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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.os.Bundle;
     29 import android.provider.Settings;
     30 import android.util.Log;
     31 import android.view.LayoutInflater;
     32 import android.view.View;
     33 import android.widget.CheckBox;
     34 
     35 import com.android.internal.app.AlertActivity;
     36 import com.android.internal.app.AlertController;
     37 import com.android.settings.R;
     38 
     39 import static android.net.ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION;
     40 import static android.net.ConnectivityManager.ACTION_PROMPT_UNVALIDATED;
     41 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
     42 
     43 public final class WifiNoInternetDialog extends AlertActivity implements
     44         DialogInterface.OnClickListener {
     45     private static final String TAG = "WifiNoInternetDialog";
     46 
     47     private ConnectivityManager mCM;
     48     private Network mNetwork;
     49     private String mNetworkName;
     50     private ConnectivityManager.NetworkCallback mNetworkCallback;
     51     private CheckBox mAlwaysAllow;
     52     private String mAction;
     53 
     54     private boolean isKnownAction(Intent intent) {
     55         return intent.getAction().equals(ACTION_PROMPT_UNVALIDATED) ||
     56                 intent.getAction().equals(ACTION_PROMPT_LOST_VALIDATION);
     57     }
     58 
     59     @Override
     60     public void onCreate(Bundle savedInstanceState) {
     61         super.onCreate(savedInstanceState);
     62 
     63         final Intent intent = getIntent();
     64         if (intent == null || !isKnownAction(intent) || !"netId".equals(intent.getScheme())) {
     65             Log.e(TAG, "Unexpected intent " + intent + ", exiting");
     66             finish();
     67             return;
     68         }
     69 
     70         mAction = intent.getAction();
     71 
     72         try {
     73             mNetwork = new Network(Integer.parseInt(intent.getData().getSchemeSpecificPart()));
     74         } catch (NullPointerException|NumberFormatException e) {
     75             mNetwork = null;
     76         }
     77 
     78         if (mNetwork == null) {
     79             Log.e(TAG, "Can't determine network from '" + intent.getData() + "' , exiting");
     80             finish();
     81             return;
     82         }
     83 
     84         // TODO: add a registerNetworkCallback(Network network, NetworkCallback networkCallback) and
     85         // simplify this.
     86         final NetworkRequest request = new NetworkRequest.Builder().clearCapabilities().build();
     87         mNetworkCallback = new NetworkCallback() {
     88             @Override
     89             public void onLost(Network network) {
     90                 // Close the dialog if the network disconnects.
     91                 if (mNetwork.equals(network)) {
     92                     Log.d(TAG, "Network " + mNetwork + " disconnected");
     93                     finish();
     94                 }
     95             }
     96             @Override
     97             public void onCapabilitiesChanged(Network network, NetworkCapabilities nc) {
     98                 // Close the dialog if the network validates.
     99                 if (mNetwork.equals(network) && nc.hasCapability(NET_CAPABILITY_VALIDATED)) {
    100                     Log.d(TAG, "Network " + mNetwork + " validated");
    101                     finish();
    102                 }
    103             }
    104         };
    105 
    106         mCM = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    107         mCM.registerNetworkCallback(request, mNetworkCallback);
    108 
    109         final NetworkInfo ni = mCM.getNetworkInfo(mNetwork);
    110         if (ni == null || !ni.isConnectedOrConnecting()) {
    111             Log.d(TAG, "Network " + mNetwork + " is not connected: " + ni);
    112             finish();
    113             return;
    114         }
    115         mNetworkName = ni.getExtraInfo();
    116         if (mNetworkName != null) {
    117             mNetworkName = mNetworkName.replaceAll("^\"|\"$", "");  // Remove double quotes
    118         }
    119 
    120         createDialog();
    121     }
    122 
    123     private void createDialog() {
    124         mAlert.setIcon(R.drawable.ic_settings_wireless);
    125 
    126         final AlertController.AlertParams ap = mAlertParams;
    127         if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
    128             ap.mTitle = mNetworkName;
    129             ap.mMessage = getString(R.string.no_internet_access_text);
    130             ap.mPositiveButtonText = getString(R.string.yes);
    131             ap.mNegativeButtonText = getString(R.string.no);
    132         } else {
    133             ap.mTitle = getString(R.string.lost_internet_access_title);
    134             ap.mMessage = getString(R.string.lost_internet_access_text);
    135             ap.mPositiveButtonText = getString(R.string.lost_internet_access_switch);
    136             ap.mNegativeButtonText = getString(R.string.lost_internet_access_cancel);
    137         }
    138         ap.mPositiveButtonListener = this;
    139         ap.mNegativeButtonListener = this;
    140 
    141         final LayoutInflater inflater = LayoutInflater.from(ap.mContext);
    142         final View checkbox = inflater.inflate(
    143                 com.android.internal.R.layout.always_use_checkbox, null);
    144         ap.mView = checkbox;
    145         mAlwaysAllow = (CheckBox) checkbox.findViewById(com.android.internal.R.id.alwaysUse);
    146 
    147         if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
    148             mAlwaysAllow.setText(getString(R.string.no_internet_access_remember));
    149         } else {
    150             mAlwaysAllow.setText(getString(R.string.lost_internet_access_persist));
    151         }
    152 
    153         setupAlert();
    154     }
    155 
    156     @Override
    157     protected void onDestroy() {
    158         if (mNetworkCallback != null) {
    159             mCM.unregisterNetworkCallback(mNetworkCallback);
    160             mNetworkCallback = null;
    161         }
    162         super.onDestroy();
    163     }
    164 
    165     public void onClick(DialogInterface dialog, int which) {
    166         if (which != BUTTON_NEGATIVE && which != BUTTON_POSITIVE) return;
    167         final boolean always = mAlwaysAllow.isChecked();
    168         final String what, action;
    169 
    170         if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {
    171             what = "NO_INTERNET";
    172             final boolean accept = (which == BUTTON_POSITIVE);
    173             action = (accept ? "Connect" : "Ignore");
    174             mCM.setAcceptUnvalidated(mNetwork, accept, always);
    175         } else {
    176             what = "LOST_INTERNET";
    177             final boolean avoid = (which == BUTTON_POSITIVE);
    178             action = (avoid ? "Switch away" : "Get stuck");
    179             if (always) {
    180                 Settings.Global.putString(mAlertParams.mContext.getContentResolver(),
    181                         Settings.Global.NETWORK_AVOID_BAD_WIFI, avoid ? "1" : "0");
    182             } else if (avoid) {
    183                 mCM.setAvoidUnvalidated(mNetwork);
    184             }
    185         }
    186         Log.d(TAG, what + ": " + action +  " network=" + mNetwork +
    187                 (always ? " and remember" : ""));
    188     }
    189 }
    190