Home | History | Annotate | Download | only in app 
      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.internal.app;
     18 
     19 import static android.content.pm.PackageManager.MATCH_DEFAULT_ONLY;
     20 
     21 import android.app.Activity;
     22 import android.app.ActivityManagerNative;
     23 import android.app.ActivityThread;
     24 import android.app.AppGlobals;
     25 import android.app.admin.DevicePolicyManager;
     26 import android.content.Context;
     27 import android.content.Intent;
     28 import android.content.pm.IPackageManager;
     29 import android.content.pm.UserInfo;
     30 import android.os.Bundle;
     31 import android.os.Process;
     32 import android.os.RemoteException;
     33 import android.os.UserHandle;
     34 import android.os.UserManager;
     35 import android.util.Slog;
     36 import android.widget.Toast;
     37 
     38 import java.util.List;
     39 
     40 /**
     41  * This is used in conjunction with
     42  * {@link DevicePolicyManager#addCrossProfileIntentFilter} to enable intents to
     43  * be passed in and out of a managed profile.
     44  */
     45 public class IntentForwarderActivity extends Activity  {
     46 
     47     public static String TAG = "IntentForwarderActivity";
     48 
     49     public static String FORWARD_INTENT_TO_USER_OWNER
     50             = "com.android.internal.app.ForwardIntentToUserOwner";
     51 
     52     public static String FORWARD_INTENT_TO_MANAGED_PROFILE
     53             = "com.android.internal.app.ForwardIntentToManagedProfile";
     54 
     55     @Override
     56     protected void onCreate(Bundle savedInstanceState) {
     57         super.onCreate(savedInstanceState);
     58         Intent intentReceived = getIntent();
     59 
     60         String className = intentReceived.getComponent().getClassName();
     61         final UserHandle userDest;
     62         final int userMessageId;
     63 
     64         if (className.equals(FORWARD_INTENT_TO_USER_OWNER)) {
     65             userMessageId = com.android.internal.R.string.forward_intent_to_owner;
     66             userDest = UserHandle.OWNER;
     67         } else if (className.equals(FORWARD_INTENT_TO_MANAGED_PROFILE)) {
     68             userMessageId = com.android.internal.R.string.forward_intent_to_work;
     69             userDest = getManagedProfile();
     70         } else {
     71             Slog.wtf(TAG, IntentForwarderActivity.class.getName() + " cannot be called directly");
     72             userMessageId = -1;
     73             userDest = null;
     74         }
     75         if (userDest == null) { // This covers the case where there is no managed profile.
     76             finish();
     77             return;
     78         }
     79         Intent newIntent = new Intent(intentReceived);
     80         newIntent.setComponent(null);
     81         // Apps should not be allowed to target a specific package in the target user.
     82         newIntent.setPackage(null);
     83         newIntent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT
     84                 |Intent.FLAG_ACTIVITY_PREVIOUS_IS_TOP);
     85         int callingUserId = getUserId();
     86         IPackageManager ipm = AppGlobals.getPackageManager();
     87         String resolvedType = newIntent.resolveTypeIfNeeded(getContentResolver());
     88         boolean canForward = false;
     89         Intent selector = newIntent.getSelector();
     90         if (selector == null) {
     91             selector = newIntent;
     92         }
     93         try {
     94             canForward = ipm.canForwardTo(selector, resolvedType, callingUserId,
     95                     userDest.getIdentifier());
     96         } catch (RemoteException e) {
     97             Slog.e(TAG, "PackageManagerService is dead?");
     98         }
     99         if (canForward) {
    100             newIntent.setContentUserHint(callingUserId);
    101 
    102             final android.content.pm.ResolveInfo ri = getPackageManager().resolveActivityAsUser(
    103                         newIntent, MATCH_DEFAULT_ONLY, userDest.getIdentifier());
    104 
    105             // Only show a disclosure if this is a normal (non-OS) app
    106             final boolean shouldShowDisclosure =
    107                     !UserHandle.isSameApp(ri.activityInfo.applicationInfo.uid, Process.SYSTEM_UID);
    108 
    109             try {
    110                 startActivityAsCaller(newIntent, null, userDest.getIdentifier());
    111             } catch (RuntimeException e) {
    112                 int launchedFromUid = -1;
    113                 String launchedFromPackage = "?";
    114                 try {
    115                     launchedFromUid = ActivityManagerNative.getDefault().getLaunchedFromUid(
    116                             getActivityToken());
    117                     launchedFromPackage = ActivityManagerNative.getDefault().getLaunchedFromPackage(
    118                             getActivityToken());
    119                 } catch (RemoteException ignored) {
    120                 }
    121 
    122                 Slog.wtf(TAG, "Unable to launch as UID " + launchedFromUid + " package "
    123                         + launchedFromPackage + ", while running in "
    124                         + ActivityThread.currentProcessName(), e);
    125             }
    126 
    127             if (shouldShowDisclosure) {
    128                 Toast.makeText(this, getString(userMessageId), Toast.LENGTH_LONG).show();
    129             }
    130         } else {
    131             Slog.wtf(TAG, "the intent: " + newIntent + "cannot be forwarded from user "
    132                     + callingUserId + " to user " + userDest.getIdentifier());
    133         }
    134         finish();
    135     }
    136 
    137     /**
    138      * Returns the managed profile for this device or null if there is no managed
    139      * profile.
    140      *
    141      * TODO: Remove the assumption that there is only one managed profile
    142      * on the device.
    143      */
    144     private UserHandle getManagedProfile() {
    145         UserManager userManager = (UserManager) getSystemService(Context.USER_SERVICE);
    146         List<UserInfo> relatedUsers = userManager.getProfiles(UserHandle.USER_OWNER);
    147         for (UserInfo userInfo : relatedUsers) {
    148             if (userInfo.isManagedProfile()) return new UserHandle(userInfo.id);
    149         }
    150         Slog.wtf(TAG, FORWARD_INTENT_TO_MANAGED_PROFILE
    151                 + " has been called, but there is no managed profile");
    152         return null;
    153     }
    154 }
    155