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我刚刚切换到Android Studio 2.1,当尝试编译之前正在运行的应用程序时出现此错误:

Error:Error converting bytecode to dex:
Cause: Dex cannot parse version 52 byte code.
This is caused by library dependencies that have been compiled using Java 8 or above.
If you are using the 'java' gradle plugin in a library submodule add 
targetCompatibility = '1.7'
sourceCompatibility = '1.7'
to that submodule's build.gradle file.

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我已经更新了主项目的gradle.build文件以强制生成Java 1.7代码:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'
        apply plugin: 'java'
        sourceCompatibility = 1.7
        targetCompatibility = 1.7
    }
}

我还更新了gradle.build模块,如下所示设置java版本:

android …

我无法在调试和发布模式下使用 minifyEnabled true 运行 apk。我参考了下面的链接，但没有一个对我有用。

1. Android-错误：执行失败的任务“：应用程序：transformClassesWithDexForRelease”

2.将字节码转换为 dex 时出错：原因：java.lang.RuntimeException: Exception parsing classes - Android studio 2.0 beta 6

下面是应用程序 build.gradle 文件

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"
    defaultConfig {
        applicationId 'XX.XX.XXX'
        minSdkVersion 21
        targetSdkVersion 23
        versionCode 9
        versionName "1.0"
        multiDexEnabled true
        vectorDrawables.useSupportLibrary = true



    }



    sourceSets.main {
        jni.srcDirs = [] //disable automatic ndk-build call
        jniLibs.srcDir 'src/main/libs' //integrate your libs from libs instead of jniLibs
    }
    dexOptions {
        javaMaxHeapSize "4g" //specify the heap size for the …