將數據從android應用程序傳遞到php文件的錯誤

-1

我想使用android應用程序將參數傳遞給php文件。它通過價格，名稱和描述，PHP文件，然後將其插入到SQL Server數據庫：將數據從android應用程序傳遞到php文件的錯誤

這裏是我的代碼：

package com.example.androidhive; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.io.UnsupportedEncodingException; 
import java.util.ArrayList; 
import java.util.List; 

import org.apache.http.NameValuePair; 
import org.apache.http.message.BasicNameValuePair; 
import org.json.JSONException; 
import org.json.JSONObject; 

import android.app.Activity; 
import android.app.ProgressDialog; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 

public class NewProductActivity extends Activity { 

    // Progress Dialog 
    private ProgressDialog pDialog; 

    JSONParser jsonParser = new JSONParser(); 
    EditText inputName; 
    EditText inputPrice; 
    EditText inputDesc; 

    // url to create new product 
    private static String url_create_product = "http://127.0.0.1/android_connect/create_product.php"; 

    // JSON Node names 
    private static final String TAG_SUCCESS = "success"; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.add_product); 

    InputStream is = new InputStream() { 

     @Override 
     public int read() throws IOException { 
      // TODO Auto-generated method stub 
      return 0; 
     } 
    }; 

     try { 
      BufferedReader reader = new BufferedReader(new InputStreamReader(is, "utf-8"), 8); 
     } catch (UnsupportedEncodingException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     // Edit Text 
     inputName = (EditText) findViewById(R.id.inputName); 
     inputPrice = (EditText) findViewById(R.id.inputPrice); 
     inputDesc = (EditText) findViewById(R.id.inputDesc); 

     // Create button 
     Button btnCreateProduct = (Button) findViewById(R.id.btnCreateProduct); 

     // button click event 
     btnCreateProduct.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View view) { 
       // creating new product in background thread 
       new CreateNewProduct().execute(); 
      } 
     }); 
    } 

    /** 
    * Background Async Task to Create new product 
    * */ 
    class CreateNewProduct extends AsyncTask<String, String, String> { 

     /** 
     * Before starting background thread Show Progress Dialog 
     * */ 
     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      pDialog = new ProgressDialog(NewProductActivity.this); 
      pDialog.setMessage("Creating Product.."); 
      pDialog.setIndeterminate(false); 
      pDialog.setCancelable(true); 
      pDialog.show(); 
     } 

     /** 
     * Creating product 
     * */ 
     protected String doInBackground(String... args) { 
      String name = inputName.getText().toString(); 
      String price = inputPrice.getText().toString(); 
      String description = inputDesc.getText().toString(); 

      // Building Parameters 
      List<NameValuePair> params = new ArrayList<NameValuePair>(); 
      params.add(new BasicNameValuePair("name", name)); 
      params.add(new BasicNameValuePair("price", price)); 
      params.add(new BasicNameValuePair("description", description)); 

      // getting JSON Object 
      // Note that create product url accepts POST method 
      JSONObject json = jsonParser.makeHttpRequest(url_create_product, 
        "POST", params); 

      // check log cat fro response 
      Log.d("Create Response", json.toString()); 

      // check for success tag 
      try { 
       int success = json.getInt(TAG_SUCCESS); 

       if (success == 1) { 
        // successfully created product 
        Intent i = new Intent(getApplicationContext(), AllProductsActivity.class); 
        startActivity(i); 

        // closing this screen 
        finish(); 
       } else { 
        // failed to create product 
       } 
      } catch (JSONException e) { 
       e.printStackTrace(); 
      } 

      return null; 
     } 

     /** 
     * After completing background task Dismiss the progress dialog 
     * **/ 
     protected void onPostExecute(String file_url) { 
      // dismiss the dialog once done 
      pDialog.dismiss(); 
     } 

    } 
}

我得到的logcat的文件中的錯誤如下：

E/JSON Parser(371): Error parsing data org.json.JSONException: Value Unknown of type java.lang.String cannot be converted to JSONObject 
E/AndroidRuntime(371): FATAL EXCEPTION: AsyncTask #1 
E/AndroidRuntime(371): java.lang.RuntimeException: An error occured while executing doInBackground() 
E/AndroidRuntime(371): at android.os.AsyncTask$3.done(AsyncTask.java:200) 
E/AndroidRuntime(371): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 
E/AndroidRuntime(371): at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 
E/AndroidRuntime(371): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 
E/AndroidRuntime(371): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 
E/AndroidRuntime(371):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 
E/AndroidRuntime(371): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 
E/AndroidRuntime(371): at java.lang.Thread.run(Thread.java:1019) 
E/AndroidRuntime(371): Caused by: java.lang.NullPointerException 
E/AndroidRuntime(371): at com.example.androidhive.NewProductActivity$CreateNewProduct.doInBackground(NewProductActivity.java:99) 
E/AndroidRuntime(371): at com.example.androidhive.NewProductActivity$CreateNewProduct.doInBackground(NewProductActivity.java:1) 
E/AndroidRuntime(371): at android.os.AsyncTask$2.call(AsyncTask.java:185) 
E/AndroidRuntime(371): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 
E/AndroidRuntime(371): ... 4 more 
E/WindowManager(371): Activity com.example.androidhive.NewProductActivity has leaked window com.and[email protected] that was originally added here 
E/WindowManager(371): android.view.WindowLeaked: Activity com.example.androidhive.NewProductActivity has leaked window [email protected] that was originally added here 
E/WindowManager(371): at android.view.ViewRoot.<init>(ViewRoot.java:258) 
E/WindowManager(371): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 
E/WindowManager(371): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 
E/WindowManager(371): at android.view.Window$LocalWindowManager.addView(Window.java:424) 
E/WindowManager(371): at android.app.Dialog.show(Dialog.java:241) 
E/WindowManager(371): at com.example.androidhive.NewProductActivity$CreateNewProduct.onPreExecute(NewProductActivity.java:76) 
E/WindowManager(371): at android.os.AsyncTask.execute(AsyncTask.java:391) 
E/WindowManager(371): at com.example.androidhive.NewProductActivity$1.onClick(NewProductActivity.java:56) 
E/WindowManager(371): at android.view.View.performClick(View.java:2485) 
E/WindowManager(371): at android.view.View$PerformClick.run(View.java:9080) 
E/WindowManager(371): at android.os.Handler.handleCallback(Handler.java:587) 
E/WindowManager(371): at android.os.Handler.dispatchMessage(Handler.java:92) 
E/WindowManager(371): at android.os.Looper.loop(Looper.java:123) 
E/WindowManager(371): at android.app.ActivityThread.main(ActivityThread.java:3683) 
E/WindowManager(371): at java.lang.reflect.Method.invokeNative(Native Method) 
E/WindowManager(371): at java.lang.reflect.Method.invoke(Method.java:507) 
E/WindowManager(371): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
E/WindowManager(371): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
E/WindowManager(371): at dalvik.system.NativeStart.main(Native Method)

感謝您的幫助提前。

來源

2013-10-17 vjeta

請詳細解釋。 – 2013-10-17 08:36:40

使用上面的代碼，我將3個參數傳遞給名爲，名稱，價格和描述的php文件。 php文件接收這些參數，然後將其插入到數據庫中。但是當我運行這個文件時，它顯示：Application Force Close – vjeta

親愛的朋友的使用這段代碼發送數據到PHP它對我有用我希望也爲你充分使用。

String url = "http://127.0.0.1/android_connect/create_product.php"; 
    URL obj = new URL(url); 
    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection(); 

    //add request header 
    con.setRequestMethod("POST"); 
    con.setRequestProperty("User-Agent", USER_AGENT); 
    con.setRequestProperty("Accept-Language", "en-US,en;q=0.5"); 

    String urlParameters = "name=abc&price=2345&description=description"; 

    // Send post request 
    con.setDoOutput(true); 
    DataOutputStream wr = new DataOutputStream(con.getOutputStream()); 
    wr.writeBytes(urlParameters); 
    wr.flush(); 
    wr.close(); 

    int responseCode = con.getResponseCode(); 


    BufferedReader in = new BufferedReader(
      new InputStreamReader(con.getInputStream())); 
    String inputLine; 
    StringBuffer response = new StringBuffer(); 

    while ((inputLine = in.readLine()) != null) { 
     response.append(inputLine); 
    } 
    in.close(); 

    //print result 
    System.out.println(response.toString());

來源

2013-10-17 08:42:19

我首先需要發送數據到php文件 – vjeta

將所有數據傳遞給「urlParameters」。 – 2013-10-17 08:43:59

這裏的問題是你一個JSONObject分配String。你所要做的就是

錯誤

E/JSON Parser(371): Error parsing data org.json.JSONException: Value Unknown of type java.lang.String cannot be converted to JSONObject

您必須修改這個代碼

 // Note that create product url accepts POST method 
     JSONObject json = jsonParser.makeHttpRequest(url_create_product, 
       "POST", params);

要（假設你收到的答覆從服務器返回爲JSON字符串）

String response = jsonParser.makeHttpRequest(url_create_product, 
       "POST", params); 
    JSONObject json = new JSONObject(response);

希望它有幫助

來源

2013-10-17 08:48:46 GoCrazy

如何將jsonParser對象分配給字符串？ – vjeta

這就是爲什麼我提到假設您的響應爲JSON字符串。你從jsonParser返回的內容。更新代碼。 – GoCrazy

將數據從android應用程序傳遞到php文件的錯誤

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