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      1 /*
      2  * Copyright (C) 2014 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.users;
     18 
     19 import android.app.ActivityManager;
     20 import android.app.Service;
     21 import android.app.UserSwitchObserver;
     22 import android.content.BroadcastReceiver;
     23 import android.content.ComponentName;
     24 import android.content.Context;
     25 import android.content.Intent;
     26 import android.content.SharedPreferences;
     27 import android.content.pm.PackageManager;
     28 import android.os.IBinder;
     29 import android.os.RemoteException;
     30 import android.os.UserHandle;
     31 import android.os.UserManager;
     32 import android.util.Log;
     33 
     34 import com.android.tv.settings.system.SecurityFragment;
     35 
     36 public class UserSwitchListenerService extends Service {
     37 
     38     private static final boolean DEBUG = false;
     39     private static final String TAG = "RestrictedProfile";
     40 
     41     private static final String RESTRICTED_PROFILE_LAUNCHER_ENTRY_ACTIVITY =
     42             "com.android.tv.settings.users.RestrictedProfileActivityLauncherEntry";
     43     private static final String SHARED_PREFERENCES_NAME = "RestrictedProfileSharedPreferences";
     44     private static final String
     45             ON_BOOT_USER_ID_PREFERENCE = "UserSwitchOnBootBroadcastReceiver.userId";
     46 
     47     public static class BootReceiver extends BroadcastReceiver {
     48         @Override
     49         public void onReceive(final Context context, Intent intent) {
     50 
     51             boolean isSystemUser = UserManager.get(context).isSystemUser();
     52 
     53             if (isSystemUser) {
     54                 context.startService(new Intent(context, UserSwitchListenerService.class));
     55                 int bootUserId = getBootUser(context);
     56                 if (DEBUG) {
     57                     Log.d(TAG,
     58                             "boot completed, user is " + UserHandle.myUserId()
     59                             + " boot user id: "
     60                             + bootUserId);
     61                 }
     62                 if (UserHandle.myUserId() != bootUserId) {
     63                     switchUserNow(bootUserId);
     64                 }
     65             }
     66 
     67             updateLaunchPoint(context, null != SecurityFragment.findRestrictedUser(
     68                     (UserManager) context.getSystemService(Context.USER_SERVICE)));
     69         }
     70     }
     71 
     72     public static void updateLaunchPoint(Context context, boolean enableLaunchPoint) {
     73         if (DEBUG) {
     74             Log.d(TAG, "updating launch point: " + enableLaunchPoint);
     75         }
     76 
     77         PackageManager pm = context.getPackageManager();
     78         ComponentName compName = new ComponentName(context,
     79                 RESTRICTED_PROFILE_LAUNCHER_ENTRY_ACTIVITY);
     80         pm.setComponentEnabledSetting(compName,
     81                 enableLaunchPoint ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
     82                         : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
     83                 PackageManager.DONT_KILL_APP);
     84     }
     85 
     86     static void setBootUser(Context context, int userId) {
     87         SharedPreferences.Editor editor = context.getSharedPreferences(SHARED_PREFERENCES_NAME,
     88                 Context.MODE_PRIVATE).edit();
     89         editor.putInt(ON_BOOT_USER_ID_PREFERENCE, userId);
     90         editor.apply();
     91     }
     92 
     93     static int getBootUser(Context context) {
     94         SharedPreferences prefs = context.getSharedPreferences(SHARED_PREFERENCES_NAME,
     95                 Context.MODE_PRIVATE);
     96         return prefs.getInt(ON_BOOT_USER_ID_PREFERENCE, UserHandle.USER_SYSTEM);
     97     }
     98 
     99     private static void switchUserNow(int userId) {
    100         try {
    101             ActivityManager.getService().switchUser(userId);
    102         } catch (RemoteException re) {
    103             Log.e(TAG, "Caught exception while switching user! ", re);
    104         }
    105     }
    106 
    107     @Override
    108     public void onCreate() {
    109         super.onCreate();
    110         try {
    111             ActivityManager.getService().registerUserSwitchObserver(
    112                     new UserSwitchObserver() {
    113                         @Override
    114                         public void onUserSwitchComplete(int newUserId) throws RemoteException {
    115                             if (DEBUG) {
    116                                 Log.d(TAG, "user has been foregrounded: " + newUserId);
    117                             }
    118                             setBootUser(UserSwitchListenerService.this, newUserId);
    119                         }
    120                     }, UserSwitchListenerService.class.getName());
    121         } catch (RemoteException e) {
    122         }
    123     }
    124 
    125     @Override
    126     public int onStartCommand(Intent intent, int flags, int startId) {
    127         return START_STICKY;
    128     }
    129 
    130     @Override
    131     public IBinder onBind(Intent intent) {
    132         return null;
    133     }
    134 }
    135