Tutorials and more: Android and Gradle

Gradle: is a build system for Android apps.

First install gradle - https://gradle.org/downloads/

Info:
Below image shows three directories
1. Vanilla
2. Strawberry
3. Main

Vanilla and Strawberry are the apk build flavors, this both dirctories by default will use the settings from Main folders(java/... ; res/...; AndroidManifest.xml), if we declare this folders inside Vanilla or Strawberry it will override the setting from Main.
Ex:
Change icon for Vanilla apk. You can modified the app icon by adding res directory to the project.

Commands:

run: $chmod +x gradlew

info: $./gradlew -P
Generate APKs: $./gradlew assemble
Generate Taks: $./gradlew tasks

Install apk build genreated by tasks: $./gradlew installVanillaDebug

build- generates .apk file, need to configure: $./gradlew build

clean- deletes the generated .apk file: $./gradlew clean

version: $./gradlew -v

Enable the Gradle Daemon:

Via properties file - add org.gradle.daemon=true to GRADLE_USER_HOME»/gradle.properties

Gradle Tutorial
Create build flavor with different MainActivity (start activity)
1. In Android Studio select Project view
2. app/src/main create new Java Folder name "full"