Add android.net.CaptivePortal class for captive-portal-handling-app callbacks

This new class replaces the awkward string token and ConnectivityManager APIs
used by apps handling captive portals.

Bug:21343774
Change-Id: I1a2c69edb17322715bf8422bb4216b0ea60bfd59
diff --git a/core/java/android/net/CaptivePortal.java b/core/java/android/net/CaptivePortal.java
new file mode 100644
index 0000000..ee05f28
--- /dev/null
+++ b/core/java/android/net/CaptivePortal.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed urnder 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.os.IBinder;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.os.RemoteException;
+
+/**
+ * A class allowing apps handling the {@link ConnectivityManager#ACTION_CAPTIVE_PORTAL_SIGN_IN}
+ * activity to indicate to the system different outcomes of captive portal sign in.  This class is
+ * passed as an extra named {@link ConnectivityManager#EXTRA_CAPTIVE_PORTAL} with the
+ * {@code ACTION_CAPTIVE_PORTAL_SIGN_IN} activity.
+ */
+public class CaptivePortal implements Parcelable {
+    /** @hide */
+    public static final int APP_RETURN_DISMISSED    = 0;
+    /** @hide */
+    public static final int APP_RETURN_UNWANTED     = 1;
+    /** @hide */
+    public static final int APP_RETURN_WANTED_AS_IS = 2;
+
+    private final IBinder mBinder;
+
+    /** @hide */
+    public CaptivePortal(IBinder binder) {
+        mBinder = binder;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeStrongBinder(mBinder);
+    }
+
+    public static final Parcelable.Creator<CaptivePortal> CREATOR
+            = new Parcelable.Creator<CaptivePortal>() {
+        @Override
+        public CaptivePortal createFromParcel(Parcel in) {
+            return new CaptivePortal(in.readStrongBinder());
+        }
+
+        @Override
+        public CaptivePortal[] newArray(int size) {
+            return new CaptivePortal[size];
+        }
+    };
+
+    /**
+     * Indicate to the system that the captive portal has been
+     * dismissed.  In response the framework will re-evaluate the network's
+     * connectivity and might take further action thereafter.
+     */
+    public void reportCaptivePortalDismissed() {
+        try {
+            ICaptivePortal.Stub.asInterface(mBinder).appResponse(APP_RETURN_DISMISSED);
+        } catch (RemoteException e) {
+        }
+    }
+
+    /**
+     * Indicate to the system that the user does not want to pursue signing in to the
+     * captive portal and the system should continue to prefer other networks
+     * without captive portals for use as the default active data network.  The
+     * system will not retest the network for a captive portal so as to avoid
+     * disturbing the user with further sign in to network notifications.
+     */
+    public void ignoreNetwork() {
+        try {
+            ICaptivePortal.Stub.asInterface(mBinder).appResponse(APP_RETURN_UNWANTED);
+        } catch (RemoteException e) {
+        }
+    }
+
+    /**
+     * Indicate to the system the user wants to use this network as is, even though
+     * the captive portal is still in place.  The system will treat the network
+     * as if it did not have a captive portal when selecting the network to use
+     * as the default active data network. This may result in this network
+     * becoming the default active data network, which could disrupt network
+     * connectivity for apps because the captive portal is still in place.
+     * @hide
+     */
+    public void useNetwork() {
+        try {
+            ICaptivePortal.Stub.asInterface(mBinder).appResponse(APP_RETURN_WANTED_AS_IS);
+        } catch (RemoteException e) {
+        }
+    }
+}