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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.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 
    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      */
    123     private void establishFinalConfirmationState() {
    124         mContentView.findViewById(R.id.execute_master_clear)
    125                 .setOnClickListener(mFinalClickListener);
    126     }
    127 
    128     @Override
    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
    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