Stoph Stoph - 17 days ago 7
Android Question

Using a different manifestPlaceholder for each Build Variant

I will start by saying that I am very new to Gradle, so I apologize if this has already been answered.

I'm working on an Android application that uses an API key to access a 3rd party tool. A different API key needs to be used depending on both the flavor and build type of the app.

Here is a basic outline of what I'm trying to do:

android {
defaultConfig {
manifestPlaceholders = [ apiKey:"DEBUG_KEY" ]
}

buildTypes{
debug{
// Some debug setup
}
release{
// Some release setup
}
}

productFlavors {
// List of flavor options
}
productFlavors.all{ flavor->
if (flavor.name.equals("someFlavor")) {
if (buildType.equals("release")) {
manifestPlaceholders = [ apiKey:"RELEASE_KEY_1" ]
} else {
manifestPlaceholders = [ apiKey:"DEBUG_KEY" ]
}
} else {
if (buildType.equals("release")) {
manifestPlaceholders = [ apiKey:"RELEASE_KEY_2" ]
} else {
manifestPlaceholders = [ apiKey:"DEBUG_KEY" ]
}
}
}
}


So far the
manifestPlaceholders
statement is working in a very simple case, but I don't know how to reference the buildType from within the productFlavors block so that I can use it as a conditional.

Answer

I would guess that you are referring to Fabric ApiKey? :) I just spent hours trying to do it in a similar way with the placeholders and specifying the ApiKey in the gradle file although it does not seem possible as of com.android.tools.build:gradle:1.3.1. It is possible to specify a placeholder for a specific flavor but not for a flavor AND buildType.

Just to correct your syntax, the way you would have to do it (if it was possible) would be something like that but manifestPlaceholders are unknown to variants.

applicationVariants.all{ variant->
    if (variant.productFlavors.get(0).name.equals("someFlavor")) {
        if (variant.buildType.name.equals("release")) {
            manifestPlaceholders = [ apiKey:"RELEASE_KEY_1" ]
        } else {
            manifestPlaceholders = [ apiKey:"DEBUG_KEY" ]
        }
    } else {
        if (variant.buildType.name.equals("release")) {
            manifestPlaceholders = [ apiKey:"RELEASE_KEY_2" ]
        } else {
            manifestPlaceholders = [ apiKey:"DEBUG_KEY" ]
        }    
    }
}

What you actually need to do is to keep the key in the AndroidManifest.xml and handle it with multiple manifest file

src/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools">    
    <application>    
        <meta-data
            android:name="io.fabric.ApiKey"
            android:value="DEBUG_KEY" tools:replace="android:value"/>
    </application>    
</manifest>

src/someFlavorRelease/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools">    
    <application>    
        <meta-data
            android:name="io.fabric.ApiKey"
            android:value="RELEASE_KEY_1" tools:replace="android:value"/>
    </application>    
</manifest>

src/someOtherFlavorRelease/AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools">    
    <application>    
        <meta-data
            android:name="io.fabric.ApiKey"
            android:value="RELEASE_KEY_2" tools:replace="android:value"/>
    </application>    
</manifest>

The manifestMerger will handle the replacement and you will end up with the proper key in every scenario. I just implemented it successfully. I just hope you were really referring to the Fabric key! :)

Hope this helps!