[英]Android Get Status of Wifi Connection
我目前正在使用NetworkRequest
和NetworkCallback
方法(由 Google 官方推薦)來獲取 Wifi 連接的狀態,並且它可以部分工作。
我希望onUnavailable()
會在以下情況下被調用: close app -> turn off Wifi -> launch app
,但是什么也沒發生:
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)
}
好的,我得到了解決方案:
val isWifiOn = with(getConnectivityManager()) {
getNetworkCapabilities(activeNetwork)?.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
}
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