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.app.Fragment;
21 import android.content.ComponentName;
22 import android.content.Context;
23 import android.content.pm.PackageManager;
24 import android.os.Bundle;
25 import android.provider.Settings;
26 import android.text.TextUtils;
27 import android.view.accessibility.AccessibilityManager;
28 
29 import androidx.annotation.Keep;
30 import androidx.leanback.preference.LeanbackSettingsFragment;
31 import androidx.preference.Preference;
32 import androidx.preference.PreferenceScreen;
33 
34 import com.android.internal.logging.nano.MetricsProto;
35 import com.android.tv.settings.R;
36 import com.android.tv.settings.RadioPreference;
37 import com.android.tv.settings.SettingsPreferenceFragment;
38 
39 import java.util.List;
40 
41 /**
42  * Fragment imitating a single-selection list for picking the accessibility shortcut service
43  */
44 @Keep
45 public class AccessibilityShortcutServiceFragment extends SettingsPreferenceFragment implements
46         AccessibilityServiceConfirmationFragment.OnAccessibilityServiceConfirmedListener {
47     private static final String SERVICE_RADIO_GROUP = "service_group";
48 
49     private final Preference.OnPreferenceChangeListener mPreferenceChangeListener =
50             (preference, newValue) -> {
51                 final String newCompString = preference.getKey();
52                 final String currentService =
53                         AccessibilityShortcutFragment.getCurrentService(getContext());
54                 if ((Boolean) newValue && !TextUtils.equals(newCompString, currentService)) {
55                     final ComponentName cn = ComponentName.unflattenFromString(newCompString);
56                     final CharSequence label = preference.getTitle();
57                     final Fragment confirmFragment =
58                             AccessibilityServiceConfirmationFragment.newInstance(cn, label, true);
59                     confirmFragment.setTargetFragment(AccessibilityShortcutServiceFragment.this, 0);
60 
61                     final Fragment settingsFragment = getCallbackFragment();
62                     if (settingsFragment instanceof LeanbackSettingsFragment) {
63                         ((LeanbackSettingsFragment) settingsFragment)
64                                 .startImmersiveFragment(confirmFragment);
65                     } else {
66                         throw new IllegalStateException("Not attached to settings fragment??");
67                     }
68                 }
69                 return false;
70             };
71 
72     @Override
onCreatePreferences(Bundle savedInstanceState, String rootKey)73     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
74         setPreferencesFromResource(R.xml.accessibility_shortcut_service, null);
75 
76         final PreferenceScreen screen = getPreferenceScreen();
77         final Context themedContext = getPreferenceManager().getContext();
78 
79         final List<AccessibilityServiceInfo> installedServices = getContext()
80                 .getSystemService(AccessibilityManager.class)
81                 .getInstalledAccessibilityServiceList();
82         final PackageManager packageManager = getContext().getPackageManager();
83         final String currentService = AccessibilityShortcutFragment.getCurrentService(getContext());
84         for (AccessibilityServiceInfo service : installedServices) {
85             final RadioPreference preference = new RadioPreference(themedContext);
86             preference.setPersistent(false);
87             preference.setRadioGroup(SERVICE_RADIO_GROUP);
88             preference.setOnPreferenceChangeListener(mPreferenceChangeListener);
89 
90             final String serviceString = service.getComponentName().flattenToString();
91             if (TextUtils.equals(currentService, serviceString)) {
92                 preference.setChecked(true);
93             }
94             preference.setKey(serviceString);
95             preference.setTitle(service.getResolveInfo().loadLabel(packageManager));
96 
97             screen.addPreference(preference);
98         }
99     }
100 
101     @Override
onAccessibilityServiceConfirmed(ComponentName componentName, boolean enabling)102     public void onAccessibilityServiceConfirmed(ComponentName componentName, boolean enabling) {
103         final String componentString = componentName.flattenToString();
104         Settings.Secure.putString(getContext().getContentResolver(),
105                 Settings.Secure.ACCESSIBILITY_SHORTCUT_TARGET_SERVICE,
106                 componentString);
107         getFragmentManager().popBackStack();
108     }
109 
110     @Override
getMetricsCategory()111     public int getMetricsCategory() {
112         return MetricsProto.MetricsEvent.ACCESSIBILITY_SERVICE;
113     }
114 }
115