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      1 /*
      2  * Copyright (C) 2016 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 package com.android.phone;
     17 
     18 import android.app.AlertDialog;
     19 import android.app.Dialog;
     20 import android.app.DialogFragment;
     21 import android.app.Fragment;
     22 import android.app.FragmentManager;
     23 import android.content.Context;
     24 import android.content.DialogInterface;
     25 import android.content.DialogInterface.OnClickListener;
     26 import android.os.Bundle;
     27 
     28 /**
     29  * A dialog fragment that asks the user if they are sure they want to turn on data roaming
     30  * to avoid accidental charges.
     31  */
     32 public class RoamingDialogFragment extends DialogFragment implements OnClickListener {
     33 
     34     /**
     35      * The interface we expect a host activity to implement.
     36      */
     37     public interface RoamingDialogListener {
     38         void onPositiveButtonClick(DialogFragment dialog);
     39     }
     40 
     41     // the host activity which implements the listening interface
     42     private RoamingDialogListener mListener;
     43 
     44 
     45     @Override
     46     public void onAttach(Context context) {
     47         super.onAttach(context);
     48         // Verify host activity implemented callback interface
     49         FragmentManager fragmentManager = getFragmentManager();
     50         Fragment fragment = fragmentManager.findFragmentById(R.id.network_setting_content);
     51         try {
     52             mListener = (RoamingDialogListener) fragment;
     53         } catch (ClassCastException e) {
     54             throw new ClassCastException(fragment.toString() +
     55                     "must implement RoamingDialogListener");
     56         }
     57     }
     58 
     59     @Override
     60     public Dialog onCreateDialog(Bundle savedInstanceState) {
     61         AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
     62         builder.setMessage(getResources().getString(R.string.roaming_warning))
     63                 .setTitle(R.string.roaming_alert_title)
     64                 .setIconAttribute(android.R.attr.alertDialogIcon)
     65                 .setPositiveButton(android.R.string.yes, this)
     66                 .setNegativeButton(android.R.string.no, this);
     67         return builder.create();
     68     }
     69 
     70     @Override
     71     public void onClick(DialogInterface dialog, int which) {
     72         // let the host know that the positive button has been clicked
     73         if (which == dialog.BUTTON_POSITIVE) {
     74             mListener.onPositiveButtonClick(this);
     75         }
     76     }
     77 }
     78