Error inflating class jp.co.recruit_mp.android.lightcalendarview.MonthView noSuchMethodException

[ThomasCookDeveloperInfo]

I am receiving a noSuchMethodException when trying to inflate the month view. It's easy to reproduce with a blank project and adding this view to the main activity:

<?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="com.thomascoook.testbed.MainActivity">

	<jp.co.recruit_mp.android.lightcalendarview.MonthView
		android:layout_width="match_parent"
		android:layout_height="wrap_content">

	</jp.co.recruit_mp.android.lightcalendarview.MonthView>

</android.support.constraint.ConstraintLayout>

Here is the part of the stack trace that I believe is important:

Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class jp.co.recruit_mp.android.lightcalendarview.MonthView
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class jp.co.recruit_mp.android.lightcalendarview.MonthView
Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]

And when I look at the source code for your view I can see the problem is you are not supplying the required constructors as per this StackOverflow post and and my own experience: https://stackoverflow.com/questions/11753719/how-do-i-properly-extend-a-layout-class.

The library class in question:

/**
 * 月カレンダーを表示する {@link LinearLayout}
 * Created by masayuki-recruit on 8/19/16.
 */
class MonthView(context: Context, private val settings: CalendarSettings, var month: Date) : LinearLayout(context), DayLayout.Callback {

    internal var callback: Callback? = null

    private val weekDayLayout: WeekDayLayout
    private val dayLayout: DayLayout

    init {
        orientation = LinearLayout.VERTICAL

        weekDayLayout = WeekDayLayout(context, settings)
        addView(weekDayLayout, LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT))

        dayLayout = DayLayout(context, settings, month).apply { callback = this@MonthView }
        addView(dayLayout, LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT))
    }

    override fun onDateSelected(date: Date) {
        callback?.onDateSelected(date)
    }

    fun setSelectedDate(date: Date) {
        dayLayout.setSelectedDay(date)
    }

    fun setAccents(date: Date, accents: Collection<Accent>) = dayLayout.let {
        it.getDayView(date)?.setAccents(accents)
        it.invalidateDayViews()
    }

    fun setAccents(map: Map<Date, Collection<Accent>>) {
        map.forEach { it ->
            val (date, accents) = it
            dayLayout.getDayView(date)?.setAccents(accents)
        }
        dayLayout.invalidateDayViews()
    }

    interface Callback {
        fun onDateSelected(date: Date)
    }

    override fun toString(): String = "MonthView(${month})"
}

Here is the full stack trace:

11-08 12:26:16.061 4539-4539/com.thomascoook.testbed E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.thomascoook.testbed, PID: 4539
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.thomascoook.testbed/com.thomascoook.testbed.MainActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class jp.co.recruit_mp.android.lightcalendarview.MonthView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class jp.co.recruit_mp.android.lightcalendarview.MonthView
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class jp.co.recruit_mp.android.lightcalendarview.MonthView
Caused by: java.lang.NoSuchMethodException: <init> [class android.content.Context, interface android.util.AttributeSet]
at java.lang.Class.getConstructor0(Class.java:2204)
at java.lang.Class.getConstructor(Class.java:1683)
at android.view.LayoutInflater.createView(LayoutInflater.java:618)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.thomascoook.testbed.MainActivity.onCreate(MainActivity.kt:10)
at android.app.Activity.performCreate(Activity.java:6662)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)