To become a Mobile Application Developer now Android is the first choice for IT professionals.As this is based on JAVA tachnology candidate must aware with core java programming.To develop an Android App initially Eclipse IDE with the ADT plugin was the preferred choice but as Google stop support to Eclipse IDE now Android Studio is the only plateform for Android App Development.
Before Installing Android Studio its better that you should install JAVA SDK latest version.
First Download Android Studio and start the setup file.
Follow the setup instruction in wizard.During installation it will also update and install android packages.You should keep patience because it will take time to complete.
You should create an emulator to get an output of your program.
Go to Tools - > Android -> AVD manager
In AVD Manager click on "Crete Virtual Device". Here you will find multiple device with different screen size and resolutions with multiple android API versions.You can choose anyone as per your requirment.
As Android AVD require VTX technology must be enable to your PC or Laptop.You must make enable it from your system bios setting.Android AVD support Intel based Vertulization Technology having series I3 and above.
There is also a need to install HAXM installer to process VTX technology.Which you can install from SDK Manager where you can find in SDK tools tab.You have to download and install Intel X86 Emulator Accelator (HAXM).