Dialog box for networks without an Internet connection

Bug: 20081183
Change-Id: If4866a341382fa37745ae5aa2d10372f052d5dd6

AndroidManifest.xml

@@ -309,6 +309,19 @@
             </intent-filter>
         </activity>
 
+        <activity android:name=".wifi.WifiNoInternetDialog"
+                  android:clearTaskOnLaunch="true"
+                  android:excludeFromRecents="true"
+                  android:exported="true"
+                  android:permission="android.permission.CONNECTIVITY_INTERNAL"
+                  android:taskAffinity=""
+                  android:theme="@*android:style/Theme.Material.Light.Dialog.Alert">
+            <intent-filter>
+                <action android:name="android.net.conn.PROMPT_UNVALIDATED" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+
         <!-- Suspect activity alias: targetActivity is Settings itself, does not define a name. Remove? -->
         <activity-alias android:name=".wifi.WifiApSettings"
                 android:targetActivity="Settings">

res/values/strings.xml

@@ -1568,6 +1568,10 @@
     <!-- Wifi settings button to connect in to a Hotspot. [CHAR LIMIT=50]-->
     <string name="wifi_hotspot_connect">CONNECT</string>
 
+    <!-- Dialog text to tell the user that the selected network does not have Internet access. -->
+    <string name="no_internet_access_text">This network has no Internet access. Use this network anyway?</string>
+    <string name="no_internet_access_remember">Don\'t ask again for this network</string>
+
     <!-- Button label to connect to a Wi-Fi network -->
     <string name="wifi_connect">Connect</string>
     <!-- Failured notification for connect -->

src/com/android/settings/wifi/WifiNoInternetDialog.java

@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2015 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 com.android.settings.wifi;
+
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.Network;
+import android.net.NetworkInfo;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.CheckBox;
+import android.widget.TextView;
+
+import com.android.internal.app.AlertActivity;
+import com.android.internal.app.AlertController;
+import com.android.settings.R;
+
+public final class WifiNoInternetDialog extends AlertActivity implements
+        DialogInterface.OnClickListener {
+    private static final String TAG = "WifiNoInternetDialog";
+
+    private ConnectivityManager mCM;
+    private Network mNetwork;
+    private String mNetworkName;
+    private ConnectivityManager.NetworkCallback mNetworkCallback;
+    private CheckBox mAlwaysAllow;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        final Intent intent = getIntent();
+        if (intent == null ||
+                !intent.getAction().equals(ConnectivityManager.ACTION_PROMPT_UNVALIDATED)) {
+            Log.e(TAG, "Unexpected intent " + intent + ", exiting");
+            finish();
+            return;
+        }
+
+        mNetwork = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK);
+        if (mNetwork == null) {
+            Log.e(TAG, "ACTION_PROMPT_UNVALIDATED for null network, exiting");
+            finish();
+            return;
+        }
+
+        // TODO: add a registerNetworkCallback(Network network, NetworkCallback networkCallback) and
+        // simplify this.
+        final NetworkRequest.Builder builder = new NetworkRequest.Builder();
+        for (int i = 0; i < 256; i++) {
+            try {
+                builder.removeCapability(i);
+            } catch (IllegalArgumentException e) {}
+        }
+        final NetworkRequest request = builder.build();
+        mNetworkCallback = new NetworkCallback() {
+            public void onLost(Network network) {
+                // Close the dialog if the network disconnects.
+                if (mNetwork.equals(network)) {
+                    Log.d(TAG, "Network " + mNetwork + " disconnected");
+                    finish();
+                }
+            }
+            // TODO: implement onNetworkCapabilitiesChanged so we can close the dialog if the
+            // network is now validated.
+        };
+
+        mCM = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
+        mCM.registerNetworkCallback(request, mNetworkCallback);
+
+        final NetworkInfo ni = mCM.getNetworkInfo(mNetwork);
+        if (ni == null || !ni.isConnectedOrConnecting()) {
+            Log.d(TAG, "Network " + mNetwork + " is not connected: " + ni);
+            finish();
+            return;
+        }
+        mNetworkName = ni.getExtraInfo();
+        if (mNetworkName != null) {
+            mNetworkName = mNetworkName.replaceAll("^\"|\"$", "");  // Remove double quotes
+        }
+
+        createDialog();
+    }
+
+    private void createDialog() {
+        mAlert.setIcon(R.drawable.ic_settings_wireless);
+
+        final AlertController.AlertParams ap = mAlertParams;
+        ap.mTitle = mNetworkName;
+        ap.mMessage = getString(R.string.no_internet_access_text);
+        ap.mPositiveButtonText = getString(android.R.string.ok);
+        ap.mNegativeButtonText = getString(android.R.string.cancel);
+        ap.mPositiveButtonListener = this;
+        ap.mNegativeButtonListener = this;
+
+        final LayoutInflater inflater = LayoutInflater.from(ap.mContext);
+        final View checkbox = inflater.inflate(
+                com.android.internal.R.layout.always_use_checkbox, null);
+        ap.mView = checkbox;
+
+        mAlwaysAllow = (CheckBox) checkbox.findViewById(com.android.internal.R.id.alwaysUse);
+        mAlwaysAllow.setText(getString(R.string.no_internet_access_remember));
+
+        setupAlert();
+    }
+
+    @Override
+    protected void onDestroy() {
+        if (mNetworkCallback != null) {
+            mCM.unregisterNetworkCallback(mNetworkCallback);
+            mNetworkCallback = null;
+        }
+        super.onDestroy();
+    }
+
+    public void onClick(DialogInterface dialog, int which) {
+        final boolean accept = (which == BUTTON_POSITIVE);
+        final String action = (accept ? "Connect" : "Ignore");
+        final boolean always = mAlwaysAllow.isChecked();
+
+        switch (which) {
+            case BUTTON_POSITIVE:
+            case BUTTON_NEGATIVE:
+                mCM.setAcceptUnvalidated(mNetwork, accept, always);
+                Log.d(TAG, action +  " network=" + mNetwork + (always ? " and remember" : ""));
+                break;
+            default:
+                break;
+        }
+    }
+}