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.androidgames.sleepytrout; import android.app.AlertDialog; import android.content.Intent; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.content.pm.Signature; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.location.Location; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.text.TextUtils; import android.util.Base64; import android.util.Log; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import com.facebook.*; import com.facebook.model.GraphObject; import com.facebook.model.GraphPlace; import com.facebook.model.GraphUser; import com.facebook.widget.*; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.*; public class HelloFacebookSampleActivity extends FragmentActivity { private static final String PERMISSION = "publish_actions"; private final String PENDING_ACTION_BUNDLE_KEY = "HelloFacebookSampleActivity:PendingAction"; private Button postStatusUpdateButton; private LoginButton loginButton; private ProfilePictureView profilePictureView; private TextView greeting; private PendingAction pendingAction = PendingAction.NONE; private GraphUser user; private GraphPlace place; private List<GraphUser> tags; private boolean canPresentShareDialog; private enum PendingAction { NONE, POST_STATUS_UPDATE } 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 FacebookDialog.Callback dialogCallback = new FacebookDialog.Callback() { @Override public void onError(FacebookDialog.PendingCall pendingCall, Exception error, Bundle data) { Log.d("HelloFacebook", String.format("Error: %s", error.toString())); } @Override public void onComplete(FacebookDialog.PendingCall pendingCall, Bundle data) { Log.d("HelloFacebook", "Success!"); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); uiHelper = new UiLifecycleHelper(this, callback); uiHelper.onCreate(savedInstanceState); if (savedInstanceState != null) { String name = savedInstanceState.getString(PENDING_ACTION_BUNDLE_KEY); pendingAction = PendingAction.valueOf(name); } setContentView(R.layout.facebook_main); loginButton = (LoginButton) findViewById(R.id.login_button); loginButton.setUserInfoChangedCallback(new LoginButton.UserInfoChangedCallback() { @Override public void onUserInfoFetched(GraphUser user) { HelloFacebookSampleActivity.this.user = user; updateUI(); // It's possible that we were waiting for this.user to be populated in order to post a // status update. handlePendingAction(); } }); profilePictureView = (ProfilePictureView) findViewById(R.id.profilePicture); greeting = (TextView) findViewById(R.id.greeting); postStatusUpdateButton = (Button) findViewById(R.id.postStatusUpdateButton); postStatusUpdateButton.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { onClickPostStatusUpdate(); } }); // Can we present the share dialog for regular links? canPresentShareDialog = FacebookDialog.canPresentShareDialog(this, FacebookDialog.ShareDialogFeature.SHARE_DIALOG); } @Override protected void onResume() { super.onResume(); uiHelper.onResume(); // 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); updateUI(); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); uiHelper.onSaveInstanceState(outState); outState.putString(PENDING_ACTION_BUNDLE_KEY, pendingAction.name()); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); uiHelper.onActivityResult(requestCode, resultCode, data, dialogCallback); } @Override public void onPause() { super.onPause(); uiHelper.onPause(); } @Override public void onDestroy() { super.onDestroy(); uiHelper.onDestroy(); } private void onSessionStateChange(Session session, SessionState state, Exception exception) { if (pendingAction != PendingAction.NONE && (exception instanceof FacebookOperationCanceledException || exception instanceof FacebookAuthorizationException)) { new AlertDialog.Builder(HelloFacebookSampleActivity.this).setTitle(R.string.cancelled) .setMessage(R.string.permission_not_granted).setPositiveButton(R.string.ok, null).show(); pendingAction = PendingAction.NONE; } else if (state == SessionState.OPENED_TOKEN_UPDATED) { handlePendingAction(); } updateUI(); } private void updateUI() { Session session = Session.getActiveSession(); boolean enableButtons = (session != null && session.isOpened()); postStatusUpdateButton.setEnabled(enableButtons || canPresentShareDialog); if (enableButtons && user != null) { profilePictureView.setProfileId(user.getId()); greeting.setText(getString(R.string.hello_user, user.getFirstName())); } else { profilePictureView.setProfileId(null); greeting.setText(null); } } @SuppressWarnings("incomplete-switch") private void handlePendingAction() { PendingAction previouslyPendingAction = pendingAction; // These actions may re-set pendingAction if they are still pending, but we assume they // will succeed. pendingAction = PendingAction.NONE; if (previouslyPendingAction == PendingAction.POST_STATUS_UPDATE) { postStatusUpdate(); } } private interface GraphObjectWithId extends GraphObject { String getId(); } private void showPublishResult(String message, GraphObject result, FacebookRequestError error) { String title = null; String alertMessage = null; if (error == null) { title = getString(R.string.success); String id = result.cast(GraphObjectWithId.class).getId(); alertMessage = getString(R.string.successfully_posted_post, message, id); } else { title = getString(R.string.error); alertMessage = error.getErrorMessage(); } new AlertDialog.Builder(this).setTitle(title).setMessage(alertMessage).setPositiveButton(R.string.ok, null) .show(); } private void onClickPostStatusUpdate() { performPublish(PendingAction.POST_STATUS_UPDATE, canPresentShareDialog); } private FacebookDialog.ShareDialogBuilder createShareDialogBuilderForLink() { return new FacebookDialog.ShareDialogBuilder(this).setName("Hello Facebook") .setDescription("The 'Hello Facebook' sample application showcases simple Facebook integration") .setLink("http://developers.facebook.com/android"); } private void postStatusUpdate() { if (canPresentShareDialog) { FacebookDialog shareDialog = createShareDialogBuilderForLink().build(); uiHelper.trackPendingDialogCall(shareDialog.present()); } else if (user != null && hasPublishPermission()) { final String message = getString(R.string.status_update, user.getFirstName(), Integer.toString(Settings.highscores[1]), (new Date().toString())); Request request = Request.newStatusUpdateRequest(Session.getActiveSession(), message, place, tags, new Request.Callback() { @Override public void onCompleted(Response response) { showPublishResult(message, response.getGraphObject(), response.getError()); } }); request.executeAsync(); } else { pendingAction = PendingAction.POST_STATUS_UPDATE; } } private boolean hasPublishPermission() { Session session = Session.getActiveSession(); return session != null && session.getPermissions().contains("publish_actions"); } private void performPublish(PendingAction action, boolean allowNoSession) { Session session = Session.getActiveSession(); if (session != null) { pendingAction = action; if (hasPublishPermission()) { // We can do the action right away. handlePendingAction(); return; } else if (session.isOpened()) { // We need to get new permissions, then complete the action when we get called back. session.requestNewPublishPermissions(new Session.NewPermissionsRequest(this, PERMISSION)); return; } } if (allowNoSession) { pendingAction = action; handlePendingAction(); } } }