Flutter集成tflite_flutter_helper_plus报错：找不到libtask_text_jni.so

环境依赖 #

用户使用的Flutter依赖配置：

dependencies:
  flutter:
    sdk: flutter

  tflite_flutter: ^0.10.4
  tflite_flutter_helper_plus: ^0.0.2

实现代码 #

用户的Bert问答功能实现：

import 'package:flutter/material.dart';
import 'package:tflite_flutter_helper_plus/tflite_flutter_helper_plus.dart';


void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});


  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: TextButton(
          onPressed: () { getAnswer();},
          child: Text('click me to get answer'),
        ),
      )
    );
  }


  void getAnswer() async {
    String question = "What is the capital of Brazil?";
    String context = "Brazil is a country in South America. It is the largest country in South America and the fifth largest country in the world. The capital of Brazil is Brasília.";
    final bertQuestionAnswerer = await BertQuestionAnswerer.createFromAsset('assets/bert_qa.tflite');
    List<QaAnswer> answeres = bertQuestionAnswerer.answer(context, question);
    print(answeres);
   }
}

错误日志 #

运行时抛出的异常：

E/flutter (12951): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Invalid argument(s): Failed to load dynamic library 'libtask_text_jni.so': dlopen failed: library "libtask_text_jni.so" not found
E/flutter (12951): #0      _open (dart:ffi-patch/ffi_dynamic_library_patch.dart:11:43)
E/flutter (12951): #1      new DynamicLibrary.open (dart:ffi-patch/ffi_dynamic_library_patch.dart:22:12)
E/flutter (12951): #2      tflitelib.<anonymous closure> (package:tflite_flutter_helper_plus/src/task/bindings/dlib.dart:32:27)
E/flutter (12951): #3      tflitelib (package:tflite_flutter_helper_plus/src/task/bindings/dlib.dart:40:2)
E/flutter (12951): #4      tflitelib (package:tflite_flutter_helper_plus/src/task/bindings/dlib.dart)
E/flutter (12951): #5      BertQuestionAnswererFromFile (package:tflite_flutter_helper_plus/src/task/bindings/text/qa/bert_qa.dart:13:32)
E/flutter (12951): #6      BertQuestionAnswererFromFile (package:tflite_flutter_helper_plus/src/task/bindings/text/qa/bert_qa.dart)
E/flutter (12951): #7      BertQuestionAnswerer.create (package:tflite_flutter_helper_plus/src/task/text/qa/bert_question_answerer.dart:42:23)
E/flutter (12951): #8      BertQuestionAnswerer.createFromAsset (package:tflite_flutter_helper_plus/src/task/text/qa/bert_question_answerer.dart:78:12)
E/flutter (12951): <asynchronous suspension>
E/flutter (12951): #9      _MyHomePageState.getAnswer (package:bert_qa_teste/main.dart:56:34)
E/flutter (12951): <asynchronous suspension>
E/flutter (12951): 

原因分析 #

该错误是因为tflite_flutter_helper_plus 0.0.2版本存在打包缺陷，未正确包含Android平台所需的libtask_text_jni.so动态链接库；同时旧版本的tflite_flutter（0.10.4）与该helper库的兼容性不足，导致运行时无法找到依赖的JNI库。

解决方案 #

1. 升级依赖版本
   将依赖更新为兼容的最新稳定版本，修改pubspec.yaml：

   dependencies:
     flutter:
       sdk: flutter
   
     tflite_flutter: ^0.14.0
     tflite_flutter_helper_plus: ^0.2.0
   

   （注：版本号以官方最新发布为准，确保两者版本兼容）

2. 清理缓存并重建项目
   执行以下命令清理缓存并重新获取依赖：

   flutter clean
   flutter pub get
   flutter run
   

3. 检查模拟器ABI架构
   确保Android模拟器使用的是x86_64或arm64-v8a架构，部分旧版本库对x86架构支持不佳。可以通过Android Studio创建新的模拟器时选择对应架构。

4. 手动添加JNI库（备选方案）
   如果上述方法无效，可手动下载TensorFlow Lite Task Library的Android预编译库，提取对应ABI的libtask_text_jni.so文件，放置到项目的android/app/src/main/jniLibs/[abi]/目录下（例如arm64-v8a、x86_64），然后重新构建项目。

内容的提问来源于stack exchange，提问作者Willer Silva de Morais