title: AsyncTask #3 error parsing JSON object. String cannot be converted to JSONObject
body: <p>Can someone please tell me what my error is? I downloaded this code from AndroidHive.info. I keeping getting a "Error parsing data error. Also can someone show me how to find out what line the error is on?</p>
  
  <pre><code>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://xxx.xxx.xxx.xxx/include/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);
  
          // 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() {
  
              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&lt;String, String, String&gt; {
  
          /**
           * 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&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;();
              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();
          }
  
      }
  }
  </code></pre>
  
  <p><strong>here is my logcat</strong></p>
  
  <pre><code>01-26 18:14:35.366: D/dalvikvm(12395): GC_CONCURRENT freed 72K, 52% free 2619K/5379K, external 1529K/2026K, paused 8ms+2ms
  01-26 18:14:36.296: E/JSON Parser(12395): Error parsing data org.json.JSONException: Value Unknown of type java.lang.String cannot be converted to JSONObject
  01-26 18:14:36.296: W/dalvikvm(12395): threadid=9: thread exiting with uncaught exception (group=0x2aac8560)
  01-26 18:14:36.306: E/AndroidRuntime(12395): FATAL EXCEPTION: AsyncTask #1
  01-26 18:14:36.306: E/AndroidRuntime(12395): java.lang.RuntimeException: An error occured while executing doInBackground()
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at android.os.AsyncTask$3.done(AsyncTask.java:200)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.lang.Thread.run(Thread.java:1019)
  01-26 18:14:36.306: E/AndroidRuntime(12395): Caused by: java.lang.NullPointerException
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at com.example.androidhive.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:129)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at com.example.androidhive.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:1)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at android.os.AsyncTask$2.call(AsyncTask.java:185)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
  01-26 18:14:36.306: E/AndroidRuntime(12395):    ... 4 more
  01-26 18:14:36.566: E/WindowManager(12395): Activity com.example.androidhive.AllProductsActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@2afca938 that was originally added here
  01-26 18:14:36.566: E/WindowManager(12395): android.view.WindowLeaked: Activity com.example.androidhive.AllProductsActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@2afca938 that was originally added here
  01-26 18:14:36.566: E/WindowManager(12395):     at android.view.ViewRoot.&lt;init&gt;(ViewRoot.java:265)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.app.Dialog.show(Dialog.java:241)
  01-26 18:14:36.566: E/WindowManager(12395):     at com.example.androidhive.AllProductsActivity$LoadAllProducts.onPreExecute(AllProductsActivity.java:116)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.os.AsyncTask.execute(AsyncTask.java:391)
  01-26 18:14:36.566: E/WindowManager(12395):     at com.example.androidhive.AllProductsActivity.onCreate(AllProductsActivity.java:57)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.app.ActivityThread.access$1500(ActivityThread.java:121)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.os.Handler.dispatchMessage(Handler.java:99)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.os.Looper.loop(Looper.java:123)
  01-26 18:14:36.566: E/WindowManager(12395):     at android.app.ActivityThread.main(ActivityThread.java:3701)
  01-26 18:14:36.566: E/WindowManager(12395):     at java.lang.reflect.Method.invokeNative(Native Method)
  01-26 18:14:36.566: E/WindowManager(12395):     at java.lang.reflect.Method.invoke(Method.java:507)
  01-26 18:14:36.566: E/WindowManager(12395):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862)
  01-26 18:14:36.566: E/WindowManager(12395):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
  01-26 18:14:36.566: E/WindowManager(12395):     at dalvik.system.NativeStart.main(Native Method)
  01-26 18:16:02.626: I/Process(12395): Sending signal. PID: 12395 SIG: 9
  </code></pre>
  
  <p>Thanks!</p>
  
  <p>EDIT:Here is the code for AllProductsActivity.java:</p>
  
  <pre><code>public class AllProductsActivity extends ListActivity {
  
      // Progress Dialog
      private ProgressDialog pDialog;
  
      // Creating JSON Parser object
      JSONParser jParser = new JSONParser();
  
      ArrayList&lt;HashMap&lt;String, String&gt;&gt; productsList;
  
      // url to get all products list
      private static String url_all_products =    "http://xxx.xxx.xxx.xxx/include/get_all_products.php";
  
      // JSON Node names
      private static final String TAG_SUCCESS = "success";
      private static final String TAG_PRODUCTS = "products";
      private static final String TAG_PID = "pid";
      private static final String TAG_NAME = "name";
  
      // products JSONArray
      JSONArray products = null;
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.all_products);
  
          // Hashmap for ListView
          productsList = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;();
  
          // Loading products in Background Thread
          new LoadAllProducts().execute();
  
          // Get listview
          ListView lv = getListView();
  
          // on seleting single product
          // launching Edit Product Screen
          lv.setOnItemClickListener(new OnItemClickListener() {
  
              public void onItemClick(AdapterView&lt;?&gt; parent, View view,
                      int position, long id) {
                  // getting values from selected ListItem
                  String pid = ((TextView) view.findViewById(R.id.pid)).getText()
                          .toString();
  
                  // Starting new intent
                  Intent in = new Intent(getApplicationContext(),
                          EditProductActivity.class);
                  // sending pid to next activity
                  in.putExtra(TAG_PID, pid);
  
                  // starting new activity and expecting some response back
                  startActivityForResult(in, 100);
              }
          });
  
      }
  
      // Response from Edit Product Activity
      @Override
      protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          super.onActivityResult(requestCode, resultCode, data);
          // if result code 100
          if (resultCode == 100) {
              // if result code 100 is received 
              // means user edited/deleted product
              // reload this screen again
              Intent intent = getIntent();
              finish();
              startActivity(intent);
          }
  
      }
  
      /**
       * Background Async Task to Load all product by making HTTP Request
       * */
      class LoadAllProducts extends AsyncTask&lt;String, String, String&gt; {
  
          /**
           * Before starting background thread Show Progress Dialog
           * */
          @Override
          protected void onPreExecute() {
              super.onPreExecute();
              pDialog = new ProgressDialog(AllProductsActivity.this);
              pDialog.setMessage("Loading products. Please wait...");
              pDialog.setIndeterminate(false);
              pDialog.setCancelable(false);
              pDialog.show();
          }
  
          /**
           * getting All products from url
           * */
          protected String doInBackground(String... args) {
              // Building Parameters
              List&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;();
              // getting JSON string from URL
              JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
  
              // Check your log cat for JSON reponse
               Log.d("All Products: ", json.toString()); 
  
              try {
                  // Checking for SUCCESS TAG
                  int success = json.getInt(TAG_SUCCESS); 
  
                  if (success == 1) {
                      // products found
                      // Getting Array of Products
                      products = json.getJSONArray(TAG_PRODUCTS);
  
                      // looping through All Products
                      for (int i = 0; i &lt; products.length(); i++) {
                          JSONObject c = products.getJSONObject(i);
  
                          // Storing each json item in variable
                          String id = c.getString(TAG_PID);
                          String name = c.getString(TAG_NAME);
  
                          // creating new HashMap
                          HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;();
  
                          // adding each child node to HashMap key =&gt; value
                          map.put(TAG_PID, id);
                          map.put(TAG_NAME, name);
  
                          // adding HashList to ArrayList
                          productsList.add(map);
                      }
                  } else {
                      // no products found
                      // Launch Add New product Activity
                      Intent i = new Intent(getApplicationContext(),
                              NewProductActivity.class);
                      // Closing all previous activities
                      i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                      startActivity(i);
                  }
              } catch (JSONException e) {
                  e.printStackTrace();
              }
  
              return null;
          }
  
          /**
           * After completing background task Dismiss the progress dialog
           * **/
          protected void onPostExecute(String file_url) {
              // dismiss the dialog after getting all products
              pDialog.dismiss();
              // updating UI from Background Thread
              runOnUiThread(new Runnable() {
                  public void run() {
                      /**
                       * Updating parsed JSON data into ListView
                       * */
                      ListAdapter adapter = new SimpleAdapter(
                              AllProductsActivity.this, productsList,
                              R.layout.list_item, new String[] { TAG_PID,
                                      TAG_NAME},
                              new int[] { R.id.pid, R.id.name });
                      // updating listview
                      setListAdapter(adapter);
                  }
              });
  
          }
  
      }
  }
  </code></pre>