How to add local .jar file dependency to build.gradle file?

According to the documentation, use a relative path for a local jar dependency as follows.

Groovy syntax:

dependencies {
    implementation files('libs/something_local.jar')
}

Kotlin syntax:

dependencies {
    implementation(files("libs/something_local.jar"))
}

If you really need to take that .jar from a local directory,

Add next to your module gradle (Not the app gradle file):

repositories {
   flatDir {
       dirs 'libs'
   }
}


dependencies {
   implementation name: 'gson-2.2.4'
}

However, being a standard .jar in an actual maven repository, why don't you try this?

repositories {
   mavenCentral()
}
dependencies {
   implementation 'com.google.code.gson:gson:2.2.4'
}

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