Develop Reference

What are all the different names for apps, projects, modules etc in Android Studio

Changing names in Android Studio is a nightmare, particularly as it seems to use a number of different names. I think I worked out how to change most of them, but what is this (see yellow highlighting on screenshot attached) and how do I change it?

for your problem with names, if you want to change a name of a file/variable in all of the places that it was mentioned in you should use the refractor.
right click on whatever you're changing its name.
refractor.
rename/rename file.
it will ask you for the new name and whether you want to change it everywhere (even in comments if you want) or not.
choose what you see fit and click refractor, he will then check where it exists and ask for confirmation on all the place he found what you're changing name and if you're 100% sure to change its name there.
warning : sometimes refractor operations are non reversible so you should double check before clicking do refractor.
as for the name up there its called project name and you can change it as instructed here

Android studio remove middle part from package name

I want to remove the middle part from the package name.
Ex: com.example.app to com.app
I have tried few things but not able to remove the middle part of the package name without errors.

I think that the only you can achieve that is this:
Press Ctrl+Shift+R, set Text to find to com.example.app, Replace with to com.app and hit Find, All Files.
After that open the directory com in file manager, move app up in hierarchy, so it becomes com/app and remove example directory.

There is a much better way to do this. com.example.app >> com.app
In Android Studio,
1) Open your project pane (tab on left top) select Android option.
2) In the same pane click on the gear icon and uncheck "Compact Entity Middle Packages".
3) Expand your package hierarchy in Project pane.
4) Now drag the package app (the one you want to move) on the package com (where you want to move).
5) You will see a red boundary around the com package now drop package app.
6) A popup should appear select "Move package", next enter com package path, next select do refactor.
Done!!
Please note, different Studio versions have different options but drag and drop method remains the same

Android Studio indirectly (but easily) supports this requirement;
e.g. Change java.X.Y.myPrecious to java.myPrecious [assume packages X and Y are empty]
(a) Select Android from dropdown heading in Project window.
(b) Using the 'gear/cog' tool uncheck Compact Empty Middle packages
(c) Drag myPrecious to java (be patient if necessary)
(d) Right-click/Delete X
(e) Clean and Rebuild the project making any obvious changes to the Manifest if necessary.

click on Setting,in setting click compack Empty middle package
then click on your package :-> Refactor->Rename ->ok

-if you package is not devided into more then 3 sub directories best way is to just rename them. Refector -> Rename -> done.
-But when you what to remove the empty one you shoud set structure to
android-> compact middle package -> now move you files to the desired folder
-> remove the empty ones now -> Done

Click with right button in your packet and find REFACTOR.Inside It you have the option Rename and after clicking a window will appear to confirm you with warnings.
Try it!

Basically, You need to move the entire below files to precedent package.
Suppose..
Package: com.app.example.food
if you want to delete example from package.
Move com.app.example."food" directory to com."app" directory directly
Done.

Remove a string in all the languages Android

I have an app with several translations, and I want to delete some strings.
How can I refactor and delete them only once for example in the default strings.xml file and automatically propagate the deletion to the other strings.xml file of other translations?

You can remove all translations by "Translations Editor" in Android Studio.
Select string's key
Click on "Remove key" button
Uncheck all checkboxes in "Delete" dialog
Click "OK" button in "Delete" dialog

CTRL-H
select tab File Search
check regular expression
input \R\s*<string name="string_name">(.|\R)*?</string> and
don't forget replace string_name to actual string name.
file name patterns set *.xml
Press Replace...
Leave replace field empty.
Press Preview >
Check all replacement.
Apply changes by press `Ok'

default strings.xml file and automatically propagate the deletion to the other strings.xml file of other translations
ADT does not support this operation. You need to get rid of the text from all your XML files yourself, which should not be hard task anyway, as it would be sufficient to do project global search (in Eclipse CTRL-H), set file mask to *.xml and search for your string key. Then just remove this file from each file found.

Now you can do it easily with Translations Editor.
To open it click on the Open editor on the top right corner in xml file.
Then in the editor right click on key you are want to delete and press Delete Keys(s)

This is the way that I have done to Delete a language I do not want.
1: Make a backup copy of your project.zip
2:Go to Your project folder >app>src>main>res:
In this folder, you will find all languages ​​in the form of folders
Remove the language folder that you not want For example : values-ar-rSA
back to android studio clean your project and test

Mac Eclipse hierarchical view also in com.example.test (package)

I have a question about the hierarchical view of eclipse. With some projects my com.example.test packages suddenly split where normally it would be on one line instead of three. It looks like this:
Does anybody know why this happens?
How can I get the com.example.test on one line again?
Edit:
I want the package presentation to be hierarchical, I only want the com.example.test back on one line.

I finally found the answer. It isn't folding because on mac there are hidden files (.DS_Store) and eclipse doesn't ignore these files, so the folders are not empty.
To fix this you have to exclude the DS_Store out of your project:
Right click, Properties
Expand Resource and click onto Resource Filters
Click "Add"
Use these settings Filter type: Exclude all.
Applies to: Files
Click "All children (recursive)"
File and folder attributes: Name matches .DS_Store
If you have done this, your project will have normal hierarchal view with com.example.test.
Found the solution at: http://twigstechtips.blogspot.nl/2012/10/eclipse-ignore-certain-files-in-project.html
Tip: Use Android Studio, it works so much better!

In the Package Explorer "View Menu" (the down arrow), select "Package Presentation" > "Flat".

Android Studio seeing which files a change was applied to

I was doing a code inspection with Android Studio and I accepted a change across multiple file which I now wish to undo.
When I go to VCS|Local History | Show History for one of the files, I can see the change was applied to 25 files, but I do not know how to show which files these are. I have version 0.3.5

Right click on your project in project structure on the left. then Local History -> Show History. If you want to show history only for src folder, click on it.. the same for layout folder etc..

You can use Shelve changes.
This is a great tool to view your changes.
Here is how to open the 'Shelve changes' dialog in Android Studio :
And here is what the dialog looks like :
You can also use this box to commit your changes if you want.