kotlin中的Android检查互联网连接

Question

我需要检查的设备是否有互联网连接，我搜索一些例子，但当我复制和粘贴的代码，我总是得到错误或不推荐的函数。我也不明白我必须把检查连接的方法放在哪里，因为我需要检查viewModel中的internet连接来发出一些请求，而我找到的所有方法都在参数中有上下文，而我无法在viewModel中获得上下文。

我尝试了这段代码，但我不明白我必须把它放在哪里，我得到

不推荐使用“type_wifi,TYPE_MOBILE,type_ethernet:int”。在Java不推荐使用

private fun isInternetAvailable(context: Context): Boolean {
        var result = false
        val connectivityManager =
            context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val networkCapabilities = connectivityManager.activeNetwork ?: return false
            val actNw =
                connectivityManager.getNetworkCapabilities(networkCapabilities) ?: return false
            result = when {
                actNw.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
                actNw.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
                actNw.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) -> true
                else -> false
            }
        } else {
            connectivityManager.run {
                connectivityManager.activeNetworkInfo?.run {
                    result = when (type) {
                        ConnectivityManager.TYPE_WIFI -> true
                        ConnectivityManager.TYPE_MOBILE -> true
                        ConnectivityManager.TYPE_ETHERNET -> true
                        else -> false
                    }

                }
            }
        }

        return result
    }

有人能给我解释一下怎么开这张支票吗？

Answer 1

我创建了一个helper类。network.kt

object Network {
    private const val NETWORK_STATUS_NOT_CONNECTED = 0
    private const val NETWORK_STATUS_WIFI = 1
    private const val NETWORK_STATUS_MOBILE = 2
    private const val TYPE_WIFI = 1
    private const val TYPE_MOBILE = 2
    private const val TYPE_NOT_CONNECTED = 0
    private fun connectivityStatus(context: Context): Int {
        val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
        val activeNetwork = connectivityManager.activeNetworkInfo
        if (null != activeNetwork) {
            if (activeNetwork.type == ConnectivityManager.TYPE_WIFI) return TYPE_WIFI
            if (activeNetwork.type == ConnectivityManager.TYPE_MOBILE) return TYPE_MOBILE
        }
        return TYPE_NOT_CONNECTED
    }


    private fun connectivityStatusString(context: Context): Int {
        val connection = connectivityStatus(context)
        var status = -1
        if (connection == TYPE_WIFI) status = NETWORK_STATUS_WIFI else if (connection == TYPE_MOBILE) status = NETWORK_STATUS_MOBILE else if (connection == TYPE_NOT_CONNECTED) status = NETWORK_STATUS_NOT_CONNECTED
        return status
    }

    fun checkConnectivity(context : Context):Boolean{
        val status = connectivityStatusString(context)
        return status == NETWORK_STATUS_WIFI || status == NETWORK_STATUS_MOBILE
    }
}

要访问它，您需要像这样使用它

if (Network.checkConnectivity(this@MainActivity))
    \\Internet is working
else
    \\No internet connectivity