1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.media; 17 18 import android.annotation.NonNull; 19 import android.annotation.StringDef; 20 import android.content.ContentResolver; 21 import android.graphics.Bitmap; 22 import android.graphics.BitmapFactory; 23 import android.media.browse.MediaBrowser; 24 import android.media.session.MediaController; 25 import android.net.Uri; 26 import android.os.Bundle; 27 import android.os.Parcel; 28 import android.os.Parcelable; 29 import android.text.TextUtils; 30 import android.util.ArrayMap; 31 import android.util.Log; 32 import android.util.SparseArray; 33 34 import java.lang.annotation.Retention; 35 import java.lang.annotation.RetentionPolicy; 36 import java.util.Set; 37 38 /** 39 * Contains metadata about an item, such as the title, artist, etc. 40 */ 41 public final class MediaMetadata implements Parcelable { 42 private static final String TAG = "MediaMetadata"; 43 44 /** 45 * @hide 46 */ 47 @StringDef({METADATA_KEY_TITLE, METADATA_KEY_ARTIST, METADATA_KEY_ALBUM, METADATA_KEY_AUTHOR, 48 METADATA_KEY_WRITER, METADATA_KEY_COMPOSER, METADATA_KEY_COMPILATION, 49 METADATA_KEY_DATE, METADATA_KEY_GENRE, METADATA_KEY_ALBUM_ARTIST, METADATA_KEY_ART_URI, 50 METADATA_KEY_ALBUM_ART_URI, METADATA_KEY_DISPLAY_TITLE, METADATA_KEY_DISPLAY_SUBTITLE, 51 METADATA_KEY_DISPLAY_DESCRIPTION, METADATA_KEY_DISPLAY_ICON_URI, 52 METADATA_KEY_MEDIA_ID}) 53 @Retention(RetentionPolicy.SOURCE) 54 public @interface TextKey {} 55 56 /** 57 * @hide 58 */ 59 @StringDef({METADATA_KEY_DURATION, METADATA_KEY_YEAR, METADATA_KEY_TRACK_NUMBER, 60 METADATA_KEY_NUM_TRACKS, METADATA_KEY_DISC_NUMBER}) 61 @Retention(RetentionPolicy.SOURCE) 62 public @interface LongKey {} 63 64 /** 65 * @hide 66 */ 67 @StringDef({METADATA_KEY_ART, METADATA_KEY_ALBUM_ART, METADATA_KEY_DISPLAY_ICON}) 68 @Retention(RetentionPolicy.SOURCE) 69 public @interface BitmapKey {} 70 71 /** 72 * @hide 73 */ 74 @StringDef({METADATA_KEY_USER_RATING, METADATA_KEY_RATING}) 75 @Retention(RetentionPolicy.SOURCE) 76 public @interface RatingKey {} 77 78 /** 79 * The title of the media. 80 */ 81 public static final String METADATA_KEY_TITLE = "android.media.metadata.TITLE"; 82 83 /** 84 * The artist of the media. 85 */ 86 public static final String METADATA_KEY_ARTIST = "android.media.metadata.ARTIST"; 87 88 /** 89 * The duration of the media in ms. A negative duration indicates that the 90 * duration is unknown (or infinite). 91 */ 92 public static final String METADATA_KEY_DURATION = "android.media.metadata.DURATION"; 93 94 /** 95 * The album title for the media. 96 */ 97 public static final String METADATA_KEY_ALBUM = "android.media.metadata.ALBUM"; 98 99 /** 100 * The author of the media. 101 */ 102 public static final String METADATA_KEY_AUTHOR = "android.media.metadata.AUTHOR"; 103 104 /** 105 * The writer of the media. 106 */ 107 public static final String METADATA_KEY_WRITER = "android.media.metadata.WRITER"; 108 109 /** 110 * The composer of the media. 111 */ 112 public static final String METADATA_KEY_COMPOSER = "android.media.metadata.COMPOSER"; 113 114 /** 115 * The compilation status of the media. 116 */ 117 public static final String METADATA_KEY_COMPILATION = "android.media.metadata.COMPILATION"; 118 119 /** 120 * The date the media was created or published. The format is unspecified 121 * but RFC 3339 is recommended. 122 */ 123 public static final String METADATA_KEY_DATE = "android.media.metadata.DATE"; 124 125 /** 126 * The year the media was created or published as a long. 127 */ 128 public static final String METADATA_KEY_YEAR = "android.media.metadata.YEAR"; 129 130 /** 131 * The genre of the media. 132 */ 133 public static final String METADATA_KEY_GENRE = "android.media.metadata.GENRE"; 134 135 /** 136 * The track number for the media. 137 */ 138 public static final String METADATA_KEY_TRACK_NUMBER = "android.media.metadata.TRACK_NUMBER"; 139 140 /** 141 * The number of tracks in the media's original source. 142 */ 143 public static final String METADATA_KEY_NUM_TRACKS = "android.media.metadata.NUM_TRACKS"; 144 145 /** 146 * The disc number for the media's original source. 147 */ 148 public static final String METADATA_KEY_DISC_NUMBER = "android.media.metadata.DISC_NUMBER"; 149 150 /** 151 * The artist for the album of the media's original source. 152 */ 153 public static final String METADATA_KEY_ALBUM_ARTIST = "android.media.metadata.ALBUM_ARTIST"; 154 155 /** 156 * The artwork for the media as a {@link Bitmap}. 157 * <p> 158 * The artwork should be relatively small and may be scaled down by the 159 * system if it is too large. For higher resolution artwork 160 * {@link #METADATA_KEY_ART_URI} should be used instead. 161 */ 162 public static final String METADATA_KEY_ART = "android.media.metadata.ART"; 163 164 /** 165 * The artwork for the media as a Uri formatted String. The artwork can be 166 * loaded using a combination of {@link ContentResolver#openInputStream} and 167 * {@link BitmapFactory#decodeStream}. 168 * <p> 169 * For the best results, Uris should use the content:// style and support 170 * {@link ContentResolver#EXTRA_SIZE} for retrieving scaled artwork through 171 * {@link ContentResolver#openTypedAssetFileDescriptor(Uri, String, Bundle)}. 172 */ 173 public static final String METADATA_KEY_ART_URI = "android.media.metadata.ART_URI"; 174 175 /** 176 * The artwork for the album of the media's original source as a 177 * {@link Bitmap}. 178 * <p> 179 * The artwork should be relatively small and may be scaled down by the 180 * system if it is too large. For higher resolution artwork 181 * {@link #METADATA_KEY_ALBUM_ART_URI} should be used instead. 182 */ 183 public static final String METADATA_KEY_ALBUM_ART = "android.media.metadata.ALBUM_ART"; 184 185 /** 186 * The artwork for the album of the media's original source as a Uri 187 * formatted String. The artwork can be loaded using a combination of 188 * {@link ContentResolver#openInputStream} and 189 * {@link BitmapFactory#decodeStream}. 190 * <p> 191 * For the best results, Uris should use the content:// style and support 192 * {@link ContentResolver#EXTRA_SIZE} for retrieving scaled artwork through 193 * {@link ContentResolver#openTypedAssetFileDescriptor(Uri, String, Bundle)}. 194 */ 195 public static final String METADATA_KEY_ALBUM_ART_URI = "android.media.metadata.ALBUM_ART_URI"; 196 197 /** 198 * The user's rating for the media. 199 * 200 * @see Rating 201 */ 202 public static final String METADATA_KEY_USER_RATING = "android.media.metadata.USER_RATING"; 203 204 /** 205 * The overall rating for the media. 206 * 207 * @see Rating 208 */ 209 public static final String METADATA_KEY_RATING = "android.media.metadata.RATING"; 210 211 /** 212 * A title that is suitable for display to the user. This will generally be 213 * the same as {@link #METADATA_KEY_TITLE} but may differ for some formats. 214 * When displaying media described by this metadata this should be preferred 215 * if present. 216 */ 217 public static final String METADATA_KEY_DISPLAY_TITLE = "android.media.metadata.DISPLAY_TITLE"; 218 219 /** 220 * A subtitle that is suitable for display to the user. When displaying a 221 * second line for media described by this metadata this should be preferred 222 * to other fields if present. 223 */ 224 public static final String METADATA_KEY_DISPLAY_SUBTITLE 225 = "android.media.metadata.DISPLAY_SUBTITLE"; 226 227 /** 228 * A description that is suitable for display to the user. When displaying 229 * more information for media described by this metadata this should be 230 * preferred to other fields if present. 231 */ 232 public static final String METADATA_KEY_DISPLAY_DESCRIPTION 233 = "android.media.metadata.DISPLAY_DESCRIPTION"; 234 235 /** 236 * An icon or thumbnail that is suitable for display to the user. When 237 * displaying an icon for media described by this metadata this should be 238 * preferred to other fields if present. This must be a {@link Bitmap}. 239 * <p> 240 * The icon should be relatively small and may be scaled down by the system 241 * if it is too large. For higher resolution artwork 242 * {@link #METADATA_KEY_DISPLAY_ICON_URI} should be used instead. 243 */ 244 public static final String METADATA_KEY_DISPLAY_ICON 245 = "android.media.metadata.DISPLAY_ICON"; 246 247 /** 248 * A Uri formatted String for an icon or thumbnail that is suitable for 249 * display to the user. When displaying more information for media described 250 * by this metadata the display description should be preferred to other 251 * fields when present. The icon can be loaded using a combination of 252 * {@link ContentResolver#openInputStream} and 253 * {@link BitmapFactory#decodeStream}. 254 * <p> 255 * For the best results, Uris should use the content:// style and support 256 * {@link ContentResolver#EXTRA_SIZE} for retrieving scaled artwork through 257 * {@link ContentResolver#openTypedAssetFileDescriptor(Uri, String, Bundle)}. 258 */ 259 public static final String METADATA_KEY_DISPLAY_ICON_URI 260 = "android.media.metadata.DISPLAY_ICON_URI"; 261 262 /** 263 * A String key for identifying the content. This value is specific to the 264 * service providing the content. If used, this should be a persistent 265 * unique key for the underlying content. It may be used with 266 * {@link MediaController.TransportControls#playFromMediaId(String, Bundle)} 267 * to initiate playback when provided by a {@link MediaBrowser} connected to 268 * the same app. 269 */ 270 public static final String METADATA_KEY_MEDIA_ID = "android.media.metadata.MEDIA_ID"; 271 272 private static final @TextKey String[] PREFERRED_DESCRIPTION_ORDER = { 273 METADATA_KEY_TITLE, 274 METADATA_KEY_ARTIST, 275 METADATA_KEY_ALBUM, 276 METADATA_KEY_ALBUM_ARTIST, 277 METADATA_KEY_WRITER, 278 METADATA_KEY_AUTHOR, 279 METADATA_KEY_COMPOSER 280 }; 281 282 private static final @BitmapKey String[] PREFERRED_BITMAP_ORDER = { 283 METADATA_KEY_DISPLAY_ICON, 284 METADATA_KEY_ART, 285 METADATA_KEY_ALBUM_ART 286 }; 287 288 private static final @TextKey String[] PREFERRED_URI_ORDER = { 289 METADATA_KEY_DISPLAY_ICON_URI, 290 METADATA_KEY_ART_URI, 291 METADATA_KEY_ALBUM_ART_URI 292 }; 293 294 private static final int METADATA_TYPE_INVALID = -1; 295 private static final int METADATA_TYPE_LONG = 0; 296 private static final int METADATA_TYPE_TEXT = 1; 297 private static final int METADATA_TYPE_BITMAP = 2; 298 private static final int METADATA_TYPE_RATING = 3; 299 private static final ArrayMap<String, Integer> METADATA_KEYS_TYPE; 300 301 static { 302 METADATA_KEYS_TYPE = new ArrayMap<String, Integer>(); 303 METADATA_KEYS_TYPE.put(METADATA_KEY_TITLE, METADATA_TYPE_TEXT); 304 METADATA_KEYS_TYPE.put(METADATA_KEY_ARTIST, METADATA_TYPE_TEXT); 305 METADATA_KEYS_TYPE.put(METADATA_KEY_DURATION, METADATA_TYPE_LONG); 306 METADATA_KEYS_TYPE.put(METADATA_KEY_ALBUM, METADATA_TYPE_TEXT); 307 METADATA_KEYS_TYPE.put(METADATA_KEY_AUTHOR, METADATA_TYPE_TEXT); 308 METADATA_KEYS_TYPE.put(METADATA_KEY_WRITER, METADATA_TYPE_TEXT); 309 METADATA_KEYS_TYPE.put(METADATA_KEY_COMPOSER, METADATA_TYPE_TEXT); 310 METADATA_KEYS_TYPE.put(METADATA_KEY_COMPILATION, METADATA_TYPE_TEXT); 311 METADATA_KEYS_TYPE.put(METADATA_KEY_DATE, METADATA_TYPE_TEXT); 312 METADATA_KEYS_TYPE.put(METADATA_KEY_YEAR, METADATA_TYPE_LONG); 313 METADATA_KEYS_TYPE.put(METADATA_KEY_GENRE, METADATA_TYPE_TEXT); 314 METADATA_KEYS_TYPE.put(METADATA_KEY_TRACK_NUMBER, METADATA_TYPE_LONG); 315 METADATA_KEYS_TYPE.put(METADATA_KEY_NUM_TRACKS, METADATA_TYPE_LONG); 316 METADATA_KEYS_TYPE.put(METADATA_KEY_DISC_NUMBER, METADATA_TYPE_LONG); 317 METADATA_KEYS_TYPE.put(METADATA_KEY_ALBUM_ARTIST, METADATA_TYPE_TEXT); 318 METADATA_KEYS_TYPE.put(METADATA_KEY_ART, METADATA_TYPE_BITMAP); 319 METADATA_KEYS_TYPE.put(METADATA_KEY_ART_URI, METADATA_TYPE_TEXT); 320 METADATA_KEYS_TYPE.put(METADATA_KEY_ALBUM_ART, METADATA_TYPE_BITMAP); 321 METADATA_KEYS_TYPE.put(METADATA_KEY_ALBUM_ART_URI, METADATA_TYPE_TEXT); 322 METADATA_KEYS_TYPE.put(METADATA_KEY_USER_RATING, METADATA_TYPE_RATING); 323 METADATA_KEYS_TYPE.put(METADATA_KEY_RATING, METADATA_TYPE_RATING); 324 METADATA_KEYS_TYPE.put(METADATA_KEY_DISPLAY_TITLE, METADATA_TYPE_TEXT); 325 METADATA_KEYS_TYPE.put(METADATA_KEY_DISPLAY_SUBTITLE, METADATA_TYPE_TEXT); 326 METADATA_KEYS_TYPE.put(METADATA_KEY_DISPLAY_DESCRIPTION, METADATA_TYPE_TEXT); 327 METADATA_KEYS_TYPE.put(METADATA_KEY_DISPLAY_ICON, METADATA_TYPE_BITMAP); 328 METADATA_KEYS_TYPE.put(METADATA_KEY_DISPLAY_ICON_URI, METADATA_TYPE_TEXT); 329 } 330 331 private static final SparseArray<String> EDITOR_KEY_MAPPING; 332 333 static { 334 EDITOR_KEY_MAPPING = new SparseArray<String>(); 335 EDITOR_KEY_MAPPING.put(MediaMetadataEditor.BITMAP_KEY_ARTWORK, METADATA_KEY_ART); 336 EDITOR_KEY_MAPPING.put(MediaMetadataEditor.RATING_KEY_BY_OTHERS, METADATA_KEY_RATING); 337 EDITOR_KEY_MAPPING.put(MediaMetadataEditor.RATING_KEY_BY_USER, METADATA_KEY_USER_RATING); 338 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_ALBUM, METADATA_KEY_ALBUM); 339 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_ALBUMARTIST, 340 METADATA_KEY_ALBUM_ARTIST); 341 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_ARTIST, METADATA_KEY_ARTIST); 342 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_AUTHOR, METADATA_KEY_AUTHOR); 343 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_CD_TRACK_NUMBER, 344 METADATA_KEY_TRACK_NUMBER); 345 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_COMPOSER, METADATA_KEY_COMPOSER); 346 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_COMPILATION, 347 METADATA_KEY_COMPILATION); 348 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_DATE, METADATA_KEY_DATE); 349 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_DISC_NUMBER, 350 METADATA_KEY_DISC_NUMBER); 351 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_DURATION, METADATA_KEY_DURATION); 352 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_GENRE, METADATA_KEY_GENRE); 353 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_NUM_TRACKS, 354 METADATA_KEY_NUM_TRACKS); 355 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_TITLE, METADATA_KEY_TITLE); 356 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_WRITER, METADATA_KEY_WRITER); 357 EDITOR_KEY_MAPPING.put(MediaMetadataRetriever.METADATA_KEY_YEAR, METADATA_KEY_YEAR); 358 } 359 360 private final Bundle mBundle; 361 private MediaDescription mDescription; 362 363 private MediaMetadata(Bundle bundle) { 364 mBundle = new Bundle(bundle); 365 } 366 367 private MediaMetadata(Parcel in) { 368 mBundle = Bundle.setDefusable(in.readBundle(), true); 369 } 370 371 /** 372 * Returns true if the given key is contained in the metadata 373 * 374 * @param key a String key 375 * @return true if the key exists in this metadata, false otherwise 376 */ 377 public boolean containsKey(String key) { 378 return mBundle.containsKey(key); 379 } 380 381 /** 382 * Returns the value associated with the given key, or null if no mapping of 383 * the desired type exists for the given key or a null value is explicitly 384 * associated with the key. 385 * 386 * @param key The key the value is stored under 387 * @return a CharSequence value, or null 388 */ 389 public CharSequence getText(@TextKey String key) { 390 return mBundle.getCharSequence(key); 391 } 392 393 /** 394 * Returns the text value associated with the given key as a String, or null 395 * if no mapping of the desired type exists for the given key or a null 396 * value is explicitly associated with the key. This is equivalent to 397 * calling {@link #getText getText().toString()} if the value is not null. 398 * 399 * @param key The key the value is stored under 400 * @return a String value, or null 401 */ 402 public String getString(@TextKey String key) { 403 CharSequence text = getText(key); 404 if (text != null) { 405 return text.toString(); 406 } 407 return null; 408 } 409 410 /** 411 * Returns the value associated with the given key, or 0L if no long exists 412 * for the given key. 413 * 414 * @param key The key the value is stored under 415 * @return a long value 416 */ 417 public long getLong(@LongKey String key) { 418 return mBundle.getLong(key, 0); 419 } 420 421 /** 422 * Returns a {@link Rating} for the given key or null if no rating exists 423 * for the given key. 424 * 425 * @param key The key the value is stored under 426 * @return A {@link Rating} or null 427 */ 428 public Rating getRating(@RatingKey String key) { 429 Rating rating = null; 430 try { 431 rating = mBundle.getParcelable(key); 432 } catch (Exception e) { 433 // ignore, value was not a bitmap 434 Log.w(TAG, "Failed to retrieve a key as Rating.", e); 435 } 436 return rating; 437 } 438 439 /** 440 * Returns a {@link Bitmap} for the given key or null if no bitmap exists 441 * for the given key. 442 * 443 * @param key The key the value is stored under 444 * @return A {@link Bitmap} or null 445 */ 446 public Bitmap getBitmap(@BitmapKey String key) { 447 Bitmap bmp = null; 448 try { 449 bmp = mBundle.getParcelable(key); 450 } catch (Exception e) { 451 // ignore, value was not a bitmap 452 Log.w(TAG, "Failed to retrieve a key as Bitmap.", e); 453 } 454 return bmp; 455 } 456 457 @Override 458 public int describeContents() { 459 return 0; 460 } 461 462 @Override 463 public void writeToParcel(Parcel dest, int flags) { 464 dest.writeBundle(mBundle); 465 } 466 467 /** 468 * Returns the number of fields in this metadata. 469 * 470 * @return The number of fields in the metadata. 471 */ 472 public int size() { 473 return mBundle.size(); 474 } 475 476 /** 477 * Returns a Set containing the Strings used as keys in this metadata. 478 * 479 * @return a Set of String keys 480 */ 481 public Set<String> keySet() { 482 return mBundle.keySet(); 483 } 484 485 /** 486 * Returns a simple description of this metadata for display purposes. 487 * 488 * @return A simple description of this metadata. 489 */ 490 public @NonNull MediaDescription getDescription() { 491 if (mDescription != null) { 492 return mDescription; 493 } 494 495 String mediaId = getString(METADATA_KEY_MEDIA_ID); 496 497 CharSequence[] text = new CharSequence[3]; 498 Bitmap icon = null; 499 Uri iconUri = null; 500 501 // First handle the case where display data is set already 502 CharSequence displayText = getText(METADATA_KEY_DISPLAY_TITLE); 503 if (!TextUtils.isEmpty(displayText)) { 504 // If they have a display title use only display data, otherwise use 505 // our best bets 506 text[0] = displayText; 507 text[1] = getText(METADATA_KEY_DISPLAY_SUBTITLE); 508 text[2] = getText(METADATA_KEY_DISPLAY_DESCRIPTION); 509 } else { 510 // Use whatever fields we can 511 int textIndex = 0; 512 int keyIndex = 0; 513 while (textIndex < text.length && keyIndex < PREFERRED_DESCRIPTION_ORDER.length) { 514 CharSequence next = getText(PREFERRED_DESCRIPTION_ORDER[keyIndex++]); 515 if (!TextUtils.isEmpty(next)) { 516 // Fill in the next empty bit of text 517 text[textIndex++] = next; 518 } 519 } 520 } 521 522 // Get the best art bitmap we can find 523 for (int i = 0; i < PREFERRED_BITMAP_ORDER.length; i++) { 524 Bitmap next = getBitmap(PREFERRED_BITMAP_ORDER[i]); 525 if (next != null) { 526 icon = next; 527 break; 528 } 529 } 530 531 // Get the best Uri we can find 532 for (int i = 0; i < PREFERRED_URI_ORDER.length; i++) { 533 String next = getString(PREFERRED_URI_ORDER[i]); 534 if (!TextUtils.isEmpty(next)) { 535 iconUri = Uri.parse(next); 536 break; 537 } 538 } 539 540 MediaDescription.Builder bob = new MediaDescription.Builder(); 541 bob.setMediaId(mediaId); 542 bob.setTitle(text[0]); 543 bob.setSubtitle(text[1]); 544 bob.setDescription(text[2]); 545 bob.setIconBitmap(icon); 546 bob.setIconUri(iconUri); 547 mDescription = bob.build(); 548 549 return mDescription; 550 } 551 552 /** 553 * Helper for getting the String key used by {@link MediaMetadata} from the 554 * integer key that {@link MediaMetadataEditor} uses. 555 * 556 * @param editorKey The key used by the editor 557 * @return The key used by this class or null if no mapping exists 558 * @hide 559 */ 560 public static String getKeyFromMetadataEditorKey(int editorKey) { 561 return EDITOR_KEY_MAPPING.get(editorKey, null); 562 } 563 564 public static final Parcelable.Creator<MediaMetadata> CREATOR = 565 new Parcelable.Creator<MediaMetadata>() { 566 @Override 567 public MediaMetadata createFromParcel(Parcel in) { 568 return new MediaMetadata(in); 569 } 570 571 @Override 572 public MediaMetadata[] newArray(int size) { 573 return new MediaMetadata[size]; 574 } 575 }; 576 577 /** 578 * Use to build MediaMetadata objects. The system defined metadata keys must 579 * use the appropriate data type. 580 */ 581 public static final class Builder { 582 private final Bundle mBundle; 583 584 /** 585 * Create an empty Builder. Any field that should be included in the 586 * {@link MediaMetadata} must be added. 587 */ 588 public Builder() { 589 mBundle = new Bundle(); 590 } 591 592 /** 593 * Create a Builder using a {@link MediaMetadata} instance to set the 594 * initial values. All fields in the source metadata will be included in 595 * the new metadata. Fields can be overwritten by adding the same key. 596 * 597 * @param source 598 */ 599 public Builder(MediaMetadata source) { 600 mBundle = new Bundle(source.mBundle); 601 } 602 603 /** 604 * Create a Builder using a {@link MediaMetadata} instance to set 605 * initial values, but replace bitmaps with a scaled down copy if they 606 * are larger than maxBitmapSize. 607 * 608 * @param source The original metadata to copy. 609 * @param maxBitmapSize The maximum height/width for bitmaps contained 610 * in the metadata. 611 * @hide 612 */ 613 public Builder(MediaMetadata source, int maxBitmapSize) { 614 this(source); 615 for (String key : mBundle.keySet()) { 616 Object value = mBundle.get(key); 617 if (value != null && value instanceof Bitmap) { 618 Bitmap bmp = (Bitmap) value; 619 if (bmp.getHeight() > maxBitmapSize || bmp.getWidth() > maxBitmapSize) { 620 putBitmap(key, scaleBitmap(bmp, maxBitmapSize)); 621 } 622 } 623 } 624 } 625 626 /** 627 * Put a CharSequence value into the metadata. Custom keys may be used, 628 * but if the METADATA_KEYs defined in this class are used they may only 629 * be one of the following: 630 * <ul> 631 * <li>{@link #METADATA_KEY_TITLE}</li> 632 * <li>{@link #METADATA_KEY_ARTIST}</li> 633 * <li>{@link #METADATA_KEY_ALBUM}</li> 634 * <li>{@link #METADATA_KEY_AUTHOR}</li> 635 * <li>{@link #METADATA_KEY_WRITER}</li> 636 * <li>{@link #METADATA_KEY_COMPOSER}</li> 637 * <li>{@link #METADATA_KEY_DATE}</li> 638 * <li>{@link #METADATA_KEY_GENRE}</li> 639 * <li>{@link #METADATA_KEY_ALBUM_ARTIST}</li> 640 * <li>{@link #METADATA_KEY_ART_URI}</li> 641 * <li>{@link #METADATA_KEY_ALBUM_ART_URI}</li> 642 * <li>{@link #METADATA_KEY_DISPLAY_TITLE}</li> 643 * <li>{@link #METADATA_KEY_DISPLAY_SUBTITLE}</li> 644 * <li>{@link #METADATA_KEY_DISPLAY_DESCRIPTION}</li> 645 * <li>{@link #METADATA_KEY_DISPLAY_ICON_URI}</li> 646 * </ul> 647 * 648 * @param key The key for referencing this value 649 * @param value The CharSequence value to store 650 * @return The Builder to allow chaining 651 */ 652 public Builder putText(@TextKey String key, CharSequence value) { 653 if (METADATA_KEYS_TYPE.containsKey(key)) { 654 if (METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_TEXT) { 655 throw new IllegalArgumentException("The " + key 656 + " key cannot be used to put a CharSequence"); 657 } 658 } 659 mBundle.putCharSequence(key, value); 660 return this; 661 } 662 663 /** 664 * Put a String value into the metadata. Custom keys may be used, but if 665 * the METADATA_KEYs defined in this class are used they may only be one 666 * of the following: 667 * <ul> 668 * <li>{@link #METADATA_KEY_TITLE}</li> 669 * <li>{@link #METADATA_KEY_ARTIST}</li> 670 * <li>{@link #METADATA_KEY_ALBUM}</li> 671 * <li>{@link #METADATA_KEY_AUTHOR}</li> 672 * <li>{@link #METADATA_KEY_WRITER}</li> 673 * <li>{@link #METADATA_KEY_COMPOSER}</li> 674 * <li>{@link #METADATA_KEY_DATE}</li> 675 * <li>{@link #METADATA_KEY_GENRE}</li> 676 * <li>{@link #METADATA_KEY_ALBUM_ARTIST}</li> 677 * <li>{@link #METADATA_KEY_ART_URI}</li> 678 * <li>{@link #METADATA_KEY_ALBUM_ART_URI}</li> 679 * <li>{@link #METADATA_KEY_DISPLAY_TITLE}</li> 680 * <li>{@link #METADATA_KEY_DISPLAY_SUBTITLE}</li> 681 * <li>{@link #METADATA_KEY_DISPLAY_DESCRIPTION}</li> 682 * <li>{@link #METADATA_KEY_DISPLAY_ICON_URI}</li> 683 * </ul> 684 * <p> 685 * Uris for artwork should use the content:// style and support 686 * {@link ContentResolver#EXTRA_SIZE} for retrieving scaled artwork 687 * through {@link ContentResolver#openTypedAssetFileDescriptor(Uri, 688 * String, Bundle)}. 689 * 690 * @param key The key for referencing this value 691 * @param value The String value to store 692 * @return The Builder to allow chaining 693 */ 694 public Builder putString(@TextKey String key, String value) { 695 if (METADATA_KEYS_TYPE.containsKey(key)) { 696 if (METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_TEXT) { 697 throw new IllegalArgumentException("The " + key 698 + " key cannot be used to put a String"); 699 } 700 } 701 mBundle.putCharSequence(key, value); 702 return this; 703 } 704 705 /** 706 * Put a long value into the metadata. Custom keys may be used, but if 707 * the METADATA_KEYs defined in this class are used they may only be one 708 * of the following: 709 * <ul> 710 * <li>{@link #METADATA_KEY_DURATION}</li> 711 * <li>{@link #METADATA_KEY_TRACK_NUMBER}</li> 712 * <li>{@link #METADATA_KEY_NUM_TRACKS}</li> 713 * <li>{@link #METADATA_KEY_DISC_NUMBER}</li> 714 * <li>{@link #METADATA_KEY_YEAR}</li> 715 * </ul> 716 * 717 * @param key The key for referencing this value 718 * @param value The long value to store 719 * @return The Builder to allow chaining 720 */ 721 public Builder putLong(@LongKey String key, long value) { 722 if (METADATA_KEYS_TYPE.containsKey(key)) { 723 if (METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_LONG) { 724 throw new IllegalArgumentException("The " + key 725 + " key cannot be used to put a long"); 726 } 727 } 728 mBundle.putLong(key, value); 729 return this; 730 } 731 732 /** 733 * Put a {@link Rating} into the metadata. Custom keys may be used, but 734 * if the METADATA_KEYs defined in this class are used they may only be 735 * one of the following: 736 * <ul> 737 * <li>{@link #METADATA_KEY_RATING}</li> 738 * <li>{@link #METADATA_KEY_USER_RATING}</li> 739 * </ul> 740 * 741 * @param key The key for referencing this value 742 * @param value The Rating value to store 743 * @return The Builder to allow chaining 744 */ 745 public Builder putRating(@RatingKey String key, Rating value) { 746 if (METADATA_KEYS_TYPE.containsKey(key)) { 747 if (METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_RATING) { 748 throw new IllegalArgumentException("The " + key 749 + " key cannot be used to put a Rating"); 750 } 751 } 752 mBundle.putParcelable(key, value); 753 return this; 754 } 755 756 /** 757 * Put a {@link Bitmap} into the metadata. Custom keys may be used, but 758 * if the METADATA_KEYs defined in this class are used they may only be 759 * one of the following: 760 * <ul> 761 * <li>{@link #METADATA_KEY_ART}</li> 762 * <li>{@link #METADATA_KEY_ALBUM_ART}</li> 763 * <li>{@link #METADATA_KEY_DISPLAY_ICON}</li> 764 * </ul> 765 * <p> 766 * Large bitmaps may be scaled down by the system. To pass full 767 * resolution images {@link Uri Uris} should be used with 768 * {@link #putString}. 769 * 770 * @param key The key for referencing this value 771 * @param value The Bitmap to store 772 * @return The Builder to allow chaining 773 */ 774 public Builder putBitmap(@BitmapKey String key, Bitmap value) { 775 if (METADATA_KEYS_TYPE.containsKey(key)) { 776 if (METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_BITMAP) { 777 throw new IllegalArgumentException("The " + key 778 + " key cannot be used to put a Bitmap"); 779 } 780 } 781 mBundle.putParcelable(key, value); 782 return this; 783 } 784 785 /** 786 * Creates a {@link MediaMetadata} instance with the specified fields. 787 * 788 * @return The new MediaMetadata instance 789 */ 790 public MediaMetadata build() { 791 return new MediaMetadata(mBundle); 792 } 793 794 private Bitmap scaleBitmap(Bitmap bmp, int maxSize) { 795 float maxSizeF = maxSize; 796 float widthScale = maxSizeF / bmp.getWidth(); 797 float heightScale = maxSizeF / bmp.getHeight(); 798 float scale = Math.min(widthScale, heightScale); 799 int height = (int) (bmp.getHeight() * scale); 800 int width = (int) (bmp.getWidth() * scale); 801 return Bitmap.createScaledBitmap(bmp, width, height, true); 802 } 803 } 804 } 805
