I have two firebase projects one for production and another one for development. Application id for the two projects differ by single letter in the middle of the name (com.xyZ.myproject, com.xyz.myproject). I have created one new build type staging and we have by default two build type i.e debug and release.

buildTypes {
        debug{
            //this build uses firebase project which is different from production
            signingConfig signingConfigs.debug
        }
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.debug
        }
        create("staging"){
            //This build will uses production firebase project
            signingConfig signingConfigs.debug
            debuggable true
        }
    }

I have used google services plugin which allow me to have different json file (namely google-services.json) for each firebase project and build type but I have to manually change the applicationId to successfully build the project. I want to automate this thing! AGP or Google service plugin or gradle itself choose applicationId based on the build type. I have tried most of the solutions from stack-overflow and internet and yet all are in vain.

andorid {
      compileSdk 35
      defaultConfig{
      //for debug app, I change application id to com.xyZ.myproject
      //for staging/release app, I change application id to com.xyz.myproject
      applicationId "com.xyz.myprjoect"
      ...
      }
     ..
    //removed for brevity
 }

Try 1 : How to change applicationID dynamically as I don't want suffix, it didn't work.

debug {
      applicationIdSuffix '.xyZ.myproject'
    }
    staging{
applicationIdSuffix '.xyz.myproject'
}

Try 2 : Setting ApplicationID for every build variant

androidComponents.onVariants {
        // Remove the . between the base applicationId and the applicationIdSuffix that is being automatically added by gradle
        // so we can have this => com.mycompany.mainappname_fullversion instead of this => com.mycompany.mainappname._fullversion 
        it.applicationId.set(it.applicationId.get().replace("mainappname.", "mainappname"))
    }

onVariant not found error.

Try 3 : Using local properties and setting using code : first get local properties projects.findProperty("some_property")

applicationVariants.each{ variant ->
    if(variant.name.contains("debug")){
    appId = "com.xyZ.myproject"
    else
    appId = "com.xyz.myproject"

And ofcourse chatGpt

buildTypes {
        debug {
            applicationId = "com.example.debug"
            isMinifyEnabled = false
        }
        staging {
            applicationId = "com.example.staging"
            isMinifyEnabled = false
        }
        release {
            applicationId = "com.example.production"
            isMinifyEnabled = true
            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
        }
    }

to whom I had to tell that there is not property "applicationId" in the buildType.

I have two firebase projects one for production and another one for development. Application id for the two projects differ by single letter in the middle of the name (com.xyZ.myproject, com.xyz.myproject). I have created one new build type staging and we have by default two build type i.e debug and release.

buildTypes {
        debug{
            //this build uses firebase project which is different from production
            signingConfig signingConfigs.debug
        }
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.debug
        }
        create("staging"){
            //This build will uses production firebase project
            signingConfig signingConfigs.debug
            debuggable true
        }
    }

I have used google services plugin which allow me to have different json file (namely google-services.json) for each firebase project and build type but I have to manually change the applicationId to successfully build the project. I want to automate this thing! AGP or Google service plugin or gradle itself choose applicationId based on the build type. I have tried most of the solutions from stack-overflow and internet and yet all are in vain.

andorid {
      compileSdk 35
      defaultConfig{
      //for debug app, I change application id to com.xyZ.myproject
      //for staging/release app, I change application id to com.xyz.myproject
      applicationId "com.xyz.myprjoect"
      ...
      }
     ..
    //removed for brevity
 }

Try 1 : How to change applicationID dynamically as I don't want suffix, it didn't work.

debug {
      applicationIdSuffix '.xyZ.myproject'
    }
    staging{
applicationIdSuffix '.xyz.myproject'
}

Try 2 : Setting ApplicationID for every build variant

androidComponents.onVariants {
        // Remove the . between the base applicationId and the applicationIdSuffix that is being automatically added by gradle
        // so we can have this => com.mycompany.mainappname_fullversion instead of this => com.mycompany.mainappname._fullversion 
        it.applicationId.set(it.applicationId.get().replace("mainappname.", "mainappname"))
    }

onVariant not found error.

Try 3 : Using local properties and setting using code : first get local properties projects.findProperty("some_property")

applicationVariants.each{ variant ->
    if(variant.name.contains("debug")){
    appId = "com.xyZ.myproject"
    else
    appId = "com.xyz.myproject"

And ofcourse chatGpt

buildTypes {
        debug {
            applicationId = "com.example.debug"
            isMinifyEnabled = false
        }
        staging {
            applicationId = "com.example.staging"
            isMinifyEnabled = false
        }
        release {
            applicationId = "com.example.production"
            isMinifyEnabled = true
            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
        }
    }

to whom I had to tell that there is not property "applicationId" in the buildType.

• android
• firebase
• gradle
• android-gradle-plugin
• google-play-services

• "I have tried most of the solutions from stack-overflow" - please edit the question to show us what you tried and explain how it didn't work the way you expect. You might be doing something wrong, but we can't see what that is. Without that information, you question might be closed as a duplicate of those other questions. – Doug Stevenson Commented 22 hours ago
• Please edit your question and add the information Doug asked for, and please also respond using @. – Alex Mamo Commented 8 hours ago
• @AlexMamo I changed according what was asked. I added my tried solution? Should I add every step I took? or just relevant information? – Vivek Gupta Commented 8 hours ago

1 Answer 1

Only solution that I can think of is to add new client to the firebase debug project with package name "com.xyz.myproject.debug" and replace the google-services.json file with this client's json file. I guess, we can't change applicationId but can append using the property applicationIdSuffix which is available to us inside buildVariant closure.
So, my build variant will have :

 debug{
    //this build uses firebase project which is different from production
    signingConfig signingConfigs.debug
    applicationIdSuffix ".debug"
}

So this way, I do not have to change applicationId every time when I change the build variant. For Now, I will use this client but the question remains the same. Can't we replace the whole applicationId dynamically instead of appending?