To start with the programming in Android, we have to setup environment and which requires software that is as follow as

Step 1 Java Setup

The first requirement for android programming is setup java environment that generates Bytecode for the program which is written in java it provides a compiler that compiles the code and generates .class file through Java Virtual Machine(JVM).To download java software go to URL https://java.com/en/download/ and then setup path in the computer that compiles your program.

Right Click on My Computer >> Properties >> Click on Environment Variables Popup Window will appear as shown

Step 2 Android Studio Setup

You have download Android Studio from https://developer.android.com/studio/index.html, then there is no need for extra software. Please, download the latest Version so that you can get Latest Framework and API Level which support the latest version Android operating System. It takes times because of its size around GB.

Internet Service Provider (ISP).SDK is installation process takes few minutes. When downloading is completed, run the setup and wait until SDK is installed via the network. To download SDK, you have required internet setting through Internet Service.If downloading is not start automatically or runtime then configure SDK Manually

All Program >>Right Click on Configuration >>SDK Manager 

Click on Install packages then downloading is started.

Another way To Start with Android

You have start Android app development using Eclipse IDE (Integrated Development Environment) that help the programmer to achieve the goal but before you started developing an app in IDE, you have needed some plugin download.

Step 1: Download and configure Java SE as explained above

Step 2: Download Eclipse IDE

It is the second step in which you have to download Eclipse from https://www.eclipse.org/downloads/ in ZIP file. You have to unzip the file in a located drive. The home window of Eclipse look like as

Step 3: Download ADT (Android Development Tools) Plugin

Help>> Software Updates >>New Software Install and pop window appear >>click on Add Button to add Plugin URL https://developer.android.com/studio/tools/sdk/eclipse-adt.html

As soon as you added URL, the next window appears as shown in the image below. Now click on select all option for starting the plugin.Click on the Next button

Now, finally create AVD Manager using following procedures

Windows (Eclipse IDE) >> AVD Manager