如何Android项目变成两个独立的项目，将build.gradle文件中applicationId中名字更换

android {
signingConfigs {
config {
keyAlias 'nengjian'
keyPassword 'nengjian'
storeFile file('E:/nengjian.key')
storePassword 'nengjian'
}
}
compileSdkVersion 23
buildToolsVersion "23.0.1"
defaultConfig {
applicationId "com.android.nengjian"
minSdkVersion 14
targetSdkVersion 23
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_7
targetCompatibility JavaVersion.VERSION_1_7
}
signingConfig signingConfigs.config
}