Android Studio - Change applicationId in build.gradle file

Question

How can I change the applicationId field of my build.gradle file?

defaultConfig {
    applicationId "com.oldname.appname"
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}

I've already renamed the package structure to com.newname.appname and all the imports and things like that have updated, but applicationId hasn't. I can't refactor it and just trying to type in a new name brings up a ton of errors where Android Studio will tell me my main FragmantActivity "is not applicable to android.app.Activity" and so on.

Any idea what to do? Thanks in advance.

Answer 1

You can create different flavours for one application in Gradle file. This will increase the code reusability.

An example for an application with Paid and Free flavors:

productFlavors {

    paid {
        applicationId "com.oldname.appname.paid"
    }

    free {
        applicationId "com.oldname.appname.free"
    }

}

So these two flavours will act as two products. You can upload it to play store as different applications.

You can also get four build variant for this two flavours.

com.oldname.appname.free- debug

com.oldname.appname.free- release

com.oldname.appname.paid- debug

com.oldname.appname.paid- release