Why doesnt this open the webview

Issue

I have an ImageButton on navigation_menu_header.xml

<ImageButton xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/signIn"
android:layout_width="match_parent"
android:layout_height="61dp"
android:src="@drawable/signin"
android:textAlignment="center"
/>

And here is my main_activity class code for the button

    public void signIn() {
    ImageButton img = (ImageButton) getLayoutInflater().inflate(R.layout.navigation_menu_header,null);
    img.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this, WebViewActivity.class));

        }
    });
}

The WebViewActivity works fine since I tried with a button that is on the mainactivity.xml but because I have the ImageButton on another xml, it does not open the webview.

Edit Added mainactivity.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/navigation_menu_header">

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

Solution

Use this:

NavigationView navigationView=(NavigationView) findViewById(R.id.nav_view);
View headerView = navigationView.getHeaderView(0);
ImageButton img =(ImageButton)headerView.findViewById(R.id.signIn);



img.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            startActivity(new Intent(MainActivity.this, WebViewActivity.class));

        }
    });

Answered By - Divyesh Patel