cannot find symbol: com.datadoghq.flutter.DatadogSdkPlugin

[xonaman]

Describe the bug

/Users/robertmainzer/Workspace/remonon_app/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java:39: error: cannot find symbol
      flutterEngine.getPlugins().add(new com.datadoghq.flutter.DatadogSdkPlugin());
                                                              ^
  symbol:   class DatadogSdkPlugin
  location: package com.datadoghq.flutter
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileReleaseJavaWithJavac'.
> Compilation failed; see the compiler output below.
  /Users/robertmainzer/Workspace/remonon_app/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java:39: error: cannot find symbol
        flutterEngine.getPlugins().add(new com.datadoghq.flutter.DatadogSdkPlugin());
                                                                ^
    symbol:   class DatadogSdkPlugin
    location: package com.datadoghq.flutter
  1 error

* Try:
> Check your code and dependencies to fix the compilation error(s)
> Run with --scan to get full insights.

BUILD FAILED in 3s
Running Gradle task 'assembleRelease'...                            3.7s
Gradle task assembleRelease failed with exit code 1

Reproduction steps

flutter build apk --release

SDK logs

none

Expected behavior

building???

Affected SDK versions

3.0.1

Latest working SDK version

2.16.1

Did you confirm if the latest SDK version fixes the bug?

No

Flutter Version

3.38.9

Setup Type

No response

Device Information

No response

Other relevant information

No response

[fuzzybinary]

Hi @xonaman ,

We have never seen this.... can you try cleaning, re-runninng flutter pub get, and then rebuilding to see if the problem persists?

If it does, we're going to need more information. Have you modified you gradle files at all from what Flutter creates automatically? The only way I could see this happening is if somehow your build is failing to properly depend on the proper Android libraries from Maven, and I'm not sure exactly why that would happen.

[xonaman]

We have never seen this.... can you try cleaning, re-runninng flutter pub get, and then rebuilding to see if the problem persists?

@fuzzybinary tried flutter clean && flutter pub get && flutter build apk --release, same result unfortunately.

If it does, we're going to need more information. Have you modified you gradle files at all from what Flutter creates automatically? The only way I could see this happening is if somehow your build is failing to properly depend on the proper Android libraries from Maven, and I'm not sure exactly why that would happen.

android/build.gradle.kts:

allprojects {
    repositories {
        google()
        mavenCentral()
        flatDir {
            dirs("libs")
        }
    }
}

val newBuildDir: Directory = rootProject.layout.buildDirectory.dir("../../build").get()
rootProject.layout.buildDirectory.value(newBuildDir)

subprojects {
    val newSubprojectBuildDir: Directory = newBuildDir.dir(project.name)
    project.layout.buildDirectory.value(newSubprojectBuildDir)
}
subprojects {
    project.evaluationDependsOn(":app")
}

tasks.register<Delete>("clean") {
    delete(rootProject.layout.buildDirectory)
}

android/app/build.gradle.kts:

import org.jetbrains.kotlin.gradle.dsl.JvmTarget
import java.util.Properties
import java.io.ByteArrayOutputStream

plugins {
  id("com.android.application")
  // START: FlutterFire Configuration
  id("com.google.gms.google-services")
  id("com.google.firebase.firebase-perf")
  id("com.google.firebase.crashlytics")
  // END: FlutterFire Configuration
  id("kotlin-android")
  id("org.jetbrains.kotlin.plugin.serialization")
  // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
  id("dev.flutter.flutter-gradle-plugin")
}

val keystoreProperties = Properties()

val keystorePropertiesFile = rootProject.file("key.properties")
if (keystorePropertiesFile.exists()) {
  keystoreProperties.load(keystorePropertiesFile.inputStream())

  if (keystoreProperties["keyAlias"] == null) {
    throw GradleException("No keyAlias found. Please check your key.properties file.")
  }

  if (keystoreProperties["keyPassword"] == null) {
    throw GradleException("No keyPassword found. Please check your key.properties file.")
  }

  if (keystoreProperties["storeFile"] == null) {
    throw GradleException("No storeFile found. Please check your key.properties file.")
  } else {
    val storeFile = keystoreProperties["storeFile"]
    if (storeFile is String) {
      val file = rootProject.file(storeFile)
      if (!file.exists()) {
        throw GradleException("The keystore file '$storeFile' was not found. Please check your key.properties file.")
      }
    } else {
      throw GradleException("The storeFile property is not a valid string. Please check your key.properties file.")
    }
  }

  if (keystoreProperties["storePassword"] == null) {
    throw GradleException("No storePassword found. Please check your key.properties file.")
  }
} else {
  println("No key.properties file found. App will be signed with debug keys.")
}

android {
  namespace = "com.remonon.remonon"
  compileSdk = flutter.compileSdkVersion
  ndkVersion = flutter.ndkVersion

  // Include native Android assets (Flutter build doesn't include these by default)
  sourceSets {
    getByName("main") {
      assets.srcDirs("src/main/assets")
    }
  }

  // Prevent compression of .onnx and .tflite files (required for assets.openFd() to work)
  androidResources {
    noCompress += "onnx"
    noCompress += "tflite"
  }

  dependenciesInfo {
    includeInBundle = false
    includeInApk = false
  }

  buildFeatures {
    viewBinding = true
    buildConfig = true
  }

  compileOptions {
    isCoreLibraryDesugaringEnabled = true
    sourceCompatibility = JavaVersion.VERSION_11
    targetCompatibility = JavaVersion.VERSION_11
  }

  kotlin {
    compilerOptions {
      jvmTarget = JvmTarget.JVM_11
    }
  }

  defaultConfig {
    applicationId = "com.remonon.remonon"
    minSdk = flutter.minSdkVersion
    targetSdk = flutter.targetSdkVersion
    versionCode = flutter.versionCode
    versionName = flutter.versionName
    multiDexEnabled = true
    testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"

    ndk {
      abiFilters.addAll(listOf("armeabi-v7a", "arm64-v8a", "x86_64"))
    }
  }

  signingConfigs {
    create("release") {
      keyAlias = keystoreProperties["keyAlias"].let {
        if (it is String) it else null
      }
      keyPassword = keystoreProperties["keyPassword"].let {
        if (it is String) it else null
      }
      storeFile = keystoreProperties["storeFile"].let {
        if (it is String) rootProject.file(it) else null
      }
      storePassword = keystoreProperties["storePassword"].let {
        if (it is String) it else null
      }
    }
  }

  buildTypes {
    release {
      signingConfig = signingConfigs.getByName("release")
      isMinifyEnabled = true
      isShrinkResources = true
      proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
    }
  }
}

flutter {
  source = "../.."
}

dependencies {
  coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.5")
  implementation("androidx.multidex:multidex:2.0.1")

  // https://developers.google.com/ml-kit/vision/doc-scanner/android
  implementation("com.google.android.gms:play-services-mlkit-document-scanner:16.0.0")

  // required by https://pub.dev/packages/flutter_local_notifications
  implementation("androidx.window:window:1.3.0")
  implementation("androidx.window:window-java:1.3.0")

  implementation(name = "remonon_opencv", group = "remonon", version = "1.0.0", ext = "aar")

  // TensorFlow Lite Task Library for document segmentation (high-level API)
  implementation("org.tensorflow:tensorflow-lite-task-vision:0.4.4")
  implementation("org.tensorflow:tensorflow-lite-gpu-delegate-plugin:0.4.4")

  // Testing dependencies
  testImplementation("junit:junit:4.13.2")
  testImplementation("org.jetbrains.kotlin:kotlin-test")

  // Android instrumentation testing
  androidTestImplementation("androidx.test.ext:junit:1.2.1")
  androidTestImplementation("androidx.test:runner:1.6.2")
  androidTestImplementation("androidx.test:rules:1.6.1")
  androidTestImplementation("com.google.truth:truth:1.4.4")
  androidTestImplementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.3")
}

[fuzzybinary]

This is very strange. I'm going to see if I can replicate in a simple example, but could you try as well? There must be something in one of the two gradle files that's preventing proper Flutter dependency resolution.

Out of curiosity, is it only flutter build apk that fails? Does flutter run work?

[xonaman]

@fuzzybinary flutter run does work. Tried this:

flutter clean
flutter pub get
cd android && ./gradlew clean
cd ..
flutter build apk --release

But still, flutter build app --release fails.

[xonaman]

@fuzzybinary just upgraded to flutter 3.41.0, that somehow fixed it

[fuzzybinary]

Glad to hear it got fixed @xonaman -- wish I understood why that fixed it though!