java.lang.NoSuchMethodError: No static method boundingRect(Lorg/opencv/core/Mat;)

Question

我有一些 Android 代码需要找到轮廓并用矩形勾勒出轮廓。我对 OpenCV 初始化没有任何问题（所有其他功能都可以正常工作）。但是当我 运行 Imgproc.boundingRect(contours.get(i)); 错误 java.lang.NoSuchMethodError 发生。

2021-09-03 18:24:24.331 23081-23081/? E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.fern.mangoeye, PID: 23081
    java.lang.NoSuchMethodError: No static method boundingRect(Lorg/opencv/core/Mat;)Lorg/opencv/core/Rect; in class Lorg/opencv/imgproc/Imgproc; or its super classes (declaration of 'org.opencv.imgproc.Imgproc' appears in /data/app/com.fern.mangoeye-jmLx1kABmB7GFFie5xaCyA==/base.apk!classes9.dex)
        at com.fern.mangoeye.OpenCVHandler.feedNewYUVData(OpenCVHandler.java:132)
        at com.fern.mangoeye.CameraView.onPreviewFrame(CameraView.java:140)
        at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1221)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:237)
        at android.app.ActivityThread.main(ActivityThread.java:8167)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:496)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1100)

OpenCV初始化有OpenCVLoader.initDebug()以及BaseLoaderCallback

OpenCV SDK 版本：3.4.1 compileSdk: 31

Answer 1

我通过在 build.gradle 中为 implementation (group: 'org.bytedeco', name: 'javacv', version: '1.5.5') 指定 exclude group: 'org.bytedeco', module: 'opencv' 解决了我的问题。 所以现在我的依赖项看起来像这样：

dependencies {

    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'com.google.android.material:material:1.3.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
    implementation project(path: ':opencv')

    implementation 'org.jcodec:jcodec:0.2.5'
    
    implementation (group: 'org.bytedeco', name: 'javacv', version: '1.5.5'){
        exclude group: 'org.bytedeco', module: 'opencv'
    }

    implementation group: 'org.bytedeco', name: 'openblas', version: '0.3.13-1.5.5', classifier: 'android-arm'
    implementation group: 'org.bytedeco', name: 'openblas', version: '0.3.13-1.5.5', classifier: 'android-arm64'
    implementation group: 'org.bytedeco', name: 'openblas', version: '0.3.13-1.5.5', classifier: 'android-x86_64'
    implementation group: 'org.bytedeco', name: 'openblas', version: '0.3.13-1.5.5', classifier: 'android-x86'

    implementation group: 'org.bytedeco', name: 'ffmpeg', version: '4.3.2-1.5.5', classifier: 'android-arm'
    implementation group: 'org.bytedeco', name: 'ffmpeg', version: '4.3.2-1.5.5', classifier: 'android-arm64'
    implementation group: 'org.bytedeco', name: 'ffmpeg', version: '4.3.2-1.5.5', classifier: 'android-x86_64'
    implementation group: 'org.bytedeco', name: 'ffmpeg', version: '4.3.2-1.5.5', classifier: 'android-x86'
}

我还创建了 jni 文件夹并将文件夹从 sdk\native\libs 复制到其中。所以，问题出在 OpenCV

的初始化上