1 /*
2  * Copyright (C) 2010 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;
18 
19 import android.app.ProgressDialog;
20 import android.content.Context;
21 import android.content.Intent;
22 import android.content.pm.ActivityInfo;
23 import android.os.AsyncTask;
24 import android.os.Bundle;
25 import android.os.UserHandle;
26 import android.os.UserManager;
27 import android.provider.Settings;
28 import android.service.persistentdata.PersistentDataBlockManager;
29 import android.view.LayoutInflater;
30 import android.view.View;
31 import android.view.ViewGroup;
32 import android.widget.Button;
33 import android.widget.TextView;
34 
35 import com.android.internal.logging.MetricsProto.MetricsEvent;
36 import com.android.settingslib.RestrictedLockUtils;
37 
38 import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
39 
40 /**
41  * Confirm and execute a reset of the device to a clean "just out of the box"
42  * state.  Multiple confirmations are required: first, a general "are you sure
43  * you want to do this?" prompt, followed by a keyguard pattern trace if the user
44  * has defined one, followed by a final strongly-worded "THIS WILL ERASE EVERYTHING
45  * ON THE PHONE" prompt.  If at any time the phone is allowed to go to sleep, is
46  * locked, et cetera, then the confirmation sequence is abandoned.
47  *
48  * This is the confirmation screen.
49  */
50 public class MasterClearConfirm extends OptionsMenuFragment {
51 
52     private View mContentView;
53     private boolean mEraseSdCard;
54 
55     /**
56      * The user has gone through the multiple confirmation, so now we go ahead
57      * and invoke the Checkin Service to reset the device to its factory-default
58      * state (rebooting in the process).
59      */
60     private Button.OnClickListener mFinalClickListener = new Button.OnClickListener() {
61 
62         public void onClick(View v) {
63             if (Utils.isMonkeyRunning()) {
64                 return;
65             }
66 
67             final PersistentDataBlockManager pdbManager = (PersistentDataBlockManager)
68                     getActivity().getSystemService(Context.PERSISTENT_DATA_BLOCK_SERVICE);
69 
70             if (pdbManager != null && !pdbManager.getOemUnlockEnabled() &&
71                     Utils.isDeviceProvisioned(getActivity())) {
72                 // if OEM unlock is enabled, this will be wiped during FR process. If disabled, it
73                 // will be wiped here, unless the device is still being provisioned, in which case
74                 // the persistent data block will be preserved.
75                 new AsyncTask<Void, Void, Void>() {
76                     int mOldOrientation;
77                     ProgressDialog mProgressDialog;
78 
79                     @Override
80                     protected Void doInBackground(Void... params) {
81                         pdbManager.wipe();
82                         return null;
83                     }
84 
85                     @Override
86                     protected void onPostExecute(Void aVoid) {
87                         mProgressDialog.hide();
88                         if (getActivity() != null) {
89                             getActivity().setRequestedOrientation(mOldOrientation);
90                             doMasterClear();
91                         }
92                     }
93 
94                     @Override
95                     protected void onPreExecute() {
96                         mProgressDialog = getProgressDialog();
97                         mProgressDialog.show();
98 
99                         // need to prevent orientation changes as we're about to go into
100                         // a long IO request, so we won't be able to access inflate resources on flash
101                         mOldOrientation = getActivity().getRequestedOrientation();
102                         getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LOCKED);
103                     }
104                 }.execute();
105             } else {
106                 doMasterClear();
107             }
108         }
109 
110         private ProgressDialog getProgressDialog() {
111             final ProgressDialog progressDialog = new ProgressDialog(getActivity());
112             progressDialog.setIndeterminate(true);
113             progressDialog.setCancelable(false);
114             progressDialog.setTitle(
115                     getActivity().getString(R.string.master_clear_progress_title));
116             progressDialog.setMessage(
117                     getActivity().getString(R.string.master_clear_progress_text));
118             return progressDialog;
119         }
120     };
121 
doMasterClear()122     private void doMasterClear() {
123         Intent intent = new Intent(Intent.ACTION_MASTER_CLEAR);
124         intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
125         intent.putExtra(Intent.EXTRA_REASON, "MasterClearConfirm");
126         intent.putExtra(Intent.EXTRA_WIPE_EXTERNAL_STORAGE, mEraseSdCard);
127         getActivity().sendBroadcast(intent);
128         // Intent handling is asynchronous -- assume it will happen soon.
129     }
130 
131     /**
132      * Configure the UI for the final confirmation interaction
133      */
establishFinalConfirmationState()134     private void establishFinalConfirmationState() {
135         mContentView.findViewById(R.id.execute_master_clear)
136                 .setOnClickListener(mFinalClickListener);
137     }
138 
139     @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)140     public View onCreateView(LayoutInflater inflater, ViewGroup container,
141             Bundle savedInstanceState) {
142         final EnforcedAdmin admin = RestrictedLockUtils.checkIfRestrictionEnforced(
143                 getActivity(), UserManager.DISALLOW_FACTORY_RESET, UserHandle.myUserId());
144         if (RestrictedLockUtils.hasBaseUserRestriction(getActivity(),
145                 UserManager.DISALLOW_FACTORY_RESET, UserHandle.myUserId())) {
146             return inflater.inflate(R.layout.master_clear_disallowed_screen, null);
147         } else if (admin != null) {
148             View view = inflater.inflate(R.layout.admin_support_details_empty_view, null);
149             ShowAdminSupportDetailsDialog.setAdminSupportDetails(getActivity(), view, admin, false);
150             view.setVisibility(View.VISIBLE);
151             return view;
152         }
153         mContentView = inflater.inflate(R.layout.master_clear_confirm, null);
154         establishFinalConfirmationState();
155         setAccessibilityTitle();
156         return mContentView;
157     }
158 
setAccessibilityTitle()159     private void setAccessibilityTitle() {
160         CharSequence currentTitle = getActivity().getTitle();
161         TextView confirmationMessage =
162                 (TextView) mContentView.findViewById(R.id.master_clear_confirm);
163         if (confirmationMessage != null) {
164             String accessibileText = new StringBuilder(currentTitle).append(",").append(
165                     confirmationMessage.getText()).toString();
166             getActivity().setTitle(Utils.createAccessibleSequence(currentTitle, accessibileText));
167         }
168     }
169 
170     @Override
onCreate(Bundle savedInstanceState)171     public void onCreate(Bundle savedInstanceState) {
172         super.onCreate(savedInstanceState);
173 
174         Bundle args = getArguments();
175         mEraseSdCard = args != null
176                 && args.getBoolean(MasterClear.ERASE_EXTERNAL_EXTRA);
177     }
178 
179     @Override
getMetricsCategory()180     protected int getMetricsCategory() {
181         return MetricsEvent.MASTER_CLEAR_CONFIRM;
182     }
183 }
184