[V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/AppDatabase.java" isMerged="true" package com.example.socialmediaapp.database; import android.content.Context; import androidx.room.Database; import androidx.room.Room; import androidx.room.RoomDatabase; import androidx.room.TypeConverters; import com.example.socialmediaapp.database.dao.CommentDao; import com.example.socialmediaapp.database.dao.LikeDao; import com.example.socialmediaapp.database.dao.PostDao; import com.example.socialmediaapp.database.dao.UserDao; import com.example.socialmediaapp.database.entity.Comment; import com.example.socialmediaapp.database.entity.Like; import com.example.socialmediaapp.database.entity.Post; import com.example.socialmediaapp.database.entity.User; import com.example.socialmediaapp.utils.DateConverter; @Database(entities = {User.class, Post.class, Comment.class, Like.class}, version = 1, exportSchema = false) @TypeConverters({DateConverter.class}) public abstract class AppDatabase extends RoomDatabase { private static final String DATABASE_NAME = "social_media_db"; private static AppDatabase instance; public static synchronized AppDatabase getInstance(Context context) { if (instance == null) { instance = Room.databaseBuilder( context.getApplicationContext(), AppDatabase.class, DATABASE_NAME ).fallbackToDestructiveMigration().build(); } return instance; } public abstract UserDao userDao(); public abstract PostDao postDao(); public abstract CommentDao commentDao(); public abstract LikeDao likeDao(); } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/entity/User.java" isMerged="true" package com.example.socialmediaapp.database.entity; import androidx.room.Entity; import androidx.room.PrimaryKey; @Entity(tableName = "users") public class User { @PrimaryKey(autoGenerate = true) private long id; private String username; private String avatarUrl; public User(String username, String avatarUrl) { this.username = username; this.avatarUrl = avatarUrl; } public long getId() { return id; } public void setId(long id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getAvatarUrl() { return avatarUrl; } public void setAvatarUrl(String avatarUrl) { this.avatarUrl = avatarUrl; } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/entity/Post.java" isMerged="true" package com.example.socialmediaapp.database.entity; import androidx.room.Entity; import androidx.room.ForeignKey; import androidx.room.Index; import androidx.room.PrimaryKey; import java.util.Date; @Entity(tableName = "posts", foreignKeys = @ForeignKey(entity = User.class, parentColumns = "id", childColumns = "userId", onDelete = ForeignKey.CASCADE), indices = {@Index("userId")}) public class Post { @PrimaryKey(autoGenerate = true) private long id; private long userId; private String content; private String imageUrl; private Date createdAt; public Post(long userId, String content, String imageUrl) { this.userId = userId; this.content = content; this.imageUrl = imageUrl; this.createdAt = new Date(); } public long getId() { return id; } public void setId(long id) { this.id = id; } public long getUserId() { return userId; } public void setUserId(long userId) { this.userId = userId; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public String getImageUrl() { return imageUrl; } public void setImageUrl(String imageUrl) { this.imageUrl = imageUrl; } public Date getCreatedAt() { return createdAt; } public void setCreatedAt(Date createdAt) { this.createdAt = createdAt; } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/entity/Comment.java" isMerged="true" package com.example.socialmediaapp.database.entity; import androidx.room.Entity; import androidx.room.ForeignKey; import androidx.room.Index; import androidx.room.PrimaryKey; import java.util.Date; @Entity(tableName = "comments", foreignKeys = { @ForeignKey(entity = User.class, parentColumns = "id", childColumns = "userId", onDelete = ForeignKey.CASCADE), @ForeignKey(entity = Post.class, parentColumns = "id", childColumns = "postId", onDelete = ForeignKey.CASCADE) }, indices = {@Index("userId"), @Index("postId")}) public class Comment { @PrimaryKey(autoGenerate = true) private long id; private long userId; private long postId; private String content; private Date createdAt; public Comment(long userId, long postId, String content) { this.userId = userId; this.postId = postId; this.content = content; this.createdAt = new Date(); } public long getId() { return id; } public void setId(long id) { this.id = id; } public long getUserId() { return userId; } public void setUserId(long userId) { this.userId = userId; } public long getPostId() { return postId; } public void setPostId(long postId) { this.postId = postId; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public Date getCreatedAt() { return createdAt; } public void setCreatedAt(Date createdAt) { this.createdAt = createdAt; } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/entity/Like.java" isMerged="true" package com.example.socialmediaapp.database.entity; import androidx.room.Entity; import androidx.room.ForeignKey; import androidx.room.Index; import androidx.room.PrimaryKey; import java.util.Date; @Entity(tableName = "likes", foreignKeys = { @ForeignKey(entity = User.class, parentColumns = "id", childColumns = "userId", onDelete = ForeignKey.CASCADE), @ForeignKey(entity = Post.class, parentColumns = "id", childColumns = "postId", onDelete = ForeignKey.CASCADE) }, indices = {@Index("userId"), @Index("postId")}) public class Like { @PrimaryKey(autoGenerate = true) private long id; private long userId; private long postId; private Date createdAt; public Like(long userId, long postId) { this.userId = userId; this.postId = postId; this.createdAt = new Date(); } public long getId() { return id; } public void setId(long id) { this.id = id; } public long getUserId() { return userId; } public void setUserId(long userId) { this.userId = userId; } public long getPostId() { return postId; } public void setPostId(long postId) { this.postId = postId; } public Date getCreatedAt() { return createdAt; } public void setCreatedAt(Date createdAt) { this.createdAt = createdAt; } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/dao/UserDao.java" isMerged="true" package com.example.socialmediaapp.database.dao; import androidx.lifecycle.LiveData; import androidx.room.Dao; import androidx.room.Insert; import androidx.room.Query; import androidx.room.Update; import com.example.socialmediaapp.database.entity.User; import java.util.List; @Dao public interface UserDao { @Insert long insert(User user); @Update void update(User user); @Query("SELECT * FROM users WHERE id = :id") LiveData getUserById(long id); @Query("SELECT * FROM users") LiveData> getAllUsers(); } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/dao/PostDao.java" isMerged="true" package com.example.socialmediaapp.database.dao; import androidx.lifecycle.LiveData; import androidx.room.Dao; import androidx.room.Insert; import androidx.room.Query; import androidx.room.Transaction; import com.example.socialmediaapp.database.entity.Post; import com.example.socialmediaapp.model.PostWithUserAndStats; import java.util.List; @Dao public interface PostDao { @Insert long insert(Post post); @Query("SELECT * FROM posts ORDER BY createdAt DESC") LiveData> getAllPosts(); @Transaction @Query("SELECT p.*, u.username, u.avatarUrl, " + "(SELECT COUNT(*) FROM likes WHERE postId = p.id) as likeCount, " + "(SELECT COUNT(*) FROM comments WHERE postId = p.id) as commentCount " + "FROM posts p INNER JOIN users u ON p.userId = u.id " + "ORDER BY p.createdAt DESC") LiveData> getPostsWithUserAndStats(); } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/dao/CommentDao.java" isMerged="true" package com.example.socialmediaapp.database.dao; import androidx.lifecycle.LiveData; import androidx.room.Dao; import androidx.room.Insert; import androidx.room.Query; import androidx.room.Transaction; import com.example.socialmediaapp.database.entity.Comment; import com.example.socialmediaapp.model.CommentWithUser; import java.util.List; @Dao public interface CommentDao { @Insert long insert(Comment comment); @Transaction @Query("SELECT c.*, u.username, u.avatarUrl FROM comments c " + "INNER JOIN users u ON c.userId = u.id " + "WHERE c.postId = :postId " + "ORDER BY c.createdAt ASC") LiveData> getCommentsForPost(long postId); } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/database/dao/LikeDao.java" isMerged="true" package com.example.socialmediaapp.database.dao; import androidx.lifecycle.LiveData; import androidx.room.Dao; import androidx.room.Delete; import androidx.room.Insert; import androidx.room.Query; import com.example.socialmediaapp.database.entity.Like; @Dao public interface LikeDao { @Insert long insert(Like like); @Delete void delete(Like like); @Query("SELECT * FROM likes WHERE userId = :userId AND postId = :postId") LiveData getLikeByUserAndPost(long userId, long postId); @Query("SELECT COUNT(*) FROM likes WHERE postId = :postId") LiveData getLikeCountForPost(long postId); } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/model/PostWithUserAndStats.java" isMerged="true" package com.example.socialmediaapp.model; import com.example.socialmediaapp.database.entity.Post; import java.util.Date; public class PostWithUserAndStats { private long id; private long userId; private String content; private String imageUrl; private Date createdAt; private String username; private String avatarUrl; private int likeCount; private int commentCount; private boolean isLikedByCurrentUser; public long getId() { return id; } public void setId(long id) { this.id = id; } public long getUserId() { return userId; } public void setUserId(long userId) { this.userId = userId; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public String getImageUrl() { return imageUrl; } public void setImageUrl(String imageUrl) { this.imageUrl = imageUrl; } public Date getCreatedAt() { return createdAt; } public void setCreatedAt(Date createdAt) { this.createdAt = createdAt; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getAvatarUrl() { return avatarUrl; } public void setAvatarUrl(String avatarUrl) { this.avatarUrl = avatarUrl; } public int getLikeCount() { return likeCount; } public void setLikeCount(int likeCount) { this.likeCount = likeCount; } public int getCommentCount() { return commentCount; } public void setCommentCount(int commentCount) { this.commentCount = commentCount; } public boolean isLikedByCurrentUser() { return isLikedByCurrentUser; } public void setLikedByCurrentUser(boolean likedByCurrentUser) { isLikedByCurrentUser = likedByCurrentUser; } public Post toPost() { Post post = new Post(userId, content, imageUrl); post.setId(id); post.setCreatedAt(createdAt); return post; } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/model/CommentWithUser.java" isMerged="true" package com.example.socialmediaapp.model; import java.util.Date; public class CommentWithUser { private long id; private long userId; private long postId; private String content; private Date createdAt; private String username; private String avatarUrl; public long getId() { return id; } public void setId(long id) { this.id = id; } public long getUserId() { return userId; } public void setUserId(long userId) { this.userId = userId; } public long getPostId() { return postId; } public void setPostId(long postId) { this.postId = postId; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public Date getCreatedAt() { return createdAt; } public void setCreatedAt(Date createdAt) { this.createdAt = createdAt; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getAvatarUrl() { return avatarUrl; } public void setAvatarUrl(String avatarUrl) { this.avatarUrl = avatarUrl; } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/utils/DateConverter.java" isMerged="true" package com.example.socialmediaapp.utils; import androidx.room.TypeConverter; import java.util.Date; public class DateConverter { @TypeConverter public static Date fromTimestamp(Long value) { return value == null ? null : new Date(value); } @TypeConverter public static Long dateToTimestamp(Date date) { return date == null ? null : date.getTime(); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/utils/SessionManager.java" isMerged="true" package com.example.socialmediaapp.utils; import android.content.Context; import android.content.SharedPreferences; public class SessionManager { private static final String PREF_NAME = "SocialMediaAppSession"; private static final String KEY_USER_ID = "userId"; private static final String KEY_USERNAME = "username"; private static final String KEY_IS_LOGGED_IN = "isLoggedIn"; private SharedPreferences pref; private SharedPreferences.Editor editor; private Context context; public SessionManager(Context context) { this.context = context; pref = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE); editor = pref.edit(); } public void createLoginSession(long userId, String username) { editor.putBoolean(KEY_IS_LOGGED_IN, true); editor.putLong(KEY_USER_ID, userId); editor.putString(KEY_USERNAME, username); editor.commit(); } public boolean isLoggedIn() { return pref.getBoolean(KEY_IS_LOGGED_IN, false); } public long getUserId() { return pref.getLong(KEY_USER_ID, -1); } public String getUsername() { return pref.getString(KEY_USERNAME, null); } public void logout() { editor.clear(); editor.commit(); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/repository/UserRepository.java" isMerged="true" package com.example.socialmediaapp.repository; import android.app.Application; import androidx.lifecycle.LiveData; import com.example.socialmediaapp.database.AppDatabase; import com.example.socialmediaapp.database.dao.UserDao; import com.example.socialmediaapp.database.entity.User; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class UserRepository { private UserDao userDao; private LiveData> allUsers; private ExecutorService executorService; public UserRepository(Application application) { AppDatabase db = AppDatabase.getInstance(application); userDao = db.userDao(); allUsers = userDao.getAllUsers(); executorService = Executors.newSingleThreadExecutor(); } public LiveData> getAllUsers() { return allUsers; } public LiveData getUserById(long id) { return userDao.getUserById(id); } public void insert(User user, InsertCallback callback) { executorService.execute(() -> { long id = userDao.insert(user); callback.onUserInserted(id); }); } public void update(User user) { executorService.execute(() -> { userDao.update(user); }); } public interface InsertCallback { void onUserInserted(long userId); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/repository/PostRepository.java" isMerged="true" package com.example.socialmediaapp.repository; import android.app.Application; import androidx.lifecycle.LiveData; import com.example.socialmediaapp.database.AppDatabase; import com.example.socialmediaapp.database.dao.PostDao; import com.example.socialmediaapp.database.entity.Post; import com.example.socialmediaapp.model.PostWithUserAndStats; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class PostRepository { private PostDao postDao; private LiveData> allPostsWithUserAndStats; private ExecutorService executorService; public PostRepository(Application application) { AppDatabase db = AppDatabase.getInstance(application); postDao = db.postDao(); allPostsWithUserAndStats = postDao.getPostsWithUserAndStats(); executorService = Executors.newSingleThreadExecutor(); } public LiveData> getAllPostsWithUserAndStats() { return allPostsWithUserAndStats; } public void insert(Post post, InsertCallback callback) { executorService.execute(() -> { long id = postDao.insert(post); callback.onPostInserted(id); }); } public interface InsertCallback { void onPostInserted(long postId); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/repository/CommentRepository.java" isMerged="true" package com.example.socialmediaapp.repository; import android.app.Application; import androidx.lifecycle.LiveData; import com.example.socialmediaapp.database.AppDatabase; import com.example.socialmediaapp.database.dao.CommentDao; import com.example.socialmediaapp.database.entity.Comment; import com.example.socialmediaapp.model.CommentWithUser; import java.util.List; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class CommentRepository { private CommentDao commentDao; private ExecutorService executorService; public CommentRepository(Application application) { AppDatabase db = AppDatabase.getInstance(application); commentDao = db.commentDao(); executorService = Executors.newSingleThreadExecutor(); } public LiveData> getCommentsForPost(long postId) { return commentDao.getCommentsForPost(postId); } public void insert(Comment comment, InsertCallback callback) { executorService.execute(() -> { long id = commentDao.insert(comment); callback.onCommentInserted(id); }); } public interface InsertCallback { void onCommentInserted(long commentId); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/repository/LikeRepository.java" isMerged="true" package com.example.socialmediaapp.repository; import android.app.Application; import androidx.lifecycle.LiveData; import com.example.socialmediaapp.database.AppDatabase; import com.example.socialmediaapp.database.dao.LikeDao; import com.example.socialmediaapp.database.entity.Like; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class LikeRepository { private LikeDao likeDao; private ExecutorService executorService; public LikeRepository(Application application) { AppDatabase db = AppDatabase.getInstance(application); likeDao = db.likeDao(); executorService = Executors.newSingleThreadExecutor(); } public LiveData getLikeByUserAndPost(long userId, long postId) { return likeDao.getLikeByUserAndPost(userId, postId); } public LiveData getLikeCountForPost(long postId) { return likeDao.getLikeCountForPost(postId); } public void insert(Like like) { executorService.execute(() -> { likeDao.insert(like); }); } public void delete(Like like) { executorService.execute(() -> { likeDao.delete(like); }); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/viewmodel/PostViewModel.java" isMerged="true" package com.example.socialmediaapp.viewmodel; import android.app.Application; import androidx.annotation.NonNull; import androidx.lifecycle.AndroidViewModel; import androidx.lifecycle.LiveData; import androidx.lifecycle.MutableLiveData; import com.example.socialmediaapp.database.entity.Post; import com.example.socialmediaapp.model.PostWithUserAndStats; import com.example.socialmediaapp.repository.PostRepository; import com.example.socialmediaapp.utils.SessionManager; import java.util.List; public class PostViewModel extends AndroidViewModel { private PostRepository repository; private LiveData> allPostsWithUserAndStats; private MutableLiveData toastMessage = new MutableLiveData<>(); private SessionManager sessionManager; public PostViewModel(@NonNull Application application) { super(application); repository = new PostRepository(application); allPostsWithUserAndStats = repository.getAllPostsWithUserAndStats(); sessionManager = new SessionManager(application); } public LiveData> getAllPostsWithUserAndStats() { return allPostsWithUserAndStats; } public LiveData getToastMessage() { return toastMessage; } public void insert(String content, String imageUrl) { if (!sessionManager.isLoggedIn()) { toastMessage.setValue("Bạn cần đăng nhập để đăng bài"); return; } if (content == null || content.trim().isEmpty()) { toastMessage.setValue("Nội dung không được để trống"); return; } long userId = sessionManager.getUserId(); Post post = new Post(userId, content, imageUrl); repository.insert(post, postId -> { toastMessage.postValue("Đăng bài thành công"); }); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/viewmodel/CommentViewModel.java" isMerged="true" package com.example.socialmediaapp.viewmodel; import android.app.Application; import androidx.annotation.NonNull; import androidx.lifecycle.AndroidViewModel; import androidx.lifecycle.LiveData; import androidx.lifecycle.MutableLiveData; import com.example.socialmediaapp.database.entity.Comment; import com.example.socialmediaapp.model.CommentWithUser; import com.example.socialmediaapp.repository.CommentRepository; import com.example.socialmediaapp.utils.SessionManager; import java.util.List; public class CommentViewModel extends AndroidViewModel { private CommentRepository repository; private MutableLiveData toastMessage = new MutableLiveData<>(); private SessionManager sessionManager; public CommentViewModel(@NonNull Application application) { super(application); repository = new CommentRepository(application); sessionManager = new SessionManager(application); } public LiveData> getCommentsForPost(long postId) { return repository.getCommentsForPost(postId); } public LiveData getToastMessage() { return toastMessage; } public void insert(long postId, String content) { if (!sessionManager.isLoggedIn()) { toastMessage.setValue("Bạn cần đăng nhập để bình luận"); return; } if (content == null || content.trim().isEmpty()) { toastMessage.setValue("Nội dung bình luận không được để trống"); return; } long userId = sessionManager.getUserId(); Comment comment = new Comment(userId, postId, content); repository.insert(comment, commentId -> { toastMessage.postValue("Bình luận thành công"); }); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/viewmodel/LikeViewModel.java" isMerged="true" package com.example.socialmediaapp.viewmodel; import android.app.Application; import androidx.annotation.NonNull; import androidx.lifecycle.AndroidViewModel; import androidx.lifecycle.LiveData; import androidx.lifecycle.MutableLiveData; import com.example.socialmediaapp.database.entity.Like; import com.example.socialmediaapp.repository.LikeRepository; import com.example.socialmediaapp.utils.SessionManager; public class LikeViewModel extends AndroidViewModel { private LikeRepository repository; private MutableLiveData toastMessage = new MutableLiveData<>(); private SessionManager sessionManager; public LikeViewModel(@NonNull Application application) { super(application); repository = new LikeRepository(application); sessionManager = new SessionManager(application); } public LiveData getLikeByUserAndPost(long postId) { long userId = sessionManager.getUserId(); return repository.getLikeByUserAndPost(userId, postId); } public LiveData getLikeCountForPost(long postId) { return repository.getLikeCountForPost(postId); } public LiveData getToastMessage() { return toastMessage; } public void toggleLike(long postId) { if (!sessionManager.isLoggedIn()) { toastMessage.setValue("Bạn cần đăng nhập để thích bài viết"); return; } long userId = sessionManager.getUserId(); LiveData existingLike = repository.getLikeByUserAndPost(userId, postId); if (existingLike.getValue() != null) { repository.delete(existingLike.getValue()); } else { Like like = new Like(userId, postId); repository.insert(like); } } } [V0_FILE]xml:file="app/src/main/res/layout/item_create_post.xml" isMerged="true" [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/adapter/PostAdapter.java" isMerged="true" package com.example.socialmediaapp.adapter; import android.content.Context; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.core.content.ContextCompat; import androidx.lifecycle.LifecycleOwner; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import com.bumptech.glide.Glide; import com.example.socialmediaapp.R; import com.example.socialmediaapp.model.PostWithUserAndStats; import com.example.socialmediaapp.viewmodel.CommentViewModel; import com.example.socialmediaapp.viewmodel.LikeViewModel; import java.util.ArrayList; import java.util.List; import de.hdodenhof.circleimageview.CircleImageView; public class PostAdapter extends RecyclerView.Adapter { private List posts = new ArrayList<>(); private Context context; private CommentViewModel commentViewModel; private LikeViewModel likeViewModel; private LifecycleOwner lifecycleOwner; public PostAdapter(Context context, CommentViewModel commentViewModel, LikeViewModel likeViewModel, LifecycleOwner lifecycleOwner) { this.context = context; this.commentViewModel = commentViewModel; this.likeViewModel = likeViewModel; this.lifecycleOwner = lifecycleOwner; } @NonNull @Override public PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_post, parent, false); return new PostViewHolder(view); } @Override public void onBindViewHolder(@NonNull PostViewHolder holder, int position) { PostWithUserAndStats post = posts.get(position); // Set user info holder.tvUsername.setText(post.getUsername()); if (!TextUtils.isEmpty(post.getAvatarUrl())) { Glide.with(context).load(post.getAvatarUrl()).into(holder.ivUserAvatar); } // Set post content holder.tvPostContent.setText(post.getContent()); // Set post image if available if (!TextUtils.isEmpty(post.getImageUrl())) { holder.ivPostImage.setVisibility(View.VISIBLE); Glide.with(context).load(post.getImageUrl()).into(holder.ivPostImage); } else { holder.ivPostImage.setVisibility(View.GONE); } // Set like count holder.tvLikeCount.setText(String.valueOf(post.getLikeCount())); // Set comment count holder.tvCommentCount.setText(String.valueOf(post.getCommentCount())); // Set up comment recycler view CommentAdapter commentAdapter = new CommentAdapter(context); holder.rvComments.setLayoutManager(new LinearLayoutManager(context)); holder.rvComments.setAdapter(commentAdapter); // Observe comments for this post commentViewModel.getCommentsForPost(post.getId()).observe(lifecycleOwner, comments -> { if (comments != null && !comments.isEmpty()) { holder.rvComments.setVisibility(View.VISIBLE); commentAdapter.setComments(comments); } else { holder.rvComments.setVisibility(View.GONE); } }); // Observe like status for current user likeViewModel.getLikeByUserAndPost(post.getId()).observe(lifecycleOwner, like -> { if (like != null) { holder.ivLike.setColorFilter(ContextCompat.getColor(context, R.color.colorLiked)); post.setLikedByCurrentUser(true); } else { holder.ivLike.setColorFilter(ContextCompat.getColor(context, R.color.colorNotLiked)); post.setLikedByCurrentUser(false); } }); // Set up like button click holder.layoutLike.setOnClickListener(v -> { likeViewModel.toggleLike(post.getId()); }); // Set up comment button click holder.layoutComment.setOnClickListener(v -> { holder.etComment.requestFocus(); }); // Set up send comment button holder.btnSendComment.setOnClickListener(v -> { String commentContent = holder.etComment.getText().toString().trim(); if (!TextUtils.isEmpty(commentContent)) { commentViewModel.insert(post.getId(), commentContent); holder.etComment.setText(""); } }); } @Override public int getItemCount() { return posts.size(); } public void setPosts(List posts) { this.posts = posts; notifyDataSetChanged(); } static class PostViewHolder extends RecyclerView.ViewHolder { CircleImageView ivUserAvatar, ivCommentUserAvatar; TextView tvUsername, tvPostContent, tvLikeCount, tvCommentCount; ImageView ivPostImage, ivLike; LinearLayout layoutLike, layoutComment, layoutShare; RecyclerView rvComments; EditText etComment; ImageButton btnSendComment; public PostViewHolder(@NonNull View itemView) { super(itemView); ivUserAvatar = itemView.findViewById(R.id.ivUserAvatar); ivCommentUserAvatar = itemView.findViewById(R.id.ivCommentUserAvatar); tvUsername = itemView.findViewById(R.id.tvUsername); tvPostContent = itemView.findViewById(R.id.tvPostContent); tvLikeCount = itemView.findViewById(R.id.tvLikeCount); tvCommentCount = itemView.findViewById(R.id.tvCommentCount); ivPostImage = itemView.findViewById(R.id.ivPostImage); ivLike = itemView.findViewById(R.id.ivLike); layoutLike = itemView.findViewById(R.id.layoutLike); layoutComment = itemView.findViewById(R.id.layoutComment); layoutShare = itemView.findViewById(R.id.layoutShare); rvComments = itemView.findViewById(R.id.rvComments); etComment = itemView.findViewById(R.id.etComment); btnSendComment = itemView.findViewById(R.id.btnSendComment); } } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/adapter/CommentAdapter.java" isMerged="true" package com.example.socialmediaapp.adapter; import android.content.Context; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.recyclerview.widget.RecyclerView; import com.bumptech.glide.Glide; import com.example.socialmediaapp.R; import com.example.socialmediaapp.model.CommentWithUser; import java.util.ArrayList; import java.util.List; import de.hdodenhof.circleimageview.CircleImageView; public class CommentAdapter extends RecyclerView.Adapter { private List comments = new ArrayList<>(); private Context context; public CommentAdapter(Context context) { this.context = context; } @NonNull @Override public CommentViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_comment, parent, false); return new CommentViewHolder(view); } @Override public void onBindViewHolder(@NonNull CommentViewHolder holder, int position) { CommentWithUser comment = comments.get(position); holder.tvCommentUsername.setText(comment.getUsername()); holder.tvCommentContent.setText(comment.getContent()); if (!TextUtils.isEmpty(comment.getAvatarUrl())) { Glide.with(context).load(comment.getAvatarUrl()).into(holder.ivCom { Glide.with(context).load(comment.getAvatarUrl()).into(holder.ivCommentUserAvatar); } } @Override public int getItemCount() { return comments.size(); } public void setComments(List comments) { this.comments = comments; notifyDataSetChanged(); } static class CommentViewHolder extends RecyclerView.ViewHolder { CircleImageView ivCommentUserAvatar; TextView tvCommentUsername, tvCommentContent; public CommentViewHolder(@NonNull View itemView) { super(itemView); ivCommentUserAvatar = itemView.findViewById(R.id.ivCommentUserAvatar); tvCommentUsername = itemView.findViewById(R.id.tvCommentUsername); tvCommentContent = itemView.findViewById(R.id.tvCommentContent); } } } [V0_FILE]xml:file="app/src/main/res/drawable/ic_create.xml" isMerged="true" [V0_FILE]xml:file="app/src/main/res/drawable/ic_notification.xml" isMerged="true" [V0_FILE]xml:file="app/src/main/res/drawable/ic_profile.xml" isMerged="true" [V0_FILE]groovy:file="app/build.gradle" isMerged="true" plugins { id 'com.android.application' } android { compileSdk 33 defaultConfig { applicationId "com.example.socialmediaapp" minSdk 21 targetSdk 33 versionCode 1 versionName "1.0" testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' } } compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } buildFeatures { viewBinding true } } dependencies { implementation 'androidx.appcompat:appcompat:1.6.1' implementation 'com.google.android.material:material:1.9.0' implementation 'androidx.constraintlayout:constraintlayout:2.1.4' // Room components implementation "androidx.room:room-runtime:2.5.2" annotationProcessor "androidx.room:room-compiler:2.5.2" implementation "androidx.room:room-ktx:2.5.2" // Lifecycle components implementation "androidx.lifecycle:lifecycle-viewmodel:2.6.1" implementation "androidx.lifecycle:lifecycle-livedata:2.6.1" implementation "androidx.lifecycle:lifecycle-common-java8:2.6.1" // Glide for image loading implementation 'com.github.bumptech.glide:glide:4.15.1' annotationProcessor 'com.github.bumptech.glide:compiler:4.15.1' // CircleImageView implementation 'de.hdodenhof:circleimageview:3.1.0' // Testing testImplementation 'junit:junit:4.13.2' androidTestImplementation 'androidx.test.ext:junit:1.1.5' androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1' } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/DatabaseHelper.java" isMerged="true" package com.example.socialmediaapp; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import java.util.ArrayList; import java.util.List; public class DatabaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = "social_media.db"; private static final int DATABASE_VERSION = 1; // Tên bảng public static final String TABLE_USERS = "users"; public static final String TABLE_POSTS = "posts"; public static final String TABLE_COMMENTS = "comments"; public static final String TABLE_LIKES = "likes"; // Cột chung public static final String COLUMN_ID = "id"; public static final String COLUMN_CREATED_AT = "created_at"; // Cột bảng users public static final String COLUMN_USERNAME = "username"; public static final String COLUMN_AVATAR_URL = "avatar_url"; // Cột bảng posts public static final String COLUMN_USER_ID = "user_id"; public static final String COLUMN_CONTENT = "content"; public static final String COLUMN_IMAGE_URL = "image_url"; // Cột bảng comments public static final String COLUMN_POST_ID = "post_id"; // Cột bảng likes // Sử dụng COLUMN_USER_ID và COLUMN_POST_ID // SQL tạo bảng private static final String CREATE_TABLE_USERS = "CREATE TABLE " + TABLE_USERS + "(" + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + COLUMN_USERNAME + " TEXT," + COLUMN_AVATAR_URL + " TEXT," + COLUMN_CREATED_AT + " INTEGER" + ")"; private static final String CREATE_TABLE_POSTS = "CREATE TABLE " + TABLE_POSTS + "(" + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + COLUMN_USER_ID + " INTEGER," + COLUMN_CONTENT + " TEXT," + COLUMN_IMAGE_URL + " TEXT," + COLUMN_CREATED_AT + " INTEGER" + ")"; private static final String CREATE_TABLE_COMMENTS = "CREATE TABLE " + TABLE_COMMENTS + "(" + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + COLUMN_USER_ID + " INTEGER," + COLUMN_POST_ID + " INTEGER," + COLUMN_CONTENT + " TEXT," + COLUMN_CREATED_AT + " INTEGER" + ")"; private static final String CREATE_TABLE_LIKES = "CREATE TABLE " + TABLE_LIKES + "(" + COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + COLUMN_USER_ID + " INTEGER," + COLUMN_POST_ID + " INTEGER," + COLUMN_CREATED_AT + " INTEGER," + "UNIQUE(" + COLUMN_USER_ID + "," + COLUMN_POST_ID + ")" + ")"; public DatabaseHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { db.execSQL(CREATE_TABLE_USERS); db.execSQL(CREATE_TABLE_POSTS); db.execSQL(CREATE_TABLE_COMMENTS); db.execSQL(CREATE_TABLE_LIKES); // Thêm dữ liệu mẫu insertSampleData(db); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { db.execSQL("DROP TABLE IF EXISTS " + TABLE_LIKES); db.execSQL("DROP TABLE IF EXISTS " + TABLE_COMMENTS); db.execSQL("DROP TABLE IF EXISTS " + TABLE_POSTS); db.execSQL("DROP TABLE IF EXISTS " + TABLE_USERS); onCreate(db); } private void insertSampleData(SQLiteDatabase db) { // Thêm người dùng mẫu ContentValues userValues1 = new ContentValues(); userValues1.put(COLUMN_USERNAME, "user1"); userValues1.put(COLUMN_AVATAR_URL, ""); userValues1.put(COLUMN_CREATED_AT, System.currentTimeMillis()); long userId1 = db.insert(TABLE_USERS, null, userValues1); ContentValues userValues2 = new ContentValues(); userValues2.put(COLUMN_USERNAME, "user2"); userValues2.put(COLUMN_AVATAR_URL, ""); userValues2.put(COLUMN_CREATED_AT, System.currentTimeMillis()); long userId2 = db.insert(TABLE_USERS, null, userValues2); // Thêm bài đăng mẫu ContentValues postValues1 = new ContentValues(); postValues1.put(COLUMN_USER_ID, userId1); postValues1.put(COLUMN_CONTENT, "KPI hôm nayyy... 😊😊😊"); postValues1.put(COLUMN_IMAGE_URL, "sample_image_url_1"); postValues1.put(COLUMN_CREATED_AT, System.currentTimeMillis()); long postId1 = db.insert(TABLE_POSTS, null, postValues1); ContentValues postValues2 = new ContentValues(); postValues2.put(COLUMN_USER_ID, userId2); postValues2.put(COLUMN_CONTENT, "Xin tips về chiêu kiếm gì vậy mọi người?"); postValues2.put(COLUMN_IMAGE_URL, ""); postValues2.put(COLUMN_CREATED_AT, System.currentTimeMillis() - 3600000); long postId2 = db.insert(TABLE_POSTS, null, postValues2); // Thêm bình luận mẫu ContentValues commentValues1 = new ContentValues(); commentValues1.put(COLUMN_USER_ID, userId2); commentValues1.put(COLUMN_POST_ID, postId1); commentValues1.put(COLUMN_CONTENT, "Chúc mừng bạn!"); commentValues1.put(COLUMN_CREATED_AT, System.currentTimeMillis()); db.insert(TABLE_COMMENTS, null, commentValues1); // Thêm like mẫu ContentValues likeValues1 = new ContentValues(); likeValues1.put(COLUMN_USER_ID, userId2); likeValues1.put(COLUMN_POST_ID, postId1); likeValues1.put(COLUMN_CREATED_AT, System.currentTimeMillis()); db.insert(TABLE_LIKES, null, likeValues1); } // Phương thức thêm người dùng mới public long addUser(String username, String avatarUrl) { SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(COLUMN_USERNAME, username); values.put(COLUMN_AVATAR_URL, avatarUrl); values.put(COLUMN_CREATED_AT, System.currentTimeMillis()); long id = db.insert(TABLE_USERS, null, values); db.close(); return id; } // Phương thức lấy thông tin người dùng theo ID public User getUser(long userId) { SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor = db.query(TABLE_USERS, new String[]{COLUMN_ID, COLUMN_USERNAME, COLUMN_AVATAR_URL}, COLUMN_ID + "=?", new String[]{String.valueOf(userId)}, null, null, null); User user = null; if (cursor != null && cursor.moveToFirst()) { user = new User( cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_ID)), cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_USERNAME)), cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_AVATAR_URL)) ); cursor.close(); } db.close(); return user; } // Phương thức thêm bài đăng mới public long addPost(long userId, String content, String imageUrl) { SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(COLUMN_USER_ID, userId); values.put(COLUMN_CONTENT, content); values.put(COLUMN_IMAGE_URL, imageUrl); values.put(COLUMN_CREATED_AT, System.currentTimeMillis()); long id = db.insert(TABLE_POSTS, null, values); db.close(); return id; } // Phương thức lấy tất cả bài đăng public List getAllPosts() { List posts = new ArrayList<>(); String selectQuery = "SELECT p.*, u." + COLUMN_USERNAME + ", u." + COLUMN_AVATAR_URL + ", (SELECT COUNT(*) FROM " + TABLE_LIKES + " WHERE " + COLUMN_POST_ID + " = p." + COLUMN_ID + ") as like_count" + ", (SELECT COUNT(*) FROM " + TABLE_COMMENTS + " WHERE " + COLUMN_POST_ID + " = p." + COLUMN_ID + ") as comment_count" + " FROM " + TABLE_POSTS + " p" + " INNER JOIN " + TABLE_USERS + " u ON p." + COLUMN_USER_ID + " = u." + COLUMN_ID + " ORDER BY p." + COLUMN_CREATED_AT + " DESC"; SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor = db.rawQuery(selectQuery, null); if (cursor.moveToFirst()) { do { Post post = new Post(); post.setId(cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_ID))); post.setUserId(cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_USER_ID))); post.setContent(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_CONTENT))); post.setImageUrl(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_IMAGE_URL))); post.setCreatedAt(cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_CREATED_AT))); post.setUsername(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_USERNAME))); post.setAvatarUrl(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_AVATAR_URL))); post.setLikeCount(cursor.getInt(cursor.getColumnIndexOrThrow("like_count"))); post.setCommentCount(cursor.getInt(cursor.getColumnIndexOrThrow("comment_count"))); posts.add(post); } while (cursor.moveToNext()); } cursor.close(); db.close(); return posts; } // Phương thức thêm bình luận mới public long addComment(long userId, long postId, String content) { SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(COLUMN_USER_ID, userId); values.put(COLUMN_POST_ID, postId); values.put(COLUMN_CONTENT, content); values.put(COLUMN_CREATED_AT, System.currentTimeMillis()); long id = db.insert(TABLE_COMMENTS, null, values); db.close(); return id; } // Phương thức lấy tất cả bình luận cho một bài đăng public List getCommentsForPost(long postId) { List comments = new ArrayList<>(); String selectQuery = "SELECT c.*, u." + COLUMN_USERNAME + ", u." + COLUMN_AVATAR_URL + " FROM " + TABLE_COMMENTS + " c" + " INNER JOIN " + TABLE_USERS + " u ON c." + COLUMN_USER_ID + " = u." + COLUMN_ID + " WHERE c." + COLUMN_POST_ID + " = ?" + " ORDER BY c." + COLUMN_CREATED_AT + " ASC"; SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor = db.rawQuery(selectQuery, new String[]{String.valueOf(postId)}); if (cursor.moveToFirst()) { do { Comment comment = new Comment(); comment.setId(cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_ID))); comment.setUserId(cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_USER_ID))); comment.setPostId(cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_POST_ID))); comment.setContent(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_CONTENT))); comment.setCreatedAt(cursor.getLong(cursor.getColumnIndexOrThrow(COLUMN_CREATED_AT))); comment.setUsername(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_USERNAME))); comment.setAvatarUrl(cursor.getString(cursor.getColumnIndexOrThrow(COLUMN_AVATAR_URL))); comments.add(comment); } while (cursor.moveToNext()); } cursor.close(); db.close(); return comments; } // Phương thức kiểm tra xem người dùng đã thích bài đăng chưa public boolean isPostLikedByUser(long userId, long postId) { SQLiteDatabase db = this.getReadableDatabase(); String selectQuery = "SELECT * FROM " + TABLE_LIKES + " WHERE " + COLUMN_USER_ID + " = ? AND " + COLUMN_POST_ID + " = ?"; Cursor cursor = db.rawQuery(selectQuery, new String[]{String.valueOf(userId), String.valueOf(postId)}); boolean isLiked = cursor.getCount() > 0; cursor.close(); db.close(); return isLiked; } // Phương thức thêm hoặc xóa like public void toggleLike(long userId, long postId) { SQLiteDatabase db = this.getWritableDatabase(); if (isPostLikedByUser(userId, postId)) { // Xóa like nếu đã tồn tại db.delete(TABLE_LIKES, COLUMN_USER_ID + " = ? AND " + COLUMN_POST_ID + " = ?", new String[]{String.valueOf(userId), String.valueOf(postId)}); } else { // Thêm like mới ContentValues values = new ContentValues(); values.put(COLUMN_USER_ID, userId); values.put(COLUMN_POST_ID, postId); values.put(COLUMN_CREATED_AT, System.currentTimeMillis()); db.insert(TABLE_LIKES, null, values); } db.close(); } // Phương thức đếm số lượng like cho một bài đăng public int getLikeCountForPost(long postId) { SQLiteDatabase db = this.getReadableDatabase(); String countQuery = "SELECT COUNT(*) FROM " + TABLE_LIKES + " WHERE " + COLUMN_POST_ID + " = ?"; Cursor cursor = db.rawQuery(countQuery, new String[]{String.valueOf(postId)}); cursor.moveToFirst(); int count = cursor.getInt(0); cursor.close(); db.close(); return count; } // Lớp User public static class User { private long id; private String username; private String avatarUrl; public User() { } public User(long id, String username, String avatarUrl) { this.id = id; this.username = username; this.avatarUrl = avatarUrl; } public long getId() { return id; } public void setId(long id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getAvatarUrl() { return avatarUrl; } public void setAvatarUrl(String avatarUrl) { this.avatarUrl = avatarUrl; } } // Lớp Post public static class Post { private long id; private long userId; private String content; private String imageUrl; private long createdAt; private String username; private String avatarUrl; private int likeCount; private int commentCount; private boolean isLikedByCurrentUser; public Post() { } public long getId() { return id; } public void setId(long id) { this.id = id; } public long getUserId() { return userId; } public void setUserId(long userId) { this.userId = userId; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public String getImageUrl() { return imageUrl; } public void setImageUrl(String imageUrl) { this.imageUrl = imageUrl; } public long getCreatedAt() { return createdAt; } public void setCreatedAt(long createdAt) { this.createdAt = createdAt; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getAvatarUrl() { return avatarUrl; } public void setAvatarUrl(String avatarUrl) { this.avatarUrl = avatarUrl; } public int getLikeCount() { return likeCount; } public void setLikeCount(int likeCount) { this.likeCount = likeCount; } public int getCommentCount() { return commentCount; } public void setCommentCount(int commentCount) { this.commentCount = commentCount; } public boolean isLikedByCurrentUser() { return isLikedByCurrentUser; } public void setLikedByCurrentUser(boolean likedByCurrentUser) { isLikedByCurrentUser = likedByCurrentUser; } } // Lớp Comment public static class Comment { private long id; private long userId; private long postId; private String content; private long createdAt; private String username; private String avatarUrl; public Comment() { } public long getId() { return id; } public void setId(long id) { this.id = id; } public long getUserId() { return userId; } public void setUserId(long userId) { this.userId = userId; } public long getPostId() { return postId; } public void setPostId(long postId) { this.postId = postId; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public long getCreatedAt() { return createdAt; } public void setCreatedAt(long createdAt) { this.createdAt = createdAt; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getAvatarUrl() { return avatarUrl; } public void setAvatarUrl(String avatarUrl) { this.avatarUrl = avatarUrl; } } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/SessionManager.java" isMerged="true" package com.example.socialmediaapp; import android.content.Context; import android.content.SharedPreferences; public class SessionManager { private static final String PREF_NAME = "SocialMediaAppSession"; private static final String KEY_USER_ID = "userId"; private static final String KEY_USERNAME = "username"; private static final String KEY_IS_LOGGED_IN = "isLoggedIn"; private SharedPreferences pref; private SharedPreferences.Editor editor; private Context context; public SessionManager(Context context) { this.context = context; pref = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE); editor = pref.edit(); } public void createLoginSession(long userId, String username) { editor.putBoolean(KEY_IS_LOGGED_IN, true); editor.putLong(KEY_USER_ID, userId); editor.putString(KEY_USERNAME, username); editor.commit(); } public boolean isLoggedIn() { return pref.getBoolean(KEY_IS_LOGGED_IN, false); } public long getUserId() { return pref.getLong(KEY_USER_ID, 1); // Mặc định trả về user_id = 1 } public String getUsername() { return pref.getString(KEY_USERNAME, "user1"); // Mặc định trả về username = "user1" } public void logout() { editor.clear(); editor.commit(); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/MainActivity.java" isEdit="true" isMerged="true" package com.example.socialmediaapp; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import com.example.socialmediaapp.databinding.ActivityMainBinding; import java.util.List; public class MainActivity extends AppCompatActivity { private ActivityMainBinding binding; private DatabaseHelper dbHelper; private PostAdapter postAdapter; private SessionManager sessionManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); binding = ActivityMainBinding.inflate(getLayoutInflater()); setContentView(binding.getRoot()); dbHelper = new DatabaseHelper(this); sessionManager = new SessionManager(this); // Thiết lập RecyclerView binding.recyclerView.setLayoutManager(new LinearLayoutManager(this)); postAdapter = new PostAdapter(this, dbHelper, sessionManager); binding.recyclerView.setAdapter(postAdapter); // Thiết lập sự kiện click cho ô tạo bài đăng binding.layoutCreatePost.setOnClickListener(v -> { if (sessionManager.isLoggedIn()) { Intent intent = new Intent(MainActivity.this, CreatePostActivity.class); startActivity(intent); } else { Toast.makeText(MainActivity.this, "Bạn cần đăng nhập để đăng bài", Toast.LENGTH_SHORT).show(); } }); // Thiết lập bottom navigation binding.bottomNavigation.setOnItemSelectedListener(item -> { int itemId = item.getItemId(); if (itemId == R.id.menu_home) { // Đã ở trang chủ return true; } else if (itemId == R.id.menu_create) { if (sessionManager.isLoggedIn()) { Intent intent = new Intent(MainActivity.this, CreatePostActivity.class); startActivity(intent); } else { Toast.makeText(MainActivity.this, "Bạn cần đăng nhập để đăng bài", Toast.LENGTH_SHORT).show(); } return true; } return true; }); } @Override protected void onResume() { super.onResume(); loadPosts(); } private void loadPosts() { List posts = dbHelper.getAllPosts(); postAdapter.setPosts(posts); } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/CreatePostActivity.java" isEdit="true" isMerged="true" package com.example.socialmediaapp; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.provider.MediaStore; import android.widget.Toast; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import com.bumptech.glide.Glide; import com.example.socialmediaapp.databinding.ActivityCreatePostBinding; public class CreatePostActivity extends AppCompatActivity { private ActivityCreatePostBinding binding; private DatabaseHelper dbHelper; private SessionManager sessionManager; private Uri selectedImageUri; private static final int PICK_IMAGE_REQUEST = 1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); binding = ActivityCreatePostBinding.inflate(getLayoutInflater()); setContentView(binding.getRoot()); dbHelper = new DatabaseHelper(this); sessionManager = new SessionManager(this); // Thiết lập thông tin người dùng binding.tvUsername.setText(sessionManager.getUsername()); // Thiết lập sự kiện click cho nút đóng binding.btnClose.setOnClickListener(v -> finish()); // Thiết lập sự kiện click cho nút đăng binding.btnPost.setOnClickListener(v -> { String content = binding.etPostContent.getText().toString().trim(); String imageUrl = selectedImageUri != null ? selectedImageUri.toString() : ""; if (content.isEmpty() && imageUrl.isEmpty()) { Toast.makeText(this, "Vui lòng nhập nội dung hoặc chọn ảnh", Toast.LENGTH_SHORT).show(); return; } long userId = sessionManager.getUserId(); long postId = dbHelper.addPost(userId, content, imageUrl); if (postId != -1) { Toast.makeText(this, "Đăng bài thành công", Toast.LENGTH_SHORT).show(); finish(); } else { Toast.makeText(this, "Đăng bài thất bại", Toast.LENGTH_SHORT).show(); } }); // Thiết lập sự kiện click cho nút thêm ảnh binding.btnAddImage.setOnClickListener(v -> { Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(intent, PICK_IMAGE_REQUEST); }); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) { selectedImageUri = data.getData(); binding.ivPostImage.setVisibility(android.view.View.VISIBLE); Glide.with(this).load(selectedImageUri).into(binding.ivPostImage); } } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/PostAdapter.java" isMerged="true" package com.example.socialmediaapp; import android.content.Context; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; import androidx.annotation.NonNull; import androidx.core.content.ContextCompat; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import com.bumptech.glide.Glide; import com.example.socialmediaapp.DatabaseHelper.Post; import com.example.socialmediaapp.DatabaseHelper.Comment; import java.util.ArrayList; import java.util.List; import de.hdodenhof.circleimageview.CircleImageView; public class PostAdapter extends RecyclerView.Adapter { private List posts = new ArrayList<>(); private Context context; private DatabaseHelper dbHelper; private SessionManager sessionManager; public PostAdapter(Context context, DatabaseHelper dbHelper, SessionManager sessionManager) { this.context = context; this.dbHelper = dbHelper; this.sessionManager = sessionManager; } @NonNull @Override public PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_post, parent, false); return new PostViewHolder(view); } @Override public void onBindViewHolder(@NonNull PostViewHolder holder, int position) { Post post = posts.get(position); // Thiết lập thông tin người dùng holder.tvUsername.setText(post.getUsername()); if (!TextUtils.isEmpty(post.getAvatarUrl())) { Glide.with(context).load(post.getAvatarUrl()).into(holder.ivUserAvatar); } // Thiết lập nội dung bài đăng holder.tvPostContent.setText(post.getContent()); // Thiết lập hình ảnh bài đăng nếu có if (!TextUtils.isEmpty(post.getImageUrl())) { holder.ivPostImage.setVisibility(View.VISIBLE); Glide.with(context).load(post.getImageUrl()).into(holder.ivPostImage); } else { holder.ivPostImage.setVisibility(View.GONE); } // Thiết lập số lượng like holder.tvLikeCount.setText(String.valueOf(post.getLikeCount())); // Thiết lập số lượng bình luận holder.tvCommentCount.setText(String.valueOf(post.getCommentCount())); // Kiểm tra xem người dùng hiện tại đã thích bài đăng chưa boolean isLiked = dbHelper.isPostLikedByUser(sessionManager.getUserId(), post.getId()); if (isLiked) { holder.ivLike.setColorFilter(ContextCompat.getColor(context, R.color.colorLiked)); } else { holder.ivLike.setColorFilter(ContextCompat.getColor(context, R.color.colorNotLiked)); } // Thiết lập adapter cho danh sách bình luận CommentAdapter commentAdapter = new CommentAdapter(context); holder.rvComments.setLayoutManager(new LinearLayoutManager(context)); holder.rvComments.setAdapter(commentAdapter); // Lấy danh sách bình luận cho bài đăng List comments = dbHelper.getCommentsForPost(post.getId()); if (comments.size() > 0) { holder.rvComments.setVisibility(View.VISIBLE); commentAdapter.setComments(comments); } else { holder.rvComments.setVisibility(View.GONE); } // Thiết lập sự kiện click cho nút like holder.layoutLike.setOnClickListener(v -> { dbHelper.toggleLike(sessionManager.getUserId(), post.getId()); notifyItemChanged(position); }); // Thiết lập sự kiện click cho nút bình luận holder.layoutComment.setOnClickListener(v -> { holder.etComment.requestFocus(); }); // Thiết lập sự kiện click cho nút gửi bình luận holder.btnSendComment.setOnClickListener(v -> { String commentContent = holder.etComment.getText().toString().trim(); if (!TextUtils.isEmpty(commentContent)) { long commentId = dbHelper.addComment(sessionManager.getUserId(), post.getId(), commentContent); if (commentId != -1) { holder.etComment.setText(""); // Cập nhật lại danh sách bình luận List updatedComments = dbHelper.getCommentsForPost(post.getId()); commentAdapter.setComments(updatedComments); holder.rvComments.setVisibility(View.VISIBLE); // Cập nhật số lượng bình luận post.setCommentCount(post.getCommentCount() + 1); holder.tvCommentCount.setText(String.valueOf(post.getCommentCount())); } else { Toast.makeText(context, "Bình luận thất bại", Toast.LENGTH_SHORT).show(); } } }); } @Override public int getItemCount() { return posts.size(); } public void setPosts(List posts) { this.posts = posts; notifyDataSetChanged(); } static class PostViewHolder extends RecyclerView.ViewHolder { CircleImageView ivUserAvatar, ivCommentUserAvatar; TextView tvUsername, tvPostContent, tvLikeCount, tvCommentCount; ImageView ivPostImage, ivLike; LinearLayout layoutLike, layoutComment, layoutShare; RecyclerView rvComments; EditText etComment; ImageButton btnSendComment; public PostViewHolder(@NonNull View itemView) { super(itemView); ivUserAvatar = itemView.findViewById(R.id.ivUserAvatar); ivCommentUserAvatar = itemView.findViewById(R.id.ivCommentUserAvatar); tvUsername = itemView.findViewById(R.id.tvUsername); tvPostContent = itemView.findViewById(R.id.tvPostContent); tvLikeCount = itemView.findViewById(R.id.tvLikeCount); tvCommentCount = itemView.findViewById(R.id.tvCommentCount); ivPostImage = itemView.findViewById(R.id.ivPostImage); ivLike = itemView.findViewById(R.id.ivLike); layoutLike = itemView.findViewById(R.id.layoutLike); layoutComment = itemView.findViewById(R.id.layoutComment); layoutShare = itemView.findViewById(R.id.layoutShare); rvComments = itemView.findViewById(R.id.rvComments); etComment = itemView.findViewById(R.id.etComment); btnSendComment = itemView.findViewById(R.id.btnSendComment); } } } [V0_FILE]java:file="app/src/main/java/com/example/socialmediaapp/CommentAdapter.java" isMerged="true" package com.example.socialmediaapp; import android.content.Context; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.recyclerview.widget.RecyclerView; import com.bumptech.glide.Glide; import com.example.socialmediaapp.DatabaseHelper.Comment; import java.util.ArrayList; import java.util.List; import de.hdodenhof.circleimageview.CircleImageView; public class CommentAdapter extends RecyclerView.Adapter { private List comments = new ArrayList<>(); private Context context; public CommentAdapter(Context context) { this.context = context; } @NonNull @Override public CommentViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_comment, parent, false); return new CommentViewHolder(view); } @Override public void onBindViewHolder(@NonNull CommentViewHolder holder, int position) { Comment comment = comments.get(position); holder.tvCommentUsername.setText(comment.getUsername()); holder.tvCommentContent.setText(comment.getContent()); if (!TextUtils.isEmpty(comment.getAvatarUrl())) { Glide.with(context).load(comment.getAvatarUrl()).into(holder.ivCommentUserAvatar); } } @Override public int getItemCount() { return comments.size(); } public void setComments(List comments) { this.comments = comments; notifyDataSetChanged(); } static class CommentViewHolder extends RecyclerView.ViewHolder { CircleImageView ivCommentUserAvatar; TextView tvCommentUsername, tvCommentContent; public CommentViewHolder(@NonNull View itemView) { super(itemView); ivCommentUserAvatar = itemView.findViewById(R.id.ivCommentUserAvatar); tvCommentUsername = itemView.findViewById(R.id.tvCommentUsername); tvCommentContent = itemView.findViewById(R.id.tvCommentContent); } } } [V0_FILE]xml:file="app/src/main/res/layout/activity_main.xml" isEdit="true" isMerged="true" [V0_FILE]xml:file="app/src/main/res/layout/activity_create_post.xml" isEdit="true" isMerged="true"