How to handle click events on custom items in the preference(PreferenceFragment)?

I created custom layout for preference in order to add new custom item to it. I add that layout with android:layout property. My custom layout looks like that:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:gravity="center_vertical"
    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
    android:background="?android:attr/selectableItemBackground"
    android:clipToPadding="false"
    android:baselineAligned="false">

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

    <RelativeLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:paddingTop="16dp"
        android:paddingBottom="16dp">

        <TextView
            android:id="@android:id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:singleLine="true"
            android:textAppearance="?android:attr/textAppearanceListItem"
            android:ellipsize="marquee"/>

        <TextView
            android:id="@android:id/summary"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@android:id/title"
            android:layout_alignStart="@android:id/title"
            android:layout_gravity="start"
            android:textAlignment="viewStart"
            android:textColor="?android:attr/textColorSecondary"
            android:maxLines="10"
            style="@style/PreferenceSummaryTextStyle"/>

    </RelativeLayout>

    <ImageView
        android:id="@+id/`preference_info`"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/ic_info"
        android:layout_marginStart="16dp"
        tools:ignore="ContentDescription" />

    <LinearLayout
        android:id="@android:id/widget_frame"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="end|center_vertical"
        android:paddingStart="16dp"
        android:paddingEnd="0dp"
        android:orientation="vertical"/>

</LinearLayout>

My new item has preference_info id. How to handle click event on onPreferenceTreeClick to handle simple click events on the whole preference line?

This no straight forward way to grab custom layout views from Preferences, you would have to create a custom Preference that extends Preference from androidx.preference and override either onBindView(view:View) methods, only there can you get hold of the views in your Preference's layout.

 class CustomInfoPreference(context:Context) : Preference(context){
      constructor(context: Context, attrs: AttributeSet): super(context,attrs)

      override protected fun onBindView(view:View){ 
        super(view)
      val preferenceInfo = view.findViewById<ImageView>(R.id.preference_info) 
       
       preferenceInfo.setOnClickListener{
           // Perform action!
          }
        }

     }

Then in your preference.xml you can use the custom preference like this:

<PreferenceCategory
android:title="...." >

<com.example.appname.CustomInfoPreference
        android:key="pref key"
        android:title="your pref title"
        android:summary="your pref summary"
        android:defaultValue=""
        android:layout="@layout/custom_preference_layout" />

 </PreferenceCategory>

Also checkout this SO thread: Android Set Custom Preference Layout