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POException thrown during TypedArray#getTextArray()
 

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  1. POException thrown during TypedArray#getTextArray()
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    <p>This is my first time creating a custom view and I'm trying to populate it with entries via XML -- in a manner similar to a Spinner. I'm obviously doing something wrong here, but I've styled my approach after the Spinner, so I fail to see what has gone wrong.</p> <p>To explain the intent of this code, I'm creating a custom preference list. MultiChooserOption is an item that allows a user to select multiple things from a list of options. TextOption simply defines the view that will be displayed in the list, i.e.- ther e is a caption and some other element, for subclasses of TextOption the other element will be text as opposed to a widget (checkbox, etc.).</p> <p>Below is the source for everything that should have any impact on the way I've built this as well as my logcat output.</p> <p>attrs.xml</p> <pre><code>&lt;resources&gt; &lt;attr name="caption" format="string" /&gt; &lt;attr name="options" format="reference" /&gt; &lt;declare-styleable name="TextOption"&gt; &lt;attr name="caption" /&gt; &lt;attr name="text" format="string" /&gt; &lt;/declare-styleable&gt; &lt;declare-styleable name="MultiChooserOption"&gt; &lt;attr name="options" /&gt; &lt;/declare-styleable&gt; &lt;/resources&gt; </code></pre> <p>MultiChooserOption.java</p> <pre><code>public class MultiChooserOption extends TextOption&lt;CharSequence&gt; { public static final String TAG = MultiChooserOption.class.getSimpleName(); private List&lt;CharSequence&gt; options; private MultiChoiceListView&lt;CharSequence&gt; choiceView; public MultiChooserOption(Context context) { super( context ); } public MultiChooserOption(Context context, AttributeSet attrs) { super( context, attrs ); initOptions( attrs ); } private void initOptions( AttributeSet attrs ) { TypedArray attributesArray = getContext().obtainStyledAttributes( attrs, R.styleable.TextOption, 0, 0 ); try { // this line is where things go wrong CharSequence[] optionsArray = attributesArray.getTextArray( R.styleable.MultiChooserOption_options ); setOptions( Arrays.asList( optionsArray ) ); } catch (NotFoundException e) { Log.e( TAG, e.getMessage(), e ); } finally { attributesArray.recycle(); } } } </code></pre> <p>TextOption.java</p> <pre><code>public abstract class TextOption&lt;T&gt; extends LinearLayout { public static final String TAG = TextOption.class.getSimpleName(); private TextView captionTextView; private TextView valueTextView; private String caption; private String value; public TextOption(Context context) { super( context ); init(); } public TextOption(Context context, AttributeSet attrs) { super( context, attrs ); TypedArray attributesArray = context.obtainStyledAttributes( attrs, R.styleable.TextOption, 0, 0 ); try { setCaption( attributesArray.getString( R.styleable.TextOption_caption ) ); setValue( attributesArray.getString( R.styleable.TextOption_text ) ); } finally { attributesArray.recycle(); } init(); } } </code></pre> <p>options_fragment.xml</p> <pre><code>&lt;ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:custom="http://schemas.android.com/apk/res/com.mypackage" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/white" &gt; &lt;LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" &gt; &lt;com.mypackage.view.MultiChooserOption android:id="@+id/multichooser" android:layout_width="match_parent" android:layout_height="wrap_content" custom:caption="@string/multichooser_caption" custom:options="@array/multichooser_options" /&gt; &lt;/LinearLayout&gt; &lt;/ScrollView&gt; </code></pre> <p>arrays.xml</p> <pre><code>&lt;resources&gt; &lt;string-array name="multichooser_options"&gt; &lt;item&gt;@string/option1&lt;/item&gt; &lt;item&gt;@string/option2&lt;/item&gt; &lt;item&gt;@string/option3&lt;/item&gt; &lt;item&gt;@string/option4&lt;/item&gt; &lt;item&gt;@string/option5&lt;/item&gt; &lt;item&gt;@string/option6&lt;/item&gt; &lt;/string-array&gt; &lt;/resources&gt; </code></pre> <p>strings.xml</p> <pre><code>&lt;resources&gt; &lt;string name="multichooser_caption"&gt;MultiChooser&lt;/string&gt; &lt;string name="option1"&gt;option 1&lt;/string&gt; &lt;string name="option2"&gt;option 2&lt;/string&gt; &lt;string name="option3"&gt;option 3&lt;/string&gt; &lt;string name="option4"&gt;option 4&lt;/string&gt; &lt;string name="option5"&gt;option 5&lt;/string&gt; &lt;string name="option6"&gt;option 6&lt;/string&gt; &lt;/resources&gt; </code></pre> <p>OptionsFragment.java</p> <pre><code>public class OptionsFragment extends RoboSherlockFragment { public static final String TAG = OptionsFragment.class.getSimpleName(); @Override public View onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState ) { View view = inflater.inflate( R.layout.options_fragment, container, false ); return view; } } </code></pre> <p>logcat output</p> <pre><code>09-18 20:52:36.940: E/AndroidRuntime(4237): FATAL EXCEPTION: main 09-18 20:52:36.940: E/AndroidRuntime(4237): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mypackage/com.mypackage.ui.OptionsActivity}: android.view.InflateException: Binary XML file line #44: Error inflating class com.mypackage.view.MultiChooserOption 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.ActivityThread.access$600(ActivityThread.java:141) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.os.Handler.dispatchMessage(Handler.java:99) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.os.Looper.loop(Looper.java:137) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.ActivityThread.main(ActivityThread.java:5041) 09-18 20:52:36.940: E/AndroidRuntime(4237): at java.lang.reflect.Method.invokeNative(Native Method) 09-18 20:52:36.940: E/AndroidRuntime(4237): at java.lang.reflect.Method.invoke(Method.java:511) 09-18 20:52:36.940: E/AndroidRuntime(4237): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 09-18 20:52:36.940: E/AndroidRuntime(4237): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 09-18 20:52:36.940: E/AndroidRuntime(4237): at dalvik.system.NativeStart.main(Native Method) 09-18 20:52:36.940: E/AndroidRuntime(4237): Caused by: android.view.InflateException: Binary XML file line #44: Error inflating class com.mypackage.view.MultiChooserOption 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.view.LayoutInflater.createView(LayoutInflater.java:613) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.view.LayoutInflater.rInflate(LayoutInflater.java:749) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 09-18 20:52:36.940: E/AndroidRuntime(4237): at com.mypackage.ui.OptionsFragment.onCreateView(OptionsFragment.java:27) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:551) 09-18 20:52:36.940: E/AndroidRuntime(4237): at com.github.rtyley.android.sherlock.roboguice.activity.RoboSherlockFragmentActivity.onStart(RoboSherlockFragmentActivity.java:46) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1164) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.Activity.performStart(Activity.java:5114) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2153) 09-18 20:52:36.940: E/AndroidRuntime(4237): ... 11 more 09-18 20:52:36.940: E/AndroidRuntime(4237): Caused by: java.lang.reflect.InvocationTargetException 09-18 20:52:36.940: E/AndroidRuntime(4237): at java.lang.reflect.Constructor.constructNative(Native Method) 09-18 20:52:36.940: E/AndroidRuntime(4237): at java.lang.reflect.Constructor.newInstance(Constructor.java:417) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.view.LayoutInflater.createView(LayoutInflater.java:587) 09-18 20:52:36.940: E/AndroidRuntime(4237): ... 27 more 09-18 20:52:36.940: E/AndroidRuntime(4237): Caused by: java.lang.NullPointerException 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.content.res.AssetManager.getResourceTextArray(AssetManager.java:214) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.content.res.Resources.getTextArray(Resources.java:427) 09-18 20:52:36.940: E/AndroidRuntime(4237): at android.content.res.TypedArray.getTextArray(TypedArray.java:628) 09-18 20:52:36.940: E/AndroidRuntime(4237): at com.mypackage.view.MultiChooserOption.initOptions(MultiChooserOption.java:42) 09-18 20:52:36.940: E/AndroidRuntime(4237): at com.mypackage.view.MultiChooserOption.&lt;init&gt;(MultiChooserOption.java:32) 09-18 20:52:36.940: E/AndroidRuntime(4237): ... 30 more </code></pre> <p>So, when the line <code>CharSequence[] optionsArray = attributesArray.getTextArray( R.styleable.MultiChooserOption_options );</code> in MultiChooserOption executes, an exception is thrown and the whole shebang come crumbling down. As far as I know, I'm following Spinner as much as should matter. </p> <p>Please help me learn what I've done wrong here.</p>
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