Java tutorial
/* * Copyright 2004 - Present Facebook, Inc. * * 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 org.comu.homescreen; import java.io.IOException; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.provider.MediaStore; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import android.widget.ListView; import android.widget.AdapterView; import android.widget.Toast; import org.comu.homescreen.*; import org.comu.homescreen.SessionEvents.AuthListener; import org.comu.homescreen.SessionEvents.LogoutListener; import org.comu.homescreen1.AsyncFacebookRunner; import org.comu.homescreen1.Facebook; import org.comu.homescreen1.FacebookError; import org.comu.homescreen1.Util; import android.widget.AdapterView.OnItemClickListener; public class Hackbook extends Activity implements OnItemClickListener { /* Your Facebook Application ID must be set before running this example * See http://www.facebook.com/developers/createapp.php */ public static final String APP_ID = "157111564357680"; private LoginButton mLoginButton; private TextView mText; private ImageView mUserPic; private Handler mHandler; ProgressDialog dialog; final int AUTHORIZE_ACTIVITY_RESULT_CODE = 0; final int PICK_EXISTING_PHOTO_RESULT_CODE = 1; private String graph_or_fql; private ListView list; String[] main_items = { "Update Status", "App Requests", "Get Friends", "Upload Photo", "Place Check-in", "Run FQL Query", "Graph API Explorer" }; String[] permissions = { "offline_access", "publish_stream", "user_photos", "publish_checkins", "photo_upload" }; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (APP_ID == null) { Util.showAlert(this, "Warning", "Facebook Applicaton ID must be " + "specified before running this example: see FbAPIs.java"); return; } setContentView(R.layout.main); mHandler = new Handler(); mText = (TextView) Hackbook.this.findViewById(R.id.txt); mUserPic = (ImageView) Hackbook.this.findViewById(R.id.user_pic); //Create the Facebook Object using the app id. Utility.mFacebook = new Facebook(APP_ID); //Instantiate the asynrunner object for asynchronous api calls. Utility.mAsyncRunner = new AsyncFacebookRunner(Utility.mFacebook); mLoginButton = (LoginButton) findViewById(R.id.login); //restore session if one exists SessionStore.restore(Utility.mFacebook, this); SessionEvents.addAuthListener(new FbAPIsAuthListener()); SessionEvents.addLogoutListener(new FbAPIsLogoutListener()); /* * Source Tag: login_tag */ mLoginButton.init(this, AUTHORIZE_ACTIVITY_RESULT_CODE, Utility.mFacebook, permissions); if (Utility.mFacebook.isSessionValid()) { requestUserData(); } list = (ListView) findViewById(R.id.main_list); list.setOnItemClickListener(this); list.setAdapter(new ArrayAdapter<String>(this, R.layout.main_list_item, main_items)); } @Override public void onResume() { super.onResume(); if (Utility.mFacebook != null && !Utility.mFacebook.isSessionValid()) { mText.setText("You are logged out! "); mUserPic.setImageBitmap(null); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { /* * if this is the activity result from authorization flow, do a call back to authorizeCallback * Source Tag: login_tag */ case AUTHORIZE_ACTIVITY_RESULT_CODE: { Utility.mFacebook.authorizeCallback(requestCode, resultCode, data); break; } /* * if this is the result for a photo picker from the gallery, upload the image after scaling it. * You can use the Utility.scaleImage() function for scaling */ case PICK_EXISTING_PHOTO_RESULT_CODE: { if (resultCode == Activity.RESULT_OK) { Uri photoUri = data.getData(); if (photoUri != null) { Bundle params = new Bundle(); try { params.putByteArray("photo", Utility.scaleImage(getApplicationContext(), photoUri)); } catch (IOException e) { e.printStackTrace(); } params.putString("caption", "FbAPIs Sample App photo upload"); Utility.mAsyncRunner.request("me/photos", params, "POST", new PhotoUploadListener(), null); } else { Toast.makeText(getApplicationContext(), "Error selecting image from the gallery.", Toast.LENGTH_SHORT).show(); } } else { Toast.makeText(getApplicationContext(), "No image selected for upload.", Toast.LENGTH_SHORT).show(); } break; } } } @Override public void onItemClick(AdapterView<?> arg0, View v, int position, long arg3) { switch (position) { /* * Source Tag: update_status_tag * Update user's status by invoking the feed dialog * To post to a friend's wall, provide his uid in the 'to' parameter * Refer to https://developers.facebook.com/docs/reference/dialogs/feed/ for more info. */ case 0: { Bundle params = new Bundle(); params.putString("caption", getString(R.string.app_name)); params.putString("description", getString(R.string.app_desc)); params.putString("picture", Utility.HACK_ICON_URL); params.putString("name", getString(R.string.app_action)); Utility.mFacebook.dialog(Hackbook.this, "feed", params, new UpdateStatusListener()); String access_token = Utility.mFacebook.getAccessToken(); System.out.println(access_token); break; } /* * Source Tag: app_requests * Send an app request to friends. If no friend is specified, the user will see a friend selector and will be able to select a maximum of 50 recipients. * To send request to specific friend, provide the uid in the 'to' parameter * Refer to https://developers.facebook.com/docs/reference/dialogs/requests/ for more info. */ case 1: { Bundle params = new Bundle(); params.putString("message", getString(R.string.request_message)); Utility.mFacebook.dialog(Hackbook.this, "apprequests", params, new AppRequestsListener()); break; } /* * Source Tag: friends_tag * You can get friends using graph.facebook.com/me/friends, this returns the list sorted by UID * OR * using the friend table. With this you can sort the way you want it. * friend table - https://developers.facebook.com/docs/reference/fql/friend/ * user table - https://developers.facebook.com/docs/reference/fql/user/ */ case 2: { if (!Utility.mFacebook.isSessionValid()) { Util.showAlert(this, "Warning", "You must first log in."); } else { dialog = ProgressDialog.show(Hackbook.this, "", getString(R.string.please_wait), true, true); new AlertDialog.Builder(this).setTitle(R.string.Graph_FQL_title).setMessage(R.string.Graph_FQL_msg) .setPositiveButton(R.string.graph_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { graph_or_fql = "graph"; Bundle params = new Bundle(); params.putString("fields", "name, picture, location"); Utility.mAsyncRunner.request("me/friends", params, new FriendsRequestListener()); } }).setNegativeButton(R.string.fql_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { graph_or_fql = "fql"; String query = "select name, current_location, uid, pic_square from user where uid in (select uid2 from friend where uid1=me()) order by name"; Bundle params = new Bundle(); params.putString("method", "fql.query"); params.putString("query", query); Utility.mAsyncRunner.request(null, params, new FriendsRequestListener()); } }).setOnCancelListener(new DialogInterface.OnCancelListener() { @Override public void onCancel(DialogInterface d) { dialog.dismiss(); } }).show(); } break; } /* * Source Tag: upload_photo * You can upload a photo from the media gallery or from a remote server * How to upload photo: https://developers.facebook.com/blog/post/498/ */ case 3: { if (!Utility.mFacebook.isSessionValid()) { Util.showAlert(this, "Warning", "You must first log in."); } else { dialog = ProgressDialog.show(Hackbook.this, "", getString(R.string.please_wait), true, true); new AlertDialog.Builder(this).setTitle(R.string.gallery_remote_title) .setMessage(R.string.gallery_remote_msg) .setPositiveButton(R.string.gallery_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Intent intent = new Intent(Intent.ACTION_PICK, (MediaStore.Images.Media.EXTERNAL_CONTENT_URI)); startActivityForResult(intent, PICK_EXISTING_PHOTO_RESULT_CODE); } }).setNegativeButton(R.string.remote_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { /* * Source tag: upload_photo_tag */ Bundle params = new Bundle(); params.putString("url", "http://www.facebook.com/images/devsite/iphone_connect_btn.jpg"); params.putString("caption", "FbAPIs Sample App photo upload"); Utility.mAsyncRunner.request("me/photos", params, "POST", new PhotoUploadListener(), null); } }).setOnCancelListener(new DialogInterface.OnCancelListener() { @Override public void onCancel(DialogInterface d) { dialog.dismiss(); } }).show(); } break; } /* * User can check-in to a place, you require publish_checkins permission for that. * You can use the default Times Square location or fetch user's current location * Get user's checkins - https://developers.facebook.com/docs/reference/api/checkin/ */ case 4: { final Intent myIntent = new Intent(getApplicationContext(), Places.class); new AlertDialog.Builder(this).setTitle(R.string.get_location) .setMessage(R.string.get_default_or_new_location) .setPositiveButton(R.string.current_location_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { myIntent.putExtra("LOCATION", "current"); startActivity(myIntent); } }).setNegativeButton(R.string.times_square_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { myIntent.putExtra("LOCATION", "times_square"); startActivity(myIntent); } }).show(); break; } case 5: { if (!Utility.mFacebook.isSessionValid()) { Util.showAlert(this, "Warning", "You must first log in."); } else { new FQLQuery(Hackbook.this).show(); } break; } /* * This is advanced feature where you can request new permissions * Browser user's graph, his fields and connections. * This is similar to the www version - http://developers.facebook.com/tools/explorer/ */ case 6: { Intent myIntent = new Intent(getApplicationContext(), GraphExplorer.class); if (Utility.mFacebook.isSessionValid()) { Utility.objectID = "me"; } startActivity(myIntent); break; } } } /* * callback for the feed dialog which updates the profile status */ public class UpdateStatusListener extends BaseDialogListener { public void onComplete(Bundle values) { final String postId = values.getString("post_id"); if (postId != null) { new UpdateStatusResultDialog(Hackbook.this, "Update Status executed", values).show(); } else { Toast toast = Toast.makeText(getApplicationContext(), "No wall post made", Toast.LENGTH_SHORT); toast.show(); } } public void onFacebookError(FacebookError error) { Toast.makeText(getApplicationContext(), "Facebook Error: " + error.getMessage(), Toast.LENGTH_SHORT) .show(); } public void onCancel() { Toast toast = Toast.makeText(getApplicationContext(), "Update status cancelled", Toast.LENGTH_SHORT); toast.show(); } } /* * callback for the apprequests dialog which sends an app request to user's friends. */ public class AppRequestsListener extends BaseDialogListener { public void onComplete(Bundle values) { Toast toast = Toast.makeText(getApplicationContext(), "App request sent", Toast.LENGTH_SHORT); toast.show(); } public void onFacebookError(FacebookError error) { Toast.makeText(getApplicationContext(), "Facebook Error: " + error.getMessage(), Toast.LENGTH_SHORT) .show(); } public void onCancel() { Toast toast = Toast.makeText(getApplicationContext(), "App request cancelled", Toast.LENGTH_SHORT); toast.show(); } } /* * callback after friends are fetched via me/friends or fql query. */ public class FriendsRequestListener extends BaseRequestListener { public void onComplete(final String response, final Object state) { dialog.dismiss(); Intent myIntent = new Intent(getApplicationContext(), FriendsList.class); myIntent.putExtra("API_RESPONSE", response); myIntent.putExtra("METHOD", graph_or_fql); startActivity(myIntent); } public void onFacebookError(FacebookError error) { dialog.dismiss(); Toast.makeText(getApplicationContext(), "Facebook Error: " + error.getMessage(), Toast.LENGTH_SHORT) .show(); } } /* * callback for the photo upload */ public class PhotoUploadListener extends BaseRequestListener { public void onComplete(final String response, final Object state) { dialog.dismiss(); mHandler.post(new Runnable() { public void run() { new UploadPhotoResultDialog(Hackbook.this, "Upload Photo executed", response).show(); } }); } public void onFacebookError(FacebookError error) { dialog.dismiss(); Toast.makeText(getApplicationContext(), "Facebook Error: " + error.getMessage(), Toast.LENGTH_LONG) .show(); } } public class FQLRequestListener extends BaseRequestListener { public void onComplete(final String response, final Object state) { mHandler.post(new Runnable() { public void run() { Toast.makeText(getApplicationContext(), "Response: " + response, Toast.LENGTH_LONG).show(); } }); } public void onFacebookError(FacebookError error) { Toast.makeText(getApplicationContext(), "Facebook Error: " + error.getMessage(), Toast.LENGTH_LONG) .show(); } } /* * Callback for fetching current user's name, picture, uid. */ public class UserRequestListener extends BaseRequestListener { public void onComplete(final String response, final Object state) { JSONObject jsonObject; try { jsonObject = new JSONObject(response); final String picURL = jsonObject.getString("picture"); final String name = jsonObject.getString("name"); Utility.userUID = jsonObject.getString("id"); mHandler.post(new Runnable() { public void run() { mText.setText("Welcome " + name + "!"); mUserPic.setImageBitmap(Utility.getBitmap(picURL)); } }); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } /* * The Callback for notifying the application when authorization * succeeds or fails. */ public class FbAPIsAuthListener implements AuthListener { public void onAuthSucceed() { requestUserData(); } public void onAuthFail(String error) { mText.setText("Login Failed: " + error); } } /* * The Callback for notifying the application when log out * starts and finishes. */ public class FbAPIsLogoutListener implements LogoutListener { public void onLogoutBegin() { mText.setText("Logging out..."); } public void onLogoutFinish() { mText.setText("You have logged out! "); mUserPic.setImageBitmap(null); } } /* * Request user name, and picture to show on the main screen. */ public void requestUserData() { mText.setText("Fetching user name, profile pic..."); Bundle params = new Bundle(); params.putString("fields", "name, picture"); Utility.mAsyncRunner.request("me", params, new UserRequestListener()); } /** * Definition of the list adapter */ public class MainListAdapter extends BaseAdapter { private LayoutInflater mInflater; public MainListAdapter() { mInflater = LayoutInflater.from(Hackbook.this.getBaseContext()); } @Override public int getCount() { return main_items.length; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { View hView = convertView; if (convertView == null) { hView = mInflater.inflate(R.layout.main_list_item, null); ViewHolder holder = new ViewHolder(); holder.main_list_item = (TextView) hView.findViewById(R.id.main_api_item); hView.setTag(holder); } ViewHolder holder = (ViewHolder) hView.getTag(); holder.main_list_item.setText(main_items[position]); return hView; } } class ViewHolder { TextView main_list_item; } }