Android获取Wifi连接状态 [英] Android Get Status of Wifi Connection

问题描述

我目前正在使用 NetworkRequest 和 NetworkCallback 方法(由Google官方推荐)来获取Wifi连接的状态，并且可以部分使用.

I'm currently using NetworkRequest and NetworkCallback approach (recommended by Google official) to get status of Wifi connection, and it works partially.

我希望在以下情况下调用 onUnavailable():关闭Wifi->启动应用程序，但是什么也没发生:

I'm expecting the onUnavailable() will get called when: close app -> turn off Wifi -> launch app, however there is nothing happened:

private fun getNetworkRequest(): NetworkRequest {
    return NetworkRequest.Builder()
        .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)    //restric to Wifi type only
        .build()
}

private fun getNetworkCallBack(): ConnectivityManager.NetworkCallback {
    return object : ConnectivityManager.NetworkCallback() {
        override fun onAvailable(network: Network) {            //works
            super.onAvailable(network)

            Toast.makeText(requireContext(), "Wifi is on!", Toast.LENGTH_SHORT).show()
        }

        override fun onLost(network: Network) {                 //works
            super.onLost(network)

            Toast.makeText(requireContext(), "Wifi turns off!", Toast.LENGTH_SHORT).show()
        }

        override fun onUnavailable() {                          //not works as expected
            super.onUnavailable()

            Toast.makeText(requireContext(), "Wifi unavailable!", Toast.LENGTH_SHORT).show()
        }
    }
}

fun Fragment.getConnectivityManager() = requireContext().getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

override fun onResume() {
    super.onResume()

    getConnectivityManager().registerNetworkCallback(networkRequest, networkCallback)
}

推荐答案

好，我得到了解决方案:

Ok, I got the solution:

val isWifiOn = with(getConnectivityManager()) {
    getNetworkCapabilities(activeNetwork)?.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
}

演示: https://youtu.be/OHFrtXVW4x4

这篇关于Android获取Wifi连接状态的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！