android-support-preference: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer SeekBarPreference.onSetInitialValue

Can you please look into this crash? From time to time I see this crash reported, but it’s a rare one.

Fatal Exception: java.lang.RuntimeException: Unable to start activity ComponentInfo{.MyActivity}: java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2984)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
       at android.app.ActivityThread.-wrap14(ActivityThread.java)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:154)
       at android.app.ActivityThread.main(ActivityThread.java:6776)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
Caused by java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer
       at android.app.SharedPreferencesImpl.getInt(SharedPreferencesImpl.java:242)
       at android.support.v7.preference.Preference.getPersistedInt(Preference.java:1709)
       at net.xpece.android.support.preference.SeekBarPreference.onSetInitialValue(SeekBarPreference.java:274)
       at android.support.v7.preference.Preference.dispatchSetInitialValue(Preference.java:6517)
       at android.support.v7.preference.Preference.onAttachedToHierarchy(Preference.java:1257)
       at android.support.v7.preference.PreferenceGroup.addPreference(PreferenceGroup.java:194)
       at android.support.v7.preference.XpPreferenceInflater.android.support.v7.preference.PreferenceGroup.addItemFromInflater(XpPreferenceInflater.java:4126)
       at android.support.v7.preference.XpPreferenceInflater.rInflate(XpPreferenceInflater.java:293)
       at android.support.v7.preference.XpPreferenceInflater.rInflate(XpPreferenceInflater.java:293)
       at android.support.v7.preference.XpPreferenceInflater.inflate(XpPreferenceInflater.java:103)
       at android.support.v7.preference.PreferenceInflater.inflate$7af30e91(PreferenceInflater.java:112)
       at android.support.v7.preference.XpPreferenceManager.inflateFromResource$6154c3e6(XpPreferenceManager.java:67)
       at .MyFragment.android.support.v7.preference.PreferenceFragmentCompat.addPreferencesFromResource(MyFragment.java:9432)
       at android.support.v7.preference.XpPreferenceFragment.onCreatePreferences(XpPreferenceFragment.java:54)
       at android.support.v7.preference.PreferenceFragmentCompat.onCreate(PreferenceFragmentCompat.java:224)
       at android.support.v4.app.Fragment.performCreate(Fragment.java:2329)
       at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1377)
       at android.support.v4.app.FragmentTransition.addToFirstInLastOut(FragmentTransition.java:1109)
       at android.support.v4.app.FragmentTransition.calculateFragments(FragmentTransition.java:996)
       at android.support.v4.app.FragmentTransition.startTransitions(FragmentTransition.java:99)
       at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2364)
       at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2322)
       at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2229)
       at android.support.v4.app.FragmentManagerImpl.dispatchStateChange(FragmentManager.java:3221)
       at android.support.v4.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:3171)
       at android.support.v4.app.FragmentActivity.android.support.v4.app.FragmentController.dispatchActivityCreated(FragmentActivity.java:16192)
       at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
       at .MyActivity.onStart(MyActivity.java)
       at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1256)
       at android.app.Activity.performStart(Activity.java:6972)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2937)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3045)
       at android.app.ActivityThread.-wrap14(ActivityThread.java)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1642)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:154)
       at android.app.ActivityThread.main(ActivityThread.java:6776)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)

About this issue

Original URL
State: open
Created 7 years ago
Comments: 22 (9 by maintainers)

Most upvoted comments

It’s not XML related, it crashes because it’s trying to load the value from hard drive and it finds a String instead of the expected integer.

Did you by any chance use the same key “volume” for anything else? Or did you edit shared preferences manually? This is the only thing that comes to my mind…

Unless… “volume” is a very generic name, some library you’re using may be writing in your default shared preference file.

Can it be that android:defaultValue is not set in XML?

In that case the default value is 0.

consp1racy on Sep 30, 2017

just uninstall your app and then install it. look like you saved string on that key before. or change the key or clear app data then check

ammadmunir on Jun 5, 2020