Develop Reference

What to do with "library-debug.aar" & "library-release.aar"?

I exported the project from Eclipse. Then built the project. There were 4 folders.
Then from the documentation and Google, I realized that I need to do something with the aar files. But how to build an APK I do not understand!
Please explain what I need to do to build APK!

You can import your library-release.aar as a module :
Go into File->New->New module : choose import new .AAR package
Then point to your library-release.aar.
After that go into :
File -> Project Structure -> app -> Dependencies -> press the bottom "+" -> choose module dependency and choose your library
You should have a compile project('library-release') added to your main build.gradle.

You need to add them into your project in order to successfully build .apk file of project.
See third answer on this link: How to manually include external aar package using new Gradle Android Build System

Android studio how to build a project from github source

How do I build a android studio project from github repository that only contains the source codes, no gradle build information. For example. I want to build a project from this repository https://github.com/googledrive/android-quickstart, but the android project could not be built correctly. Can I just add the build.gradle and expect the project to work?

This is a project in eclipse. Just download the zip file, and extract it. Then in android studio, import the existing Eclipse project by hitting File -> Import Project. Android Studio will just build you a AS project, including all the gradle files.

You can just create a new project with same package name as in the github project.
This will create a compilable android project/library. after that manually copy the code by downloading from github (download as zip) and then just copy the source folder.

There are three ways to do this that I know of officially.
1) Add project directly
Step 1:
Add project into following directory {App Root Folder}/Libraries/ (create libraries folder if doesn't exist)
Step 2:
Go to File/Project Structure/ under Dependencies tab click green add icon and select Module dependency and select the project you added to libraries.
2) Add project as a .jar/.aar
Step 1:
Either look for a the version of .jar/.aar you are looking for on web or compile project to .jar/.aar.
Step 2:
Follow Step one for previous way but instead select Library dependency
3) Add project from Maven
Step 1:
Find library on gradleplease.appspot.com
Step 2:
Add compile 'package name' under dependencies in your apps build.gradle

How do i import this project?

Hi I have found this github project:
https://github.com/ManuelPeinado/FadingActionBar
I have tried to import "samples-stock" and "library" into eclipse. Then I assign "library" as a library and add it in "samples-stock".
How would you make it work? I dont understand the authors instructions:
The library is pushed to Maven Central as a AAR, so you just need to add the following dependency to your build.gradle.
Thanks

Does your project, in which you want to use this lib, uses Gradle as build system?
If so, add dependency to build.gradle, as author suggests:
dependencies {
compile 'com.github.manuelpeinado.fadingactionbar:fadingactionbar:3.1.2'
}
Else, I believe Android Studio is Intellij IDEA Community Edition, just with android plugin, thus you should be able to add dependency from "Maven" in Libraries. Just copy & paste the
"com.github.manuelpeinado.fadingactionbar:fadingactionbar:3.1.2"
line to the window which opens.

In eclipse:
File->Import->Existing android code into workspace and import library from disk drive.
If you want to run samples that are present in that library you can run them as "Android Application", like any other project.
If you want to use it in your project:
Right click on your project -> Properties -> Android -> Add(select that library) and you are good to go.

How to import external library in android studio?

I struggle to import library 'PageSlidingTapStrip'(https://github.com/astuetz/PagerSlidingTabStrip).
I found this question(How to import eclipse library project from github to android studio project?), and I follow this solution.
cf)I'm using win 8.1 , android studio version 0.3.6
First, build new project like this condition.
Second, go to File -> New Module click, create new module as android library and make condition like this.( Unchecked create custom launcher icon, activity )
And this part I got a first question. Which version should I choice version about 'Minimum required SDK' , 'Target SDK', 'Compile with'? Just Follow project version? (image show default value when I create this window first.)
Anyway, I progress under condition ' Minimum required SDK : API 9 / Target SDK : API 19 / Compile with : API 19 '
Third, delete files under 'Project/PageSlidingTabStrip/src/main/' and copy folder&file under external library 'res', 'src', 'AndroidManifest.xml' and move into 'Project/PageSlidingTabStrip/src/main/' then renamed src to java.
And then project & folder become like this. (what I followed question as , told me copy and move file 'ic_launcer-web.png' apart from 'res', 'src', 'manifest' , but I can't find that file)
Fourth, go to 'File -> Project setting -> Module -> click project module -> '+' button -> select Module dependency' then apply.
After that, I face this error and cannot resolve R.
And I can't go next step, can't finish import library.
What should I do?
Is there any other solution?
Thanks for seeing long question. I hope to get a solution!

I also use the PagerSlidingTabStrip Project in my app and everything works fine.
I'm not sure if it's already possible to add a library project via the IDE (-> without any problems).
Please try to add the library project by editing the gradle files like this:
first delete your module PagerSlidingTabStrip
then create a folder in your root project directory (-> NewOne) named 'libs'
copy the complete folder 'library' of the PagerSlidingTabStrip project on git into 'libs'
rename the folder 'library' that you just copied to e.g. "PagerSlidingTabStripLibrary" (just to avoid confusion) -> after the renaming you should have the path: "NewOne/libs/PagerSlidingTabStripLibrary"
now add this library in your settings.gradle with the following command:
include ':libs:PagerSlidingTabStripLibrary'
go to your build.gradle file of your AppProject aps and add the following line to your 'dependencies':
compile project(':libs:PagerSlidingTabStripLibrary')
at least you have to sync your gradle files: Tools -> Android -> Sync Project with Gradle Files
Please try this. If you get errors please post the log file.

For update up to Android Studio 1.2.1.1
There are basically three types of dependencies which we have to add in project of android Studio
Add Normal Dependencies like Support files
Right click on project->open module settings
Select dependencies->Now press right "+" icon button ->Select
library Dependencies
Enter Name and Search
Select file and press ok button.
Add Git Hub Dependencies
Find the dependencies of git repository for example compile 'com.jakewharton:butterknife:6.1.0' from https://github.com/JakeWharton/butterknife
A. open build.gradle(module:app) file
B. Add lines compile 'com.jakewharton:butterknife:6.1.0'
OR
Follow as describe above in Normal Dependencies Step by just enter dependencies in search bar
Add Jar files Dependencies
Right click on project->open module settings
press left "+" icon (insert new Module) button -> Select import Jar or .AAR package->browse Jar file and finish
Now select dependencies-> press right "+" icon button ->Select module Dependencies->select jar files->press ok button.

For what it's worth I had this problem and eventually solved it by consistently using the same sdk version & build tools across projects.

importing jar libraries into android-studio

android-studio 0.2.7
Fedora 18
Hello,
I am trying to add the jtwitter jar to my project.
First I tried doing the following:
1) Drag the jtwitter.jar into the root directory of my project explorer, see picture
2) File | project structure
3) Modules | yamba-yamba | dependencies
4) Click the plus sign | jars or directories | and navigate to jtwitter jar | click ok
When I import the jar file I get the following error:
import winterwell.jtwitter.Twitter;
Cannot resolve symbol winterwell
Gradle: error: package winterwell.jtwitter does not exist
I researched and found that android-studio has some issues and that you have to edit the build.gradle file yourself.
So I tried adding this to my build.gradle file:
dependencies {
compile files('libs/jtwitter.jar')
And got an error message: cannot resolve symbol dependencies
Another question, where would the libs folder be. Does it mean the External Libraries?

Try this...
Create libs folder under the application folder.
Add .jar files to libs folder.
Then add .jar files to app's build.gradle dependency.
Finally Sync project with Gradle files.
1.Create libs folder:
2.Add .jar to libs folder:
3.Edit app's build.gradle dependency:
Open app/build.gradle
4.Sync project with Gradle files:
Finally add .jar files to your application.
UPDATE:
Here I'm going to import org.eclipse.paho.client.mqttv3.jar file to our app module.
Copy your jar file and paste it in directory called libs.
Press Ctrl + Alt + Shift + s or just click project structure icon on the toolbar.
Then select your module to import .jar file, then select dependencies tab.
Click plus icon then select File dependency
Select .jar file path, click OK to build gradle.
Finally we're imported .jar file to our module.

Updated answer for Android Studio 2
The easy and correct way to import a jar/aar into your project is to import it as a module.
New -> Module
Select Import .JAR/.AAR Package
Select the .JAR/.AAR file and put a module name
Add the module as a dependency

Running Android Studio 0.4.0
Solved the problem of importing jar by
Project Structure > Modules > Dependencies > Add Files
Browse to the location of jar file and select it
For those like manual editing
Open app/build.gradle
dependencies {
compile files('src/main/libs/xxx.jar')
}

In the project right click
-> new -> module
-> import jar/AAR package
-> import select the jar file to import
-> click ok -> done
You can follow the screenshots below:
1:
2:
3:
You will see this:

Android Studio 1.0.1 doesn't make it any clearer, but it does make it somehow easier. Here's what worked for me:
1) Using explorer, create an 'external_libs' folder (any other name is fine) inside the Project/app/src folder, where 'Project' is the name of your project
2) Copy your jar file into this 'external_libs' folder
3) In Android Studio, go to File -> Project Structure -> Dependencies -> Add -> File Dependency and navigate to your jar file, which should be under 'src/external_libs'
3) Select your jar file and click 'Ok'
Now, check your build.gradle (Module.app) script, where you'll see the jar already added under 'dependencies'

This is how you add jar files from external folders
Click on File and there you click on New and New Module
New Window appears ,,There you have to choose the Import .JAR/.AAR package .
Click on the path option at the top right corner of the window ...And give the whole path of the JAR file .
4)click on finish.
Now you have added the Jar file and You need to add it in the dependency for your application project
1)Right click on app folder and there you have to choose Open Module Settings or F4
2)Click on dependency at the top right corner of the current window .
3)Click on '+' symbol and choose 'Module Dependency' and It will show you the existed JAR files which you have included in your project ...
Choose the one you want and click 'OK/Finish'

Android Studio 1.0 makes it easier to add a .jar file library to a project.
Go to File>Project Structure and then Click on Dependencies. Over there you can add .jar files from your computer to the project. You can also search for libraries from maven.

This is the way I just did on Android Studio version 1.0.2
I have created a folder libs in [your project dir]\app\src
I have copied the jtwitter.jar (or the yambaclientlib.jar) into the [your project dir]\app\src\libs directory
The following the menu path: File -> Project Structure -> Dependencies -> Add -> File Dependency, Android Studio opens a dialog box where you can drag&drop the jar library. Then I clicked the OK button.
At this point Gradle will rebuild the project importing the library and resolving the dependencies.

I see so many complicated answer.
All this confused me while I was adding my Aquery jar file in the new version of Android Studio.
This is what I did :
Copy pasted the jar file in the libs folder which is visible under Project view.
And in the build.gradle file just added this line : compile files('libs/android-query.jar')
PS : Once downloading the jar file please change its name. I changed the name to android-query.jar

There are three standard approaches for importing a JAR file into Android studio. The first one is traditional way, the second one is standard way, and the last one is remote library. I explained these approaches step by step with screenshots in this link:
https://stackoverflow.com/a/35369267/5475941.
I hope it helps.

If the code for your jar library is on GitHub then importing into Android Studio is easy with JitPack.
Your will just need to add the repository to build.gradle:
allprojects{
repositories {
jcenter()
maven { url "https://jitpack.io" }
}
}
and then the library's GitHub repository as a dependency:
dependencies {
// ...
compile 'com.github.YourUsername:LibraryRepo:ReleaseTag'
}
JitPack acts as a maven repository and can be used like Maven Central. The nice thing is that you don't have to upload the jar manually. Behind the scenes JitPack will check out the code from GitHub and compile it. Therefore it works only if the repo has a build file in it (build.gradle).
There is also a guide on how to prepare an Android project.

Avoid redundancy. If you have your jars under /libs in your app build.gradle by default you will have
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
...
}
that is enough to add all the jars you have under /libs
this is not necessary
// compile files('libs/activation.jar')
// compile files('libs/additional.jar')
// compile files('libs/mail.jar')

I also faced same obstacle but not able to find out solution from given answers. Might be it's happening due to project path which is having special characters & space etc... So please try to add this line in your build.gradle.
compile files('../app/libs/jtwitter.jar')// pass your .jar file name
".." (Double dot) will find your root directory of your project.