com/android/keyguard/KeyguardSecurityContainer.java - platform/prebuilts/fullsdk/sources/android-28 - Git at Google

 /*
  * Copyright (C) 2014 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.keyguard;

 import android.R.style;
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.admin.DevicePolicyManager;
 import android.content.Context;
 import android.os.UserHandle;
 import android.support.annotation.VisibleForTesting;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.Slog;
 import android.view.ContextThemeWrapper;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.WindowManager;
 import android.widget.FrameLayout;

 import com.android.internal.widget.LockPatternUtils;
 import com.android.keyguard.KeyguardSecurityModel.SecurityMode;

 public class KeyguardSecurityContainer extends FrameLayout implements KeyguardSecurityView {
     private static final boolean DEBUG = KeyguardConstants.DEBUG;
     private static final String TAG = "KeyguardSecurityView";

     private static final int USER_TYPE_PRIMARY = 1;
     private static final int USER_TYPE_WORK_PROFILE = 2;
     private static final int USER_TYPE_SECONDARY_USER = 3;

     private KeyguardSecurityModel mSecurityModel;
     private LockPatternUtils mLockPatternUtils;

     private KeyguardSecurityViewFlipper mSecurityViewFlipper;
     private boolean mIsVerifyUnlockOnly;
     private SecurityMode mCurrentSecuritySelection = SecurityMode.Invalid;
     private SecurityCallback mSecurityCallback;
     private AlertDialog mAlertDialog;

     private final KeyguardUpdateMonitor mUpdateMonitor;

     // Used to notify the container when something interesting happens.
     public interface SecurityCallback {
         public boolean dismiss(boolean authenticated, int targetUserId);
         public void userActivity();
         public void onSecurityModeChanged(SecurityMode securityMode, boolean needsInput);

         /**
          * @param strongAuth wheher the user has authenticated with strong authentication like
          *                   pattern, password or PIN but not by trust agents or fingerprint
          * @param targetUserId a user that needs to be the foreground user at the finish completion.
          */
         public void finish(boolean strongAuth, int targetUserId);
         public void reset();
     }

     public KeyguardSecurityContainer(Context context, AttributeSet attrs) {
         this(context, attrs, 0);
     }

     public KeyguardSecurityContainer(Context context) {
         this(context, null, 0);
     }

     public KeyguardSecurityContainer(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         mSecurityModel = new KeyguardSecurityModel(context);
         mLockPatternUtils = new LockPatternUtils(context);
         mUpdateMonitor = KeyguardUpdateMonitor.getInstance(mContext);
     }

     public void setSecurityCallback(SecurityCallback callback) {
         mSecurityCallback = callback;
     }

     @Override
     public void onResume(int reason) {
         if (mCurrentSecuritySelection != SecurityMode.None) {
             getSecurityView(mCurrentSecuritySelection).onResume(reason);
         }
     }

     @Override
     public void onPause() {
         if (mAlertDialog != null) {
             mAlertDialog.dismiss();
             mAlertDialog = null;
         }
         if (mCurrentSecuritySelection != SecurityMode.None) {
             getSecurityView(mCurrentSecuritySelection).onPause();
         }
     }

     public void startAppearAnimation() {
         if (mCurrentSecuritySelection != SecurityMode.None) {
             getSecurityView(mCurrentSecuritySelection).startAppearAnimation();
         }
     }

     public boolean startDisappearAnimation(Runnable onFinishRunnable) {
         if (mCurrentSecuritySelection != SecurityMode.None) {
             return getSecurityView(mCurrentSecuritySelection).startDisappearAnimation(
                     onFinishRunnable);
         }
         return false;
     }

     public void announceCurrentSecurityMethod() {
         View v = (View) getSecurityView(mCurrentSecuritySelection);
         if (v != null) {
             v.announceForAccessibility(v.getContentDescription());
         }
     }

     public CharSequence getCurrentSecurityModeContentDescription() {
         View v = (View) getSecurityView(mCurrentSecuritySelection);
         if (v != null) {
             return v.getContentDescription();
         }
         return "";
     }

     private KeyguardSecurityView getSecurityView(SecurityMode securityMode) {
         final int securityViewIdForMode = getSecurityViewIdForMode(securityMode);
         KeyguardSecurityView view = null;
         final int children = mSecurityViewFlipper.getChildCount();
         for (int child = 0; child < children; child++) {
             if (mSecurityViewFlipper.getChildAt(child).getId() == securityViewIdForMode) {
                 view = ((KeyguardSecurityView)mSecurityViewFlipper.getChildAt(child));
                 break;
             }
         }
         int layoutId = getLayoutIdFor(securityMode);
         if (view == null && layoutId != 0) {
             final LayoutInflater inflater = LayoutInflater.from(mContext);
             if (DEBUG) Log.v(TAG, "inflating id = " + layoutId);
             View v = inflater.inflate(layoutId, mSecurityViewFlipper, false);
             mSecurityViewFlipper.addView(v);
             updateSecurityView(v);
             view = (KeyguardSecurityView)v;
         }

         return view;
     }

     private void updateSecurityView(View view) {
         if (view instanceof KeyguardSecurityView) {
             KeyguardSecurityView ksv = (KeyguardSecurityView) view;
             ksv.setKeyguardCallback(mCallback);
             ksv.setLockPatternUtils(mLockPatternUtils);
         } else {
             Log.w(TAG, "View " + view + " is not a KeyguardSecurityView");
         }
     }

     protected void onFinishInflate() {
         mSecurityViewFlipper = findViewById(R.id.view_flipper);
         mSecurityViewFlipper.setLockPatternUtils(mLockPatternUtils);
     }

     public void setLockPatternUtils(LockPatternUtils utils) {
         mLockPatternUtils = utils;
         mSecurityModel.setLockPatternUtils(utils);
         mSecurityViewFlipper.setLockPatternUtils(mLockPatternUtils);
     }

     private void showDialog(String title, String message) {
         if (mAlertDialog != null) {
             mAlertDialog.dismiss();
         }

         mAlertDialog = new AlertDialog.Builder(mContext)
             .setTitle(title)
             .setMessage(message)
             .setCancelable(false)
             .setNeutralButton(R.string.ok, null)
             .create();
         if (!(mContext instanceof Activity)) {
             mAlertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
         }
         mAlertDialog.show();
     }

     private void showTimeoutDialog(int userId, int timeoutMs) {
         int timeoutInSeconds = (int) timeoutMs / 1000;
         int messageId = 0;

         switch (mSecurityModel.getSecurityMode(userId)) {
             case Pattern:
                 messageId = R.string.kg_too_many_failed_pattern_attempts_dialog_message;
                 break;
             case PIN:
                 messageId = R.string.kg_too_many_failed_pin_attempts_dialog_message;
                 break;
             case Password:
                 messageId = R.string.kg_too_many_failed_password_attempts_dialog_message;
                 break;
             // These don't have timeout dialogs.
             case Invalid:
             case None:
             case SimPin:
             case SimPuk:
                 break;
         }

         if (messageId != 0) {
             final String message = mContext.getString(messageId,
                     KeyguardUpdateMonitor.getInstance(mContext).getFailedUnlockAttempts(userId),
                     timeoutInSeconds);
             showDialog(null, message);
         }
     }

     private void showAlmostAtWipeDialog(int attempts, int remaining, int userType) {
         String message = null;
         switch (userType) {
             case USER_TYPE_PRIMARY:
                 message = mContext.getString(R.string.kg_failed_attempts_almost_at_wipe,
                         attempts, remaining);
                 break;
             case USER_TYPE_SECONDARY_USER:
                 message = mContext.getString(R.string.kg_failed_attempts_almost_at_erase_user,
                         attempts, remaining);
                 break;
             case USER_TYPE_WORK_PROFILE:
                 message = mContext.getString(R.string.kg_failed_attempts_almost_at_erase_profile,
                         attempts, remaining);
                 break;
         }
         showDialog(null, message);
     }

     private void showWipeDialog(int attempts, int userType) {
         String message = null;
         switch (userType) {
             case USER_TYPE_PRIMARY:
                 message = mContext.getString(R.string.kg_failed_attempts_now_wiping,
                         attempts);
                 break;
             case USER_TYPE_SECONDARY_USER:
                 message = mContext.getString(R.string.kg_failed_attempts_now_erasing_user,
                         attempts);
                 break;
             case USER_TYPE_WORK_PROFILE:
                 message = mContext.getString(R.string.kg_failed_attempts_now_erasing_profile,
                         attempts);
                 break;
         }
         showDialog(null, message);
     }

     private void reportFailedUnlockAttempt(int userId, int timeoutMs) {
         final KeyguardUpdateMonitor monitor = KeyguardUpdateMonitor.getInstance(mContext);
         final int failedAttempts = monitor.getFailedUnlockAttempts(userId) + 1; // +1 for this time

         if (DEBUG) Log.d(TAG, "reportFailedPatternAttempt: #" + failedAttempts);

         final DevicePolicyManager dpm = mLockPatternUtils.getDevicePolicyManager();
         final int failedAttemptsBeforeWipe =
                 dpm.getMaximumFailedPasswordsForWipe(null, userId);

         final int remainingBeforeWipe = failedAttemptsBeforeWipe > 0 ?
                 (failedAttemptsBeforeWipe - failedAttempts)
                 : Integer.MAX_VALUE; // because DPM returns 0 if no restriction
         if (remainingBeforeWipe < LockPatternUtils.FAILED_ATTEMPTS_BEFORE_WIPE_GRACE) {
             // The user has installed a DevicePolicyManager that requests a user/profile to be wiped
             // N attempts. Once we get below the grace period, we post this dialog every time as a
             // clear warning until the deletion fires.
             // Check which profile has the strictest policy for failed password attempts
             final int expiringUser = dpm.getProfileWithMinimumFailedPasswordsForWipe(userId);
             int userType = USER_TYPE_PRIMARY;
             if (expiringUser == userId) {
                 // TODO: http://b/23522538
                 if (expiringUser != UserHandle.USER_SYSTEM) {
                     userType = USER_TYPE_SECONDARY_USER;
                 }
             } else if (expiringUser != UserHandle.USER_NULL) {
                 userType = USER_TYPE_WORK_PROFILE;
             } // If USER_NULL, which shouldn't happen, leave it as USER_TYPE_PRIMARY
             if (remainingBeforeWipe > 0) {
                 showAlmostAtWipeDialog(failedAttempts, remainingBeforeWipe, userType);
             } else {
                 // Too many attempts. The device will be wiped shortly.
                 Slog.i(TAG, "Too many unlock attempts; user " + expiringUser + " will be wiped!");
                 showWipeDialog(failedAttempts, userType);
             }
         }
         monitor.reportFailedStrongAuthUnlockAttempt(userId);
         mLockPatternUtils.reportFailedPasswordAttempt(userId);
         if (timeoutMs > 0) {
             mLockPatternUtils.reportPasswordLockout(timeoutMs, userId);
             showTimeoutDialog(userId, timeoutMs);
         }
     }

     /**
      * Shows the primary security screen for the user. This will be either the multi-selector
      * or the user's security method.
      * @param turningOff true if the device is being turned off
      */
     void showPrimarySecurityScreen(boolean turningOff) {
         SecurityMode securityMode = mSecurityModel.getSecurityMode(
                 KeyguardUpdateMonitor.getCurrentUser());
         if (DEBUG) Log.v(TAG, "showPrimarySecurityScreen(turningOff=" + turningOff + ")");
         showSecurityScreen(securityMode);
     }

     /**
      * Shows the next security screen if there is one.
      * @param authenticated true if the user entered the correct authentication
      * @param targetUserId a user that needs to be the foreground user at the finish (if called)
      *     completion.
      * @return true if keyguard is done
      */
     boolean showNextSecurityScreenOrFinish(boolean authenticated, int targetUserId) {
         if (DEBUG) Log.d(TAG, "showNextSecurityScreenOrFinish(" + authenticated + ")");
         boolean finish = false;
         boolean strongAuth = false;
         if (mUpdateMonitor.getUserCanSkipBouncer(targetUserId)) {
             finish = true;
         } else if (SecurityMode.None == mCurrentSecuritySelection) {
             SecurityMode securityMode = mSecurityModel.getSecurityMode(targetUserId);
             if (SecurityMode.None == securityMode) {
                 finish = true; // no security required
             } else {
                 showSecurityScreen(securityMode); // switch to the alternate security view
             }
         } else if (authenticated) {
             switch (mCurrentSecuritySelection) {
                 case Pattern:
                 case Password:
                 case PIN:
                     strongAuth = true;
                     finish = true;
                     break;

                 case SimPin:
                 case SimPuk:
                     // Shortcut for SIM PIN/PUK to go to directly to user's security screen or home
                     SecurityMode securityMode = mSecurityModel.getSecurityMode(targetUserId);
                     if (securityMode != SecurityMode.None
                             || !mLockPatternUtils.isLockScreenDisabled(
                             KeyguardUpdateMonitor.getCurrentUser())) {
                         showSecurityScreen(securityMode);
                     } else {
                         finish = true;
                     }
                     break;

                 default:
                     Log.v(TAG, "Bad security screen " + mCurrentSecuritySelection + ", fail safe");
                     showPrimarySecurityScreen(false);
                     break;
             }
         }
         if (finish) {
             mSecurityCallback.finish(strongAuth, targetUserId);
         }
         return finish;
     }

     /**
      * Switches to the given security view unless it's already being shown, in which case
      * this is a no-op.
      *
      * @param securityMode
      */
     private void showSecurityScreen(SecurityMode securityMode) {
         if (DEBUG) Log.d(TAG, "showSecurityScreen(" + securityMode + ")");

         if (securityMode == mCurrentSecuritySelection) return;

         KeyguardSecurityView oldView = getSecurityView(mCurrentSecuritySelection);
         KeyguardSecurityView newView = getSecurityView(securityMode);

         // Emulate Activity life cycle
         if (oldView != null) {
             oldView.onPause();
             oldView.setKeyguardCallback(mNullCallback); // ignore requests from old view
         }
         if (securityMode != SecurityMode.None) {
             newView.onResume(KeyguardSecurityView.VIEW_REVEALED);
             newView.setKeyguardCallback(mCallback);
         }

         // Find and show this child.
         final int childCount = mSecurityViewFlipper.getChildCount();

         final int securityViewIdForMode = getSecurityViewIdForMode(securityMode);
         for (int i = 0; i < childCount; i++) {
             if (mSecurityViewFlipper.getChildAt(i).getId() == securityViewIdForMode) {
                 mSecurityViewFlipper.setDisplayedChild(i);
                 break;
             }
         }

         mCurrentSecuritySelection = securityMode;
         mSecurityCallback.onSecurityModeChanged(securityMode,
                 securityMode != SecurityMode.None && newView.needsInput());
     }

     private KeyguardSecurityViewFlipper getFlipper() {
         for (int i = 0; i < getChildCount(); i++) {
             View child = getChildAt(i);
             if (child instanceof KeyguardSecurityViewFlipper) {
                 return (KeyguardSecurityViewFlipper) child;
             }
         }
         return null;
     }

     private KeyguardSecurityCallback mCallback = new KeyguardSecurityCallback() {
         public void userActivity() {
             if (mSecurityCallback != null) {
                 mSecurityCallback.userActivity();
             }
         }

         public void dismiss(boolean authenticated, int targetId) {
             mSecurityCallback.dismiss(authenticated, targetId);
         }

         public boolean isVerifyUnlockOnly() {
             return mIsVerifyUnlockOnly;
         }

         public void reportUnlockAttempt(int userId, boolean success, int timeoutMs) {
             KeyguardUpdateMonitor monitor = KeyguardUpdateMonitor.getInstance(mContext);
             if (success) {
                 monitor.clearFailedUnlockAttempts();
                 mLockPatternUtils.reportSuccessfulPasswordAttempt(userId);
             } else {
                 KeyguardSecurityContainer.this.reportFailedUnlockAttempt(userId, timeoutMs);
             }
         }

         public void reset() {
             mSecurityCallback.reset();
         }
     };

     // The following is used to ignore callbacks from SecurityViews that are no longer current
     // (e.g. face unlock). This avoids unwanted asynchronous events from messing with the
     // state for the current security method.
     private KeyguardSecurityCallback mNullCallback = new KeyguardSecurityCallback() {
         @Override
         public void userActivity() { }
         @Override
         public void reportUnlockAttempt(int userId, boolean success, int timeoutMs) { }
         @Override
         public boolean isVerifyUnlockOnly() { return false; }
         @Override
         public void dismiss(boolean securityVerified, int targetUserId) { }
         @Override
         public void reset() {}
     };

     private int getSecurityViewIdForMode(SecurityMode securityMode) {
         switch (securityMode) {
             case Pattern: return R.id.keyguard_pattern_view;
             case PIN: return R.id.keyguard_pin_view;
             case Password: return R.id.keyguard_password_view;
             case SimPin: return R.id.keyguard_sim_pin_view;
             case SimPuk: return R.id.keyguard_sim_puk_view;
         }
         return 0;
     }

     @VisibleForTesting
     public int getLayoutIdFor(SecurityMode securityMode) {
         switch (securityMode) {
             case Pattern: return R.layout.keyguard_pattern_view;
             case PIN: return R.layout.keyguard_pin_view;
             case Password: return R.layout.keyguard_password_view;
             case SimPin: return R.layout.keyguard_sim_pin_view;
             case SimPuk: return R.layout.keyguard_sim_puk_view;
             default:
                 return 0;
         }
     }

     public SecurityMode getSecurityMode() {
         return mSecurityModel.getSecurityMode(KeyguardUpdateMonitor.getCurrentUser());
     }

     public SecurityMode getCurrentSecurityMode() {
         return mCurrentSecuritySelection;
     }

     public void verifyUnlock() {
         mIsVerifyUnlockOnly = true;
         showSecurityScreen(getSecurityMode());
     }

     public SecurityMode getCurrentSecuritySelection() {
         return mCurrentSecuritySelection;
     }

     public void dismiss(boolean authenticated, int targetUserId) {
         mCallback.dismiss(authenticated, targetUserId);
     }

     public boolean needsInput() {
         return mSecurityViewFlipper.needsInput();
     }

     @Override
     public void setKeyguardCallback(KeyguardSecurityCallback callback) {
         mSecurityViewFlipper.setKeyguardCallback(callback);
     }

     @Override
     public void reset() {
         mSecurityViewFlipper.reset();
     }

     @Override
     public KeyguardSecurityCallback getCallback() {
         return mSecurityViewFlipper.getCallback();
     }

     @Override
     public void showPromptReason(int reason) {
         if (mCurrentSecuritySelection != SecurityMode.None) {
             if (reason != PROMPT_REASON_NONE) {
                 Log.i(TAG, "Strong auth required, reason: " + reason);
             }
             getSecurityView(mCurrentSecuritySelection).showPromptReason(reason);
         }
     }


     public void showMessage(String message, int color) {
         if (mCurrentSecuritySelection != SecurityMode.None) {
             getSecurityView(mCurrentSecuritySelection).showMessage(message, color);
         }
     }

     @Override
     public void showUsabilityHint() {
         mSecurityViewFlipper.showUsabilityHint();
     }

 }
	/*
	* Copyright (C) 2014 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.keyguard;

	import android.R.style;
	import android.app.Activity;
	import android.app.AlertDialog;
	import android.app.admin.DevicePolicyManager;
	import android.content.Context;
	import android.os.UserHandle;
	import android.support.annotation.VisibleForTesting;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.util.Slog;
	import android.view.ContextThemeWrapper;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.WindowManager;
	import android.widget.FrameLayout;

	import com.android.internal.widget.LockPatternUtils;
	import com.android.keyguard.KeyguardSecurityModel.SecurityMode;

	public class KeyguardSecurityContainer extends FrameLayout implements KeyguardSecurityView {
	private static final boolean DEBUG = KeyguardConstants.DEBUG;
	private static final String TAG = "KeyguardSecurityView";

	private static final int USER_TYPE_PRIMARY = 1;
	private static final int USER_TYPE_WORK_PROFILE = 2;
	private static final int USER_TYPE_SECONDARY_USER = 3;

	private KeyguardSecurityModel mSecurityModel;
	private LockPatternUtils mLockPatternUtils;

	private KeyguardSecurityViewFlipper mSecurityViewFlipper;
	private boolean mIsVerifyUnlockOnly;
	private SecurityMode mCurrentSecuritySelection = SecurityMode.Invalid;
	private SecurityCallback mSecurityCallback;
	private AlertDialog mAlertDialog;

	private final KeyguardUpdateMonitor mUpdateMonitor;

	// Used to notify the container when something interesting happens.
	public interface SecurityCallback {
	public boolean dismiss(boolean authenticated, int targetUserId);
	public void userActivity();
	public void onSecurityModeChanged(SecurityMode securityMode, boolean needsInput);

	/**
	* @param strongAuth wheher the user has authenticated with strong authentication like
	* pattern, password or PIN but not by trust agents or fingerprint
	* @param targetUserId a user that needs to be the foreground user at the finish completion.
	*/
	public void finish(boolean strongAuth, int targetUserId);
	public void reset();
	}

	public KeyguardSecurityContainer(Context context, AttributeSet attrs) {
	this(context, attrs, 0);
	}

	public KeyguardSecurityContainer(Context context) {
	this(context, null, 0);
	}

	public KeyguardSecurityContainer(Context context, AttributeSet attrs, int defStyle) {
	super(context, attrs, defStyle);
	mSecurityModel = new KeyguardSecurityModel(context);
	mLockPatternUtils = new LockPatternUtils(context);
	mUpdateMonitor = KeyguardUpdateMonitor.getInstance(mContext);
	}

	public void setSecurityCallback(SecurityCallback callback) {
	mSecurityCallback = callback;
	}

	@Override
	public void onResume(int reason) {
	if (mCurrentSecuritySelection != SecurityMode.None) {
	getSecurityView(mCurrentSecuritySelection).onResume(reason);
	}
	}

	@Override
	public void onPause() {
	if (mAlertDialog != null) {
	mAlertDialog.dismiss();
	mAlertDialog = null;
	}
	if (mCurrentSecuritySelection != SecurityMode.None) {
	getSecurityView(mCurrentSecuritySelection).onPause();
	}
	}

	public void startAppearAnimation() {
	if (mCurrentSecuritySelection != SecurityMode.None) {
	getSecurityView(mCurrentSecuritySelection).startAppearAnimation();
	}
	}

	public boolean startDisappearAnimation(Runnable onFinishRunnable) {
	if (mCurrentSecuritySelection != SecurityMode.None) {
	return getSecurityView(mCurrentSecuritySelection).startDisappearAnimation(
	onFinishRunnable);
	}
	return false;
	}

	public void announceCurrentSecurityMethod() {
	View v = (View) getSecurityView(mCurrentSecuritySelection);
	if (v != null) {
	v.announceForAccessibility(v.getContentDescription());
	}
	}

	public CharSequence getCurrentSecurityModeContentDescription() {
	View v = (View) getSecurityView(mCurrentSecuritySelection);
	if (v != null) {
	return v.getContentDescription();
	}
	return "";
	}

	private KeyguardSecurityView getSecurityView(SecurityMode securityMode) {
	final int securityViewIdForMode = getSecurityViewIdForMode(securityMode);
	KeyguardSecurityView view = null;
	final int children = mSecurityViewFlipper.getChildCount();
	for (int child = 0; child < children; child++) {
	if (mSecurityViewFlipper.getChildAt(child).getId() == securityViewIdForMode) {
	view = ((KeyguardSecurityView)mSecurityViewFlipper.getChildAt(child));
	break;
	}
	}
	int layoutId = getLayoutIdFor(securityMode);
	if (view == null && layoutId != 0) {
	final LayoutInflater inflater = LayoutInflater.from(mContext);
	if (DEBUG) Log.v(TAG, "inflating id = " + layoutId);
	View v = inflater.inflate(layoutId, mSecurityViewFlipper, false);
	mSecurityViewFlipper.addView(v);
	updateSecurityView(v);
	view = (KeyguardSecurityView)v;
	}

	return view;
	}

	private void updateSecurityView(View view) {
	if (view instanceof KeyguardSecurityView) {
	KeyguardSecurityView ksv = (KeyguardSecurityView) view;
	ksv.setKeyguardCallback(mCallback);
	ksv.setLockPatternUtils(mLockPatternUtils);
	} else {
	Log.w(TAG, "View " + view + " is not a KeyguardSecurityView");
	}
	}

	protected void onFinishInflate() {
	mSecurityViewFlipper = findViewById(R.id.view_flipper);
	mSecurityViewFlipper.setLockPatternUtils(mLockPatternUtils);
	}

	public void setLockPatternUtils(LockPatternUtils utils) {
	mLockPatternUtils = utils;
	mSecurityModel.setLockPatternUtils(utils);
	mSecurityViewFlipper.setLockPatternUtils(mLockPatternUtils);
	}

	private void showDialog(String title, String message) {
	if (mAlertDialog != null) {
	mAlertDialog.dismiss();
	}

	mAlertDialog = new AlertDialog.Builder(mContext)
	.setTitle(title)
	.setMessage(message)
	.setCancelable(false)
	.setNeutralButton(R.string.ok, null)
	.create();
	if (!(mContext instanceof Activity)) {
	mAlertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
	}
	mAlertDialog.show();
	}

	private void showTimeoutDialog(int userId, int timeoutMs) {
	int timeoutInSeconds = (int) timeoutMs / 1000;
	int messageId = 0;

	switch (mSecurityModel.getSecurityMode(userId)) {
	case Pattern:
	messageId = R.string.kg_too_many_failed_pattern_attempts_dialog_message;
	break;
	case PIN:
	messageId = R.string.kg_too_many_failed_pin_attempts_dialog_message;
	break;
	case Password:
	messageId = R.string.kg_too_many_failed_password_attempts_dialog_message;
	break;
	// These don't have timeout dialogs.
	case Invalid:
	case None:
	case SimPin:
	case SimPuk:
	break;
	}

	if (messageId != 0) {
	final String message = mContext.getString(messageId,
	KeyguardUpdateMonitor.getInstance(mContext).getFailedUnlockAttempts(userId),
	timeoutInSeconds);
	showDialog(null, message);
	}
	}

	private void showAlmostAtWipeDialog(int attempts, int remaining, int userType) {
	String message = null;
	switch (userType) {
	case USER_TYPE_PRIMARY:
	message = mContext.getString(R.string.kg_failed_attempts_almost_at_wipe,
	attempts, remaining);
	break;
	case USER_TYPE_SECONDARY_USER:
	message = mContext.getString(R.string.kg_failed_attempts_almost_at_erase_user,
	attempts, remaining);
	break;
	case USER_TYPE_WORK_PROFILE:
	message = mContext.getString(R.string.kg_failed_attempts_almost_at_erase_profile,
	attempts, remaining);
	break;
	}
	showDialog(null, message);
	}

	private void showWipeDialog(int attempts, int userType) {
	String message = null;
	switch (userType) {
	case USER_TYPE_PRIMARY:
	message = mContext.getString(R.string.kg_failed_attempts_now_wiping,
	attempts);
	break;
	case USER_TYPE_SECONDARY_USER:
	message = mContext.getString(R.string.kg_failed_attempts_now_erasing_user,
	attempts);
	break;
	case USER_TYPE_WORK_PROFILE:
	message = mContext.getString(R.string.kg_failed_attempts_now_erasing_profile,
	attempts);
	break;
	}
	showDialog(null, message);
	}

	private void reportFailedUnlockAttempt(int userId, int timeoutMs) {
	final KeyguardUpdateMonitor monitor = KeyguardUpdateMonitor.getInstance(mContext);
	final int failedAttempts = monitor.getFailedUnlockAttempts(userId) + 1; // +1 for this time

	if (DEBUG) Log.d(TAG, "reportFailedPatternAttempt: #" + failedAttempts);

	final DevicePolicyManager dpm = mLockPatternUtils.getDevicePolicyManager();
	final int failedAttemptsBeforeWipe =
	dpm.getMaximumFailedPasswordsForWipe(null, userId);

	final int remainingBeforeWipe = failedAttemptsBeforeWipe > 0 ?
	(failedAttemptsBeforeWipe - failedAttempts)
	: Integer.MAX_VALUE; // because DPM returns 0 if no restriction
	if (remainingBeforeWipe < LockPatternUtils.FAILED_ATTEMPTS_BEFORE_WIPE_GRACE) {
	// The user has installed a DevicePolicyManager that requests a user/profile to be wiped
	// N attempts. Once we get below the grace period, we post this dialog every time as a
	// clear warning until the deletion fires.
	// Check which profile has the strictest policy for failed password attempts
	final int expiringUser = dpm.getProfileWithMinimumFailedPasswordsForWipe(userId);
	int userType = USER_TYPE_PRIMARY;
	if (expiringUser == userId) {
	// TODO: http://b/23522538
	if (expiringUser != UserHandle.USER_SYSTEM) {
	userType = USER_TYPE_SECONDARY_USER;
	}
	} else if (expiringUser != UserHandle.USER_NULL) {
	userType = USER_TYPE_WORK_PROFILE;
	} // If USER_NULL, which shouldn't happen, leave it as USER_TYPE_PRIMARY
	if (remainingBeforeWipe > 0) {
	showAlmostAtWipeDialog(failedAttempts, remainingBeforeWipe, userType);
	} else {
	// Too many attempts. The device will be wiped shortly.
	Slog.i(TAG, "Too many unlock attempts; user " + expiringUser + " will be wiped!");
	showWipeDialog(failedAttempts, userType);
	}
	}
	monitor.reportFailedStrongAuthUnlockAttempt(userId);
	mLockPatternUtils.reportFailedPasswordAttempt(userId);
	if (timeoutMs > 0) {
	mLockPatternUtils.reportPasswordLockout(timeoutMs, userId);
	showTimeoutDialog(userId, timeoutMs);
	}
	}

	/**
	* Shows the primary security screen for the user. This will be either the multi-selector
	* or the user's security method.
	* @param turningOff true if the device is being turned off
	*/
	void showPrimarySecurityScreen(boolean turningOff) {
	SecurityMode securityMode = mSecurityModel.getSecurityMode(
	KeyguardUpdateMonitor.getCurrentUser());
	if (DEBUG) Log.v(TAG, "showPrimarySecurityScreen(turningOff=" + turningOff + ")");
	showSecurityScreen(securityMode);
	}

	/**
	* Shows the next security screen if there is one.
	* @param authenticated true if the user entered the correct authentication
	* @param targetUserId a user that needs to be the foreground user at the finish (if called)
	* completion.
	* @return true if keyguard is done
	*/
	boolean showNextSecurityScreenOrFinish(boolean authenticated, int targetUserId) {
	if (DEBUG) Log.d(TAG, "showNextSecurityScreenOrFinish(" + authenticated + ")");
	boolean finish = false;
	boolean strongAuth = false;
	if (mUpdateMonitor.getUserCanSkipBouncer(targetUserId)) {
	finish = true;
	} else if (SecurityMode.None == mCurrentSecuritySelection) {
	SecurityMode securityMode = mSecurityModel.getSecurityMode(targetUserId);
	if (SecurityMode.None == securityMode) {
	finish = true; // no security required
	} else {
	showSecurityScreen(securityMode); // switch to the alternate security view
	}
	} else if (authenticated) {
	switch (mCurrentSecuritySelection) {
	case Pattern:
	case Password:
	case PIN:
	strongAuth = true;
	finish = true;
	break;

	case SimPin:
	case SimPuk:
	// Shortcut for SIM PIN/PUK to go to directly to user's security screen or home
	SecurityMode securityMode = mSecurityModel.getSecurityMode(targetUserId);
	if (securityMode != SecurityMode.None
	\|\| !mLockPatternUtils.isLockScreenDisabled(
	KeyguardUpdateMonitor.getCurrentUser())) {
	showSecurityScreen(securityMode);
	} else {
	finish = true;
	}
	break;

	default:
	Log.v(TAG, "Bad security screen " + mCurrentSecuritySelection + ", fail safe");
	showPrimarySecurityScreen(false);
	break;
	}
	}
	if (finish) {
	mSecurityCallback.finish(strongAuth, targetUserId);
	}
	return finish;
	}

	/**
	* Switches to the given security view unless it's already being shown, in which case
	* this is a no-op.
	*
	* @param securityMode
	*/
	private void showSecurityScreen(SecurityMode securityMode) {
	if (DEBUG) Log.d(TAG, "showSecurityScreen(" + securityMode + ")");

	if (securityMode == mCurrentSecuritySelection) return;

	KeyguardSecurityView oldView = getSecurityView(mCurrentSecuritySelection);
	KeyguardSecurityView newView = getSecurityView(securityMode);

	// Emulate Activity life cycle
	if (oldView != null) {
	oldView.onPause();
	oldView.setKeyguardCallback(mNullCallback); // ignore requests from old view
	}
	if (securityMode != SecurityMode.None) {
	newView.onResume(KeyguardSecurityView.VIEW_REVEALED);
	newView.setKeyguardCallback(mCallback);
	}

	// Find and show this child.
	final int childCount = mSecurityViewFlipper.getChildCount();

	final int securityViewIdForMode = getSecurityViewIdForMode(securityMode);
	for (int i = 0; i < childCount; i++) {
	if (mSecurityViewFlipper.getChildAt(i).getId() == securityViewIdForMode) {
	mSecurityViewFlipper.setDisplayedChild(i);
	break;
	}
	}

	mCurrentSecuritySelection = securityMode;
	mSecurityCallback.onSecurityModeChanged(securityMode,
	securityMode != SecurityMode.None && newView.needsInput());
	}

	private KeyguardSecurityViewFlipper getFlipper() {
	for (int i = 0; i < getChildCount(); i++) {
	View child = getChildAt(i);
	if (child instanceof KeyguardSecurityViewFlipper) {
	return (KeyguardSecurityViewFlipper) child;
	}
	}
	return null;
	}

	private KeyguardSecurityCallback mCallback = new KeyguardSecurityCallback() {
	public void userActivity() {
	if (mSecurityCallback != null) {
	mSecurityCallback.userActivity();
	}
	}

	public void dismiss(boolean authenticated, int targetId) {
	mSecurityCallback.dismiss(authenticated, targetId);
	}

	public boolean isVerifyUnlockOnly() {
	return mIsVerifyUnlockOnly;
	}

	public void reportUnlockAttempt(int userId, boolean success, int timeoutMs) {
	KeyguardUpdateMonitor monitor = KeyguardUpdateMonitor.getInstance(mContext);
	if (success) {
	monitor.clearFailedUnlockAttempts();
	mLockPatternUtils.reportSuccessfulPasswordAttempt(userId);
	} else {
	KeyguardSecurityContainer.this.reportFailedUnlockAttempt(userId, timeoutMs);
	}
	}

	public void reset() {
	mSecurityCallback.reset();
	}
	};

	// The following is used to ignore callbacks from SecurityViews that are no longer current
	// (e.g. face unlock). This avoids unwanted asynchronous events from messing with the
	// state for the current security method.
	private KeyguardSecurityCallback mNullCallback = new KeyguardSecurityCallback() {
	@Override
	public void userActivity() { }
	@Override
	public void reportUnlockAttempt(int userId, boolean success, int timeoutMs) { }
	@Override
	public boolean isVerifyUnlockOnly() { return false; }
	@Override
	public void dismiss(boolean securityVerified, int targetUserId) { }
	@Override
	public void reset() {}
	};

	private int getSecurityViewIdForMode(SecurityMode securityMode) {
	switch (securityMode) {
	case Pattern: return R.id.keyguard_pattern_view;
	case PIN: return R.id.keyguard_pin_view;
	case Password: return R.id.keyguard_password_view;
	case SimPin: return R.id.keyguard_sim_pin_view;
	case SimPuk: return R.id.keyguard_sim_puk_view;
	}
	return 0;
	}

	@VisibleForTesting
	public int getLayoutIdFor(SecurityMode securityMode) {
	switch (securityMode) {
	case Pattern: return R.layout.keyguard_pattern_view;
	case PIN: return R.layout.keyguard_pin_view;
	case Password: return R.layout.keyguard_password_view;
	case SimPin: return R.layout.keyguard_sim_pin_view;
	case SimPuk: return R.layout.keyguard_sim_puk_view;
	default:
	return 0;
	}
	}

	public SecurityMode getSecurityMode() {
	return mSecurityModel.getSecurityMode(KeyguardUpdateMonitor.getCurrentUser());
	}

	public SecurityMode getCurrentSecurityMode() {
	return mCurrentSecuritySelection;
	}

	public void verifyUnlock() {
	mIsVerifyUnlockOnly = true;
	showSecurityScreen(getSecurityMode());
	}

	public SecurityMode getCurrentSecuritySelection() {
	return mCurrentSecuritySelection;
	}

	public void dismiss(boolean authenticated, int targetUserId) {
	mCallback.dismiss(authenticated, targetUserId);
	}

	public boolean needsInput() {
	return mSecurityViewFlipper.needsInput();
	}

	@Override
	public void setKeyguardCallback(KeyguardSecurityCallback callback) {
	mSecurityViewFlipper.setKeyguardCallback(callback);
	}

	@Override
	public void reset() {
	mSecurityViewFlipper.reset();
	}

	@Override
	public KeyguardSecurityCallback getCallback() {
	return mSecurityViewFlipper.getCallback();
	}

	@Override
	public void showPromptReason(int reason) {
	if (mCurrentSecuritySelection != SecurityMode.None) {
	if (reason != PROMPT_REASON_NONE) {
	Log.i(TAG, "Strong auth required, reason: " + reason);
	}
	getSecurityView(mCurrentSecuritySelection).showPromptReason(reason);
	}
	}


	public void showMessage(String message, int color) {
	if (mCurrentSecuritySelection != SecurityMode.None) {
	getSecurityView(mCurrentSecuritySelection).showMessage(message, color);
	}
	}

	@Override
	public void showUsabilityHint() {
	mSecurityViewFlipper.showUsabilityHint();
	}

	}