1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* Copyright (C) 2017 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.tv.settings.accessibility;
import static android.content.Context.ACCESSIBILITY_SERVICE;
import static com.android.tv.settings.util.InstrumentationUtils.logToggleInteracted;
import android.accessibilityservice.AccessibilityServiceInfo;
import android.app.admin.DevicePolicyManager;
import android.app.tvsettings.TvSettingsEnums;
import android.content.ComponentName;
import android.content.pm.ServiceInfo;
import android.os.Bundle;
import android.os.UserHandle;
import android.provider.Settings;
import android.text.TextUtils;
import android.view.accessibility.AccessibilityManager;
import androidx.annotation.Keep;
import androidx.preference.Preference;
import androidx.preference.PreferenceGroup;
import androidx.preference.SwitchPreference;
import androidx.preference.TwoStatePreference;
import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
import com.android.settingslib.RestrictedLockUtilsInternal;
import com.android.settingslib.RestrictedPreference;
import com.android.settingslib.accessibility.AccessibilityUtils;
import com.android.tv.settings.R;
import com.android.tv.settings.SettingsPreferenceFragment;
import java.util.List;
import java.util.Set;
/**
* Fragment for Accessibility settings
*/
@Keep
public class AccessibilityFragment extends SettingsPreferenceFragment {
private static final String TOGGLE_HIGH_TEXT_CONTRAST_KEY = "toggle_high_text_contrast";
private static final String TOGGLE_AUDIO_DESCRIPTION_KEY = "toggle_audio_description";
private static final String ACCESSIBILITY_SERVICES_KEY = "system_accessibility_services";
private PreferenceGroup mServicesPref;
private AccessibilityManager.AccessibilityStateChangeListener
mAccessibilityStateChangeListener = enabled -> refreshServices(mServicesPref);
/**
* Create a new instance of the fragment
* @return New fragment instance
*/
public static AccessibilityFragment newInstance() {
return new AccessibilityFragment();
}
@Override
public void onResume() {
super.onResume();
if (mServicesPref != null) {
refreshServices(mServicesPref);
}
}
@Override
public void onStop() {
super.onStop();
AccessibilityManager am = (AccessibilityManager)
getContext().getSystemService(ACCESSIBILITY_SERVICE);
if (am != null && mServicesPref != null) {
am.removeAccessibilityStateChangeListener(mAccessibilityStateChangeListener);
}
}
@Override
public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
setPreferencesFromResource(R.xml.accessibility, null);
final TwoStatePreference highContrastPreference =
(TwoStatePreference) findPreference(TOGGLE_HIGH_TEXT_CONTRAST_KEY);
highContrastPreference.setChecked(Settings.Secure.getInt(getContext().getContentResolver(),
Settings.Secure.ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED, 0) == 1);
final TwoStatePreference audioDescriptionPreference =
(TwoStatePreference) findPreference(TOGGLE_AUDIO_DESCRIPTION_KEY);
audioDescriptionPreference.setChecked(Settings.Secure.getInt(
getContext().getContentResolver(),
Settings.Secure.ENABLED_ACCESSIBILITY_AUDIO_DESCRIPTION_BY_DEFAULT, 0) == 1);
mServicesPref = (PreferenceGroup) findPreference(ACCESSIBILITY_SERVICES_KEY);
if (mServicesPref != null) {
refreshServices(mServicesPref);
AccessibilityManager am = (AccessibilityManager)
getContext().getSystemService(ACCESSIBILITY_SERVICE);
if (am != null) {
am.addAccessibilityStateChangeListener(mAccessibilityStateChangeListener);
}
}
}
@Override
public boolean onPreferenceTreeClick(Preference preference) {
if (TextUtils.equals(preference.getKey(), TOGGLE_HIGH_TEXT_CONTRAST_KEY)) {
logToggleInteracted(
TvSettingsEnums.SYSTEM_A11Y_HIGH_CONTRAST_TEXT,
((SwitchPreference) preference).isChecked());
Settings.Secure.putInt(getActivity().getContentResolver(),
Settings.Secure.ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED,
(((SwitchPreference) preference).isChecked() ? 1 : 0));
return true;
} else if (TextUtils.equals(preference.getKey(), TOGGLE_AUDIO_DESCRIPTION_KEY)) {
logToggleInteracted(
TvSettingsEnums.SYSTEM_A11Y_AUDIO_DESCRIPTION,
((SwitchPreference) preference).isChecked());
Settings.Secure.putInt(getActivity().getContentResolver(),
Settings.Secure.ENABLED_ACCESSIBILITY_AUDIO_DESCRIPTION_BY_DEFAULT,
(((SwitchPreference) preference).isChecked() ? 1 : 0));
return true;
} else {
return super.onPreferenceTreeClick(preference);
}
}
private void refreshServices(PreferenceGroup group) {
DevicePolicyManager dpm = getContext().getSystemService(DevicePolicyManager.class);
final List<AccessibilityServiceInfo> installedServiceInfos =
getActivity().getSystemService(AccessibilityManager.class)
.getInstalledAccessibilityServiceList();
final Set<ComponentName> enabledServices =
AccessibilityUtils.getEnabledServicesFromSettings(getActivity());
final List<String> permittedServices = dpm.getPermittedAccessibilityServices(
UserHandle.myUserId());
final boolean accessibilityEnabled = Settings.Secure.getInt(
getActivity().getContentResolver(),
Settings.Secure.ACCESSIBILITY_ENABLED, 0) == 1;
for (final AccessibilityServiceInfo accInfo : installedServiceInfos) {
final ServiceInfo serviceInfo = accInfo.getResolveInfo().serviceInfo;
final ComponentName componentName = new ComponentName(serviceInfo.packageName,
serviceInfo.name);
final boolean serviceEnabled = accessibilityEnabled
&& enabledServices.contains(componentName);
// permittedServices null means all accessibility services are allowed.
final boolean serviceAllowed = permittedServices == null
|| permittedServices.contains(serviceInfo.packageName);
final String title = accInfo.getResolveInfo()
.loadLabel(getActivity().getPackageManager()).toString();
final String key = "ServicePref:" + componentName.flattenToString();
RestrictedPreference servicePref = findPreference(key);
if (servicePref == null) {
servicePref = new RestrictedPreference(group.getContext());
servicePref.setKey(key);
}
servicePref.setTitle(title);
servicePref.setSummary(serviceEnabled ? R.string.settings_on : R.string.settings_off);
AccessibilityServiceFragment.prepareArgs(servicePref.getExtras(),
serviceInfo.packageName,
serviceInfo.name,
accInfo.getSettingsActivityName(),
title);
if (serviceAllowed || serviceEnabled) {
servicePref.setEnabled(true);
servicePref.setFragment(AccessibilityServiceFragment.class.getName());
} else {
// Disable accessibility service that are not permitted.
final EnforcedAdmin admin =
RestrictedLockUtilsInternal.checkIfAccessibilityServiceDisallowed(
getContext(), serviceInfo.packageName, UserHandle.myUserId());
if (admin != null) {
servicePref.setDisabledByAdmin(admin);
} else {
servicePref.setEnabled(false);
}
servicePref.setFragment(null);
}
group.addPreference(servicePref);
}
}
@Override
protected int getPageId() {
return TvSettingsEnums.SYSTEM_A11Y;
}
}
|
