微信小程序作业说明：
1.做作业之前首先在封面填上自己的学号和姓名，做完作业后请写上作业完成时间。
2.学习完第1-4单元之后必须完成本次作业，并请在规定时间内通过学习平台提交Word文档形式的电子作业，本次作业占形成性考核总成绩的22%。
作业内容：
学习单元2、3、4中实验部分的项目源文件压缩包。请将源码贴在以下位置，格式为先写文件名后贴代码，如下：
1、
package uk.co.senab.photup.events;
import java.util.ArrayList;
import java.util.List;
import uk.co.senab.photup.model.PhotoUpload;
public class PhotoSelectionAddedEvent {
private final List<PhotoUpload> mUploads;
public PhotoSelectionAddedEvent(List<PhotoUpload> uploads) {
mUploads = uploads;
}
public PhotoSelectionAddedEvent(PhotoUpload upload) {
mUploads = new ArrayList<PhotoUpload>();
mUploads.add(upload);
}
public List<PhotoUpload> getTargets() {
return mUploads;
}
public PhotoUpload getTarget() {
if (isSingleChange()) {
return mUploads.get(0);
} else {
throw new IllegalStateException(“Can only call this when isSingleChange returns true”);
}
}
public boolean isSingleChange() {
return mUploads.size() == 1;
}
}
2. 
package uk.co.senab.photup.events;
import java.util.ArrayList;
import java.util.List;
import uk.co.senab.photup.model.PhotoUpload;
public class PhotoSelectionRemovedEvent {
private final List<PhotoUpload> mUploads;
public PhotoSelectionRemovedEvent(List<PhotoUpload> uploads) {
mUploads = uploads;
}
public PhotoSelectionRemovedEvent(PhotoUpload upload) {
mUploads = new ArrayList<PhotoUpload>();
mUploads.add(upload);
}
public List<PhotoUpload> getTargets() {
return mUploads;
}
public PhotoUpload getTarget() {
if (isSingleChange()) {
return mUploads.get(0);
} else {
throw new IllegalStateException(“Can only call this when isSingleChange returns t
}
}
public boolean isSingleChange() {
return mUploads.size() == 1;
}
}
3
package uk.co.senab.photup.facebook;
import com.facebook.android.Facebook;
import com.facebook.android.FacebookError;
import com.facebook.android.Util;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.location.Location;
import android.os.Bundle;
import android.text.TextUtils;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import uk.co.senab.photup.model.Account;
import uk.co.senab.photup.model.Album;
import uk.co.senab.photup.model.Event;
import uk.co.senab.photup.model.FbUser;
import uk.co.senab.photup.model.Group;
import uk.co.senab.photup.model.Place;
public class FacebookRequester {
// private final Context mContext;
private final Account mAccount;
private final Facebook mFacebook;
public FacebookRequester(Account account) {
mAccount = account;
mFacebook = mAccount.getFacebook();
}
public List<Place> getPlaces(Location location, String searchQuery)
throws FacebookError, JSONException {
Bundle b = new Bundle();
b.putString(“date_format”, “U”);
b.putString(“limit”, “75”);
b.putString(“type”, “place”);
if (null != location) {
b.putString(“center”, location.getLatitude() + “,” + location.getLongitude());
}
if (TextUtils.isEmpty(searchQuery)) {
b.putString(“distance”, “2000”);
} else {
b.putString(“q”, searchQuery);
}
String response = null;
try {
response = mFacebook.request(“search”, b);
} catch (IOException e) {
e.printStackTrace();
}
if (null == response) {
return null;
}
JSONObject document = Util.parseJson(response);
JSONArray data = document.getJSONArray(“data”);
ArrayList<Place> places = new ArrayList<Place>(data.length());
JSONObject object;
for (int i = 0, z = data.length(); i < z; i++) {
try {
object = data.getJSONObject(i);
places.add(new Place(object, mAccount));
} catch (JSONException e) {
e.printStackTrace();
}
}
return places;
}
public List<FbUser> getFriends() throws FacebookError, JSONException {
Bundle b = new Bundle();
b.putString(“date_format”, “U”);
b.putString(“limit”, “3000”);
String response = null;
try {
response = mFacebook.request(“me/friends”, b);
} catch (IOException e) {
e.printStackTrace();
}
if (null == response) {
return null;
}
JSONObject document = Util.parseJson(response);
JSONArray data = document.getJSONArray(“data”);
ArrayList<FbUser> friends = new ArrayList<FbUser>(data.length() * 2);
friends.add(FbUser.getMeFromAccount(mAccount));
JSONObject object;
for (int i = 0, z = data.length(); i < z; i++) {
try {
object = data.getJSONObject(i);
friends.add(new FbUser(object, mAccount));
} catch (JSONException e) {
e.printStackTrace();
}
}
Collections.sort(friends, FbUser.getComparator());
return friends;
}
public List<Group> getGroups() throws FacebookError, JSONException {
Bundle b = new Bundle();
b.putString(“date_format”, “U”);
b.putString(“limit”, “3000”);
b.putString(“fields”, Group.GRAPH_FIELDS);
String response = null;
try {
response = mFacebook.request(“me/groups”, b);
} catch (IOException e) {
e.printStackTrace();
}
if (null == response) {
return null;
}
JSONObject document = Util.parseJson(response);
JSONArray data = document.getJSONArray(“data”);
ArrayList<Group> groups = new ArrayList<Group>(data.length() * 2);
JSONObject object;
for (int i = 0, z = data.length(); i < z; i++) {
try {
object = data.getJSONObject(i);
groups.add(new Group(object, mAccount));
} catch (JSONException e) {
e.printStackTrace();
}
}
return groups;
}
public List<Event> getEvents() throws FacebookError, JSONException {
Bundle b = new Bundle();
b.putString(“date_format”, “U”);
b.putString(“limit”, “3000”);
b.putString(“fields”, Event.GRAPH_FIELDS);
String response = null;
try {
response = mFacebook.request(“me/events”, b);
} catch (IOException e) {
e.printStackTrace();
}
if (null == response) {
return null;
}
JSONObject document = Util.parseJson(response);
JSONArray data = document.getJSONArray(“data”);
ArrayList<Event> events = new ArrayList<Event>(data.length() * 2);
JSONObject object;
for (int i = 0, z = data.length(); i < z; i++) {
try {
object = data.getJSONObject(i);
events.add(new Event(object, mAccount));
} catch (JSONException e) {
e.printStackTrace();
}
}
return events;
}
public List<Account> getAccounts() throws FacebookError, JSONException {
Bundle b = new Bundle();
b.putString(“date_format”, “U”);
b.putString(“limit”, “3000”);
String response = null;
try {
response = mFacebook.request(“me/accounts”, b);
} catch (IOException e) {
e.printStackTrace();
}
if (null == response) {
return null;
}
JSONObject document = Util.parseJson(response);
JSONArray data = document.getJSONArray(“data”);
ArrayList<Account> accounts = new ArrayList<Account>(data.length() * 2);
accounts.add(mAccount);
JSONObject object;
Account account;
for (int i = 0, z = data.length(); i < z; i++) {
try {
object = data.getJSONObject(i);
account = new Account(object);
if (account.hasAccessToken()) {
accounts.add(account);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
return accounts;
}
public List<Album> getUploadableAlbums() throws FacebookError, JSONException {
Bundle b = new Bundle();
b.putString(“date_format”, “U”);
b.putString(“limit”, “3000”);
String response = null;
try {
response = mFacebook.request(“me/albums”, b);
} catch (IOException e) {
e.printStackTrace();
}
if (null == response) {
return null;
}
JSONObject document = Util.parseJson(response);
JSONArray data = document.getJSONArray(“data”);
ArrayList<Album> albums = new ArrayList<Album>(data.length());
JSONObject object;
for (int i = 0, z = data.length(); i < z; i++) {
try {
object = data.getJSONObject(i);
Album album = new Album(object, mAccount);
if (album.canUpload()) {
albums.add(album);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
return albums;
}
public String createNewAlbum(String albumName, String description, String privacy) {
Bundle b = new Bundle();
b.putString(“name”, albumName);
if (!TextUtils.isEmpty(description)) {
b.putString(“message”, description);
}
if (!TextUtils.isEmpty(privacy)) {
try {
JSONObject object = new JSONObject();
object.put(“value”, privacy);
b.putString(“privacy”, object.toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
String response = null;
try {
response = mFacebook.request(“me/albums”, b, “POST”);
} catch (IOException e) {
e.printStackTrace();
}
if (null == response) {
return null;
}
try {
JSONObject document = Util.parseJson(response);
return document.getString(“id”);
} catch (FacebookError e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
}
4
package uk.co.senab.photup.facebook;
import com.facebook.android.Facebook;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
import uk.co.senab.photup.Constants;
import uk.co.senab.photup.Flags;
/**
* A utility class for storing and retrieving Facebook session data.
*
* @author yariv
*/
public class Session {
static final String TOKEN = “access_token”;
static final String EXPIRES = “expires_in”;
static final String KEY = “facebook-session”;
static final String UID = “uid”;
static final String NAME = “name”;
// The Facebook object
private Facebook fb;
// The user id of the logged in user
private String uid;
// The user name of the logged in user
private String name;
/**
* Constructor
*/
public Session(Facebook fb, String uid, String name) {
this.fb = fb;
this.uid = uid;
this.name = name;
}
/**
* Returns the Facebook object
*/
public Facebook getFb() {
return fb;
}
/**
* Returns the session user’s id
*/
public String getUid() {
return uid;
}
/**
* Returns the session user’s name
*/
public String getName() {
return name;
}
/**
* Stores the session data on disk.
*/
public void save(Context context) {
if (Flags.DEBUG) {
Log.d(getClass().getSimpleName(), “Saving Session! Expires: ” + fb.getAccessExpires());
}
Editor editor = context.getSharedPreferences(KEY, Context.MODE_PRIVATE).edit();
editor.putString(TOKEN, fb.getAccessToken());
editor.putLong(EXPIRES, fb.getAccessExpires());
editor.putString(UID, uid);
editor.putString(NAME, name);
editor.commit();
}
/**
* Loads the session data from disk.
*/
public static Session restore(Context context) {
SharedPreferences prefs = context.getSharedPreferences(KEY, Context.MODE_PRIVATE);
Facebook fb = new Facebook(Constants.FACEBOOK_APP_ID);
fb.setAccessToken(prefs.getString(TOKEN, null));
fb.setAccessExpires(prefs.getLong(EXPIRES, 0));
String uid = prefs.getString(UID, null);
String name = prefs.getString(NAME, null);
if (fb.isSessionValid() && uid != null && name != null) {
return new Session(fb, uid, name);
}
return null;
}
/**
* Clears the saved session data.
*/
public static void clearSavedSession(Context context) {
Editor editor = context.getSharedPreferences(KEY, Context.MODE_PRIVATE).edit();
editor.clear().commit();
}
}
