InviteFragment.java

package com.sromku.simple.fb.example.fragments;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

import com.sromku.simple.fb.SimpleFacebook;
import com.sromku.simple.fb.example.R;
import com.sromku.simple.fb.listeners.OnInviteListener;
import com.sromku.simple.fb.utils.Utils;

import java.util.List;

public class InviteFragment extends Fragment {

    private final static String EXAMPLE = "Invite all";

    private Button mButton;
    private TextView mResult;
    private final static String INVITE_MESSAGE = "I invite you to join me";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getActivity().setTitle(EXAMPLE);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_invite_all, container, false);
        mResult = (TextView) view.findViewById(R.id.result);
        mButton = (Button) view.findViewById(R.id.button);
        mButton.setText(EXAMPLE);
        mButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                OnInviteListener onInviteListener = new OnInviteListener() {
                    @Override
                    public void onFail(String reason) {
                        mResult.setText(reason);
                    }

                    @Override
                    public void onException(Throwable throwable) {
                        mResult.setText(throwable.getMessage());
                    }

                    @Override
                    public void onComplete(List<String> invitedFriends, String requestId) {
                        String print = "<u><b>Requet Id</b></u><br>" + requestId + "<br><br>";
                        print += String.format("<u><b>Invited Ids (%d)</b></u><br>", invitedFriends.size());
                        print += Utils.join(invitedFriends.iterator(), "<br>");
                        mResult.setText(Html.fromHtml(print));
                    }

                    @Override
                    public void onCancel() {
                        mResult.setText(Html.fromHtml("<u><b>Result</b></u>	<br>Canceled invitation"));
                    }
                };
                SimpleFacebook.getInstance(getActivity()).invite(INVITE_MESSAGE, onInviteListener, null);
            }
        });
        return view;
    }
}