android configChanges

在xml文件中配置了android:configChanges="keyboardHidden|orientation"属性，在横竖屏切换的时候不会重新执行Activity的onCreate方法，只是执行onConfigurationChanged方法。

@Override
public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
 }

 保存数据

HashMap data = (HashMap)getLastNonConfigurationInstance();

@Override
public Object onRetainNonConfigurationInstance() {
    // TODO Auto-generated method stub
    HashMap obj = new HashMap();
    obj.put("PAGE_INDEX", PAGE_INDEX +"");
    obj.put("selectedEvent", selectedEvent);
    obj.put("eventsHashMap", eventsHashMap);
    obj.put("calendarSelected", calendarView.getDate());
    obj.put("eventsForCell", eventsForCell);
    obj.put("cellYouPressed", cellYouPressed);
    return obj;
}