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 package com.android.car.settings.accounts;
17 
18 import static android.content.Intent.EXTRA_USER;
19 
20 import android.accounts.AccountManager;
21 import android.accounts.AccountManagerCallback;
22 import android.accounts.AccountManagerFuture;
23 import android.accounts.AuthenticatorException;
24 import android.accounts.OperationCanceledException;
25 import android.app.Activity;
26 import android.app.PendingIntent;
27 import android.car.userlib.CarUserManagerHelper;
28 import android.content.ComponentName;
29 import android.content.Context;
30 import android.content.Intent;
31 import android.os.Bundle;
32 import android.os.UserHandle;
33 import android.os.UserManager;
34 import android.widget.Toast;
35 
36 import com.android.car.settings.R;
37 import com.android.car.settings.common.Logger;
38 
39 import java.io.IOException;
40 
41 /**
42  * Entry point Activity for account setup. Works as follows
43  *
44  * <ol>
45  * <li> After receiving an account type from ChooseAccountFragment, this Activity launches the
46  * account setup specified by AccountManager.
47  * <li> After the account setup, this Activity finishes without showing anything.
48  * </ol>
49  */
50 public class AddAccountActivity extends Activity {
51     /**
52      * A boolean to keep the state of whether add account has already been called.
53      */
54     private static final String KEY_ADD_CALLED = "AddAccountCalled";
55     /**
56      * Extra parameter to identify the caller. Applications may display a
57      * different UI if the call is made from Settings or from a specific
58      * application.
59      */
60     private static final String KEY_CALLER_IDENTITY = "pendingIntent";
61     private static final String SHOULD_NOT_RESOLVE = "SHOULDN'T RESOLVE!";
62 
63     private static final Logger LOG = new Logger(AddAccountActivity.class);
64     private static final String ALLOW_SKIP = "allowSkip";
65 
66     /* package */ static final String EXTRA_SELECTED_ACCOUNT = "selected_account";
67 
68     // Show additional info regarding the use of a device with multiple users
69     static final String EXTRA_HAS_MULTIPLE_USERS = "hasMultipleUsers";
70 
71     // Need a specific request code for add account activity.
72     public static final int ADD_ACCOUNT_REQUEST = 2001;
73 
74     private CarUserManagerHelper mCarUserManagerHelper;
75     private UserHandle mUserHandle;
76     private PendingIntent mPendingIntent;
77     private boolean mAddAccountCalled;
78 
79     private final AccountManagerCallback<Bundle> mCallback = new AccountManagerCallback<Bundle>() {
80         @Override
81         public void run(AccountManagerFuture<Bundle> future) {
82             if (!future.isDone()) {
83                 LOG.v("Account manager future is not done.");
84                 finish();
85             }
86             try {
87                 Bundle result = future.getResult();
88 
89                 Intent intent = (Intent) result.getParcelable(AccountManager.KEY_INTENT);
90                 Bundle addAccountOptions = new Bundle();
91                 addAccountOptions.putBoolean(EXTRA_HAS_MULTIPLE_USERS,
92                         hasMultipleUsers(AddAccountActivity.this));
93                 addAccountOptions.putParcelable(EXTRA_USER, mUserHandle);
94                 intent.putExtras(addAccountOptions);
95                 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
96                 startActivityForResultAsUser(
97                         intent, ADD_ACCOUNT_REQUEST, mUserHandle);
98                 LOG.v("account added: " + result);
99             } catch (OperationCanceledException | IOException | AuthenticatorException e) {
100                 LOG.v("addAccount error: " + e);
101             } finally {
102                 finish();
103             }
104         }
105     };
106 
107     @Override
onSaveInstanceState(Bundle outState)108     protected void onSaveInstanceState(Bundle outState) {
109         super.onSaveInstanceState(outState);
110         outState.putBoolean(KEY_ADD_CALLED, mAddAccountCalled);
111         LOG.v("saved");
112     }
113 
114     @Override
onCreate(Bundle savedInstanceState)115     public void onCreate(Bundle savedInstanceState) {
116         super.onCreate(savedInstanceState);
117         if (savedInstanceState != null) {
118             mAddAccountCalled = savedInstanceState.getBoolean(KEY_ADD_CALLED);
119             LOG.v("Restored from previous add account call: " + mAddAccountCalled);
120         }
121 
122         mCarUserManagerHelper = new CarUserManagerHelper(this);
123         mUserHandle = mCarUserManagerHelper.getCurrentProcessUserInfo().getUserHandle();
124 
125         if (mCarUserManagerHelper.isCurrentProcessUserHasRestriction(
126                 UserManager.DISALLOW_MODIFY_ACCOUNTS)) {
127             // We aren't allowed to add an account.
128             Toast.makeText(
129                     this, R.string.user_cannot_add_accounts_message, Toast.LENGTH_LONG)
130                     .show();
131             finish();
132             return;
133         }
134 
135         if (mAddAccountCalled) {
136             // We already called add account - maybe the callback was lost.
137             finish();
138             return;
139         }
140         addAccount(getIntent().getStringExtra(EXTRA_SELECTED_ACCOUNT));
141     }
142 
143     @Override
onActivityResult(int requestCode, int resultCode, Intent data)144     public void onActivityResult(int requestCode, int resultCode, Intent data) {
145         setResult(resultCode);
146         if (mPendingIntent != null) {
147             mPendingIntent.cancel();
148             mPendingIntent = null;
149         }
150         finish();
151     }
152 
addAccount(String accountType)153     private void addAccount(String accountType) {
154         Bundle addAccountOptions = new Bundle();
155         addAccountOptions.putBoolean(EXTRA_HAS_MULTIPLE_USERS, hasMultipleUsers(this));
156         addAccountOptions.putBoolean(ALLOW_SKIP, true);
157 
158         /*
159          * The identityIntent is for the purposes of establishing the identity
160          * of the caller and isn't intended for launching activities, services
161          * or broadcasts.
162          */
163         Intent identityIntent = new Intent();
164         identityIntent.setComponent(new ComponentName(SHOULD_NOT_RESOLVE, SHOULD_NOT_RESOLVE));
165         identityIntent.setAction(SHOULD_NOT_RESOLVE);
166         identityIntent.addCategory(SHOULD_NOT_RESOLVE);
167 
168         mPendingIntent = PendingIntent.getBroadcast(this, 0, identityIntent, 0);
169         addAccountOptions.putParcelable(KEY_CALLER_IDENTITY, mPendingIntent);
170 
171         AccountManager.get(this).addAccountAsUser(
172                 accountType,
173                 /* authTokenType= */ null,
174                 /* requiredFeatures= */ null,
175                 addAccountOptions,
176                 null,
177                 mCallback,
178                 /* handler= */ null,
179                 mUserHandle);
180         mAddAccountCalled = true;
181     }
182 
hasMultipleUsers(Context context)183     private boolean hasMultipleUsers(Context context) {
184         return ((UserManager) context.getSystemService(Context.USER_SERVICE))
185                 .getUsers().size() > 1;
186     }
187 }
188