buildTypes {

  debug {
    minifyEnabled false
    proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-
    rules.txt'

  }
}

myproductionbuild{
    minifyEnabled true
    proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-
    rules.txt'
}