Develop Reference

Unable to view the Available Qualifiers when creating a new XML file in Android Studio

Hello I am new to Android Studio and Learning XML and JAVA through Big Nerd Ranch. For the most part things have been going smoothly, however I have encountered a new issue that I have not seen before. In a project I have been working on for a while I am suddenly unable to add qualifiers (in other programs on my computer I can still add them).
When I right click on my:
res directory -> new -> values resource file
I get a window that pops up only asking for me to enter the name of the file. This is an issue because the list of available qualifiers does not appear in this window, like normal, I do not know how to add a qualifier.
How does one add a qualifier when none show up in the file creation window?
Thanks in advance for any help!

When you add a qualifier for an layout file for example. A new folder is created in the directory, with the name layout-qualifier. Take a look at this Android Qualifiers

I want to use qulifier <large> in android studio,but I can't add the directory layout-large

I am a fresher in android.In my tutorial book(
A little outdated) teaching in Eclipse,It just add a directory layout-large to code another layout xml files to adapt big screen.
I use android studio,when I add the directory,it says:
and add the layout-largedirectory:
I am wondering if there is a different way to use qulifier to adapt big screen in adroid studio?

You can try adding the folder in the /res directory using your file explorer.
Or you can try switching to Project view in stead of Android to do this inside Android Studio as visible in this screenshot:
When in project view all different resource folders are visible in your IDE, while in Android view, these get visualized in what appears to be a single folder.
Once you see this, you can right-click on the res folder and select new>Android Resource Directory
There you can add different types of resource paramater to new folders.
These resource parameters can be for Locale, density or as in your case screen size.

Switch your Project view with option "Project" not for "Android" you will see the folder.

How does one get dimens.xml (sw600dp) into Android Studio?

I inherited the values folder structure shown below.
For over an hour I've Googled and looked and pulled down menus in Android Studio 1.2.2 and tried creating files and folders but nothing I have done lets me add, for instance, dimens.xml (sw720dp).
I deleted dimens.xml (sw720dp - landscape) because landscape didn't suit my needs.
What steps did whoever created the folder structure take in order to get dimens.xml (sw600dp) to appear in the structure?
What steps do I need to take to get a dimens.xml file with the sw<N>dp file naming convention? How do I get dimens.xml (sw720dp) where it belongs?
You can ignore the rest of this. I'm just showing that I've TRIED stuff, none of which works right.
Am I supposed to right-click values or dimens.xml (2)? What then?
Here's what I did and it didn't do as I need:
I also tried:
EDIT
I also tried copying the sw600dp file. No luck:
IT CAN'T BE THIS HARD.

What steps do I need to take to get a dimens.xml file with the swdp file naming convention?
First, you will probably be happier with life if you change the drop-down above your project tree from "Android" to "Project", which shows you an actual filesystem view of your project.
To add a resource directory from within Android Studio:
Right-click over res/
Choose New > "Android resource directory" from the context menu to bring up the New Resource Directory dialog:
Choose your resource type in the "Resource type" drop-down (in this case, values)
Click on your desired qualifier (in this case, "Smallest screen width") in the "Available qualifiers" list.
Click the >> button
In the field that appears, fill in your numeric value (in this case, 600)
Click OK to close the dialog and create the directory
To add dimens.xml to that directory, right-click over the newly-created directory and choose New > "Values resource file" from the context menu.

I have had MANY failures trying to do stuff OUTSIDE Android Studio, but this time I got away with it:
I will now see how #Commonsware says I could have done it.
EDIT
And as always, #Commonsware bailed me out with good advice (I have no idea when or why or how I lost the File structure "tab" along the left margin).
Here's what I now see, and (I was right:) it's NOT hard to see what to do ONCE YOU SEE THIS:
And, following his advice, I get to here and am ready to create the dimens.xml file that goes inside:

Android Studio - layout-land folder not appearing

I want to support separate UIs for both portrait and landscape mode in my android studio project, for which I need to have a folder with name - 'layout-land', to create it I followed below steps:
Right Click on res folder and create a new directory
Give name - 'layout-land'
Problem is- the created folder is not appearing within res folder :(
I am clueless, please suggest.

That's the slightly confusing 'android' view of Android Studio. It shows only one layout folder (also shows only one drawable folder) which really contains all folders. Switch the view to 'project' and you'll see all folders.

I'm posting this just in case anyone really likes Android hirearchy of the project (note: other answers using classic hirearchy are correct as well).
All layout dirs with different qualifiers are categorized under name "layout". Just right click on the "layout" create your xml with any qualifier you need and you'll get this hirearchy (image below).
Notice activity_main.xml is not a directorty but a category collecting all activity_main.xml files with different qualifiers.
This categorizing pattern appears quite often in Android hirearchy.

Android Studio: Newly Created Directory Not Appearing In Folders View

I am trying to create a new folder inside the /res directory
I added a new directory
The folder does not appear in the /res folder even though it exists in the finder
Case and point I tried adding the folder again and I got a message telling me it exists.
If you can suggest what I can do to fix this I'd love it!
(And yes I have restarted the program as well as my computer)

Turns out there is a selector at the top which, by default, is set to show Android. If you flick the toggle down to 'Packages' you can see your own packages.

In Android Studio you can add new directories by right clicking the resource folder in the Android view. (Don't get confused by the New Directory option.)
For example, if you want a new layout resource file and folder then right click layout and choose New > Layout resource file.
If you want a new layout-sw600dp for the activity_main.xml file then choose Smallest Screen Width from the list and click the >> button. Fill in the file name and width and click ok.
Android Studio will automatically create the layout-sw600dp directory and in the Android view you will have both layout files conveniently displayed next to each other.
It is a similar process for adding other resource directories and files (see my other example).

Clicking at TAB Android in top, select the perspective Project Files. Then u can see all folders of project.

Android 4.0
The Android view by default seems to conceal the duplicated resource type directories in the side panel.
If you want to view the duplicate resource type directories i.e. drawable for two different languages,
switch the view from "Android" to "Packages" or "Project" or "Project Files"

Browse the actual folder structure in windows and you'll see the folder. Put the same resource file found in the normal drawable folder into this new directory. Then when you go back into Android Studio you'll now see 2 files under the NORMAL \res\drawable structure. Make sure you don't look for a subfolder in Android Studio called "drawable-sw600dp" because you won't find it other than in windows explorer. What you will find in Android Studio (after you copy the resource file) is a new resource file along with your original called "jenny-web.png (sw600dp)" or something similar. This same principle resolves the same error when working with other resources like layouts.

For Android Studio 3.0, those who are following https://developer.android.com/training/basics/supporting-devices/languages.html and have encountered the same issue as the one stated in this question, you can also do the following aside from the above answers which are helpful.
Right click to the target folder (i.e. res folder) > New
Choose Android Resource File
Specify the file name, and in the Directory name field put the folder name you want to create or the existing folder you want to put the resource file.
After hitting OK, in the Project files dropdown, you will see the correct strucutre.
And in the Android dropdown, you will see it as part of the strings.xml under values folder.

This worked best for me. What I did was I right-clicked the 'app' directory and chose 'New' >> 'Android Resource File'. After that I filled in the File Name with 'strings'. Chose 'XML' as my resource type and my Directory Name was 'values-b+za+ZA'.
This created everything as I wanted it to, however, values-b+za+ZA, still didn't show in the Android view but it shows in the Package view. (The views you choose from the top dropdown.)
The difference this time is that in the Package view I can still see my new 'strings.xml' file and in the Android view I van also see the new 'strings.xml' file.
I guess android studio doesn't show custom directories in the Android view but creates like some kind of link to the true directory when working with it. I am not familiar with Android Studio at all but this did work for me. If there are more professional answers please feel free to correct me.

You most probably have the file named in Uppercase, Android Studio does not recognize file names in Uppercase, I had made this mistake a while back.

As the developer doc states:
be sure the Project window is open (select View > Tool Windows > Project)
and the Android view is selected from the drop-down list at the top of that window.
You will then be able to see all relevant project files (including new ones) in a more efficient way.
Hope it helps someone.

This is odd but in my case i had to many underscores delimiters.
When i renamed yt_search_view (2 delimiters) to yt_searchview (1 delimiter), it appear in project view where it should be. It is probably a bug. My version is Android Studio 3.2.
Also, i notice that if i add a value folder to the layout folder, it also fix the issue.
Example:
layout_control_x
--layout
----top_panel.xml
--values <--adding this empty folder fixed the problem
For complete information on how to add sub folder layouts check this.