Set the value of textfield in an inner layout in Android

Question

I want to set the value of a textfield in an inner layout. This is my parent xml(outer layout).

activity_navigator.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.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>

nav_header_main.xml

<?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="@dimen/nav_header_height"
    android:background="@drawable/ic_background"
    android:gravity="bottom"
    android:orientation="vertical"
    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">

    <TextView
        android:layout_width="119dp"
        android:layout_height="wrap_content"
        android:paddingTop="@dimen/nav_header_vertical_spacing"
        android:id="@+id/userTextView"
        android:text="text"
        android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
</LinearLayout>

I wanto set the value of the text field userTextView from navigator.kt class

navigator.kt

       override fun onCreate(savedInstanceState: Bundle?) {
                super.onCreate(savedInstanceState)
                setContentView(R.layout.activity_navigator)
//getting exception here
                  val userTextView: TextView= findViewById<TextView>(R.id.userTextView)
           Log.d("usertextview",userTextView.toString())

                }

Please help me solve this.

You are using the wrong id of your textview. In your layout, you have declared id as userName and in the code you are referring to userTextView — Gautam, Feb 21 '19 at 07:46
@Gautam Sorry that was the mistake when I copied the code snippet. Actually i gave the correct id — Amrutha Jaya Raj, Feb 21 '19 at 08:50

score 6 · Accepted Answer · answered Feb 21 '19 at 07:42

try this in your navigator.kt

get your navigation headerview and set text to TextView. Like this

    lateinit var  navView:View
    lateinit var  txt_name : TextView

    navView = nav_view.getHeaderView(0)

    txt_name = navView.findViewById(R.id.userName) as TextView
    txt_name.text = "user"

Set the value of textfield in an inner layout in Android

1 Answers1