Pass data from an Activity to a fragment

I am a little bit lost in this, so I already passed data from my LoginActivity to my DashboardActivity. And it works now (thank god). But now, I would love to pass that data to a fragment.

I have this on my DashboardActivity:

Intent get = getIntent();
String userId = get.getStringExtra(LoginActivity.EXTRA_ID);

Bundle bundle = new Bundle();
bundle.putString("userId", userId);
Fragment fragment = new Fragment();
fragment.setArguments(bundle);

I have this on my Fragment:

Bundle bundle = getArguments();
String userId = bundle.getString("userId");
int uid = Integer.parseInt(userId);

Is it like this?

Getting data in Fragment and Activity are not done in the same way.
To send extra to a fragment, You can do it this way.

In your Activity Class

Bundle bundle = new Bundle();
bundle.putString("userId", "value you want to send");

FragmentClass frag = new FragmentClass();
frag.setArguments(bundle);

Then in Fragement onCreateView

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    String strtext = getArguments().getString("userId");    
    return inflater.inflate(R.layout.fragment, container, false);
}

The issue with your code is you're getting the argument with a wrong id.

Right way

String userId = getArguments().getString("userId");

From activity to fragment you should use bundle as below

Bundle bundle = new Bundle();
bundle.putString(LoginActivity.EXTRA_ID, "Extra value");
Fragment fragment = new Fragment();
fragment.setArguments(bundle);

Then in your Fragment, get the data for example in onCreate() method

Bundle bundle = this.getArguments();
if (bundle != null) {
        String extraId = bundle.getString(key, defaultValue);
}