Android version code for App updating

Question

I read that if we want to update an app in google play, the version Code should be higher than the previous apk file. I've an app with version code: 20 and version name 1.0. So to update the app, how should I increase the version code? Should it increase by 10? or just 1 is enough? ie, version code from 20 to 30 or version code from 20 to 21?

Answer 1

VersionCode

This number is used only to determine whether one version is more recent than another, with higher numbers indicating more recent versions. Typically, you would release the first version of your app with versionCode set to 1, then monotonically increase the value with each release, regardless whether the release constitutes a major or minor release. This means that the versionCode value does not necessarily have a strong resemblance to the app release version that is visible to the user (see versionName, below). Apps and publishing services should not display this version value to users.

    defaultConfig 
    {
    minSdkVersion 17
    targetSdkVersion 23
    versionCode 1  // Default , You can increase 1 when update .
    versionName "1.0"
    }