Android BuildConfig.VERSION_NAME returning null?

Question

I'd like to simply display my version name on my login screen, however, it's always returning null. I've defined my versionName in my app's gradle build as follows:

    defaultConfig {
    applicationId "com.maplesyrupindustries.j.airportmeet"
    minSdkVersion 19
    targetSdkVersion 24
    versionCode 7
    versionName "1.0.6"
    multiDexEnabled true
}

And I am calling it in my login's onCreate:

    String build = BuildConfig.VERSION_NAME;
    Log.e(TAG, BuildConfig.VERSION_NAME);
    tvVersion.setText("Alpha " + build);

Yet, the build string is always empty. What gives?

Answer 1

Please try this

PackageInfo pInfo = getPackageManager().getPackageInfo(getPackageName(), 0);
String version = pInfo.versionName;//Version Name
int verCode = pInfo.versionCode;//Version Code