FranRiadigos

applicationVariants.all { variant ->
    variant.outputs.all {
        outputFileName =
                "${project.name.toLowerCase()}-" +               // app
                "${variant.flavorName}-" +                       // develop
                "${variant.buildType.name}-" +                   // debug
                "${versionCode}" +                               // 10101
                 (variant.buildType.name.contains("release")
                 && !variant.signingReady ? "-unsigned" : "") +  // unsigned
                        

FranRiadigos

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:animateLayoutChanges="true">
    
    <!-- This View acts like a helper guideline 
         and anchors to the "relative_view" TextView. -->
    <View