project中build.gradel配置
 ```maven{ url 'https://maven.aliyun.com/repository/google'}
    maven{ url 'https://maven.aliyun.com/repository/gradle-plugin'}
    maven{ url 'https://maven.aliyun.com/repository/public'}
    maven{ url 'https://maven.aliyun.com/repository/jcenter'} 
    jcenter(){ url 'http://jcenter.bintray.com/'}

model中build.gradle配置
支持

plugins {
id ‘com.android.application’
id ‘kotlin-android’
id ‘kotlin-android-extensions’ //支持LiveData、ViewModel
}

//支持双向数据绑定
buildFeatures {
dataBinding = true
}