src/com/android/settings/EncryptionInterstitial.java

   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 }