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[Android×kotlin]端末がオンラインかオフラインを判断

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オンラインかオフラインか

タイトルの意味のままです

```kotlin.kt private fun isOnline(): Boolean { val connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager val networkInfo = connectivityManager.activeNetworkInfo return networkInfo?.isConnected == true } ```

オンラインならtrueオフラインならfalseが返ってきます

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