如何使用Gradle更改Android风味应用程序的包名称？

Question

I am currently migrating a very old Android app from Eclipse to Android Studio.

In the old version of my app, I was able to create some "flavors" with an Ant script. The aim of this script was to do a copy of the Eclipse project with a different package name and with different resources (drawable, etc.)

I have migrated the project to Android Studio, deleted the Ant script and created some flavors.

But now, I have some issues to deserialize - in the new version of the app - an object serialized in the old version of the app.

Here a part of the stackstrace : Caused by: java.lang.ClassNotFoundException: com.company.app.flavor.bo.Player

In the old version, each flavors had it own package name :

• com.company.app
• com.company.app.flavor

In this new version, the code structure is com.company.app.flavor and I play with Gradle in order to generate the good applicationId for the flavor.

So, the applicationId for the flavor is correct, but the package name of the class seems to respect the project structure so, I cannot deserialize the original object with the package com.company.app.flavor.bo.Player into the object com.company.app.bo.Player .

If I change the structure of the project with com.company.app.flavor it will work for the flavor but not for the original one with the applicationId com.company.app .

So, is there a way, with Gradle or maybe another tool (proguard ?) to change the applicationId AND the package name for a flavor ?

Thank you in advance for your help.

Answer 1

Yes you can have ProductFlavor in gradle and this supposed to change the package name of the app. If you didn't hardcoded the classpath then serialization also should work without any issues.

      android {
          .
          .
          .
     defaultConfig {
            applicationId "lib4.com.stackoverflow"
        }

         productFlavors {
                staging {
                   applicationIdSuffix ".staging"
                }

                preProduction {

                    applicationIdSuffix ".preProduction"

                }
        }
  }

Once the apk got created, you can verify whether the package name has been changed or not by dragging and dropping apk on android studio and open Android Manifest. You will see the updated package name in the manifest in apk. But in source code, you will still see the package you provided earlier.