1
我的应用程序有一个活动,其中包含带查看寻呼机的片段。 查看分页器实例化片段,其中我从互联网加载数据并显示它。 我有大约60个片段总是在查看传呼机(其日期:今天+ 30天前,30天后)。避免viewpager中的片段娱乐
问题是,当我改变方向数据时,再次开始下载。如何保存这个片段的状态?
这里查看传呼机适配器:
public class TimesheetPagerAdapter extends FragmentStatePagerAdapter {
private DateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
private DateFormat dateTitleFormatted = new SimpleDateFormat("MMM dd - EEEE", Locale.US);
private ArrayList<Date> mDates;
public TimesheetPagerAdapter(FragmentManager fm, ArrayList<Date> mDates) {
super(fm);
this.mDates = mDates;
}
@Override
public Fragment getItem(int i) {
return TimesheetPage.newInstance(dateFormat.format(mDates.get(i)));
}
@Override
public int getCount() {
return mDates.size();
}
}
而且ViewPager片段:
public static TimesheetPage newInstance(String page) {
TimesheetPage TimesheetPage = new TimesheetPage();
Bundle arguments = new Bundle();
arguments.putString("date", page);
TimesheetPage.setArguments(arguments);
return TimesheetPage;
}
@Override
public void onCreate(Bundle savedInstanceState) {
setRetainInstance(true);
super.onCreate(savedInstanceState);
dateString = getArguments().getString("date");
Random rnd = new Random();
backColor = Color.argb(50, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.item_pager_timesheet, null);
LinearLayout layout = (LinearLayout) view.findViewById(R.id.llPageLayout);
tvPage = (TextView) view.findViewById(R.id.tvAmountHours);
mLoadingLayout = LoadingLayout.wrap(layout, android.R.attr.progressBarStyle);
lvTimesheet = (ListView) view.findViewById(R.id.lvTimesheet);
tvPage.setBackgroundColor(backColor);
long id = getController().getUserAccount().getCompany().getCompanyId();
mLoadingLayout.showLoading();
Log.i("onCreateView", "TimesheetPage" + dateString);
getController().getNetworkApi().getCompanyTimeSheet(id, dateString, timesheetCallback);
return view;
}
如何将网络调用保存到缓存?谢谢你的答案! – onCreate 2014-10-09 20:02:48
缓存意味着您将本地网络请求的结果保存在本地(因为您不需要在每个页面上显示请求)。您可以使用类似离子的库,使用磁盘+内存缓存:https://github.com/koush/ion – Murphy 2014-10-11 10:21:42