The first and most important piece of software you need to download is Android Studio 2. After you have
downloaded and installed Android Studio 3, you can use the SDK Manager to download and install multiple versions of the Android SDK. Having multiple versions of the SDK available enables you to write programs that target different devices. For example, you can write one version of an application that specifically targets Android Nougat, but because that flavor of Android is
on less than 1% of devices, with multiple versions of the SDK you can also write a version of your app that uses older features and targets Marshmallow or Lollipop users. You can use the Android Device Manager to set up device emulators.
You can download Android Studio 3 from http://developer.android.com/sdk/index.html
Android Studio 3 is packaged in an executable. Run the install process to set up Android Studio 2. After you’ve downloaded and run the setup executable, use the following steps to go through the installation process:
- Accept the terms and conditions shown in Figure
- If you have an older version of Android Studio already installed on your computer, the Android Studio Setup prompts you to automatically uninstall Even though the old version of Android Studio will be uninstalled, the settings and configurations are retained. You have an opportunity to reapply those settings and configurations to Android Studio 3 after the setup has completed. Figure shows the screen where you are prompted to uninstall an old version of Android Studio.
3.Click Next on the Welcome to Android Studio Setup screen .
Installing Android Studio 3 could take a few minutes, depending on the speed of your com- puter. You are presented with a progress bar to help you track the state of the Android Studio 2 is installed with a default SDK (Software Development Kit), in this case Marshmallow. Later in the process you have the opportunity to install other SDKs. The Android SDK allows you to develop and write applications geared for a specific version
of Android. In other words, applications written with the Marshmallow SDK run on Android devices running Marshmallow, but they also possibly run on other versions depending on which features of the SDK you used in the application.
When the install is complete, you will see a Completing Android Studio Setup screen . Leave the Start Android Studio box checked and click…
Android Studio prompts you to either import settings from a previous version of Android Studio or continue with new settings. If you uninstalled a previous version in the first step of the installation process, Android Studio offers you a chance to recover the settings used in that previous version and apply them to Android Studio