Autoincrement VersionCode with gradle extra properties

Question

I'm building an Android app with gradle. Until now I used the Manifest file to increase the versionCode, but I would like to read the versionCode from an external file and depending if it is the release flavor or the debug flavor increase the versionCode. I tried the extra properties, but you can't save them, which means that next time I build it I'm getting the same versionCode. Any help would be very much appreciated! ``` project.ext{ devVersionCode = 13 releaseVersionCode = 1 } buildscript { repositories { mavenCentral() } dependencies { classpath 'com.android.tools.build:gradle:0.6.+' } } apply plugin: 'android' repositories { mavenCentral() } dependencies { compile project(':Cropper') compile "com.android.support:appcompat-v7:18.0.+" compile "com.android.support:support-v4:18.0.+" compile fileTree(dir: 'libs', include: '*.jar') } def getReleaseVersionCode() { def version = project.releaseVersionCode + 1 project.releaseVersionCode = version println sprintf("Returning version %d",…

Accepted Answer

I would like to read the versionCode from an external file

I am sure that there are any number of possible solutions; here is one:

```
android {
    compileSdkVersion 18
    buildToolsVersion "18.1.0"

def versionPropsFile = file('version.properties')

if (versionPropsFile.canRead()) {
        def Properties versionProps = new Properties()

versionProps.load(new FileInputStream(versionPropsFile))

def code = versionProps['VERSION_CODE'].toInteger() + 1

versionProps['VERSION_CODE']=code.toString()
        versionProps.store(versionPropsFile.newWriter(), null)

defaultConfig {
            versionCode code
            versionName "1.1"
            minSdkVersion 14
            targetSdkVersion 18
        }
    }
    else {
        throw new GradleException("Could not read version.properties!")
    }

// rest of android block goes here
}
```

This code expects an existing `version.properties` file, which you would create by hand before the first build to have `VERSION_CODE=8`.

This code simply bumps the version code on each build -- you would need to extend the technique to handle your per-flavor version code.

You can see the Versioning sample project that demonstrates this code.

Autoincrement VersionCode with gradle extra properties

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