我有一个带有 2 个选项卡的 FragmentActivity。每个选项卡调用一个片段-日历和转换器:
public class Calendar extends SherlockFragmentActivity {
//create tabs
}
private class MyTabListener implements ActionBar.TabListener
{
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
if(tab.getPosition()==0)
{
CalendarFragment frag = new CalendarFragment();
ft.replace(android.R.id.content, frag);
}
else
{
ConverterFragment frag = new ConverterFragment();
ft.replace(android.R.id.content, frag);
}
}
..
}
在Calendar 片段中,我想为 Month 视图实现 ViewPager,以便用户可以在更改月份时滑动 next/prev。
这是我到目前为止的代码。但这所做的只是显示当前月历。
public class CalendarFragment extends Fragment implements OnClickListener {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.simple_calendar_view, container, false);
//set calendar adapter
//Code from http://w2davids.wordpress.com/android-simple-calendar/
context = this.getActivity().getApplicationContext();
CalendarPagerAdapter adapter = new CalendarPagerAdapter();
myPager = (ViewPager) v.findViewById(R.id.pager);
myPager.setAdapter(adapter);
myPager.setCurrentItem(1);
}
public class CalendarPagerAdapter extends PagerAdapter {
public int getCount() {
return NUM_AWESOME_VIEWS;
}
public Object instantiateItem(View collection, int position) {
Log.d("Object", "Instantiated");
LayoutInflater inflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.simple_calendar_view, null);
_calendar = Calendar.getInstance(Locale.getDefault());
month = _calendar.get(Calendar.MONTH) + 1;
year = _calendar.get(Calendar.YEAR);
calendarView = (GridView) v.findViewById(R.id.calendar);
calendarWeek = (GridView) v.findViewById(R.id.calendarweek);
calendarWeek.setAdapter(new CalendarWeekAdapter(context));
// Initialised
adapter = new GridCellAdapter(context, R.id.calendar_day_gridcell, month, year);
adapter.notifyDataSetChanged();
calendarView.setAdapter(adapter);
((ViewPager) collection).addView(v, 0);
return v;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}
@Override
public void finishUpdate(View arg0) {
// TODO Auto-generated method stub
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == ((View) arg1);
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
// TODO Auto-generated method stub
}
@Override
public Parcelable saveState() {
// TODO Auto-generated method stub
return null;
}
@Override
public void startUpdate(View arg0) {
// TODO Auto-generated method stub
}
}
}
我被困在这里,因为我不知道当用户向左滑动时如何显示上个月日历,当用户向右滑动时如何显示下个月日历。
我尝试将此代码添加到Object instantiateItem
:
switch(position){
case 0:
Log.d("ViewPager", "Prev");
if (month <= 1)
{
month = 12;
year--;
}
else
{
month--;
}
if (hmonth <= 1)
{
hmonth = 12;
hyear--;
}
else
{
hmonth--;
}
setGridCellAdapterToDate(month, year);
break;
case 2:
Log.d("ViewPager", "Next");
if (month > 11)
{
month = 1;
year++;
}
else
{
month++;
}
if (hmonth > 11)
{
hmonth = 1;
hyear++;
}
else
{
hmonth++;
}
setGridCellAdapterToDate(month, year);
break;
}
但是没有刷卡发生。我哪里错了?