java - 无静态方法元工厂(OptaPlanner)

Question

最近，我将 OptaPlanner 依赖项添加到我的 build.gradle 中，以便使用库的车辆路由问题。当我尝试使用求解器时，收到以下错误

java.lang.NoSuchMethodError: No static method metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite; in class Ljava/lang/invoke/LambdaMetafactory; or its super classes (declaration of 'java.lang.invoke.LambdaMetafactory' appears in /apex/com.android.art/javalib/core-oj.jar)

我谷歌了一下，发现我需要启用 JDK 1.8，就像我在 build.gradle 中所做的那样，但它似乎仍然没有消失。我还附上了 build.gradle 文件。有什么建议 ？ (我使用的是Android-Studio)

apply plugin: 'com.android.application'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"
    defaultConfig {
        applicationId "com.example.groceryrouter"
        minSdkVersion 26
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

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


    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/kie.conf'
        exclude 'META-INF/ErraiApp.properties'
    }

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation group: 'com.jtransc', name: 'jtransc-rt', version: '0.6.8'
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation "androidx.cardview:cardview:1.0.0"
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'com.google.android.material:material:1.1.0'
    implementation 'androidx.navigation:navigation-fragment:2.2.1'
    implementation 'androidx.navigation:navigation-ui:2.2.1'
    testImplementation 'junit:junit:4.13'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    implementation 'com.google.android.gms:play-services-maps:17.0.0'
    implementation 'com.google.gms:google-services:4.3.3'
    implementation 'com.google.android.gms:play-services-auth:18.0.0'
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'com.google.android.gms:play-services-location:17.0.0'
    implementation 'androidx.recyclerview:recyclerview:1.2.0-alpha02'
    implementation 'com.google.android.libraries.places:places:2.2.0'
    // https://mvnrepository.com/artifact/commons-io/commons-io
    implementation group: 'commons-io', name: 'commons-io', version: '20030203.000550'
    implementation('org.optaplanner:optaplanner-core:7.36.0.20200331') {
        exclude group: 'xmlpull'
        exclude group: 'org.drools'
        // todo exclude, didn't work on optaplanner 6.1.0
        //exclude group: 'org.kie'
    }
    // Required -- JUnit 4 framework
    testImplementation 'junit:junit:4.12'
    // Optional -- Robolectric environment
    testImplementation 'androidx.test:core:1.0.0'
    // Optional -- Mockito framework
    testImplementation 'org.mockito:mockito-core:1.10.19'
    implementation "org.slf4j:slf4j-simple:1.7.9"
}

Answer 1

我假设您正在使用 getter 注释。请改用字段注释。

这是我们使用 MethodHandles 而不是反射来调用 getter 的改进，它们速度更快，但在 Android 和 Graal 上存在兼容性问题。