新手求助：Android Studio无法在Memu模拟器安装Flutter项目，报INSTALL_FAILED_VERIFICATION_FAILURE错误

Hey there! Let's work through this error you're facing when trying to run your Flutter app on the MEmu emulator. That INSTALL_FAILED_VERIFICATION_FAILURE usually pops up when the emulator's app verification blocks the installation, or there's a mismatch/cache issue with ADB. Here are some actionable steps to fix it:

1. Disable ADB installation verification on MEmu #

This is the most common fix for this error. You can do it either through the emulator's settings or via an ADB command:

• Via MEmu Settings: Open MEmu, go to Settings > Security, then look for and disable options like "Verify apps during installation" or "Unknown sources verification" (the exact name might vary slightly depending on your MEmu version).
• Via ADB Command: Open your terminal/CMD, run this command after connecting to MEmu:

  adb shell settings put global verifier_verify_adb_installs 0
  

2. Clear Flutter and Gradle caches #

Corrupted cache files can sometimes cause installation glitches. Run these commands in your project's root directory:

• First, clean Flutter's cache:

  flutter clean
  

• Then navigate to the Android folder and clean Gradle's cache (Windows users skip the ./):

  cd android
  ./gradlew clean
  

• Go back to the project root and fetch dependencies again:

  cd ..
  flutter pub get
  

3. Ensure ADB version compatibility between Android Studio and MEmu #

Mismatched ADB versions often lead to weird installation errors. Here's how to check and fix it:

• Open CMD, navigate to your MEmu installation directory (usually something like C:\Program Files\Microvirt\MEmu), then run:

  adb version
  

• In Android Studio's terminal, run the same adb version command to check its version.
• If the versions don't match, copy the ADB files (adb.exe, AdbWinApi.dll, AdbWinUsbApi.dll) from Android Studio's platform-tools folder (typically in C:\Users\<YourUsername>\AppData\Local\Android\Sdk\platform-tools) and replace the ones in MEmu's directory. Then restart both ADB and MEmu.

4. Reconnect MEmu and restart ADB services #

Sometimes a fresh connection fixes the issue:

• Disconnect from MEmu first:

  adb disconnect localhost:21503
  

• Kill and restart the ADB server:

  adb kill-server
  adb start-server
  

• Restart your MEmu emulator, then reconnect:

  adb connect localhost:21503
  

• Try running your app again with flutter run.

5. Verify debug signing configuration (last resort) #

While Flutter handles debug signing automatically, double-checking won't hurt. Open android/app/build.gradle and make sure the debug build type uses the default debug signing config:

buildTypes {
    debug {
        signingConfig signingConfigs.debug
    }
}

After trying these steps, your app should install and run on MEmu without that verification error.

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