1 /*
2  * Copyright (C) 2017 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.tv.settings.accessibility;
18 
19 import android.accessibilityservice.AccessibilityServiceInfo;
20 import android.content.ComponentName;
21 import android.content.pm.ServiceInfo;
22 import android.os.Bundle;
23 import android.provider.Settings;
24 import android.text.TextUtils;
25 import android.view.accessibility.AccessibilityManager;
26 
27 import androidx.annotation.Keep;
28 import androidx.preference.Preference;
29 import androidx.preference.PreferenceGroup;
30 import androidx.preference.SwitchPreference;
31 import androidx.preference.TwoStatePreference;
32 
33 import com.android.internal.logging.nano.MetricsProto;
34 import com.android.settingslib.accessibility.AccessibilityUtils;
35 import com.android.tv.settings.R;
36 import com.android.tv.settings.SettingsPreferenceFragment;
37 
38 import java.util.List;
39 import java.util.Set;
40 
41 /**
42  * Fragment for Accessibility settings
43  */
44 @Keep
45 public class AccessibilityFragment extends SettingsPreferenceFragment {
46     private static final String TOGGLE_HIGH_TEXT_CONTRAST_KEY = "toggle_high_text_contrast";
47     private static final String ACCESSIBILITY_SERVICES_KEY = "system_accessibility_services";
48 
49     private PreferenceGroup mServicesPref;
50 
51     /**
52      * Create a new instance of the fragment
53      * @return New fragment instance
54      */
newInstance()55     public static AccessibilityFragment newInstance() {
56         return new AccessibilityFragment();
57     }
58 
59     @Override
onResume()60     public void onResume() {
61         super.onResume();
62         if (mServicesPref != null) {
63             refreshServices(mServicesPref);
64         }
65     }
66 
67     @Override
onCreatePreferences(Bundle savedInstanceState, String rootKey)68     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
69         setPreferencesFromResource(R.xml.accessibility, null);
70 
71         final TwoStatePreference highContrastPreference =
72                 (TwoStatePreference) findPreference(TOGGLE_HIGH_TEXT_CONTRAST_KEY);
73         highContrastPreference.setChecked(Settings.Secure.getInt(getContext().getContentResolver(),
74                 Settings.Secure.ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED, 0) == 1);
75 
76         mServicesPref = (PreferenceGroup) findPreference(ACCESSIBILITY_SERVICES_KEY);
77         refreshServices(mServicesPref);
78     }
79 
80     @Override
onPreferenceTreeClick(Preference preference)81     public boolean onPreferenceTreeClick(Preference preference) {
82         if (TextUtils.equals(preference.getKey(), TOGGLE_HIGH_TEXT_CONTRAST_KEY)) {
83             Settings.Secure.putInt(getActivity().getContentResolver(),
84                     Settings.Secure.ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED,
85                     (((SwitchPreference) preference).isChecked() ? 1 : 0));
86             return true;
87         } else {
88             return super.onPreferenceTreeClick(preference);
89         }
90     }
91 
refreshServices(PreferenceGroup group)92     private void refreshServices(PreferenceGroup group) {
93         final List<AccessibilityServiceInfo> installedServiceInfos =
94                 getActivity().getSystemService(AccessibilityManager.class)
95                         .getInstalledAccessibilityServiceList();
96         final Set<ComponentName> enabledServices =
97                 AccessibilityUtils.getEnabledServicesFromSettings(getActivity());
98         final boolean accessibilityEnabled = Settings.Secure.getInt(
99                 getActivity().getContentResolver(),
100                 Settings.Secure.ACCESSIBILITY_ENABLED, 0) == 1;
101 
102         for (final AccessibilityServiceInfo accInfo : installedServiceInfos) {
103             final ServiceInfo serviceInfo = accInfo.getResolveInfo().serviceInfo;
104             final ComponentName componentName = new ComponentName(serviceInfo.packageName,
105                     serviceInfo.name);
106 
107             final boolean serviceEnabled = accessibilityEnabled
108                     && enabledServices.contains(componentName);
109 
110             final String title = accInfo.getResolveInfo()
111                     .loadLabel(getActivity().getPackageManager()).toString();
112 
113             final String key = "ServicePref:" + componentName.flattenToString();
114             Preference servicePref = findPreference(key);
115             if (servicePref == null) {
116                 servicePref = new Preference(group.getContext());
117                 servicePref.setKey(key);
118             }
119             servicePref.setTitle(title);
120             servicePref.setSummary(serviceEnabled ? R.string.settings_on : R.string.settings_off);
121             servicePref.setFragment(AccessibilityServiceFragment.class.getName());
122             AccessibilityServiceFragment.prepareArgs(servicePref.getExtras(),
123                     serviceInfo.packageName,
124                     serviceInfo.name,
125                     accInfo.getSettingsActivityName(),
126                     title);
127             group.addPreference(servicePref);
128         }
129     }
130 
131     @Override
getMetricsCategory()132     public int getMetricsCategory() {
133         return MetricsProto.MetricsEvent.ACCESSIBILITY;
134     }
135 }
136