How do I set up IntelliJ IDEA for Android applications?

Installing and Configuring Android SDK

Make sure to download and install the Java JDK from Oracle's website before you splash into the Android realm with IntelliJ IDEA. The Android SDK can be installed as a standalone package or through the Android Studio bundle.

Enable Android SDK:

• Fire up IntelliJ IDEA.
• Navigate File -> Project Structure... -> SDKs.
• Click '+', and if you installed Android Studio, direct it to the SDK's home destination; for OSX, that’s typically /Users/'yourUser'/Library/Android/sdk. Ensure that the android.jar is included under the Platform Settings.
• Guide: Visibility Issues on Mac? Enable the Library folder or use Android Studio to find the SDK location.

Crafting an Android Virtual Device

Constructing your Android Virtual Device (AVD) is pivotal for testing. Within IntelliJ IDEA:

• Employ either Tools -> AVD Manager or Edit Configurations to craft a virtual device.
• Verifying you have installed the necessary Android API level and Google APIs, for a complete set of features, via the SDK Manager might be a good idea.

Special Configurations for Advanced Android Development

Java SDK: Setting the Stage

Walk over to File -> Project Structure... -> Project, and call upon a Java SDK version that plays well with your Android SDK version. Ensuring compatibility is the secret sauce to a seamless development experience.

Build Targets: Your Silent Partner

Choose your Android build target within the Project Structure. This is vital in making sure your app is constructed against the desired version of Android.

Dependencies: The Unsung Heroes

For an intricate project with multiple modules, you will need to go to File -> Project Structure... -> Modules, and adjust the module dependencies for your Android project.

Something Off with Class Calls?

If you encounter a ClassNotFoundException, review your project structure and module dependencies. One tiny hiccup there could be the culprit.

Too many Android Versions, too little Time

Add various Android version targets to maintain compatibility across a range of devices. Backward compatibility testing was never easier!

Git It Under Control

IntelliJ comes with exceptional support for version control systems. Navigate to the VCS menu and select your preferred version control system for a smooth development experience.

Operating System Tips for a Seamless Journey

Calling all macOS Users

• Use ⌘+Space for a swift spotlight search and type Android/sdk to locate your SDK on a Mac.
• Tools not behaving as expected? Check for additional dependencies or SDK tool updates that IntelliJ IDEA might need on macOS.

Windows Users, Lend an Ear

• Set your Environment Variables for JAVA_HOME and ANDROID_HOME. This ensures a smoother interaction with IntelliJ IDEA and the command line.
• Ensure Hyper-V is enabled for the emulator to perform robustly on Windows 10 and later.

Linux Aficionados Pay Heed

• Permissions can get tricky on Linux. Ensure proper permissions with chmod if necessary.
• Install 32-bit compatibility libraries for Android dependencies if you're running a 64-bit system.

Troubleshooting your Worst Nightmares

How to Quell Build & Sync Issues

A Gradle sync failure or build issues can often throw spanners in the works:

• Run File -> Invalidate Caches / Restart to invalidate caches and restart IDEA.
• Use the Gradle tool window to manually sync your project with the Gradle files. `// When in doubt, resync! 😉

Emulator will not co-operate

The AVD not running can usually be beaten into submission by:

• Wiping the AVD's data from within the AVD Manager. // Clean slate, fresh start! 🧼
• Creating a spanking new AVD if the problem persists.

Deployment headaches

Issues with deploying your app to the AVD or physical device are usually caused by:

• Incorrect Run/Debug configurations.
• Failing to enable USB debugging on your physical device. //Who forgot the USB debugging?