1 /*
2  * Copyright (C) 2018 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.device.apps.specialaccess;
18 
19 import android.Manifest;
20 import android.app.AppOpsManager;
21 import android.os.Bundle;
22 
23 import androidx.annotation.Keep;
24 import androidx.annotation.NonNull;
25 import androidx.preference.Preference;
26 import androidx.preference.PreferenceGroup;
27 import androidx.preference.SwitchPreference;
28 import androidx.preference.TwoStatePreference;
29 
30 import com.android.internal.logging.nano.MetricsProto;
31 import com.android.settingslib.applications.ApplicationsState;
32 import com.android.tv.settings.R;
33 
34 /**
35  * Settings screen for managing "Display over other apps" permission
36  */
37 @Keep
38 public class SystemAlertWindow extends ManageAppOp {
39 
40     private AppOpsManager mAppOpsManager;
41 
42     @Override
getMetricsCategory()43     public int getMetricsCategory() {
44         return MetricsProto.MetricsEvent.SYSTEM_ALERT_WINDOW_APPS;
45     }
46 
47     @Override
onCreate(Bundle savedInstanceState)48     public void onCreate(Bundle savedInstanceState) {
49         super.onCreate(savedInstanceState);
50         mAppOpsManager = getContext().getSystemService(AppOpsManager.class);
51     }
52 
53     @Override
getAppOpsOpCode()54     public int getAppOpsOpCode() {
55         return AppOpsManager.OP_SYSTEM_ALERT_WINDOW;
56     }
57 
58     @Override
getPermission()59     public String getPermission() {
60         return Manifest.permission.SYSTEM_ALERT_WINDOW;
61     }
62 
63     @Override
onCreatePreferences(Bundle savedInstanceState, String rootKey)64     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
65         setPreferencesFromResource(R.xml.system_alert_window, null);
66     }
67 
68     @NonNull
69     @Override
bindPreference(@onNull Preference preference, ApplicationsState.AppEntry entry)70     public Preference bindPreference(@NonNull Preference preference,
71             ApplicationsState.AppEntry entry) {
72         final TwoStatePreference switchPref = (SwitchPreference) preference;
73         switchPref.setTitle(entry.label);
74         switchPref.setKey(entry.info.packageName);
75         switchPref.setIcon(entry.icon);
76         switchPref.setOnPreferenceChangeListener((pref, newValue) -> {
77             setSystemAlertWindowAccess(entry, (Boolean) newValue);
78             return true;
79         });
80 
81         switchPref.setSummary(getPreferenceSummary(entry));
82         switchPref.setChecked(((PermissionState) entry.extraInfo).isAllowed());
83 
84         return switchPref;
85     }
86 
87     @NonNull
88     @Override
createAppPreference()89     public Preference createAppPreference() {
90         return new SwitchPreference(getPreferenceManager().getContext());
91     }
92 
93     @NonNull
94     @Override
getAppPreferenceGroup()95     public PreferenceGroup getAppPreferenceGroup() {
96         return getPreferenceScreen();
97     }
98 
setSystemAlertWindowAccess(ApplicationsState.AppEntry entry, boolean grant)99     private void setSystemAlertWindowAccess(ApplicationsState.AppEntry entry, boolean grant) {
100         mAppOpsManager.setMode(AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
101                 entry.info.uid, entry.info.packageName,
102                 grant ? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED);
103         updateAppList();
104     }
105 
getPreferenceSummary(ApplicationsState.AppEntry entry)106     private CharSequence getPreferenceSummary(ApplicationsState.AppEntry entry) {
107         if (entry.extraInfo instanceof PermissionState) {
108             return getContext().getText(((PermissionState) entry.extraInfo).isAllowed()
109                     ? R.string.app_permission_summary_allowed
110                     : R.string.app_permission_summary_not_allowed);
111         } else {
112             return null;
113         }
114     }
115 }
116