AccountManager.java revision ff592dc2fa53d48e4121d9b8fd70efc19938c4a1
1/* 2 * Copyright (C) 2009 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 17package android.accounts; 18 19import android.app.Activity; 20import android.content.Intent; 21import android.content.Context; 22import android.content.IntentFilter; 23import android.content.BroadcastReceiver; 24import android.database.SQLException; 25import android.os.Bundle; 26import android.os.Handler; 27import android.os.Looper; 28import android.os.RemoteException; 29import android.os.Parcelable; 30import android.os.Build; 31import android.util.Log; 32 33import java.io.IOException; 34import java.util.concurrent.Callable; 35import java.util.concurrent.CancellationException; 36import java.util.concurrent.ExecutionException; 37import java.util.concurrent.FutureTask; 38import java.util.concurrent.TimeoutException; 39import java.util.concurrent.TimeUnit; 40import java.util.HashMap; 41import java.util.Map; 42 43import com.google.android.collect.Maps; 44 45/** 46 * This class provides access to a centralized registry of the user's 47 * online accounts. With this service, users only need to enter their 48 * credentials (username and password) once for any account, granting 49 * applications access to online resources with "one-click" approval. 50 * 51 * <p>Different online services have different ways of handling accounts and 52 * authentication, so the account manager uses pluggable <em>authenticator</em> 53 * modules for different <em>account types</em>. The authenticators (which 54 * may be written by third parties) handle the actual details of validating 55 * account credentials and storing account information. For example, Google, 56 * Facebook, and Microsoft Exchange each have their own authenticator. 57 * 58 * <p>Many servers support some notion of an <em>authentication token</em>, 59 * which can be used to authenticate a request to the server without sending 60 * the user's actual password. (Auth tokens are normally created with a 61 * separate request which does include the user's credentials.) AccountManager 62 * can generate these auth tokens for applications, so the application doesn't 63 * need to handle passwords directly. Auth tokens are normally reusable, and 64 * cached by AccountManager, but must be refreshed periodically. It's the 65 * responsibility of applications to <em>invalidate</em> auth tokens when they 66 * stop working so the AccountManager knows it needs to regenerate them. 67 * 68 * <p>Applications accessing a server normally go through these steps: 69 * 70 * <ul> 71 * <li>Get an instance of AccountManager using {@link #get(Context)}. 72 * 73 * <li>List the available accounts using {@link #getAccountsByType} or 74 * {@link #getAccountsByTypeAndFeatures}. Normally applications will only 75 * be interested in accounts with one particular <em>type</em>, which 76 * identifies the authenticator. Account <em>features</em> are used to 77 * identify particular account subtypes and capabilities. Both the account 78 * type and features are authenticator-specific strings, and must be known by 79 * the application in coordination with its preferred authenticators. 80 * 81 * <li>Select one or more of the available accounts, possibly by asking the 82 * user for their preference. If no suitable accounts are available, 83 * {@link #addAccount} may be called to prompt the user to create an 84 * account of the appropriate type. 85 * 86 * <li>Request an auth token for the selected account(s) using one of the 87 * {@link #getAuthToken} methods or related helpers. Refer to the description 88 * of each method for exact usage and error handling details. 89 * 90 * <li>Make the request using the auth token. The form of the auth token, 91 * the format of the request, and the protocol used are all specific to the 92 * service you are accessing. The application makes the request itself, using 93 * whatever network and protocol libraries are useful. 94 * 95 * <li><b>Important:</b> If the request fails with an authentication error, 96 * it could be that a cached auth token is stale and no longer honored by 97 * the server. The application must call {@link #invalidateAuthToken} to remove 98 * the token from the cache, otherwise requests will continue failing! After 99 * invalidating the auth token, immediately go back to the "Request an auth 100 * token" step above. If the process fails the second time, then it can be 101 * treated as a "genuine" authentication failure and the user notified or other 102 * appropriate actions taken. 103 * </ul> 104 * 105 * <p>Some AccountManager methods may require interaction with the user to 106 * prompt for credentials, present options, or ask the user to add an account. 107 * The caller may choose whether to allow AccountManager to directly launch the 108 * necessary user interface and wait for the user, or to return an Intent which 109 * the caller may use to launch the interface, or (in some cases) to install a 110 * notification which the user can select at any time to launch the interface. 111 * To have AccountManager launch the interface directly, the caller must supply 112 * the current foreground {@link Activity} context. 113 * 114 * <p>Many AccountManager methods take {@link AccountManagerCallback} and 115 * {@link Handler} as parameters. These methods return immediately but 116 * run asynchronously. If a callback is provided then 117 * {@link AccountManagerCallback#run} will be invoked on the Handler's 118 * thread when the request completes, successfully or not. 119 * An {@link AccountManagerFuture} is returned by these requests and also 120 * supplied to the callback (if any). The result is retrieved by calling 121 * {@link AccountManagerFuture#getResult()} which waits for the operation 122 * to complete (if necessary) and either returns the result or throws an 123 * exception if an error occurred during the operation. 124 * To make the request synchronously, call 125 * {@link AccountManagerFuture#getResult()} immediately on receiving the 126 * future from the method. No callback need be supplied. 127 * 128 * <p>Requests which may block, including 129 * {@link AccountManagerFuture#getResult()}, must never be called on 130 * the application's main event thread. These operations throw 131 * {@link IllegalStateException} if they are used on the main thread. 132 */ 133public class AccountManager { 134 private static final String TAG = "AccountManager"; 135 136 public static final int ERROR_CODE_REMOTE_EXCEPTION = 1; 137 public static final int ERROR_CODE_NETWORK_ERROR = 3; 138 public static final int ERROR_CODE_CANCELED = 4; 139 public static final int ERROR_CODE_INVALID_RESPONSE = 5; 140 public static final int ERROR_CODE_UNSUPPORTED_OPERATION = 6; 141 public static final int ERROR_CODE_BAD_ARGUMENTS = 7; 142 public static final int ERROR_CODE_BAD_REQUEST = 8; 143 144 /** 145 * The Bundle key used for the {@link String} account name in results 146 * from methods which return information about a particular account. 147 */ 148 public static final String KEY_ACCOUNT_NAME = "authAccount"; 149 150 /** 151 * The Bundle key used for the {@link String} account type in results 152 * from methods which return information about a particular account. 153 */ 154 public static final String KEY_ACCOUNT_TYPE = "accountType"; 155 156 /** 157 * The Bundle key used for the auth token value in results 158 * from {@link #getAuthToken} and friends. 159 */ 160 public static final String KEY_AUTHTOKEN = "authtoken"; 161 162 /** 163 * The Bundle key used for an {@link Intent} in results from methods that 164 * may require the caller to interact with the user. The Intent can 165 * be used to start the corresponding user interface activity. 166 */ 167 public static final String KEY_INTENT = "intent"; 168 169 /** 170 * The Bundle key used to supply the password directly in options to 171 * {@link #confirmCredentials}, rather than prompting the user with 172 * the standard password prompt. 173 */ 174 public static final String KEY_PASSWORD = "password"; 175 176 public static final String KEY_ACCOUNTS = "accounts"; 177 public static final String KEY_ACCOUNT_AUTHENTICATOR_RESPONSE = "accountAuthenticatorResponse"; 178 public static final String KEY_ACCOUNT_MANAGER_RESPONSE = "accountManagerResponse"; 179 public static final String KEY_AUTHENTICATOR_TYPES = "authenticator_types"; 180 public static final String KEY_AUTH_FAILED_MESSAGE = "authFailedMessage"; 181 public static final String KEY_AUTH_TOKEN_LABEL = "authTokenLabelKey"; 182 public static final String KEY_BOOLEAN_RESULT = "booleanResult"; 183 public static final String KEY_ERROR_CODE = "errorCode"; 184 public static final String KEY_ERROR_MESSAGE = "errorMessage"; 185 public static final String KEY_USERDATA = "userdata"; 186 187 public static final String ACTION_AUTHENTICATOR_INTENT = 188 "android.accounts.AccountAuthenticator"; 189 public static final String AUTHENTICATOR_META_DATA_NAME = 190 "android.accounts.AccountAuthenticator"; 191 public static final String AUTHENTICATOR_ATTRIBUTES_NAME = "account-authenticator"; 192 193 private final Context mContext; 194 private final IAccountManager mService; 195 private final Handler mMainHandler; 196 197 /** 198 * Action sent as a broadcast Intent by the AccountsService 199 * when accounts are added, accounts are removed, or an 200 * account's credentials (saved password, etc) are changed. 201 * 202 * @see #addOnAccountsUpdatedListener 203 */ 204 public static final String LOGIN_ACCOUNTS_CHANGED_ACTION = 205 "android.accounts.LOGIN_ACCOUNTS_CHANGED"; 206 207 /** 208 * @hide 209 */ 210 public AccountManager(Context context, IAccountManager service) { 211 mContext = context; 212 mService = service; 213 mMainHandler = new Handler(mContext.getMainLooper()); 214 } 215 216 /** 217 * @hide used for testing only 218 */ 219 public AccountManager(Context context, IAccountManager service, Handler handler) { 220 mContext = context; 221 mService = service; 222 mMainHandler = handler; 223 } 224 225 /** 226 * Gets an AccountManager instance associated with a Context. 227 * The {@link Context} will be used as long as the AccountManager is 228 * active, so make sure to use a {@link Context} whose lifetime is 229 * commensurate with any listeners registered to 230 * {@link #addOnAccountsUpdatedListener} or similar methods. 231 * 232 * <p>It is safe to call this method from the main thread. 233 * 234 * <p>No permission is required to call this method. 235 * 236 * @param context The {@link Context} to use when necessary 237 * @return An {@link AccountManager} instance 238 */ 239 public static AccountManager get(Context context) { 240 return (AccountManager) context.getSystemService(Context.ACCOUNT_SERVICE); 241 } 242 243 /** 244 * Gets the saved password associated with the account. 245 * This is intended for authenticators and related code; applications 246 * should get an auth token instead. 247 * 248 * <p>It is safe to call this method from the main thread. 249 * 250 * <p>This method requires the caller to hold the permission 251 * {@link android.Manifest.permission#AUTHENTICATE_ACCOUNTS} 252 * and to have the same UID as the account's authenticator. 253 * 254 * @param account The account to query for a password 255 * @return The account's password, null if none or if the account doesn't exist 256 */ 257 public String getPassword(final Account account) { 258 try { 259 return mService.getPassword(account); 260 } catch (RemoteException e) { 261 // will never happen 262 throw new RuntimeException(e); 263 } 264 } 265 266 /** 267 * Gets the user data named by "key" associated with the account. 268 * This is intended for authenticators and related code to store 269 * arbitrary metadata along with accounts. The meaning of the keys 270 * and values is up to the authenticator for the account. 271 * 272 * <p>It is safe to call this method from the main thread. 273 * 274 * <p>This method requires the caller to hold the permission 275 * {@link android.Manifest.permission#AUTHENTICATE_ACCOUNTS} 276 * and to have the same UID as the account's authenticator. 277 * 278 * @param account The account to query for user data 279 * @return The user data, null if the account or key doesn't exist 280 */ 281 public String getUserData(final Account account, final String key) { 282 try { 283 return mService.getUserData(account, key); 284 } catch (RemoteException e) { 285 // will never happen 286 throw new RuntimeException(e); 287 } 288 } 289 290 /** 291 * Lists the currently registered authenticators. 292 * 293 * <p>It is safe to call this method from the main thread. 294 * 295 * <p>No permission is required to call this method. 296 * 297 * @return An array of {@link AuthenticatorDescription} for every 298 * authenticator known to the AccountManager service. Empty (never 299 * null) if no authenticators are known. 300 */ 301 public AuthenticatorDescription[] getAuthenticatorTypes() { 302 try { 303 return mService.getAuthenticatorTypes(); 304 } catch (RemoteException e) { 305 // will never happen 306 throw new RuntimeException(e); 307 } 308 } 309 310 /** 311 * Lists all accounts of any type registered on the device. 312 * Equivalent to getAccountsByType(null). 313 * 314 * <p>It is safe to call this method from the main thread. 315 * 316 * <p>This method requires the caller to hold the permission 317 * {@link android.Manifest.permission#GET_ACCOUNTS}. 318 * 319 * @return An array of {@link Account}, one for each account. Empty 320 * (never null) if no accounts have been added. 321 */ 322 public Account[] getAccounts() { 323 try { 324 return mService.getAccounts(null); 325 } catch (RemoteException e) { 326 // won't ever happen 327 throw new RuntimeException(e); 328 } 329 } 330 331 /** 332 * Lists all accounts of a particular type. The account type is a 333 * string token corresponding to the authenticator and useful domain 334 * of the account. For example, there are types corresponding to Google 335 * and Facebook. The exact string token to use will be published somewhere 336 * associated with the authenticator in question. 337 * 338 * <p>It is safe to call this method from the main thread. 339 * 340 * <p>This method requires the caller to hold the permission 341 * {@link android.Manifest.permission#GET_ACCOUNTS}. 342 * 343 * @param type The type of accounts to return, null to retrieve all accounts 344 * @return An array of {@link Account}, one per matching account. Empty 345 * (never null) if no accounts of the specified type have been added. 346 */ 347 public Account[] getAccountsByType(String type) { 348 try { 349 return mService.getAccounts(type); 350 } catch (RemoteException e) { 351 // won't ever happen 352 throw new RuntimeException(e); 353 } 354 } 355 356 /** 357 * Finds out whether a particular account has all the specified features. 358 * Account features are authenticator-specific string tokens identifying 359 * boolean account properties. For example, features are used to tell 360 * whether Google accounts have a particular service (such as Google 361 * Calendar or Google Talk) enabled. The feature names and their meanings 362 * are published somewhere associated with the authenticator in question. 363 * 364 * <p>This method may be called from any thread, but the returned 365 * {@link AccountManagerFuture} must not be used on the main thread. 366 * 367 * <p>This method requires the caller to hold the permission 368 * {@link android.Manifest.permission#GET_ACCOUNTS}. 369 * 370 * @param account The {@link Account} to test 371 * @param features An array of the account features to check 372 * @param callback Callback to invoke when the request completes, 373 * null for no callback 374 * @param handler {@link Handler} identifying the callback thread, 375 * null for the main thread 376 * @return An {@link AccountManagerFuture} which resolves to a Boolean, 377 * true if the account exists and has all of the specified features. 378 */ 379 public AccountManagerFuture<Boolean> hasFeatures(final Account account, 380 final String[] features, 381 AccountManagerCallback<Boolean> callback, Handler handler) { 382 return new Future2Task<Boolean>(handler, callback) { 383 public void doWork() throws RemoteException { 384 mService.hasFeatures(mResponse, account, features); 385 } 386 public Boolean bundleToResult(Bundle bundle) throws AuthenticatorException { 387 if (!bundle.containsKey(KEY_BOOLEAN_RESULT)) { 388 throw new AuthenticatorException("no result in response"); 389 } 390 return bundle.getBoolean(KEY_BOOLEAN_RESULT); 391 } 392 }.start(); 393 } 394 395 /** 396 * Lists all accounts of a type which have certain features. The account 397 * type identifies the authenticator (see {@link #getAccountsByType}). 398 * Account features are authenticator-specific string tokens identifying 399 * boolean account properties (see {@link #hasFeatures}). 400 * 401 * <p>Unlike {@link #getAccountsByType}, this method calls the authenticator, 402 * which may contact the server or do other work to check account features, 403 * so the method returns an {@link AccountManagerFuture}. 404 * 405 * <p>This method may be called from any thread, but the returned 406 * {@link AccountManagerFuture} must not be used on the main thread. 407 * 408 * <p>This method requires the caller to hold the permission 409 * {@link android.Manifest.permission#GET_ACCOUNTS}. 410 * 411 * @param type The type of accounts to return, must not be null 412 * @param features An array of the account features to require, 413 * may be null or empty 414 * @param callback Callback to invoke when the request completes, 415 * null for no callback 416 * @param handler {@link Handler} identifying the callback thread, 417 * null for the main thread 418 * @return An {@link AccountManagerFuture} which resolves to an array of 419 * {@link Account}, one per account of the specified type which 420 * matches the requested features. 421 */ 422 public AccountManagerFuture<Account[]> getAccountsByTypeAndFeatures( 423 final String type, final String[] features, 424 AccountManagerCallback<Account[]> callback, Handler handler) { 425 return new Future2Task<Account[]>(handler, callback) { 426 public void doWork() throws RemoteException { 427 if (type == null) { 428 Log.e(TAG, "Type is null"); 429 set(new Account[0]); 430 return; 431 } 432 mService.getAccountsByFeatures(mResponse, type, features); 433 } 434 public Account[] bundleToResult(Bundle bundle) throws AuthenticatorException { 435 if (!bundle.containsKey(KEY_ACCOUNTS)) { 436 throw new AuthenticatorException("no result in response"); 437 } 438 final Parcelable[] parcelables = bundle.getParcelableArray(KEY_ACCOUNTS); 439 Account[] descs = new Account[parcelables.length]; 440 for (int i = 0; i < parcelables.length; i++) { 441 descs[i] = (Account) parcelables[i]; 442 } 443 return descs; 444 } 445 }.start(); 446 } 447 448 /** 449 * Adds an account directly to the AccountManager. Normally used by sign-up 450 * wizards associated with authenticators, not directly by applications. 451 * 452 * <p>It is safe to call this method from the main thread. 453 * 454 * <p>This method requires the caller to hold the permission 455 * {@link android.Manifest.permission#AUTHENTICATE_ACCOUNTS} 456 * and to have the same UID as the added account's authenticator. 457 * 458 * @param account The {@link Account} to add 459 * @param password The password to associate with the account, null for none 460 * @param userdata String values to use for the account's userdata, null for none 461 * @return Whether the account was successfully added. False if the account 462 * already exists, the account is null, or another error occurs. 463 */ 464 public boolean addAccountExplicitly(Account account, String password, Bundle userdata) { 465 try { 466 return mService.addAccount(account, password, userdata); 467 } catch (RemoteException e) { 468 // won't ever happen 469 throw new RuntimeException(e); 470 } 471 } 472 473 /** 474 * Removes an account from the AccountManager. Does nothing if the account 475 * does not exist. Does not delete the account from the server. 476 * The authenticator may have its own policies preventing account 477 * deletion, in which case the account will not be deleted. 478 * 479 * <p>This method may be called from any thread, but the returned 480 * {@link AccountManagerFuture} must not be used on the main thread. 481 * 482 * <p>This method requires the caller to hold the permission 483 * {@link android.Manifest.permission#MANAGE_ACCOUNTS}. 484 * 485 * @param account The {@link Account} to remove 486 * @param callback Callback to invoke when the request completes, 487 * null for no callback 488 * @param handler {@link Handler} identifying the callback thread, 489 * null for the main thread 490 * @return An {@link AccountManagerFuture} which resolves to a Boolean, 491 * true if the account has been successfully removed, 492 * false if the authenticator forbids deleting this account. 493 */ 494 public AccountManagerFuture<Boolean> removeAccount(final Account account, 495 AccountManagerCallback<Boolean> callback, Handler handler) { 496 return new Future2Task<Boolean>(handler, callback) { 497 public void doWork() throws RemoteException { 498 mService.removeAccount(mResponse, account); 499 } 500 public Boolean bundleToResult(Bundle bundle) throws AuthenticatorException { 501 if (!bundle.containsKey(KEY_BOOLEAN_RESULT)) { 502 throw new AuthenticatorException("no result in response"); 503 } 504 return bundle.getBoolean(KEY_BOOLEAN_RESULT); 505 } 506 }.start(); 507 } 508 509 /** 510 * Removes an auth token from the AccountManager's cache. Does nothing if 511 * the auth token is not currently in the cache. Applications must call this 512 * method when the auth token is found to have expired or otherwise become 513 * invalid for authenticating requests. The AccountManager does not validate 514 * or expire cached auth tokens otherwise. 515 * 516 * <p>It is safe to call this method from the main thread. 517 * 518 * <p>This method requires the caller to hold the permission 519 * {@link android.Manifest.permission#MANAGE_ACCOUNTS}. 520 * 521 * @param accountType The account type of the auth token to invalidate 522 * @param authToken The auth token to invalidate 523 */ 524 public void invalidateAuthToken(final String accountType, final String authToken) { 525 try { 526 mService.invalidateAuthToken(accountType, authToken); 527 } catch (RemoteException e) { 528 // won't ever happen 529 throw new RuntimeException(e); 530 } 531 } 532 533 /** 534 * Gets an auth token from the AccountManager's cache. If no auth 535 * token is cached for this account, null will be returned -- a new 536 * auth token will not be generated, and the server will not be contacted. 537 * Intended for use by the authenticator, not directly by applications. 538 * 539 * <p>It is safe to call this method from the main thread. 540 * 541 * <p>This method requires the caller to hold the permission 542 * {@link android.Manifest.permission#AUTHENTICATE_ACCOUNTS} 543 * and to have the same UID as the account's authenticator. 544 * 545 * @param account The account to fetch an auth token for 546 * @param authTokenType The type of auth token to fetch, see {#getAuthToken} 547 * @return The cached auth token for this account and type, or null if 548 * no auth token is cached or the account does not exist. 549 */ 550 public String peekAuthToken(final Account account, final String authTokenType) { 551 if (account == null) { 552 Log.e(TAG, "peekAuthToken: the account must not be null"); 553 return null; 554 } 555 if (authTokenType == null) { 556 return null; 557 } 558 try { 559 return mService.peekAuthToken(account, authTokenType); 560 } catch (RemoteException e) { 561 // won't ever happen 562 throw new RuntimeException(e); 563 } 564 } 565 566 /** 567 * Sets or forgets a saved password. This modifies the local copy of the 568 * password used to automatically authenticate the user; it does 569 * not change the user's account password on the server. Intended for use 570 * by the authenticator, not directly by applications. 571 * 572 * <p>It is safe to call this method from the main thread. 573 * 574 * <p>This method requires the caller to hold the permission 575 * {@link android.Manifest.permission#AUTHENTICATE_ACCOUNTS} 576 * and have the same UID as the account's authenticator. 577 * 578 * @param account The account to set a password for 579 * @param password The password to set, null to clear the password 580 */ 581 public void setPassword(final Account account, final String password) { 582 if (account == null) { 583 Log.e(TAG, "the account must not be null"); 584 return; 585 } 586 try { 587 mService.setPassword(account, password); 588 } catch (RemoteException e) { 589 // won't ever happen 590 throw new RuntimeException(e); 591 } 592 } 593 594 /** 595 * Forgets a saved password. This erases the local copy of the password; 596 * it does not change the user's account password on the server. 597 * Has the same effect as setPassword(account, null) but requires fewer 598 * permissions, and may be used by applications or management interfaces 599 * to "sign out" from an account. 600 * 601 * <p>It is safe to call this method from the main thread. 602 * 603 * <p>This method requires the caller to hold the permission 604 * {@link android.Manifest.permission#MANAGE_ACCOUNTS} 605 * 606 * @param account The account whose password to clear 607 */ 608 public void clearPassword(final Account account) { 609 if (account == null) { 610 Log.e(TAG, "the account must not be null"); 611 return; 612 } 613 try { 614 mService.clearPassword(account); 615 } catch (RemoteException e) { 616 // won't ever happen 617 throw new RuntimeException(e); 618 } 619 } 620 621 /** 622 * Sets one userdata key for an account. Intended by use for the 623 * authenticator to stash state for itself, not directly by applications. 624 * The meaning of the keys and values is up to the authenticator. 625 * 626 * <p>It is safe to call this method from the main thread. 627 * 628 * <p>This method requires the caller to hold the permission 629 * {@link android.Manifest.permission#AUTHENTICATE_ACCOUNTS} 630 * and to have the same UID as the account's authenticator. 631 * 632 * @param account The account to set the userdata for 633 * @param key The userdata key to set. Must not be null 634 * @param value The value to set, null to clear this userdata key 635 */ 636 public void setUserData(final Account account, final String key, final String value) { 637 if (account == null) { 638 Log.e(TAG, "the account must not be null"); 639 return; 640 } 641 if (key == null) { 642 Log.e(TAG, "the key must not be null"); 643 return; 644 } 645 try { 646 mService.setUserData(account, key, value); 647 } catch (RemoteException e) { 648 // won't ever happen 649 throw new RuntimeException(e); 650 } 651 } 652 653 /** 654 * Adds an auth token to the AccountManager cache for an account. 655 * If the account does not exist then this call has no effect. 656 * Replaces any previous auth token for this account and auth token type. 657 * Intended for use by the authenticator, not directly by applications. 658 * 659 * <p>It is safe to call this method from the main thread. 660 * 661 * <p>This method requires the caller to hold the permission 662 * {@link android.Manifest.permission#AUTHENTICATE_ACCOUNTS} 663 * and to have the same UID as the account's authenticator. 664 * 665 * @param account The account to set an auth token for 666 * @param authTokenType The type of the auth token, see {#getAuthToken} 667 * @param authToken The auth token to add to the cache 668 */ 669 public void setAuthToken(Account account, final String authTokenType, final String authToken) { 670 try { 671 mService.setAuthToken(account, authTokenType, authToken); 672 } catch (RemoteException e) { 673 // won't ever happen 674 throw new RuntimeException(e); 675 } 676 } 677 678 /** 679 * This convenience helper synchronously gets an auth token with 680 * {@link #getAuthToken(Account, String, boolean, AccountManagerCallback, Handler)}. 681 * 682 * <p>This method may block while a network request completes, and must 683 * never be made from the main thread. 684 * 685 * <p>This method requires the caller to hold the permission 686 * {@link android.Manifest.permission#USE_CREDENTIALS}. 687 * 688 * @param account The account to fetch an auth token for 689 * @param authTokenType The auth token type, see {#link getAuthToken} 690 * @param notifyAuthFailure If true, display a notification and return null 691 * if authentication fails; if false, prompt and wait for the user to 692 * re-enter correct credentials before returning 693 * @return An auth token of the specified type for this account, or null 694 * if authentication fails or none can be fetched. 695 * @throws AuthenticatorException if the authenticator failed to respond 696 * @throws OperationCanceledException if the request was canceled for any 697 * reason, including the user canceling a credential request 698 * @throws java.io.IOException if the authenticator experienced an I/O problem 699 * creating a new auth token, usually because of network trouble 700 */ 701 public String blockingGetAuthToken(Account account, String authTokenType, 702 boolean notifyAuthFailure) 703 throws OperationCanceledException, IOException, AuthenticatorException { 704 Bundle bundle = getAuthToken(account, authTokenType, notifyAuthFailure, null /* callback */, 705 null /* handler */).getResult(); 706 return bundle.getString(KEY_AUTHTOKEN); 707 } 708 709 /** 710 * Gets an auth token of the specified type for a particular account, 711 * prompting the user for credentials if necessary. This method is 712 * intended for applications running in the foreground where it makes 713 * sense to ask the user directly for a password. 714 * 715 * <p>If a previously generated auth token is cached for this account and 716 * type, then it will be returned. Otherwise, if we have a saved password 717 * the server accepts, it will be used to generate a new auth token. 718 * Otherwise, the user will be asked for a password, which will be sent to 719 * the server to generate a new auth token. 720 * 721 * <p>The value of the auth token type depends on the authenticator. 722 * Some services use different tokens to access different functionality -- 723 * for example, Google uses different auth tokens to access Gmail and 724 * Google Calendar for the same account. 725 * 726 * <p>This method may be called from any thread, but the returned 727 * {@link AccountManagerFuture} must not be used on the main thread. 728 * 729 * <p>This method requires the caller to hold the permission 730 * {@link android.Manifest.permission#USE_CREDENTIALS}. 731 * 732 * @param account The account to fetch an auth token for 733 * @param authTokenType The auth token type, an authenticator-dependent 734 * string token, must not be null 735 * @param options Authenticator-specific options for the request, 736 * may be null or empty 737 * @param activity The {@link Activity} context to use for launching a new 738 * authenticator-defined sub-Activity to prompt the user for a password 739 * if necessary; used only to call startActivity(); must not be null. 740 * @param callback Callback to invoke when the request completes, 741 * null for no callback 742 * @param handler {@link Handler} identifying the callback thread, 743 * null for the main thread 744 * @return An {@link AccountManagerFuture} which resolves to a Bundle with 745 * at least the following fields: 746 * <ul> 747 * <li> {@link #KEY_ACCOUNT_NAME} - the name of the account you supplied 748 * <li> {@link #KEY_ACCOUNT_TYPE} - the type of the account 749 * <li> {@link #KEY_AUTHTOKEN} - the auth token you wanted 750 * </ul> 751 * 752 * (Other authenticator-specific values may be returned.) If an auth token 753 * could not be fetched, {@link AccountManagerFuture#getResult()} throws: 754 * <ul> 755 * <li> {@link AuthenticatorException} if the authenticator failed to respond 756 * <li> {@link OperationCanceledException} if the operation is canceled for 757 * any reason, incluidng the user canceling a credential request 758 * <li> {@link IOException} if the authenticator experienced an I/O problem 759 * creating a new auth token, usually because of network trouble 760 * </ul> 761 */ 762 public AccountManagerFuture<Bundle> getAuthToken( 763 final Account account, final String authTokenType, final Bundle options, 764 final Activity activity, AccountManagerCallback<Bundle> callback, Handler handler) { 765 if (activity == null) throw new IllegalArgumentException("activity is null"); 766 if (authTokenType == null) throw new IllegalArgumentException("authTokenType is null"); 767 return new AmsTask(activity, handler, callback) { 768 public void doWork() throws RemoteException { 769 mService.getAuthToken(mResponse, account, authTokenType, 770 false /* notifyOnAuthFailure */, true /* expectActivityLaunch */, 771 options); 772 } 773 }.start(); 774 } 775 776 /** 777 * Gets an auth token of the specified type for a particular account, 778 * optionally raising a notification if the user must enter credentials. 779 * This method is intended for background tasks and services where the 780 * user should not be immediately interrupted with a password prompt. 781 * 782 * <p>If a previously generated auth token is cached for this account and 783 * type, then it will be returned. Otherwise, if we have saved credentials 784 * the server accepts, it will be used to generate a new auth token. 785 * Otherwise, an Intent will be returned which, when started, will prompt 786 * the user for a password. If the notifyAuthFailure parameter is set, 787 * the same Intent will be associated with a status bar notification, 788 * alerting the user that they need to enter a password at some point. 789 * 790 * <p>If the intent is left in a notification, you will need to wait until 791 * the user gets around to entering a password before trying again, 792 * which could be hours or days or never. When it does happen, the 793 * account manager will broadcast the {@link #LOGIN_ACCOUNTS_CHANGED_ACTION} 794 * {@link Intent}, which applications can use to trigger another attempt 795 * to fetch an auth token. 796 * 797 * <p>If notifications are not enabled, it is the application's 798 * responsibility to launch the returned intent at some point to let 799 * the user enter credentials. In either case, the result from this 800 * call will not wait for user action. 801 * 802 * <p>The value of the auth token type depends on the authenticator. 803 * Some services use different tokens to access different functionality -- 804 * for example, Google uses different auth tokens to access Gmail and 805 * Google Calendar for the same account. 806 * 807 * <p>This method may be called from any thread, but the returned 808 * {@link AccountManagerFuture} must not be used on the main thread. 809 * 810 * <p>This method requires the caller to hold the permission 811 * {@link android.Manifest.permission#USE_CREDENTIALS}. 812 * 813 * @param account The account to fetch an auth token for 814 * @param authTokenType The auth token type, an authenticator-dependent 815 * string token, must not be null 816 * @param notifyAuthFailure True to add a notification to prompt the 817 * user for a password if necessary, false to leave that to the caller 818 * @param callback Callback to invoke when the request completes, 819 * null for no callback 820 * @param handler {@link Handler} identifying the callback thread, 821 * null for the main thread 822 * @return An {@link AccountManagerFuture} which resolves to a Bundle with 823 * at least the following fields on success: 824 * <ul> 825 * <li> {@link #KEY_ACCOUNT_NAME} - the name of the account you supplied 826 * <li> {@link #KEY_ACCOUNT_TYPE} - the type of the account 827 * <li> {@link #KEY_AUTHTOKEN} - the auth token you wanted 828 * </ul> 829 * 830 * (Other authenticator-specific values may be returned.) If the user 831 * must enter credentials, the returned Bundle contains only 832 * {@link #KEY_INTENT} with the {@link Intent} needed to launch a prompt. 833 * 834 * <p>If an error occurred, {@link AccountManagerFuture#getResult()} throws: 835 * <ul> 836 * <li> {@link AuthenticatorException} if the authenticator failed to respond 837 * <li> {@link OperationCanceledException} if the operation is canceled for 838 * any reason, incluidng the user canceling a credential request 839 * <li> {@link IOException} if the authenticator experienced an I/O problem 840 * creating a new auth token, usually because of network trouble 841 * </ul> 842 */ 843 public AccountManagerFuture<Bundle> getAuthToken( 844 final Account account, final String authTokenType, final boolean notifyAuthFailure, 845 AccountManagerCallback<Bundle> callback, Handler handler) { 846 if (account == null) throw new IllegalArgumentException("account is null"); 847 if (authTokenType == null) throw new IllegalArgumentException("authTokenType is null"); 848 return new AmsTask(null, handler, callback) { 849 public void doWork() throws RemoteException { 850 mService.getAuthToken(mResponse, account, authTokenType, 851 notifyAuthFailure, false /* expectActivityLaunch */, null /* options */); 852 } 853 }.start(); 854 } 855 856 /** 857 * Asks the user to add an account of a specified type. The authenticator 858 * for this account type processes this request with the appropriate user 859 * interface. If the user does elect to create a new account, the account 860 * name is returned. 861 * 862 * <p>This method may be called from any thread, but the returned 863 * {@link AccountManagerFuture} must not be used on the main thread. 864 * 865 * <p>This method requires the caller to hold the permission 866 * {@link android.Manifest.permission#MANAGE_ACCOUNTS}. 867 * 868 * @param accountType The type of account to add; must not be null 869 * @param authTokenType The type of auth token (see {@link #getAuthToken}) 870 * this account will need to be able to generate, null for none 871 * @param requiredFeatures The features (see {@link #hasFeatures}) this 872 * account must have, null for none 873 * @param addAccountOptions Authenticator-specific options for the request, 874 * may be null or empty 875 * @param activity The {@link Activity} context to use for launching a new 876 * authenticator-defined sub-Activity to prompt the user to create an 877 * account; used only to call startActivity(); if null, the prompt 878 * will not be launched directly, but the necessary {@link Intent} 879 * will be returned to the caller instead 880 * @param callback Callback to invoke when the request completes, 881 * null for no callback 882 * @param handler {@link Handler} identifying the callback thread, 883 * null for the main thread 884 * @return An {@link AccountManagerFuture} which resolves to a Bundle with 885 * these fields if activity was specified and an account was created: 886 * <ul> 887 * <li> {@link #KEY_ACCOUNT_NAME} - the name of the account created 888 * <li> {@link #KEY_ACCOUNT_TYPE} - the type of the account 889 * </ul> 890 * 891 * If no activity was specified, the returned Bundle contains only 892 * {@link #KEY_INTENT} with the {@link Intent} needed to launch the 893 * actual account creation process. 894 * 895 * <p>If an error occurred, {@link AccountManagerFuture#getResult()} throws: 896 * <ul> 897 * <li> {@link AuthenticatorException} if no authenticator was registered for 898 * this account type or the authenticator failed to respond 899 * <li> {@link OperationCanceledException} if the operation was canceled for 900 * any reason, including the user canceling the creation process 901 * <li> {@link IOException} if the authenticator experienced an I/O problem 902 * creating a new account, usually because of network trouble 903 * </ul> 904 */ 905 public AccountManagerFuture<Bundle> addAccount(final String accountType, 906 final String authTokenType, final String[] requiredFeatures, 907 final Bundle addAccountOptions, 908 final Activity activity, AccountManagerCallback<Bundle> callback, Handler handler) { 909 return new AmsTask(activity, handler, callback) { 910 public void doWork() throws RemoteException { 911 if (accountType == null) { 912 Log.e(TAG, "the account must not be null"); 913 // to unblock caller waiting on Future.get() 914 set(new Bundle()); 915 return; 916 } 917 mService.addAcount(mResponse, accountType, authTokenType, 918 requiredFeatures, activity != null, addAccountOptions); 919 } 920 }.start(); 921 } 922 923 /** 924 * Confirms that the user knows the password for an account to make extra 925 * sure they are the owner of the account. The user-entered password can 926 * be supplied directly, otherwise the authenticator for this account type 927 * prompts the user with the appropriate interface. This method is 928 * intended for applications which want extra assurance; for example, the 929 * phone lock screen uses this to let the user unlock the phone with an 930 * account password if they forget the lock pattern. 931 * 932 * <p>If the user-entered password matches a saved password for this 933 * account, the request is considered valid; otherwise the authenticator 934 * verifies the password (usually by contacting the server). 935 * 936 * <p>This method may be called from any thread, but the returned 937 * {@link AccountManagerFuture} must not be used on the main thread. 938 * 939 * <p>This method requires the caller to hold the permission 940 * {@link android.Manifest.permission#MANAGE_ACCOUNTS}. 941 * 942 * @param account The account to confirm password knowledge for 943 * @param options Authenticator-specific options for the request; 944 * if the {@link #KEY_PASSWORD} string field is present, the 945 * authenticator may use it directly rather than prompting the user; 946 * may be null or empty 947 * @param activity The {@link Activity} context to use for launching a new 948 * authenticator-defined sub-Activity to prompt the user to enter a 949 * password; used only to call startActivity(); if null, the prompt 950 * will not be launched directly, but the necessary {@link Intent} 951 * will be returned to the caller instead 952 * @param callback Callback to invoke when the request completes, 953 * null for no callback 954 * @param handler {@link Handler} identifying the callback thread, 955 * null for the main thread 956 * @return An {@link AccountManagerFuture} which resolves to a Bundle 957 * with these fields if activity or password was supplied and 958 * the account was successfully verified: 959 * <ul> 960 * <li> {@link #KEY_ACCOUNT_NAME} - the name of the account created 961 * <li> {@link #KEY_ACCOUNT_TYPE} - the type of the account 962 * <li> {@link #KEY_BOOLEAN_RESULT} - true to indicate success 963 * </ul> 964 * 965 * If no activity or password was specified, the returned Bundle contains 966 * only {@link #KEY_INTENT} with the {@link Intent} needed to launch the 967 * password prompt. 968 * 969 * <p>If an error occurred, {@link AccountManagerFuture#getResult()} throws: 970 * <ul> 971 * <li> {@link AuthenticatorException} if the authenticator failed to respond 972 * <li> {@link OperationCanceledException} if the operation was canceled for 973 * any reason, including the user canceling the password prompt 974 * <li> {@link IOException} if the authenticator experienced an I/O problem 975 * verifying the password, usually because of network trouble 976 * </ul> 977 */ 978 public AccountManagerFuture<Bundle> confirmCredentials(final Account account, 979 final Bundle options, 980 final Activity activity, 981 final AccountManagerCallback<Bundle> callback, 982 final Handler handler) { 983 return new AmsTask(activity, handler, callback) { 984 public void doWork() throws RemoteException { 985 mService.confirmCredentials(mResponse, account, options, activity != null); 986 } 987 }.start(); 988 } 989 990 /** 991 * Asks the user to enter a new password for an account, updating the 992 * saved credentials for the account. Normally this happens automatically 993 * when the server rejects credentials during an auth token fetch, but this 994 * can be invoked directly to ensure we have the correct credentials stored. 995 * 996 * <p>This method may be called from any thread, but the returned 997 * {@link AccountManagerFuture} must not be used on the main thread. 998 * 999 * <p>This method requires the caller to hold the permission 1000 * {@link android.Manifest.permission#MANAGE_ACCOUNTS}. 1001 * 1002 * @param account The account to update credentials for 1003 * @param authTokenType The credentials entered must allow an auth token 1004 * of this type to be created (but no actual auth token is returned); 1005 * may be null 1006 * @param options Authenticator-specific options for the request; 1007 * may be null or empty 1008 * @param activity The {@link Activity} context to use for launching a new 1009 * authenticator-defined sub-Activity to prompt the user to enter a 1010 * password; used only to call startActivity(); if null, the prompt 1011 * will not be launched directly, but the necessary {@link Intent} 1012 * will be returned to the caller instead 1013 * @param callback Callback to invoke when the request completes, 1014 * null for no callback 1015 * @param handler {@link Handler} identifying the callback thread, 1016 * null for the main thread 1017 * @return An {@link AccountManagerFuture} which resolves to a Bundle 1018 * with these fields if an activity was supplied and the account 1019 * credentials were successfully updated: 1020 * <ul> 1021 * <li> {@link #KEY_ACCOUNT_NAME} - the name of the account created 1022 * <li> {@link #KEY_ACCOUNT_TYPE} - the type of the account 1023 * </ul> 1024 * 1025 * If no activity was specified, the returned Bundle contains only 1026 * {@link #KEY_INTENT} with the {@link Intent} needed to launch the 1027 * password prompt. 1028 * 1029 * <p>If an error occurred, {@link AccountManagerFuture#getResult()} throws: 1030 * <ul> 1031 * <li> {@link AuthenticatorException} if the authenticator failed to respond 1032 * <li> {@link OperationCanceledException} if the operation was canceled for 1033 * any reason, including the user canceling the password prompt 1034 * <li> {@link IOException} if the authenticator experienced an I/O problem 1035 * verifying the password, usually because of network trouble 1036 * </ul> 1037 */ 1038 public AccountManagerFuture<Bundle> updateCredentials(final Account account, 1039 final String authTokenType, 1040 final Bundle options, final Activity activity, 1041 final AccountManagerCallback<Bundle> callback, 1042 final Handler handler) { 1043 return new AmsTask(activity, handler, callback) { 1044 public void doWork() throws RemoteException { 1045 mService.updateCredentials(mResponse, account, authTokenType, activity != null, 1046 options); 1047 } 1048 }.start(); 1049 } 1050 1051 /** 1052 * Offers the user an opportunity to change an authenticator's settings. 1053 * These properties are for the authenticator in general, not a particular 1054 * account. Not all authenticators support this method. 1055 * 1056 * <p>This method may be called from any thread, but the returned 1057 * {@link AccountManagerFuture} must not be used on the main thread. 1058 * 1059 * <p>This method requires the caller to hold the permission 1060 * {@link android.Manifest.permission#MANAGE_ACCOUNTS}. 1061 * 1062 * @param accountType The account type associated with the authenticator 1063 * to adjust 1064 * @param activity The {@link Activity} context to use for launching a new 1065 * authenticator-defined sub-Activity to adjust authenticator settings; 1066 * used only to call startActivity(); if null, the settings dialog will 1067 * not be launched directly, but the necessary {@link Intent} will be 1068 * returned to the caller instead 1069 * @param callback Callback to invoke when the request completes, 1070 * null for no callback 1071 * @param handler {@link Handler} identifying the callback thread, 1072 * null for the main thread 1073 * @return An {@link AccountManagerFuture} which resolves to a Bundle 1074 * which is empty if properties were edited successfully, or 1075 * if no activity was specified, contains only {@link #KEY_INTENT} 1076 * needed to launch the authenticator's settings dialog. 1077 * 1078 * <p>If an error occurred, {@link AccountManagerFuture#getResult()} throws: 1079 * <ul> 1080 * <li> {@link AuthenticatorException} if no authenticator was registered for 1081 * this account type or the authenticator failed to respond 1082 * <li> {@link OperationCanceledException} if the operation was canceled for 1083 * any reason, including the user canceling the settings dialog 1084 * <li> {@link IOException} if the authenticator experienced an I/O problem 1085 * updating settings, usually because of network trouble 1086 * </ul> 1087 */ 1088 public AccountManagerFuture<Bundle> editProperties(final String accountType, 1089 final Activity activity, final AccountManagerCallback<Bundle> callback, 1090 final Handler handler) { 1091 return new AmsTask(activity, handler, callback) { 1092 public void doWork() throws RemoteException { 1093 mService.editProperties(mResponse, accountType, activity != null); 1094 } 1095 }.start(); 1096 } 1097 1098 private void ensureNotOnMainThread() { 1099 final Looper looper = Looper.myLooper(); 1100 if (looper != null && looper == mContext.getMainLooper()) { 1101 final IllegalStateException exception = new IllegalStateException( 1102 "calling this from your main thread can lead to deadlock"); 1103 Log.e(TAG, "calling this from your main thread can lead to deadlock and/or ANRs", 1104 exception); 1105 if (mContext.getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.FROYO) { 1106 throw exception; 1107 } 1108 } 1109 } 1110 1111 private void postToHandler(Handler handler, final AccountManagerCallback<Bundle> callback, 1112 final AccountManagerFuture<Bundle> future) { 1113 handler = handler == null ? mMainHandler : handler; 1114 handler.post(new Runnable() { 1115 public void run() { 1116 callback.run(future); 1117 } 1118 }); 1119 } 1120 1121 private void postToHandler(Handler handler, final OnAccountsUpdateListener listener, 1122 final Account[] accounts) { 1123 final Account[] accountsCopy = new Account[accounts.length]; 1124 // send a copy to make sure that one doesn't 1125 // change what another sees 1126 System.arraycopy(accounts, 0, accountsCopy, 0, accountsCopy.length); 1127 handler = (handler == null) ? mMainHandler : handler; 1128 handler.post(new Runnable() { 1129 public void run() { 1130 try { 1131 listener.onAccountsUpdated(accountsCopy); 1132 } catch (SQLException e) { 1133 // Better luck next time. If the problem was disk-full, 1134 // the STORAGE_OK intent will re-trigger the update. 1135 Log.e(TAG, "Can't update accounts", e); 1136 } 1137 } 1138 }); 1139 } 1140 1141 private abstract class AmsTask extends FutureTask<Bundle> implements AccountManagerFuture<Bundle> { 1142 final IAccountManagerResponse mResponse; 1143 final Handler mHandler; 1144 final AccountManagerCallback<Bundle> mCallback; 1145 final Activity mActivity; 1146 public AmsTask(Activity activity, Handler handler, AccountManagerCallback<Bundle> callback) { 1147 super(new Callable<Bundle>() { 1148 public Bundle call() throws Exception { 1149 throw new IllegalStateException("this should never be called"); 1150 } 1151 }); 1152 1153 mHandler = handler; 1154 mCallback = callback; 1155 mActivity = activity; 1156 mResponse = new Response(); 1157 } 1158 1159 public final AccountManagerFuture<Bundle> start() { 1160 try { 1161 doWork(); 1162 } catch (RemoteException e) { 1163 setException(e); 1164 } 1165 return this; 1166 } 1167 1168 public abstract void doWork() throws RemoteException; 1169 1170 private Bundle internalGetResult(Long timeout, TimeUnit unit) 1171 throws OperationCanceledException, IOException, AuthenticatorException { 1172 if (!isDone()) { 1173 ensureNotOnMainThread(); 1174 } 1175 try { 1176 if (timeout == null) { 1177 return get(); 1178 } else { 1179 return get(timeout, unit); 1180 } 1181 } catch (CancellationException e) { 1182 throw new OperationCanceledException(); 1183 } catch (TimeoutException e) { 1184 // fall through and cancel 1185 } catch (InterruptedException e) { 1186 // fall through and cancel 1187 } catch (ExecutionException e) { 1188 final Throwable cause = e.getCause(); 1189 if (cause instanceof IOException) { 1190 throw (IOException) cause; 1191 } else if (cause instanceof UnsupportedOperationException) { 1192 throw new AuthenticatorException(cause); 1193 } else if (cause instanceof AuthenticatorException) { 1194 throw (AuthenticatorException) cause; 1195 } else if (cause instanceof RuntimeException) { 1196 throw (RuntimeException) cause; 1197 } else if (cause instanceof Error) { 1198 throw (Error) cause; 1199 } else { 1200 throw new IllegalStateException(cause); 1201 } 1202 } finally { 1203 cancel(true /* interrupt if running */); 1204 } 1205 throw new OperationCanceledException(); 1206 } 1207 1208 public Bundle getResult() 1209 throws OperationCanceledException, IOException, AuthenticatorException { 1210 return internalGetResult(null, null); 1211 } 1212 1213 public Bundle getResult(long timeout, TimeUnit unit) 1214 throws OperationCanceledException, IOException, AuthenticatorException { 1215 return internalGetResult(timeout, unit); 1216 } 1217 1218 protected void done() { 1219 if (mCallback != null) { 1220 postToHandler(mHandler, mCallback, this); 1221 } 1222 } 1223 1224 /** Handles the responses from the AccountManager */ 1225 private class Response extends IAccountManagerResponse.Stub { 1226 public void onResult(Bundle bundle) { 1227 Intent intent = bundle.getParcelable("intent"); 1228 if (intent != null && mActivity != null) { 1229 // since the user provided an Activity we will silently start intents 1230 // that we see 1231 mActivity.startActivity(intent); 1232 // leave the Future running to wait for the real response to this request 1233 } else if (bundle.getBoolean("retry")) { 1234 try { 1235 doWork(); 1236 } catch (RemoteException e) { 1237 // this will only happen if the system process is dead, which means 1238 // we will be dying ourselves 1239 } 1240 } else { 1241 set(bundle); 1242 } 1243 } 1244 1245 public void onError(int code, String message) { 1246 if (code == ERROR_CODE_CANCELED) { 1247 // the authenticator indicated that this request was canceled, do so now 1248 cancel(true /* mayInterruptIfRunning */); 1249 return; 1250 } 1251 setException(convertErrorToException(code, message)); 1252 } 1253 } 1254 1255 } 1256 1257 private abstract class BaseFutureTask<T> extends FutureTask<T> { 1258 final public IAccountManagerResponse mResponse; 1259 final Handler mHandler; 1260 1261 public BaseFutureTask(Handler handler) { 1262 super(new Callable<T>() { 1263 public T call() throws Exception { 1264 throw new IllegalStateException("this should never be called"); 1265 } 1266 }); 1267 mHandler = handler; 1268 mResponse = new Response(); 1269 } 1270 1271 public abstract void doWork() throws RemoteException; 1272 1273 public abstract T bundleToResult(Bundle bundle) throws AuthenticatorException; 1274 1275 protected void postRunnableToHandler(Runnable runnable) { 1276 Handler handler = (mHandler == null) ? mMainHandler : mHandler; 1277 handler.post(runnable); 1278 } 1279 1280 protected void startTask() { 1281 try { 1282 doWork(); 1283 } catch (RemoteException e) { 1284 setException(e); 1285 } 1286 } 1287 1288 protected class Response extends IAccountManagerResponse.Stub { 1289 public void onResult(Bundle bundle) { 1290 try { 1291 T result = bundleToResult(bundle); 1292 if (result == null) { 1293 return; 1294 } 1295 set(result); 1296 return; 1297 } catch (ClassCastException e) { 1298 // we will set the exception below 1299 } catch (AuthenticatorException e) { 1300 // we will set the exception below 1301 } 1302 onError(ERROR_CODE_INVALID_RESPONSE, "no result in response"); 1303 } 1304 1305 public void onError(int code, String message) { 1306 if (code == ERROR_CODE_CANCELED) { 1307 cancel(true /* mayInterruptIfRunning */); 1308 return; 1309 } 1310 setException(convertErrorToException(code, message)); 1311 } 1312 } 1313 } 1314 1315 private abstract class Future2Task<T> 1316 extends BaseFutureTask<T> implements AccountManagerFuture<T> { 1317 final AccountManagerCallback<T> mCallback; 1318 public Future2Task(Handler handler, AccountManagerCallback<T> callback) { 1319 super(handler); 1320 mCallback = callback; 1321 } 1322 1323 protected void done() { 1324 if (mCallback != null) { 1325 postRunnableToHandler(new Runnable() { 1326 public void run() { 1327 mCallback.run(Future2Task.this); 1328 } 1329 }); 1330 } 1331 } 1332 1333 public Future2Task<T> start() { 1334 startTask(); 1335 return this; 1336 } 1337 1338 private T internalGetResult(Long timeout, TimeUnit unit) 1339 throws OperationCanceledException, IOException, AuthenticatorException { 1340 if (!isDone()) { 1341 ensureNotOnMainThread(); 1342 } 1343 try { 1344 if (timeout == null) { 1345 return get(); 1346 } else { 1347 return get(timeout, unit); 1348 } 1349 } catch (InterruptedException e) { 1350 // fall through and cancel 1351 } catch (TimeoutException e) { 1352 // fall through and cancel 1353 } catch (CancellationException e) { 1354 // fall through and cancel 1355 } catch (ExecutionException e) { 1356 final Throwable cause = e.getCause(); 1357 if (cause instanceof IOException) { 1358 throw (IOException) cause; 1359 } else if (cause instanceof UnsupportedOperationException) { 1360 throw new AuthenticatorException(cause); 1361 } else if (cause instanceof AuthenticatorException) { 1362 throw (AuthenticatorException) cause; 1363 } else if (cause instanceof RuntimeException) { 1364 throw (RuntimeException) cause; 1365 } else if (cause instanceof Error) { 1366 throw (Error) cause; 1367 } else { 1368 throw new IllegalStateException(cause); 1369 } 1370 } finally { 1371 cancel(true /* interrupt if running */); 1372 } 1373 throw new OperationCanceledException(); 1374 } 1375 1376 public T getResult() 1377 throws OperationCanceledException, IOException, AuthenticatorException { 1378 return internalGetResult(null, null); 1379 } 1380 1381 public T getResult(long timeout, TimeUnit unit) 1382 throws OperationCanceledException, IOException, AuthenticatorException { 1383 return internalGetResult(timeout, unit); 1384 } 1385 1386 } 1387 1388 private Exception convertErrorToException(int code, String message) { 1389 if (code == ERROR_CODE_NETWORK_ERROR) { 1390 return new IOException(message); 1391 } 1392 1393 if (code == ERROR_CODE_UNSUPPORTED_OPERATION) { 1394 return new UnsupportedOperationException(message); 1395 } 1396 1397 if (code == ERROR_CODE_INVALID_RESPONSE) { 1398 return new AuthenticatorException(message); 1399 } 1400 1401 if (code == ERROR_CODE_BAD_ARGUMENTS) { 1402 return new IllegalArgumentException(message); 1403 } 1404 1405 return new AuthenticatorException(message); 1406 } 1407 1408 private class GetAuthTokenByTypeAndFeaturesTask 1409 extends AmsTask implements AccountManagerCallback<Bundle> { 1410 GetAuthTokenByTypeAndFeaturesTask(final String accountType, final String authTokenType, 1411 final String[] features, Activity activityForPrompting, 1412 final Bundle addAccountOptions, final Bundle loginOptions, 1413 AccountManagerCallback<Bundle> callback, Handler handler) { 1414 super(activityForPrompting, handler, callback); 1415 if (accountType == null) throw new IllegalArgumentException("account type is null"); 1416 mAccountType = accountType; 1417 mAuthTokenType = authTokenType; 1418 mFeatures = features; 1419 mAddAccountOptions = addAccountOptions; 1420 mLoginOptions = loginOptions; 1421 mMyCallback = this; 1422 } 1423 volatile AccountManagerFuture<Bundle> mFuture = null; 1424 final String mAccountType; 1425 final String mAuthTokenType; 1426 final String[] mFeatures; 1427 final Bundle mAddAccountOptions; 1428 final Bundle mLoginOptions; 1429 final AccountManagerCallback<Bundle> mMyCallback; 1430 1431 public void doWork() throws RemoteException { 1432 getAccountsByTypeAndFeatures(mAccountType, mFeatures, 1433 new AccountManagerCallback<Account[]>() { 1434 public void run(AccountManagerFuture<Account[]> future) { 1435 Account[] accounts; 1436 try { 1437 accounts = future.getResult(); 1438 } catch (OperationCanceledException e) { 1439 setException(e); 1440 return; 1441 } catch (IOException e) { 1442 setException(e); 1443 return; 1444 } catch (AuthenticatorException e) { 1445 setException(e); 1446 return; 1447 } 1448 1449 if (accounts.length == 0) { 1450 if (mActivity != null) { 1451 // no accounts, add one now. pretend that the user directly 1452 // made this request 1453 mFuture = addAccount(mAccountType, mAuthTokenType, mFeatures, 1454 mAddAccountOptions, mActivity, mMyCallback, mHandler); 1455 } else { 1456 // send result since we can't prompt to add an account 1457 Bundle result = new Bundle(); 1458 result.putString(KEY_ACCOUNT_NAME, null); 1459 result.putString(KEY_ACCOUNT_TYPE, null); 1460 result.putString(KEY_AUTHTOKEN, null); 1461 try { 1462 mResponse.onResult(result); 1463 } catch (RemoteException e) { 1464 // this will never happen 1465 } 1466 // we are done 1467 } 1468 } else if (accounts.length == 1) { 1469 // have a single account, return an authtoken for it 1470 if (mActivity == null) { 1471 mFuture = getAuthToken(accounts[0], mAuthTokenType, 1472 false /* notifyAuthFailure */, mMyCallback, mHandler); 1473 } else { 1474 mFuture = getAuthToken(accounts[0], 1475 mAuthTokenType, mLoginOptions, 1476 mActivity, mMyCallback, mHandler); 1477 } 1478 } else { 1479 if (mActivity != null) { 1480 IAccountManagerResponse chooseResponse = 1481 new IAccountManagerResponse.Stub() { 1482 public void onResult(Bundle value) throws RemoteException { 1483 Account account = new Account( 1484 value.getString(KEY_ACCOUNT_NAME), 1485 value.getString(KEY_ACCOUNT_TYPE)); 1486 mFuture = getAuthToken(account, mAuthTokenType, mLoginOptions, 1487 mActivity, mMyCallback, mHandler); 1488 } 1489 1490 public void onError(int errorCode, String errorMessage) 1491 throws RemoteException { 1492 mResponse.onError(errorCode, errorMessage); 1493 } 1494 }; 1495 // have many accounts, launch the chooser 1496 Intent intent = new Intent(); 1497 intent.setClassName("android", 1498 "android.accounts.ChooseAccountActivity"); 1499 intent.putExtra(KEY_ACCOUNTS, accounts); 1500 intent.putExtra(KEY_ACCOUNT_MANAGER_RESPONSE, 1501 new AccountManagerResponse(chooseResponse)); 1502 mActivity.startActivity(intent); 1503 // the result will arrive via the IAccountManagerResponse 1504 } else { 1505 // send result since we can't prompt to select an account 1506 Bundle result = new Bundle(); 1507 result.putString(KEY_ACCOUNTS, null); 1508 try { 1509 mResponse.onResult(result); 1510 } catch (RemoteException e) { 1511 // this will never happen 1512 } 1513 // we are done 1514 } 1515 } 1516 }}, mHandler); 1517 } 1518 1519 public void run(AccountManagerFuture<Bundle> future) { 1520 try { 1521 set(future.getResult()); 1522 } catch (OperationCanceledException e) { 1523 cancel(true /* mayInterruptIfRUnning */); 1524 } catch (IOException e) { 1525 setException(e); 1526 } catch (AuthenticatorException e) { 1527 setException(e); 1528 } 1529 } 1530 } 1531 1532 /** 1533 * This convenience helper combines the functionality of 1534 * {@link #getAccountsByTypeAndFeatures}, {@link #getAuthToken}, and 1535 * {@link #addAccount}. 1536 * 1537 * <p>This method gets a list of the accounts matching the 1538 * specified type and feature set; if there is exactly one, it is 1539 * used; if there are more than one, the user is prompted to pick one; 1540 * if there are none, the user is prompted to add one. Finally, 1541 * an auth token is acquired for the chosen account. 1542 * 1543 * <p>This method may be called from any thread, but the returned 1544 * {@link AccountManagerFuture} must not be used on the main thread. 1545 * 1546 * <p>This method requires the caller to hold the permission 1547 * {@link android.Manifest.permission#MANAGE_ACCOUNTS}. 1548 * 1549 * @param accountType The account type required 1550 * (see {@link #getAccountsByType}), must not be null 1551 * @param authTokenType The desired auth token type 1552 * (see {@link #getAuthToken}), must not be null 1553 * @param features Required features for the account 1554 * (see {@link #getAccountsByTypeAndFeatures}), may be null or empty 1555 * @param activity The {@link Activity} context to use for launching new 1556 * sub-Activities to prompt to add an account, select an account, 1557 * and/or enter a password, as necessary; used only to call 1558 * startActivity(); should not be null 1559 * @param addAccountOptions Authenticator-specific options to use for 1560 * adding new accounts; may be null or empty 1561 * @param getAuthTokenOptions Authenticator-specific options to use for 1562 * getting auth tokens; may be null or empty 1563 * @param callback Callback to invoke when the request completes, 1564 * null for no callback 1565 * @param handler {@link Handler} identifying the callback thread, 1566 * null for the main thread 1567 * @return An {@link AccountManagerFuture} which resolves to a Bundle with 1568 * at least the following fields: 1569 * <ul> 1570 * <li> {@link #KEY_ACCOUNT_NAME} - the name of the account 1571 * <li> {@link #KEY_ACCOUNT_TYPE} - the type of the account 1572 * <li> {@link #KEY_AUTHTOKEN} - the auth token you wanted 1573 * </ul> 1574 * 1575 * <p>If an error occurred, {@link AccountManagerFuture#getResult()} throws: 1576 * <ul> 1577 * <li> {@link AuthenticatorException} if no authenticator was registered for 1578 * this account type or the authenticator failed to respond 1579 * <li> {@link OperationCanceledException} if the operation was canceled for 1580 * any reason, including the user canceling any operation 1581 * <li> {@link IOException} if the authenticator experienced an I/O problem 1582 * updating settings, usually because of network trouble 1583 * </ul> 1584 */ 1585 public AccountManagerFuture<Bundle> getAuthTokenByFeatures( 1586 final String accountType, final String authTokenType, final String[] features, 1587 final Activity activity, final Bundle addAccountOptions, 1588 final Bundle getAuthTokenOptions, 1589 final AccountManagerCallback<Bundle> callback, final Handler handler) { 1590 if (accountType == null) throw new IllegalArgumentException("account type is null"); 1591 if (authTokenType == null) throw new IllegalArgumentException("authTokenType is null"); 1592 final GetAuthTokenByTypeAndFeaturesTask task = 1593 new GetAuthTokenByTypeAndFeaturesTask(accountType, authTokenType, features, 1594 activity, addAccountOptions, getAuthTokenOptions, callback, handler); 1595 task.start(); 1596 return task; 1597 } 1598 1599 private final HashMap<OnAccountsUpdateListener, Handler> mAccountsUpdatedListeners = 1600 Maps.newHashMap(); 1601 1602 /** 1603 * BroadcastReceiver that listens for the LOGIN_ACCOUNTS_CHANGED_ACTION intent 1604 * so that it can read the updated list of accounts and send them to the listener 1605 * in mAccountsUpdatedListeners. 1606 */ 1607 private final BroadcastReceiver mAccountsChangedBroadcastReceiver = new BroadcastReceiver() { 1608 public void onReceive(final Context context, final Intent intent) { 1609 final Account[] accounts = getAccounts(); 1610 // send the result to the listeners 1611 synchronized (mAccountsUpdatedListeners) { 1612 for (Map.Entry<OnAccountsUpdateListener, Handler> entry : 1613 mAccountsUpdatedListeners.entrySet()) { 1614 postToHandler(entry.getValue(), entry.getKey(), accounts); 1615 } 1616 } 1617 } 1618 }; 1619 1620 /** 1621 * Adds an {@link OnAccountsUpdateListener} to this instance of the 1622 * {@link AccountManager}. This listener will be notified whenever the 1623 * list of accounts on the device changes. 1624 * 1625 * <p>As long as this listener is present, the AccountManager instance 1626 * will not be garbage-collected, and neither will the {@link Context} 1627 * used to retrieve it, which may be a large Activity instance. To avoid 1628 * memory leaks, you must remove this listener before then. Normally 1629 * listeners are added in an Activity or Service's {@link Activity#onCreate} 1630 * and removed in {@link Activity#onDestroy}. 1631 * 1632 * <p>It is safe to call this method from the main thread. 1633 * 1634 * <p>No permission is required to call this method. 1635 * 1636 * @param listener The listener to send notifications to 1637 * @param handler {@link Handler} identifying the thread to use 1638 * for notifications, null for the main thread 1639 * @param updateImmediately If true, the listener will be invoked 1640 * (on the handler thread) right away with the current account list 1641 * @throws IllegalArgumentException if listener is null 1642 * @throws IllegalStateException if listener was already added 1643 */ 1644 public void addOnAccountsUpdatedListener(final OnAccountsUpdateListener listener, 1645 Handler handler, boolean updateImmediately) { 1646 if (listener == null) { 1647 throw new IllegalArgumentException("the listener is null"); 1648 } 1649 synchronized (mAccountsUpdatedListeners) { 1650 if (mAccountsUpdatedListeners.containsKey(listener)) { 1651 throw new IllegalStateException("this listener is already added"); 1652 } 1653 final boolean wasEmpty = mAccountsUpdatedListeners.isEmpty(); 1654 1655 mAccountsUpdatedListeners.put(listener, handler); 1656 1657 if (wasEmpty) { 1658 // Register a broadcast receiver to monitor account changes 1659 IntentFilter intentFilter = new IntentFilter(); 1660 intentFilter.addAction(LOGIN_ACCOUNTS_CHANGED_ACTION); 1661 // To recover from disk-full. 1662 intentFilter.addAction(Intent.ACTION_DEVICE_STORAGE_OK); 1663 mContext.registerReceiver(mAccountsChangedBroadcastReceiver, intentFilter); 1664 } 1665 } 1666 1667 if (updateImmediately) { 1668 postToHandler(handler, listener, getAccounts()); 1669 } 1670 } 1671 1672 /** 1673 * Removes an {@link OnAccountsUpdateListener} previously registered with 1674 * {@link #addOnAccountsUpdatedListener}. The listener will no longer 1675 * receive notifications of account changes. 1676 * 1677 * <p>It is safe to call this method from the main thread. 1678 * 1679 * <p>No permission is required to call this method. 1680 * 1681 * @param listener The previously added listener to remove 1682 * @throws IllegalArgumentException if listener is null 1683 * @throws IllegalStateException if listener was not already added 1684 */ 1685 public void removeOnAccountsUpdatedListener(OnAccountsUpdateListener listener) { 1686 if (listener == null) { 1687 Log.e(TAG, "Missing listener"); 1688 return; 1689 } 1690 synchronized (mAccountsUpdatedListeners) { 1691 if (!mAccountsUpdatedListeners.containsKey(listener)) { 1692 Log.e(TAG, "Listener was not previously added"); 1693 return; 1694 } 1695 mAccountsUpdatedListeners.remove(listener); 1696 if (mAccountsUpdatedListeners.isEmpty()) { 1697 mContext.unregisterReceiver(mAccountsChangedBroadcastReceiver); 1698 } 1699 } 1700 } 1701} 1702