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      1 /*
      2  * Copyright (C) 2014 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 import com.android.settings.R;
     21 import com.android.settings.SettingsActivity;
     22 import com.android.settings.SettingsPreferenceFragment;
     23 
     24 import java.util.List;
     25 
     26 import android.accessibilityservice.AccessibilityServiceInfo;
     27 import android.app.AlertDialog;
     28 import android.app.Dialog;
     29 import android.app.admin.DevicePolicyManager;
     30 import android.content.Context;
     31 import android.content.DialogInterface;
     32 import android.content.DialogInterface.OnClickListener;
     33 import android.content.Intent;
     34 import android.os.Bundle;
     35 import android.view.LayoutInflater;
     36 import android.view.View;
     37 import android.view.ViewGroup;
     38 import android.view.accessibility.AccessibilityManager;
     39 import android.widget.RadioButton;
     40 import android.widget.TextView;
     41 
     42 public class EncryptionInterstitial extends SettingsActivity {
     43 
     44     private static final String EXTRA_PASSWORD_QUALITY = "extra_password_quality";
     45     public static final String EXTRA_REQUIRE_PASSWORD = "extra_require_password";
     46 
     47     @Override
     48     public Intent getIntent() {
     49         Intent modIntent = new Intent(super.getIntent());
     50         modIntent.putExtra(EXTRA_SHOW_FRAGMENT, EncryptionInterstitialFragment.class.getName());
     51         return modIntent;
     52     }
     53 
     54     @Override
     55     protected boolean isValidFragment(String fragmentName) {
     56         return EncryptionInterstitialFragment.class.getName().equals(fragmentName);
     57     }
     58 
     59     public static Intent createStartIntent(Context ctx, int quality,
     60             boolean requirePasswordDefault) {
     61         return new Intent(ctx, EncryptionInterstitial.class)
     62                 .putExtra(EXTRA_PREFS_SHOW_BUTTON_BAR, true)
     63                 .putExtra(EXTRA_PREFS_SET_BACK_TEXT, (String) null)
     64                 .putExtra(EXTRA_PREFS_SET_NEXT_TEXT, ctx.getString(
     65                         R.string.encryption_continue_button))
     66                 .putExtra(EXTRA_PASSWORD_QUALITY, quality)
     67                 .putExtra(EXTRA_SHOW_FRAGMENT_TITLE_RESID, R.string.encryption_interstitial_header)
     68                 .putExtra(EXTRA_REQUIRE_PASSWORD, requirePasswordDefault);
     69     }
     70 
     71     public static class EncryptionInterstitialFragment extends SettingsPreferenceFragment
     72             implements View.OnClickListener, OnClickListener {
     73 
     74         private static final int ACCESSIBILITY_WARNING_DIALOG = 1;
     75         private RadioButton mRequirePasswordToDecryptButton;
     76         private RadioButton mDontRequirePasswordToDecryptButton;
     77         private TextView mEncryptionMessage;
     78         private boolean mPasswordRequired;
     79 
     80         @Override
     81         public View onCreateView(LayoutInflater inflater, ViewGroup container,
     82                 Bundle savedInstanceState) {
     83             final int layoutId = R.layout.encryption_interstitial;
     84             View view = inflater.inflate(layoutId, container, false);
     85             mRequirePasswordToDecryptButton =
     86                     (RadioButton) view.findViewById(R.id.encrypt_require_password);
     87             mDontRequirePasswordToDecryptButton =
     88                     (RadioButton) view.findViewById(R.id.encrypt_dont_require_password);
     89             mEncryptionMessage =
     90                     (TextView) view.findViewById(R.id.encryption_message);
     91             int quality = getActivity().getIntent().getIntExtra(EXTRA_PASSWORD_QUALITY, 0);
     92             final int msgId;
     93             final int enableId;
     94             final int disableId;
     95             switch (quality) {
     96                 case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
     97                     msgId = R.string.encryption_interstitial_message_pattern;
     98                     enableId = R.string.encrypt_require_pattern;
     99                     disableId = R.string.encrypt_dont_require_pattern;
    100                     break;
    101                 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
    102                 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX:
    103                     msgId = R.string.encryption_interstitial_message_pin;
    104                     enableId = R.string.encrypt_require_pin;
    105                     disableId = R.string.encrypt_dont_require_pin;
    106                     break;
    107                 default:
    108                     msgId = R.string.encryption_interstitial_message_password;
    109                     enableId = R.string.encrypt_require_password;
    110                     disableId = R.string.encrypt_dont_require_password;
    111                     break;
    112             }
    113             mEncryptionMessage.setText(msgId);
    114 
    115             mRequirePasswordToDecryptButton.setOnClickListener(this);
    116             mRequirePasswordToDecryptButton.setText(enableId);
    117 
    118             mDontRequirePasswordToDecryptButton.setOnClickListener(this);
    119             mDontRequirePasswordToDecryptButton.setText(disableId);
    120 
    121             setRequirePasswordState(getActivity().getIntent().getBooleanExtra(
    122                     EXTRA_REQUIRE_PASSWORD, true));
    123             return view;
    124         }
    125 
    126         @Override
    127         public void onClick(View v) {
    128             if (v == mRequirePasswordToDecryptButton) {
    129                 final boolean accEn = AccessibilityManager.getInstance(getActivity()).isEnabled();
    130                 if (accEn && !mPasswordRequired) {
    131                     setRequirePasswordState(false); // clear the UI state
    132                     showDialog(ACCESSIBILITY_WARNING_DIALOG);
    133                 } else {
    134                     setRequirePasswordState(true);
    135                 }
    136             } else {
    137                 setRequirePasswordState(false);
    138             }
    139         }
    140 
    141         @Override
    142         public Dialog onCreateDialog(int dialogId) {
    143             switch(dialogId) {
    144                 case ACCESSIBILITY_WARNING_DIALOG: {
    145                     final int quality = new LockPatternUtils(getActivity())
    146                             .getKeyguardStoredPasswordQuality();
    147                     final int titleId;
    148                     final int messageId;
    149                     switch (quality) {
    150                         case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
    151                             titleId = R.string.encrypt_talkback_dialog_require_pattern;
    152                             messageId = R.string.encrypt_talkback_dialog_message_pattern;
    153                             break;
    154                         case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
    155                         case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX:
    156                             titleId = R.string.encrypt_talkback_dialog_require_pin;
    157                             messageId = R.string.encrypt_talkback_dialog_message_pin;
    158                             break;
    159                         default:
    160                             titleId = R.string.encrypt_talkback_dialog_require_password;
    161                             messageId = R.string.encrypt_talkback_dialog_message_password;
    162                             break;
    163                     }
    164 
    165 
    166                     List<AccessibilityServiceInfo> list =
    167                             AccessibilityManager.getInstance(getActivity())
    168                             .getEnabledAccessibilityServiceList(
    169                                     AccessibilityServiceInfo.FEEDBACK_ALL_MASK);
    170                     final CharSequence exampleAccessibility;
    171                     if (list.isEmpty()) {
    172                         // This should never happen.  But we shouldn't crash
    173                         exampleAccessibility = "";
    174                     } else {
    175                         exampleAccessibility = list.get(0).getResolveInfo()
    176                                 .loadLabel(getPackageManager());
    177                     }
    178                     return new AlertDialog.Builder(getActivity())
    179                         .setTitle(titleId)
    180                         .setMessage(getString(messageId, exampleAccessibility))
    181                         .setCancelable(true)
    182                         .setPositiveButton(android.R.string.ok, this)
    183                         .setNegativeButton(android.R.string.cancel, this)
    184                         .create();
    185                 }
    186                 default: throw new IllegalArgumentException();
    187             }
    188         }
    189 
    190         private void setRequirePasswordState(boolean required) {
    191             mPasswordRequired = required;
    192             mRequirePasswordToDecryptButton.setChecked(required);
    193             mDontRequirePasswordToDecryptButton.setChecked(!required);
    194 
    195             // Updates value returned by SettingsActivity.onActivityResult().
    196             SettingsActivity sa = (SettingsActivity)getActivity();
    197             Intent resultIntentData = sa.getResultIntentData();
    198             resultIntentData = resultIntentData == null ? new Intent() : resultIntentData;
    199             resultIntentData.putExtra(EXTRA_REQUIRE_PASSWORD, mPasswordRequired);
    200             sa.setResultIntentData(resultIntentData);
    201         }
    202 
    203         @Override
    204         public void onClick(DialogInterface dialog, int which) {
    205             if (which == DialogInterface.BUTTON_POSITIVE) {
    206                 setRequirePasswordState(true);
    207             } else if (which == DialogInterface.BUTTON_NEGATIVE) {
    208                 setRequirePasswordState(false);
    209             }
    210         }
    211     }
    212 }
    213