android錯誤：Error converting bytecode to dex:

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.
...while parsing org/tensorflow/DataType.class


修改buidle.gradle版本

buildscript {
    repositories {
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
    }
}

android {
    compileSdkVersion 26    buildToolsVersion "26.0.1"

}