinner2.getSelectedItem().toString(); 
    Session = spinner3.getSelectedItem().toString(); 
    Semester = spinner4.getSelectedItem().toString(); 
    Level = spinner5.getSelectedItem().toString(); 
    Matric = matric.getText().toString(); 

    SharedPreferences sharedPreferences = getSharedPreferences(Config.SHARED_PREF_NAME, Context.MODE_PRIVATE); 
    College = sharedPreferences.getString(Config.COLLEGE_SHARED_PREF,"Not Available"); 

    // Toast.makeText(ProfileActivity.this, Matric + College, Toast.LENGTH_SHORT).show(); 
    // content.setText(Prog); 


    String data = URLEncoder.encode("program", "UTF-8") 
      + "=" + URLEncoder.encode(Prog, "UTF-8"); 

    data += "&" + URLEncoder.encode("dept", "UTF-8") + "=" 
      + URLEncoder.encode(Dept, "UTF-8"); 

    data += "&" + URLEncoder.encode("session", "UTF-8") + "=" 
      + URLEncoder.encode(Session, "UTF-8"); 

    data += "&" + URLEncoder.encode("semester", "UTF-8") + "=" 
      + URLEncoder.encode(Semester, "UTF-8"); 

    data += "&" + URLEncoder.encode("level", "UTF-8") + "=" 
      + URLEncoder.encode(Level, "UTF-8"); 

    data += "&" + URLEncoder.encode("college", "UTF-8") + "=" 
      + URLEncoder.encode(College, "UTF-8"); 

    data += "&" + URLEncoder.encode("matric", "UTF-8") + "=" 
      + URLEncoder.encode(Matric, "UTF-8"); 

    String text = ""; 
    BufferedReader reader=null; 

    try{

//將數據發送

 URL url = new URL("http://www.example.com/locator/checkresult.php"); 

     // Send POST data request 

     URLConnection conn = url.openConnection(); 
     conn.setDoOutput(true); 
     OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream()); 
     wr.write(data); 
     wr.flush(); 

     // Get the server response 

     reader = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
     StringBuilder sb = new StringBuilder(); 
     String line = null; 

     // Read Server Response 
     while((line = reader.readLine()) != null) 
     { 
      // Append server response in string 
      sb.append(line + "\n"); 
     } 

     text = sb.toString(); 



    } catch(Exception ex){ 

     ex.printStackTrace(); 
       } 
finally { 
     try 
     { 
      reader.close(); 
     } 

     catch(Exception ex) { 
      ex.printStackTrace(); 
     } 
    } 

    // Show response on activity 
    content.setText(text); 

}

我的PHP代碼

 <?php 

mysql_connect("localhost", "root", "zzz") or die(mysql_error()); 
mysql_select_db("sis"); 
$conn = mysql_connect("localhost", "root", "zzz"); 

$college = urldecode($_POST['college']); 

$program = urldecode($_POST['program']); 
$level = urldecode($_POST['level']); 
$department = urldecode($_POST['dept']); 
$semester = urldecode($_POST['semester']); 
$session = urldecode($_POST['session']); 
$matric = urldecode($_POST['matric']); 

    print "$program $level $department"; 

?>

//我是profile.xml

<?xml version="1.0" encoding="UTF-8"?> 
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> 
    <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" android:padding="10dp"> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:text="Large Text" android:id="@+id/textView" android:layout_marginBottom="20dp" /> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge" android:id="@+id/textView2" android:layout_marginBottom="20dp" /> 
     <TableLayout android:id="@+id/table" android:layout_width="wrap_content" android:layout_height="25dp" android:focusableInTouchMode="true" android:focusable="true" /> 
     <TextView android:id="@+id/content" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="5dp" /> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Program" android:layout_marginBottom="5dp" /> 
     <Spinner android:id="@+id/programme" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#fff" android:layout_marginBottom="10dp" /> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Level" android:layout_marginBottom="5dp" /> 
     <Spinner android:id="@+id/level" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#fff" android:layout_marginBottom="10dp" /> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Department" android:layout_marginBottom="5dp" /> 
     <Spinner android:id="@+id/dept" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#fff" android:layout_marginBottom="10dp" /> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Semester" android:layout_marginBottom="5dp" /> 
     <Spinner android:id="@+id/semester" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#fff" android:layout_marginBottom="10dp" /> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Session" android:layout_marginBottom="5dp" /> 
     <Spinner android:id="@+id/session" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#fff" android:layout_marginBottom="10dp" /> 
     <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="8dp" android:textStyle="bold" android:text="Enter your matric number" /> 
     <EditText android:id="@+id/rmatric" android:layout_width="match_parent" android:layout_height="50dp" /> 
     <Button android:id="@+id/checkresult" android:layout_width="match_parent" android:layout_height="match_parent" android:text="Check Result" /> 
    </LinearLayout> 
</ScrollView>

敬請幫助。謝謝。

來源

2016-04-25 Webln

這是你的示例代碼

你的PHP文件

<?php 
$val =file_get_contents('php://input'); 
$jsonObj = json_decode($val); 
$jsonObj = (object)$jsonObj; 
$data1 = $jsonObj->yourkey; 
$data2 = $jsonObj->yourkey; 

// your sql execution 

$returnData = array(
    "code" => 500, 
    "msg" => "UserName Already Exist!! Try with diffrent user Name!!", 
    ); 
$a = json_encode($returnData); 
echo $a; 
die(); 

?>

這裏是一些Java代碼 //充滿鍵和值對您的JSON對象

JSONObject object=new JSONObject(); 
try { 
    object.put("key", value); 
    object.put("key", value); 

}catch (JSONException e){} 


// make a request this should run on ui thred 
String urlString = ""; 
RestHelper restHelper = new RestHelper(context); 
RequestFuture requestFuture = RequestFuture.newFuture(); 
response = restHelper.postRequestTest(urlString,object,requestFuture); 
System.out.println("Json Data" + response.toString()); 

//libraries need to compile 
compile 'com.mcxiaoke.volley:library:1.0.19' 
compile 'com.google.code.gson:gson:2.3'

這裏是RestHelper .java

import android.content.Context; 
import android.graphics.Bitmap; 
import android.widget.ImageView; 

import com.android.volley.Request; 
import com.android.volley.RequestQueue; 
import com.android.volley.Response; 
import com.android.volley.RetryPolicy; 
import com.android.volley.VolleyError; 
import com.android.volley.toolbox.ImageRequest; 
import com.android.volley.toolbox.JsonObjectRequest; 
import com.android.volley.toolbox.RequestFuture; 
import com.android.volley.toolbox.StringRequest; 
import com.android.volley.toolbox.Volley; 
import com.naitiks.helpme.Model.HappyMomentsModel; 
import com.naitiks.helpme.R; 

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

import java.util.HashMap; 
import java.util.Map; 
import java.util.concurrent.ExecutionException; 

/** 
* Created by Naitik on 25-04-2016. 
*/ 
public class RestHelper { 

    private RequestQueue queue = null; 
    private Context context = null; 

    public void setQueue(RequestQueue queue) { 
     this.queue = queue; 
    } 

    public RequestQueue getQueue() { 
     return queue; 
    } 

    public RestHelper(Context context){ 
     this.context = context; 
     queue= Volley.newRequestQueue(context); 
    } 
    public JSONObject postRequestTest(String url, final JSONObject userMap,final RequestFuture requestFuture){ 
     JsonObjectRequest postRequest = new JsonObjectRequest(Request.Method.POST, url, userMap,requestFuture,requestFuture); 
     postRequest.setRetryPolicy(new RetryPolicy() { 
      @Override 
      public int getCurrentTimeout() { 
       return 40000; 
      } 

      @Override 
      public int getCurrentRetryCount() { 
       return 5; 
      } 

      @Override 
      public void retry(VolleyError volleyError) throws VolleyError { 
      } 
     }); 
     queue.add(postRequest); 
     try { 
      Object object = requestFuture.get(); 
      System.out.println("*** result" +object.toString()); 
      JSONObject result = (JSONObject)object; 
      return result; 
     } catch (InterruptedException e) { 
      e.printStackTrace(); 
     } catch (ExecutionException e) { 
      e.printStackTrace(); 
     } 
     return null; 
    } 
}

來源

2016-04-25 16:45:40 Naitik

謝謝。你救了我的一天。 – Webln

Myowasure繼續幫助你獲得幫助 – Naitik

爲什麼你不嘗試與排球庫和另一件事，我想建議是使用json，而不是使用url編碼發送數據。

這只是建議。

來源

2016-04-25 16:13:03 Naitik

好的。你可以舉一個如何使用json來歸檔相同的預期結果的例子。感謝您的快速回復。 – Webln

好的，你想用post還是get？ – Naitik

無法處理android post請求到服務器和接收結果回到android

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