安装Android Studio报错：Android SDK缺失、过期或损坏（已装Java SE 9）

Hey there, let’s work through this Android Studio error you’re hitting after setting up Java SE 9. I’ve run into this exact issue a handful of times, and it almost always ties back to either Java version compatibility snags or misconfigured SDK settings. Here’s how to fix it step by step:

1. Sort Out Java Version Compatibility #

Android Studio has strict Java version requirements, and Java SE 9 can clash with older (or even some newer) versions of the IDE. Here’s what to do:

• Open Android Studio, head to File > Project Structure > SDK Location.
• Look at the JDK Location field. If it’s pointing to your Java SE 9 installation, switch it to a more compatible version: Java 8 is the most stable for most Android development workflows, while Java 11 is officially supported for newer Android Studio releases.
• If you don’t have a compatible JDK installed, let Android Studio handle it: check the Use embedded JDK (recommended) box. This installs a dedicated JDK that’s guaranteed to play nice with the IDE, no more version mismatches.

2. Verify SDK Path and Fix Corrupted Files #

Sometimes the SDK path is wrong, or some files got messed up during installation:

• In the same SDK Location menu, double-check the Android SDK Location path. Make sure it points to a valid folder where your SDK is stored (if you’re unsure, click the ... button to browse and select the correct directory).
• If the path is correct but the error persists, click the SDK Manager button (the download-arrow icon) next to the SDK location.
• In the SDK Manager, go to the SDK Tools tab. Ensure Android SDK Build-Tools is checked and updated to the latest version, and verify Android SDK Platform-Tools is also up to date.
• If you suspect corrupted files, click the Edit button next to the SDK location, then select Clear Cache to wipe any damaged cached data. You can also try re-installing problematic components by unchecking them, clicking Apply, then re-checking and applying again.

3. Tweak Environment Variables (If Necessary) #

Incorrect system environment variables can throw off SDK detection:

• Check if you have ANDROID_HOME or ANDROID_SDK_ROOT set. If they point to an old or wrong path, update them to match your current SDK location.
• Make sure your JAVA_HOME variable is set to the compatible JDK version you’re using with Android Studio (not Java SE 9 if it’s causing issues).

4. Restart Android Studio with a Clean Cache #

Sometimes a fresh start with cleared caches does the trick:

• Go to File > Invalidate Caches... in Android Studio.
• Select Invalidate and Restart to clear all cached data and reboot the IDE. This often fixes weird, hard-to-trace issues like this one.

内容的提问来源于stack exchange，提问作者Ahmed Mahmoud