Detect if new install or updated version (Android app)

Question

I have an app on the Play Store. I want to put a requirement that if users want to use a certain part of the app, they have to invite a friend before being able to do so. Bu

Answer 1

My solution is use SahredPreference

private int getFirstTimeRun() {
    SharedPreferences sp = getSharedPreferences("MYAPP", 0);
    int result, currentVersionCode = BuildConfig.VERSION_CODE;
    int lastVersionCode = sp.getInt("FIRSTTIMERUN", -1);
    if (lastVersionCode == -1) result = 0; else
        result = (lastVersionCode == currentVersionCode) ? 1 : 2;
    sp.edit().putInt("FIRSTTIMERUN", currentVersionCode).apply();
    return result;
}

return 3 posibles values:

• 0: The APP is First Install
• 1: The APP run once time
• 2: The APP is Updated