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POInitiating a ListAdapter Throws NullPointerException
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  1. POInitiating a ListAdapter Throws NullPointerException
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    copied!<p>When I'm initiating a <code>ListAdapter&lt;String&gt;</code> like this everything goes fine:</p> <p><strong>Initializing Variables</strong></p> <pre><code>List&lt;String&gt; deviceList = new LinkedList&lt;String&gt;(); ArrayAdapter&lt;String&gt; listAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.deviceconnect, android.R.layout.simple_list_item_1, deviceList); </code></pre> <p>But when I add something to the list like this:</p> <p><strong>Added an item to the list</strong></p> <pre><code>List&lt;String&gt; deviceList = new LinkedList&lt;String&gt;(); deviceList.add("Test"); ArrayAdapter&lt;String&gt; listAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.deviceconnect, android.R.layout.simple_list_item_1, deviceList); </code></pre> <p>It throws a null pointer exception like this:</p> <p><strong>Exception</strong></p> <pre><code>09-11 22:02:40.267: E/AndroidRuntime(3052): java.lang.NullPointerException 09-11 22:02:40.267: E/AndroidRuntime(3052): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:392) 09-11 22:02:40.267: E/AndroidRuntime(3052): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:362) 09-11 22:02:40.267: E/AndroidRuntime(3052): at android.widget.AbsListView.obtainView(AbsListView.java:2267) 09-11 22:02:40.267: E/AndroidRuntime(3052): at android.widget.ListView.makeAndAddView(ListView.java:1769) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.ListView.fillDown(ListView.java:672) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.ListView.fillFromTop(ListView.java:733) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.ListView.layoutChildren(ListView.java:1622) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.AbsListView.onLayout(AbsListView.java:2102) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.View.layout(View.java:13754) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewGroup.layout(ViewGroup.java:4362) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:948) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.View.layout(View.java:13754) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewGroup.layout(ViewGroup.java:4362) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.View.layout(View.java:13754) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewGroup.layout(ViewGroup.java:4362) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1649) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1507) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.LinearLayout.onLayout(LinearLayout.java:1420) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.View.layout(View.java:13754) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewGroup.layout(ViewGroup.java:4362) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.View.layout(View.java:13754) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewGroup.layout(ViewGroup.java:4362) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1866) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1687) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:998) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4212) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.Choreographer.doCallbacks(Choreographer.java:555) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.Choreographer.doFrame(Choreographer.java:525) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.os.Handler.handleCallback(Handler.java:615) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.os.Handler.dispatchMessage(Handler.java:92) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.os.Looper.loop(Looper.java:137) 09-11 22:16:54.689: E/AndroidRuntime(6064): at android.app.ActivityThread.main(ActivityThread.java:4745) 09-11 22:16:54.689: E/AndroidRuntime(6064): at java.lang.reflect.Method.invokeNative(Native Method) 09-11 22:16:54.689: E/AndroidRuntime(6064): at java.lang.reflect.Method.invoke(Method.java:511) 09-11 22:16:54.689: E/AndroidRuntime(6064): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 09-11 22:16:54.689: E/AndroidRuntime(6064): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 09-11 22:16:54.689: E/AndroidRuntime(6064): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>Could somebody help me out on this? Thanks.</p>
 

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