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.app.AlertDialog; import android.content.DialogInterface; import android.database.MatrixCursor; import android.os.Bundle; import android.os.Parcel; import android.os.Parcelable; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.SimpleCursorAdapter; import com.facebook.*; import com.facebook.model.GraphMultiResult; import com.facebook.model.GraphUser; import com.facebook.widget.FriendPickerFragment; import com.facebook.widget.PickerFragment; import com.facebook.widget.WebDialog; import java.text.SimpleDateFormat; import java.util.*; import static com.facebook.samples.rps.OpenGraphUtils.*; public class FriendActivity extends FragmentActivity { private static final String TAG = FriendActivity.class.getName(); private static final String INSTALLED = "installed"; private FriendPickerFragment friendPickerFragment; private SimpleCursorAdapter friendActivityAdapter; private ProgressBar friendActivityProgressBar; private List<ActionRow> friendActionList; private Request pendingRequest; private String friendId; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.friends_activity); FragmentManager fragmentManager = getSupportFragmentManager(); friendPickerFragment = (FriendPickerFragment) fragmentManager.findFragmentById(R.id.friend_fragment); friendPickerFragment.setShowTitleBar(false); ListView friendActivityList = (ListView) findViewById(R.id.friend_activity_list); String[] mapColumnNames = { "date", "action" }; int[] mapViewIds = { R.id.friend_action_date, R.id.friend_game_result }; friendActivityAdapter = new SimpleCursorAdapter(this, R.layout.friend_activity_row, createEmptyCursor(), mapColumnNames, mapViewIds); friendActivityList.setAdapter(friendActivityAdapter); friendActivityProgressBar = (ProgressBar) findViewById(R.id.friend_activity_progress_bar); friendPickerFragment.setOnErrorListener(new PickerFragment.OnErrorListener() { @Override public void onError(PickerFragment<?> fragment, FacebookException error) { FriendActivity.this.onError(error); } }); friendPickerFragment.setUserId("me"); friendPickerFragment.setMultiSelect(false); friendPickerFragment.setOnSelectionChangedListener(new PickerFragment.OnSelectionChangedListener() { @Override public void onSelectionChanged(PickerFragment<?> fragment) { FriendActivity.this.onFriendSelectionChanged(); } }); friendPickerFragment.setExtraFields(Arrays.asList(INSTALLED)); friendPickerFragment.setFilter(new PickerFragment.GraphObjectFilter<GraphUser>() { @Override public boolean includeItem(GraphUser graphObject) { Boolean installed = graphObject.cast(GraphUserWithInstalled.class).getInstalled(); return (installed != null) && installed.booleanValue(); } }); Button inviteButton = (Button) findViewById(R.id.invite_button); inviteButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { WebDialog.RequestsDialogBuilder builder = new WebDialog.RequestsDialogBuilder(FriendActivity.this, Session.getActiveSession()).setTitle(getString(R.string.invite_dialog_title)) .setMessage(getString(R.string.invite_dialog_message)) .setOnCompleteListener(new WebDialog.OnCompleteListener() { @Override public void onComplete(Bundle values, FacebookException error) { if (error != null) { Log.w(TAG, "Web dialog encountered an error.", error); } else { Log.i(TAG, "Web dialog complete: " + values); } } }); if (friendId != null) { builder.setTo(friendId); } builder.build().show(); } }); } @Override public void onResume() { super.onResume(); Session activeSession = Session.getActiveSession(); if (activeSession == null || !activeSession.isOpened()) { new AlertDialog.Builder(this).setTitle(R.string.feature_requires_login_title) .setMessage(R.string.feature_requires_login_message) .setPositiveButton(R.string.error_ok_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { finish(); } }).show(); } else { friendPickerFragment.loadData(false); } } private void onError(Exception error) { new AlertDialog.Builder(this).setTitle(R.string.error_dialog_title).setMessage(error.getLocalizedMessage()) .setPositiveButton(R.string.error_ok_button, null).show(); } private <T> T chooseOne(List<T> ts) { for (T t : ts) { return t; } return null; } private void onFriendSelectionChanged() { GraphUser user = chooseOne(friendPickerFragment.getSelection()); if (user != null) { friendId = user.getId(); onChooseFriend(); } else { friendActivityAdapter.changeCursor(createEmptyCursor()); } } private void onChooseFriend() { friendActivityProgressBar.setVisibility(View.VISIBLE); String throwPath = String.format("%s/%s", friendId, ThrowAction.TYPE); pendingRequest = new Request(Session.getActiveSession(), throwPath, null, HttpMethod.GET, new Request.Callback() { @Override public void onCompleted(Response response) { if (response.getRequest().equals(pendingRequest)) { FriendActivity.this.onPostExecute(response); } } }); pendingRequest.executeAsync(); } private void onPostExecute(Response response) { friendActivityProgressBar.setVisibility(View.GONE); friendActionList = createActionRows(response); updateCursor(friendActionList); } private List<ActionRow> createActionRows(Response response) { ArrayList<ActionRow> publishedItems = new ArrayList<ActionRow>(); if (response.getError() != null) { return Collections.emptyList(); } GraphMultiResult list = response.getGraphObjectAs(GraphMultiResult.class); List<PublishedThrowAction> listData = list.getData().castToListOf(PublishedThrowAction.class); for (PublishedThrowAction action : listData) { publishedItems.add(createActionRow(action)); } Collections.sort(publishedItems); return publishedItems; } private void updateCursor(Iterable<ActionRow> publishedItems) { MatrixCursor cursor = createEmptyCursor(); SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault()); int id = 0; for (ActionRow item : publishedItems) { Object[] row = new Object[3]; row[0] = id++; row[1] = dateFormat.format(item.publishDate); row[2] = item.actionText; cursor.addRow(row); } friendActivityAdapter.changeCursor(cursor); friendActivityAdapter.notifyDataSetChanged(); } private MatrixCursor createEmptyCursor() { String[] cursorColumns = { "_ID", "date", "action" }; return new MatrixCursor(cursorColumns); } private ActionRow createActionRow(PublishedThrowAction action) { String actionText = getActionText(action); Date publishDate = action.getPublishTime(); return new ActionRow(actionText, publishDate); } private String getActionText(PublishedThrowAction action) { ThrowAction actionData = action.getData(); if (actionData == null) { return ""; } GestureGraphObject playerGesture = actionData.getGesture(); GestureGraphObject opponentGesture = actionData.getOpposingGesture(); if ((playerGesture == null) || (opponentGesture == null)) { return ""; } String format = getString(R.string.action_display_format); return String.format(format, playerGesture.getTitle(), opponentGesture.getTitle()); } private static class ActionRow implements Comparable<ActionRow>, Parcelable { final String actionText; final Date publishDate; ActionRow(String actionText, Date publishDate) { this.actionText = actionText; this.publishDate = publishDate; } @Override public int compareTo(ActionRow other) { if (other == null) { return 1; } else { return publishDate.compareTo(other.publishDate); } } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel parcel, int flags) { parcel.writeString(actionText); parcel.writeLong(publishDate.getTime()); } @SuppressWarnings("unused") public final Creator<ActionRow> CREATOR = new Creator<ActionRow>() { @Override public ActionRow createFromParcel(Parcel parcel) { String actionText = parcel.readString(); Date publishDate = new Date(parcel.readLong()); return new ActionRow(actionText, publishDate); } @Override public ActionRow[] newArray(int size) { return new ActionRow[size]; } }; } }