Installing Android Studio

Android Studio provides everything you need to start developing apps for Android, including the Android Studio IDE and the Android SDK tools.
If you didn't download Android Studio, go download Android Studio now, or switch to the stand-alone SDK Tools install instructions.
Before you set up Android Studio, be sure you have installed JDK 6 or higher (the JRE alone is not sufficient)—JDK 7 is required when developing for Android 5.0 and higher. To check if you have JDK installed (and which version), open a terminal and type javac -version. If the JDK is not available or the version is lower than 6, go download JDK.

To set up Android Studio on Windows:

1. Launch the .exe file you just downloaded.
2. Follow the setup wizard to install Android Studio and any necessary SDK tools. On some Windows systems, the launcher script does not find where Java is installed. If you encounter this problem, you need to set an environment variable indicating the correct location.
   
   Select Start menu > Computer > System Properties > Advanced System Properties. Then open Advanced tab > Environment Variables and add a new system variable JAVA_HOME that points to your JDK folder, for example C:\Program Files\Java\jdk1.7.0_21.
   

The individual tools and other SDK packages are saved outside the Android Studio application directory. If you need to access the tools directly, use a terminal to navigate to the location where they are installed. For example:
\Users\<user>\sdk\

To set up Android Studio on Mac OSX:

1. Launch the .dmg file you just downloaded.
2. Drag and drop Android Studio into the Applications folder.
3. Open Android Studio and follow the setup wizard to install any necessary SDK tools. Depending on your security settings, when you attempt to open Android Studio, you might see a warning that says the package is damaged and should be moved to the trash. If this happens, go to System Preferences > Security & Privacy and under Allow applications downloaded from, select Anywhere. Then open Android Studio again.
   

If you need use the Android SDK tools from a command line, you can access them at:
/Users/<user>/Library/Android/sdk/

To set up Android Studio on Linux:

1. Unpack the downloaded ZIP file into an appropriate location for your applications.
2. To launch Android Studio, navigate to the android-studio/bin/ directory in a terminal and execute studio.sh. You may want to add android-studio/bin/ to your PATH environmental variable so that you can start Android Studio from any directory.
   
3. If the SDK is not already installed, follow the setup wizard to install the SDK and any necessary SDK tools.
   Note: You may also need to install the ia32-libs, lib32ncurses5-dev, and lib32stdc++6 packages. These packages are required to support 32-bit apps on a 64-bit machine.

Android Studio is now ready and loaded with the Android developer tools, but there are still a couple packages you should add to make your Android SDK complete.

Continue: Adding SDK Packages

Features

New features are expected to be rolled out with each release of Android Studio. The following features are provided in the current version:

• Live Layout: WYSIWYG Editor - Live Coding - Real-time App Rendering.
• Gradle-based build support.
• Android-specific refactoring and quick fixes.
• Lint tools to catch performance, usability, version compatibility and other problems.
• ProGuard and app-signing capabilities.
• Template-based wizards to create common Android designs and components.
• A rich layout editor that allows users to drag-and-drop UI components, option to preview layouts on multiple screen configurations.
• Support for building Android Wear apps
• Built-in support for Google Cloud Platform, enabling integration with Google Cloud Messaging and App Engine.^[12]

System requirements

	Windows	OS X	Linux
OS version	Microsoft Windows 10/8.1/8/7/Vista/2003/XP (32 or 64 bit)	Mac OS X 10.8.5 or higher, up to 10.10 to up 10.10.2 up 10.10.3 on 10.10.4 (Yosemite)	GNOME or KDE or Unity desktop on Ubuntu or Fedora or GNU/Linux Debian
RAM	2 GB RAM minimum, 4 GB RAM recommended
Disk space	500 MB disk space
Space for Android SDK	At least 1 GB for Android SDK, emulator system images, and caches
JDK version	Java Development Kit (JDK) 7 or higher
Screen resolution	1280x800 minimum screen resolution

Android Studio vs. Eclipse ADT comparison

Feature	Android Studio	Eclipse ADT
Build system	Gradle	Ant
Maven-based build dependencies	Yes	No
Build variants and multiple-APK generation	Yes	No
Advanced Android code completion and refactoring[vague]	Yes	No
Graphical layout editor	Yes	Yes
APK signing and keystore management	Yes	Yes
NDK support	Beta	Yes

Adding SDK Packages

Android Design Principles

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