App crash when setting personal API Key

[matrujillo10]

Hi,

I just found a bug referred to the settings activity.

I went to the settings activity. The app language was "System language" at this moment. I changed the language to "Español", and then try to select the option "Personal API Key". Nonetheless, the app crash and the logcat register this:

2019-11-23 15:41:17.698 8285-8285/com.haringeymobile.ukweather E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.haringeymobile.ukweather, PID: 8285
    java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
        at android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1864)
        at android.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1887)
        at android.app.BackStackRecord.commitInternal(BackStackRecord.java:688)
        at android.app.BackStackRecord.commit(BackStackRecord.java:646)
        at android.app.DialogFragment.show(DialogFragment.java:230)
        at com.haringeymobile.ukweather.settings.SettingsActivity.showEnterPersonalApiKeyDialog(SettingsActivity.java:97)
        at com.haringeymobile.ukweather.settings.SettingsActivity.onSharedPreferenceChanged(SettingsActivity.java:83)
        at android.app.SharedPreferencesImpl$EditorImpl.notifyListeners(SharedPreferencesImpl.java:560)
        at android.app.SharedPreferencesImpl$EditorImpl.apply(SharedPreferencesImpl.java:443)
        at android.preference.Preference.tryCommit(Preference.java:1589)
        at android.preference.Preference.persistBoolean(Preference.java:1893)
        at android.preference.TwoStatePreference.setChecked(TwoStatePreference.java:81)
        at android.preference.TwoStatePreference.onClick(TwoStatePreference.java:66)
        at android.preference.Preference.performClick(Preference.java:1134)
        at android.preference.PreferenceScreen.onItemClick(PreferenceScreen.java:249)
        at android.widget.AdapterView.performItemClick(AdapterView.java:318)
        at android.widget.AbsListView.performItemClick(AbsListView.java:1165)
        at android.widget.AbsListView$PerformClick.run(AbsListView.java:3134)
        at android.widget.AbsListView$3.run(AbsListView.java:4049)
        at android.os.Handler.handleCallback(Handler.java:789)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6541)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

I made a flow diagram to replicate the bug:

This also happen when I change the app theme instead of language, and then try to set a personal API Key.