1 /* 2 * Copyright (C) 2013 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 android.provider; 18 19 import static android.net.TrafficStats.KB_IN_BYTES; 20 import static android.system.OsConstants.SEEK_SET; 21 22 import android.annotation.Nullable; 23 import android.content.ContentProviderClient; 24 import android.content.ContentResolver; 25 import android.content.Context; 26 import android.content.Intent; 27 import android.content.pm.ResolveInfo; 28 import android.content.res.AssetFileDescriptor; 29 import android.database.Cursor; 30 import android.graphics.Bitmap; 31 import android.graphics.BitmapFactory; 32 import android.graphics.Matrix; 33 import android.graphics.Point; 34 import android.media.ExifInterface; 35 import android.net.Uri; 36 import android.os.Bundle; 37 import android.os.CancellationSignal; 38 import android.os.OperationCanceledException; 39 import android.os.ParcelFileDescriptor; 40 import android.os.ParcelFileDescriptor.OnCloseListener; 41 import android.os.RemoteException; 42 import android.os.storage.StorageVolume; 43 import android.system.ErrnoException; 44 import android.system.Os; 45 import android.util.Log; 46 47 import libcore.io.IoUtils; 48 49 import java.io.BufferedInputStream; 50 import java.io.File; 51 import java.io.FileDescriptor; 52 import java.io.FileInputStream; 53 import java.io.FileNotFoundException; 54 import java.io.IOException; 55 import java.util.List; 56 57 /** 58 * Defines the contract between a documents provider and the platform. 59 * <p> 60 * To create a document provider, extend {@link DocumentsProvider}, which 61 * provides a foundational implementation of this contract. 62 * <p> 63 * All client apps must hold a valid URI permission grant to access documents, 64 * typically issued when a user makes a selection through 65 * {@link Intent#ACTION_OPEN_DOCUMENT}, {@link Intent#ACTION_CREATE_DOCUMENT}, 66 * {@link Intent#ACTION_OPEN_DOCUMENT_TREE}, or 67 * {@link StorageVolume#createAccessIntent(String) StorageVolume.createAccessIntent}. 68 * 69 * @see DocumentsProvider 70 */ 71 public final class DocumentsContract { 72 private static final String TAG = "DocumentsContract"; 73 74 // content://com.example/root/ 75 // content://com.example/root/sdcard/ 76 // content://com.example/root/sdcard/recent/ 77 // content://com.example/root/sdcard/search/?query=pony 78 // content://com.example/document/12/ 79 // content://com.example/document/12/children/ 80 // content://com.example/tree/12/document/24/ 81 // content://com.example/tree/12/document/24/children/ 82 83 private DocumentsContract() { 84 } 85 86 /** 87 * Intent action used to identify {@link DocumentsProvider} instances. This 88 * is used in the {@code <intent-filter>} of a {@code <provider>}. 89 */ 90 public static final String PROVIDER_INTERFACE = "android.content.action.DOCUMENTS_PROVIDER"; 91 92 /** {@hide} */ 93 public static final String EXTRA_PACKAGE_NAME = "android.content.extra.PACKAGE_NAME"; 94 95 /** {@hide} */ 96 public static final String EXTRA_SHOW_ADVANCED = "android.content.extra.SHOW_ADVANCED"; 97 98 /** {@hide} */ 99 public static final String EXTRA_SHOW_FILESIZE = "android.content.extra.SHOW_FILESIZE"; 100 101 /** {@hide} */ 102 public static final String EXTRA_FANCY_FEATURES = "android.content.extra.FANCY"; 103 104 /** {@hide} */ 105 public static final String EXTRA_TARGET_URI = "android.content.extra.TARGET_URI"; 106 107 /** 108 * Set this in a DocumentsUI intent to cause a package's own roots to be 109 * excluded from the roots list. 110 */ 111 public static final String EXTRA_EXCLUDE_SELF = "android.provider.extra.EXCLUDE_SELF"; 112 113 /** 114 * Included in {@link AssetFileDescriptor#getExtras()} when returned 115 * thumbnail should be rotated. 116 * 117 * @see MediaStore.Images.ImageColumns#ORIENTATION 118 */ 119 public static final String EXTRA_ORIENTATION = "android.provider.extra.ORIENTATION"; 120 121 /** 122 * Overrides the default prompt text in DocumentsUI when set in an intent. 123 */ 124 public static final String EXTRA_PROMPT = "android.provider.extra.PROMPT"; 125 126 /** {@hide} */ 127 public static final String ACTION_MANAGE_DOCUMENT = "android.provider.action.MANAGE_DOCUMENT"; 128 129 /** {@hide} */ 130 public static final String ACTION_BROWSE = "android.provider.action.BROWSE"; 131 132 /** {@hide} */ 133 public static final String 134 ACTION_DOCUMENT_ROOT_SETTINGS = "android.provider.action.DOCUMENT_ROOT_SETTINGS"; 135 136 /** 137 * Buffer is large enough to rewind past any EXIF headers. 138 */ 139 private static final int THUMBNAIL_BUFFER_SIZE = (int) (128 * KB_IN_BYTES); 140 141 /** {@hide} */ 142 public static final String PACKAGE_DOCUMENTS_UI = "com.android.documentsui"; 143 144 /** 145 * Constants related to a document, including {@link Cursor} column names 146 * and flags. 147 * <p> 148 * A document can be either an openable stream (with a specific MIME type), 149 * or a directory containing additional documents (with the 150 * {@link #MIME_TYPE_DIR} MIME type). A directory represents the top of a 151 * subtree containing zero or more documents, which can recursively contain 152 * even more documents and directories. 153 * <p> 154 * All columns are <em>read-only</em> to client applications. 155 */ 156 public final static class Document { 157 private Document() { 158 } 159 160 /** 161 * Unique ID of a document. This ID is both provided by and interpreted 162 * by a {@link DocumentsProvider}, and should be treated as an opaque 163 * value by client applications. This column is required. 164 * <p> 165 * Each document must have a unique ID within a provider, but that 166 * single document may be included as a child of multiple directories. 167 * <p> 168 * A provider must always return durable IDs, since they will be used to 169 * issue long-term URI permission grants when an application interacts 170 * with {@link Intent#ACTION_OPEN_DOCUMENT} and 171 * {@link Intent#ACTION_CREATE_DOCUMENT}. 172 * <p> 173 * Type: STRING 174 */ 175 public static final String COLUMN_DOCUMENT_ID = "document_id"; 176 177 /** 178 * Concrete MIME type of a document. For example, "image/png" or 179 * "application/pdf" for openable files. A document can also be a 180 * directory containing additional documents, which is represented with 181 * the {@link #MIME_TYPE_DIR} MIME type. This column is required. 182 * <p> 183 * Type: STRING 184 * 185 * @see #MIME_TYPE_DIR 186 */ 187 public static final String COLUMN_MIME_TYPE = "mime_type"; 188 189 /** 190 * Display name of a document, used as the primary title displayed to a 191 * user. This column is required. 192 * <p> 193 * Type: STRING 194 */ 195 public static final String COLUMN_DISPLAY_NAME = OpenableColumns.DISPLAY_NAME; 196 197 /** 198 * Summary of a document, which may be shown to a user. This column is 199 * optional, and may be {@code null}. 200 * <p> 201 * Type: STRING 202 */ 203 public static final String COLUMN_SUMMARY = "summary"; 204 205 /** 206 * Timestamp when a document was last modified, in milliseconds since 207 * January 1, 1970 00:00:00.0 UTC. This column is required, and may be 208 * {@code null} if unknown. A {@link DocumentsProvider} can update this 209 * field using events from {@link OnCloseListener} or other reliable 210 * {@link ParcelFileDescriptor} transports. 211 * <p> 212 * Type: INTEGER (long) 213 * 214 * @see System#currentTimeMillis() 215 */ 216 public static final String COLUMN_LAST_MODIFIED = "last_modified"; 217 218 /** 219 * Specific icon resource ID for a document. This column is optional, 220 * and may be {@code null} to use a platform-provided default icon based 221 * on {@link #COLUMN_MIME_TYPE}. 222 * <p> 223 * Type: INTEGER (int) 224 */ 225 public static final String COLUMN_ICON = "icon"; 226 227 /** 228 * Flags that apply to a document. This column is required. 229 * <p> 230 * Type: INTEGER (int) 231 * 232 * @see #FLAG_SUPPORTS_WRITE 233 * @see #FLAG_SUPPORTS_DELETE 234 * @see #FLAG_SUPPORTS_THUMBNAIL 235 * @see #FLAG_DIR_PREFERS_GRID 236 * @see #FLAG_DIR_PREFERS_LAST_MODIFIED 237 * @see #FLAG_VIRTUAL_DOCUMENT 238 * @see #FLAG_ARCHIVE 239 * @see #FLAG_SUPPORTS_COPY 240 * @see #FLAG_SUPPORTS_MOVE 241 * @see #FLAG_SUPPORTS_REMOVE 242 */ 243 public static final String COLUMN_FLAGS = "flags"; 244 245 /** 246 * Size of a document, in bytes, or {@code null} if unknown. This column 247 * is required. 248 * <p> 249 * Type: INTEGER (long) 250 */ 251 public static final String COLUMN_SIZE = OpenableColumns.SIZE; 252 253 /** 254 * MIME type of a document which is a directory that may contain 255 * additional documents. 256 * 257 * @see #COLUMN_MIME_TYPE 258 */ 259 public static final String MIME_TYPE_DIR = "vnd.android.document/directory"; 260 261 /** 262 * Flag indicating that a document can be represented as a thumbnail. 263 * 264 * @see #COLUMN_FLAGS 265 * @see DocumentsContract#getDocumentThumbnail(ContentResolver, Uri, 266 * Point, CancellationSignal) 267 * @see DocumentsProvider#openDocumentThumbnail(String, Point, 268 * android.os.CancellationSignal) 269 */ 270 public static final int FLAG_SUPPORTS_THUMBNAIL = 1; 271 272 /** 273 * Flag indicating that a document supports writing. 274 * <p> 275 * When a document is opened with {@link Intent#ACTION_OPEN_DOCUMENT}, 276 * the calling application is granted both 277 * {@link Intent#FLAG_GRANT_READ_URI_PERMISSION} and 278 * {@link Intent#FLAG_GRANT_WRITE_URI_PERMISSION}. However, the actual 279 * writability of a document may change over time, for example due to 280 * remote access changes. This flag indicates that a document client can 281 * expect {@link ContentResolver#openOutputStream(Uri)} to succeed. 282 * 283 * @see #COLUMN_FLAGS 284 */ 285 public static final int FLAG_SUPPORTS_WRITE = 1 << 1; 286 287 /** 288 * Flag indicating that a document is deletable. 289 * 290 * @see #COLUMN_FLAGS 291 * @see DocumentsContract#deleteDocument(ContentResolver, Uri) 292 * @see DocumentsProvider#deleteDocument(String) 293 */ 294 public static final int FLAG_SUPPORTS_DELETE = 1 << 2; 295 296 /** 297 * Flag indicating that a document is a directory that supports creation 298 * of new files within it. Only valid when {@link #COLUMN_MIME_TYPE} is 299 * {@link #MIME_TYPE_DIR}. 300 * 301 * @see #COLUMN_FLAGS 302 * @see DocumentsProvider#createDocument(String, String, String) 303 */ 304 public static final int FLAG_DIR_SUPPORTS_CREATE = 1 << 3; 305 306 /** 307 * Flag indicating that a directory prefers its contents be shown in a 308 * larger format grid. Usually suitable when a directory contains mostly 309 * pictures. Only valid when {@link #COLUMN_MIME_TYPE} is 310 * {@link #MIME_TYPE_DIR}. 311 * 312 * @see #COLUMN_FLAGS 313 */ 314 public static final int FLAG_DIR_PREFERS_GRID = 1 << 4; 315 316 /** 317 * Flag indicating that a directory prefers its contents be sorted by 318 * {@link #COLUMN_LAST_MODIFIED}. Only valid when 319 * {@link #COLUMN_MIME_TYPE} is {@link #MIME_TYPE_DIR}. 320 * 321 * @see #COLUMN_FLAGS 322 */ 323 public static final int FLAG_DIR_PREFERS_LAST_MODIFIED = 1 << 5; 324 325 /** 326 * Flag indicating that a document can be renamed. 327 * 328 * @see #COLUMN_FLAGS 329 * @see DocumentsContract#renameDocument(ContentProviderClient, Uri, 330 * String) 331 * @see DocumentsProvider#renameDocument(String, String) 332 */ 333 public static final int FLAG_SUPPORTS_RENAME = 1 << 6; 334 335 /** 336 * Flag indicating that a document can be copied to another location 337 * within the same document provider. 338 * 339 * @see #COLUMN_FLAGS 340 * @see DocumentsContract#copyDocument(ContentProviderClient, Uri, Uri) 341 * @see DocumentsProvider#copyDocument(String, String) 342 */ 343 public static final int FLAG_SUPPORTS_COPY = 1 << 7; 344 345 /** 346 * Flag indicating that a document can be moved to another location 347 * within the same document provider. 348 * 349 * @see #COLUMN_FLAGS 350 * @see DocumentsContract#moveDocument(ContentProviderClient, Uri, Uri, Uri) 351 * @see DocumentsProvider#moveDocument(String, String, String) 352 */ 353 public static final int FLAG_SUPPORTS_MOVE = 1 << 8; 354 355 /** 356 * Flag indicating that a document is virtual, and doesn't have byte 357 * representation in the MIME type specified as {@link #COLUMN_MIME_TYPE}. 358 * 359 * @see #COLUMN_FLAGS 360 * @see #COLUMN_MIME_TYPE 361 * @see DocumentsProvider#openTypedDocument(String, String, Bundle, 362 * android.os.CancellationSignal) 363 * @see DocumentsProvider#getDocumentStreamTypes(String, String) 364 */ 365 public static final int FLAG_VIRTUAL_DOCUMENT = 1 << 9; 366 367 /** 368 * Flag indicating that a document can be removed from a parent. 369 * 370 * @see #COLUMN_FLAGS 371 * @see DocumentsContract#removeDocument(ContentProviderClient, Uri, Uri) 372 * @see DocumentsProvider#removeDocument(String, String) 373 */ 374 public static final int FLAG_SUPPORTS_REMOVE = 1 << 10; 375 376 /** 377 * Flag indicating that a document is an archive, and it's contents can be 378 * obtained via {@link DocumentsProvider#queryChildDocuments}. 379 * <p> 380 * The <em>provider</em> support library offers utility classes to add common 381 * archive support. 382 * 383 * @see #COLUMN_FLAGS 384 * @see DocumentsProvider#queryChildDocuments(String, String[], String) 385 * @hide 386 */ 387 public static final int FLAG_ARCHIVE = 1 << 15; 388 389 /** 390 * Flag indicating that a document is not complete, likely its 391 * contents are being downloaded. Partial files cannot be opened, 392 * copied, moved in the UI. But they can be deleted and retried 393 * if they represent a failed download. 394 * 395 * @see #COLUMN_FLAGS 396 * @hide 397 */ 398 public static final int FLAG_PARTIAL = 1 << 16; 399 } 400 401 /** 402 * Constants related to a root of documents, including {@link Cursor} column 403 * names and flags. A root is the start of a tree of documents, such as a 404 * physical storage device, or an account. Each root starts at the directory 405 * referenced by {@link Root#COLUMN_DOCUMENT_ID}, which can recursively 406 * contain both documents and directories. 407 * <p> 408 * All columns are <em>read-only</em> to client applications. 409 */ 410 public final static class Root { 411 private Root() { 412 } 413 414 /** 415 * Unique ID of a root. This ID is both provided by and interpreted by a 416 * {@link DocumentsProvider}, and should be treated as an opaque value 417 * by client applications. This column is required. 418 * <p> 419 * Type: STRING 420 */ 421 public static final String COLUMN_ROOT_ID = "root_id"; 422 423 /** 424 * Flags that apply to a root. This column is required. 425 * <p> 426 * Type: INTEGER (int) 427 * 428 * @see #FLAG_LOCAL_ONLY 429 * @see #FLAG_SUPPORTS_CREATE 430 * @see #FLAG_SUPPORTS_RECENTS 431 * @see #FLAG_SUPPORTS_SEARCH 432 */ 433 public static final String COLUMN_FLAGS = "flags"; 434 435 /** 436 * Icon resource ID for a root. This column is required. 437 * <p> 438 * Type: INTEGER (int) 439 */ 440 public static final String COLUMN_ICON = "icon"; 441 442 /** 443 * Title for a root, which will be shown to a user. This column is 444 * required. For a single storage service surfacing multiple accounts as 445 * different roots, this title should be the name of the service. 446 * <p> 447 * Type: STRING 448 */ 449 public static final String COLUMN_TITLE = "title"; 450 451 /** 452 * Summary for this root, which may be shown to a user. This column is 453 * optional, and may be {@code null}. For a single storage service 454 * surfacing multiple accounts as different roots, this summary should 455 * be the name of the account. 456 * <p> 457 * Type: STRING 458 */ 459 public static final String COLUMN_SUMMARY = "summary"; 460 461 /** 462 * Document which is a directory that represents the top directory of 463 * this root. This column is required. 464 * <p> 465 * Type: STRING 466 * 467 * @see Document#COLUMN_DOCUMENT_ID 468 */ 469 public static final String COLUMN_DOCUMENT_ID = "document_id"; 470 471 /** 472 * Number of bytes available in this root. This column is optional, and 473 * may be {@code null} if unknown or unbounded. 474 * <p> 475 * Type: INTEGER (long) 476 */ 477 public static final String COLUMN_AVAILABLE_BYTES = "available_bytes"; 478 479 /** 480 * Capacity of a root in bytes. This column is optional, and may be 481 * {@code null} if unknown or unbounded. 482 * <p> 483 * Type: INTEGER (long) 484 */ 485 public static final String COLUMN_CAPACITY_BYTES = "capacity_bytes"; 486 487 /** 488 * MIME types supported by this root. This column is optional, and if 489 * {@code null} the root is assumed to support all MIME types. Multiple 490 * MIME types can be separated by a newline. For example, a root 491 * supporting audio might return "audio/*\napplication/x-flac". 492 * <p> 493 * Type: STRING 494 */ 495 public static final String COLUMN_MIME_TYPES = "mime_types"; 496 497 /** {@hide} */ 498 public static final String MIME_TYPE_ITEM = "vnd.android.document/root"; 499 500 /** 501 * Flag indicating that at least one directory under this root supports 502 * creating content. Roots with this flag will be shown when an 503 * application interacts with {@link Intent#ACTION_CREATE_DOCUMENT}. 504 * 505 * @see #COLUMN_FLAGS 506 */ 507 public static final int FLAG_SUPPORTS_CREATE = 1; 508 509 /** 510 * Flag indicating that this root offers content that is strictly local 511 * on the device. That is, no network requests are made for the content. 512 * 513 * @see #COLUMN_FLAGS 514 * @see Intent#EXTRA_LOCAL_ONLY 515 */ 516 public static final int FLAG_LOCAL_ONLY = 1 << 1; 517 518 /** 519 * Flag indicating that this root can be queried to provide recently 520 * modified documents. 521 * 522 * @see #COLUMN_FLAGS 523 * @see DocumentsContract#buildRecentDocumentsUri(String, String) 524 * @see DocumentsProvider#queryRecentDocuments(String, String[]) 525 */ 526 public static final int FLAG_SUPPORTS_RECENTS = 1 << 2; 527 528 /** 529 * Flag indicating that this root supports search. 530 * 531 * @see #COLUMN_FLAGS 532 * @see DocumentsContract#buildSearchDocumentsUri(String, String, 533 * String) 534 * @see DocumentsProvider#querySearchDocuments(String, String, 535 * String[]) 536 */ 537 public static final int FLAG_SUPPORTS_SEARCH = 1 << 3; 538 539 /** 540 * Flag indicating that this root supports testing parent child 541 * relationships. 542 * 543 * @see #COLUMN_FLAGS 544 * @see DocumentsProvider#isChildDocument(String, String) 545 */ 546 public static final int FLAG_SUPPORTS_IS_CHILD = 1 << 4; 547 548 /** 549 * Flag indicating that this root is currently empty. This may be used 550 * to hide the root when opening documents, but the root will still be 551 * shown when creating documents and {@link #FLAG_SUPPORTS_CREATE} is 552 * also set. If the value of this flag changes, such as when a root 553 * becomes non-empty, you must send a content changed notification for 554 * {@link DocumentsContract#buildRootsUri(String)}. 555 * 556 * @see #COLUMN_FLAGS 557 * @see ContentResolver#notifyChange(Uri, 558 * android.database.ContentObserver, boolean) 559 * @hide 560 */ 561 public static final int FLAG_EMPTY = 1 << 16; 562 563 /** 564 * Flag indicating that this root should only be visible to advanced 565 * users. 566 * 567 * @see #COLUMN_FLAGS 568 * @hide 569 */ 570 public static final int FLAG_ADVANCED = 1 << 17; 571 572 /** 573 * Flag indicating that this root has settings. 574 * 575 * @see #COLUMN_FLAGS 576 * @see DocumentsContract#ACTION_DOCUMENT_ROOT_SETTINGS 577 * @hide 578 */ 579 public static final int FLAG_HAS_SETTINGS = 1 << 18; 580 581 /** 582 * Flag indicating that this root is on removable SD card storage. 583 * 584 * @see #COLUMN_FLAGS 585 * @hide 586 */ 587 public static final int FLAG_REMOVABLE_SD = 1 << 19; 588 589 /** 590 * Flag indicating that this root is on removable USB storage. 591 * 592 * @see #COLUMN_FLAGS 593 * @hide 594 */ 595 public static final int FLAG_REMOVABLE_USB = 1 << 20; 596 } 597 598 /** 599 * Optional boolean flag included in a directory {@link Cursor#getExtras()} 600 * indicating that a document provider is still loading data. For example, a 601 * provider has returned some results, but is still waiting on an 602 * outstanding network request. The provider must send a content changed 603 * notification when loading is finished. 604 * 605 * @see ContentResolver#notifyChange(Uri, android.database.ContentObserver, 606 * boolean) 607 */ 608 public static final String EXTRA_LOADING = "loading"; 609 610 /** 611 * Optional string included in a directory {@link Cursor#getExtras()} 612 * providing an informational message that should be shown to a user. For 613 * example, a provider may wish to indicate that not all documents are 614 * available. 615 */ 616 public static final String EXTRA_INFO = "info"; 617 618 /** 619 * Optional string included in a directory {@link Cursor#getExtras()} 620 * providing an error message that should be shown to a user. For example, a 621 * provider may wish to indicate that a network error occurred. The user may 622 * choose to retry, resulting in a new query. 623 */ 624 public static final String EXTRA_ERROR = "error"; 625 626 /** 627 * Optional result (I'm thinking boolean) answer to a question. 628 * {@hide} 629 */ 630 public static final String EXTRA_RESULT = "result"; 631 632 /** {@hide} */ 633 public static final String METHOD_CREATE_DOCUMENT = "android:createDocument"; 634 /** {@hide} */ 635 public static final String METHOD_RENAME_DOCUMENT = "android:renameDocument"; 636 /** {@hide} */ 637 public static final String METHOD_DELETE_DOCUMENT = "android:deleteDocument"; 638 /** {@hide} */ 639 public static final String METHOD_COPY_DOCUMENT = "android:copyDocument"; 640 /** {@hide} */ 641 public static final String METHOD_MOVE_DOCUMENT = "android:moveDocument"; 642 /** {@hide} */ 643 public static final String METHOD_IS_CHILD_DOCUMENT = "android:isChildDocument"; 644 /** {@hide} */ 645 public static final String METHOD_REMOVE_DOCUMENT = "android:removeDocument"; 646 647 /** {@hide} */ 648 public static final String EXTRA_PARENT_URI = "parentUri"; 649 /** {@hide} */ 650 public static final String EXTRA_URI = "uri"; 651 652 private static final String PATH_ROOT = "root"; 653 private static final String PATH_RECENT = "recent"; 654 private static final String PATH_DOCUMENT = "document"; 655 private static final String PATH_CHILDREN = "children"; 656 private static final String PATH_SEARCH = "search"; 657 private static final String PATH_TREE = "tree"; 658 659 private static final String PARAM_QUERY = "query"; 660 private static final String PARAM_MANAGE = "manage"; 661 662 /** 663 * Build URI representing the roots of a document provider. When queried, a 664 * provider will return one or more rows with columns defined by 665 * {@link Root}. 666 * 667 * @see DocumentsProvider#queryRoots(String[]) 668 */ 669 public static Uri buildRootsUri(String authority) { 670 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 671 .authority(authority).appendPath(PATH_ROOT).build(); 672 } 673 674 /** 675 * Build URI representing the given {@link Root#COLUMN_ROOT_ID} in a 676 * document provider. 677 * 678 * @see #getRootId(Uri) 679 */ 680 public static Uri buildRootUri(String authority, String rootId) { 681 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 682 .authority(authority).appendPath(PATH_ROOT).appendPath(rootId).build(); 683 } 684 685 /** 686 * Builds URI for user home directory on external (local) storage. 687 * {@hide} 688 */ 689 public static Uri buildHomeUri() { 690 // TODO: Avoid this type of interpackage copying. Added here to avoid 691 // direct coupling, but not ideal. 692 return DocumentsContract.buildRootUri("com.android.externalstorage.documents", "home"); 693 } 694 695 /** 696 * Build URI representing the recently modified documents of a specific root 697 * in a document provider. When queried, a provider will return zero or more 698 * rows with columns defined by {@link Document}. 699 * 700 * @see DocumentsProvider#queryRecentDocuments(String, String[]) 701 * @see #getRootId(Uri) 702 */ 703 public static Uri buildRecentDocumentsUri(String authority, String rootId) { 704 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 705 .authority(authority).appendPath(PATH_ROOT).appendPath(rootId) 706 .appendPath(PATH_RECENT).build(); 707 } 708 709 /** 710 * Build URI representing access to descendant documents of the given 711 * {@link Document#COLUMN_DOCUMENT_ID}. 712 * 713 * @see #getTreeDocumentId(Uri) 714 */ 715 public static Uri buildTreeDocumentUri(String authority, String documentId) { 716 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(authority) 717 .appendPath(PATH_TREE).appendPath(documentId).build(); 718 } 719 720 /** 721 * Build URI representing the target {@link Document#COLUMN_DOCUMENT_ID} in 722 * a document provider. When queried, a provider will return a single row 723 * with columns defined by {@link Document}. 724 * 725 * @see DocumentsProvider#queryDocument(String, String[]) 726 * @see #getDocumentId(Uri) 727 */ 728 public static Uri buildDocumentUri(String authority, String documentId) { 729 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 730 .authority(authority).appendPath(PATH_DOCUMENT).appendPath(documentId).build(); 731 } 732 733 /** 734 * Build URI representing the target {@link Document#COLUMN_DOCUMENT_ID} in 735 * a document provider. When queried, a provider will return a single row 736 * with columns defined by {@link Document}. 737 * <p> 738 * However, instead of directly accessing the target document, the returned 739 * URI will leverage access granted through a subtree URI, typically 740 * returned by {@link Intent#ACTION_OPEN_DOCUMENT_TREE}. The target document 741 * must be a descendant (child, grandchild, etc) of the subtree. 742 * <p> 743 * This is typically used to access documents under a user-selected 744 * directory tree, since it doesn't require the user to separately confirm 745 * each new document access. 746 * 747 * @param treeUri the subtree to leverage to gain access to the target 748 * document. The target directory must be a descendant of this 749 * subtree. 750 * @param documentId the target document, which the caller may not have 751 * direct access to. 752 * @see Intent#ACTION_OPEN_DOCUMENT_TREE 753 * @see DocumentsProvider#isChildDocument(String, String) 754 * @see #buildDocumentUri(String, String) 755 */ 756 public static Uri buildDocumentUriUsingTree(Uri treeUri, String documentId) { 757 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 758 .authority(treeUri.getAuthority()).appendPath(PATH_TREE) 759 .appendPath(getTreeDocumentId(treeUri)).appendPath(PATH_DOCUMENT) 760 .appendPath(documentId).build(); 761 } 762 763 /** {@hide} */ 764 public static Uri buildDocumentUriMaybeUsingTree(Uri baseUri, String documentId) { 765 if (isTreeUri(baseUri)) { 766 return buildDocumentUriUsingTree(baseUri, documentId); 767 } else { 768 return buildDocumentUri(baseUri.getAuthority(), documentId); 769 } 770 } 771 772 /** 773 * Build URI representing the children of the target directory in a document 774 * provider. When queried, a provider will return zero or more rows with 775 * columns defined by {@link Document}. 776 * 777 * @param parentDocumentId the document to return children for, which must 778 * be a directory with MIME type of 779 * {@link Document#MIME_TYPE_DIR}. 780 * @see DocumentsProvider#queryChildDocuments(String, String[], String) 781 * @see #getDocumentId(Uri) 782 */ 783 public static Uri buildChildDocumentsUri(String authority, String parentDocumentId) { 784 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(authority) 785 .appendPath(PATH_DOCUMENT).appendPath(parentDocumentId).appendPath(PATH_CHILDREN) 786 .build(); 787 } 788 789 /** 790 * Build URI representing the children of the target directory in a document 791 * provider. When queried, a provider will return zero or more rows with 792 * columns defined by {@link Document}. 793 * <p> 794 * However, instead of directly accessing the target directory, the returned 795 * URI will leverage access granted through a subtree URI, typically 796 * returned by {@link Intent#ACTION_OPEN_DOCUMENT_TREE}. The target 797 * directory must be a descendant (child, grandchild, etc) of the subtree. 798 * <p> 799 * This is typically used to access documents under a user-selected 800 * directory tree, since it doesn't require the user to separately confirm 801 * each new document access. 802 * 803 * @param treeUri the subtree to leverage to gain access to the target 804 * document. The target directory must be a descendant of this 805 * subtree. 806 * @param parentDocumentId the document to return children for, which the 807 * caller may not have direct access to, and which must be a 808 * directory with MIME type of {@link Document#MIME_TYPE_DIR}. 809 * @see Intent#ACTION_OPEN_DOCUMENT_TREE 810 * @see DocumentsProvider#isChildDocument(String, String) 811 * @see #buildChildDocumentsUri(String, String) 812 */ 813 public static Uri buildChildDocumentsUriUsingTree(Uri treeUri, String parentDocumentId) { 814 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT) 815 .authority(treeUri.getAuthority()).appendPath(PATH_TREE) 816 .appendPath(getTreeDocumentId(treeUri)).appendPath(PATH_DOCUMENT) 817 .appendPath(parentDocumentId).appendPath(PATH_CHILDREN).build(); 818 } 819 820 /** 821 * Build URI representing a search for matching documents under a specific 822 * root in a document provider. When queried, a provider will return zero or 823 * more rows with columns defined by {@link Document}. 824 * 825 * @see DocumentsProvider#querySearchDocuments(String, String, String[]) 826 * @see #getRootId(Uri) 827 * @see #getSearchDocumentsQuery(Uri) 828 */ 829 public static Uri buildSearchDocumentsUri( 830 String authority, String rootId, String query) { 831 return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority(authority) 832 .appendPath(PATH_ROOT).appendPath(rootId).appendPath(PATH_SEARCH) 833 .appendQueryParameter(PARAM_QUERY, query).build(); 834 } 835 836 /** 837 * Test if the given URI represents a {@link Document} backed by a 838 * {@link DocumentsProvider}. 839 * 840 * @see #buildDocumentUri(String, String) 841 * @see #buildDocumentUriUsingTree(Uri, String) 842 */ 843 public static boolean isDocumentUri(Context context, @Nullable Uri uri) { 844 if (isContentUri(uri) && isDocumentsProvider(context, uri.getAuthority())) { 845 final List<String> paths = uri.getPathSegments(); 846 if (paths.size() == 2) { 847 return PATH_DOCUMENT.equals(paths.get(0)); 848 } else if (paths.size() == 4) { 849 return PATH_TREE.equals(paths.get(0)) && PATH_DOCUMENT.equals(paths.get(2)); 850 } 851 } 852 return false; 853 } 854 855 /** {@hide} */ 856 public static boolean isRootUri(Context context, @Nullable Uri uri) { 857 if (isContentUri(uri) && isDocumentsProvider(context, uri.getAuthority())) { 858 final List<String> paths = uri.getPathSegments(); 859 return (paths.size() == 2 && PATH_ROOT.equals(paths.get(0))); 860 } 861 return false; 862 } 863 864 /** {@hide} */ 865 public static boolean isContentUri(@Nullable Uri uri) { 866 return uri != null && ContentResolver.SCHEME_CONTENT.equals(uri.getScheme()); 867 } 868 869 /** 870 * Test if the given URI represents a {@link Document} tree. 871 * 872 * @see #buildTreeDocumentUri(String, String) 873 * @see #getTreeDocumentId(Uri, String) 874 */ 875 public static boolean isTreeUri(Uri uri) { 876 final List<String> paths = uri.getPathSegments(); 877 return (paths.size() >= 2 && PATH_TREE.equals(paths.get(0))); 878 } 879 880 private static boolean isDocumentsProvider(Context context, String authority) { 881 final Intent intent = new Intent(PROVIDER_INTERFACE); 882 final List<ResolveInfo> infos = context.getPackageManager() 883 .queryIntentContentProviders(intent, 0); 884 for (ResolveInfo info : infos) { 885 if (authority.equals(info.providerInfo.authority)) { 886 return true; 887 } 888 } 889 return false; 890 } 891 892 /** 893 * Extract the {@link Root#COLUMN_ROOT_ID} from the given URI. 894 */ 895 public static String getRootId(Uri rootUri) { 896 final List<String> paths = rootUri.getPathSegments(); 897 if (paths.size() >= 2 && PATH_ROOT.equals(paths.get(0))) { 898 return paths.get(1); 899 } 900 throw new IllegalArgumentException("Invalid URI: " + rootUri); 901 } 902 903 /** 904 * Extract the {@link Document#COLUMN_DOCUMENT_ID} from the given URI. 905 * 906 * @see #isDocumentUri(Context, Uri) 907 */ 908 public static String getDocumentId(Uri documentUri) { 909 final List<String> paths = documentUri.getPathSegments(); 910 if (paths.size() >= 2 && PATH_DOCUMENT.equals(paths.get(0))) { 911 return paths.get(1); 912 } 913 if (paths.size() >= 4 && PATH_TREE.equals(paths.get(0)) 914 && PATH_DOCUMENT.equals(paths.get(2))) { 915 return paths.get(3); 916 } 917 throw new IllegalArgumentException("Invalid URI: " + documentUri); 918 } 919 920 /** 921 * Extract the via {@link Document#COLUMN_DOCUMENT_ID} from the given URI. 922 */ 923 public static String getTreeDocumentId(Uri documentUri) { 924 final List<String> paths = documentUri.getPathSegments(); 925 if (paths.size() >= 2 && PATH_TREE.equals(paths.get(0))) { 926 return paths.get(1); 927 } 928 throw new IllegalArgumentException("Invalid URI: " + documentUri); 929 } 930 931 /** 932 * Extract the search query from a URI built by 933 * {@link #buildSearchDocumentsUri(String, String, String)}. 934 */ 935 public static String getSearchDocumentsQuery(Uri searchDocumentsUri) { 936 return searchDocumentsUri.getQueryParameter(PARAM_QUERY); 937 } 938 939 /** {@hide} */ 940 public static Uri setManageMode(Uri uri) { 941 return uri.buildUpon().appendQueryParameter(PARAM_MANAGE, "true").build(); 942 } 943 944 /** {@hide} */ 945 public static boolean isManageMode(Uri uri) { 946 return uri.getBooleanQueryParameter(PARAM_MANAGE, false); 947 } 948 949 /** 950 * Return thumbnail representing the document at the given URI. Callers are 951 * responsible for their own in-memory caching. 952 * 953 * @param documentUri document to return thumbnail for, which must have 954 * {@link Document#FLAG_SUPPORTS_THUMBNAIL} set. 955 * @param size optimal thumbnail size desired. A provider may return a 956 * thumbnail of a different size, but never more than double the 957 * requested size. 958 * @param signal signal used to indicate if caller is no longer interested 959 * in the thumbnail. 960 * @return decoded thumbnail, or {@code null} if problem was encountered. 961 * @see DocumentsProvider#openDocumentThumbnail(String, Point, 962 * android.os.CancellationSignal) 963 */ 964 public static Bitmap getDocumentThumbnail( 965 ContentResolver resolver, Uri documentUri, Point size, CancellationSignal signal) { 966 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 967 documentUri.getAuthority()); 968 try { 969 return getDocumentThumbnail(client, documentUri, size, signal); 970 } catch (Exception e) { 971 if (!(e instanceof OperationCanceledException)) { 972 Log.w(TAG, "Failed to load thumbnail for " + documentUri + ": " + e); 973 } 974 return null; 975 } finally { 976 ContentProviderClient.releaseQuietly(client); 977 } 978 } 979 980 /** {@hide} */ 981 public static Bitmap getDocumentThumbnail( 982 ContentProviderClient client, Uri documentUri, Point size, CancellationSignal signal) 983 throws RemoteException, IOException { 984 final Bundle openOpts = new Bundle(); 985 openOpts.putParcelable(ContentResolver.EXTRA_SIZE, size); 986 987 AssetFileDescriptor afd = null; 988 Bitmap bitmap = null; 989 try { 990 afd = client.openTypedAssetFileDescriptor(documentUri, "image/*", openOpts, signal); 991 992 final FileDescriptor fd = afd.getFileDescriptor(); 993 final long offset = afd.getStartOffset(); 994 995 // Try seeking on the returned FD, since it gives us the most 996 // optimal decode path; otherwise fall back to buffering. 997 BufferedInputStream is = null; 998 try { 999 Os.lseek(fd, offset, SEEK_SET); 1000 } catch (ErrnoException e) { 1001 is = new BufferedInputStream(new FileInputStream(fd), THUMBNAIL_BUFFER_SIZE); 1002 is.mark(THUMBNAIL_BUFFER_SIZE); 1003 } 1004 1005 // We requested a rough thumbnail size, but the remote size may have 1006 // returned something giant, so defensively scale down as needed. 1007 final BitmapFactory.Options opts = new BitmapFactory.Options(); 1008 opts.inJustDecodeBounds = true; 1009 if (is != null) { 1010 BitmapFactory.decodeStream(is, null, opts); 1011 } else { 1012 BitmapFactory.decodeFileDescriptor(fd, null, opts); 1013 } 1014 1015 final int widthSample = opts.outWidth / size.x; 1016 final int heightSample = opts.outHeight / size.y; 1017 1018 opts.inJustDecodeBounds = false; 1019 opts.inSampleSize = Math.min(widthSample, heightSample); 1020 if (is != null) { 1021 is.reset(); 1022 bitmap = BitmapFactory.decodeStream(is, null, opts); 1023 } else { 1024 try { 1025 Os.lseek(fd, offset, SEEK_SET); 1026 } catch (ErrnoException e) { 1027 e.rethrowAsIOException(); 1028 } 1029 bitmap = BitmapFactory.decodeFileDescriptor(fd, null, opts); 1030 } 1031 1032 // Transform the bitmap if requested. We use a side-channel to 1033 // communicate the orientation, since EXIF thumbnails don't contain 1034 // the rotation flags of the original image. 1035 final Bundle extras = afd.getExtras(); 1036 final int orientation = (extras != null) ? extras.getInt(EXTRA_ORIENTATION, 0) : 0; 1037 if (orientation != 0) { 1038 final int width = bitmap.getWidth(); 1039 final int height = bitmap.getHeight(); 1040 1041 final Matrix m = new Matrix(); 1042 m.setRotate(orientation, width / 2, height / 2); 1043 bitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, m, false); 1044 } 1045 } finally { 1046 IoUtils.closeQuietly(afd); 1047 } 1048 1049 return bitmap; 1050 } 1051 1052 /** 1053 * Create a new document with given MIME type and display name. 1054 * 1055 * @param parentDocumentUri directory with 1056 * {@link Document#FLAG_DIR_SUPPORTS_CREATE} 1057 * @param mimeType MIME type of new document 1058 * @param displayName name of new document 1059 * @return newly created document, or {@code null} if failed 1060 */ 1061 public static Uri createDocument(ContentResolver resolver, Uri parentDocumentUri, 1062 String mimeType, String displayName) { 1063 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 1064 parentDocumentUri.getAuthority()); 1065 try { 1066 return createDocument(client, parentDocumentUri, mimeType, displayName); 1067 } catch (Exception e) { 1068 Log.w(TAG, "Failed to create document", e); 1069 return null; 1070 } finally { 1071 ContentProviderClient.releaseQuietly(client); 1072 } 1073 } 1074 1075 /** {@hide} */ 1076 public static Uri createDocument(ContentProviderClient client, Uri parentDocumentUri, 1077 String mimeType, String displayName) throws RemoteException { 1078 final Bundle in = new Bundle(); 1079 in.putParcelable(DocumentsContract.EXTRA_URI, parentDocumentUri); 1080 in.putString(Document.COLUMN_MIME_TYPE, mimeType); 1081 in.putString(Document.COLUMN_DISPLAY_NAME, displayName); 1082 1083 final Bundle out = client.call(METHOD_CREATE_DOCUMENT, null, in); 1084 return out.getParcelable(DocumentsContract.EXTRA_URI); 1085 } 1086 1087 /** {@hide} */ 1088 public static boolean isChildDocument(ContentProviderClient client, Uri parentDocumentUri, 1089 Uri childDocumentUri) throws RemoteException { 1090 1091 final Bundle in = new Bundle(); 1092 in.putParcelable(DocumentsContract.EXTRA_URI, parentDocumentUri); 1093 in.putParcelable(DocumentsContract.EXTRA_TARGET_URI, childDocumentUri); 1094 1095 final Bundle out = client.call(METHOD_IS_CHILD_DOCUMENT, null, in); 1096 if (out == null) { 1097 throw new RemoteException("Failed to get a reponse from isChildDocument query."); 1098 } 1099 if (!out.containsKey(DocumentsContract.EXTRA_RESULT)) { 1100 throw new RemoteException("Response did not include result field.."); 1101 } 1102 return out.getBoolean(DocumentsContract.EXTRA_RESULT); 1103 } 1104 1105 /** 1106 * Change the display name of an existing document. 1107 * <p> 1108 * If the underlying provider needs to create a new 1109 * {@link Document#COLUMN_DOCUMENT_ID} to represent the updated display 1110 * name, that new document is returned and the original document is no 1111 * longer valid. Otherwise, the original document is returned. 1112 * 1113 * @param documentUri document with {@link Document#FLAG_SUPPORTS_RENAME} 1114 * @param displayName updated name for document 1115 * @return the existing or new document after the rename, or {@code null} if 1116 * failed. 1117 */ 1118 public static Uri renameDocument(ContentResolver resolver, Uri documentUri, 1119 String displayName) { 1120 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 1121 documentUri.getAuthority()); 1122 try { 1123 return renameDocument(client, documentUri, displayName); 1124 } catch (Exception e) { 1125 Log.w(TAG, "Failed to rename document", e); 1126 return null; 1127 } finally { 1128 ContentProviderClient.releaseQuietly(client); 1129 } 1130 } 1131 1132 /** {@hide} */ 1133 public static Uri renameDocument(ContentProviderClient client, Uri documentUri, 1134 String displayName) throws RemoteException { 1135 final Bundle in = new Bundle(); 1136 in.putParcelable(DocumentsContract.EXTRA_URI, documentUri); 1137 in.putString(Document.COLUMN_DISPLAY_NAME, displayName); 1138 1139 final Bundle out = client.call(METHOD_RENAME_DOCUMENT, null, in); 1140 final Uri outUri = out.getParcelable(DocumentsContract.EXTRA_URI); 1141 return (outUri != null) ? outUri : documentUri; 1142 } 1143 1144 /** 1145 * Delete the given document. 1146 * 1147 * @param documentUri document with {@link Document#FLAG_SUPPORTS_DELETE} 1148 * @return if the document was deleted successfully. 1149 */ 1150 public static boolean deleteDocument(ContentResolver resolver, Uri documentUri) { 1151 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 1152 documentUri.getAuthority()); 1153 try { 1154 deleteDocument(client, documentUri); 1155 return true; 1156 } catch (Exception e) { 1157 Log.w(TAG, "Failed to delete document", e); 1158 return false; 1159 } finally { 1160 ContentProviderClient.releaseQuietly(client); 1161 } 1162 } 1163 1164 /** {@hide} */ 1165 public static void deleteDocument(ContentProviderClient client, Uri documentUri) 1166 throws RemoteException { 1167 final Bundle in = new Bundle(); 1168 in.putParcelable(DocumentsContract.EXTRA_URI, documentUri); 1169 1170 client.call(METHOD_DELETE_DOCUMENT, null, in); 1171 } 1172 1173 /** 1174 * Copies the given document. 1175 * 1176 * @param sourceDocumentUri document with {@link Document#FLAG_SUPPORTS_COPY} 1177 * @param targetParentDocumentUri document which will become a parent of the source 1178 * document's copy. 1179 * @return the copied document, or {@code null} if failed. 1180 */ 1181 public static Uri copyDocument(ContentResolver resolver, Uri sourceDocumentUri, 1182 Uri targetParentDocumentUri) { 1183 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 1184 sourceDocumentUri.getAuthority()); 1185 try { 1186 return copyDocument(client, sourceDocumentUri, targetParentDocumentUri); 1187 } catch (Exception e) { 1188 Log.w(TAG, "Failed to copy document", e); 1189 return null; 1190 } finally { 1191 ContentProviderClient.releaseQuietly(client); 1192 } 1193 } 1194 1195 /** {@hide} */ 1196 public static Uri copyDocument(ContentProviderClient client, Uri sourceDocumentUri, 1197 Uri targetParentDocumentUri) throws RemoteException { 1198 final Bundle in = new Bundle(); 1199 in.putParcelable(DocumentsContract.EXTRA_URI, sourceDocumentUri); 1200 in.putParcelable(DocumentsContract.EXTRA_TARGET_URI, targetParentDocumentUri); 1201 1202 final Bundle out = client.call(METHOD_COPY_DOCUMENT, null, in); 1203 return out.getParcelable(DocumentsContract.EXTRA_URI); 1204 } 1205 1206 /** 1207 * Moves the given document under a new parent. 1208 * 1209 * @param sourceDocumentUri document with {@link Document#FLAG_SUPPORTS_MOVE} 1210 * @param sourceParentDocumentUri parent document of the document to move. 1211 * @param targetParentDocumentUri document which will become a new parent of the source 1212 * document. 1213 * @return the moved document, or {@code null} if failed. 1214 */ 1215 public static Uri moveDocument(ContentResolver resolver, Uri sourceDocumentUri, 1216 Uri sourceParentDocumentUri, Uri targetParentDocumentUri) { 1217 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 1218 sourceDocumentUri.getAuthority()); 1219 try { 1220 return moveDocument(client, sourceDocumentUri, sourceParentDocumentUri, 1221 targetParentDocumentUri); 1222 } catch (Exception e) { 1223 Log.w(TAG, "Failed to move document", e); 1224 return null; 1225 } finally { 1226 ContentProviderClient.releaseQuietly(client); 1227 } 1228 } 1229 1230 /** {@hide} */ 1231 public static Uri moveDocument(ContentProviderClient client, Uri sourceDocumentUri, 1232 Uri sourceParentDocumentUri, Uri targetParentDocumentUri) throws RemoteException { 1233 final Bundle in = new Bundle(); 1234 in.putParcelable(DocumentsContract.EXTRA_URI, sourceDocumentUri); 1235 in.putParcelable(DocumentsContract.EXTRA_PARENT_URI, sourceParentDocumentUri); 1236 in.putParcelable(DocumentsContract.EXTRA_TARGET_URI, targetParentDocumentUri); 1237 1238 final Bundle out = client.call(METHOD_MOVE_DOCUMENT, null, in); 1239 return out.getParcelable(DocumentsContract.EXTRA_URI); 1240 } 1241 1242 /** 1243 * Removes the given document from a parent directory. 1244 * 1245 * <p>In contrast to {@link #deleteDocument} it requires specifying the parent. 1246 * This method is especially useful if the document can be in multiple parents. 1247 * 1248 * @param documentUri document with {@link Document#FLAG_SUPPORTS_REMOVE} 1249 * @param parentDocumentUri parent document of the document to remove. 1250 * @return true if the document was removed successfully. 1251 */ 1252 public static boolean removeDocument(ContentResolver resolver, Uri documentUri, 1253 Uri parentDocumentUri) { 1254 final ContentProviderClient client = resolver.acquireUnstableContentProviderClient( 1255 documentUri.getAuthority()); 1256 try { 1257 removeDocument(client, documentUri, parentDocumentUri); 1258 return true; 1259 } catch (Exception e) { 1260 Log.w(TAG, "Failed to remove document", e); 1261 return false; 1262 } finally { 1263 ContentProviderClient.releaseQuietly(client); 1264 } 1265 } 1266 1267 /** {@hide} */ 1268 public static void removeDocument(ContentProviderClient client, Uri documentUri, 1269 Uri parentDocumentUri) throws RemoteException { 1270 final Bundle in = new Bundle(); 1271 in.putParcelable(DocumentsContract.EXTRA_URI, documentUri); 1272 in.putParcelable(DocumentsContract.EXTRA_PARENT_URI, parentDocumentUri); 1273 1274 client.call(METHOD_REMOVE_DOCUMENT, null, in); 1275 } 1276 1277 /** 1278 * Open the given image for thumbnail purposes, using any embedded EXIF 1279 * thumbnail if available, and providing orientation hints from the parent 1280 * image. 1281 * 1282 * @hide 1283 */ 1284 public static AssetFileDescriptor openImageThumbnail(File file) throws FileNotFoundException { 1285 final ParcelFileDescriptor pfd = ParcelFileDescriptor.open( 1286 file, ParcelFileDescriptor.MODE_READ_ONLY); 1287 Bundle extras = null; 1288 1289 try { 1290 final ExifInterface exif = new ExifInterface(file.getAbsolutePath()); 1291 1292 switch (exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, -1)) { 1293 case ExifInterface.ORIENTATION_ROTATE_90: 1294 extras = new Bundle(1); 1295 extras.putInt(EXTRA_ORIENTATION, 90); 1296 break; 1297 case ExifInterface.ORIENTATION_ROTATE_180: 1298 extras = new Bundle(1); 1299 extras.putInt(EXTRA_ORIENTATION, 180); 1300 break; 1301 case ExifInterface.ORIENTATION_ROTATE_270: 1302 extras = new Bundle(1); 1303 extras.putInt(EXTRA_ORIENTATION, 270); 1304 break; 1305 } 1306 1307 final long[] thumb = exif.getThumbnailRange(); 1308 if (thumb != null) { 1309 return new AssetFileDescriptor(pfd, thumb[0], thumb[1], extras); 1310 } 1311 } catch (IOException e) { 1312 } 1313 1314 return new AssetFileDescriptor(pfd, 0, AssetFileDescriptor.UNKNOWN_LENGTH, extras); 1315 } 1316 } 1317
