CODEWITHSUNDEEP
javaandroidjarandroid-studio
dum4ll3
dum4ll3

Reputation: 1467

How to make a .jar out from an Android Studio project

I'm using AndroidStudio and I have this project as shown:

enter image description here

What is inside the blue circle is myLib. myLib also needs to use an external lib that is inside the red circle, and an apache package (green circle).

So I want to make this whole thing become a single .jar, so I can use it in another projects.

A step-by-step guide would be really appreciated, I'm a beginner in the developer world.

Thanks!

Upvotes: 115

Views: 176140

Answers (12)

Arun Kumar
Arun Kumar

Reputation: 1

In Android Studio, open the "Run Anything" bar by pressing CTRL + CTRL(double CTRL button), then enter gradle CreateFullJarRelease and hit ENTER. Once completed, your artifact will be located in the following folder within your project:

your_module > Build > Intermediates > Full_jar > Release > CreateFullJarRelease > full.jar.

Upvotes: 0

Radesh
Radesh

Reputation: 13585

In case of this accepted answer not working for you

Use this

task createJar(type: Copy) {
    from('build/intermediates/packaged-classes/release/')
    into('libs/jars/')
    include('classes.jar')
    rename('classes.jar', 'plugin.jar')
}

Instead of this

task createJar(type: Copy) {
    from('build/intermediates/bundles/release/')
    into('libs/jars/')
    include('classes.jar')
    rename('classes.jar', 'logmanagementlib.jar')
}

Upvotes: 1

Michael Yang
Michael Yang

Reputation: 1433

I had a supplement; In the new version Android Studio(for me is: Android Studio Arctic Fox | 2020.3.1 Patch 3 Build #AI-203.7717.56.2031.7784292, built on October 1, 2021) In gradle panel, it has no task in default. Go to the Android Studio ---Settings--Experimental--Gradle tab, uncheck"Do not build Gradle task list during Gradle sync", then click File--Sync project with Gradle files, then the task appeared in the Gradle Panel.

Then follow the answer: https://stackoverflow.com/a/52681317/4065069

enter image description here

Upvotes: 2

yoAlex5
yoAlex5

Reputation: 34461

If you use

apply plugin: 'com.android.library'

You can convert .aar -> .jar

If you run a gradle task from AndroidStudio[More]

assembleRelease 
//or
bundleReleaseAar

or via terminal

./gradlew <moduleName>:assembleRelease
//or
./gradlew <moduleName>:bundleReleaseAar

then you will able to find .aar in

<project_path>/build/outputs/aar/<module_name>.aar
//if you do not see it try to remove this folder and repeat the command

.aar[About] file is a zip file with aar extension that is why you can replace .aar with .zip or run

unzip "<path_to/module_name>.aar"

Upvotes: 0

Abhinav Tyagi
Abhinav Tyagi

Reputation: 5266

  • Open build.gradle for library project enter image description here

  • Write two tasks in build.gradle -- deleteJar and createJar and add rule createJar.dependsOn(deleteJar, build) enter image description here

The code from above:

task deleteJar(type: Delete) {
    delete 'libs/jars/logmanagementlib.jar'
}           

task createJar(type: Copy) {
    from('build/intermediates/bundles/release/')
    into('libs/jars/')
    include('classes.jar')
    rename('classes.jar', 'logmanagementlib.jar')
}

createJar.dependsOn(deleteJar, build)

  • Expand gradle panel from right and open all tasks under yourlibrary->others. You will see two new tasks there -- createJar and deleteJar enter image description here

  • Double click on createJar enter image description here

  • Once the task run successfully, get your generated jar from path mentioned in createJar task i.e. libs/xxxx.jar enter image description here

  • copy the newly generated jar into your required project's lib folder-->right click-->select "add as library"

Upvotes: 152

Haroun Hajem
Haroun Hajem

Reputation: 5628

In the Android Studio IDE, access the "Run Anything bar" by:

CTRL+CTRL +gradle CreateFullJarRelease+ENTER

After that you'll find your artefact in this folder in your project
Build > Intermediates > Full_jar > Release > CreateFullJarRelease > full.jar

OR

Gradle has already a Task for that, in the gradle side-menu, under the other folder.

gradle toolbar

Then scroll down to createFullJarRelease and click it.

Gradle Tasks

After that you'll find your artefact in this folder in your project

Build > Intermediates > Full_jar > Release > CreateFullJarRelease > full.jar

Upvotes: 41

Dame Gjurchinoski
Dame Gjurchinoski

Reputation: 159

  1. Go to Gradle tab in Android Studio , then select library project .

  2. Then go to Tasks

  3. Then go to Other

  4. Double click on bundleReleaseaar

You can find your .aar files under your_module/build/outputs/aar/your-release.aar

Here image

Upvotes: 1

Md Imran Hossain Ku
Md Imran Hossain Ku

Reputation: 11

task deleteJar(type: Delete) {
    delete 'libs/mylibrary.jar'
}           

task exportjar(type: Copy) {
    from('build/intermediates/compile_library_classes/release/')
    into('libs/')
    include('classes.jar')
    rename('classes.jar', 'mylibrary.jar')
}

exportjar.dependsOn(deleteJar, build)

Upvotes: 1

Sonia John Kavery
Sonia John Kavery

Reputation: 2129

.jar file will be automatically generate when u compile/run your application.

You can find your class.jar file from root_folder/app/build/intermediates/bundles/debug

jar file location

Upvotes: 0

yaniv
yaniv

Reputation: 170

the way i found was to find the project compiler output (project structure > project). then find the complied folder of the module you wish to turn to a jar, compress it with zip and change the extension of the output from zip to jar.

Upvotes: -1

Bao Le
Bao Le

Reputation: 17507

Simply add this to your java module's build.gradle. It will include dependent libraries in archive.

mainClassName = "com.company.application.Main"

jar {
  manifest { 
    attributes "Main-Class": "$mainClassName"
  }  

  from {
    configurations.compile.collect { it.isDirectory() ? it : zipTree(it) }
  }
}

This will result in [module_name]/build/libs/[module_name].jar file.

Upvotes: 12

Scott Barta
Scott Barta

Reputation: 80030

If you set up the code as a plain Java module in Gradle, then it's really easy to have Gradle give you a jar file with the contents. That jar file will have only your code, not the other Apache libraries it depends on. I'd recommend distributing it this way; it's a little weird to bundle dependencies inside your library, and it's more normal for users of those libraries to have to include those dependencies on their own (because otherwise there are collisions of those projects are already linking copies of the library, perhaps of different versions). What's more, you avoid potential licensing problems around redistributing other people's code if you were to publish your library.

Take the code that also needs to be compiled to a jar, and move it to a separate plain Java module in Android Studio:

  1. File menu > New Module... > Java Library
  2. Set up the library, Java package name, and class names in the wizard. (If you don't want it to create a class for you, you can just delete it once the module is created)
  3. In your Android code, set up a dependency on the new module so it can use the code in your new library:
  4. File > Project Structure > Modules > (your Android Module) > Dependencies > + > Module dependency. See the screenshot below: enter image description here
  5. Choose your module from the list in the dialog that comes up: enter image description here

Hopefully your project should be building normally now. After you do a build, a jar file for your Java library will be placed in the build/libs directory in your module's directory. If you want to build the jar file by hand, you can run its jar build file task from the Gradle window: enter image description here

Upvotes: 66

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