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      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.device.apps.specialaccess;
     18 
     19 import android.app.NotificationManager;
     20 import android.content.ComponentName;
     21 import android.content.Context;
     22 import android.content.pm.PackageItemInfo;
     23 import android.content.pm.PackageManager;
     24 import android.content.pm.ServiceInfo;
     25 import android.os.Bundle;
     26 import android.os.UserHandle;
     27 import android.provider.Settings;
     28 import android.service.notification.NotificationListenerService;
     29 import android.support.annotation.Keep;
     30 import android.support.v14.preference.SwitchPreference;
     31 import android.support.v7.preference.Preference;
     32 import android.support.v7.preference.PreferenceScreen;
     33 import android.util.IconDrawableFactory;
     34 import android.util.Log;
     35 
     36 import com.android.internal.logging.nano.MetricsProto;
     37 import com.android.settingslib.applications.ServiceListing;
     38 import com.android.tv.settings.R;
     39 import com.android.tv.settings.SettingsPreferenceFragment;
     40 
     41 import java.util.List;
     42 
     43 /**
     44  * Settings screen for managing notification listener permissions
     45  */
     46 @Keep
     47 public class NotificationAccess extends SettingsPreferenceFragment {
     48     private static final String TAG = "NotificationAccess";
     49 
     50     private static final String HEADER_KEY = "header";
     51 
     52     private NotificationManager mNotificationManager;
     53     private PackageManager mPackageManager;
     54     private ServiceListing mServiceListing;
     55     private IconDrawableFactory mIconDrawableFactory;
     56 
     57     @Override
     58     public int getMetricsCategory() {
     59         return MetricsProto.MetricsEvent.NOTIFICATION_ACCESS;
     60     }
     61 
     62     @Override
     63     public void onAttach(Context context) {
     64         super.onAttach(context);
     65         mPackageManager = context.getPackageManager();
     66         mNotificationManager = context.getSystemService(NotificationManager.class);
     67         mIconDrawableFactory = IconDrawableFactory.newInstance(context);
     68     }
     69 
     70     @Override
     71     public void onCreate(Bundle savedInstanceState) {
     72         super.onCreate(savedInstanceState);
     73         mServiceListing = new ServiceListing.Builder(getContext())
     74                 .setTag(TAG)
     75                 .setSetting(Settings.Secure.ENABLED_NOTIFICATION_LISTENERS)
     76                 .setIntentAction(NotificationListenerService.SERVICE_INTERFACE)
     77                 .setPermission(android.Manifest.permission.BIND_NOTIFICATION_LISTENER_SERVICE)
     78                 .setNoun("notification listener")
     79                 .build();
     80         mServiceListing.addCallback(this::updateList);
     81     }
     82 
     83     @Override
     84     public void onResume() {
     85         super.onResume();
     86         mServiceListing.reload();
     87         mServiceListing.setListening(true);
     88     }
     89 
     90     @Override
     91     public void onPause() {
     92         super.onPause();
     93         mServiceListing.setListening(false);
     94     }
     95 
     96     @Override
     97     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
     98         setPreferencesFromResource(R.xml.notification_access, null);
     99     }
    100 
    101     private void updateList(List<ServiceInfo> services) {
    102         final PreferenceScreen screen = getPreferenceScreen();
    103         final Preference header = screen.findPreference(HEADER_KEY);
    104         screen.removeAll();
    105         if (header != null) {
    106             screen.addPreference(header);
    107         }
    108         services.sort(new PackageItemInfo.DisplayNameComparator(mPackageManager));
    109         for (ServiceInfo service : services) {
    110             final ComponentName cn = new ComponentName(service.packageName, service.name);
    111             CharSequence title = null;
    112             try {
    113                 title = mPackageManager.getApplicationInfo(
    114                         service.packageName, 0).loadLabel(mPackageManager);
    115             } catch (PackageManager.NameNotFoundException e) {
    116                 // unlikely, as we are iterating over live services.
    117                 Log.w(TAG, "can't find package name", e);
    118             }
    119             final String summary = service.loadLabel(mPackageManager).toString();
    120             final SwitchPreference pref = new SwitchPreference(getPreferenceManager().getContext());
    121             pref.setPersistent(false);
    122             pref.setIcon(mIconDrawableFactory.getBadgedIcon(service, service.applicationInfo,
    123                     UserHandle.getUserId(service.applicationInfo.uid)));
    124             if (title != null && !title.equals(summary)) {
    125                 pref.setTitle(title);
    126                 pref.setSummary(summary);
    127             } else {
    128                 pref.setTitle(summary);
    129             }
    130             pref.setKey(cn.flattenToString());
    131             pref.setChecked(mNotificationManager.isNotificationListenerAccessGranted(cn));
    132             pref.setOnPreferenceChangeListener((preference, newValue) -> {
    133                 final boolean enable = (boolean) newValue;
    134                 mNotificationManager.setNotificationListenerAccessGranted(cn, enable);
    135                 return true;
    136             });
    137             screen.addPreference(pref);
    138         }
    139         if (services.isEmpty()) {
    140             final Preference preference = new Preference(getPreferenceManager().getContext());
    141             preference.setTitle(R.string.no_notification_listeners);
    142         }
    143     }
    144 
    145 }
    146