Develop Reference

Updated items on recyclerView are lost when view pager is used

When i change recyclerView data of one tab,data is being reflected(working fine), but when i switch to other tabs and go back to updated tab , the updated items on recyclerView are lost .how to notify viewpager adapter that i have changed data in recyclerAdapter.

Actually, ViewPager loads the next and previous (if any) fragment on initialization and if you will go to the second tab it will load 3rd automatically. You need to use:
viewpager.setOffscreenPageLimit(3);//3 is the limit not refreshing the fragment till 2 swipes
Hope this will solve your problem.

Android viewpager recyclerview update after dialogFragment

I have an app where consisting of a viewpager with 3 tabs, with the second tab containing a recyclerview with items.
If I were to hold onto the item, a dialogfragment would popup. There's an option to delete the item from the database. However, I'm having trouble working out how I would refresh the recyclerview. I've tried creating a new fragment (2nd tab fragment), however, the data doesn't update.
The only thing I can get working is by recreating a new activity, however, that loads the first tab of the viewpager.
Thanks in advance.

How to change content of fragment in pagerview

I have a Page which has three buttons (teens, adult, old) and same page contains view pager which has 7 tabs for week days. When this page loaded it show list of all programs for all (teens, adult and old) categories in all 7 tabs according to which day is. What I want to implement is that when user select anyone one of the above button the contents of all the tabs populated by new filtered data list according to the selected button.
How I can implement this?.

You just need to set the selection in your Adapter and then call notifyDataChanged. That will reload the adapter and go back through the instantiateItem calls again. In instantiateItem you can look at the selection and change the content accordingly.

Load custom position of page when create viewpager fragment

I got a problem with viewpager fragment.
Example: i got an array: 1-2-3-4-5-6.
I want when i create viewpager fragment, it will jump to fragment position 3.
Now the way viewpager do is: load all the list seriated like (1 and 2 and 3 and..), after that this set viewpager.setCurrentItem(3,false).
But with the way like that, it take more time when user click to open viewpager, is any way to do like:
When create viewpager, it will load fragment with position 3 first, after finish build UI of fragment(3), it will load another position of fragment, so when user click to open viewpager, they will not have waiting for viewpager create.
So please give me the ideal for that case.

The fragment data of the corresponding tab of viewpager need to be loaded only when the tab is clicked

I am having a viewpager and having 3 tabs in it. All the three tabs are having their fragments. What I noticed that each fragment data is getting loaded at the first time when I am setting adapter to viewpager.
What I need is to load the fragment data of the corresponding tab only when the particular tab is getting clicked.
I have noticed one more issue in it. Like when the activity started in which I am having viewPager, then the data of the first tab's fragment get loaded at the same time the data of the second tab's fragment also get loaded and that is shown when I click on that tab.
Same way when I click on Second Tab, third Tab's Fragment date get loaded.
So what I need is that the data of the fragment should be loaded only when I click on the particular tab.
Thank you so much in advance..

You should use the ViewPager.setOffscreenPageLimit(0) to only load the currently displayed content.

Its the View-pager behaviour that it loads one page left/right to current page even if you have specified setOfflinePageLimit(0).
To load each fragment on click on tab, you should use LocalBroadcastReciever.