Error map
minSdkVersion cannot be smaller than the library's Android Gradle: uses-sdk:minSdkVersion 16 cannot be smaller than version 21 declared in library [:firebase_auth]
Flutter / Dart · layer 1, On your device
Centre: this error. First ring: errors it is linked with (7). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (7)
Flutter: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null, null)
Google Sign-In failed on Android because the app's SHA-1 fingerprint or package name is not registered for the OAuth client.
Android Gradle: Execution failed — Unsupported class file major version 65 / Android Gradle plugin requires Java 17 to run
Gradle or the Android Gradle plugin is running on a Java version it does not support.
Flutter (Android): java.io.IOException: Cleartext HTTP traffic to api.example.com not permitted
Android 9+ blocks plain `http://` requests by default; the app must use HTTPS or explicitly allow cleartext for that host.
Android Gradle: Execution failed for task ':app:checkDebugAarMetadata'. Dependency requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs
A dependency was built against a newer Android API than your project's `compileSdk`.
Flutter: Exception: Gradle task assembleDebug failed with exit code 1
`flutter run` / `flutter build apk` stopped because the Gradle build failed; the real cause is printed above this line.
flutter doctor: Android license status unknown. Run `flutter doctor --android-licenses` to accept the SDK licenses
The Android SDK licenses have not been accepted, so builds cannot download or use SDK components.
flutter doctor: Android SDK is missing command-line tools; download from https://goo.gl/XxQghQ — cmdline-tools component is missing
The Android SDK Command-line Tools package is not installed, so Flutter cannot run `sdkmanager` or accept licenses.
Two steps away (21)
Google Cloud: Error: Could not load the default credentials. Browse to https://cloud.google.com/docs/authentication/getting-started
The Google client library found no Application Default Credentials (ADC) on this machine or environment.
Flutter: MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences)
Dart called a plugin's native method but the native side is not registered, usually because the app was not fully rebuilt after a…
Flutter: [core/no-app] No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp()
A Firebase service was used before `Firebase.initializeApp()` ran and completed.
Gradle: Could not resolve all files for configuration / Could not resolve dependency
Gradle couldn’t download a dependency — wrong coordinates/version, missing repository, offline mode, or network/proxy issues.
Manifest merger failed: android:exported needs to be explicitly specified
Targeting Android 12 (API 31)+ requires `android:exported` on every activity, service or receiver that has an intent-filter.
Duplicate class X found in modules A and B
Two dependencies ship the same class — typically old Android Support libraries mixed with AndroidX, or Kotlin stdlib-jdk7/jdk8 ve…
android.os.NetworkOnMainThreadException
The app made a network call on the main (UI) thread, which Android forbids.
Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline."
URLSession couldn’t reach the network — the device is offline, the app’s cellular data is disabled, or the simulator lost network…
Error Domain=NSURLErrorDomain Code=-1001 "The request timed out."
The server didn’t respond within URLSession’s timeout (60 s default) — slow server, unreachable host on this network, or a stalle…
Gradle: Unsupported class file major version / Android Gradle plugin requires Java 17 to run
The JDK running Gradle doesn’t match what the Gradle version or Android Gradle Plugin (AGP) supports.
SDK location not found. Define a valid SDK location with an ANDROID_HOME environment variable or by setting the sdk.dir path in local.properties
Gradle doesn’t know where the Android SDK is installed.
Failed to find target with hash string 'android-34' / Failed to install the following Android SDK packages as some licences have not been accepted
Gradle needs an SDK platform/build-tools that isn’t installed, or the licences haven’t been accepted on this machine.
Minimum supported Gradle version is 8.7. Current version is 8.2
The Android Gradle Plugin (AGP) version in your build needs a newer Gradle wrapper version.
Namespace not specified. Specify a namespace in the module's build file (AGP 8)
AGP 8 requires android { namespace = "…" } in each module’s build file; the package attribute in AndroidManifest.xml is no longer…
Dependency 'androidx.x:1.y' requires libraries and applications that depend on it to compile against version 34 or later of the Android APIs
A library needs a higher compileSdk than your module uses (checkAarMetadata task).
adb server version (41) doesn't match this client (39); killing...
Two different adb binaries are running — e.g. Android Studio’s SDK adb and another one on PATH (Homebrew, Genymotion, older SDK).
IllegalStateException: Default FirebaseApp is not initialized in this process
Firebase couldn’t initialise because google-services.json or the Google Services Gradle plugin is missing/misapplied, or initiali…
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun
The Xcode Command Line Tools are missing or broken — typical right after a macOS update.
Flutter: BoxConstraints forces an infinite width. These invalid constraints were provided to RenderStack's layout() function (TextField in a Row)
A widget that needs a finite width, like a `TextField` or `Container` with no size, was placed where the parent offers unlimited…
Dart pub: The current Dart SDK version is 2.19.0. Because app requires SDK version >=3.0.0 <4.0.0, version solving failed
A package (or your own pubspec) requires a newer Dart SDK than the one your Flutter installation provides.
flutter run: No connected devices found; check 'flutter doctor'. Expected at least one device
Flutter cannot see any emulator, simulator, browser or phone to run on.
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