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      1 /*
      2  * Copyright (C) 2013 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 com.android.settings.R;
     20 
     21 import android.app.Activity;
     22 import android.app.AlertDialog;
     23 import android.app.Dialog;
     24 import android.app.DialogFragment;
     25 import android.content.DialogInterface;
     26 import android.content.Intent;
     27 import android.content.pm.ApplicationInfo;
     28 import android.content.pm.PackageManager;
     29 import android.net.wifi.WifiManager;
     30 import android.os.Bundle;
     31 import android.provider.Settings;
     32 
     33 /**
     34  * This activity requests users permission to allow scanning even when Wi-Fi is turned off
     35  */
     36 public class WifiScanModeActivity extends Activity {
     37     private DialogFragment mDialog;
     38     private String mApp;
     39 
     40     @Override
     41     protected void onCreate(Bundle savedInstanceState) {
     42         super.onCreate(savedInstanceState);
     43         Intent intent = getIntent();
     44         if (savedInstanceState == null) {
     45             if (intent != null && intent.getAction()
     46                     .equals(WifiManager.ACTION_REQUEST_SCAN_ALWAYS_AVAILABLE)) {
     47                 ApplicationInfo ai;
     48                 mApp = getCallingPackage();
     49                 try {
     50                     PackageManager pm = getPackageManager();
     51                     ai = pm.getApplicationInfo(mApp, 0);
     52                     mApp = (String)pm.getApplicationLabel(ai);
     53                 } catch (PackageManager.NameNotFoundException e) { }
     54             } else {
     55                 finish();
     56                 return;
     57             }
     58         } else {
     59             mApp = savedInstanceState.getString("app");
     60         }
     61         createDialog();
     62     }
     63 
     64     private void createDialog() {
     65         if (mDialog == null) {
     66             mDialog = AlertDialogFragment.newInstance(mApp);
     67             mDialog.show(getFragmentManager(), "dialog");
     68         }
     69     }
     70 
     71     private void dismissDialog() {
     72         if (mDialog != null) {
     73             mDialog.dismiss();
     74             mDialog = null;
     75         }
     76     }
     77 
     78     private void doPositiveClick() {
     79         Settings.Global.putInt(getContentResolver(),
     80                 Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE, 1);
     81         setResult(RESULT_OK);
     82         finish();
     83     }
     84 
     85     private void doNegativeClick() {
     86         setResult(RESULT_CANCELED);
     87         finish();
     88     }
     89 
     90     @Override
     91     public void onSaveInstanceState(Bundle outState) {
     92         super.onSaveInstanceState(outState);
     93         outState.putString("app", mApp);
     94     }
     95 
     96     @Override
     97     public void onPause() {
     98         super.onPause();
     99         dismissDialog();
    100     }
    101 
    102     public void onResume() {
    103         super.onResume();
    104         createDialog();
    105     }
    106 
    107     public static class AlertDialogFragment extends DialogFragment {
    108         static AlertDialogFragment newInstance(String app) {
    109             AlertDialogFragment frag = new AlertDialogFragment(app);
    110             return frag;
    111         }
    112 
    113         private final String mApp;
    114         public AlertDialogFragment(String app) {
    115             super();
    116             mApp = app;
    117         }
    118 
    119         public AlertDialogFragment() {
    120             super();
    121             mApp = null;
    122         }
    123 
    124         @Override
    125         public Dialog onCreateDialog(Bundle savedInstanceState) {
    126             return new AlertDialog.Builder(getActivity())
    127                     .setMessage(getString(R.string.wifi_scan_always_turnon_message, mApp))
    128                     .setPositiveButton(R.string.wifi_scan_always_confirm_allow,
    129                             new DialogInterface.OnClickListener() {
    130                                 public void onClick(DialogInterface dialog, int whichButton) {
    131                                     ((WifiScanModeActivity) getActivity()).doPositiveClick();
    132                                 }
    133                             }
    134                     )
    135                     .setNegativeButton(R.string.wifi_scan_always_confirm_deny,
    136                             new DialogInterface.OnClickListener() {
    137                                 public void onClick(DialogInterface dialog, int whichButton) {
    138                                     ((WifiScanModeActivity) getActivity()).doNegativeClick();
    139                                 }
    140                             }
    141                     )
    142                     .create();
    143         }
    144         @Override
    145         public void onCancel(DialogInterface dialog) {
    146             ((WifiScanModeActivity) getActivity()).doNegativeClick();
    147         }
    148     }
    149 }
    150