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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.ActivityManagerNative;
     20 import android.app.IUserSwitchObserver;
     21 import android.app.Service;
     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.IRemoteCallback;
     30 import android.os.RemoteException;
     31 import android.os.UserHandle;
     32 import android.os.UserManager;
     33 import android.util.Log;
     34 
     35 import com.android.tv.settings.system.SecurityFragment;
     36 
     37 public class UserSwitchListenerService extends Service {
     38 
     39     private static final boolean DEBUG = false;
     40     private static final String TAG = "RestrictedProfile";
     41 
     42     private static final String RESTRICTED_PROFILE_LAUNCHER_ENTRY_ACTIVITY =
     43             "com.android.tv.settings.users.RestrictedProfileActivityLauncherEntry";
     44     private static final String SHARED_PREFERENCES_NAME = "RestrictedProfileSharedPreferences";
     45     private static final String
     46             ON_BOOT_USER_ID_PREFERENCE = "UserSwitchOnBootBroadcastReceiver.userId";
     47 
     48     public static class BootReceiver extends BroadcastReceiver {
     49         @Override
     50         public void onReceive(final Context context, Intent intent) {
     51 
     52             boolean isSystemUser = UserManager.get(context).isSystemUser();
     53 
     54             if (isSystemUser) {
     55                 context.startService(new Intent(context, UserSwitchListenerService.class));
     56                 int bootUserId = getBootUser(context);
     57                 if (DEBUG) {
     58                     Log.d(TAG,
     59                             "boot completed, user is " + UserHandle.myUserId()
     60                             + " boot user id: "
     61                             + bootUserId);
     62                 }
     63                 if (UserHandle.myUserId() != bootUserId) {
     64                     switchUserNow(bootUserId);
     65                 }
     66             }
     67 
     68             updateLaunchPoint(context, null != SecurityFragment.findRestrictedUser(
     69                     (UserManager) context.getSystemService(Context.USER_SERVICE)));
     70         }
     71     }
     72 
     73     public static void updateLaunchPoint(Context context, boolean enableLaunchPoint) {
     74         if (DEBUG) {
     75             Log.d(TAG, "updating launch point: " + enableLaunchPoint);
     76         }
     77 
     78         PackageManager pm = context.getPackageManager();
     79         ComponentName compName = new ComponentName(context,
     80                 RESTRICTED_PROFILE_LAUNCHER_ENTRY_ACTIVITY);
     81         pm.setComponentEnabledSetting(compName,
     82                 enableLaunchPoint ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
     83                         : PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
     84                 PackageManager.DONT_KILL_APP);
     85     }
     86 
     87     static void setBootUser(Context context, int userId) {
     88         SharedPreferences.Editor editor = context.getSharedPreferences(SHARED_PREFERENCES_NAME,
     89                 Context.MODE_PRIVATE).edit();
     90         editor.putInt(ON_BOOT_USER_ID_PREFERENCE, userId);
     91         editor.apply();
     92     }
     93 
     94     static int getBootUser(Context context) {
     95         SharedPreferences prefs = context.getSharedPreferences(SHARED_PREFERENCES_NAME,
     96                 Context.MODE_PRIVATE);
     97         return prefs.getInt(ON_BOOT_USER_ID_PREFERENCE, UserHandle.USER_SYSTEM);
     98     }
     99 
    100     private static void switchUserNow(int userId) {
    101         try {
    102             ActivityManagerNative.getDefault().switchUser(userId);
    103         } catch (RemoteException re) {
    104             Log.e(TAG, "Caught exception while switching user! ", re);
    105         }
    106     }
    107 
    108     @Override
    109     public void onCreate() {
    110         super.onCreate();
    111         try {
    112             ActivityManagerNative.getDefault().registerUserSwitchObserver(
    113                     new IUserSwitchObserver.Stub() {
    114                         @Override
    115                         public void onUserSwitching(int newUserId, IRemoteCallback reply) {
    116                         }
    117 
    118                         @Override
    119                         public void onUserSwitchComplete(int newUserId) throws RemoteException {
    120                             if (DEBUG) {
    121                                 Log.d(TAG, "user has been foregrounded: " + newUserId);
    122                             }
    123                             setBootUser(UserSwitchListenerService.this, newUserId);
    124                         }
    125 
    126                         @Override
    127                         public void onForegroundProfileSwitch(int profileId)
    128                             throws RemoteException {
    129                         }
    130                     });
    131         } catch (RemoteException e) {
    132         }
    133     }
    134 
    135     @Override
    136     public int onStartCommand(Intent intent, int flags, int startId) {
    137         return START_STICKY;
    138     }
    139 
    140     @Override
    141     public IBinder onBind(Intent intent) {
    142         return null;
    143     }
    144 }
    145