Java tutorial
/** * 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.facebook.samples.rps; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.view.Menu; import android.view.MenuItem; import android.widget.Toast; import bolts.AppLinks; import com.facebook.*; import static com.facebook.samples.rps.RpsGameUtils.INVALID_CHOICE; public class MainActivity extends FragmentActivity { static final int RPS = 0; static final int SETTINGS = 1; static final int CONTENT = 2; static final int FRAGMENT_COUNT = CONTENT + 1; private Fragment[] fragments = new Fragment[FRAGMENT_COUNT]; private MenuItem settings; private MenuItem friends; private MenuItem share; private MenuItem message; private boolean isResumed = false; private UiLifecycleHelper uiHelper; private Session.StatusCallback callback = new Session.StatusCallback() { @Override public void call(Session session, SessionState state, Exception exception) { onSessionStateChange(session, state, exception); } }; private boolean hasNativeLink = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); uiHelper = new UiLifecycleHelper(this, callback); uiHelper.onCreate(savedInstanceState); setContentView(R.layout.main); FragmentManager fm = getSupportFragmentManager(); fragments[RPS] = fm.findFragmentById(R.id.rps_fragment); fragments[SETTINGS] = fm.findFragmentById(R.id.settings_fragment); fragments[CONTENT] = fm.findFragmentById(R.id.content_fragment); FragmentTransaction transaction = fm.beginTransaction(); for (int i = 0; i < fragments.length; i++) { transaction.hide(fragments[i]); } transaction.commit(); hasNativeLink = handleNativeLink(); } @Override public void onResume() { super.onResume(); uiHelper.onResume(); isResumed = true; // Call the 'activateApp' method to log an app event for use in analytics and advertising reporting. Do so in // the onResume methods of the primary Activities that an app may be launched into. AppEventsLogger.activateApp(this); } @Override public void onPause() { super.onPause(); uiHelper.onPause(); isResumed = false; // Call the 'deactivateApp' method to log an app event for use in analytics and advertising // reporting. Do so in the onPause methods of the primary Activities that an app may be launched into. AppEventsLogger.deactivateApp(this); } @Override public void onStop() { super.onStop(); uiHelper.onStop(); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); uiHelper.onActivityResult(requestCode, resultCode, data); } @Override public void onDestroy() { super.onDestroy(); uiHelper.onDestroy(); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); uiHelper.onSaveInstanceState(outState); } @Override protected void onResumeFragments() { super.onResumeFragments(); if (hasNativeLink) { showFragment(CONTENT, false); hasNativeLink = false; } else { showFragment(RPS, false); } } @Override public boolean onPrepareOptionsMenu(Menu menu) { // only add the menu when the selection fragment is showing if (fragments[RPS].isVisible()) { if (menu.size() == 0) { share = menu.add(R.string.share_on_facebook); message = menu.add(R.string.send_with_messenger); friends = menu.add(R.string.see_friends); settings = menu.add(R.string.check_settings); } return true; } else { menu.clear(); settings = null; } return false; } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.equals(settings)) { showFragment(SETTINGS, true); return true; } else if (item.equals(friends)) { Intent intent = new Intent(); intent.setClass(this, FriendActivity.class); startActivity(intent); return true; } else if (item.equals(share)) { RpsFragment fragment = (RpsFragment) fragments[RPS]; fragment.shareUsingNativeDialog(); return true; } else if (item.equals(message)) { RpsFragment fragment = (RpsFragment) fragments[RPS]; fragment.shareUsingMessengerDialog(); return true; } return false; } private boolean handleNativeLink() { Session existingSession = Session.getActiveSession(); // If we have a valid existing session, we'll use it; if not, open one using the provided Intent // but do not cache the token (we don't want to use the same user identity the next time the // app is run). if (existingSession == null || !existingSession.isOpened()) { AccessToken accessToken = AccessToken.createFromNativeLinkingIntent(getIntent()); if (accessToken != null) { Session newSession = new Session.Builder(this) .setTokenCachingStrategy(new NonCachingTokenCachingStrategy()).build(); newSession.open(accessToken, null); Session.setActiveSession(newSession); } } // See if we have a deep link in addition. int appLinkGesture = getAppLinkGesture(getIntent()); if (appLinkGesture != INVALID_CHOICE) { ContentFragment fragment = (ContentFragment) fragments[CONTENT]; fragment.setContentIndex(appLinkGesture); return true; } return false; } private int getAppLinkGesture(Intent intent) { Uri targetURI = AppLinks.getTargetUrlFromInboundIntent(this, intent); if (targetURI == null) { return INVALID_CHOICE; } String gesture = targetURI.getQueryParameter("gesture"); if (gesture != null && gesture.equalsIgnoreCase(getString(R.string.rock))) { return RpsGameUtils.ROCK; } else if (gesture.equalsIgnoreCase(getString(R.string.paper))) { return RpsGameUtils.PAPER; } else if (gesture.equalsIgnoreCase(getString(R.string.scissors))) { return RpsGameUtils.SCISSORS; } return INVALID_CHOICE; } private void onSessionStateChange(Session session, SessionState state, Exception exception) { if (isResumed) { if (exception != null && !(exception instanceof FacebookOperationCanceledException)) { Toast.makeText(this, R.string.login_error, Toast.LENGTH_SHORT).show(); return; } if (session.isClosed()) { showFragment(RPS, false); } } } void showFragment(int fragmentIndex, boolean addToBackStack) { FragmentManager fm = getSupportFragmentManager(); FragmentTransaction transaction = fm.beginTransaction(); if (addToBackStack) { transaction.addToBackStack(null); } else { int backStackSize = fm.getBackStackEntryCount(); for (int i = 0; i < backStackSize; i++) { fm.popBackStack(); } } for (int i = 0; i < fragments.length; i++) { if (i == fragmentIndex) { transaction.show(fragments[i]); } else { transaction.hide(fragments[i]); } } transaction.commit(); } }