Закрывать диалог по клику вне области диалога (если setCanceledOnTouchOutside() не работает)

CancelableWrapperActivity.kt

import android.content.Context
import android.content.Intent
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.view.View
import java.lang.ref.WeakReference


typealias OnCreateListener = (context: Context) -> Unit

class CancelableWrapperActivity : AppCompatActivity() {
    companion object {
        private var onCreateRef: WeakReference<OnCreateListener>? = null

        fun start(context: Context, onCreate: OnCreateListener) {
            onCreateRef = WeakReference(onCreate)

            val intent = Intent(context, CancelableWrapperActivity::class.java)
            context.startActivity(intent)
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        onCreateRef?.get()?.invoke(this)

        val vContentContainer = findViewById<View>(android.R.id.content)
        vContentContainer.setOnTouchListener { v, event ->
            vContentContainer.setOnTouchListener(null)
            finish()
            true
        }
    }

    override fun onStop() {
        onCreateRef?.clear()
        super.onStop()
    }

    override fun finish() {
        super.finish()
        overridePendingTransition(0, 0)
    }
}

example.kt

        CancelableWrapperActivity.start(requireContext(), { context ->
            val builder = AlertDialog.Builder(context)
            // ...
            builder.setCancelable(true)
            val padding = resources.getDimension(R.dimen.feeds_theme_dialog_padding) * 2
            val width = resources.displayMetrics.widthPixels - padding
            val height = resources.displayMetrics.heightPixels - padding

            val alertDialog = builder.create()
            alertDialog.setCanceledOnTouchOutside(true)
            alertDialog.show()

            alertDialog.window.setLayout(width.toInt(), height.toInt())
            alertDialog.window.setFlags(
                    WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL, 
                    WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL)
        })

Manifest.xml

<activity
            android:name=".CancelableWrapperActivity"
            android:noHistory="true"
            android:theme="@style/AppTheme.Translucent"/>

style.xml

    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        ...
    </style>

    <style name="AppTheme.Translucent">
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowAnimationStyle">@null</item>
        <item name="android:background">#00000000</item>
    </style>