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POclassCastException when sending multidimentioal arrayList in bundle
 

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  1. POclassCastException when sending multidimentioal arrayList in bundle
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    <p>I have an app that parses a JSON object and put the data in a 2D ArrayList of type TwoDimentionalArrayList.</p> <pre><code> public TwoDimentionalArrayList&lt;String&gt; getRota(String carerID, String date){ try { JSONObject jsonObject1 = new JSONObject(tok3); int count = jsonObject1.names().length(); for(int i = 0; i &lt; count; i++){ String s = new Integer(i).toString(); JSONObject jsonobject2 = (JSONObject) jsonObject1.get(s); String startdate = jsonobject2.getString("StartDate"); String duration = jsonobject2.getString("Duration"); String callStatusName = jsonobject2.getString("CallStatusName"); String clientForeName = jsonobject2.getString("ClientForename"); String clientSurName = jsonobject2.getString("ClientSurname"); Log.e(TAG, "startdate = " + startdate); Log.e(TAG, "duration = " + duration); Log.e(TAG, "callStatusName = " + callStatusName); Log.e(TAG, "clientForeName = " + clientForeName); Log.e(TAG, "clientsurName = " + clientSurName); ArrayList&lt;String&gt; arr = new ArrayList&lt;String&gt;(); arr.add(startdate); arr.add(duration); arr.add(callStatusName); arr.add(clientForeName); arr.add(clientSurName); arrayList.add(i, arr); } return arrayList; }// end of getRota class TwoDimentionalArrayList&lt;T&gt; extends ArrayList&lt;ArrayList&lt;T&gt;&gt; { private static final long serialVersionUID = 1L; public void addToInnerArray(int index, T element) { while (index &gt;= this.size()) { this.add(new ArrayList&lt;T&gt;()); } this.get(index).add(element); } public void addToInnerArray(int index, int index2, T element) { while (index &gt;= this.size()) { this.add(new ArrayList&lt;T&gt;()); } ArrayList&lt;T&gt; inner = this.get(index); while (index2 &gt;= inner.size()) { inner.add(null); } inner.set(index2, element); } } </code></pre> <p>.</p> <p>I send the arryList in the following way.</p> <pre><code> Bundle b = new Bundle(); b.putSerializable("rotaArray", rotaArray); intent.putExtra("rotaArrayBundle", b); startActivity(intent); </code></pre> <p>And then retrieve it in another Activity like this.</p> <pre><code>intent = this.getIntent(); Bundle bundle = intent.getBundleExtra("rotaArrayBundle"); @SuppressWarnings("unchecked") TwoDimentionalArrayList&lt;String&gt; array = (TwoDimentionalArrayList&lt;String&gt;) bundle.get("rotaArray"); </code></pre> <p>The app seems to have a problem casting the array to a TwoDimentionalArrayList which is an inner class of the one that parses the JSON. Here's the Exception.</p> <pre><code>09-20 11:23:13.797: E/AndroidRuntime(9743): FATAL EXCEPTION: main 09-20 11:23:13.797: E/AndroidRuntime(9743): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.carefreegroup/com.carefreegroup.GetRota}: java.lang.ClassCastException: java.util.ArrayList cannot be cast to com.carefreegroup.LoginWebservice$TwoDimentionalArrayList 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2225) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2260) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.ActivityThread.access$600(ActivityThread.java:139) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1277) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.os.Handler.dispatchMessage(Handler.java:99) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.os.Looper.loop(Looper.java:156) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.ActivityThread.main(ActivityThread.java:5045) 09-20 11:23:13.797: E/AndroidRuntime(9743): at java.lang.reflect.Method.invokeNative(Native Method) 09-20 11:23:13.797: E/AndroidRuntime(9743): at java.lang.reflect.Method.invoke(Method.java:511) 09-20 11:23:13.797: E/AndroidRuntime(9743): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 09-20 11:23:13.797: E/AndroidRuntime(9743): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 09-20 11:23:13.797: E/AndroidRuntime(9743): at dalvik.system.NativeStart.main(Native Method) 09-20 11:23:13.797: E/AndroidRuntime(9743): Caused by: java.lang.ClassCastException: java.util.ArrayList cannot be cast to com.carefreegroup.LoginWebservice$TwoDimentionalArrayList 09-20 11:23:13.797: E/AndroidRuntime(9743): at com.carefreegroup.GetRota.onCreate(GetRota.java:27) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.Activity.performCreate(Activity.java:4543) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1071) 09-20 11:23:13.797: E/AndroidRuntime(9743): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2181) 09-20 11:23:13.797: E/AndroidRuntime(9743): ... 11 more </code></pre>
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    1. CO`arrayList.add(i, arr);` Where does it declared?
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      1. USteoREtik
    2. CO@teoREtik as an instance variable of that class and instanciated in it's constructor
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    3. CODo you declare it as `TwoDimentionalArrayList<String>`?
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