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 { onPositiveButtonClick(DialogFragment dialog)38 void onPositiveButtonClick(DialogFragment dialog); 39 } 40 41 // the host activity which implements the listening interface 42 private RoamingDialogListener mListener; 43 44 45 @Override onAttach(Context context)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 onCreateDialog(Bundle savedInstanceState)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 onClick(DialogInterface dialog, int which)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