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POListPreference: use string-array as Entry and integer-array as Entry Values doesn't work
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  1. POListPreference: use string-array as Entry and integer-array as Entry Values doesn't work
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    copied!<p>I'm using in a settings.xml file a ListPreference. I want to show the user a list of 3 options to select. When the user chooses one of the options in the Settings, I get this error:</p> <pre><code>java.lang.NullPointerException at android.preference.ListPreference.onDialogClosed(ListPreference.java:264) at android.preference.DialogPreference.onDismiss(DialogPreference.java:381) at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1228) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4424) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>This is the code of the ListPreference:</p> <pre><code>&lt;ListPreference android:entries="@array/date_alignement" android:entryValues="@array/date_alignement_values" android:key="settings_date_alignement" android:summary="@string/settings_date_alignement_summary" android:title="@string/settings_date_alignement_title" /&gt; </code></pre> <p>And here are the arrays I use to populate the entries:</p> <pre><code>&lt;string-array name="date_alignement"&gt; &lt;item&gt;"Top"&lt;/item&gt; &lt;item&gt;"Center"&lt;/item&gt; &lt;item&gt;"Bottom"&lt;/item&gt; &lt;/string-array&gt; &lt;integer-array name="date_alignement_values"&gt; &lt;item &gt;0&lt;/item&gt; &lt;item &gt;1&lt;/item&gt; &lt;item &gt;2&lt;/item&gt; &lt;/integer-array&gt; </code></pre> <p>In my onSharedPreferenceChanged I use those values in this way:</p> <pre><code>@Override public void onSharedPreferenceChanged( SharedPreferences sharedPreferences, String key) { //Text mAlignment = mPrefs.getInt(PREF_ALIGNMENT, 1); switch (mAlignment) { case 0: offsetY = mHeight/3.0f; break; case 2: offsetY = mHeight*2.0f/3.0f; break; default: offsetY = mHeight/2.0f; break; } } </code></pre> <p>If I use another string-array for the <strong>entryValues</strong> it works. For example if I use the same string array as values and entries:</p> <pre><code> android:entries="@array/date_alignement" android:entryValues="@array/date_alignement" </code></pre> <p>then I have to change my code a little but it works:</p> <pre><code> if(mAlignment.equalsIgnoreCase("center")) { offsetY = mHeight/2.0f; } else if(mAlignment.equalsIgnoreCase("top")) { offsetY = mHeight/3.0f; } else if(mAlignment.equalsIgnoreCase("bottom")) { offsetY = mHeight*2.0f/3.0f; } </code></pre> <p>Why I can't use a string-array and an integer-array for a ListPreference entries and values?</p>
 

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