Step1: Download and install Android Studio.
Step2: Create new project with empty activity.
Step3: Create a emulator(a virtual device) of your choice from device manager.
Step5: Run App from button or Shift + 10.
Step6: in java android App we use xml language for UI.
main file name: activity_main.xml
file location: Android> App>res>layout
Step7: All java files are under folder Android> App>java>com
main java file name: MainActivity.java