Reusing the same code across multiple Android Studio projects

Question

I have some code I'd like to use across multiple different projects. Let's say it's some e-commerce code that handles things like payments and shopping carts.

It seems inefficient and dangerous to copy-paste everything across different projects. And if I add one feature or fix one bug in the core e-commerce module, I'd like that change to be reflected in other projects using it too.

I would also like to re-use some of the Activities, Fragments, Adapters too.

What is a good approach to this?

you can create separate package for Activities,Fragments...and reuse them whenever you need — Rehan Shikkalgar, Feb 02 '17 at 07:28

score 5 · Answer 1 · edited May 23 '17 at 11:54

When we have a library project that needs to be shared to every project on a local computer, we can make use of Maven.

A. Here the step in your library that we will you for the project:

Make a library project from Android Studio.

Add Gradle Android Maven plugin to root build.gradle

buildscript {
  repositories {
    mavenCentral()
  }

  dependencies {
    classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
  }
}

Add apply plugin for step 1 in your library build.gradle. (NOT root build.gradle):

apply plugin: 'com.android.library'
apply plugin: 'com.github.dcendents.android-maven'

Add the following after the apply plugin, this line to determine your library when adding to project:
```
group = 'com.yourpackage.yourlibrary'
version = '1.0'
```
Add the following code in your settings.gradle:
```
rootProject.name = 'yourlibrary' 
```
Then publish it to your local maven with:
```
./gradlew install
```
Or you can use gradle option in Android Studio.
Your library will be installed in $HOME/.m2/repository. Remember that to use the library you need to add like this:
```
  Groupid:artifactid:versionid
```
Artifactid will be package name of your library.

B. Here the step in your Project which using the library:

Add the following code in your root build.gradle:
```
  mavenLocal() // for local maven.
```

This for getting the local library maven that we have installed in step A

Then in your app project.gradle, add compile for the library:
```
compile 'com.yourpackage.yourlibrary:yourlibrary:1.0'
```

Reusing the same code across multiple Android Studio projects

2 Answers2

Linked