142 lines
4.1 KiB
Kotlin
142 lines
4.1 KiB
Kotlin
package jp.juggler.subwaytooter.util
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import android.content.Context
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import android.net.*
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import android.os.Build
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import jp.juggler.util.LogCategory
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import java.lang.RuntimeException
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class NetworkStateTracker(
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val context : Context
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) : ConnectivityManager.NetworkCallback() {
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companion object {
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private val log = LogCategory("NetworkStateTracker")
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private val NetworkCapabilities?.isConnected : Boolean
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get() = if(this == null) {
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log.e("isConnected: missing NetworkCapabilities.")
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false
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} else {
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this.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
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}
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}
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private val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE)
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as? ConnectivityManager
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private var lastNetwork : Network? = null
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init {
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if(Build.VERSION.SDK_INT >= 28) {
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cm?.registerDefaultNetworkCallback(this)
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lastNetwork = cm?.activeNetwork
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}
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}
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// private fun <T> tryOrNull(block : () -> T?) : T? = try {
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// block()
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// } catch(ex : Throwable) {
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// null
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// }
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// @Suppress("DEPRECATION")
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// private fun NetworkInfo?.getStateString() =
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// if(this == null) {
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// "null"
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// } else {
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// // API 28 以上で typeName と state がdeprecated になっている
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// "${tryOrNull { this.typeName }} ${tryOrNull { this.subtypeName }} ${tryOrNull { this.state }} ${tryOrNull { this.detailedState }}"
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// }
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////////////////////////////////////////////////////////////////
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// NetworkCallback
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// Called when the framework connects and has declared a new network ready for use.
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// 準備ができた
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override fun onAvailable(network : Network) {
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super.onAvailable(network)
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val nc = try {
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cm?.getNetworkCapabilities(network)?.toString()
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} catch(ex : Throwable) {
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log.e(ex, "getNetworkCapabilities failed.")
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}
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log.d("onAvailable $network $nc")
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if( cm?.getNetworkCapabilities(network).isConnected ){
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this.lastNetwork = network
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}
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}
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// Called when the network the framework connected to for this request changes capabilities but still satisfies the stated need.
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// 接続完了し、ネットワークが変わったあと
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override fun onCapabilitiesChanged(
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network : Network,
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networkCapabilities : NetworkCapabilities
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) {
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super.onCapabilitiesChanged(network, networkCapabilities)
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log.d("onCapabilitiesChanged $network, $networkCapabilities")
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if(networkCapabilities.isConnected) {
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this.lastNetwork = network
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}
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}
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// Called when the network the framework connected to for this request changes LinkProperties.
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override fun onLinkPropertiesChanged(network : Network, linkProperties : LinkProperties) {
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super.onLinkPropertiesChanged(network, linkProperties)
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log.d("onLinkPropertiesChanged $network, $linkProperties")
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if( cm?.getNetworkCapabilities(network).isConnected ){
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this.lastNetwork = network
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}
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}
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override fun onLosing(network : Network, maxMsToLive : Int) {
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super.onLosing(network, maxMsToLive)
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log.d("onLosing $network, $maxMsToLive")
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if(lastNetwork == network) lastNetwork = null
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}
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// Called when the framework has a hard loss of the network or when the graceful failure ends.
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override fun onLost(network : Network) {
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super.onLost(network)
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log.d("onLost $network")
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if(lastNetwork == network) lastNetwork = null
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}
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////////////////////////////////////////////////////////////////
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val isConnected : Boolean
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get() = when(cm) {
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null -> {
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log.e("isConnected: missing ConnectivityManager")
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true
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}
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else -> if(Build.VERSION.SDK_INT >= 23) {
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val activeNetwork = cm.activeNetwork
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if(activeNetwork == null) {
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log.e("isConnected: missing activeNetwork")
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false
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} else {
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cm.getNetworkCapabilities(activeNetwork).isConnected
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}
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} else {
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@Suppress("DEPRECATION")
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val ani = cm.activeNetworkInfo
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if(ani == null) {
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log.e("isConnected: missing activeNetworkInfo")
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false
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} else {
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@Suppress("DEPRECATION")
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ani.isConnected
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}
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}
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}
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fun checkNetworkState() {
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if(!isConnected) {
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throw RuntimeException("checkNetworkState: not connected.")
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}
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}
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} |