How to achieve a full-screen dialog as described in material guidelines?

Question

Material guidelines describe the behavior of a full-screen dialog.

Full-screen dialog | Dialogs - Material Design

How can I achieve

Answer 1

The answer from Boss is correct, but missing the requested action bar as displayed on link in the question.

So, full example below.

Dialog fragment:

public class AKDialogFragment extends DialogFragment {

private static final String TAG = "AKDialogFragment";

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.dialog_ak, container, false);

    Toolbar toolbar = (Toolbar) rootView.findViewById(R.id.toolbar);
    toolbar.setTitle("Dialog title");

    ((AppCompatActivity) getActivity()).setSupportActionBar(toolbar);

    ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
    if (actionBar != null) {
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setHomeButtonEnabled(true);
        actionBar.setHomeAsUpIndicator(android.R.drawable.ic_menu_close_clear_cancel);
    }
    setHasOptionsMenu(true);
    return rootView;
}

@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    Dialog dialog = super.onCreateDialog(savedInstanceState);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    return dialog;
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    menu.clear();
    getActivity().getMenuInflater().inflate(R.menu.menu_ak, menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.action_save) {
        // handle confirmation button click here
        return true;
    } else if (id == android.R.id.home) {
        // handle close button click here
        dismiss();
        return true;
    }

    return super.onOptionsItemSelected(item);
}
}

Layout dialog_ak.xml:

Menu menu_ak.xml

Hosting activity must extend AppCompatActivity. Launching dialog is the same as in Boss answer:

FragmentManager fragmentManager = getSupportFragmentManager();
AKDialogFragment newFragment = new AKDialogFragment();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
transaction.add(android.R.id.content, newFragment).addToBackStack(null).commit();

I hope it helps someone.