自定义Title

xml：

<jp.co.view.TitleLayout
    android:id="@+id/titleLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

TitleLayout：

package jp.co.view

import android.app.Activity
import android.content.Context
import android.util.AttributeSet
import android.view.LayoutInflater
import android.view.View
import android.widget.ImageView
import android.widget.LinearLayout
import android.widget.TextView
import jp.co.hyakujushibank.securestarter.R

class TitleLayout(context: Context, attrs: AttributeSet) : LinearLayout(context, attrs) {
    private var barImg: ImageView? = null
    private var titleTv: TextView? = null
    private var closeTv: TextView? = null

    init {
        LayoutInflater.from(context).inflate(R.layout.layout_title, this)
        val activity = (getContext() as Activity)
        val backImg = findViewById(R.id.backImg) as ImageView
        val closeTv = findViewById(R.id.closeTv) as TextView
        val titleTv = findViewById(R.id.titleTv) as TextView
        val barImg = findViewById(R.id.barImg) as ImageView
        this.barImg = barImg
        this.titleTv = titleTv
        this.closeTv = closeTv
        backImg.setOnClickListener { activity.finish() }
    }

    fun setBarImageResource(resource: Int) {
        barImg!!.setImageResource(resource)
    }

    fun setTitle(title: String) {
        titleTv!!.text = title
    }

    fun setCloseInvisible(){
        closeTv!!.visibility=View.INVISIBLE
    }
}

Layout:

<?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="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/backImg"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:paddingRight="20dp"
            android:src="@mipmap/back_black_btn" />

        <jp.co.hyakujushibank.view.JapanTextBoldView
            android:id="@+id/titleTv"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:gravity="center"
            android:text="はじめに"
            android:textSize="16dp" />

        <jp.co.hyakujushibank.view.JapanTextBoldView
            android:id="@+id/closeTv"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:layout_marginRight="5dp"
            android:gravity="center"
            android:text="中断する"
            android:textSize="16dp" />
    </LinearLayout>

    <View
        android:id="@+id/lineView"
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="@color/color_EBEBEB" />

    <ImageView
        android:id="@+id/barImg"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingBottom="10dp"
        android:paddingTop="10dp"
        android:src="@mipmap/nav_tab1" />
</LinearLayout>