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.pm.ActivityInfo;
22 import android.os.AsyncTask;
23 import android.service.persistentdata.PersistentDataBlockManager;
24 import com.android.internal.os.storage.ExternalStorageFormatter;
25 
26 import android.app.Fragment;
27 import android.content.Intent;
28 import android.os.Bundle;
29 import android.os.UserManager;
30 import android.view.LayoutInflater;
31 import android.view.View;
32 import android.view.ViewGroup;
33 import android.widget.Button;
34 
35 /**
36  * Confirm and execute a reset of the device to a clean "just out of the box"
37  * state.  Multiple confirmations are required: first, a general "are you sure
38  * you want to do this?" prompt, followed by a keyguard pattern trace if the user
39  * has defined one, followed by a final strongly-worded "THIS WILL ERASE EVERYTHING
40  * ON THE PHONE" prompt.  If at any time the phone is allowed to go to sleep, is
41  * locked, et cetera, then the confirmation sequence is abandoned.
42  *
43  * This is the confirmation screen.
44  */
45 public class MasterClearConfirm extends Fragment {
46 
47     private View mContentView;
48     private boolean mEraseSdCard;
49 
50     /**
51      * The user has gone through the multiple confirmation, so now we go ahead
52      * and invoke the Checkin Service to reset the device to its factory-default
53      * state (rebooting in the process).
54      */
55     private Button.OnClickListener mFinalClickListener = new Button.OnClickListener() {
56 
57         public void onClick(View v) {
58             if (Utils.isMonkeyRunning()) {
59                 return;
60             }
61 
62             final PersistentDataBlockManager pdbManager = (PersistentDataBlockManager)
63                     getActivity().getSystemService(Context.PERSISTENT_DATA_BLOCK_SERVICE);
64 
65             if (pdbManager != null && !pdbManager.getOemUnlockEnabled()) {
66                 // if OEM unlock is enabled, this will be wiped during FR process.
67                 final ProgressDialog progressDialog = getProgressDialog();
68                 progressDialog.show();
69 
70                 // need to prevent orientation changes as we're about to go into
71                 // a long IO request, so we won't be able to access inflate resources on flash
72                 final int oldOrientation = getActivity().getRequestedOrientation();
73                 getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LOCKED);
74                 new AsyncTask<Void, Void, Void>() {
75                     @Override
76                     protected Void doInBackground(Void... params) {
77                         pdbManager.wipe();
78                         return null;
79                     }
80 
81                     @Override
82                     protected void onPostExecute(Void aVoid) {
83                         progressDialog.hide();
84                         getActivity().setRequestedOrientation(oldOrientation);
85                         doMasterClear();
86                     }
87                 }.execute();
88             } else {
89                 doMasterClear();
90             }
91         }
92 
93         private ProgressDialog getProgressDialog() {
94             final ProgressDialog progressDialog = new ProgressDialog(getActivity());
95             progressDialog.setIndeterminate(true);
96             progressDialog.setCancelable(false);
97             progressDialog.setTitle(
98                     getActivity().getString(R.string.master_clear_progress_title));
99             progressDialog.setMessage(
100                     getActivity().getString(R.string.master_clear_progress_text));
101             return progressDialog;
102         }
103     };
104 
doMasterClear()105     private void doMasterClear() {
106         if (mEraseSdCard) {
107             Intent intent = new Intent(ExternalStorageFormatter.FORMAT_AND_FACTORY_RESET);
108             intent.putExtra(Intent.EXTRA_REASON, "MasterClearConfirm");
109             intent.setComponent(ExternalStorageFormatter.COMPONENT_NAME);
110             getActivity().startService(intent);
111         } else {
112             Intent intent = new Intent(Intent.ACTION_MASTER_CLEAR);
113             intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
114             intent.putExtra(Intent.EXTRA_REASON, "MasterClearConfirm");
115             getActivity().sendBroadcast(intent);
116             // Intent handling is asynchronous -- assume it will happen soon.
117         }
118     }
119 
120     /**
121      * Configure the UI for the final confirmation interaction
122      */
establishFinalConfirmationState()123     private void establishFinalConfirmationState() {
124         mContentView.findViewById(R.id.execute_master_clear)
125                 .setOnClickListener(mFinalClickListener);
126     }
127 
128     @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)129     public View onCreateView(LayoutInflater inflater, ViewGroup container,
130             Bundle savedInstanceState) {
131         if (UserManager.get(getActivity()).hasUserRestriction(
132                 UserManager.DISALLOW_FACTORY_RESET)) {
133             return inflater.inflate(R.layout.master_clear_disallowed_screen, null);
134         }
135         mContentView = inflater.inflate(R.layout.master_clear_confirm, null);
136         establishFinalConfirmationState();
137         return mContentView;
138     }
139 
140     @Override
onCreate(Bundle savedInstanceState)141     public void onCreate(Bundle savedInstanceState) {
142         super.onCreate(savedInstanceState);
143 
144         Bundle args = getArguments();
145         mEraseSdCard = args != null && args.getBoolean(MasterClear.ERASE_EXTERNAL_EXTRA);
146     }
147 }
148