public class SectionsPagerAdapter extends FragmentPagerAdapter {
ArrayList<DashboardList> arrayList;
SectionsPagerAdapter(FragmentManager fm, ArrayList<DashboardList> arrayList) {
super(fm);
this.arrayList = arrayList;
}
public Fragment getActiveFragment(FragmentManager fm, ViewPager container, int position) {
String name = makeFragmentName(container.getId(), position);
return fm.findFragmentByTag(name);
}
private String makeFragmentName(int viewId, int index) {
return "android:switcher:" + viewId + ":" + index;
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
String DashboardID = arrayList.get(position).dashboardlistid;
switch (DashboardID) {
default:
return DashboardDataV_2.newInstance(arrayList.get(position).dashboardlistid);
}
}
@Override
public int getCount() {
return arrayList.size() > 0 ? arrayList.size() : 0;
}
@Override
public CharSequence getPageTitle(int position) {
return arrayList.get(position).dashboardname;
}
}
当我在viewpager中更改页面时,将创建单个片段并替换所有数据。每次用户滑动时如何创建片段的新实例?