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ViewからActivityを取得するメモ

Android
Kotlin

Last updated at 2021-10-07Posted at 2021-04-28

package com.objectfanatics.commons.android.view

import android.app.Activity
import android.content.ContextWrapper
import android.view.View

val View.activity: Activity
    get() = activityOrNull!!

val View.activityOrNull: Activity?
    get() = context.activityOrNull

val Context.activityOrNull: Activity?
    get() = when (val context = this) {
        is Activity       -> context
        is ContextWrapper -> context.baseContext.activityOrNull
        else              -> null
    }

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