@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    String[] fingerprints = VKUtil.getCertificateFingerprint(this, this.getPackageName());
    System.out.println(Arrays.asList(fingerprints));

    login();
    VKSdk.login(this, scope);

}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (!VKSdk.onActivityResult(requestCode, resultCode, data, new VKCallback<VKAccessToken>() {
        @Override
        public void onResult(VKAccessToken res) {
        }

        @Override
        public void onError(VKError error) {
        }
    })) {
        super.onActivityResult(requestCode, resultCode, data);
    }
}

public void vklogin(View view) {

    btn = (Button) findViewById(R.id.vkbut);

    btn.setOnClickListener(
            new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                   Intent intent = new Intent(view.getContext(), VKAuth.class);
                   startActivity(intent);

                }
            }
    );
}