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Editorial Team
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Asked: 2026-05-26T13:53:52+00:00

I am trying to create a dialog preference as follows <DialogPreference android:key=cachePref android:dialogMessage=Testing message

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I am trying to create a dialog preference as follows

<DialogPreference
    android:key="cachePref"
    android:dialogMessage="Testing message"
    android:dialogTitle="Title Test"
    android:positiveButtonText="positive"
    android:summary="Clear images save to disk"
    android:title="Clear Image Cache" />

But when the activity runs it force closes with the following error

11-01 01:21:18.820: E/AndroidRuntime(19644): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bakasura/com.bakasura.SettingsPreferences}: android.view.InflateException: Binary XML file line #71: Error inflating class java.lang.reflect.Constructor
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1 Answer

  1. Editorial Team

    This looks like Android Issue 3972: InstantiationException when using DialogPreference:

    DialogPreference always was an abstract class and as such it should not have been able to be instantiated — but a bug in reflection code allowed to do so anyway up to Android 1.6. After that, it correctly throws an exception.

    A work around is to create a custom class extending DialogPreference and use that instead as suggested in comment 9 of the issue.

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