Данные навигационного ящика не изменяются динамически

Question

Это MainActivity.java

package com.example.mhn.intercoapp;

import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AlertDialog;
import android.view.SubMenu;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.mhn.intercoapp.static_class.EmpDetail;
import com.example.mhn.intercoapp.static_class.session;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    session s;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        s=new session();
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

//        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
//        fab.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View view) {
//                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
//                        .setAction("Action", null).show();
//            }
//        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        if(s.getN().equals("g"))
        {
            displayMenuForGuards();
        }
        if(s.getN().equals("e"))
        {
            displayMenuForEmployee();
        }
    }

    private void displayMenuForGuards()
    {
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        View name =  navigationView.getHeaderView(0);
        TextView nav_user = (TextView)name.findViewById(R.id.name_textView_nav_header_xml);
        nav_user.setText("Guard");
        View email =  navigationView.getHeaderView(0);
        TextView nav_email = (TextView)email.findViewById(R.id.email_textView_nav_header_xml);
        nav_email.setText("[e-mail]");
        View image = navigationView.getHeaderView(0);
        ImageView nav_image = (ImageView) image.findViewById(R.id.user_image_imageView_nav_header_xml);
        nav_image.setImageResource(R.drawable.clients);

        final DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        Menu menu = navigationView.getMenu();
        SubMenu subMenu= menu.addSubMenu("Guards");
        menu.add("Dashboard").setIcon(R.drawable.ic_menu_gallery).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent = new Intent(getApplicationContext(),MainActivity.class);
                startActivity(intent);
                finish();
                return false;
            }
        });
        menu.add("Leave").setIcon(R.drawable.ic_menu_gallery).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent = new Intent(getApplicationContext(),LeaveActivity.class);
                startActivity(intent);
                finish();
                return false;
            }
        });
        menu.add("Salary Slip").setIcon(R.drawable.ic_menu_camera).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                return false;
            }
        });
        menu.add("Duties").setIcon(R.drawable.employee).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent = new Intent(getApplicationContext(),DutyActivity.class);
                startActivity(intent);
                finish();
                return false;
            }
        });
        menu.add("Logout").setIcon(R.drawable.ic_menu_gallery).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
               Toast.makeText(getApplicationContext(),"Logout",Toast.LENGTH_SHORT).show();
               Intent backIntent = new Intent(getApplicationContext(),loginCustom.class);
               startActivity(backIntent);
               s.setN("");
               finish();
                return false;
            }
        });
        drawerLayout.closeDrawers();

    }
    private void displayMenuForEmployee()
    {
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        View name =  navigationView.getHeaderView(0);
        TextView nav_user = (TextView)name.findViewById(R.id.name_textView_nav_header_xml);
        nav_user.setText("Employee");
        View email =  navigationView.getHeaderView(0);
        TextView nav_email = (TextView)email.findViewById(R.id.email_textView_nav_header_xml);
        nav_email.setText("[e-mail]");
        //NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        final DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        Menu menu = navigationView.getMenu();
        SubMenu subMenu= menu.addSubMenu("Employee");
        View image = navigationView.getHeaderView(0);
        ImageView nav_image = (ImageView) image.findViewById(R.id.user_image_imageView_nav_header_xml);
        nav_image.setImageResource(R.drawable.employee);
        menu.add("Dashboard").setIcon(R.drawable.ic_menu_gallery).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent = new Intent(getApplicationContext(),MainActivity.class);
                startActivity(intent);
                finish();
                return false;
            }
        });
        menu.add("Employee Directory").setIcon(R.drawable.ic_menu_camera).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent_= new Intent(getApplicationContext(),EmployeeDirectoryActivity.class);
                startActivity(intent_);
                finish();
                return false;
            }
        });
        menu.add("Projects").setIcon(R.drawable.ic_menu_gallery).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent = new Intent(getApplicationContext(),ProjectsActivity.class);
                startActivity(intent);
                finish();
                return false;
            }
        });
        menu.add("Tasks").setIcon(R.drawable.ic_menu_gallery).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent = new Intent(getApplicationContext(),LeaveActivity.class);
                startActivity(intent);
                finish();
                return false;
            }
        });
        menu.add("Time Logs").setIcon(R.drawable.attence);
        menu.add("Attendence").setIcon(R.drawable.attence).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent attendence_intent =new Intent(getApplicationContext(),AttendenceActivity.class);
                startActivity(attendence_intent);
                finish();
                return false;
            }
        });
        menu.add("Tickets").setIcon(R.drawable.attence);
        menu.add("Finance").setIcon(R.drawable.attence);
        menu.add("Messeges").setIcon(R.drawable.attence);
        menu.add("Events").setIcon(R.drawable.attence);
        menu.add("Leaves").setIcon(R.drawable.attence).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Intent intent = new Intent(getApplicationContext(),LeaveActivity.class);
                startActivity(intent);
                finish();
                return false;
            }
        });
        menu.add("Logout").setIcon(R.drawable.ic_menu_gallery).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem item) {
                Toast.makeText(getApplicationContext(),"Logout",Toast.LENGTH_SHORT).show();
                Intent backIntent = new Intent(getApplicationContext(),loginCustom.class);
                startActivity(backIntent);
                s.setN("");
                finish();
                return false;
            }
        });
        drawerLayout.closeDrawers();
    }

    @Override
    public void onBackPressed() {
//        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
//        if (drawer.isDrawerOpen(GravityCompat.START)) {
//            drawer.closeDrawer(GravityCompat.START);
//        } else {
//            super.onBackPressed();
//        }
        EmpDetail.reset();
        new AlertDialog.Builder(this)
                .setIcon(android.R.drawable.ic_dialog_alert)
                .setTitle("Warning")
                .setMessage("You want to Exit?")
                .setNegativeButton("No", null)
                .setPositiveButton("Yes", new DialogInterface.OnClickListener()
                {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }

                }).show();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();


      drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

это Activity_main_xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:menu="@menu/activity_main_drawer" />

</android.support.v4.widget.DrawerLayout>

Это app_bar_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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"
    tools:context=".MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_main" />

    <!--<android.support.design.widget.FloatingActionButton-->
        <!--android:id="@+id/fab"-->
        <!--android:layout_width="wrap_content"-->
        <!--android:layout_height="wrap_content"-->
        <!--android:layout_gravity="bottom|end"-->
        <!--android:layout_margin="@dimen/fab_margin"-->
        <!--app:srcCompat="@android:drawable/ic_dialog_email" />-->

</android.support.design.widget.CoordinatorLayout>

Это content_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".MainActivity"
    tools:showIn="@layout/app_bar_main">

    <RelativeLayout
        android:layout_below="@id/relatice_layout_header_Attendence_activity_xml"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <RelativeLayout
            android:id="@+id/re1"
            android:layout_alignParentLeft="true"
            android:layout_marginRight="10dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="20dp"
            android:layout_width="190dp"
            android:background="#259edf"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/text_view_re_1"
                android:layout_marginTop="20dp"
                android:layout_width="wrap_content"
                android:layout_marginRight="10dp"
                android:layout_marginLeft="10dp"
                android:layout_height="wrap_content"
                android:text="Attendences"/>
            <TextView
                android:layout_marginTop="40dp"
                android:layout_below="@id/text_view_re_1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_marginBottom="20dp"
                android:layout_marginRight="40dp"
                android:text="3"/>
        </RelativeLayout>
        <RelativeLayout
            android:id="@+id/re2"
            android:layout_marginRight="10dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="20dp"
            android:layout_alignParentRight="true"
            android:layout_toRightOf="@id/re1"
            android:layout_width="wrap_content"
            android:background="#54e12a"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/text_view_re_2"
                android:layout_marginTop="20dp"
                android:layout_width="wrap_content"
                android:layout_marginRight="10dp"
                android:layout_marginLeft="10dp"
                android:layout_height="wrap_content"
                android:text="Projects"/>
            <TextView
                android:layout_marginTop="40dp"
                android:layout_below="@id/text_view_re_2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="40dp"
                android:layout_marginBottom="20dp"
                android:layout_alignParentRight="true"
                android:text="10"/>
        </RelativeLayout>
        <RelativeLayout
            android:id="@+id/re3"
            android:layout_below="@id/re1"
            android:layout_alignParentLeft="true"
            android:layout_marginRight="10dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="20dp"
            android:layout_width="190dp"
            android:background="#da672d"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/text_view_re_3"
                android:layout_marginTop="20dp"
                android:layout_width="wrap_content"
                android:layout_marginRight="10dp"
                android:layout_marginLeft="10dp"
                android:layout_height="wrap_content"
                android:text="Tasks"/>
            <TextView
                android:layout_marginTop="40dp"
                android:layout_below="@id/text_view_re_3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_marginBottom="20dp"
                android:layout_marginRight="40dp"
                android:text="3"/>
        </RelativeLayout>
        <RelativeLayout
            android:id="@+id/re4"
            android:layout_below="@id/re1"
            android:layout_marginRight="10dp"
            android:layout_marginLeft="10dp"
            android:layout_marginTop="20dp"
            android:layout_alignParentRight="true"
            android:layout_toRightOf="@id/re1"
            android:layout_width="wrap_content"
            android:background="#98d6f5"
            android:layout_height="wrap_content">
            <TextView
                android:id="@+id/text_view_re_4"
                android:layout_marginTop="20dp"
                android:layout_width="wrap_content"
                android:layout_marginRight="10dp"
                android:layout_marginLeft="10dp"
                android:layout_height="wrap_content"
                android:text="Hourly Rate"/>
            <TextView
                android:layout_marginTop="40dp"
                android:layout_below="@id/text_view_re_4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="40dp"
                android:layout_marginBottom="20dp"
                android:layout_alignParentRight="true"
                android:text="$50"/>
        </RelativeLayout>
    </RelativeLayout>
</RelativeLayout>

Здесь я хочу динамически изменять статику приборной панели. (content_main.xml) Я имею в виду, что при входе сотрудника в систему он видит панель с другой статистикой, нежели охранник. здесь я как искать охранников

Изображение приборной панели для охранников

как я могу это сделать. Во-вторых, есть ли какой-либо предопределенный или сторонний виджет для разработки панели инструментов в Android.??