Signing config

build.gradle

if (file('signing.gradle').exists()) {
    apply from: 'signing.gradle'
}
android{
    ...
    buildTypes {
        debug{
            versionNameSuffix " Debug"
            minifyEnabled false
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.releaseConfig
        }
        release {
            minifyEnabled false
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.releaseConfig
        }
    }
    ...
}
...

signing.gradle

android {

  signingConfigs {
      releaseConfig {
          storeFile file(".../path/to/keystore")
          storePassword 'STOREPASS'
          keyAlias "KEYALIAS"
          keyPassword 'KEYPASS'
      }
  }


}