[android help] Save preferences in one Activity and use in another

The problem is that I save the settings in one Activiti

                    final CheckBox semester=(CheckBox)layout.findViewById(R.id.chbSemeseter);
                    Context context = getApplicationContext();
                    final SharedPreferences preferences =PreferenceManager.getDefaultSharedPreferences(context);
                    final SharedPreferences.Editor editor=preferences.edit();
                    final Calendar calendar=Calendar.getInstance();
                    AlertDialog.Builder builder=new AlertDialog.Builder(this);
                    builder.setView(layout);
                    builder.setTitle("Select current week and semester!");
                    builder.setPositiveButton("First Week",new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            if (semester.isChecked()){
                                int week=calendar.get(Calendar.WEEK_OF_YEAR);
                                editor.putInt(APP_PREFERENCES_SEMESTER,week);
                                editor.putInt(APP_PREFERENCES_SEMESTER,1);
                                editor.commit();
                            } else {
                                int week=calendar.get(Calendar.WEEK_OF_YEAR);
                                editor.putInt(APP_PREFERENCES_SEMESTER,week);
                                editor.putInt(APP_PREFERENCES_SEMESTER,2);
                                editor.commit();
                                }
                        }
                    });

But when I tried use them in another activity I get error

        Context context = getApplicationContext();
        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
        if (preferences.contains(ActivitySetting.APP_PREFERENCES_WEEK)){
            String t=preferences.getInt(ActivitySetting.APP_PREFERENCES_WEEK,0)+"";
            //Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.Integer
    at android.app.SharedPreferencesImpl.getInt(SharedPreferencesImpl.java:240)
    at com.example.Journal.UI.ActivityLiveDiscipline.onCreate 

            MyLog.d("Now week "+t);
        }else {MyLog.d("NOt preferences");}

How can I save preferences in one Activity and use in another?

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