I'm building my Android App using Viewpagers, and I built a ListView that takes 8 seconds to show the full Items.
The page doesn't update the view automatically, thats why the Listview appears empty when it is shown for the first time.
So, I was thinking about creating a new page called loading, and hide the page with the listview, and only show it when the Listview items are already there.
To do that, I would like to know how can I hide pages.
I tried to use an Handler and change the number of pages after 8 seconds, but it didn't work, can you guys give me any idea of how can I do that?
Thanks.
You shouldn't create a new page called loading,it is not a good way to solve it. You can u get data in oncreat first time,then update data by a timeror handler+timertask and so on.
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I am building android application where I am using Custom ViewPager. The Problem is explain below in the following steps:
When I open new activity of ViewPager and click on any button and setText any particular value to it. It's working fine.
Problem occurs when I swipe left-right and then click on button to setText on particular TextView; the value gets set as I can toast the value of TextView using getText. But the value does not change in the UI. For exmaple - I swipe any page and now the TextView contains my current position as 2. If I click button and try to do setText(position++) and toast the value, the incremented value is shown in the toast
But still TextView showing 2.
This issue is coming particular in 5.1.1.
I've also been fighting this one for several hours. Best I can determine ViewPager is really designed for a single view where nothing changes after the first time it appears (which hides the bug where SetView stops working). Think of it as showing fixed pages in a book.
If you have an adapter (in my case a CursorAdapter) in the Fragment, you can get it to update using a notifyDataSetChanged() on the adapter after an update is made. This still doesn't fix the setText being ignored after the first time the page is rendered.
Another solution may be to use Action Tabs with Activities instead of Fragments, but this has been depreciated. Still looking for a better solution.
I'm building an Android magazine-reader for our campus publication that pulls articles from a web service and displays them in a ViewPager.
To minimize the initial loading time, I want it to pull a relatively small number of articles (say 10) to begin with. Once it has pulled and displayed those articles, I want it to immediately begin downloading/deserializing the next 10 articles while the user is looking through the first set. Likewise, when they reach the 11th article I want it to go ahead and download the next 10, so that the user can continually browse without ever having to wait for more articles to load. This seems easy enough to accomplish using AsyncTasks, but I've hit one small hitch: When the next set of articles is downloaded and added to the ViewPager, it jumps back to displaying the first page.
How can I add views to the end of the ViewPager's dataset without changing the article being displayed to the user?
you will want to use the Endless Adapter created commonsware.
Or you can open the page again after refreshing the content of the ViewPager. Get the article id of the article user is reading. Open the same article after the ViewPager is refreshed.
I have a listview whose data is taken from internet.
Data is a list, a long list, so I'd like to display the first, say, 10 results.
If user scrolls down I'd like a progressbar to appear at bottom, while I ask for the next 10 results to server, then remove progressbar and add the new 10 items.
I see this behaviour in the facebook app, can you point me to a tutorial to do something similar?
First, here is a tutorial for a never-ending ListView:
Android tutorial: Dynamicaly load more items to the ListView ( Never Ending List! )
I've used this in my application and it works flawlessly.
Secondly, this tutorial will teach you how to grab data from the internet and display it in your ListView: Android Custom ListView with Image and Text
Combine both of them together and you get what you need [Provided you have the basic knowledge of Android programming. Goodluck ;)]
I cant seem to find smooth solution for next what one would thought would be simple task:
I am using ActionbarSherlock for my application with 2 tab bars. On first tabbar i have simple input form and on second i would like to show inputed data in ListView.
Widgets and views are not problem here.. the only problem i have is next:
I would like for my listiview to be updated when user scroll into it.
How can I make that happen? Until now I had walk around with TextSwitcher and static variable that executed refresh of ListView.
Thank you
How do I do pagination using ListView. For an example, I have 12 records in my ListView and I want to show first 10 data in 1st page and the remain data in next page.
You can add a footer on your listview that will hold the buttons for next and back. In an stackoverflow question you have the complete solution for that.
Next step can be done in several ways. The simplest one, that I am seeing right now, is: Save the page you are at a variable. Then, each time you do next you add one to that variable. In your adapter, in the getView you multiply that variable by the position so you can get the correspondent position depending on the page the user is.
Better way to build view like pages, use Fragment,You can show desire content in pages as you mention in your question, for more details look out section 21 example,it cover fragment.