Unity 2017无法在三星Galaxy S8上构建运行Android项目求助

Hey Eric, let's troubleshoot why your Unity 2017.4.0f1 build won't install on your Galaxy S8. I’ve dealt with similar compatibility issues between older Unity versions and Android 8.0 devices, so here are targeted fixes to try:

1. Verify Unity Android Build Settings #

• API Level Matching: Check your build configuration (File > Build Settings > Player Settings > Android > Other Settings):
  • Set Minimum API Level to Android 8.0 (API Level 26) or lower (ensure it’s compatible with your device’s OS).
  • Set Target API Level to match your device’s Android version (API 26 for 8.0) or use Automatic (highest installed).
• Architecture Compatibility: The Galaxy S8 uses a 64-bit ARM chip (arm64-v8a). In the same Other Settings menu, under Configuration > Scripting Backend, make sure you’ve checked arm64-v8a (or both armeabi-v7a and arm64-v8a) in the Target Architectures list. Unity 2017 sometimes defaults to 32-bit only, which causes installation failures on 64-bit devices.
• Build System Switch: Try switching the Build System from Gradle to Internal in the Build Settings window. Older Unity versions can have Gradle configuration conflicts with JDK 10 or Android 8.0.

2. Adjust Device Settings for Installation #

• Enable Unknown Sources: On your Galaxy S8, go to Settings > Security and Privacy > Unknown Sources and toggle this on. Android 8.0 restricts app installs from non-Google Play sources by default, so this is a common fix.
• Clear Space & Uninstall Old Versions:
  • Ensure your device has enough free storage (at least 1GB more than your APK size) — insufficient space often triggers "App not installed" errors.
  • If you’ve ever installed a previous version of this app, fully uninstall it (including residual data via Settings > Apps > [Your App] > Uninstall) before trying again.

3. Resolve JDK 10 Compatibility Issues #

Unity 2017.4.0f1 is officially designed to work with JDK 8, not JDK 10. JDK 10 introduces changes that can break Unity’s build pipeline, especially during app signing. Here’s how to fix this:

• Install JDK 8 (if you don’t have it already).
• In Unity, navigate to Edit > Preferences > External Tools and set the JDK path to your JDK 8 installation directory.
• Rebuild your APK and attempt installation again.

4. Use ADB to Get Detailed Error Messages #

Instead of just tapping the APK manually, use the Android Debug Bridge (ADB) to install the app — this will give you a specific error code that points directly to the problem:

1. Connect your Galaxy S8 to your computer via USB (ensure USB Debugging is enabled in Developer Options).
2. Open a command prompt/terminal and run:

   adb install /path/to/your/app.apk
   

3. Look for error codes like:
   • INSTALL_FAILED_NO_MATCHING_ABIS: Architecture mismatch (fix via step 1).
   • INSTALL_FAILED_UPDATE_INCOMPATIBLE: Old app version isn’t fully uninstalled (fix via step 2).
   • INSTALL_FAILED_SIGNATURE_ERROR: JDK/signing issue (fix via step 3).

5. Check ADB & Unity Remote 5 Setup (For Debugging) #

Since you’re using Unity Remote 5, make sure your device is properly connected for debugging:

• Enable Developer Options on your S8 (tap Settings > About Phone > Build Number 7 times).
• In Developer Options, turn on USB Debugging and USB Installation.
• Install the official Samsung USB driver to ensure your computer recognizes the device correctly.

内容的提问来源于stack exchange，提问作者Eric Ahn