Hey, Error:Error converting bytecode to dex: Cau...

# android

[dzakens]

Hey,

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.

without any submodules AS 2.3.3 kotlin 1.1.3

android {
compileSdkVersion 25
buildToolsVersion "25.0.3"
defaultConfig {
...
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}

compileOptions {
sourceCompatibility JavaVersion.VERSION_1_7
targetCompatibility JavaVersion.VERSION_1_7
}

sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
}