Java tutorial
/* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package android.net; import android.annotation.UnsupportedAppUsage; import android.os.Build; import android.os.Parcel; import android.os.Parcelable; import android.util.Slog; /** * Snapshot of network state. * * @hide */ public class NetworkState implements Parcelable { private static final boolean SANITY_CHECK_ROAMING = false; public static final NetworkState EMPTY = new NetworkState(null, null, null, null, null, null); public final NetworkInfo networkInfo; public final LinkProperties linkProperties; public final NetworkCapabilities networkCapabilities; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) public final Network network; public final String subscriberId; public final String networkId; public NetworkState(NetworkInfo networkInfo, LinkProperties linkProperties, NetworkCapabilities networkCapabilities, Network network, String subscriberId, String networkId) { this.networkInfo = networkInfo; this.linkProperties = linkProperties; this.networkCapabilities = networkCapabilities; this.network = network; this.subscriberId = subscriberId; this.networkId = networkId; // This object is an atomic view of a network, so the various components // should always agree on roaming state. if (SANITY_CHECK_ROAMING && networkInfo != null && networkCapabilities != null) { if (networkInfo.isRoaming() == networkCapabilities .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING)) { Slog.wtf("NetworkState", "Roaming state disagreement between " + networkInfo + " and " + networkCapabilities); } } } @UnsupportedAppUsage public NetworkState(Parcel in) { networkInfo = in.readParcelable(null); linkProperties = in.readParcelable(null); networkCapabilities = in.readParcelable(null); network = in.readParcelable(null); subscriberId = in.readString(); networkId = in.readString(); } @Override public int describeContents() { return 0; } @Override public void writeToParcel(Parcel out, int flags) { out.writeParcelable(networkInfo, flags); out.writeParcelable(linkProperties, flags); out.writeParcelable(networkCapabilities, flags); out.writeParcelable(network, flags); out.writeString(subscriberId); out.writeString(networkId); } @UnsupportedAppUsage public static final Creator<NetworkState> CREATOR = new Creator<NetworkState>() { @Override public NetworkState createFromParcel(Parcel in) { return new NetworkState(in); } @Override public NetworkState[] newArray(int size) { return new NetworkState[size]; } }; }