How to start SearchActivity when clicked on edit text

I followed this link for creating search interface. But there was no proper explanation about how to start search activity when clicked on edit text but there is an explanation for only menu items. My interface is in NoActionBarStyle as shown in below code and image

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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="perspective.secretbrowser.MainActivity">

    <android.support.constraint.ConstraintLayout
        android:layout_width="0dp"
        android:layout_height="56dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:background="@color/colorPrimary"
        tools:layout_constraintRight_creator="1"
        tools:layout_constraintLeft_creator="1"
        android:id="@+id/constraintLayout">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:scaleType="fitXY"
            android:src="@drawable/menu_small"
            android:background="?attr/selectableItemBackgroundBorderless"
            android:clickable="true"
            android:id="@+id/options"
            android:visibility="visible"
            android:layout_marginRight="8dp"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            android:layout_marginTop="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginBottom="8dp"
            android:layout_marginEnd="8dp" />

        <ImageView
            android:id="@+id/tabs"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/tabs_small"
            android:visibility="visible"
            android:scaleType="fitXY"
            android:background="?attr/selectableItemBackgroundBorderless"
            android:clickable="true"
            app:layout_constraintRight_toLeftOf="@+id/options"
            android:layout_marginRight="8dp"
            app:layout_constraintBottom_toBottomOf="parent"
            android:layout_marginBottom="8dp"
            app:layout_constraintTop_toTopOf="parent"
            android:layout_marginTop="8dp"
            android:layout_marginEnd="8dp" />

        <EditText
            android:id="@+id/url_txt"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginBottom="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginRight="8dp"
            android:layout_marginTop="8dp"
            android:background="@drawable/url_bg"
            android:hint="@string/search_hint"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toLeftOf="@+id/tabs"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.333"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp" />
    </android.support.constraint.ConstraintLayout>

    <com.gc.materialdesign.views.ProgressBarDeterminate
        android:id="@+id/progressBar"
        android:layout_width="0dp"
        android:layout_height="3dp"
        android:visibility="visible"
        app:layout_constraintBottom_toTopOf="@+id/webView"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/constraintLayout" />

    <WebView
        android:id="@+id/webView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/progressBar" />
</android.support.constraint.ConstraintLayout>

MainActivity.xml

Suggest me code that will trigger searchactivity when clicked on edittext

Finally found answer

set onclicklistner on edittext and trigger search activity using the search(null,false,null,false)

Look here for detailed explaination