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| 1 | +package com.mux.stats.sdk.muxstats |
| 2 | + |
| 3 | +import android.content.BroadcastReceiver |
| 4 | +import android.content.Context |
| 5 | +import android.content.Intent |
| 6 | +import android.content.IntentFilter |
| 7 | +import android.net.ConnectivityManager |
| 8 | +import android.net.Network |
| 9 | +import android.net.NetworkCapabilities |
| 10 | +import android.net.NetworkInfo |
| 11 | +import android.os.Build |
| 12 | +import android.os.Handler |
| 13 | +import android.os.Looper |
| 14 | +import androidx.annotation.RequiresApi |
| 15 | + |
| 16 | +/** |
| 17 | + * Listens for changes to network connection status from the system. |
| 18 | + * |
| 19 | + * The implementation may differ depending on android version |
| 20 | + */ |
| 21 | +interface NetworkChangeMonitor { |
| 22 | + companion object { |
| 23 | + const val CONNECTION_TYPE_CELLULAR = "cellular" |
| 24 | + const val CONNECTION_TYPE_WIFI = "wifi" |
| 25 | + const val CONNECTION_TYPE_WIRED = "wired" |
| 26 | + const val CONNECTION_TYPE_OTHER = "other" |
| 27 | + } |
| 28 | + |
| 29 | + fun setListener(listener: NetworkChangedListener?) |
| 30 | + |
| 31 | + fun release() |
| 32 | + |
| 33 | + fun interface NetworkChangedListener { |
| 34 | + fun onNetworkChanged(networkType: String?, restrictedData: Boolean?) |
| 35 | + } |
| 36 | +} |
| 37 | + |
| 38 | +@JvmSynthetic |
| 39 | +internal fun NetworkChangeMonitor( |
| 40 | + context: Context, |
| 41 | +): NetworkChangeMonitor { |
| 42 | + return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { |
| 43 | + NetworkChangeMonitorApi26(context.applicationContext) |
| 44 | + } else { |
| 45 | + NetworkChangeMonitorApi16(context.applicationContext) |
| 46 | + } |
| 47 | +} |
| 48 | + |
| 49 | +@JvmSynthetic |
| 50 | +@RequiresApi(Build.VERSION_CODES.M) |
| 51 | +internal fun NetworkCapabilities.toMuxConnectionType(): String { |
| 52 | + return when { |
| 53 | + hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET) |
| 54 | + -> NetworkChangeMonitor.CONNECTION_TYPE_WIRED |
| 55 | + |
| 56 | + hasTransport(NetworkCapabilities.TRANSPORT_WIFI) |
| 57 | + -> NetworkChangeMonitor.CONNECTION_TYPE_WIFI |
| 58 | + |
| 59 | + hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) |
| 60 | + -> NetworkChangeMonitor.CONNECTION_TYPE_CELLULAR |
| 61 | + |
| 62 | + else -> NetworkChangeMonitor.CONNECTION_TYPE_OTHER |
| 63 | + } |
| 64 | +} |
| 65 | + |
| 66 | +@Suppress("DEPRECATION") |
| 67 | +@JvmSynthetic |
| 68 | +internal fun NetworkInfo.toMuxConnectionType(): String { |
| 69 | + return when (type) { |
| 70 | + ConnectivityManager.TYPE_ETHERNET -> NetworkChangeMonitor.CONNECTION_TYPE_WIRED |
| 71 | + |
| 72 | + ConnectivityManager.TYPE_WIFI -> NetworkChangeMonitor.CONNECTION_TYPE_WIFI |
| 73 | + |
| 74 | + ConnectivityManager.TYPE_MOBILE, |
| 75 | + ConnectivityManager.TYPE_MOBILE_DUN, |
| 76 | + ConnectivityManager.TYPE_MOBILE_HIPRI, |
| 77 | + ConnectivityManager.TYPE_MOBILE_SUPL, |
| 78 | + ConnectivityManager.TYPE_WIMAX, |
| 79 | + ConnectivityManager.TYPE_MOBILE_MMS -> { |
| 80 | + NetworkChangeMonitor.CONNECTION_TYPE_CELLULAR |
| 81 | + } |
| 82 | + |
| 83 | + else -> NetworkChangeMonitor.CONNECTION_TYPE_OTHER |
| 84 | + |
| 85 | + } |
| 86 | +} |
| 87 | + |
| 88 | +/** |
| 89 | + * Detects changes to network status using the old BroadcastReceiver method |
| 90 | + * |
| 91 | + * We use this all the way up to O, because NetworkCallback was not reliable before then |
| 92 | + */ |
| 93 | +@Suppress("DEPRECATION") |
| 94 | +private class NetworkChangeMonitorApi16( |
| 95 | + val appContext: Context, |
| 96 | +) : NetworkChangeMonitor { |
| 97 | + |
| 98 | + private var connectivityReceiver: ConnectivityReceiver? = null |
| 99 | + private var lastSeenConnectionType: String? = null |
| 100 | + private var outsideListener: NetworkChangeMonitor.NetworkChangedListener? = null |
| 101 | + |
| 102 | + private fun getConnectivityManager(context: Context): ConnectivityManager { |
| 103 | + return context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager |
| 104 | + } |
| 105 | + |
| 106 | + private fun currentConnectionType(): String? { |
| 107 | + val networkInfo = getConnectivityManager(appContext).activeNetworkInfo |
| 108 | + val connType = networkInfo?.toMuxConnectionType() |
| 109 | + return connType |
| 110 | + } |
| 111 | + |
| 112 | + override fun setListener(listener: NetworkChangeMonitor.NetworkChangedListener?) { |
| 113 | + this.outsideListener = listener |
| 114 | + } |
| 115 | + |
| 116 | + override fun release() { |
| 117 | + outsideListener = null |
| 118 | + connectivityReceiver?.let { appContext.unregisterReceiver(it) } |
| 119 | + connectivityReceiver = null |
| 120 | + } |
| 121 | + |
| 122 | + init { |
| 123 | + this.connectivityReceiver = ConnectivityReceiver() |
| 124 | + val intentFilter = IntentFilter() |
| 125 | + intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION) |
| 126 | + appContext.registerReceiver(this.connectivityReceiver, intentFilter) |
| 127 | + } |
| 128 | + |
| 129 | + inner class ConnectivityReceiver : BroadcastReceiver() { |
| 130 | + override fun onReceive(context: Context?, intent: Intent?) { |
| 131 | + // when using the system broadcasts, we can safely query ConnectivityManager synchronously |
| 132 | + val currentType = currentConnectionType() |
| 133 | + if (currentType != lastSeenConnectionType) { |
| 134 | + outsideListener?.onNetworkChanged(currentType, null) |
| 135 | + lastSeenConnectionType = currentType |
| 136 | + } |
| 137 | + } |
| 138 | + } |
| 139 | +} |
| 140 | + |
| 141 | +/** |
| 142 | + * Detects Network changes using [ConnectivityManager.NetworkCallback]. The API is available way |
| 143 | + * before O, but isn't generally considered reliable before then. The callback method we need |
| 144 | + * (onCapabilitiesChanged) isn't guaranteed to be called, and asking for net capabilities |
| 145 | + * synchronously from onActive is a no-no because it is a source of data races. So we fall back to |
| 146 | + * the intent broadcasts L, M, and N still |
| 147 | + */ |
| 148 | +@RequiresApi(Build.VERSION_CODES.O) |
| 149 | +private class NetworkChangeMonitorApi26( |
| 150 | + val appContext: Context, |
| 151 | +) : NetworkChangeMonitor { |
| 152 | + |
| 153 | + private val callbackHandler = Handler(Looper.getMainLooper()) |
| 154 | + |
| 155 | + private var outsideListener: NetworkChangeMonitor.NetworkChangedListener? = null |
| 156 | + private var defaultNetworkCallback: ConnectivityManager.NetworkCallback? = null |
| 157 | + |
| 158 | + override fun setListener(listener: NetworkChangeMonitor.NetworkChangedListener?) { |
| 159 | + this.outsideListener = listener |
| 160 | + } |
| 161 | + |
| 162 | + override fun release() { |
| 163 | + outsideListener = null |
| 164 | + defaultNetworkCallback?.let { |
| 165 | + val connectivityManager = getConnectivityManager(appContext) |
| 166 | + connectivityManager.unregisterNetworkCallback(it) |
| 167 | + } |
| 168 | + defaultNetworkCallback = null |
| 169 | + } |
| 170 | + |
| 171 | + private fun getConnectivityManager(context: Context): ConnectivityManager { |
| 172 | + return context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager |
| 173 | + } |
| 174 | + |
| 175 | + private fun handleNetworkCapabilities(networkCapabilities: NetworkCapabilities) { |
| 176 | + val connType = networkCapabilities.toMuxConnectionType() |
| 177 | + val lowBandwidth = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.BAKLAVA) { |
| 178 | + !networkCapabilities.hasCapability( |
| 179 | + NetworkCapabilities.NET_CAPABILITY_NOT_BANDWIDTH_CONSTRAINED |
| 180 | + ) |
| 181 | + } else { |
| 182 | + null |
| 183 | + } |
| 184 | + |
| 185 | + outsideListener?.onNetworkChanged(connType, lowBandwidth) |
| 186 | + } |
| 187 | + |
| 188 | + init { |
| 189 | + val networkCallback = object : ConnectivityManager.NetworkCallback() { |
| 190 | + override fun onCapabilitiesChanged( |
| 191 | + network: Network, |
| 192 | + networkCapabilities: NetworkCapabilities |
| 193 | + ) { |
| 194 | + callbackHandler.post { handleNetworkCapabilities(networkCapabilities) } |
| 195 | + } |
| 196 | + |
| 197 | + override fun onLost(network: Network) { |
| 198 | + callbackHandler.post { outsideListener?.onNetworkChanged(null, null) } |
| 199 | + } |
| 200 | + } |
| 201 | + |
| 202 | + getConnectivityManager(appContext).registerDefaultNetworkCallback(networkCallback) |
| 203 | + this.defaultNetworkCallback = networkCallback |
| 204 | + } |
| 205 | +} |
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