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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 com.android.internal.widget.LockPatternUtils;
     20 
     21 import android.app.Activity;
     22 import android.app.Fragment;
     23 import android.app.admin.DevicePolicyManager;
     24 import android.content.Intent;
     25 
     26 public final class ChooseLockSettingsHelper {
     27 
     28     static final String EXTRA_KEY_PASSWORD = "password";
     29 
     30     private LockPatternUtils mLockPatternUtils;
     31     private Activity mActivity;
     32     private Fragment mFragment;
     33 
     34     public ChooseLockSettingsHelper(Activity activity) {
     35         mActivity = activity;
     36         mLockPatternUtils = new LockPatternUtils(activity);
     37     }
     38 
     39     public ChooseLockSettingsHelper(Activity activity, Fragment fragment) {
     40         this(activity);
     41         mFragment = fragment;
     42     }
     43 
     44     public LockPatternUtils utils() {
     45         return mLockPatternUtils;
     46     }
     47 
     48     /**
     49      * If a pattern, password or PIN exists, prompt the user before allowing them to change it.
     50      * @param message optional message to display about the action about to be done
     51      * @param details optional detail message to display
     52      * @return true if one exists and we launched an activity to confirm it
     53      * @see #onActivityResult(int, int, android.content.Intent)
     54      */
     55     boolean launchConfirmationActivity(int request, CharSequence message, CharSequence details) {
     56         boolean launched = false;
     57         switch (mLockPatternUtils.getKeyguardStoredPasswordQuality()) {
     58             case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
     59                 launched = confirmPattern(request, message, details);
     60                 break;
     61             case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
     62             case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC:
     63             case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC:
     64             case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX:
     65                 // TODO: update UI layout for ConfirmPassword to show message and details
     66                 launched = confirmPassword(request);
     67                 break;
     68         }
     69         return launched;
     70     }
     71 
     72     /**
     73      * Launch screen to confirm the existing lock pattern.
     74      * @param message shown in header of ConfirmLockPattern if not null
     75      * @param details shown in footer of ConfirmLockPattern if not null
     76      * @see #onActivityResult(int, int, android.content.Intent)
     77      * @return true if we launched an activity to confirm pattern
     78      */
     79     private boolean confirmPattern(int request, CharSequence message, CharSequence details) {
     80         if (!mLockPatternUtils.isLockPatternEnabled() || !mLockPatternUtils.savedPatternExists()) {
     81             return false;
     82         }
     83         final Intent intent = new Intent();
     84         // supply header and footer text in the intent
     85         intent.putExtra(ConfirmLockPattern.HEADER_TEXT, message);
     86         intent.putExtra(ConfirmLockPattern.FOOTER_TEXT, details);
     87         intent.setClassName("com.android.settings", "com.android.settings.ConfirmLockPattern");
     88         if (mFragment != null) {
     89             mFragment.startActivityForResult(intent, request);
     90         } else {
     91             mActivity.startActivityForResult(intent, request);
     92         }
     93         return true;
     94     }
     95 
     96     /**
     97      * Launch screen to confirm the existing lock password.
     98      * @see #onActivityResult(int, int, android.content.Intent)
     99      * @return true if we launched an activity to confirm password
    100      */
    101     private boolean confirmPassword(int request) {
    102         if (!mLockPatternUtils.isLockPasswordEnabled()) return false;
    103         final Intent intent = new Intent();
    104         intent.setClassName("com.android.settings", "com.android.settings.ConfirmLockPassword");
    105         if (mFragment != null) {
    106             mFragment.startActivityForResult(intent, request);
    107         } else {
    108             mActivity.startActivityForResult(intent, request);
    109         }
    110         return true;
    111     }
    112 
    113 
    114 }
    115