Chek if have update

private void checkAppVersion() {
        DatabaseReference database = FirebaseUtils.getDatabase().getReference().child(Utils.APP_CONFIG);
        database.addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                String appVersion = dataSnapshot.child(Utils.VERSION).getValue(String.class).substring(0, 3);
                String currentVersion = String.valueOf(BuildConfig.VERSION_NAME).substring(0, 3);
                if (!appVersion.equals(currentVersion)) {
                    new AwesomeSuccessDialog(MainActivity.this)
                            .setTitle(R.string.new_update)
                            .setMessage(getString(R.string.new_update_msg))
                            .setColoredCircle(R.color.colorPrimary)
                            .setDialogIconAndColor(R.drawable.ic_dialog_info, R.color.white)
                            .setCancelable(false)
                            .setPositiveButtonText(getString(R.string.lets_go_ahead))
                            .setPositiveButtonbackgroundColor(R.color.colorPrimary)
                            .setPositiveButtonTextColor(R.color.white)
                            .setPositiveButtonClick(new Closure() {
                                @Override
                                public void exec() {
                                    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(Utils.APP_URL));
                                    startActivity(intent);
                                }
                            })
                            .show();
                }
            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });
    }