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      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 
    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      */
    134     private void establishFinalConfirmationState() {
    135         mContentView.findViewById(R.id.execute_master_clear)
    136                 .setOnClickListener(mFinalClickListener);
    137     }
    138 
    139     @Override
    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 
    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
    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
    180     protected int getMetricsCategory() {
    181         return MetricsEvent.MASTER_CLEAR_CONFIRM;
    182     }
    183 }
    184