how to create a jar file from android studio

Question

I have a fairly latest version of android studio, I have created a module under a project which is basically supposed to be a library, when I build it, it creates an ".aar" file , what I want is .jar file as this library is supposed to be used with eclipse as well.

The library contains activity as well, is there any way by which I can create a .jar file which I can use on Eclipse as well Android Studio ?

I have already created this module and tried building , as a result it generated .aar file and not a .jar file.

see this link you may understand http://stackoverflow.com/questions/21712714/how-to-make-a-jar-out-from-an-android-studio-project — Hanuman, Jun 11 '15 at 13:21
@Allu have seen that link the user wants to create jar for its java code and not entire module , in my case i have resources too — vishal dharankar, Jun 12 '15 at 07:47
You cannot bundle resources in a JAR. That is what AAR files are here for. — shkschneider, Jun 12 '15 at 09:29

shkschneider · Answer 1 · 2015-06-16T12:15:51.810

9

I found a way to achieve this, plain simple, using Gradle 2.2.1:

task jar(type: Jar, dependsOn: 'assembleRelease') {
    from fileTree(dir: 'build/intermediates/classes/release')
}

Place this in your library module. It will compile it as release and produce a JAR file in: build/libs.

bash gradlew jar or use your IDE to target that jar Gradle task.

edited Jun 16 '15 at 12:15

answered Jun 16 '15 at 10:03

shkschneider

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how about adding resources ? and some third party lib ? – vishal dharankar Jun 16 '15 at 10:20
JAR files *cannot* embed resources. That is why AAR files exists. And I guess third party libs are also JARs... That really answers your specific question IMHO. The rest would require AAR file (they *do* have a reason to exist). – shkschneider Jun 16 '15 at 12:15
I wish you have read my question carefully then :) i have an activity means resources too. – vishal dharankar Jun 16 '15 at 16:31
Impossible with à JAR file. Again, that is why AAR files came into place. – shkschneider Jun 17 '15 at 00:18
2

As of AGP 4.0 the path is `build/intermediates/javac/release/classes` – satur9nine Jan 08 '21 at 01:51
To use with maven publish gradle plugin, `artifact(tasks["bundleReleaseClasses"].outputs.files.singleFile)` – Diamond Feb 27 '22 at 21:42

score 1 · Answer 2 · answered Jun 12 '15 at 17:43

aar is not related to AS or eclipse but is an AndroidARchive for Android applications like JavaARchives are for java applications. Because Android is java based, jars can be used. But to take android specialities into account, like resource bundles, an aar is the right thing to use.

vishal dharankar · Accepted Answer · 2015-06-18T08:25:36.410

0

Currently gradle based builds doesnt seems to be allowing to create jar with android studio, I decided to go for Intelij it has necessary option and does what i want , i can use community edition.

***Update**** Even the jar produced by Intelij with resources don't work , obviously its not easy to have a jar with resource , so decided to opt for .aar and hoping that Eclipse also gets support for .aar when gradle supports lands there, as that was my main concern.

edited Jun 18 '15 at 08:25

answered Jun 12 '15 at 17:14

vishal dharankar

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Found a way that works for me (as of Gradle 2.2.1), see my new answer. – shkschneider Jun 16 '15 at 10:03

score 0 · Answer 4 · answered Dec 08 '20 at 09:25

Add this in your library's gradle file:

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

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

createJar.dependsOn(deleteJar, build)

You need to check path of your generated classes.jar: build/intermediates/packaged-classes/release/

Create lib folder in your lib's root folder if it is not there

Go to gradle build: Android Studio --> View --> Toll Windows --> Gradle

Select your module(:library) --> Tasks --> other --> Double click on createJar task

score 0 · Answer 5 · answered Dec 09 '20 at 12:01

0

You can just simply unzip the aar file to get the separated pieces of files.

answered Dec 09 '20 at 12:01

glzlaohuai

76
5

how to create a jar file from android studio

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