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| import android.content.Context | |
| import android.net.ConnectivityManager | |
| import android.net.Network | |
| import android.net.NetworkCapabilities | |
| import android.net.NetworkRequest | |
| import androidx.lifecycle.LiveData | |
| object NetworkDetectorLiveData : LiveData<Boolean>() { | |
| private val manager: ConnectivityManager by lazy { | |
| ManagementApp.instance.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager | |
| } | |
| private var connectionCnt = 0 | |
| private val netCallback= object: ConnectivityManager.NetworkCallback(){ | |
| override fun onAvailable(network: Network) { | |
| postValue(true) | |
| connectionCnt++ | |
| super.onAvailable(network) | |
| } | |
| override fun onLost(network: Network) { | |
| connectionCnt-- | |
| if (connectionCnt == 0) { | |
| postValue(false) | |
| } | |
| super.onLost(network) | |
| } | |
| } | |
| override fun onActive() { | |
| connectionCnt = 0 | |
| val networkRequest = NetworkRequest.Builder() | |
| .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) | |
| .build() | |
| manager.registerNetworkCallback(networkRequest, netCallback) | |
| } | |
| override fun onInactive() { | |
| connectionCnt = 0 | |
| manager.unregisterNetworkCallback(netCallback) | |
| } | |
| } |
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