com.coffeecups.testproject.FriendPickerSampleActivity.java Source code

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Here is the source code for com.coffeecups.testproject.FriendPickerSampleActivity.java

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/**
 * Copyright 2010-present Facebook.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.coffeecups.testproject;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.facebook.SessionState;
import com.facebook.UiLifecycleHelper;
import com.facebook.model.GraphUser;
import com.facebook.Session;

import java.util.ArrayList;
import java.util.Collection;

public class FriendPickerSampleActivity extends FragmentActivity {
    private static final int PICK_FRIENDS_ACTIVITY = 1;
    private Button pickFriendsButton;
    private TextView resultsTextView;
    private UiLifecycleHelper lifecycleHelper;
    boolean pickFriendsWhenSessionOpened;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        resultsTextView = (TextView) findViewById(R.id.resultsTextView);
        pickFriendsButton = (Button) findViewById(R.id.pickFriendsButton);
        pickFriendsButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {
                onClickPickFriends();
            }
        });

        lifecycleHelper = new UiLifecycleHelper(this, new Session.StatusCallback() {
            @Override
            public void call(Session session, SessionState state, Exception exception) {
                onSessionStateChanged(session, state, exception);
            }
        });
        lifecycleHelper.onCreate(savedInstanceState);

        ensureOpenSession();
    }

    @Override
    protected void onStart() {
        super.onStart();

        // Update the display every time we are started.
        displaySelectedFriends(RESULT_OK);
    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
        case PICK_FRIENDS_ACTIVITY:
            displaySelectedFriends(resultCode);
            break;
        default:
            Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
            break;
        }
    }

    private boolean ensureOpenSession() {
        if (Session.getActiveSession() == null || !Session.getActiveSession().isOpened()) {
            Session.openActiveSession(this, true, new Session.StatusCallback() {
                @Override
                public void call(Session session, SessionState state, Exception exception) {
                    onSessionStateChanged(session, state, exception);
                }
            });
            return false;
        }
        return true;
    }

    private void onSessionStateChanged(Session session, SessionState state, Exception exception) {
        if (pickFriendsWhenSessionOpened && state.isOpened()) {
            pickFriendsWhenSessionOpened = false;

            startPickFriendsActivity();
        }
    }

    private void displaySelectedFriends(int resultCode) {
        String results = "";
        FriendPickerApplication application = (FriendPickerApplication) getApplication();

        Collection<GraphUser> selection = application.getSelectedUsers();
        if (selection != null && selection.size() > 0) {
            ArrayList<String> names = new ArrayList<String>();
            for (GraphUser user : selection) {
                names.add(user.getName());
            }
            results = TextUtils.join(", ", names);
        } else {
            results = "<No friends selected>";
        }

        resultsTextView.setText(results);
    }

    private void onClickPickFriends() {
        startPickFriendsActivity();
    }

    private void startPickFriendsActivity() {
        if (ensureOpenSession()) {
            FriendPickerApplication application = (FriendPickerApplication) getApplication();
            application.setSelectedUsers(null);

            Intent intent = new Intent(this, PickFriendsActivity.class);
            // Note: The following line is optional, as multi-select behavior is the default for
            // FriendPickerFragment. It is here to demonstrate how parameters could be passed to the
            // friend picker if single-select functionality was desired, or if a different user ID was
            // desired (for instance, to see friends of a friend).
            PickFriendsActivity.populateParameters(intent, null, true, true);
            startActivityForResult(intent, PICK_FRIENDS_ACTIVITY);
        } else {
            pickFriendsWhenSessionOpened = true;
        }
    }
}