错误:来自jar文件的Lambda需要在类路径上编译其接口，未知接口为java.util.function.Function [英] Error:Lambda coming from jar file need their interfaces on the classpath to be compiled, unknown interfaces are java.util.function.Function

问题描述

我正在编写android项目.一些外部库需要使用Java8.但是，当我使用Jack添加Java8时，项目无法识别Java8的组件.可能是什么问题?

I am writing android project. Some of the external libraries requires the use of Java8. However, when I add Java8 using Jack, the project isn't recognizing the components of Java8. What might be the problem?

apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
    applicationId "com.infiniteloop.android.translateyandex"
    minSdkVersion 19
    targetSdkVersion 25
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    multiDexEnabled true
    jackOptions {
        enabled true
    }
}
dexOptions {
    incremental true
}
packagingOptions {
    exclude 'META-INF/DEPENDENCIES.txt'
    exclude 'META-INF/LICENSE.txt'
    exclude 'META-INF/NOTICE.txt'
    exclude 'META-INF/NOTICE'
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/DEPENDENCIES'
    exclude 'META-INF/notice.txt'
    exclude 'META-INF/license.txt'
    exclude 'META-INF/dependencies.txt'
    exclude 'META-INF/LGPL2.1'
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}


buildscript {
tasks.withType(JavaCompile) {

 }
}


 configurations.all {
   resolutionStrategy.force 'com.google.code.findbugs:jsr305:3.0.1'
 }
repositories {
  maven {
     url "https://jitpack.io"
  }
}
 dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-
    core:2.2.2', {
       exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:25.2.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.android.support:design:25.2.0'
    compile 'com.github.vbauer:yandex-translate-api:1.2.5'
    testCompile 'junit:junit:4.12'
  }

这是错误列表 错误列表

推荐答案

您可以使用此 gradle插件，用于在Java 6、7和android中获得Java lambda支持

You can use this gradle plugin for getting java lambda support in java 6, 7 and android

只需添加:apply plugin: 'me.tatarka.retrolambda' 您的应用程序级别build.gradle文件中的以下行:apply plugin: 'com.android.application'

Just add: apply plugin: 'me.tatarka.retrolambda' line in your app level build.gradle file below the line: apply plugin: 'com.android.application'

现在在您的项目级别build.gradle中添加:

Now in your project level build.gradle add :

classpath 'me.tatarka:gradle-retrolambda:3.6.0'

在您的依赖项部分

EG:

dependencies {
    classpath 'com.android.tools.build:gradle:2.3.0'
    classpath 'me.tatarka:gradle-retrolambda:3.6.0'
}

并同步它:)

这篇关于错误:来自jar文件的Lambda需要在类路径上编译其接口，未知接口为java.util.function.Function的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！