sdkmanager "platform-tools" "build-tools;28.0.3"    "platforms;android-26" "platforms;android-28"

sdkmanager --licenses

C:Dev>SET ANDROID_HOME=C:/android-sdk&&SET PATH=C:/gradle-4.0/bin;%PATH%&&SET JAVA_HOME=C:/Program Files/Java/jdk1.8.0_31&&cd C:/Android/dev/ProgramName&&gradle clean

> You have not accepted the license agreements of the following SDK components:
[Android SDK Build-Tools 28.0.3, Android SDK Platform 28].
Before building your project, you need to accept the license agreements and complete the installation of the missing components using the Android Studio SDK Manager.