How to prevent off-screen pages of ViewPager from loading content when Activity is started?

Question

I have 3 tabs in MainActivity, which loads the content in ViewPager. But when the activity starts it loads the contents of second tab also which is off-screen. My tabs are like received message and sent message, and when there are no messages in any, I am showing a Toast that "There are no messages". SO now when the activity starts the default tab "Received" has the messages but still a Toast is shown because there are no "Sent" messages in the second tab.

I want the content of second tab to be loaded only when user selects it.

one way is using a custom adapter instead of the `PagerAdapter` — , Oct 07 '17 at 12:32

score 1 · Answer 1 · answered Oct 07 '17 at 12:22

1

But when the activity starts it loads the contents of second tab also which is off-screen

ViewPager immediately loads additional pages, with an eye towards being able to animate between pages. You cannot prevent ViewPager from loading additional pages.

when there are no messages in any, I am showing a Toast that "There are no messages"

Get rid of the Toast and have some inline UI in the tabs ("empty view") that indicates that there are no messages in that tab.

answered Oct 07 '17 at 12:22

CommonsWare

986,068
189
2,389
2,491

you are right! but there has to be some tweaks/hacks around – vikas devde Oct 07 '17 at 12:36
@vikasdevde: IMHO, you should get rid of the `Toast` regardless. `Toast` is fine for book examples... and not much more. You will not see very many professional apps use a `Toast`. – CommonsWare Oct 07 '17 at 12:44
Yeah, I guess Im gonna go with your suggestion. Thanks – vikas devde Oct 07 '17 at 13:10

How to prevent off-screen pages of ViewPager from loading content when Activity is started?

1 Answers1