package com.example.collaborationapp.model; import java.util.Objects; public class Employee { private long id; private String name; private String email; private String role; // Constructor public Employee(long id, String name, String email, String role) { this.id = id; this.name = name; this.email = email; this.role = role; } // Getters public long getId() { return id; } public String getName() { return name; } public String getEmail() { return email; } public String getRole() { return role; } // Setters (optional, for updates) public void setName(String name) { this.name = name; } public void setEmail(String email) { this.email = email; } public void setRole(String role) { this.role = role; } // Override toString for simple display in lists @Override public String toString() { return name + " (" + role + ")"; } // Override equals and hashCode for proper list management @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Employee employee = (Employee) o; return id == employee.id; } @Override public int hashCode() { return Objects.hash(id); } } package com.example.collaborationapp.model; import java.util.Objects; public class Project { private long id; private String name; private String description; private String status; // e.g., "Planning", "In Progress", "Completed" // Constructor public Project(long id, String name, String description, String status) { this.id = id; this.name = name; this.description = description; this.status = status; } // Getters public long getId() { return id; } public String getName() { return name; } public String getDescription() { return description; } public String getStatus() { return status; } // Setters (optional, for updates) public void setName(String name) { this.name = name; } public void setDescription(String description) { this.description = description; } public void setStatus(String status) { this.status = status; } // Override toString for simple display in lists @Override public String toString() { return name + " [" + status + "]"; } // Override equals and hashCode for proper list management @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Project project = (Project) o; return id == project.id; } @Override public int hashCode() { return Objects.hash(id); } } package com.example.collaborationapp.data; import com.example.collaborationapp.model.Employee; import com.example.collaborationapp.model.Project; import java.util.ArrayList; import java.util.List; import java.util.Optional; import java.util.concurrent.atomic.AtomicLong; public class DataManager { private static DataManager instance; private final List employees; private final List projects; private final AtomicLong employeeIdCounter = new AtomicLong(0); private final AtomicLong projectIdCounter = new AtomicLong(0); private DataManager() { employees = new ArrayList<>(); projects = new ArrayList<>(); // Add some initial sample data addEmployee("Alice Wonderland", "alice@example.com", "Developer"); addEmployee("Bob The Builder", "bob@example.com", "Manager"); addProject("Website Redesign", "Update company website", "Planning"); addProject("Mobile App Launch", "Develop and launch new mobile app", "In Progress"); } public static synchronized DataManager getInstance() { if (instance == null) { instance = new DataManager(); } return instance; } // --- Employee Methods --- public List getAllEmployees() { return new ArrayList<>(employees); // Return a copy } public Optional getEmployeeById(long id) { return employees.stream().filter(e -> e.getId() == id).findFirst(); } public Employee addEmployee(String name, String email, String role) { long newId = employeeIdCounter.incrementAndGet(); Employee newEmployee = new Employee(newId, name, email, role); employees.add(newEmployee); return newEmployee; } public boolean updateEmployee(long id, String name, String email, String role) { Optional employeeOpt = getEmployeeById(id); if (employeeOpt.isPresent()) { Employee employee = employeeOpt.get(); employee.setName(name); employee.setEmail(email); employee.setRole(role); return true; } return false; } public boolean deleteEmployee(long id) { return employees.removeIf(e -> e.getId() == id); } // --- Project Methods --- public List getAllProjects() { return new ArrayList<>(projects); // Return a copy } public Optional getProjectById(long id) { return projects.stream().filter(p -> p.getId() == id).findFirst(); } public Project addProject(String name, String description, String status) { long newId = projectIdCounter.incrementAndGet(); Project newProject = new Project(newId, name, description, status); projects.add(newProject); return newProject; } public boolean updateProject(long id, String name, String description, String status) { Optional projectOpt = getProjectById(id); if (projectOpt.isPresent()) { Project project = projectOpt.get(); project.setName(name); project.setDescription(description); project.setStatus(status); return true; } return false; } public boolean deleteProject(long id) { return projects.removeIf(p -> p.getId() == id); } } package com.example.collaborationapp.adapter; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import com.example.collaborationapp.R; // Assuming R is generated in this package import com.example.collaborationapp.model.Employee; import java.util.List; public class EmployeeAdapter extends ArrayAdapter { private final Context context; private final List employees; public EmployeeAdapter(@NonNull Context context, @NonNull List employees) { super(context, 0, employees); // Use 0 for resource ID as we inflate manually this.context = context; this.employees = employees; } @NonNull @Override public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) { View listItem = convertView; if (listItem == null) { // Use a simple default layout or create list_item_employee.xml // For simplicity, using android.R.layout.simple_list_item_2 // Replace with your custom layout R.layout.list_item_employee if created listItem = LayoutInflater.from(context).inflate(android.R.layout.simple_list_item_2, parent, false); } Employee currentEmployee = employees.get(position); TextView text1 = listItem.findViewById(android.R.id.text1); TextView text2 = listItem.findViewById(android.R.id.text2); if (text1 != null) { text1.setText(currentEmployee.getName()); } if (text2 != null) { text2.setText(currentEmployee.getRole() + " - " + currentEmployee.getEmail()); } return listItem; } // Optional: Method to update data if the list changes dynamically public void updateData(List newEmployees) { this.employees.clear(); this.employees.addAll(newEmployees); notifyDataSetChanged(); // Important to refresh the ListView } } package com.example.collaborationapp.adapter; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import com.example.collaborationapp.R; // Assuming R is generated in this package import com.example.collaborationapp.model.Project; import java.util.List; public class ProjectAdapter extends ArrayAdapter { private final Context context; private final List projects; public ProjectAdapter(@NonNull Context context, @NonNull List projects) { super(context, 0, projects); // Use 0 for resource ID as we inflate manually this.context = context; this.projects = projects; } @NonNull @Override public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) { View listItem = convertView; if (listItem == null) { // Use a simple default layout or create list_item_project.xml // For simplicity, using android.R.layout.simple_list_item_2 // Replace with your custom layout R.layout.list_item_project if created listItem = LayoutInflater.from(context).inflate(android.R.layout.simple_list_item_2, parent, false); } Project currentProject = projects.get(position); TextView text1 = listItem.findViewById(android.R.id.text1); TextView text2 = listItem.findViewById(android.R.id.text2); if (text1 != null) { text1.setText(currentProject.getName()); } if (text2 != null) { text2.setText(currentProject.getStatus() + ": " + currentProject.getDescription()); } return listItem; } // Optional: Method to update data if the list changes dynamically public void updateData(List newProjects) { this.projects.clear(); this.projects.addAll(newProjects); notifyDataSetChanged(); // Important to refresh the ListView } } package com.example.collaborationapp.activity; import android.os.Bundle; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; import com.example.collaborationapp.R; // Assuming R is generated import com.example.collaborationapp.adapter.EmployeeAdapter; import com.example.collaborationapp.data.DataManager; import com.example.collaborationapp.model.Employee; import java.util.List; public class EmployeeListActivity extends AppCompatActivity { private ListView employeeListView; private EmployeeAdapter employeeAdapter; private DataManager dataManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // You need a layout file, e.g., activity_employee_list.xml with a ListView android:id="@+id/employeeListView" setContentView(R.layout.activity_employee_list); // Make sure this layout exists dataManager = DataManager.getInstance(); employeeListView = findViewById(R.id.employeeListView); // Make sure this ID exists in your layout // Setup Adapter List employees = dataManager.getAllEmployees(); employeeAdapter = new EmployeeAdapter(this, employees); employeeListView.setAdapter(employeeAdapter); // Handle item clicks (e.g., view details, edit, delete) employeeListView.setOnItemClickListener((parent, view, position, id) -> { Employee selectedEmployee = employeeAdapter.getItem(position); if (selectedEmployee != null) { // Example action: Show a toast with employee details Toast.makeText(this, "Clicked: " + selectedEmployee.getName(), Toast.LENGTH_SHORT).show(); // TODO: Implement navigation to detail/edit screen or show options menu } }); // TODO: Add button and logic for adding a new employee // TODO: Add context menu or other UI for updating/deleting employees } @Override protected void onResume() { super.onResume(); // Refresh list in case data changed while activity was paused refreshEmployeeList(); } private void refreshEmployeeList() { List updatedEmployees = dataManager.getAllEmployees(); employeeAdapter.updateData(updatedEmployees); } } package com.example.collaborationapp.activity; import android.os.Bundle; import android.widget.ListView; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; import com.example.collaborationapp.R; // Assuming R is generated import com.example.collaborationapp.adapter.ProjectAdapter; import com.example.collaborationapp.data.DataManager; import com.example.collaborationapp.model.Project; import java.util.List; public class ProjectListActivity extends AppCompatActivity { private ListView projectListView; private ProjectAdapter projectAdapter; private DataManager dataManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // You need a layout file, e.g., activity_project_list.xml with a ListView android:id="@+id/projectListView" setContentView(R.layout.activity_project_list); // Make sure this layout exists dataManager = DataManager.getInstance(); projectListView = findViewById(R.id.projectListView); // Make sure this ID exists in your layout // Setup Adapter List projects = dataManager.getAllProjects(); projectAdapter = new ProjectAdapter(this, projects); projectListView.setAdapter(projectAdapter); // Handle item clicks (e.g., view details, edit, delete) projectListView.setOnItemClickListener((parent, view, position, id) -> { Project selectedProject = projectAdapter.getItem(position); if (selectedProject != null) { // Example action: Show a toast with project details Toast.makeText(this, "Clicked: " + selectedProject.getName(), Toast.LENGTH_SHORT).show(); // TODO: Implement navigation to detail/edit screen or show options menu } }); // TODO: Add button and logic for adding a new project // TODO: Add context menu or other UI for updating/deleting projects } @Override protected void onResume() { super.onResume(); // Refresh list in case data changed while activity was paused refreshProjectList(); } private void refreshProjectList() { List updatedProjects = dataManager.getAllProjects(); projectAdapter.updateData(updatedProjects); } } package com.example.collaborationapp.activity; import android.content.Intent; import android.os.Bundle; import android.widget.Button; import androidx.appcompat.app.AppCompatActivity; import com.example.collaborationapp.R; // Assuming R is generated public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // You need a layout file, e.g., activity_main.xml with two Buttons: // android:id="@+id/btnViewEmployees" and android:id="@+id/btnViewProjects" setContentView(R.layout.activity_main); // Make sure this layout exists Button viewEmployeesButton = findViewById(R.id.btnViewEmployees); // Make sure this ID exists Button viewProjectsButton = findViewById(R.id.btnViewProjects); // Make sure this ID exists viewEmployeesButton.setOnClickListener(v -> { Intent intent = new Intent(MainActivity.this, EmployeeListActivity.class); startActivity(intent); }); viewProjectsButton.setOnClickListener(v -> { Intent intent = new Intent(MainActivity.this, ProjectListActivity.class); startActivity(intent); }); } } <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="16dp" android:gravity="center" tools:context=".activity.MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Collaboration App" android:textSize="24sp" android:layout_marginBottom="32dp"/> <Button android:id="@+id/btnViewEmployees" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="View Employees" android:layout_marginBottom="16dp"/> <Button android:id="@+id/btnViewProjects" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="View Projects"/> </LinearLayout> <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".activity.EmployeeListActivity"> <ListView android:id="@+id/employeeListView" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentTop="true" android:layout_above="@+id/btnAddEmployee" />     </RelativeLayout> <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".activity.ProjectListActivity"> <ListView android:id="@+id/projectListView" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentTop="true" android:layout_above="@+id/btnAddProject" />     </RelativeLayout> <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools"> <application android:allowBackup="true" android:dataExtractionRules="@xml/data_extraction_rules" android:fullBackupContent="@xml/backup_rules" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/Theme.CollaborationApp"  tools:targetApi="31"> <activity android:name=".activity.MainActivity" android:exported="true"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".activity.EmployeeListActivity" android:label="Employees" />  <activity android:name=".activity.ProjectListActivity" android:label="Projects" />  </application> </manifest>