Flutter Error 01: The plugin firebase_auth requires a higher Android SDK version

Flutter Error 01: The plugin firebase_auth requires a higher Android SDK version.

This error occurs because the firebase_auth plugin requires a minimum Android SDK version to function correctly. To resolve this, you need to update the minSdkVersion and potentially other configurations in your android/app/build.gradle file.

Steps to Fix:

1. Update the minSdkVersion:
   • Open your android/app/build.gradle file.
   • Locate the defaultConfig section and update the minSdkVersion to 21 or higher (the current recommended minimum for Firebase):

     android {
         compileSdkVersion 33 // Or the latest version
         defaultConfig {
             applicationId "com.example.yourapp"
             minSdkVersion 21 // Set to 21 or higher
             targetSdkVersion 33 // Or the latest version
             versionCode 1
             versionName "1.0"
         }
     }
     

2. Check Dependencies:
   • Ensure all your dependencies support the updated SDK version. If any older dependencies are incompatible, update them in your pubspec.yaml.
3. Update compileSdkVersion:
   • Ensure the compileSdkVersion is set to 33 or the latest available SDK version to avoid compatibility issues.
4. Sync Gradle Files:
   • After making these changes, sync the Gradle files in your Android project.
   • You can do this in Android Studio by clicking on File > Sync Project with Gradle Files or running the following command:

     flutter clean
     flutter pub get
     

5. Rebuild the Project:
   • Rebuild the project using flutter run or via Android Studio.

---

Note:

If you are using other Firebase plugins (e.g., firebase_core), ensure they are also updated to the latest version in your pubspec.yaml. Run this command to upgrade all dependencies:

flutter pub upgrade

---

Example Full android/app/build.gradle:

android {
    compileSdkVersion 33

    defaultConfig {
        applicationId "com.example.yourapp"
        minSdkVersion 21
        targetSdkVersion 33
        versionCode 1
        versionName "1.0"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

---

If the Issue Persists:

1. Check for Firebase Dependencies Conflicts:
   • Ensure that all Firebase-related dependencies (e.g., firebase_auth, firebase_core) are compatible with your current Flutter version and SDK.
2. Upgrade Your Flutter Project:
   • Run the following command to ensure you're using the latest Flutter version:

     flutter upgrade
     

By following these steps, you should resolve the error and be able to use firebase_auth in your Flutter app.