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Overview

The ManagerMain activity serves as the primary dashboard for managers in the Sales Management application. It provides comprehensive inventory management capabilities, team oversight, and access to various manager-specific features through a navigation drawer interface. Package: project.avishkar.salesmanagement Extends: AppCompatActivity Implements: NavigationView.OnNavigationItemSelectedListener

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Key Features

  • Inventory management with real-time Firebase synchronization
  • Add new inventory items with profit tracking
  • SwipeRefresh support for manual data updates
  • Navigation drawer with manager profile header
  • Team management and statistics access
  • Chat room and invite code sharing

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UI Components

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Primary Views

private RecyclerView mRecyclerView;           // Displays inventory items
private RecyclerView.Adapter mAdapter;         // InventoryAdapter instance
private SwipeRefreshLayout swipeRefreshLayout; // Pull-to-refresh functionality
private ProgressBar spinner;                   // Loading indicator
private FloatingActionButton fab;              // Add item button

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Input Fields (Dialog)

private EditText itemName;  // Item name input
private EditText profit;    // Profit per unit input
private MeterView q;        // Quantity picker

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Lifecycle Methods

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onCreate(Bundle savedInstanceState)

Initializes the activity, sets up the UI, and loads manager data from Firebase. 
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_manager_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    
    SessionManager sm = new SessionManager(getApplicationContext());
    HashMap<String, String> details = sm.getUserDetails();
    final String id = details.get("id");
    final String role = details.get("role");
    
    updateList(id, role, true);
}
The onCreate method retrieves the current manager’s ID and role from SessionManager and immediately loads the inventory list with a progress spinner.

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onBackPressed()

Overrides the default back button behavior to show a confirmation dialog before exiting. 
@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        // Shows FancyAlertDialog with exit confirmation
    }
}

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Firebase Integration

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Database Reference

private DatabaseReference databaseRef;

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Loading Inventory

Retrieves inventory items from Firebase Realtime Database: 
databaseRef = FirebaseDatabase.getInstance().getReference(role);
final ArrayList<InventoryItem> list = new ArrayList<>();
databaseRef.child(id).child("Inventory")
    .addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                InventoryItem it1 = snapshot.getValue(InventoryItem.class);
                list.add(it1);
            }
            mAdapter = new InventoryAdapter(getApplicationContext(), list, ManagerMain.this);
            mRecyclerView.setAdapter(mAdapter);
        }
    });

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Adding Inventory Items

When a manager adds a new item, it’s automatically distributed to all salespersons under that manager: 
// Add to manager's inventory
String key = databaseRef.child(id).child("Inventory").push().getKey();
databaseRef.child(id).child("Inventory").child(key).setValue(it);

// Propagate to all salespersons with matching manager name
final DatabaseReference databaseRef1 = FirebaseDatabase.getInstance().getReference("Salesperson");
databaseRef1.addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot2) {
        for(DataSnapshot snapshot1 : dataSnapshot2.getChildren()) {
            SalesPerson sp1 = snapshot1.getValue(SalesPerson.class);
            if(sp1.getManagerName().equals(ManagerName)) {
                String key1 = databaseRef1.child(salesperson_id).child("Inventory").push().getKey();
                databaseRef1.child(salesperson_id).child("Inventory").child(key1).setValue(it);
            }
        }
    }
});
When a manager adds an inventory item, the system automatically creates the same item in the inventory of all salespersons assigned to that manager, ensuring synchronized product availability across the team.

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onNavigationItemSelected(MenuItem item)

Handles navigation drawer menu selections:
Menu ItemActionDestination
dashboardStay on current screenManagerMain
my_accountView/edit account detailsAccountManager.class
my_teamView team membersMyTeam.class
statisticsView sales graphsGraphManagerActivity.class
nav_shareShare app APKSystem share intent
nav_sendShare invite codeText sharing intent
chat_roomOpen team chatChatRoom.class

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Invite Code Sharing

Managers can share their name as an invite code for salespersons: 
String shareBody = "Hey, signup using my name - " + 
                   snapshot.getValue(SalesManager.class).getName() + 
                   " on SalesManagement App.";
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
startActivity(Intent.createChooser(sharingIntent, "Send invite"));

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Key Methods

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updateList(String id, String role, boolean spin)

Refreshes the inventory list from Firebase. Parameters:
  • id - Manager’s unique identifier
  • role - User role (“Manager”)
  • spin - Whether to show loading spinner
private void updateList(String id, String role, final boolean spin) {
    if(spin == true)
        spinner.setVisibility(View.VISIBLE);
    
    databaseRef = FirebaseDatabase.getInstance().getReference(role);
    mRecyclerView = findViewById(R.id.items_list);
    final ArrayList<InventoryItem> list = new ArrayList<>();
    
    databaseRef.child(id).child("Inventory")
        .addListenerForSingleValueEvent(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    InventoryItem it1 = snapshot.getValue(InventoryItem.class);
                    list.add(it1);
                }
                mAdapter = new InventoryAdapter(getApplicationContext(), list, ManagerMain.this);
                mRecyclerView.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
                mRecyclerView.setAdapter(mAdapter);
                mAdapter.notifyDataSetChanged();
                if(spin == true)
                    spinner.setVisibility(View.GONE);
            }
        });
}
The updateList method is called both during initial activity creation and when the user performs a swipe-to-refresh gesture.

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SwipeRefresh Integration

Enables pull-to-refresh functionality: 
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
    @Override
    public void onRefresh() {
        updateList(id, role, false);
        swipeRefreshLayout.setRefreshing(false);
    }
});
Displays manager information in the drawer header: 
View headView = navigationView.getHeaderView(0);
final TextView headerManagerName = headView.findViewById(R.id.ManagerName);
final TextView headerManagerEmail = headView.findViewById(R.id.ManagerMail);
final ImageView headerManagerImage = headView.findViewById(R.id.imageView);

DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Manager");
reference.addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
        for(DataSnapshot snapshot : dataSnapshot.getChildren()) {
            if(snapshot.getKey().equals(id)) {
                SalesManager sm = snapshot.getValue(SalesManager.class);
                headerManagerName.setText(sm.getName());
                headerManagerEmail.setText(sm.getEmail());
                ImageSetter.setImage(getApplicationContext(), headerManagerImage, sm.getEmail(), spinner);
            }
        }
    }
});
  • InventoryItem - Data model for inventory items
  • InventoryAdapter - RecyclerView adapter for displaying inventory
  • SalesManager - Data model for manager information
  • SalesPerson - Data model for salesperson information
  • SessionManager - Manages user session data
  • ImageSetter - Utility for loading profile images

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