Android 9 Pie
Android 9 harnesses the power of artificial intelligence to give you more from your phone. Now it's smarter, faster and adapts as you use it.
![Android 9 Pie logo](https://developer.android.google.cn/static/images/home/android-p-clear-bg-with-shadow.png?authuser=9)
Make your apps compatible
Test your apps for compatibility with Android 9. Just download a device system image, install your current app, and test in areas where behavior changes may affect the app. Update your code and publish, using the app's current platform targeting.
Download a system image
How to get Android 9 for your Pixel device
Behavior changes
System changes that affect all apps on Android 9
Compatibility testing
Easy steps to reach compatibility
What's in Android 9?
Simplicity, speed, and many new ways to extend your apps.
Get started with Android 9!
Start by targeting Android 9 and supporting its behavior changes. When you're ready, extend your apps with new features and APIs.
Targeting Android 9
Studio setup and how to target Android 9
Behavior changes for apps targeting API 28+
System changes for apps targeting Android 9
Android 9 features
Extend your apps with Android 9