How to Set Up Gradle and Android Studio to Do Release Build

How to set up gradle and android studio to do release build?

in the latest version of android studio, you can just do:

./gradlew assembleRelease

or aR for short. This will produce an unsigned release apk. Building a signed apk can be done similarly or you can use Build -> Generate Signed Apk in Android Studio.

See the docs here

Here is my build.gradle for reference:

buildscript {
  repositories {
    mavenCentral()
  }
  dependencies {
    classpath 'com.android.tools.build:gradle:0.5.+'
  }
}
apply plugin: 'android'

dependencies {
  compile fileTree(dir: 'libs', include: '*.jar')
}

android {
compileSdkVersion 17
buildToolsVersion "17.0.0"

sourceSets {
    main {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src']
        resources.srcDirs = ['src']
        aidl.srcDirs = ['src']
        renderscript.srcDirs = ['src']
        res.srcDirs = ['res']
        assets.srcDirs = ['assets']
    }

    // Move the tests to tests/java, tests/res, etc...
    instrumentTest.setRoot('tests')

    // Move the build types to build-types/<type>
    // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
    // This moves them out of them default location under src/<type>/... which would
    // conflict with src/ being used by the main source set.
    // Adding new build types or product flavors should be accompanied
    // by a similar customization.
    debug.setRoot('build-types/debug')
    release.setRoot('build-types/release')

}

buildTypes {
    release {

    }
}

How to set my gradle for final release apk

On the lower left of the Studio window there's a docked view called "Build Variants".

Open it and choose the release variant.

ps. you are adding compile 'com.google.android.gms:play-services:+' twice.

Android Studio gradle takes too long to build

Found the reason!! If Android Studio has a proxy server setting and can't reach the server then it takes a long time to build, probably its trying to reach the proxy server and waiting for a timeout. When I removed the proxy server setting its working fine.

Removing proxy: File > Settings > Appearance & Behavior > System settings > HTTP Proxy

How to execute Android Tests with gradle before each release build?

Finally I managed to do that. I have added the following configuration to my build.gradle file in my android studio project:

// execute android tests before realising a new apk
tasks.whenTaskAdded { task ->
    if (task.name == 'assembleRelease')
        task.dependsOn('connectedAndroidTest')
}

android {
signingConfigs {
    release {
        keyAlias 'key'
        keyPassword 'password'
        storeFile file('/path/to/release_keystore.jks')
        storePassword 'password'
    }

}
buildTypes {
    debug {
        signingConfig signingConfigs.release
    }
    release {
        signingConfig signingConfigs.release
    }
}

After doing that I'm able to run all android tests when building a release apk. If the tests are failing no apk is built.

How to create a release signed apk file using Gradle?

Easier way than previous answers:

Put this into ~/.gradle/gradle.properties

RELEASE_STORE_FILE={path to your keystore}
RELEASE_STORE_PASSWORD=*****
RELEASE_KEY_ALIAS=*****
RELEASE_KEY_PASSWORD=*****

Modify your app/build.gradle, and add this inside the android { code block:

...    
signingConfigs {

   release {
       storeFile file(RELEASE_STORE_FILE)
       storePassword RELEASE_STORE_PASSWORD
       keyAlias RELEASE_KEY_ALIAS
       keyPassword RELEASE_KEY_PASSWORD

       // Optional, specify signing versions used
       v1SigningEnabled true
       v2SigningEnabled true
   }
}

buildTypes {
        release {
            signingConfig signingConfigs.release
        }
}
....

Then you can run gradle assembleRelease

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Also see the reference for the signingConfigs Gradle DSL

Android release build generated in Android Studio 3.0 unable to install

Before making the build, check if you have instant run enabled or not.
It is enabled by default and can be found under
File -> Settings -> Build,Execution,Deployment -> Instant Run

Disable it and then try rebuilding the apk.
Check comments and answers here

Now, if you are building a release apk and you have selected Signature Version V2(Full APK Signature), in the generate signed apk dialog, app might not install after the build is made.

You need to re-generate a signed apk with both the signature versions enabled i.e V1 & V2. You will get this option under Build -> Generate Signed APK.

Combining this with the disable instant run thing, your apk should install smoothly.

Android Studio: run/debug release version of app

There's a window called 'Build Variants' where you can choose, which version you want to be installed on your emulator/device.

You also have to add debuggable true to your release build to be able to debug it.

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