Sample app gradle file signing config

build.gradle

android {
    signingConfigs {
        release {
            storeFile = file('release.keystore')
            storePassword = 'actualReleasePassword'
            keyAlias = 'keyAliasName'
            keyPassword = 'actualReleaseKeyPassword'
        }
        debug {
            storeFile = file('debug.keystore')
            storePassword = 'actualDebugPassword'
            keyAlias = 'keyAliasName'
            keyPassword = 'actualDebugKeyPassword'
        }
    }
    compileSdkVersion 27
    buildToolsVersion '27.0.3'
    defaultConfig {
        applicationId "xyz.umarhussain.app"
        minSdkVersion 21
        targetSdkVersion 27
        versionCode 18
        versionName "1.0.9"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        multiDexEnabled true
        vectorDrawables.useSupportLibrary = true
        resConfigs "en"
    }
    buildTypes {
        debug {
            debuggable true
            useProguard true
            applicationIdSuffix '.debug'
            signingConfig signingConfigs.debug
        }
        release {
            debuggable false
            shrinkResources true
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.release
        }
    }
}