android - 在真实设备中运行时将字节码转换为 dex 时出错

Question

我更新了 kolin 版本 1.1.4-2 然后我开始在真实设备上运行我的项目但是它显示了这个错误 ->

Module:app build.gradle 文件 我上次在依赖项中添加了 targetCompatibility，但它根本不起作用。每当我在我的设备上运行时，它都会显示上述错误->

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 26
    buildToolsVersion "26.0.1"
    defaultConfig {
        applicationId "com.company.projectname"
        minSdkVersion 17
        targetSdkVersion 26
        versionCode 2
        versionName "1.1"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

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 "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
    compile 'com.android.support:appcompat-v7:26.+'
    compile 'com.google.android.gms:play-services-ads:11.0.4'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
}

项目build.gradle文件->

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    ext.kotlin_version = '1.1.4-2'
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.3'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

apply plugin: 'kotlin'

allprojects {
    repositories {
        jcenter()
    }
}

repositories {
    mavenCentral()
}
compileKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}
compileTestKotlin {
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

请告诉我如何解决。

Answer 1

该错误清楚地告诉您将库的子模块中的 target 和 source 兼容性更改为 1.7。为什么不能改变它？

我想它可能要求你改变这个:

compileKotlin {
kotlinOptions {
    jvmTarget = "1.8"
}
}
compileTestKotlin {
kotlinOptions {
    jvmTarget = "1.8"
}
}

为此:

compileKotlin {
kotlinOptions {
    jvmTarget = "1.7"
}
}
compileTestKotlin {
kotlinOptions {
    jvmTarget = "1.7"
}
}