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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.wifi;
     18 
     19 import android.content.Context;
     20 import android.content.DialogInterface;
     21 import android.content.Intent;
     22 import android.net.ConnectivityManager;
     23 import android.net.ConnectivityManager.NetworkCallback;
     24 import android.net.Network;
     25 import android.net.NetworkCapabilities;
     26 import android.net.NetworkInfo;
     27 import android.net.NetworkRequest;
     28 import android.net.wifi.WifiInfo;
     29 import android.os.Bundle;
     30 import android.provider.Settings;
     31 import android.util.Log;
     32 import android.view.LayoutInflater;
     33 import android.view.View;
     34 import android.widget.CheckBox;
     35 
     36 import com.android.internal.app.AlertActivity;
     37 import com.android.internal.app.AlertController;
     38 import com.android.settings.R;
     39 
     40 import static android.net.ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION;
     41 import static android.net.ConnectivityManager.ACTION_PROMPT_UNVALIDATED;
     42 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
     43 
     44 public final class WifiNoInternetDialog extends AlertActivity implements
     45         DialogInterface.OnClickListener {
     46     private static final String TAG = "WifiNoInternetDialog";
     47 
     48     private ConnectivityManager mCM;
     49     private Network mNetwork;
     50     private String mNetworkName;
     51     private ConnectivityManager.NetworkCallback mNetworkCallback;
     52     private CheckBox mAlwaysAllow;
     53     private String mAction;
     54 
     55     private boolean isKnownAction(Intent intent) {
     56         return intent.getAction().equals(ACTION_PROMPT_UNVALIDATED) ||
     57                 intent.getAction().equals(ACTION_PROMPT_LOST_VALIDATION);
     58     }
     59 
     60     @Override
     61     public void onCreate(Bundle savedInstanceState) {
     62         super.onCreate(savedInstanceState);
     63 
     64         final Intent intent = getIntent();
     65         if (intent == null || !isKnownAction(intent) || !"netId".equals(intent.getScheme())) {
     66             Log.e(TAG, "Unexpected intent " + intent + ", exiting");
     67             finish();
     68             return;
     69         }
     70 
     71         mAction = intent.getAction();
     72 
     73         try {
     74             mNetwork = new Network(Integer.parseInt(intent.getData().getSchemeSpecificPart()));
     75         } catch (NullPointerException|NumberFormatException e) {
     76             mNetwork = null;
     77         }
     78 
     79         if (mNetwork == null) {
     80             Log.e(TAG, "Can't determine network from '" + intent.getData() + "' , exiting");
     81             finish();
     82             return;
     83         }
     84 
     85         // TODO: add a registerNetworkCallback(Network network, NetworkCallback networkCallback) and
     86         // simplify this.
     87         final NetworkRequest request = new NetworkRequest.Builder().clearCapabilities().build();
     88         mNetworkCallback = new NetworkCallback() {
     89             @Override
     90             public void onLost(Network network) {
     91                 // Close the dialog if the network disconnects.
     92                 if (mNetwork.equals(network)) {
     93                     Log.d(TAG, "Network " + mNetwork + " disconnected");
     94                     finish();
     95                 }
     96             }
     97             @Override
     98             public void onCapabilitiesChanged(Network network, NetworkCapabilities nc) {
     99                 // Close the dialog if the network validates.
    100                 if (mNetwork.equals(network) && nc.hasCapability(NET_CAPABILITY_VALIDATED)) {
    101                     Log.d(TAG, "Network " + mNetwork + " validated");
    102                     finish();
    103                 }
    104             }
    105         };
    106 
    107         mCM = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    108         mCM.registerNetworkCallback(request, mNetworkCallback);
    109 
    110         final NetworkInfo ni = mCM.getNetworkInfo(mNetwork);
    111         final NetworkCapabilities nc = mCM.getNetworkCapabilities(mNetwork);
    112         if (ni == null || !ni.isConnectedOrConnecting() || nc == null) {
    113             Log.d(TAG, "Network " + mNetwork + " is not connected: " + ni);
    114             finish();
    115             return;
    116         }
    117         mNetworkName = nc.getSSID();
    118         if (mNetworkName != null) {
    119             mNetworkName = WifiInfo.removeDoubleQuotes(mNetworkName);
    120         }
    121 
    122         createDialog();
    123     }
    124 
    125     private void createDialog() {
    126         mAlert.setIcon(R.drawable.ic_settings_wireless);
    127 
    128         final AlertController.AlertParams ap = mAlertParams;
    129         if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
    130             ap.mTitle = mNetworkName;
    131             ap.mMessage = getString(R.string.no_internet_access_text);
    132             ap.mPositiveButtonText = getString(R.string.yes);
    133             ap.mNegativeButtonText = getString(R.string.no);
    134         } else {
    135             ap.mTitle = getString(R.string.lost_internet_access_title);
    136             ap.mMessage = getString(R.string.lost_internet_access_text);
    137             ap.mPositiveButtonText = getString(R.string.lost_internet_access_switch);
    138             ap.mNegativeButtonText = getString(R.string.lost_internet_access_cancel);
    139         }
    140         ap.mPositiveButtonListener = this;
    141         ap.mNegativeButtonListener = this;
    142 
    143         final LayoutInflater inflater = LayoutInflater.from(ap.mContext);
    144         final View checkbox = inflater.inflate(
    145                 com.android.internal.R.layout.always_use_checkbox, null);
    146         ap.mView = checkbox;
    147         mAlwaysAllow = (CheckBox) checkbox.findViewById(com.android.internal.R.id.alwaysUse);
    148 
    149         if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
    150             mAlwaysAllow.setText(getString(R.string.no_internet_access_remember));
    151         } else {
    152             mAlwaysAllow.setText(getString(R.string.lost_internet_access_persist));
    153         }
    154 
    155         setupAlert();
    156     }
    157 
    158     @Override
    159     protected void onDestroy() {
    160         if (mNetworkCallback != null) {
    161             mCM.unregisterNetworkCallback(mNetworkCallback);
    162             mNetworkCallback = null;
    163         }
    164         super.onDestroy();
    165     }
    166 
    167     public void onClick(DialogInterface dialog, int which) {
    168         if (which != BUTTON_NEGATIVE && which != BUTTON_POSITIVE) return;
    169         final boolean always = mAlwaysAllow.isChecked();
    170         final String what, action;
    171 
    172         if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
    173             what = "NO_INTERNET";
    174             final boolean accept = (which == BUTTON_POSITIVE);
    175             action = (accept ? "Connect" : "Ignore");
    176             mCM.setAcceptUnvalidated(mNetwork, accept, always);
    177         } else {
    178             what = "LOST_INTERNET";
    179             final boolean avoid = (which == BUTTON_POSITIVE);
    180             action = (avoid ? "Switch away" : "Get stuck");
    181             if (always) {
    182                 Settings.Global.putString(mAlertParams.mContext.getContentResolver(),
    183                         Settings.Global.NETWORK_AVOID_BAD_WIFI, avoid ? "1" : "0");
    184             } else if (avoid) {
    185                 mCM.setAvoidUnvalidated(mNetwork);
    186             }
    187         }
    188         Log.d(TAG, what + ": " + action +  " network=" + mNetwork +
    189                 (always ? " and remember" : ""));
    190     }
    191 }
    192