评估项目 tflite 时出现问题

Question

我尝试使用 tflite 包创建一个活体物体检测应用程序，但似乎在我安装了这两个包：tflite，并编写了检测代码后，它似乎没有运行。

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':tflite'.
> Could not create an instance of type com.android.build.api.variant.impl.LibraryVariantBuilderImpl.
   > Namespace not specified. Specify a namespace in the module's build file. See https://d.android.com/r/tools/upgrade-assistant/set-namespace for information about setting the namespace.

     If you've specified the package attribute in the source AndroidManifest.xml, you can use the AGP Upgrade Assistant to migrate to the namespace value in the build file. Refer to https://d.android.com/r/tools/upgrade-assistant/agp-upgrade-assistant for general information about using the AGP Upgrade Assistant.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

---

android/app/build.gradle

---

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

android {
    namespace "com.example.application" 
    compileSdk = flutter.compileSdkVersion
    ndkVersion = flutter.ndkVersion

    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = JavaVersion.VERSION_1_8
    }

    defaultConfig {
       applicationId = "com.example.myapp"
        minSdk = flutter.minSdkVersion
        targetSdk = flutter.targetSdkVersion
        versionCode = flutter.versionCode
        versionName = flutter.versionName
    }

    buildTypes {
        release {
            signingConfig = signingConfigs.debug
        }
    }
}

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

---

android/settings.gradle

---

pluginManagement {
    def flutterSdkPath = {
        def properties = new Properties()
        file("local.properties").withInputStream { properties.load(it) }
        def flutterSdkPath = properties.getProperty("flutter.sdk")
        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
        return flutterSdkPath
    }()

    includeBuild("$flutterSdkPath/packages/flutter_tools/gradle")

    repositories {
        google()
        mavenCentral()
        gradlePluginPortal()
    }
}

plugins {
    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
    id "com.android.application" version "8.1.0" apply false
    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
}

include ":app"

---

pubspec.yaml

---

cupertino_icons: ^1.0.8
  flutter_svg: ^2.0.10+1
  image_picker: ^1.1.2
  camera: ^0.11.0+2
  tflite: ^1.1.2

---

~flite-1.1.2 ndroid uild.gradle:

---

group 'sq.flutter.tflite'
version '1.0-SNAPSHOT'

buildscript {
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.6.3'
    }
}

rootProject.allprojects {
    repositories {
        google()
        jcenter()
    }
}

apply plugin: 'com.android.library'

android {
    compileSdkVersion 28

    defaultConfig {
        minSdkVersion 19
        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
    }
    lintOptions {
        disable 'InvalidPackage'
    }

    dependencies {
        implementation 'org.tensorflow:tensorflow-lite:+'
        implementation 'org.tensorflow:tensorflow-lite-gpu:+'
    }
}

Answer 1

出现这个问题是因为库已经3年没有更新了。 要解决此问题，您可以尝试提到的链接https://github.com/shaqian/flutter_tflite/pull/305。 如果没有解决，请查看 Git 中心存储库和 PR 部分，因为有贡献者，这将非常有帮助。

Answer 2

该问题是由于您的项目中使用的 Android Gradle Plugin (AGP) 版本与 tflite 包不匹配导致的。 tflite 包使用的是过时的 AGP 版本 (3.6.3)，而您的应用程序使用的是更新的版本 (8.1.0)。

更新您的 pubspec.yaml

  cupertino_icons: ^1.0.8
  flutter_svg: ^2.0.10+1
  image_picker: ^1.1.2
  camera: ^0.11.0+2
  tflite:
    git:
      url: https://github.com/tech-ramakant/flutter_tflite.git
      ref: Namespace_not_specified_fix

更新应用程序的 build.gradle -> 从 minSdkVersion 15 到 minSdkVersion 19，然后按照以下命令操作

flutter clean
flutter pub get
flutter run