Android: First run popup dialog

Question

I am trying to make a popup dialog that only shows after the app\'s first run that will alert users of the new changes in the app. So I have a dialog popup like this:

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Answer 1

Like this you can make a difference between a new install and a update.

String StoredVersionname = "";
String VersionName;
AlertDialog LoginDialog;
AlertDialog UpdateDialog;
AlertDialog FirstRunDialog;
SharedPreferences prefs;

public static String getVersionName(Context context, Class cls) {
    try {
        ComponentName comp = new ComponentName(context, cls);
        PackageInfo pinfo = context.getPackageManager().getPackageInfo(
                comp.getPackageName(), 0);
        return "Version: " + pinfo.versionName;
    } catch (android.content.pm.PackageManager.NameNotFoundException e) {
        return null;
    }
}

public void CheckFirstRun() {
    VersionName = MyActivity.getVersionName(this, MyActivity.class);
    prefs = PreferenceManager.getDefaultSharedPreferences(this);
    StoredVersionname = (prefs.getString("versionname", null));
    if (StoredVersionname == null || StoredVersionname.length() == 0){
        FirstRunDialog = new FirstRunDialog(this);
        FirstRunDialog.show();
    }else if (StoredVersionname != VersionName) {
        UpdateDialog = new UpdateDialog(this);
        UpdateDialog.show();
    }
    prefs.edit().putString("versionname", VersionName).commit();
}