src/com/android/settings/MasterClear.java - LeafOS-Project/android_packages_apps_Settings - Gitiles

 /*
  * Copyright (C) 2008 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.settings;

 import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;

 import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.accounts.AuthenticatorDescription;
 import android.app.Activity;
 import android.app.FragmentManager;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.UserInfo;
 import android.content.res.Resources;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.SystemProperties;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
 import android.support.annotation.VisibleForTesting;
 import android.telephony.euicc.EuiccManager;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnScrollChangeListener;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver.OnGlobalLayoutListener;
 import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.ScrollView;
 import android.widget.TextView;

 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.password.ChooseLockSettingsHelper;
 import com.android.settings.password.ConfirmLockPattern;
 import com.android.settings.widget.CarrierDemoPasswordDialogFragment;
 import com.android.settingslib.RestrictedLockUtils;

 import java.util.List;

 /**
  * Confirm and execute a reset of the device to a clean "just out of the box"
  * state.  Multiple confirmations are required: first, a general "are you sure
  * you want to do this?" prompt, followed by a keyguard pattern trace if the user
  * has defined one, followed by a final strongly-worded "THIS WILL ERASE EVERYTHING
  * ON THE PHONE" prompt.  If at any time the phone is allowed to go to sleep, is
  * locked, et cetera, then the confirmation sequence is abandoned.
  *
  * This is the initial screen.
  */
 public class MasterClear extends OptionsMenuFragment
         implements CarrierDemoPasswordDialogFragment.Callback {
     private static final String TAG = "MasterClear";

     private static final int KEYGUARD_REQUEST = 55;

     static final String ERASE_EXTERNAL_EXTRA = "erase_sd";
     static final String ERASE_ESIMS_EXTRA = "erase_esim";

     private View mContentView;
     private Button mInitiateButton;
     private View mExternalStorageContainer;
     @VisibleForTesting CheckBox mExternalStorage;
     private View mEsimStorageContainer;
     @VisibleForTesting CheckBox mEsimStorage;
     private ScrollView mScrollView;

     private final OnGlobalLayoutListener mOnGlobalLayoutListener = new OnGlobalLayoutListener() {
         @Override
         public void onGlobalLayout() {
             mScrollView.getViewTreeObserver().removeOnGlobalLayoutListener(mOnGlobalLayoutListener);
             mInitiateButton.setEnabled(hasReachedBottom(mScrollView));
         }
     };

     /**
      * Keyguard validation is run using the standard {@link ConfirmLockPattern}
      * component as a subactivity
      * @param request the request code to be returned once confirmation finishes
      * @return true if confirmation launched
      */
     private boolean runKeyguardConfirmation(int request) {
         Resources res = getActivity().getResources();
         return new ChooseLockSettingsHelper(getActivity(), this).launchConfirmationActivity(
                 request, res.getText(R.string.master_clear_title));
     }

     @Override
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);

         if (requestCode != KEYGUARD_REQUEST) {
             return;
         }

         // If the user entered a valid keyguard trace, present the final
         // confirmation prompt; otherwise, go back to the initial state.
         if (resultCode == Activity.RESULT_OK) {
             showFinalConfirmation();
         } else {
             establishInitialState();
         }
     }

     @VisibleForTesting
     void showFinalConfirmation() {
         Bundle args = new Bundle();
         args.putBoolean(ERASE_EXTERNAL_EXTRA, mExternalStorage.isChecked());
         args.putBoolean(ERASE_ESIMS_EXTRA, mEsimStorage.isChecked());
         ((SettingsActivity) getActivity()).startPreferencePanel(
                 this, MasterClearConfirm.class.getName(),
                 args, R.string.master_clear_confirm_title, null, null, 0);
     }

     /**
      * If the user clicks to begin the reset sequence, we next require a
      * keyguard confirmation if the user has currently enabled one.  If there
      * is no keyguard available, we simply go to the final confirmation prompt.
      */
     private final Button.OnClickListener mInitiateListener = new Button.OnClickListener() {

         public void onClick(View v) {
             if ( Utils.isCarrierDemoUser(v.getContext())) {
                 // Require the carrier password before displaying the final confirmation.
                 final FragmentManager fm = getChildFragmentManager();
                 if (fm != null && !fm.isDestroyed()) {
                     new CarrierDemoPasswordDialogFragment().show(fm, null /* tag */);
                 }
             } else if (!runKeyguardConfirmation(KEYGUARD_REQUEST)) {
                 showFinalConfirmation();
             }
         }
     };

     @Override
     public void onPasswordVerified() {
         showFinalConfirmation();
     }

     /**
      * In its initial state, the activity presents a button for the user to
      * click in order to initiate a confirmation sequence.  This method is
      * called from various other points in the code to reset the activity to
      * this base state.
      *
      * <p>Reinflating views from resources is expensive and prevents us from
      * caching widget pointers, so we use a single-inflate pattern:  we lazy-
      * inflate each view, caching all of the widget pointers we'll need at the
      * time, then simply reuse the inflated views directly whenever we need
      * to change contents.
      */
     private void establishInitialState() {
         mInitiateButton = (Button) mContentView.findViewById(R.id.initiate_master_clear);
         mInitiateButton.setOnClickListener(mInitiateListener);
         mExternalStorageContainer = mContentView.findViewById(R.id.erase_external_container);
         mExternalStorage = (CheckBox) mContentView.findViewById(R.id.erase_external);
         mEsimStorageContainer = mContentView.findViewById(R.id.erase_esim_container);
         mEsimStorage = (CheckBox) mContentView.findViewById(R.id.erase_esim);
         mScrollView = (ScrollView) mContentView.findViewById(R.id.master_clear_scrollview);

         /*
          * If the external storage is emulated, it will be erased with a factory
          * reset at any rate. There is no need to have a separate option until
          * we have a factory reset that only erases some directories and not
          * others. Likewise, if it's non-removable storage, it could potentially have been
          * encrypted, and will also need to be wiped.
          */
         boolean isExtStorageEmulated = Environment.isExternalStorageEmulated();
         if (isExtStorageEmulated
                 || (!Environment.isExternalStorageRemovable() && isExtStorageEncrypted())) {
             mExternalStorageContainer.setVisibility(View.GONE);

             final View externalOption = mContentView.findViewById(R.id.erase_external_option_text);
             externalOption.setVisibility(View.GONE);

             final View externalAlsoErased = mContentView.findViewById(R.id.also_erases_external);
             externalAlsoErased.setVisibility(View.VISIBLE);

             // If it's not emulated, it is on a separate partition but it means we're doing
             // a force wipe due to encryption.
             mExternalStorage.setChecked(!isExtStorageEmulated);
         } else {
             mExternalStorageContainer.setOnClickListener(new View.OnClickListener() {

                 @Override
                 public void onClick(View v) {
                     mExternalStorage.toggle();
                 }
             });
         }

         if (showWipeEuicc()) {
             mEsimStorageContainer.setOnClickListener(new View.OnClickListener() {

                 @Override
                 public void onClick(View v) {
                     mEsimStorage.toggle();
                 }
             });
         } else {
             mEsimStorageContainer.setVisibility(View.GONE);
         }

         final UserManager um = (UserManager) getActivity().getSystemService(Context.USER_SERVICE);
         loadAccountList(um);
         StringBuffer contentDescription = new StringBuffer();
         View masterClearContainer = mContentView.findViewById(R.id.master_clear_container);
         getContentDescription(masterClearContainer, contentDescription);
         masterClearContainer.setContentDescription(contentDescription);

         // Set the status of initiateButton based on scrollview
         mScrollView.setOnScrollChangeListener(new OnScrollChangeListener() {
             @Override
             public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX,
                 int oldScrollY) {
                 if (v instanceof ScrollView && hasReachedBottom((ScrollView) v)) {
                     mInitiateButton.setEnabled(true);
                 }
             }
         });

         // Set the initial state of the initiateButton
         mScrollView.getViewTreeObserver().addOnGlobalLayoutListener(mOnGlobalLayoutListener);
     }

     /**
      * Whether to show the checkbox to wipe the eUICC.
      *
      * <p>We show the checkbox on any device which supports eUICC as long as either the eUICC was
      * ever provisioned (that is, at least one profile was ever downloaded onto it), or if the user
      * has enabled development mode.
      */
     @VisibleForTesting
     boolean showWipeEuicc() {
         Context context = getContext();
         if (!isEuiccEnabled(context)) {
             return false;
         }
         ContentResolver cr = context.getContentResolver();
         return Settings.Global.getInt(cr, Settings.Global.EUICC_PROVISIONED, 0) != 0
                 || Settings.Global.getInt(cr, Settings.Global.DEVELOPMENT_SETTINGS_ENABLED, 0) != 0;
     }

     @VisibleForTesting
     protected boolean isEuiccEnabled(Context context) {
         EuiccManager euiccManager = (EuiccManager) context.getSystemService(Context.EUICC_SERVICE);
         return euiccManager.isEnabled();
     }

     @VisibleForTesting
     boolean hasReachedBottom(final ScrollView scrollView) {
         if (scrollView.getChildCount() < 1) {
             return true;
         }

         final View view = scrollView.getChildAt(0);
         final int diff = view.getBottom() - (scrollView.getHeight() + scrollView.getScrollY());

         return diff <= 0;
     }

     private void getContentDescription(View v, StringBuffer description) {
        if (v.getVisibility() != View.VISIBLE) {
            return;
        }
        if (v instanceof ViewGroup) {
            ViewGroup vGroup = (ViewGroup) v;
            for (int i = 0; i < vGroup.getChildCount(); i++) {
                View nextChild = vGroup.getChildAt(i);
                getContentDescription(nextChild, description);
            }
        } else if (v instanceof TextView) {
            TextView vText = (TextView) v;
            description.append(vText.getText());
            description.append(","); // Allow Talkback to pause between sections.
        }
     }

     private boolean isExtStorageEncrypted() {
         String state = SystemProperties.get("vold.decrypt");
         return !"".equals(state);
     }

     private void loadAccountList(final UserManager um) {
         View accountsLabel = mContentView.findViewById(R.id.accounts_label);
         LinearLayout contents = (LinearLayout)mContentView.findViewById(R.id.accounts);
         contents.removeAllViews();

         Context context = getActivity();
         final List<UserInfo> profiles = um.getProfiles(UserHandle.myUserId());
         final int profilesSize = profiles.size();

         AccountManager mgr = AccountManager.get(context);

         LayoutInflater inflater = (LayoutInflater)context.getSystemService(
                 Context.LAYOUT_INFLATER_SERVICE);

         int accountsCount = 0;
         for (int profileIndex = 0; profileIndex < profilesSize; profileIndex++) {
             final UserInfo userInfo = profiles.get(profileIndex);
             final int profileId = userInfo.id;
             final UserHandle userHandle = new UserHandle(profileId);
             Account[] accounts = mgr.getAccountsAsUser(profileId);
             final int N = accounts.length;
             if (N == 0) {
                 continue;
             }
             accountsCount += N;

             AuthenticatorDescription[] descs = AccountManager.get(context)
                     .getAuthenticatorTypesAsUser(profileId);
             final int M = descs.length;

             if (profilesSize > 1) {
                 View titleView = Utils.inflateCategoryHeader(inflater, contents);
                 final TextView titleText = (TextView) titleView.findViewById(android.R.id.title);
                 titleText.setText(userInfo.isManagedProfile() ? R.string.category_work
                         : R.string.category_personal);
                 contents.addView(titleView);
             }

             for (int i = 0; i < N; i++) {
                 Account account = accounts[i];
                 AuthenticatorDescription desc = null;
                 for (int j = 0; j < M; j++) {
                     if (account.type.equals(descs[j].type)) {
                         desc = descs[j];
                         break;
                     }
                 }
                 if (desc == null) {
                     Log.w(TAG, "No descriptor for account name=" + account.name
                             + " type=" + account.type);
                     continue;
                 }
                 Drawable icon = null;
                 try {
                     if (desc.iconId != 0) {
                         Context authContext = context.createPackageContextAsUser(desc.packageName,
                                 0, userHandle);
                         icon = context.getPackageManager().getUserBadgedIcon(
                                 authContext.getDrawable(desc.iconId), userHandle);
                     }
                 } catch (PackageManager.NameNotFoundException e) {
                     Log.w(TAG, "Bad package name for account type " + desc.type);
                 } catch (Resources.NotFoundException e) {
                     Log.w(TAG, "Invalid icon id for account type " + desc.type, e);
                 }
                 if (icon == null) {
                     icon = context.getPackageManager().getDefaultActivityIcon();
                 }

                 View child = inflater.inflate(R.layout.master_clear_account, contents, false);
                 ((ImageView) child.findViewById(android.R.id.icon)).setImageDrawable(icon);
                 ((TextView) child.findViewById(android.R.id.title)).setText(account.name);
                 contents.addView(child);
             }
         }

         if (accountsCount > 0) {
             accountsLabel.setVisibility(View.VISIBLE);
             contents.setVisibility(View.VISIBLE);
         }
         // Checking for all other users and their profiles if any.
         View otherUsers = mContentView.findViewById(R.id.other_users_present);
         final boolean hasOtherUsers = (um.getUserCount() - profilesSize) > 0;
         otherUsers.setVisibility(hasOtherUsers ? View.VISIBLE : View.GONE);
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         final Context context = getContext();
         final EnforcedAdmin admin = RestrictedLockUtils.checkIfRestrictionEnforced(context,
                 UserManager.DISALLOW_FACTORY_RESET, UserHandle.myUserId());
         final UserManager um = UserManager.get(context);
         final boolean disallow = !um.isAdminUser() || RestrictedLockUtils.hasBaseUserRestriction(
                 context, UserManager.DISALLOW_FACTORY_RESET, UserHandle.myUserId());
         if (disallow && !Utils.isCarrierDemoUser(context)) {
             return inflater.inflate(R.layout.master_clear_disallowed_screen, null);
         } else if (admin != null) {
             View view = inflater.inflate(R.layout.admin_support_details_empty_view, null);
             ShowAdminSupportDetailsDialog.setAdminSupportDetails(getActivity(), view, admin, false);
             view.setVisibility(View.VISIBLE);
             return view;
         }

         mContentView = inflater.inflate(R.layout.master_clear, null);

         establishInitialState();
         return mContentView;
     }

     @Override
     public int getMetricsCategory() {
         return MetricsEvent.MASTER_CLEAR;
     }
 }
	/*
	* Copyright (C) 2008 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.settings;

	import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;

	import android.accounts.Account;
	import android.accounts.AccountManager;
	import android.accounts.AuthenticatorDescription;
	import android.app.Activity;
	import android.app.FragmentManager;
	import android.content.ContentResolver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.PackageManager;
	import android.content.pm.UserInfo;
	import android.content.res.Resources;
	import android.graphics.drawable.Drawable;
	import android.os.Bundle;
	import android.os.Environment;
	import android.os.SystemProperties;
	import android.os.UserHandle;
	import android.os.UserManager;
	import android.provider.Settings;
	import android.support.annotation.VisibleForTesting;
	import android.telephony.euicc.EuiccManager;
	import android.util.Log;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.View.OnScrollChangeListener;
	import android.view.ViewGroup;
	import android.view.ViewTreeObserver.OnGlobalLayoutListener;
	import android.widget.Button;
	import android.widget.CheckBox;
	import android.widget.ImageView;
	import android.widget.LinearLayout;
	import android.widget.ScrollView;
	import android.widget.TextView;

	import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
	import com.android.settings.password.ChooseLockSettingsHelper;
	import com.android.settings.password.ConfirmLockPattern;
	import com.android.settings.widget.CarrierDemoPasswordDialogFragment;
	import com.android.settingslib.RestrictedLockUtils;

	import java.util.List;

	/**
	* Confirm and execute a reset of the device to a clean "just out of the box"
	* state. Multiple confirmations are required: first, a general "are you sure
	* you want to do this?" prompt, followed by a keyguard pattern trace if the user
	* has defined one, followed by a final strongly-worded "THIS WILL ERASE EVERYTHING
	* ON THE PHONE" prompt. If at any time the phone is allowed to go to sleep, is
	* locked, et cetera, then the confirmation sequence is abandoned.
	*
	* This is the initial screen.
	*/
	public class MasterClear extends OptionsMenuFragment
	implements CarrierDemoPasswordDialogFragment.Callback {
	private static final String TAG = "MasterClear";

	private static final int KEYGUARD_REQUEST = 55;

	static final String ERASE_EXTERNAL_EXTRA = "erase_sd";
	static final String ERASE_ESIMS_EXTRA = "erase_esim";

	private View mContentView;
	private Button mInitiateButton;
	private View mExternalStorageContainer;
	@VisibleForTesting CheckBox mExternalStorage;
	private View mEsimStorageContainer;
	@VisibleForTesting CheckBox mEsimStorage;
	private ScrollView mScrollView;

	private final OnGlobalLayoutListener mOnGlobalLayoutListener = new OnGlobalLayoutListener() {
	@Override
	public void onGlobalLayout() {
	mScrollView.getViewTreeObserver().removeOnGlobalLayoutListener(mOnGlobalLayoutListener);
	mInitiateButton.setEnabled(hasReachedBottom(mScrollView));
	}
	};

	/**
	* Keyguard validation is run using the standard {@link ConfirmLockPattern}
	* component as a subactivity
	* @param request the request code to be returned once confirmation finishes
	* @return true if confirmation launched
	*/
	private boolean runKeyguardConfirmation(int request) {
	Resources res = getActivity().getResources();
	return new ChooseLockSettingsHelper(getActivity(), this).launchConfirmationActivity(
	request, res.getText(R.string.master_clear_title));
	}

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data) {
	super.onActivityResult(requestCode, resultCode, data);

	if (requestCode != KEYGUARD_REQUEST) {
	return;
	}

	// If the user entered a valid keyguard trace, present the final
	// confirmation prompt; otherwise, go back to the initial state.
	if (resultCode == Activity.RESULT_OK) {
	showFinalConfirmation();
	} else {
	establishInitialState();
	}
	}

	@VisibleForTesting
	void showFinalConfirmation() {
	Bundle args = new Bundle();
	args.putBoolean(ERASE_EXTERNAL_EXTRA, mExternalStorage.isChecked());
	args.putBoolean(ERASE_ESIMS_EXTRA, mEsimStorage.isChecked());
	((SettingsActivity) getActivity()).startPreferencePanel(
	this, MasterClearConfirm.class.getName(),
	args, R.string.master_clear_confirm_title, null, null, 0);
	}

	/**
	* If the user clicks to begin the reset sequence, we next require a
	* keyguard confirmation if the user has currently enabled one. If there
	* is no keyguard available, we simply go to the final confirmation prompt.
	*/
	private final Button.OnClickListener mInitiateListener = new Button.OnClickListener() {

	public void onClick(View v) {
	if ( Utils.isCarrierDemoUser(v.getContext())) {
	// Require the carrier password before displaying the final confirmation.
	final FragmentManager fm = getChildFragmentManager();
	if (fm != null && !fm.isDestroyed()) {
	new CarrierDemoPasswordDialogFragment().show(fm, null /* tag */);
	}
	} else if (!runKeyguardConfirmation(KEYGUARD_REQUEST)) {
	showFinalConfirmation();
	}
	}
	};

	@Override
	public void onPasswordVerified() {
	showFinalConfirmation();
	}

	/**
	* In its initial state, the activity presents a button for the user to
	* click in order to initiate a confirmation sequence. This method is
	* called from various other points in the code to reset the activity to
	* this base state.
	*
	* <p>Reinflating views from resources is expensive and prevents us from
	* caching widget pointers, so we use a single-inflate pattern: we lazy-
	* inflate each view, caching all of the widget pointers we'll need at the
	* time, then simply reuse the inflated views directly whenever we need
	* to change contents.
	*/
	private void establishInitialState() {
	mInitiateButton = (Button) mContentView.findViewById(R.id.initiate_master_clear);
	mInitiateButton.setOnClickListener(mInitiateListener);
	mExternalStorageContainer = mContentView.findViewById(R.id.erase_external_container);
	mExternalStorage = (CheckBox) mContentView.findViewById(R.id.erase_external);
	mEsimStorageContainer = mContentView.findViewById(R.id.erase_esim_container);
	mEsimStorage = (CheckBox) mContentView.findViewById(R.id.erase_esim);
	mScrollView = (ScrollView) mContentView.findViewById(R.id.master_clear_scrollview);

	/*
	* If the external storage is emulated, it will be erased with a factory
	* reset at any rate. There is no need to have a separate option until
	* we have a factory reset that only erases some directories and not
	* others. Likewise, if it's non-removable storage, it could potentially have been
	* encrypted, and will also need to be wiped.
	*/
	boolean isExtStorageEmulated = Environment.isExternalStorageEmulated();
	if (isExtStorageEmulated
	\|\| (!Environment.isExternalStorageRemovable() && isExtStorageEncrypted())) {
	mExternalStorageContainer.setVisibility(View.GONE);

	final View externalOption = mContentView.findViewById(R.id.erase_external_option_text);
	externalOption.setVisibility(View.GONE);

	final View externalAlsoErased = mContentView.findViewById(R.id.also_erases_external);
	externalAlsoErased.setVisibility(View.VISIBLE);

	// If it's not emulated, it is on a separate partition but it means we're doing
	// a force wipe due to encryption.
	mExternalStorage.setChecked(!isExtStorageEmulated);
	} else {
	mExternalStorageContainer.setOnClickListener(new View.OnClickListener() {

	@Override
	public void onClick(View v) {
	mExternalStorage.toggle();
	}
	});
	}

	if (showWipeEuicc()) {
	mEsimStorageContainer.setOnClickListener(new View.OnClickListener() {

	@Override
	public void onClick(View v) {
	mEsimStorage.toggle();
	}
	});
	} else {
	mEsimStorageContainer.setVisibility(View.GONE);
	}

	final UserManager um = (UserManager) getActivity().getSystemService(Context.USER_SERVICE);
	loadAccountList(um);
	StringBuffer contentDescription = new StringBuffer();
	View masterClearContainer = mContentView.findViewById(R.id.master_clear_container);
	getContentDescription(masterClearContainer, contentDescription);
	masterClearContainer.setContentDescription(contentDescription);

	// Set the status of initiateButton based on scrollview
	mScrollView.setOnScrollChangeListener(new OnScrollChangeListener() {
	@Override
	public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX,
	int oldScrollY) {
	if (v instanceof ScrollView && hasReachedBottom((ScrollView) v)) {
	mInitiateButton.setEnabled(true);
	}
	}
	});

	// Set the initial state of the initiateButton
	mScrollView.getViewTreeObserver().addOnGlobalLayoutListener(mOnGlobalLayoutListener);
	}

	/**
	* Whether to show the checkbox to wipe the eUICC.
	*
	* <p>We show the checkbox on any device which supports eUICC as long as either the eUICC was
	* ever provisioned (that is, at least one profile was ever downloaded onto it), or if the user
	* has enabled development mode.
	*/
	@VisibleForTesting
	boolean showWipeEuicc() {
	Context context = getContext();
	if (!isEuiccEnabled(context)) {
	return false;
	}
	ContentResolver cr = context.getContentResolver();
	return Settings.Global.getInt(cr, Settings.Global.EUICC_PROVISIONED, 0) != 0
	\|\| Settings.Global.getInt(cr, Settings.Global.DEVELOPMENT_SETTINGS_ENABLED, 0) != 0;
	}

	@VisibleForTesting
	protected boolean isEuiccEnabled(Context context) {
	EuiccManager euiccManager = (EuiccManager) context.getSystemService(Context.EUICC_SERVICE);
	return euiccManager.isEnabled();
	}

	@VisibleForTesting
	boolean hasReachedBottom(final ScrollView scrollView) {
	if (scrollView.getChildCount() < 1) {
	return true;
	}

	final View view = scrollView.getChildAt(0);
	final int diff = view.getBottom() - (scrollView.getHeight() + scrollView.getScrollY());

	return diff <= 0;
	}

	private void getContentDescription(View v, StringBuffer description) {
	if (v.getVisibility() != View.VISIBLE) {
	return;
	}
	if (v instanceof ViewGroup) {
	ViewGroup vGroup = (ViewGroup) v;
	for (int i = 0; i < vGroup.getChildCount(); i++) {
	View nextChild = vGroup.getChildAt(i);
	getContentDescription(nextChild, description);
	}
	} else if (v instanceof TextView) {
	TextView vText = (TextView) v;
	description.append(vText.getText());
	description.append(","); // Allow Talkback to pause between sections.
	}
	}

	private boolean isExtStorageEncrypted() {
	String state = SystemProperties.get("vold.decrypt");
	return !"".equals(state);
	}

	private void loadAccountList(final UserManager um) {
	View accountsLabel = mContentView.findViewById(R.id.accounts_label);
	LinearLayout contents = (LinearLayout)mContentView.findViewById(R.id.accounts);
	contents.removeAllViews();

	Context context = getActivity();
	final List<UserInfo> profiles = um.getProfiles(UserHandle.myUserId());
	final int profilesSize = profiles.size();

	AccountManager mgr = AccountManager.get(context);

	LayoutInflater inflater = (LayoutInflater)context.getSystemService(
	Context.LAYOUT_INFLATER_SERVICE);

	int accountsCount = 0;
	for (int profileIndex = 0; profileIndex < profilesSize; profileIndex++) {
	final UserInfo userInfo = profiles.get(profileIndex);
	final int profileId = userInfo.id;
	final UserHandle userHandle = new UserHandle(profileId);
	Account[] accounts = mgr.getAccountsAsUser(profileId);
	final int N = accounts.length;
	if (N == 0) {
	continue;
	}
	accountsCount += N;

	AuthenticatorDescription[] descs = AccountManager.get(context)
	.getAuthenticatorTypesAsUser(profileId);
	final int M = descs.length;

	if (profilesSize > 1) {
	View titleView = Utils.inflateCategoryHeader(inflater, contents);
	final TextView titleText = (TextView) titleView.findViewById(android.R.id.title);
	titleText.setText(userInfo.isManagedProfile() ? R.string.category_work
	: R.string.category_personal);
	contents.addView(titleView);
	}

	for (int i = 0; i < N; i++) {
	Account account = accounts[i];
	AuthenticatorDescription desc = null;
	for (int j = 0; j < M; j++) {
	if (account.type.equals(descs[j].type)) {
	desc = descs[j];
	break;
	}
	}
	if (desc == null) {
	Log.w(TAG, "No descriptor for account name=" + account.name
	+ " type=" + account.type);
	continue;
	}
	Drawable icon = null;
	try {
	if (desc.iconId != 0) {
	Context authContext = context.createPackageContextAsUser(desc.packageName,
	0, userHandle);
	icon = context.getPackageManager().getUserBadgedIcon(
	authContext.getDrawable(desc.iconId), userHandle);
	}
	} catch (PackageManager.NameNotFoundException e) {
	Log.w(TAG, "Bad package name for account type " + desc.type);
	} catch (Resources.NotFoundException e) {
	Log.w(TAG, "Invalid icon id for account type " + desc.type, e);
	}
	if (icon == null) {
	icon = context.getPackageManager().getDefaultActivityIcon();
	}

	View child = inflater.inflate(R.layout.master_clear_account, contents, false);
	((ImageView) child.findViewById(android.R.id.icon)).setImageDrawable(icon);
	((TextView) child.findViewById(android.R.id.title)).setText(account.name);
	contents.addView(child);
	}
	}

	if (accountsCount > 0) {
	accountsLabel.setVisibility(View.VISIBLE);
	contents.setVisibility(View.VISIBLE);
	}
	// Checking for all other users and their profiles if any.
	View otherUsers = mContentView.findViewById(R.id.other_users_present);
	final boolean hasOtherUsers = (um.getUserCount() - profilesSize) > 0;
	otherUsers.setVisibility(hasOtherUsers ? View.VISIBLE : View.GONE);
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	final Context context = getContext();
	final EnforcedAdmin admin = RestrictedLockUtils.checkIfRestrictionEnforced(context,
	UserManager.DISALLOW_FACTORY_RESET, UserHandle.myUserId());
	final UserManager um = UserManager.get(context);
	final boolean disallow = !um.isAdminUser() \|\| RestrictedLockUtils.hasBaseUserRestriction(
	context, UserManager.DISALLOW_FACTORY_RESET, UserHandle.myUserId());
	if (disallow && !Utils.isCarrierDemoUser(context)) {
	return inflater.inflate(R.layout.master_clear_disallowed_screen, null);
	} else if (admin != null) {
	View view = inflater.inflate(R.layout.admin_support_details_empty_view, null);
	ShowAdminSupportDetailsDialog.setAdminSupportDetails(getActivity(), view, admin, false);
	view.setVisibility(View.VISIBLE);
	return view;
	}

	mContentView = inflater.inflate(R.layout.master_clear, null);

	establishInitialState();
	return mContentView;
	}

	@Override
	public int getMetricsCategory() {
	return MetricsEvent.MASTER_CLEAR;
	}
	}