How to create android multitasking view? - android

I am actually trying to recreate this type of view, that can be seen when clicking on the right button of Android 6.0
But it doesn't look like a recyclerview, does someone know anything about it ?
Thanks

For such questions, I always like to point people to the Android Open Source Project. Looking around there, you can quickly stumble upon the 'Recents' implementation in the SystemUI package:
https://android.googlesource.com/platform/frameworks/base/+/master/packages/SystemUI/src/com/android/systemui/recents?autodive=0%2F/
It's quite a complicated setup, but reading through it you will learn (and see) the exact implementation of the Recents system UI component, exactly as pictured in your above image. Start with the Recents.java than proceed around the RecentsActivity.java and see the views and the implementation for it. It's all custom and if you re-use their code (feel free), please note the license for using it!
Hope it helps!

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How to exclude overlay from screenshot?

Based in this answer I think that exists a solution at least to system apps (or probably also in rooted devices?). Happens that i not understood the code example linked on answer comments. Someone could explain a step by step to achieve this please (with a code example if possible)? Thanks in advance.
Because of androids way of handling screenshots, excluding the overlay is not possible. But you could, as stated in your link, make the screenshot without your overlay.
This would result in having unrendered holes in your screenshot, whrere there would be only a black background.
If you want that, you could easyly just make your overlay black of the second you shoot the screenshot, or even disable the visibility, to get a clean screenshot. To give you a more detailed answer, we would need a more prescise question with examples and ideas how you wrote your code.
EDIT:
The problem is, that you could theoretically dig into androids source code and change the screenshot behaviour. But with that you would create a new Android version on your own. As #Hassan Uddin stated. Running that on your phone would require you to dig deep into androids source code and possibly not find any answer there.
It is not possible because it's like a security feature. If you are willing to spy on someone's screen, then you are too late it's 2021... the OS will not let you do so... you have to MOD the OS instead
You can not exclude overlay from screen capture. you can hide or make it transparent in case of your overlay. you can not handle third part overlay.

Styling Custom Dialogs

Is there any way, specifically in android studio, to see what one's custom dialog would look like without actually running the application? It seems that the Design view of layouts account only for entire-screen designs. It also seems that sometimes the way the "dialog" looks in the design view is wildly different than the way they look live.
I would share some of my code, I know you guys love that, but this isn't exactly a coding question, is it?
You can use third party tools and mirrors. I think the closest you can get is by checking this out.
This is hot swapping in general and you get interactive previews but like I said it is the closest you can get. I haven't worked thoroughly with it but I think this should be what you are looking for.

Where can I find the source for Android home screen widget layout?

Today I had my first time with Android 4.2, and I noticed how the home screen automatically repositions widgets as you drag them:
I recently worked on a similar code for our project, and I have to admit its performance is much worse. My algorithm is really stupid, and I'm looking for better alternatives. This is the closest one I've found yet, but I haven't tested it yet.
From my understanding, this is related to bin packing, but bin packing algorithms focus on putting rectangles as close to each other as possible, while Android implementation focuses on making as few changes as possible from the initial configuration, and thus is aesthetically pleasing.
Because Android is open source, I hoped to learn from their code, but I can't find anything related to laying out rectangles in android.appwidget. What is the right place to look at?
I'm not 100% sure but it looks like CellLayout.java from Launcher2 is reponsible for this.

Android Quick Actions UI Pattern

I'm interested in incorporating the Android UI pattern called "Quick Action". Basically, it's a context menu that doesn't cover up the data that is being acted on. I'd like to implement this but I cannot find some sample code or an API to help me out.
Note this UI pattern is discussed in the YouTube video, http://www.youtube.com/watch?v=M1ZBjlCRfz0#t=15m20s.
Does anyone have an implementation of this or know what Google's standard is for adding this to an application?
Till the official Twitter app is open sourced by Google, you may want to take a look at this implementation:
http://www.londatiga.net/it/how-to-create-quickaction-dialog-in-android/
Really easy to use and works great.
Interesting Question. Android uses this pattern in their Contacts-App. You can get the source using git:
git clone git://android.git.kernel.org/platform/packages/apps/Contacts.git
I did this and quickly grepped it, but I didn't get a conclusive result. I think that's done in "Contacts/src/com/android/contacts/ui/QuickContactWindow.java", but I am not completely sure.
I you google for QuickContact android, there are a lot of images that show exactly the kind of menu that you want, so it seems likely that it is indeed called QuickContact in that context.
Looking at the Documentation, I don't see any inherited classes that you could use to do this for something other than contacts.
So, a few starting points, but no solution from me ;-)
This open source project has the same look and feel for the quick actions popup as the twitter app:
http://github.com/ruqqq/WorldHeritageSite/tree/master/src/sg/ruqqq/WHSFinder
It helps to download the whole project because you need a number of drawables, images, and other resources from that project.
The main demo class is called WHSListActivity.java. The other classes you need is QuickActionWindow.java, and QuickActionItem.java.
After that, it's really easy and works great. I use it for my apps.

Android - first launch interactive tutorial

I'm writing a new app for android and I would like to implement also a first launch tutorial. In particular, the tutorial has to be interactive. Basically, after a user registers to the service, a minimum settings will be required.
I'd like something like today we have into Google Apps, like Sheets, Docs and so far. The exception there is that those tutorials have the aim to explain how the app works. Here I want to have something where user can input some data.
I was looking at ShowcaseView but seems to be deprecated and old in style.
So here the question is: what is the best way to implement that? ViewPager?
I also had a look to this other question, but it did not help too much.
Any advice is really appreciated.
EDIT: I have found this other nice alternative. AppIntro It seems what I was looking for. :)
There are few I found by quick searching Github:
https://github.com/Seishin/showcaseview-android
https://github.com/worker8/TourGuide
https://github.com/amlcurran/ShowcaseView
I'm pretty sure you can find the right one for you ;)
You can do it in several ways that really depends on you and your app. Basically you can create a "Boarding" experience with ViewPager that will go thru the main screen of your app (with static images for example) where you explain the user what goes on in your app. The other way way is an interactive tutorial as the user already landed into your app - you can achieve this with something like Showcase (I'm pretty sure that there are libs on GitHub that are still maintained).
I would recommend Roman Nuriks Wizard Pager code on Github as a starting point. It's not so much a library as a sample code showing you how to do what you want.
The general approach is to use a ViewPager with some form of navigation buttons to move the user forwards and backwards through the pager Fragments.
https://github.com/romannurik/Android-WizardPager

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