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POArrayList Add item. What's Wrong With My Code?
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  1. POArrayList Add item. What's Wrong With My Code?
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    copied!<p>Getting error while adding element to ArrayList. I am getting error on <code>mArrayList.add(oneToolkit);</code> while in my other activities same method is working fine. when I comment <code>mArrayList.add(oneToolkit);</code> every thing work fine. Foolowing is the my Code of AsyncTask and methods called in that.</p> <pre><code>private void getToolkits(){ JSONObject jsonObject = JSONParser.getJsonObject(URL); Log.d(Constants.TAG,"jsonObject: "+jsonObject.toString()); try { JSONArray AllResults = jsonObject.getJSONArray("AppTrainee"); //Log.d(Constants.TAG,"External Training: "+ AllResults.toString() + " Length: "+ AllResults.length()); JSONObject newObject = AllResults.getJSONObject(0); JSONArray newArray = newObject.getJSONArray("Training Toolkits"); Log.d(Constants.TAG, "Lenght: "+newArray.length()); for(int i=0;i&lt;newArray.length();i++){ JSONObject oneResult = newArray.getJSONObject(i); Log.d(Constants.TAG,"Name "+i+" : "+oneResult.getString("ToolkitName")); Toolkit oneToolkit = new Toolkit(); oneToolkit.setToolkitID(Integer.parseInt(oneResult.getString("ToolkitID"))); oneToolkit.setToolkitName(oneResult.getString("ToolkitName")); oneToolkit.setDisplayOrder(Integer.parseInt(oneResult.getString("DisplayOrder"))); oneToolkit.setButtonImage(oneResult.getString("Tk_ButtonImage")); mArrayList.add(oneToolkit); } Log.d(Constants.TAG, "Done"); } catch (JSONException e) { e.printStackTrace(); } } private void showToolkits(){ //mAdapter = new ToolkitsAdapter(getApplicationContext(), mArrayList); //mGridView.setAdapter(mAdapter); } private class GetDataTask extends AsyncTask&lt;String, Void, Void&gt; { private final ProgressDialog dialog = new ProgressDialog(ToolkitsActivity.this); // can use UI thread here protected void onPreExecute() { this.dialog.setMessage("Loading..."); this.dialog.setCancelable(false); this.dialog.show(); } // automatically done on worker thread (separate from UI thread) protected Void doInBackground(final String... args) { getToolkits(); return null; } // can use UI thread here protected void onPostExecute(final Void unused) { if (this.dialog.isShowing()) { this.dialog.dismiss(); showToolkits(); } } } </code></pre> <p>Logcat</p> <pre><code>03-07 22:25:27.758: W/dalvikvm(1041): threadid=9: thread exiting with uncaught exception (group=0x40015560) 03-07 22:25:27.788: E/AndroidRuntime(1041): FATAL EXCEPTION: AsyncTask #1 03-07 22:25:27.788: E/AndroidRuntime(1041): java.lang.RuntimeException: An error occured while executing doInBackground() 03-07 22:25:27.788: E/AndroidRuntime(1041): at android.os.AsyncTask$3.done(AsyncTask.java:200) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.util.concurrent.FutureTask.run(FutureTask.java:138) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.lang.Thread.run(Thread.java:1019) 03-07 22:25:27.788: E/AndroidRuntime(1041): Caused by: java.lang.NullPointerException 03-07 22:25:27.788: E/AndroidRuntime(1041): at uk.org.humanfocus.ToolkitsActivity.getToolkits(ToolkitsActivity.java:60) 03-07 22:25:27.788: E/AndroidRuntime(1041): at uk.org.humanfocus.ToolkitsActivity.access$0(ToolkitsActivity.java:43) 03-07 22:25:27.788: E/AndroidRuntime(1041): at uk.org.humanfocus.ToolkitsActivity$GetDataTask.doInBackground(ToolkitsActivity.java:87) 03-07 22:25:27.788: E/AndroidRuntime(1041): at uk.org.humanfocus.ToolkitsActivity$GetDataTask.doInBackground(ToolkitsActivity.java:1) 03-07 22:25:27.788: E/AndroidRuntime(1041): at android.os.AsyncTask$2.call(AsyncTask.java:185) 03-07 22:25:27.788: E/AndroidRuntime(1041): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 03-07 22:25:27.788: E/AndroidRuntime(1041): ... 4 more 03-07 22:25:30.008: E/WindowManager(1041): Activity uk.org.humanfocus.ToolkitsActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4052f1a0 that was originally added here 03-07 22:25:30.008: E/WindowManager(1041): android.view.WindowLeaked: Activity uk.org.humanfocus.ToolkitsActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@4052f1a0 that was originally added here 03-07 22:25:30.008: E/WindowManager(1041): at android.view.ViewRoot.&lt;init&gt;(ViewRoot.java:258) 03-07 22:25:30.008: E/WindowManager(1041): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 03-07 22:25:30.008: E/WindowManager(1041): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 03-07 22:25:30.008: E/WindowManager(1041): at android.view.Window$LocalWindowManager.addView(Window.java:424) 03-07 22:25:30.008: E/WindowManager(1041): at android.app.Dialog.show(Dialog.java:241) 03-07 22:25:30.008: E/WindowManager(1041): at uk.org.humanfocus.ToolkitsActivity$GetDataTask.onPreExecute(ToolkitsActivity.java:82) 03-07 22:25:30.008: E/WindowManager(1041): at android.os.AsyncTask.execute(AsyncTask.java:391) 03-07 22:25:30.008: E/WindowManager(1041): at uk.org.humanfocus.ToolkitsActivity.onCreate(ToolkitsActivity.java:39) 03-07 22:25:30.008: E/WindowManager(1041): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 03-07 22:25:30.008: E/WindowManager(1041): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 03-07 22:25:30.008: E/WindowManager(1041): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 03-07 22:25:30.008: E/WindowManager(1041): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 03-07 22:25:30.008: E/WindowManager(1041): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 03-07 22:25:30.008: E/WindowManager(1041): at android.os.Handler.dispatchMessage(Handler.java:99) 03-07 22:25:30.008: E/WindowManager(1041): at android.os.Looper.loop(Looper.java:123) 03-07 22:25:30.008: E/WindowManager(1041): at android.app.ActivityThread.main(ActivityThread.java:3683) 03-07 22:25:30.008: E/WindowManager(1041): at java.lang.reflect.Method.invokeNative(Native Method) 03-07 22:25:30.008: E/WindowManager(1041): at java.lang.reflect.Method.invoke(Method.java:507) 03-07 22:25:30.008: E/WindowManager(1041): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 03-07 22:25:30.008: E/WindowManager(1041): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 03-07 22:25:30.008: E/WindowManager(1041): at dalvik.system.NativeStart.main(Native Method) </code></pre>
 

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