flutter create project name com.xxx.xxx

https://stackoverflow.com/questions/51534616/how-to-change-package-name-in-flutter
https://medium.com/@skyblazar.cc/how-to-change-the-package-name-of-your-flutter-app-4529e6e6e6fc



EDITED : 27-Dec-18

for package name just change in build build.gradle only

defaultConfig {
    applicationId "your.package.name"
    minSdkVersion 16
    targetSdkVersion 27
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

flutter create --org com.yourdomain appname