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
    }