--------- beginning of system
2018-12-01 15:27:17.651 1672-1687/system_process I/ActivityManager: Config changes=480 {1.0 310mcc260mnc [en_US] ldltr sw320dp w320dp h509dp 240dpi nrml long port finger qwerty/v/v -nav/h s.112}
2018-12-01 15:27:17.658 1672-1719/system_process I/InputReader: Reconfiguring input devices.  changes=0x00000004
2018-12-01 15:27:17.658 1672-1719/system_process I/InputReader: Device reconfigured: id=0, name='qwerty2', size 480x800, orientation 0, mode 1, display id 0
2018-12-01 15:27:17.698 11185-11203/livio.sandbox D/EGL_emulation: eglMakeCurrent: 0x797c3eb367c0: ver 2 0 (tinfo 0x797c35b6dce0)
2018-12-01 15:27:17.747 11185-11190/livio.sandbox I/art: Do partial code cache collection, code=29KB, data=28KB
2018-12-01 15:27:17.747 11185-11190/livio.sandbox I/art: After code cache collection, code=29KB, data=28KB
2018-12-01 15:27:17.747 11185-11190/livio.sandbox I/art: Increasing code cache capacity to 128KB
2018-12-01 15:27:17.805 6692-6771/com.android.systemui D/EGL_emulation: eglMakeCurrent: 0x797c2594e340: ver 2 0 (tinfo 0x797c2592a300)
2018-12-01 15:27:17.815 6692-6771/com.android.systemui D/EGL_emulation: eglMakeCurrent: 0x797c2594e340: ver 2 0 (tinfo 0x797c2592a300)
2018-12-01 15:27:17.912 11185-11185/livio.sandbox D/AndroidRuntime: Shutting down VM
    
    
    --------- beginning of crash
2018-12-01 15:27:17.912 11185-11185/livio.sandbox E/AndroidRuntime: FATAL EXCEPTION: main
    Process: livio.sandbox, PID: 11185
    java.lang.NullPointerException: Attempt to invoke interface method 'androidx.preference.Preference androidx.preference.DialogPreference$TargetFragment.findPreference(java.lang.CharSequence)' on a null object reference
        at androidx.preference.PreferenceDialogFragmentCompat.getPreference(PreferenceDialogFragmentCompat.java:177)
        at androidx.preference.ListPreferenceDialogFragmentCompat.getListPreference(ListPreferenceDialogFragmentCompat.java:76)
        at androidx.preference.ListPreferenceDialogFragmentCompat.onDialogClosed(ListPreferenceDialogFragmentCompat.java:104)
        at androidx.preference.PreferenceDialogFragmentCompat.onDismiss(PreferenceDialogFragmentCompat.java:267)
        at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1343)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:154)
        at android.app.ActivityThread.main(ActivityThread.java:6119)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
2018-12-01 15:27:17.914 1672-2180/system_process W/ActivityManager:   Force finishing activity livio.sandbox/.MainActivity
2018-12-01 15:27:17.934 1672-1695/system_process I/WindowManager: Screen frozen for +304ms due to Window{47bc56 u0 livio.sandbox/livio.sandbox.MainActivity}