CODEWITHSUNDEEP
javaandroid
Anjum
Anjum

Reputation: 681

How to set text in textView which is in NavigationView

I am getting null pointer exception while setting text in textview. textview is in navigation view in dashboard activity.

In main activity, i am trying to set text like this :

public class Dashboard extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {
protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_dashboard);
        TextView StudentNameView = (TextView) navigationView.findViewById(R.id.studentName);
        StudentNameView.setText("Test");
}
}

Here is my dashboard activity's 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_dashboard" 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_dashboard"
        app:menu="@menu/activity_dashboard_drawer" />

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

And my navigation header menu is

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="@dimen/nav_header_height"
    android:background="@drawable/side_nav_bar"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:theme="@style/ThemeOverlay.AppCompat.Dark" android:orientation="vertical"
    android:gravity="bottom">



    <TextView android:layout_width="match_parent" android:layout_height="wrap_content"
        android:paddingTop="@dimen/nav_header_vertical_spacing" android:text=""
        android:textAppearance="@style/TextAppearance.AppCompat.Body1"
       android:id="@+id/studentName"
        />

    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:text="" android:id="@+id/studentEmail" />

</LinearLayout>

Upvotes: 0

Views: 7636

Answers (5)

Mesah Barus
Mesah Barus

Reputation: 39

do what i write, maybe it will help you friend

NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);
    View v = navigationView.getHeaderView(0);
    txt_nama = (TextView) v.findViewById(R.id.tv_nama);
    txt_nama.setText("Halo, " + nama);

Upvotes: 0

Shree Krishna
Shree Krishna

Reputation: 8562

Have you Taken The reference of NavigationView and View before getting a TextView Reference ?? (Something like this)

android.support.design.widget.NavigationView navigationView= (NavigationView) findViewById (R.id.nav_view);

View view = navigationView.getHeaderView(0);

Upvotes: 0

Milos Lulic
Milos Lulic

Reputation: 627

Replace R.layout.NAME_OF_LAYOUT with name of layout where your TextView is

View navView = LayoutInflater.from(this).inflate(R.layout.NAME_OF_LAYOUT, null);

public class Dashboard extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_dashboard);

    View navView = LayoutInflater.from(this).inflate(R.layout.NAME_OF_LAYOUT, null); //navigation header menu layout
    TextView StudentNameView = (TextView)   navView.findViewById(R.id.studentName);
    StudentNameView.setText("Test");

   }
}

EDIT:

public class Dashboard extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_dashboard);

    View navView = LayoutInflater.from(this).inflate(R.layout.NAME_OF_LAYOUT, null); //navigation header menu layout
    TextView StudentNameView = (TextView)   navView.findViewById(R.id.studentName);
    StudentNameView.setText("Test");

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

    navigationView.addHeaderView(navView);

   }
}

Upvotes: 2

Rohit Heera
Rohit Heera

Reputation: 2737

 NavigationView navView = (NavigationView) findViewById(R.id.nav_view);
        View view = navView.getHeaderView(0);
      TextView   StudentNameView = (TextView) view.findViewById(R.id.studentName);

Upvotes: 1

Akash Jagtap
Akash Jagtap

Reputation: 404

More important is to use lib version v7:23.1.1 use compile 'com.android.support:appcompat-v7:23.1.1'

In your code write following lines 

NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
View v = navigationView.getHeaderView(0);
TextView avatarContainer = (TextView ) v.findViewById(R.id.imgAvatar);

Upvotes: 16

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