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PONull pointer error using Expandable list in Fragments
 

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  1. PONull pointer error using Expandable list in Fragments
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    <p>I'm trying to create an expandable list in one of the tab fragments. I'm getting the null pointer error, but I can't fix it... The problem occurs in this section: expandableListView.setAdapter(adapter); Any help would be appreciated.</p> <p>StackTrace (error):</p> <pre><code> 10-20 12:39:31.603: E/AndroidRuntime(3478): FATAL EXCEPTION: main 10-20 12:39:31.603: E/AndroidRuntime(3478): java.lang.NullPointerException 10-20 12:39:31.603: E/AndroidRuntime(3478): at com.margaret.app.easypeasycooking.CountryAdapter.getGroupCount(CountryAdapter.java:119) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.widget.ExpandableListConnector.getCount(ExpandableListConnector.java:397) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.widget.ListView.setAdapter(ListView.java:463) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.widget.ExpandableListView.setAdapter(ExpandableListView.java:599) 10-20 12:39:31.603: E/AndroidRuntime(3478): at com.margaret.app.easypeasycooking.ShoppingList.onCreateView(ShoppingList.java:37) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.app.Fragment.performCreateView(Fragment.java:1695) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:885) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.app.BackStackRecord.run(BackStackRecord.java:682) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.app.FragmentManagerImpl$1.run(FragmentManager.java:441) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.os.Handler.handleCallback(Handler.java:730) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.os.Handler.dispatchMessage(Handler.java:92) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.os.Looper.loop(Looper.java:137) 10-20 12:39:31.603: E/AndroidRuntime(3478): at android.app.ActivityThread.main(ActivityThread.java:5103) 10-20 12:39:31.603: E/AndroidRuntime(3478): at java.lang.reflect.Method.invokeNative(Native Method) 10-20 12:39:31.603: E/AndroidRuntime(3478): at java.lang.reflect.Method.invoke(Method.java:525) 10-20 12:39:31.603: E/AndroidRuntime(3478): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 10-20 12:39:31.603: E/AndroidRuntime(3478): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 10-20 12:39:31.603: E/AndroidRuntime(3478): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>THe XML:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:id="@+id/shopping"&gt; &lt;ExpandableListView android:id="@+id/elvShoppingList" android:layout_width="wrap_content" android:layout_height="400dp" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" &gt; &lt;/ExpandableListView&gt; &lt;RadioButton android:id="@+id/radioButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_marginLeft="18dp" android:text="RadioButton" /&gt; &lt;/RelativeLayout&gt; </code></pre>
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    1. This table or related slice is empty.
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    1. USAlfie
    1. USAlfie
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COPlease post the stack trace from logcat. It shows **exactly** where the error is. You should also learn to use the debugger. NullPointerExceptions are very easy to find and fix and the debugger will enable you to do so in minutes.
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      1. PONull pointer error using Expandable list in Fragments
      1. USSimon
    2. COCan you post the stack trace?
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      1. PONull pointer error using Expandable list in Fragments
      1. USAdam Toth
    3. CO@AdamToth Just added the stack trace.
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      1. PONull pointer error using Expandable list in Fragments
      1. USAlfie
 

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