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PONull pointer Error in Async Task
 

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  1. PONull pointer Error in Async Task
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    <p>I am getting a null pointer exception while handling JSON data, i have checked that JSON which i am getting is correct. further i want to store this data in hash map and retrive it one by one as per the requirements.</p> <pre><code> public ProgressDialog pDialognew; static JSONParser jParser = new JSONParser(); ArrayList&lt;HashMap&lt;String, String&gt;&gt; allValueList; class SearchData extends AsyncTask&lt;String, String, String&gt; { @Override protected void onPreExecute() { super.onPreExecute(); pDialognew = new ProgressDialog(Activity.this); pDialognew.setMessage("Loading. Please wait..."); pDialognew.setIndeterminate(false); pDialognew.setCancelable(true); pDialognew.show(); } @Override protected String doInBackground(String... params) { runOnUiThread(new Runnable() { @Override public void run() { int success; try { List&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;(); params.add(new BasicNameValuePair("match",pName)); JSONObject json = jParser.makeHttpRequest(GlobalServerLocation.url_pol, "GET", params); success = json.getInt("success"); if (success == 1) { JSONArray productObj = json.getJSONArray("object"); // JSON Array Log.i("val", productObj.toString()); // Correct JSON total = productObj.length(); // Correct number of rows Log.i("Len", String.valueOf(total)); for (int j = 0; j &lt; productObj.length(); j++) { JSONObject productnew = productObj.getJSONObject(j); String LS = productnew.getString(TAG_LS); String CN = productnew.getString(TAG_CN); String SN = productnew.getString(TAG_SN); String PN = productnew.getString(TAG_PN); HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;(); map.put(TAG_LS, LS); map.put(TAG_CN, CN); map.put(TAG_SN, SN); map.put(TAG_PN, PN); allValueList.add(map); } } else { Log.i("Error", " Some Error from Php Script"); } } catch (JSONException e) { Log.i("Error", e.toString()); } } }); return null; } @Override protected void onPostExecute(String file_url) { pDialognew.dismiss(); // Line 113 } } </code></pre> <hr> <pre><code>08-23 17:17:33.449: E/AndroidRuntime(31930): FATAL EXCEPTION: main 08-23 17:17:33.449: E/AndroidRuntime(31930): java.lang.NullPointerException 08-23 17:17:33.449: E/AndroidRuntime(31930): at my.india.our.app$SearchData$1.run(app.java:113) 08-23 17:17:33.449: E/AndroidRuntime(31930): at android.os.Handler.handleCallback(Handler.java:587) 08-23 17:17:33.449: E/AndroidRuntime(31930): at android.os.Handler.dispatchMessage(Handler.java:92) 08-23 17:17:33.449: E/AndroidRuntime(31930): at android.os.Looper.loop(Looper.java:123) 08-23 17:17:33.449: E/AndroidRuntime(31930): at android.app.ActivityThread.main(ActivityThread.java:3729) 08-23 17:17:33.449: E/AndroidRuntime(31930): at java.lang.reflect.Method.invokeNative(Native Method) 08-23 17:17:33.449: E/AndroidRuntime(31930): at java.lang.reflect.Method.invoke(Method.java:507) 08-23 17:17:33.449: E/AndroidRuntime(31930): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:874) 08-23 17:17:33.449: E/AndroidRuntime(31930): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:632) 08-23 17:17:33.449: E/AndroidRuntime(31930): at dalvik.system.NativeStart.main(Native Method) </code></pre> <hr> <p>If any other part of Code is required let me know.</p>
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    1. COwhat part of the code is line 113 of app.java
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    2. COpDialognew.dismiss(); // this is line 113
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    3. COseems `pDialognew` is not an object, is sometihng else accessing/dismissing/destroying it before postexecute executes
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