Android Studio - How to gitignore your signing.

.gradle

apply plugin: 'com.android.application'

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

android {
    // Add a gradle.properties to your root to make this workd:
    //compileSdkVersion Integer.parseInt(project.ANDROID_BUILD_SDK_VERSION)
    //buildToolsVersion project.ANDROID_BUILD_TOOLS_VERSION
    
    defaultConfig {
        minSdkVersion 7
        //targetSdkVersion Integer.parseInt(project.ANDROID_BUILD_TARGET_SDK_VERSION)
        //versionName project.VERSION_NAME
        //versionCode Integer.parseInt(project.VERSION_CODE)
    }

    signingConfigs { release }

    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }
  
}

// Add a file signing.properties

File propFile = file('signing.properties');
if (propFile.exists()) {
    def Properties props = new Properties()
    props.load(new FileInputStream(propFile))

    if (props.containsKey('STORE_FILE') && props.containsKey('STORE_PASSWORD') &&
            props.containsKey('KEY_ALIAS') && props.containsKey('KEY_PASSWORD')) {
        android.signingConfigs.release.storeFile = file(props['STORE_FILE'])
        android.signingConfigs.release.storePassword = props['STORE_PASSWORD']
        android.signingConfigs.release.keyAlias = props['KEY_ALIAS']
        android.signingConfigs.release.keyPassword = props['KEY_PASSWORD']
    } else {
        android.buildTypes.release.signingConfig = null
    }
} else {
        android.buildTypes.release.signingConfig = null
}

gradle.properties

VERSION_NAME=1.0.0
VERSION_CODE=1

ANDROID_BUILD_TARGET_SDK_VERSION=19
ANDROID_BUILD_TOOLS_VERSION=21.1.2
ANDROID_BUILD_SDK_VERSION=21

signing.properties

STORE_FILE=/path/to/your.keystore
STORE_PASSWORD=yourkeystorepass
KEY_ALIAS=projectkeyalias
KEY_PASSWORD=keyaliaspassword