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我正在尝试使用MethodChannel 在 Flutter 中使用bytedeco tesseract java 包装器，但是我遇到了错误。我已经尝试过 flutter clean 并将 gradle 升级到 4.2.2 但仍然无法正常工作。我的怀疑是正确安装依赖项

我通过 Maven 添加的依赖项如下：

android/app/build.gradle

dependencies {
    implementation 'org.bytedeco:javacpp:1.5.6'
    implementation 'org.bytedeco:javacpp-presets:1.5.6'

    implementation 'org.bytedeco:leptonica:1.81.1-1.5.6'

    implementation 'org.bytedeco:tesseract:4.1.1-1.5.6'
}

android/app/src/main/java/com/example/ocr_app_test_v2/MainActivity.java

package com.example.ocr_app_test_v2;

import io.flutter.embedding.android.FlutterActivity;
import androidx.annotation.NonNull;


import io.flutter.embedding.engine.FlutterEngine;
import io.flutter.plugin.common.MethodChannel;

import org.bytedeco.javacpp.*;
import org.bytedeco.leptonica.*;
import org.bytedeco.tesseract.*;
import static org.bytedeco.leptonica.global.lept.*;
import static org.bytedeco.tesseract.global.tesseract.*;

public class MainActivity extends FlutterActivity {

    private static final String CHANNEL = "samples.flutter.dev/ocr";

    @Override
    public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
        super.configureFlutterEngine(flutterEngine);
        new MethodChannel(flutterEngine.getDartExecutor().getBinaryMessenger(), CHANNEL)
                .setMethodCallHandler(
                        (call, result) -> {
                            // Note: this method is invoked on the main thread.
                            // Note: this method is invoked on the main thread.
                            if (call.method.equals("getOCR_result")) {
                                String batteryLevel = getOCR_result();

                                result.success(batteryLevel);
                            } else {
                                result.notImplemented();
                            }
                        }
                );
    }





    public String getOCR_result() {
        BytePointer outText;

        TessBaseAPI api = new TessBaseAPI();
        // Initialize tesseract-ocr with English, without specifying tessdata path
        if (api.Init(null, "eng") != 0) {
            System.err.println("Could not initialize tesseract.");
            System.exit(1);
        }

        // Open input image with leptonica library
        PIX image = pixRead("/Users/nameHere/AndroidStudioProjects/ocr_app_test_v2/src_ocr/test_pic.png");
        api.SetImage(image);
        // Get OCR result
        outText = api.GetUTF8Text();
        System.out.println("OCR output:\n" + outText.getString());

        // Destroy used object and release memory
        //api.End();
        ///outText.deallocate();
        //pixDestroy(image);


        return outText.getString();
    }
}

我实现的飞镖方法：

import 'dart:async';

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

Future<String> getOCR_result_dart() async {
  const platform = MethodChannel('samples.flutter.dev/ocr');

  try {
    final String result = await platform.invokeMethod('getOCR_result');
    print('resutls are here: ' + result);
    return result;
  } on PlatformException catch (e) {
    return "ocr error";
  }
}

我得到的错误：

W/System.err( 1283): Warning: Version of org.bytedeco:leptonica could not be found.
E/AndroidRuntime( 1283): FATAL EXCEPTION: main
E/AndroidRuntime( 1283): Process: com.example.ocr_app_test_v2, PID: 1283
E/AndroidRuntime( 1283): java.lang.UnsatisfiedLinkError: dlopen failed: library "libjnilept.so" not found
E/AndroidRuntime( 1283):    at java.lang.Runtime.loadLibrary0(Runtime.java:1087)
E/AndroidRuntime( 1283):    at java.lang.Runtime.loadLibrary0(Runtime.java:1008)
E/AndroidRuntime( 1283):    at java.lang.System.loadLibrary(System.java:1664)
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:1738)
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.load(Loader.java:1345)
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.load(Loader.java:1157)
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.load(Loader.java:1133)
E/AndroidRuntime( 1283):    at org.bytedeco.leptonica.global.lept.<clinit>(lept.java:14)
E/AndroidRuntime( 1283):    at java.lang.Class.classForName(Native Method)
E/AndroidRuntime( 1283):    at java.lang.Class.forName(Class.java:454)
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.load(Loader.java:1212)
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.load(Loader.java:1157)
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.load(Loader.java:1133)
E/AndroidRuntime( 1283):    at org.bytedeco.tesseract.TessBaseAPI.<clinit>(TessBaseAPI.java:26)
E/AndroidRuntime( 1283):    at com.example.ocr_app_test_v2.MainActivity.getOCR_result(MainActivity.java:52)
E/AndroidRuntime( 1283):    at com.example.ocr_app_test_v2.MainActivity.lambda$configureFlutterEngine$0$MainActivity(MainActivity.java:35)
E/AndroidRuntime( 1283):    at com.example.ocr_app_test_v2.-$$Lambda$MainActivity$j1X8cjOgJ0mnzzaqcNKQtS4D12U.onMethodCall(Unknown Source:2)
E/AndroidRuntime( 1283):    at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/AndroidRuntime( 1283):    at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:84)
E/AndroidRuntime( 1283):    at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:865)
E/AndroidRuntime( 1283):    at android.os.MessageQueue.nativePollOnce(Native Method)
E/AndroidRuntime( 1283):    at android.os.MessageQueue.next(MessageQueue.java:335)
E/AndroidRuntime( 1283):    at android.os.Looper.loop(Looper.java:206)
E/AndroidRuntime( 1283):    at android.app.ActivityThread.main(ActivityThread.java:8595)
E/AndroidRuntime( 1283):    at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime( 1283):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
E/AndroidRuntime( 1283):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
E/AndroidRuntime( 1283): Caused by: java.lang.UnsatisfiedLinkError: Could not find jnilept in class, module, and library paths.
E/AndroidRuntime( 1283):    at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:1705)
E/AndroidRuntime( 1283):    ... 23 more
I/Process ( 1283): Sending signal. PID: 1283 SIG: 9
Lost connection to device.
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