Android: not list all the item at once - android

When I browse some news apps, I see that the apps first show let's say 20 rows of news first, when I slide to the few last news, it loads 20 more news.
What is that technique called?
Is there any example or tutorial on that topics if I want to build a similar apps that get data from mysql?

Here are some examples/thread that go over the same topic:
Android: Implementing Endless List like Android Market
Dynamically load more items to the listview
Android Endless List

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Theoretical inquiry about listviews and multiple activities in android studio

New developer here, for a personal project I want to develop a shop like app. I was wondering if it's possible to have one listview, and upon clicking each entry bring up another listview for each entry, and then upon clicking that it will bring up a page for each product.
Do I need separate activities for each product and listview I want to make? Or is it possible to make a few listviews and have the listview grab the string[]?
Technically, it is possible to have several ListViews and one activity. However, you should think about if the UX you want to achieve will be intuitive and familiar for your users, and preferably following Material Design guidelines. For example, take a look at the approach Google Play Store app took with with tabs, chips, and lists / grids.

Android Disclosure Indicator Solution

I developping an Android app based on its iOS twin. In one of our view, we have a list with many information but not necessarily all the information we want. In iOS, they have the right-carret disclosure indicator, but is there an equivalent in Android?
According to this page, http://developer.android.com/design/patterns/pure-android.html, Android app should not have any such thing. But how can I make it clear to the users that there is more info to be shown if they click on the list item?
Thank you!
You can use a ListView and set any icon you want for each item of the ListView.
It's a paradigm of the OS that clicking on list items takes you into a more detailed page. Just simply the fact that it's a list should make it clear to users that there is more information under there as long as the title of the list item is clear. For example the items in the link that you sent make it clear that you can click on them to get more Bluetooth or WiFi settings.

Architecture of Android app to display data from WS

I want to build an Android app to display a list of different music singers with some data on each row and a small photo of album. Should be small navigation after selecting an artist, you can go to his albums and then to his songs...
1 - what would be the best architecture design for this kind of app? I tough about implementing it in this way:
When splash screen appears I call to a web service to download the information and save it on device DB.Then I use Loaders to load all this data from DB, after load is complete I remove the splash screen and display the list. For each item click I bring the data from WS and display it. my question is do I need to involve actually DB for this? and is it good to fetch data for each item selected (singer), if I go back and then press again the same item, do I have to bring again all the data from WS?
2 - Anybody can recommend site where I can learn about architecture of apps, not the linux-android architecture but real apps.
Ok I'm not sure if it's the best approach, but give this blogpost a try. It helped me a lot, because it gives you kind of a convention how to design android applications (I'm coming from rails^^).
http://blog.joanzapata.com/robust-architecture-for-an-android-app/

Android 4.2 Contacts ListView UI for own app?

I need to build an android app which is as similar as possible to the contacts app on my S4, but with other data in the list. Have the data as an ArrayList. I've googled a lot, but there seems to be no examples with the same looking or searchfield above. Is it possible and also legal to use the original contact list source with the sections and alphabetics index, where the letter is large displayed on scrolling? I'm using Android Studio and have used the template with tabs and swipe using fragments, which also should be supported, because of the detail view of the list items. What would be the most simple way to get what I need? Lots of thanks.

Android: implementing contacts app layout

Does anyone have a tutorial or link to android source or anything that I can use to learn how android created their contacts app. I'm looking into creating a small app that will can display some data similar to how the contacts app displays its contacts. It seems to be some kind of list view with image buttons for actions.
**EDIT***
Lets make this a little easier, any one have any idea how on Android 2.1 and so far up to 2.3 the contacts tab and favorites tab can display a contact and next to it a button. I had thought this was somehow done in a listview but according to what I've read it's not possible to have a clickable listview plus button on a list item. So I'm assuming somehow a listview is being created and a button added next to the listview. I've tried looking at stock android source on github but I just dont understand it.
Here's the git hub for the Android contacts application:
https://github.com/android/platform_packages_apps_contacts

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