Resources.java revision 60454dbc4d815c90ff2713e224953d6547fc3ad5
1/* 2 * Copyright (C) 2006 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.content.res; 18 19import com.android.internal.util.XmlUtils; 20 21import org.xmlpull.v1.XmlPullParser; 22import org.xmlpull.v1.XmlPullParserException; 23 24import android.animation.Animator; 25import android.animation.StateListAnimator; 26import android.annotation.NonNull; 27import android.annotation.Nullable; 28import android.content.pm.ActivityInfo; 29import android.content.res.ColorStateList.ColorStateListFactory; 30import android.graphics.Movie; 31import android.graphics.drawable.ColorDrawable; 32import android.graphics.drawable.Drawable; 33import android.graphics.drawable.Drawable.ConstantState; 34import android.os.Build; 35import android.os.Bundle; 36import android.os.IBinder; 37import android.os.Trace; 38import android.util.ArrayMap; 39import android.util.AttributeSet; 40import android.util.DisplayMetrics; 41import android.util.Log; 42import android.util.LongSparseArray; 43import android.util.Pools.SynchronizedPool; 44import android.util.Slog; 45import android.util.TypedValue; 46import android.view.ViewDebug; 47 48import java.io.IOException; 49import java.io.InputStream; 50import java.lang.ref.WeakReference; 51import java.util.Locale; 52 53import libcore.icu.NativePluralRules; 54 55/** 56 * Class for accessing an application's resources. This sits on top of the 57 * asset manager of the application (accessible through {@link #getAssets}) and 58 * provides a high-level API for getting typed data from the assets. 59 * 60 * <p>The Android resource system keeps track of all non-code assets associated with an 61 * application. You can use this class to access your application's resources. You can generally 62 * acquire the {@link android.content.res.Resources} instance associated with your application 63 * with {@link android.content.Context#getResources getResources()}.</p> 64 * 65 * <p>The Android SDK tools compile your application's resources into the application binary 66 * at build time. To use a resource, you must install it correctly in the source tree (inside 67 * your project's {@code res/} directory) and build your application. As part of the build 68 * process, the SDK tools generate symbols for each resource, which you can use in your application 69 * code to access the resources.</p> 70 * 71 * <p>Using application resources makes it easy to update various characteristics of your 72 * application without modifying code, and—by providing sets of alternative 73 * resources—enables you to optimize your application for a variety of device configurations 74 * (such as for different languages and screen sizes). This is an important aspect of developing 75 * Android applications that are compatible on different types of devices.</p> 76 * 77 * <p>For more information about using resources, see the documentation about <a 78 * href="{@docRoot}guide/topics/resources/index.html">Application Resources</a>.</p> 79 */ 80public class Resources { 81 static final String TAG = "Resources"; 82 83 private static final boolean DEBUG_LOAD = false; 84 private static final boolean DEBUG_CONFIG = false; 85 private static final boolean TRACE_FOR_PRELOAD = false; 86 private static final boolean TRACE_FOR_MISS_PRELOAD = false; 87 88 private static final int LAYOUT_DIR_CONFIG = ActivityInfo.activityInfoConfigToNative( 89 ActivityInfo.CONFIG_LAYOUT_DIRECTION); 90 91 private static final int ID_OTHER = 0x01000004; 92 93 private static final Object sSync = new Object(); 94 95 // Information about preloaded resources. Note that they are not 96 // protected by a lock, because while preloading in zygote we are all 97 // single-threaded, and after that these are immutable. 98 private static final LongSparseArray<ConstantState>[] sPreloadedDrawables; 99 private static final LongSparseArray<ConstantState> sPreloadedColorDrawables 100 = new LongSparseArray<ConstantState>(); 101 private static final LongSparseArray<ColorStateListFactory> sPreloadedColorStateLists 102 = new LongSparseArray<ColorStateListFactory>(); 103 104 // Pool of TypedArrays targeted to this Resources object. 105 final SynchronizedPool<TypedArray> mTypedArrayPool = new SynchronizedPool<TypedArray>(5); 106 107 // Used by BridgeResources in layoutlib 108 static Resources mSystem = null; 109 110 private static boolean sPreloaded; 111 private static int sPreloadedDensity; 112 113 // These are protected by mAccessLock. 114 private final Object mAccessLock = new Object(); 115 private final Configuration mTmpConfig = new Configuration(); 116 private final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> mDrawableCache = 117 new ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>>(); 118 private final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> mColorDrawableCache = 119 new ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>>(); 120 private final ConfigurationBoundResourceCache<ColorStateList> mColorStateListCache = 121 new ConfigurationBoundResourceCache<ColorStateList>(this); 122 private final ConfigurationBoundResourceCache<Animator> mAnimatorCache = 123 new ConfigurationBoundResourceCache<Animator>(this); 124 private final ConfigurationBoundResourceCache<StateListAnimator> mStateListAnimatorCache = 125 new ConfigurationBoundResourceCache<StateListAnimator>(this); 126 127 private TypedValue mTmpValue = new TypedValue(); 128 private boolean mPreloading; 129 130 private TypedArray mCachedStyledAttributes = null; 131 132 private int mLastCachedXmlBlockIndex = -1; 133 private final int[] mCachedXmlBlockIds = { 0, 0, 0, 0 }; 134 private final XmlBlock[] mCachedXmlBlocks = new XmlBlock[4]; 135 136 final AssetManager mAssets; 137 final DisplayMetrics mMetrics = new DisplayMetrics(); 138 139 private final Configuration mConfiguration = new Configuration(); 140 private NativePluralRules mPluralRule; 141 142 private CompatibilityInfo mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 143 144 static { 145 sPreloadedDrawables = new LongSparseArray[2]; 146 sPreloadedDrawables[0] = new LongSparseArray<ConstantState>(); 147 sPreloadedDrawables[1] = new LongSparseArray<ConstantState>(); 148 } 149 150 /** 151 * Returns the most appropriate default theme for the specified target SDK version. 152 * <ul> 153 * <li>Below API 11: Gingerbread 154 * <li>APIs 11 thru 14: Holo 155 * <li>APIs 14 thru XX: Device default dark 156 * <li>API XX and above: Device default light with dark action bar 157 * </ul> 158 * 159 * @param curTheme The current theme, or 0 if not specified. 160 * @param targetSdkVersion The target SDK version. 161 * @return A theme resource identifier 162 * @hide 163 */ 164 public static int selectDefaultTheme(int curTheme, int targetSdkVersion) { 165 return selectSystemTheme(curTheme, targetSdkVersion, 166 com.android.internal.R.style.Theme, 167 com.android.internal.R.style.Theme_Holo, 168 com.android.internal.R.style.Theme_DeviceDefault, 169 com.android.internal.R.style.Theme_DeviceDefault_Light_DarkActionBar); 170 } 171 172 /** @hide */ 173 public static int selectSystemTheme(int curTheme, int targetSdkVersion, int orig, int holo, 174 int dark, int deviceDefault) { 175 if (curTheme != 0) { 176 return curTheme; 177 } 178 if (targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) { 179 return orig; 180 } 181 if (targetSdkVersion < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 182 return holo; 183 } 184 if (targetSdkVersion < Build.VERSION_CODES.CUR_DEVELOPMENT) { 185 return dark; 186 } 187 return deviceDefault; 188 } 189 190 /** 191 * Used by AnimatorInflater. 192 * 193 * @hide 194 */ 195 public ConfigurationBoundResourceCache<Animator> getAnimatorCache() { 196 return mAnimatorCache; 197 } 198 199 /** 200 * Used by AnimatorInflater. 201 * 202 * @hide 203 */ 204 public ConfigurationBoundResourceCache<StateListAnimator> getStateListAnimatorCache() { 205 return mStateListAnimatorCache; 206 } 207 208 /** 209 * This exception is thrown by the resource APIs when a requested resource 210 * can not be found. 211 */ 212 public static class NotFoundException extends RuntimeException { 213 public NotFoundException() { 214 } 215 216 public NotFoundException(String name) { 217 super(name); 218 } 219 } 220 221 /** 222 * Create a new Resources object on top of an existing set of assets in an 223 * AssetManager. 224 * 225 * @param assets Previously created AssetManager. 226 * @param metrics Current display metrics to consider when 227 * selecting/computing resource values. 228 * @param config Desired device configuration to consider when 229 * selecting/computing resource values (optional). 230 */ 231 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config) { 232 this(assets, metrics, config, CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO); 233 } 234 235 /** 236 * Creates a new Resources object with CompatibilityInfo. 237 * 238 * @param assets Previously created AssetManager. 239 * @param metrics Current display metrics to consider when 240 * selecting/computing resource values. 241 * @param config Desired device configuration to consider when 242 * selecting/computing resource values (optional). 243 * @param compatInfo this resource's compatibility info. Must not be null. 244 * @hide 245 */ 246 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config, 247 CompatibilityInfo compatInfo) { 248 mAssets = assets; 249 mMetrics.setToDefaults(); 250 if (compatInfo != null) { 251 mCompatibilityInfo = compatInfo; 252 } 253 updateConfiguration(config, metrics); 254 assets.ensureStringBlocks(); 255 } 256 257 /** 258 * Return a global shared Resources object that provides access to only 259 * system resources (no application resources), and is not configured for 260 * the current screen (can not use dimension units, does not change based 261 * on orientation, etc). 262 */ 263 public static Resources getSystem() { 264 synchronized (sSync) { 265 Resources ret = mSystem; 266 if (ret == null) { 267 ret = new Resources(); 268 mSystem = ret; 269 } 270 271 return ret; 272 } 273 } 274 275 /** 276 * Return the string value associated with a particular resource ID. The 277 * returned object will be a String if this is a plain string; it will be 278 * some other type of CharSequence if it is styled. 279 * {@more} 280 * 281 * @param id The desired resource identifier, as generated by the aapt 282 * tool. This integer encodes the package, type, and resource 283 * entry. The value 0 is an invalid identifier. 284 * 285 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 286 * 287 * @return CharSequence The string data associated with the resource, plus 288 * possibly styled text information. 289 */ 290 public CharSequence getText(int id) throws NotFoundException { 291 CharSequence res = mAssets.getResourceText(id); 292 if (res != null) { 293 return res; 294 } 295 throw new NotFoundException("String resource ID #0x" 296 + Integer.toHexString(id)); 297 } 298 299 /** 300 * Returns the character sequence necessary for grammatically correct pluralization 301 * of the given resource ID for the given quantity. 302 * Note that the character sequence is selected based solely on grammatical necessity, 303 * and that such rules differ between languages. Do not assume you know which string 304 * will be returned for a given quantity. See 305 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 306 * for more detail. 307 * 308 * @param id The desired resource identifier, as generated by the aapt 309 * tool. This integer encodes the package, type, and resource 310 * entry. The value 0 is an invalid identifier. 311 * @param quantity The number used to get the correct string for the current language's 312 * plural rules. 313 * 314 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 315 * 316 * @return CharSequence The string data associated with the resource, plus 317 * possibly styled text information. 318 */ 319 public CharSequence getQuantityText(int id, int quantity) throws NotFoundException { 320 NativePluralRules rule = getPluralRule(); 321 CharSequence res = mAssets.getResourceBagText(id, 322 attrForQuantityCode(rule.quantityForInt(quantity))); 323 if (res != null) { 324 return res; 325 } 326 res = mAssets.getResourceBagText(id, ID_OTHER); 327 if (res != null) { 328 return res; 329 } 330 throw new NotFoundException("Plural resource ID #0x" + Integer.toHexString(id) 331 + " quantity=" + quantity 332 + " item=" + stringForQuantityCode(rule.quantityForInt(quantity))); 333 } 334 335 private NativePluralRules getPluralRule() { 336 synchronized (sSync) { 337 if (mPluralRule == null) { 338 mPluralRule = NativePluralRules.forLocale(mConfiguration.locale); 339 } 340 return mPluralRule; 341 } 342 } 343 344 private static int attrForQuantityCode(int quantityCode) { 345 switch (quantityCode) { 346 case NativePluralRules.ZERO: return 0x01000005; 347 case NativePluralRules.ONE: return 0x01000006; 348 case NativePluralRules.TWO: return 0x01000007; 349 case NativePluralRules.FEW: return 0x01000008; 350 case NativePluralRules.MANY: return 0x01000009; 351 default: return ID_OTHER; 352 } 353 } 354 355 private static String stringForQuantityCode(int quantityCode) { 356 switch (quantityCode) { 357 case NativePluralRules.ZERO: return "zero"; 358 case NativePluralRules.ONE: return "one"; 359 case NativePluralRules.TWO: return "two"; 360 case NativePluralRules.FEW: return "few"; 361 case NativePluralRules.MANY: return "many"; 362 default: return "other"; 363 } 364 } 365 366 /** 367 * Return the string value associated with a particular resource ID. It 368 * will be stripped of any styled text information. 369 * {@more} 370 * 371 * @param id The desired resource identifier, as generated by the aapt 372 * tool. This integer encodes the package, type, and resource 373 * entry. The value 0 is an invalid identifier. 374 * 375 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 376 * 377 * @return String The string data associated with the resource, 378 * stripped of styled text information. 379 */ 380 public String getString(int id) throws NotFoundException { 381 CharSequence res = getText(id); 382 if (res != null) { 383 return res.toString(); 384 } 385 throw new NotFoundException("String resource ID #0x" 386 + Integer.toHexString(id)); 387 } 388 389 390 /** 391 * Return the string value associated with a particular resource ID, 392 * substituting the format arguments as defined in {@link java.util.Formatter} 393 * and {@link java.lang.String#format}. It will be stripped of any styled text 394 * information. 395 * {@more} 396 * 397 * @param id The desired resource identifier, as generated by the aapt 398 * tool. This integer encodes the package, type, and resource 399 * entry. The value 0 is an invalid identifier. 400 * 401 * @param formatArgs The format arguments that will be used for substitution. 402 * 403 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 404 * 405 * @return String The string data associated with the resource, 406 * stripped of styled text information. 407 */ 408 public String getString(int id, Object... formatArgs) throws NotFoundException { 409 String raw = getString(id); 410 return String.format(mConfiguration.locale, raw, formatArgs); 411 } 412 413 /** 414 * Formats the string necessary for grammatically correct pluralization 415 * of the given resource ID for the given quantity, using the given arguments. 416 * Note that the string is selected based solely on grammatical necessity, 417 * and that such rules differ between languages. Do not assume you know which string 418 * will be returned for a given quantity. See 419 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 420 * for more detail. 421 * 422 * <p>Substitution of format arguments works as if using 423 * {@link java.util.Formatter} and {@link java.lang.String#format}. 424 * The resulting string will be stripped of any styled text information. 425 * 426 * @param id The desired resource identifier, as generated by the aapt 427 * tool. This integer encodes the package, type, and resource 428 * entry. The value 0 is an invalid identifier. 429 * @param quantity The number used to get the correct string for the current language's 430 * plural rules. 431 * @param formatArgs The format arguments that will be used for substitution. 432 * 433 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 434 * 435 * @return String The string data associated with the resource, 436 * stripped of styled text information. 437 */ 438 public String getQuantityString(int id, int quantity, Object... formatArgs) 439 throws NotFoundException { 440 String raw = getQuantityText(id, quantity).toString(); 441 return String.format(mConfiguration.locale, raw, formatArgs); 442 } 443 444 /** 445 * Returns the string necessary for grammatically correct pluralization 446 * of the given resource ID for the given quantity. 447 * Note that the string is selected based solely on grammatical necessity, 448 * and that such rules differ between languages. Do not assume you know which string 449 * will be returned for a given quantity. See 450 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 451 * for more detail. 452 * 453 * @param id The desired resource identifier, as generated by the aapt 454 * tool. This integer encodes the package, type, and resource 455 * entry. The value 0 is an invalid identifier. 456 * @param quantity The number used to get the correct string for the current language's 457 * plural rules. 458 * 459 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 460 * 461 * @return String The string data associated with the resource, 462 * stripped of styled text information. 463 */ 464 public String getQuantityString(int id, int quantity) throws NotFoundException { 465 return getQuantityText(id, quantity).toString(); 466 } 467 468 /** 469 * Return the string value associated with a particular resource ID. The 470 * returned object will be a String if this is a plain string; it will be 471 * some other type of CharSequence if it is styled. 472 * 473 * @param id The desired resource identifier, as generated by the aapt 474 * tool. This integer encodes the package, type, and resource 475 * entry. The value 0 is an invalid identifier. 476 * 477 * @param def The default CharSequence to return. 478 * 479 * @return CharSequence The string data associated with the resource, plus 480 * possibly styled text information, or def if id is 0 or not found. 481 */ 482 public CharSequence getText(int id, CharSequence def) { 483 CharSequence res = id != 0 ? mAssets.getResourceText(id) : null; 484 return res != null ? res : def; 485 } 486 487 /** 488 * Return the styled text array associated with a particular resource ID. 489 * 490 * @param id The desired resource identifier, as generated by the aapt 491 * tool. This integer encodes the package, type, and resource 492 * entry. The value 0 is an invalid identifier. 493 * 494 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 495 * 496 * @return The styled text array associated with the resource. 497 */ 498 public CharSequence[] getTextArray(int id) throws NotFoundException { 499 CharSequence[] res = mAssets.getResourceTextArray(id); 500 if (res != null) { 501 return res; 502 } 503 throw new NotFoundException("Text array resource ID #0x" 504 + Integer.toHexString(id)); 505 } 506 507 /** 508 * Return the string array associated with a particular resource ID. 509 * 510 * @param id The desired resource identifier, as generated by the aapt 511 * tool. This integer encodes the package, type, and resource 512 * entry. The value 0 is an invalid identifier. 513 * 514 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 515 * 516 * @return The string array associated with the resource. 517 */ 518 public String[] getStringArray(int id) throws NotFoundException { 519 String[] res = mAssets.getResourceStringArray(id); 520 if (res != null) { 521 return res; 522 } 523 throw new NotFoundException("String array resource ID #0x" 524 + Integer.toHexString(id)); 525 } 526 527 /** 528 * Return the int array associated with a particular resource ID. 529 * 530 * @param id The desired resource identifier, as generated by the aapt 531 * tool. This integer encodes the package, type, and resource 532 * entry. The value 0 is an invalid identifier. 533 * 534 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 535 * 536 * @return The int array associated with the resource. 537 */ 538 public int[] getIntArray(int id) throws NotFoundException { 539 int[] res = mAssets.getArrayIntResource(id); 540 if (res != null) { 541 return res; 542 } 543 throw new NotFoundException("Int array resource ID #0x" 544 + Integer.toHexString(id)); 545 } 546 547 /** 548 * Return an array of heterogeneous values. 549 * 550 * @param id The desired resource identifier, as generated by the aapt 551 * tool. This integer encodes the package, type, and resource 552 * entry. The value 0 is an invalid identifier. 553 * 554 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 555 * 556 * @return Returns a TypedArray holding an array of the array values. 557 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 558 * when done with it. 559 */ 560 public TypedArray obtainTypedArray(int id) throws NotFoundException { 561 int len = mAssets.getArraySize(id); 562 if (len < 0) { 563 throw new NotFoundException("Array resource ID #0x" 564 + Integer.toHexString(id)); 565 } 566 567 TypedArray array = TypedArray.obtain(this, len); 568 array.mLength = mAssets.retrieveArray(id, array.mData); 569 array.mIndices[0] = 0; 570 571 return array; 572 } 573 574 /** 575 * Retrieve a dimensional for a particular resource ID. Unit 576 * conversions are based on the current {@link DisplayMetrics} associated 577 * with the resources. 578 * 579 * @param id The desired resource identifier, as generated by the aapt 580 * tool. This integer encodes the package, type, and resource 581 * entry. The value 0 is an invalid identifier. 582 * 583 * @return Resource dimension value multiplied by the appropriate 584 * metric. 585 * 586 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 587 * 588 * @see #getDimensionPixelOffset 589 * @see #getDimensionPixelSize 590 */ 591 public float getDimension(int id) throws NotFoundException { 592 synchronized (mAccessLock) { 593 TypedValue value = mTmpValue; 594 if (value == null) { 595 mTmpValue = value = new TypedValue(); 596 } 597 getValue(id, value, true); 598 if (value.type == TypedValue.TYPE_DIMENSION) { 599 return TypedValue.complexToDimension(value.data, mMetrics); 600 } 601 throw new NotFoundException( 602 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 603 + Integer.toHexString(value.type) + " is not valid"); 604 } 605 } 606 607 /** 608 * Retrieve a dimensional for a particular resource ID for use 609 * as an offset in raw pixels. This is the same as 610 * {@link #getDimension}, except the returned value is converted to 611 * integer pixels for you. An offset conversion involves simply 612 * truncating the base value to an integer. 613 * 614 * @param id The desired resource identifier, as generated by the aapt 615 * tool. This integer encodes the package, type, and resource 616 * entry. The value 0 is an invalid identifier. 617 * 618 * @return Resource dimension value multiplied by the appropriate 619 * metric and truncated to integer pixels. 620 * 621 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 622 * 623 * @see #getDimension 624 * @see #getDimensionPixelSize 625 */ 626 public int getDimensionPixelOffset(int id) throws NotFoundException { 627 synchronized (mAccessLock) { 628 TypedValue value = mTmpValue; 629 if (value == null) { 630 mTmpValue = value = new TypedValue(); 631 } 632 getValue(id, value, true); 633 if (value.type == TypedValue.TYPE_DIMENSION) { 634 return TypedValue.complexToDimensionPixelOffset( 635 value.data, mMetrics); 636 } 637 throw new NotFoundException( 638 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 639 + Integer.toHexString(value.type) + " is not valid"); 640 } 641 } 642 643 /** 644 * Retrieve a dimensional for a particular resource ID for use 645 * as a size in raw pixels. This is the same as 646 * {@link #getDimension}, except the returned value is converted to 647 * integer pixels for use as a size. A size conversion involves 648 * rounding the base value, and ensuring that a non-zero base value 649 * is at least one pixel in size. 650 * 651 * @param id The desired resource identifier, as generated by the aapt 652 * tool. This integer encodes the package, type, and resource 653 * entry. The value 0 is an invalid identifier. 654 * 655 * @return Resource dimension value multiplied by the appropriate 656 * metric and truncated to integer pixels. 657 * 658 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 659 * 660 * @see #getDimension 661 * @see #getDimensionPixelOffset 662 */ 663 public int getDimensionPixelSize(int id) throws NotFoundException { 664 synchronized (mAccessLock) { 665 TypedValue value = mTmpValue; 666 if (value == null) { 667 mTmpValue = value = new TypedValue(); 668 } 669 getValue(id, value, true); 670 if (value.type == TypedValue.TYPE_DIMENSION) { 671 return TypedValue.complexToDimensionPixelSize( 672 value.data, mMetrics); 673 } 674 throw new NotFoundException( 675 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 676 + Integer.toHexString(value.type) + " is not valid"); 677 } 678 } 679 680 /** 681 * Retrieve a fractional unit for a particular resource ID. 682 * 683 * @param id The desired resource identifier, as generated by the aapt 684 * tool. This integer encodes the package, type, and resource 685 * entry. The value 0 is an invalid identifier. 686 * @param base The base value of this fraction. In other words, a 687 * standard fraction is multiplied by this value. 688 * @param pbase The parent base value of this fraction. In other 689 * words, a parent fraction (nn%p) is multiplied by this 690 * value. 691 * 692 * @return Attribute fractional value multiplied by the appropriate 693 * base value. 694 * 695 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 696 */ 697 public float getFraction(int id, int base, int pbase) { 698 synchronized (mAccessLock) { 699 TypedValue value = mTmpValue; 700 if (value == null) { 701 mTmpValue = value = new TypedValue(); 702 } 703 getValue(id, value, true); 704 if (value.type == TypedValue.TYPE_FRACTION) { 705 return TypedValue.complexToFraction(value.data, base, pbase); 706 } 707 throw new NotFoundException( 708 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 709 + Integer.toHexString(value.type) + " is not valid"); 710 } 711 } 712 713 /** 714 * Return a drawable object associated with a particular resource ID. 715 * Various types of objects will be returned depending on the underlying 716 * resource -- for example, a solid color, PNG image, scalable image, etc. 717 * The Drawable API hides these implementation details. 718 * 719 * <p class="note"><strong>Note:</strong> Prior to 720 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, this function 721 * would not correctly retrieve the final configuration density when 722 * the resource ID passed here is an alias to another Drawable resource. 723 * This means that if the density configuration of the alias resource 724 * is different than the actual resource, the density of the returned 725 * Drawable would be incorrect, resulting in bad scaling. To work 726 * around this, you can instead retrieve the Drawable through 727 * {@link TypedArray#getDrawable TypedArray.getDrawable}. Use 728 * {@link android.content.Context#obtainStyledAttributes(int[]) 729 * Context.obtainStyledAttributes} with 730 * an array containing the resource ID of interest to create the TypedArray.</p> 731 * 732 * <p class="note"><strong>Note:</strong> To obtain a themed drawable, use 733 * {@link android.content.Context#getDrawable(int) Context.getDrawable(int)} 734 * or {@link #getDrawable(int, Theme)} passing the desired theme.</p> 735 * 736 * @param id The desired resource identifier, as generated by the aapt 737 * tool. This integer encodes the package, type, and resource 738 * entry. The value 0 is an invalid identifier. 739 * @return Drawable An object that can be used to draw this resource. 740 * @throws NotFoundException Throws NotFoundException if the given ID does 741 * not exist. 742 * @see #getDrawable(int, Theme) 743 * @deprecated Use {@link #getDrawable(int, Theme)} instead. 744 */ 745 @Deprecated 746 @Nullable 747 public Drawable getDrawable(int id) throws NotFoundException { 748 final Drawable d = getDrawable(id, null); 749 if (d != null && d.canApplyTheme()) { 750 Log.w(TAG, "Drawable " + getResourceName(id) + " has unresolved theme " 751 + "attributes! Consider using Resources.getDrawable(int, Theme) or " 752 + "Context.getDrawable(int).", new RuntimeException()); 753 } 754 return d; 755 } 756 757 /** 758 * Return a drawable object associated with a particular resource ID and 759 * styled for the specified theme. Various types of objects will be 760 * returned depending on the underlying resource -- for example, a solid 761 * color, PNG image, scalable image, etc. 762 * 763 * @param id The desired resource identifier, as generated by the aapt 764 * tool. This integer encodes the package, type, and resource 765 * entry. The value 0 is an invalid identifier. 766 * @param theme The theme used to style the drawable attributes, may be {@code null}. 767 * @return Drawable An object that can be used to draw this resource. 768 * @throws NotFoundException Throws NotFoundException if the given ID does 769 * not exist. 770 */ 771 @Nullable 772 public Drawable getDrawable(int id, @Nullable Theme theme) throws NotFoundException { 773 TypedValue value; 774 synchronized (mAccessLock) { 775 value = mTmpValue; 776 if (value == null) { 777 value = new TypedValue(); 778 } else { 779 mTmpValue = null; 780 } 781 getValue(id, value, true); 782 } 783 final Drawable res = loadDrawable(value, id, theme); 784 synchronized (mAccessLock) { 785 if (mTmpValue == null) { 786 mTmpValue = value; 787 } 788 } 789 return res; 790 } 791 792 /** 793 * Return a drawable object associated with a particular resource ID for the 794 * given screen density in DPI. This will set the drawable's density to be 795 * the device's density multiplied by the ratio of actual drawable density 796 * to requested density. This allows the drawable to be scaled up to the 797 * correct size if needed. Various types of objects will be returned 798 * depending on the underlying resource -- for example, a solid color, PNG 799 * image, scalable image, etc. The Drawable API hides these implementation 800 * details. 801 * 802 * <p class="note"><strong>Note:</strong> To obtain a themed drawable, use 803 * {@link android.content.Context#getDrawable(int) Context.getDrawable(int)} 804 * or {@link #getDrawableForDensity(int, int, Theme)} passing the desired 805 * theme.</p> 806 * 807 * @param id The desired resource identifier, as generated by the aapt tool. 808 * This integer encodes the package, type, and resource entry. 809 * The value 0 is an invalid identifier. 810 * @param density the desired screen density indicated by the resource as 811 * found in {@link DisplayMetrics}. 812 * @return Drawable An object that can be used to draw this resource. 813 * @throws NotFoundException Throws NotFoundException if the given ID does 814 * not exist. 815 * @see #getDrawableForDensity(int, int, Theme) 816 * @deprecated Use {@link #getDrawableForDensity(int, int, Theme)} instead. 817 */ 818 @Deprecated 819 @Nullable 820 public Drawable getDrawableForDensity(int id, int density) throws NotFoundException { 821 return getDrawableForDensity(id, density, null); 822 } 823 824 /** 825 * Return a drawable object associated with a particular resource ID for the 826 * given screen density in DPI and styled for the specified theme. 827 * 828 * @param id The desired resource identifier, as generated by the aapt tool. 829 * This integer encodes the package, type, and resource entry. 830 * The value 0 is an invalid identifier. 831 * @param density The desired screen density indicated by the resource as 832 * found in {@link DisplayMetrics}. 833 * @param theme The theme used to style the drawable attributes, may be {@code null}. 834 * @return Drawable An object that can be used to draw this resource. 835 * @throws NotFoundException Throws NotFoundException if the given ID does 836 * not exist. 837 */ 838 @Nullable 839 public Drawable getDrawableForDensity(int id, int density, @Nullable Theme theme) { 840 TypedValue value; 841 synchronized (mAccessLock) { 842 value = mTmpValue; 843 if (value == null) { 844 value = new TypedValue(); 845 } else { 846 mTmpValue = null; 847 } 848 getValueForDensity(id, density, value, true); 849 850 /* 851 * Pretend the requested density is actually the display density. If 852 * the drawable returned is not the requested density, then force it 853 * to be scaled later by dividing its density by the ratio of 854 * requested density to actual device density. Drawables that have 855 * undefined density or no density don't need to be handled here. 856 */ 857 if (value.density > 0 && value.density != TypedValue.DENSITY_NONE) { 858 if (value.density == density) { 859 value.density = mMetrics.densityDpi; 860 } else { 861 value.density = (value.density * mMetrics.densityDpi) / density; 862 } 863 } 864 } 865 866 final Drawable res = loadDrawable(value, id, theme); 867 synchronized (mAccessLock) { 868 if (mTmpValue == null) { 869 mTmpValue = value; 870 } 871 } 872 return res; 873 } 874 875 /** 876 * Return a movie object associated with the particular resource ID. 877 * @param id The desired resource identifier, as generated by the aapt 878 * tool. This integer encodes the package, type, and resource 879 * entry. The value 0 is an invalid identifier. 880 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 881 * 882 */ 883 public Movie getMovie(int id) throws NotFoundException { 884 InputStream is = openRawResource(id); 885 Movie movie = Movie.decodeStream(is); 886 try { 887 is.close(); 888 } 889 catch (java.io.IOException e) { 890 // don't care, since the return value is valid 891 } 892 return movie; 893 } 894 895 /** 896 * Returns a color integer associated with a particular resource ID. If the 897 * resource holds a complex {@link ColorStateList}, then the default color 898 * from the set is returned. 899 * 900 * @param id The desired resource identifier, as generated by the aapt 901 * tool. This integer encodes the package, type, and resource 902 * entry. The value 0 is an invalid identifier. 903 * 904 * @throws NotFoundException Throws NotFoundException if the given ID does 905 * not exist. 906 * 907 * @return A single color value in the form 0xAARRGGBB. 908 * @deprecated Use {@link #getColor(int, Theme)} instead. 909 */ 910 public int getColor(int id) throws NotFoundException { 911 return getColor(id, null); 912 } 913 914 /** 915 * Returns a themed color integer associated with a particular resource ID. 916 * If the resource holds a complex {@link ColorStateList}, then the default 917 * color from the set is returned. 918 * 919 * @param id The desired resource identifier, as generated by the aapt 920 * tool. This integer encodes the package, type, and resource 921 * entry. The value 0 is an invalid identifier. 922 * @param theme The theme used to style the color attributes, may be 923 * {@code null}. 924 * 925 * @throws NotFoundException Throws NotFoundException if the given ID does 926 * not exist. 927 * 928 * @return A single color value in the form 0xAARRGGBB. 929 */ 930 public int getColor(int id, @Nullable Theme theme) throws NotFoundException { 931 TypedValue value; 932 synchronized (mAccessLock) { 933 value = mTmpValue; 934 if (value == null) { 935 value = new TypedValue(); 936 } 937 getValue(id, value, true); 938 if (value.type >= TypedValue.TYPE_FIRST_INT 939 && value.type <= TypedValue.TYPE_LAST_INT) { 940 mTmpValue = value; 941 return value.data; 942 } else if (value.type != TypedValue.TYPE_STRING) { 943 throw new NotFoundException( 944 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 945 + Integer.toHexString(value.type) + " is not valid"); 946 } 947 mTmpValue = null; 948 } 949 950 final ColorStateList csl = loadColorStateList(value, id, theme); 951 synchronized (mAccessLock) { 952 if (mTmpValue == null) { 953 mTmpValue = value; 954 } 955 } 956 957 return csl.getDefaultColor(); 958 } 959 960 /** 961 * Returns a color state list associated with a particular resource ID. The 962 * resource may contain either a single raw color value or a complex 963 * {@link ColorStateList} holding multiple possible colors. 964 * 965 * @param id The desired resource identifier of a {@link ColorStateList}, 966 * as generated by the aapt tool. This integer encodes the 967 * package, type, and resource entry. The value 0 is an invalid 968 * identifier. 969 * 970 * @throws NotFoundException Throws NotFoundException if the given ID does 971 * not exist. 972 * 973 * @return A ColorStateList object containing either a single solid color 974 * or multiple colors that can be selected based on a state. 975 * @deprecated Use {@link #getColorStateList(int, Theme)} instead. 976 */ 977 @Nullable 978 public ColorStateList getColorStateList(int id) throws NotFoundException { 979 final ColorStateList csl = getColorStateList(id, null); 980 if (csl != null && csl.canApplyTheme()) { 981 Log.w(TAG, "ColorStateList " + getResourceName(id) + " has " 982 + "unresolved theme attributes! Consider using " 983 + "Resources.getColorStateList(int, Theme) or " 984 + "Context.getColorStateList(int).", new RuntimeException()); 985 } 986 return csl; 987 } 988 989 /** 990 * Returns a themed color state list associated with a particular resource 991 * ID. The resource may contain either a single raw color value or a 992 * complex {@link ColorStateList} holding multiple possible colors. 993 * 994 * @param id The desired resource identifier of a {@link ColorStateList}, 995 * as generated by the aapt tool. This integer encodes the 996 * package, type, and resource entry. The value 0 is an invalid 997 * identifier. 998 * @param theme The theme used to style the color attributes, may be 999 * {@code null}. 1000 * 1001 * @throws NotFoundException Throws NotFoundException if the given ID does 1002 * not exist. 1003 * 1004 * @return A themed ColorStateList object containing either a single solid 1005 * color or multiple colors that can be selected based on a state. 1006 */ 1007 @Nullable 1008 public ColorStateList getColorStateList(int id, @Nullable Theme theme) 1009 throws NotFoundException { 1010 TypedValue value; 1011 synchronized (mAccessLock) { 1012 value = mTmpValue; 1013 if (value == null) { 1014 value = new TypedValue(); 1015 } else { 1016 mTmpValue = null; 1017 } 1018 getValue(id, value, true); 1019 } 1020 1021 final ColorStateList res = loadColorStateList(value, id, theme); 1022 synchronized (mAccessLock) { 1023 if (mTmpValue == null) { 1024 mTmpValue = value; 1025 } 1026 } 1027 1028 return res; 1029 } 1030 1031 1032 1033 /** 1034 * Return a boolean associated with a particular resource ID. This can be 1035 * used with any integral resource value, and will return true if it is 1036 * non-zero. 1037 * 1038 * @param id The desired resource identifier, as generated by the aapt 1039 * tool. This integer encodes the package, type, and resource 1040 * entry. The value 0 is an invalid identifier. 1041 * 1042 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1043 * 1044 * @return Returns the boolean value contained in the resource. 1045 */ 1046 public boolean getBoolean(int id) throws NotFoundException { 1047 synchronized (mAccessLock) { 1048 TypedValue value = mTmpValue; 1049 if (value == null) { 1050 mTmpValue = value = new TypedValue(); 1051 } 1052 getValue(id, value, true); 1053 if (value.type >= TypedValue.TYPE_FIRST_INT 1054 && value.type <= TypedValue.TYPE_LAST_INT) { 1055 return value.data != 0; 1056 } 1057 throw new NotFoundException( 1058 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 1059 + Integer.toHexString(value.type) + " is not valid"); 1060 } 1061 } 1062 1063 /** 1064 * Return an integer associated with a particular resource ID. 1065 * 1066 * @param id The desired resource identifier, as generated by the aapt 1067 * tool. This integer encodes the package, type, and resource 1068 * entry. The value 0 is an invalid identifier. 1069 * 1070 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1071 * 1072 * @return Returns the integer value contained in the resource. 1073 */ 1074 public int getInteger(int id) throws NotFoundException { 1075 synchronized (mAccessLock) { 1076 TypedValue value = mTmpValue; 1077 if (value == null) { 1078 mTmpValue = value = new TypedValue(); 1079 } 1080 getValue(id, value, true); 1081 if (value.type >= TypedValue.TYPE_FIRST_INT 1082 && value.type <= TypedValue.TYPE_LAST_INT) { 1083 return value.data; 1084 } 1085 throw new NotFoundException( 1086 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 1087 + Integer.toHexString(value.type) + " is not valid"); 1088 } 1089 } 1090 1091 /** 1092 * Retrieve a floating-point value for a particular resource ID. 1093 * 1094 * @param id The desired resource identifier, as generated by the aapt 1095 * tool. This integer encodes the package, type, and resource 1096 * entry. The value 0 is an invalid identifier. 1097 * 1098 * @return Returns the floating-point value contained in the resource. 1099 * 1100 * @throws NotFoundException Throws NotFoundException if the given ID does 1101 * not exist or is not a floating-point value. 1102 * @hide Pending API council approval. 1103 */ 1104 public float getFloat(int id) { 1105 synchronized (mAccessLock) { 1106 TypedValue value = mTmpValue; 1107 if (value == null) { 1108 mTmpValue = value = new TypedValue(); 1109 } 1110 getValue(id, value, true); 1111 if (value.type == TypedValue.TYPE_FLOAT) { 1112 return value.getFloat(); 1113 } 1114 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id) + " type #0x" 1115 + Integer.toHexString(value.type) + " is not valid"); 1116 } 1117 } 1118 1119 /** 1120 * Return an XmlResourceParser through which you can read a view layout 1121 * description for the given resource ID. This parser has limited 1122 * functionality -- in particular, you can't change its input, and only 1123 * the high-level events are available. 1124 * 1125 * <p>This function is really a simple wrapper for calling 1126 * {@link #getXml} with a layout resource. 1127 * 1128 * @param id The desired resource identifier, as generated by the aapt 1129 * tool. This integer encodes the package, type, and resource 1130 * entry. The value 0 is an invalid identifier. 1131 * 1132 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1133 * 1134 * @return A new parser object through which you can read 1135 * the XML data. 1136 * 1137 * @see #getXml 1138 */ 1139 public XmlResourceParser getLayout(int id) throws NotFoundException { 1140 return loadXmlResourceParser(id, "layout"); 1141 } 1142 1143 /** 1144 * Return an XmlResourceParser through which you can read an animation 1145 * description for the given resource ID. This parser has limited 1146 * functionality -- in particular, you can't change its input, and only 1147 * the high-level events are available. 1148 * 1149 * <p>This function is really a simple wrapper for calling 1150 * {@link #getXml} with an animation resource. 1151 * 1152 * @param id The desired resource identifier, as generated by the aapt 1153 * tool. This integer encodes the package, type, and resource 1154 * entry. The value 0 is an invalid identifier. 1155 * 1156 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1157 * 1158 * @return A new parser object through which you can read 1159 * the XML data. 1160 * 1161 * @see #getXml 1162 */ 1163 public XmlResourceParser getAnimation(int id) throws NotFoundException { 1164 return loadXmlResourceParser(id, "anim"); 1165 } 1166 1167 /** 1168 * Return an XmlResourceParser through which you can read a generic XML 1169 * resource for the given resource ID. 1170 * 1171 * <p>The XmlPullParser implementation returned here has some limited 1172 * functionality. In particular, you can't change its input, and only 1173 * high-level parsing events are available (since the document was 1174 * pre-parsed for you at build time, which involved merging text and 1175 * stripping comments). 1176 * 1177 * @param id The desired resource identifier, as generated by the aapt 1178 * tool. This integer encodes the package, type, and resource 1179 * entry. The value 0 is an invalid identifier. 1180 * 1181 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1182 * 1183 * @return A new parser object through which you can read 1184 * the XML data. 1185 * 1186 * @see android.util.AttributeSet 1187 */ 1188 public XmlResourceParser getXml(int id) throws NotFoundException { 1189 return loadXmlResourceParser(id, "xml"); 1190 } 1191 1192 /** 1193 * Open a data stream for reading a raw resource. This can only be used 1194 * with resources whose value is the name of an asset files -- that is, it can be 1195 * used to open drawable, sound, and raw resources; it will fail on string 1196 * and color resources. 1197 * 1198 * @param id The resource identifier to open, as generated by the appt 1199 * tool. 1200 * 1201 * @return InputStream Access to the resource data. 1202 * 1203 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1204 * 1205 */ 1206 public InputStream openRawResource(int id) throws NotFoundException { 1207 TypedValue value; 1208 synchronized (mAccessLock) { 1209 value = mTmpValue; 1210 if (value == null) { 1211 value = new TypedValue(); 1212 } else { 1213 mTmpValue = null; 1214 } 1215 } 1216 InputStream res = openRawResource(id, value); 1217 synchronized (mAccessLock) { 1218 if (mTmpValue == null) { 1219 mTmpValue = value; 1220 } 1221 } 1222 return res; 1223 } 1224 1225 /** 1226 * Open a data stream for reading a raw resource. This can only be used 1227 * with resources whose value is the name of an asset file -- that is, it can be 1228 * used to open drawable, sound, and raw resources; it will fail on string 1229 * and color resources. 1230 * 1231 * @param id The resource identifier to open, as generated by the appt tool. 1232 * @param value The TypedValue object to hold the resource information. 1233 * 1234 * @return InputStream Access to the resource data. 1235 * 1236 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1237 */ 1238 public InputStream openRawResource(int id, TypedValue value) throws NotFoundException { 1239 getValue(id, value, true); 1240 1241 try { 1242 return mAssets.openNonAsset(value.assetCookie, value.string.toString(), 1243 AssetManager.ACCESS_STREAMING); 1244 } catch (Exception e) { 1245 NotFoundException rnf = new NotFoundException("File " + value.string.toString() + 1246 " from drawable resource ID #0x" + Integer.toHexString(id)); 1247 rnf.initCause(e); 1248 throw rnf; 1249 } 1250 } 1251 1252 /** 1253 * Open a file descriptor for reading a raw resource. This can only be used 1254 * with resources whose value is the name of an asset files -- that is, it can be 1255 * used to open drawable, sound, and raw resources; it will fail on string 1256 * and color resources. 1257 * 1258 * <p>This function only works for resources that are stored in the package 1259 * as uncompressed data, which typically includes things like mp3 files 1260 * and png images. 1261 * 1262 * @param id The resource identifier to open, as generated by the appt 1263 * tool. 1264 * 1265 * @return AssetFileDescriptor A new file descriptor you can use to read 1266 * the resource. This includes the file descriptor itself, as well as the 1267 * offset and length of data where the resource appears in the file. A 1268 * null is returned if the file exists but is compressed. 1269 * 1270 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1271 * 1272 */ 1273 public AssetFileDescriptor openRawResourceFd(int id) throws NotFoundException { 1274 TypedValue value; 1275 synchronized (mAccessLock) { 1276 value = mTmpValue; 1277 if (value == null) { 1278 value = new TypedValue(); 1279 } else { 1280 mTmpValue = null; 1281 } 1282 getValue(id, value, true); 1283 } 1284 try { 1285 return mAssets.openNonAssetFd( 1286 value.assetCookie, value.string.toString()); 1287 } catch (Exception e) { 1288 NotFoundException rnf = new NotFoundException( 1289 "File " + value.string.toString() 1290 + " from drawable resource ID #0x" 1291 + Integer.toHexString(id)); 1292 rnf.initCause(e); 1293 throw rnf; 1294 } finally { 1295 synchronized (mAccessLock) { 1296 if (mTmpValue == null) { 1297 mTmpValue = value; 1298 } 1299 } 1300 } 1301 } 1302 1303 /** 1304 * Return the raw data associated with a particular resource ID. 1305 * 1306 * @param id The desired resource identifier, as generated by the aapt 1307 * tool. This integer encodes the package, type, and resource 1308 * entry. The value 0 is an invalid identifier. 1309 * @param outValue Object in which to place the resource data. 1310 * @param resolveRefs If true, a resource that is a reference to another 1311 * resource will be followed so that you receive the 1312 * actual final resource data. If false, the TypedValue 1313 * will be filled in with the reference itself. 1314 * 1315 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1316 * 1317 */ 1318 public void getValue(int id, TypedValue outValue, boolean resolveRefs) 1319 throws NotFoundException { 1320 boolean found = mAssets.getResourceValue(id, 0, outValue, resolveRefs); 1321 if (found) { 1322 return; 1323 } 1324 throw new NotFoundException("Resource ID #0x" 1325 + Integer.toHexString(id)); 1326 } 1327 1328 /** 1329 * Get the raw value associated with a resource with associated density. 1330 * 1331 * @param id resource identifier 1332 * @param density density in DPI 1333 * @param resolveRefs If true, a resource that is a reference to another 1334 * resource will be followed so that you receive the actual final 1335 * resource data. If false, the TypedValue will be filled in with 1336 * the reference itself. 1337 * @throws NotFoundException Throws NotFoundException if the given ID does 1338 * not exist. 1339 * @see #getValue(String, TypedValue, boolean) 1340 */ 1341 public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs) 1342 throws NotFoundException { 1343 boolean found = mAssets.getResourceValue(id, density, outValue, resolveRefs); 1344 if (found) { 1345 return; 1346 } 1347 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)); 1348 } 1349 1350 /** 1351 * Return the raw data associated with a particular resource ID. 1352 * See getIdentifier() for information on how names are mapped to resource 1353 * IDs, and getString(int) for information on how string resources are 1354 * retrieved. 1355 * 1356 * <p>Note: use of this function is discouraged. It is much more 1357 * efficient to retrieve resources by identifier than by name. 1358 * 1359 * @param name The name of the desired resource. This is passed to 1360 * getIdentifier() with a default type of "string". 1361 * @param outValue Object in which to place the resource data. 1362 * @param resolveRefs If true, a resource that is a reference to another 1363 * resource will be followed so that you receive the 1364 * actual final resource data. If false, the TypedValue 1365 * will be filled in with the reference itself. 1366 * 1367 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1368 * 1369 */ 1370 public void getValue(String name, TypedValue outValue, boolean resolveRefs) 1371 throws NotFoundException { 1372 int id = getIdentifier(name, "string", null); 1373 if (id != 0) { 1374 getValue(id, outValue, resolveRefs); 1375 return; 1376 } 1377 throw new NotFoundException("String resource name " + name); 1378 } 1379 1380 /** 1381 * This class holds the current attribute values for a particular theme. 1382 * In other words, a Theme is a set of values for resource attributes; 1383 * these are used in conjunction with {@link TypedArray} 1384 * to resolve the final value for an attribute. 1385 * 1386 * <p>The Theme's attributes come into play in two ways: (1) a styled 1387 * attribute can explicit reference a value in the theme through the 1388 * "?themeAttribute" syntax; (2) if no value has been defined for a 1389 * particular styled attribute, as a last resort we will try to find that 1390 * attribute's value in the Theme. 1391 * 1392 * <p>You will normally use the {@link #obtainStyledAttributes} APIs to 1393 * retrieve XML attributes with style and theme information applied. 1394 */ 1395 public final class Theme { 1396 /** 1397 * Place new attribute values into the theme. The style resource 1398 * specified by <var>resid</var> will be retrieved from this Theme's 1399 * resources, its values placed into the Theme object. 1400 * 1401 * <p>The semantics of this function depends on the <var>force</var> 1402 * argument: If false, only values that are not already defined in 1403 * the theme will be copied from the system resource; otherwise, if 1404 * any of the style's attributes are already defined in the theme, the 1405 * current values in the theme will be overwritten. 1406 * 1407 * @param resId The resource ID of a style resource from which to 1408 * obtain attribute values. 1409 * @param force If true, values in the style resource will always be 1410 * used in the theme; otherwise, they will only be used 1411 * if not already defined in the theme. 1412 */ 1413 public void applyStyle(int resId, boolean force) { 1414 AssetManager.applyThemeStyle(mTheme, resId, force); 1415 1416 mThemeResId = resId; 1417 mKey += Integer.toHexString(resId) + (force ? "! " : " "); 1418 } 1419 1420 /** 1421 * Set this theme to hold the same contents as the theme 1422 * <var>other</var>. If both of these themes are from the same 1423 * Resources object, they will be identical after this function 1424 * returns. If they are from different Resources, only the resources 1425 * they have in common will be set in this theme. 1426 * 1427 * @param other The existing Theme to copy from. 1428 */ 1429 public void setTo(Theme other) { 1430 AssetManager.copyTheme(mTheme, other.mTheme); 1431 1432 mThemeResId = other.mThemeResId; 1433 mKey = other.mKey; 1434 } 1435 1436 /** 1437 * Return a TypedArray holding the values defined by 1438 * <var>Theme</var> which are listed in <var>attrs</var>. 1439 * 1440 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1441 * with the array. 1442 * 1443 * @param attrs The desired attributes. 1444 * 1445 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1446 * 1447 * @return Returns a TypedArray holding an array of the attribute values. 1448 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1449 * when done with it. 1450 * 1451 * @see Resources#obtainAttributes 1452 * @see #obtainStyledAttributes(int, int[]) 1453 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1454 */ 1455 public TypedArray obtainStyledAttributes(int[] attrs) { 1456 final int len = attrs.length; 1457 final TypedArray array = TypedArray.obtain(Resources.this, len); 1458 array.mTheme = this; 1459 AssetManager.applyStyle(mTheme, 0, 0, 0, attrs, array.mData, array.mIndices); 1460 return array; 1461 } 1462 1463 /** 1464 * Return a TypedArray holding the values defined by the style 1465 * resource <var>resid</var> which are listed in <var>attrs</var>. 1466 * 1467 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1468 * with the array. 1469 * 1470 * @param resid The desired style resource. 1471 * @param attrs The desired attributes in the style. 1472 * 1473 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1474 * 1475 * @return Returns a TypedArray holding an array of the attribute values. 1476 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1477 * when done with it. 1478 * 1479 * @see Resources#obtainAttributes 1480 * @see #obtainStyledAttributes(int[]) 1481 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1482 */ 1483 public TypedArray obtainStyledAttributes(int resid, int[] attrs) throws NotFoundException { 1484 final int len = attrs.length; 1485 final TypedArray array = TypedArray.obtain(Resources.this, len); 1486 array.mTheme = this; 1487 if (false) { 1488 int[] data = array.mData; 1489 1490 System.out.println("**********************************************************"); 1491 System.out.println("**********************************************************"); 1492 System.out.println("**********************************************************"); 1493 System.out.println("Attributes:"); 1494 String s = " Attrs:"; 1495 int i; 1496 for (i=0; i<attrs.length; i++) { 1497 s = s + " 0x" + Integer.toHexString(attrs[i]); 1498 } 1499 System.out.println(s); 1500 s = " Found:"; 1501 TypedValue value = new TypedValue(); 1502 for (i=0; i<attrs.length; i++) { 1503 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1504 value.type = data[d+AssetManager.STYLE_TYPE]; 1505 value.data = data[d+AssetManager.STYLE_DATA]; 1506 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1507 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1508 s = s + " 0x" + Integer.toHexString(attrs[i]) 1509 + "=" + value; 1510 } 1511 System.out.println(s); 1512 } 1513 AssetManager.applyStyle(mTheme, 0, resid, 0, attrs, array.mData, array.mIndices); 1514 return array; 1515 } 1516 1517 /** 1518 * Return a TypedArray holding the attribute values in 1519 * <var>set</var> 1520 * that are listed in <var>attrs</var>. In addition, if the given 1521 * AttributeSet specifies a style class (through the "style" attribute), 1522 * that style will be applied on top of the base attributes it defines. 1523 * 1524 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1525 * with the array. 1526 * 1527 * <p>When determining the final value of a particular attribute, there 1528 * are four inputs that come into play:</p> 1529 * 1530 * <ol> 1531 * <li> Any attribute values in the given AttributeSet. 1532 * <li> The style resource specified in the AttributeSet (named 1533 * "style"). 1534 * <li> The default style specified by <var>defStyleAttr</var> and 1535 * <var>defStyleRes</var> 1536 * <li> The base values in this theme. 1537 * </ol> 1538 * 1539 * <p>Each of these inputs is considered in-order, with the first listed 1540 * taking precedence over the following ones. In other words, if in the 1541 * AttributeSet you have supplied <code><Button 1542 * textColor="#ff000000"></code>, then the button's text will 1543 * <em>always</em> be black, regardless of what is specified in any of 1544 * the styles. 1545 * 1546 * @param set The base set of attribute values. May be null. 1547 * @param attrs The desired attributes to be retrieved. 1548 * @param defStyleAttr An attribute in the current theme that contains a 1549 * reference to a style resource that supplies 1550 * defaults values for the TypedArray. Can be 1551 * 0 to not look for defaults. 1552 * @param defStyleRes A resource identifier of a style resource that 1553 * supplies default values for the TypedArray, 1554 * used only if defStyleAttr is 0 or can not be found 1555 * in the theme. Can be 0 to not look for defaults. 1556 * 1557 * @return Returns a TypedArray holding an array of the attribute values. 1558 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1559 * when done with it. 1560 * 1561 * @see Resources#obtainAttributes 1562 * @see #obtainStyledAttributes(int[]) 1563 * @see #obtainStyledAttributes(int, int[]) 1564 */ 1565 public TypedArray obtainStyledAttributes(AttributeSet set, 1566 int[] attrs, int defStyleAttr, int defStyleRes) { 1567 final int len = attrs.length; 1568 final TypedArray array = TypedArray.obtain(Resources.this, len); 1569 1570 // XXX note that for now we only work with compiled XML files. 1571 // To support generic XML files we will need to manually parse 1572 // out the attributes from the XML file (applying type information 1573 // contained in the resources and such). 1574 final XmlBlock.Parser parser = (XmlBlock.Parser)set; 1575 AssetManager.applyStyle(mTheme, defStyleAttr, defStyleRes, 1576 parser != null ? parser.mParseState : 0, attrs, array.mData, array.mIndices); 1577 1578 array.mTheme = this; 1579 array.mXml = parser; 1580 1581 if (false) { 1582 int[] data = array.mData; 1583 1584 System.out.println("Attributes:"); 1585 String s = " Attrs:"; 1586 int i; 1587 for (i=0; i<set.getAttributeCount(); i++) { 1588 s = s + " " + set.getAttributeName(i); 1589 int id = set.getAttributeNameResource(i); 1590 if (id != 0) { 1591 s = s + "(0x" + Integer.toHexString(id) + ")"; 1592 } 1593 s = s + "=" + set.getAttributeValue(i); 1594 } 1595 System.out.println(s); 1596 s = " Found:"; 1597 TypedValue value = new TypedValue(); 1598 for (i=0; i<attrs.length; i++) { 1599 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1600 value.type = data[d+AssetManager.STYLE_TYPE]; 1601 value.data = data[d+AssetManager.STYLE_DATA]; 1602 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1603 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1604 s = s + " 0x" + Integer.toHexString(attrs[i]) 1605 + "=" + value; 1606 } 1607 System.out.println(s); 1608 } 1609 1610 return array; 1611 } 1612 1613 /** 1614 * Retrieve the values for a set of attributes in the Theme. The 1615 * contents of the typed array are ultimately filled in by 1616 * {@link Resources#getValue}. 1617 * 1618 * @param values The base set of attribute values, must be equal in 1619 * length to {@code attrs}. All values must be of type 1620 * {@link TypedValue#TYPE_ATTRIBUTE}. 1621 * @param attrs The desired attributes to be retrieved. 1622 * @return Returns a TypedArray holding an array of the attribute 1623 * values. Be sure to call {@link TypedArray#recycle()} 1624 * when done with it. 1625 * @hide 1626 */ 1627 @NonNull 1628 public TypedArray resolveAttributes(@NonNull int[] values, @NonNull int[] attrs) { 1629 final int len = attrs.length; 1630 if (values == null || len != values.length) { 1631 throw new IllegalArgumentException( 1632 "Base attribute values must the same length as attrs"); 1633 } 1634 1635 final TypedArray array = TypedArray.obtain(Resources.this, len); 1636 AssetManager.resolveAttrs(mTheme, 0, 0, values, attrs, array.mData, array.mIndices); 1637 array.mTheme = this; 1638 array.mXml = null; 1639 1640 return array; 1641 } 1642 1643 /** 1644 * Retrieve the value of an attribute in the Theme. The contents of 1645 * <var>outValue</var> are ultimately filled in by 1646 * {@link Resources#getValue}. 1647 * 1648 * @param resid The resource identifier of the desired theme 1649 * attribute. 1650 * @param outValue Filled in with the ultimate resource value supplied 1651 * by the attribute. 1652 * @param resolveRefs If true, resource references will be walked; if 1653 * false, <var>outValue</var> may be a 1654 * TYPE_REFERENCE. In either case, it will never 1655 * be a TYPE_ATTRIBUTE. 1656 * 1657 * @return boolean Returns true if the attribute was found and 1658 * <var>outValue</var> is valid, else false. 1659 */ 1660 public boolean resolveAttribute(int resid, TypedValue outValue, boolean resolveRefs) { 1661 boolean got = mAssets.getThemeValue(mTheme, resid, outValue, resolveRefs); 1662 if (false) { 1663 System.out.println( 1664 "resolveAttribute #" + Integer.toHexString(resid) 1665 + " got=" + got + ", type=0x" + Integer.toHexString(outValue.type) 1666 + ", data=0x" + Integer.toHexString(outValue.data)); 1667 } 1668 return got; 1669 } 1670 1671 /** 1672 * Gets all of the attribute ids associated with this {@link Theme}. For debugging only. 1673 * 1674 * @return The int array containing attribute ids associated with this {@link Theme}. 1675 * @hide 1676 */ 1677 public int[] getAllAttributes() { 1678 return mAssets.getStyleAttributes(getAppliedStyleResId()); 1679 } 1680 1681 /** 1682 * Returns the resources to which this theme belongs. 1683 * 1684 * @return Resources to which this theme belongs. 1685 */ 1686 public Resources getResources() { 1687 return Resources.this; 1688 } 1689 1690 /** 1691 * Return a drawable object associated with a particular resource ID 1692 * and styled for the Theme. 1693 * 1694 * @param id The desired resource identifier, as generated by the aapt 1695 * tool. This integer encodes the package, type, and resource 1696 * entry. The value 0 is an invalid identifier. 1697 * @return Drawable An object that can be used to draw this resource. 1698 * @throws NotFoundException Throws NotFoundException if the given ID 1699 * does not exist. 1700 */ 1701 public Drawable getDrawable(int id) throws NotFoundException { 1702 return Resources.this.getDrawable(id, this); 1703 } 1704 1705 /** 1706 * Print contents of this theme out to the log. For debugging only. 1707 * 1708 * @param priority The log priority to use. 1709 * @param tag The log tag to use. 1710 * @param prefix Text to prefix each line printed. 1711 */ 1712 public void dump(int priority, String tag, String prefix) { 1713 AssetManager.dumpTheme(mTheme, priority, tag, prefix); 1714 } 1715 1716 @Override 1717 protected void finalize() throws Throwable { 1718 super.finalize(); 1719 mAssets.releaseTheme(mTheme); 1720 } 1721 1722 /*package*/ Theme() { 1723 mAssets = Resources.this.mAssets; 1724 mTheme = mAssets.createTheme(); 1725 } 1726 1727 @SuppressWarnings("hiding") 1728 private final AssetManager mAssets; 1729 private final long mTheme; 1730 1731 /** Resource identifier for the theme. */ 1732 private int mThemeResId = 0; 1733 1734 /** Unique key for the series of styles applied to this theme. */ 1735 private String mKey = ""; 1736 1737 // Needed by layoutlib. 1738 /*package*/ long getNativeTheme() { 1739 return mTheme; 1740 } 1741 1742 /*package*/ int getAppliedStyleResId() { 1743 return mThemeResId; 1744 } 1745 1746 /*package*/ String getKey() { 1747 return mKey; 1748 } 1749 1750 private String getResourceNameFromHexString(String hexString) { 1751 return getResourceName(Integer.parseInt(hexString, 16)); 1752 } 1753 1754 /** 1755 * Parses {@link #mKey} and returns a String array that holds pairs of adjacent Theme data: 1756 * resource name followed by whether or not it was forced, as specified by 1757 * {@link #applyStyle(int, boolean)}. 1758 * 1759 * @hide 1760 */ 1761 @ViewDebug.ExportedProperty(category = "theme", hasAdjacentMapping = true) 1762 public String[] getTheme() { 1763 String[] themeData = mKey.split(" "); 1764 String[] themes = new String[themeData.length * 2]; 1765 String theme; 1766 boolean forced; 1767 1768 for (int i = 0, j = themeData.length - 1; i < themes.length; i += 2, --j) { 1769 theme = themeData[j]; 1770 forced = theme.endsWith("!"); 1771 themes[i] = forced ? 1772 getResourceNameFromHexString(theme.substring(0, theme.length() - 1)) : 1773 getResourceNameFromHexString(theme); 1774 themes[i + 1] = forced ? "forced" : "not forced"; 1775 } 1776 return themes; 1777 } 1778 } 1779 1780 /** 1781 * Generate a new Theme object for this set of Resources. It initially 1782 * starts out empty. 1783 * 1784 * @return Theme The newly created Theme container. 1785 */ 1786 public final Theme newTheme() { 1787 return new Theme(); 1788 } 1789 1790 /** 1791 * Retrieve a set of basic attribute values from an AttributeSet, not 1792 * performing styling of them using a theme and/or style resources. 1793 * 1794 * @param set The current attribute values to retrieve. 1795 * @param attrs The specific attributes to be retrieved. 1796 * @return Returns a TypedArray holding an array of the attribute values. 1797 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1798 * when done with it. 1799 * 1800 * @see Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 1801 */ 1802 public TypedArray obtainAttributes(AttributeSet set, int[] attrs) { 1803 int len = attrs.length; 1804 TypedArray array = TypedArray.obtain(this, len); 1805 1806 // XXX note that for now we only work with compiled XML files. 1807 // To support generic XML files we will need to manually parse 1808 // out the attributes from the XML file (applying type information 1809 // contained in the resources and such). 1810 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1811 mAssets.retrieveAttributes(parser.mParseState, attrs, 1812 array.mData, array.mIndices); 1813 1814 array.mXml = parser; 1815 1816 return array; 1817 } 1818 1819 /** 1820 * Store the newly updated configuration. 1821 */ 1822 public void updateConfiguration(Configuration config, 1823 DisplayMetrics metrics) { 1824 updateConfiguration(config, metrics, null); 1825 } 1826 1827 /** 1828 * @hide 1829 */ 1830 public void updateConfiguration(Configuration config, 1831 DisplayMetrics metrics, CompatibilityInfo compat) { 1832 synchronized (mAccessLock) { 1833 if (false) { 1834 Slog.i(TAG, "**** Updating config of " + this + ": old config is " 1835 + mConfiguration + " old compat is " + mCompatibilityInfo); 1836 Slog.i(TAG, "**** Updating config of " + this + ": new config is " 1837 + config + " new compat is " + compat); 1838 } 1839 if (compat != null) { 1840 mCompatibilityInfo = compat; 1841 } 1842 if (metrics != null) { 1843 mMetrics.setTo(metrics); 1844 } 1845 // NOTE: We should re-arrange this code to create a Display 1846 // with the CompatibilityInfo that is used everywhere we deal 1847 // with the display in relation to this app, rather than 1848 // doing the conversion here. This impl should be okay because 1849 // we make sure to return a compatible display in the places 1850 // where there are public APIs to retrieve the display... but 1851 // it would be cleaner and more maintainble to just be 1852 // consistently dealing with a compatible display everywhere in 1853 // the framework. 1854 mCompatibilityInfo.applyToDisplayMetrics(mMetrics); 1855 1856 int configChanges = calcConfigChanges(config); 1857 if (mConfiguration.locale == null) { 1858 mConfiguration.locale = Locale.getDefault(); 1859 mConfiguration.setLayoutDirection(mConfiguration.locale); 1860 } 1861 if (mConfiguration.densityDpi != Configuration.DENSITY_DPI_UNDEFINED) { 1862 mMetrics.densityDpi = mConfiguration.densityDpi; 1863 mMetrics.density = mConfiguration.densityDpi * DisplayMetrics.DENSITY_DEFAULT_SCALE; 1864 } 1865 mMetrics.scaledDensity = mMetrics.density * mConfiguration.fontScale; 1866 1867 String locale = null; 1868 if (mConfiguration.locale != null) { 1869 locale = adjustLanguageTag(mConfiguration.locale.toLanguageTag()); 1870 } 1871 int width, height; 1872 if (mMetrics.widthPixels >= mMetrics.heightPixels) { 1873 width = mMetrics.widthPixels; 1874 height = mMetrics.heightPixels; 1875 } else { 1876 //noinspection SuspiciousNameCombination 1877 width = mMetrics.heightPixels; 1878 //noinspection SuspiciousNameCombination 1879 height = mMetrics.widthPixels; 1880 } 1881 int keyboardHidden = mConfiguration.keyboardHidden; 1882 if (keyboardHidden == Configuration.KEYBOARDHIDDEN_NO 1883 && mConfiguration.hardKeyboardHidden 1884 == Configuration.HARDKEYBOARDHIDDEN_YES) { 1885 keyboardHidden = Configuration.KEYBOARDHIDDEN_SOFT; 1886 } 1887 mAssets.setConfiguration(mConfiguration.mcc, mConfiguration.mnc, 1888 locale, mConfiguration.orientation, 1889 mConfiguration.touchscreen, 1890 mConfiguration.densityDpi, mConfiguration.keyboard, 1891 keyboardHidden, mConfiguration.navigation, width, height, 1892 mConfiguration.smallestScreenWidthDp, 1893 mConfiguration.screenWidthDp, mConfiguration.screenHeightDp, 1894 mConfiguration.screenLayout, mConfiguration.uiMode, 1895 Build.VERSION.RESOURCES_SDK_INT); 1896 1897 if (DEBUG_CONFIG) { 1898 Slog.i(TAG, "**** Updating config of " + this + ": final config is " + mConfiguration 1899 + " final compat is " + mCompatibilityInfo); 1900 } 1901 1902 clearDrawableCachesLocked(mDrawableCache, configChanges); 1903 clearDrawableCachesLocked(mColorDrawableCache, configChanges); 1904 mColorStateListCache.onConfigurationChange(configChanges); 1905 mAnimatorCache.onConfigurationChange(configChanges); 1906 mStateListAnimatorCache.onConfigurationChange(configChanges); 1907 1908 flushLayoutCache(); 1909 } 1910 synchronized (sSync) { 1911 if (mPluralRule != null) { 1912 mPluralRule = NativePluralRules.forLocale(config.locale); 1913 } 1914 } 1915 } 1916 1917 /** 1918 * Called by ConfigurationBoundResourceCacheTest via reflection. 1919 */ 1920 private int calcConfigChanges(Configuration config) { 1921 int configChanges = 0xfffffff; 1922 if (config != null) { 1923 mTmpConfig.setTo(config); 1924 int density = config.densityDpi; 1925 if (density == Configuration.DENSITY_DPI_UNDEFINED) { 1926 density = mMetrics.noncompatDensityDpi; 1927 } 1928 1929 mCompatibilityInfo.applyToConfiguration(density, mTmpConfig); 1930 1931 if (mTmpConfig.locale == null) { 1932 mTmpConfig.locale = Locale.getDefault(); 1933 mTmpConfig.setLayoutDirection(mTmpConfig.locale); 1934 } 1935 configChanges = mConfiguration.updateFrom(mTmpConfig); 1936 configChanges = ActivityInfo.activityInfoConfigToNative(configChanges); 1937 } 1938 return configChanges; 1939 } 1940 1941 private void clearDrawableCachesLocked( 1942 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 1943 int configChanges) { 1944 final int N = caches.size(); 1945 for (int i = 0; i < N; i++) { 1946 clearDrawableCacheLocked(caches.valueAt(i), configChanges); 1947 } 1948 } 1949 1950 private void clearDrawableCacheLocked( 1951 LongSparseArray<WeakReference<ConstantState>> cache, int configChanges) { 1952 if (DEBUG_CONFIG) { 1953 Log.d(TAG, "Cleaning up drawables config changes: 0x" 1954 + Integer.toHexString(configChanges)); 1955 } 1956 final int N = cache.size(); 1957 for (int i = 0; i < N; i++) { 1958 final WeakReference<ConstantState> ref = cache.valueAt(i); 1959 if (ref != null) { 1960 final ConstantState cs = ref.get(); 1961 if (cs != null) { 1962 if (Configuration.needNewResources( 1963 configChanges, cs.getChangingConfigurations())) { 1964 if (DEBUG_CONFIG) { 1965 Log.d(TAG, "FLUSHING #0x" 1966 + Long.toHexString(cache.keyAt(i)) 1967 + " / " + cs + " with changes: 0x" 1968 + Integer.toHexString(cs.getChangingConfigurations())); 1969 } 1970 cache.setValueAt(i, null); 1971 } else if (DEBUG_CONFIG) { 1972 Log.d(TAG, "(Keeping #0x" 1973 + Long.toHexString(cache.keyAt(i)) 1974 + " / " + cs + " with changes: 0x" 1975 + Integer.toHexString(cs.getChangingConfigurations()) 1976 + ")"); 1977 } 1978 } 1979 } 1980 } 1981 } 1982 1983 /** 1984 * {@code Locale.toLanguageTag} will transform the obsolete (and deprecated) 1985 * language codes "in", "ji" and "iw" to "id", "yi" and "he" respectively. 1986 * 1987 * All released versions of android prior to "L" used the deprecated language 1988 * tags, so we will need to support them for backwards compatibility. 1989 * 1990 * Note that this conversion needs to take place *after* the call to 1991 * {@code toLanguageTag} because that will convert all the deprecated codes to 1992 * the new ones, even if they're set manually. 1993 */ 1994 private static String adjustLanguageTag(String languageTag) { 1995 final int separator = languageTag.indexOf('-'); 1996 final String language; 1997 final String remainder; 1998 1999 if (separator == -1) { 2000 language = languageTag; 2001 remainder = ""; 2002 } else { 2003 language = languageTag.substring(0, separator); 2004 remainder = languageTag.substring(separator); 2005 } 2006 2007 return Locale.adjustLanguageCode(language) + remainder; 2008 } 2009 2010 /** 2011 * Update the system resources configuration if they have previously 2012 * been initialized. 2013 * 2014 * @hide 2015 */ 2016 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics, 2017 CompatibilityInfo compat) { 2018 if (mSystem != null) { 2019 mSystem.updateConfiguration(config, metrics, compat); 2020 //Log.i(TAG, "Updated system resources " + mSystem 2021 // + ": " + mSystem.getConfiguration()); 2022 } 2023 } 2024 2025 /** 2026 * Return the current display metrics that are in effect for this resource 2027 * object. The returned object should be treated as read-only. 2028 * 2029 * @return The resource's current display metrics. 2030 */ 2031 public DisplayMetrics getDisplayMetrics() { 2032 if (DEBUG_CONFIG) Slog.v(TAG, "Returning DisplayMetrics: " + mMetrics.widthPixels 2033 + "x" + mMetrics.heightPixels + " " + mMetrics.density); 2034 return mMetrics; 2035 } 2036 2037 /** 2038 * Return the current configuration that is in effect for this resource 2039 * object. The returned object should be treated as read-only. 2040 * 2041 * @return The resource's current configuration. 2042 */ 2043 public Configuration getConfiguration() { 2044 return mConfiguration; 2045 } 2046 2047 /** 2048 * Return the compatibility mode information for the application. 2049 * The returned object should be treated as read-only. 2050 * 2051 * @return compatibility info. 2052 * @hide 2053 */ 2054 public CompatibilityInfo getCompatibilityInfo() { 2055 return mCompatibilityInfo; 2056 } 2057 2058 /** 2059 * This is just for testing. 2060 * @hide 2061 */ 2062 public void setCompatibilityInfo(CompatibilityInfo ci) { 2063 if (ci != null) { 2064 mCompatibilityInfo = ci; 2065 updateConfiguration(mConfiguration, mMetrics); 2066 } 2067 } 2068 2069 /** 2070 * Return a resource identifier for the given resource name. A fully 2071 * qualified resource name is of the form "package:type/entry". The first 2072 * two components (package and type) are optional if defType and 2073 * defPackage, respectively, are specified here. 2074 * 2075 * <p>Note: use of this function is discouraged. It is much more 2076 * efficient to retrieve resources by identifier than by name. 2077 * 2078 * @param name The name of the desired resource. 2079 * @param defType Optional default resource type to find, if "type/" is 2080 * not included in the name. Can be null to require an 2081 * explicit type. 2082 * @param defPackage Optional default package to find, if "package:" is 2083 * not included in the name. Can be null to require an 2084 * explicit package. 2085 * 2086 * @return int The associated resource identifier. Returns 0 if no such 2087 * resource was found. (0 is not a valid resource ID.) 2088 */ 2089 public int getIdentifier(String name, String defType, String defPackage) { 2090 if (name == null) { 2091 throw new NullPointerException("name is null"); 2092 } 2093 try { 2094 return Integer.parseInt(name); 2095 } catch (Exception e) { 2096 // Ignore 2097 } 2098 return mAssets.getResourceIdentifier(name, defType, defPackage); 2099 } 2100 2101 /** 2102 * Return true if given resource identifier includes a package. 2103 * 2104 * @hide 2105 */ 2106 public static boolean resourceHasPackage(int resid) { 2107 return (resid >>> 24) != 0; 2108 } 2109 2110 /** 2111 * Return the full name for a given resource identifier. This name is 2112 * a single string of the form "package:type/entry". 2113 * 2114 * @param resid The resource identifier whose name is to be retrieved. 2115 * 2116 * @return A string holding the name of the resource. 2117 * 2118 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2119 * 2120 * @see #getResourcePackageName 2121 * @see #getResourceTypeName 2122 * @see #getResourceEntryName 2123 */ 2124 public String getResourceName(int resid) throws NotFoundException { 2125 String str = mAssets.getResourceName(resid); 2126 if (str != null) return str; 2127 throw new NotFoundException("Unable to find resource ID #0x" 2128 + Integer.toHexString(resid)); 2129 } 2130 2131 /** 2132 * Return the package name for a given resource identifier. 2133 * 2134 * @param resid The resource identifier whose package name is to be 2135 * retrieved. 2136 * 2137 * @return A string holding the package name of the resource. 2138 * 2139 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2140 * 2141 * @see #getResourceName 2142 */ 2143 public String getResourcePackageName(int resid) throws NotFoundException { 2144 String str = mAssets.getResourcePackageName(resid); 2145 if (str != null) return str; 2146 throw new NotFoundException("Unable to find resource ID #0x" 2147 + Integer.toHexString(resid)); 2148 } 2149 2150 /** 2151 * Return the type name for a given resource identifier. 2152 * 2153 * @param resid The resource identifier whose type name is to be 2154 * retrieved. 2155 * 2156 * @return A string holding the type name of the resource. 2157 * 2158 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2159 * 2160 * @see #getResourceName 2161 */ 2162 public String getResourceTypeName(int resid) throws NotFoundException { 2163 String str = mAssets.getResourceTypeName(resid); 2164 if (str != null) return str; 2165 throw new NotFoundException("Unable to find resource ID #0x" 2166 + Integer.toHexString(resid)); 2167 } 2168 2169 /** 2170 * Return the entry name for a given resource identifier. 2171 * 2172 * @param resid The resource identifier whose entry name is to be 2173 * retrieved. 2174 * 2175 * @return A string holding the entry name of the resource. 2176 * 2177 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2178 * 2179 * @see #getResourceName 2180 */ 2181 public String getResourceEntryName(int resid) throws NotFoundException { 2182 String str = mAssets.getResourceEntryName(resid); 2183 if (str != null) return str; 2184 throw new NotFoundException("Unable to find resource ID #0x" 2185 + Integer.toHexString(resid)); 2186 } 2187 2188 /** 2189 * Parse a series of {@link android.R.styleable#Extra <extra>} tags from 2190 * an XML file. You call this when you are at the parent tag of the 2191 * extra tags, and it will return once all of the child tags have been parsed. 2192 * This will call {@link #parseBundleExtra} for each extra tag encountered. 2193 * 2194 * @param parser The parser from which to retrieve the extras. 2195 * @param outBundle A Bundle in which to place all parsed extras. 2196 * @throws XmlPullParserException 2197 * @throws IOException 2198 */ 2199 public void parseBundleExtras(XmlResourceParser parser, Bundle outBundle) 2200 throws XmlPullParserException, IOException { 2201 int outerDepth = parser.getDepth(); 2202 int type; 2203 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 2204 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 2205 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 2206 continue; 2207 } 2208 2209 String nodeName = parser.getName(); 2210 if (nodeName.equals("extra")) { 2211 parseBundleExtra("extra", parser, outBundle); 2212 XmlUtils.skipCurrentTag(parser); 2213 2214 } else { 2215 XmlUtils.skipCurrentTag(parser); 2216 } 2217 } 2218 } 2219 2220 /** 2221 * Parse a name/value pair out of an XML tag holding that data. The 2222 * AttributeSet must be holding the data defined by 2223 * {@link android.R.styleable#Extra}. The following value types are supported: 2224 * <ul> 2225 * <li> {@link TypedValue#TYPE_STRING}: 2226 * {@link Bundle#putCharSequence Bundle.putCharSequence()} 2227 * <li> {@link TypedValue#TYPE_INT_BOOLEAN}: 2228 * {@link Bundle#putCharSequence Bundle.putBoolean()} 2229 * <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}: 2230 * {@link Bundle#putCharSequence Bundle.putBoolean()} 2231 * <li> {@link TypedValue#TYPE_FLOAT}: 2232 * {@link Bundle#putCharSequence Bundle.putFloat()} 2233 * </ul> 2234 * 2235 * @param tagName The name of the tag these attributes come from; this is 2236 * only used for reporting error messages. 2237 * @param attrs The attributes from which to retrieve the name/value pair. 2238 * @param outBundle The Bundle in which to place the parsed value. 2239 * @throws XmlPullParserException If the attributes are not valid. 2240 */ 2241 public void parseBundleExtra(String tagName, AttributeSet attrs, 2242 Bundle outBundle) throws XmlPullParserException { 2243 TypedArray sa = obtainAttributes(attrs, 2244 com.android.internal.R.styleable.Extra); 2245 2246 String name = sa.getString( 2247 com.android.internal.R.styleable.Extra_name); 2248 if (name == null) { 2249 sa.recycle(); 2250 throw new XmlPullParserException("<" + tagName 2251 + "> requires an android:name attribute at " 2252 + attrs.getPositionDescription()); 2253 } 2254 2255 TypedValue v = sa.peekValue( 2256 com.android.internal.R.styleable.Extra_value); 2257 if (v != null) { 2258 if (v.type == TypedValue.TYPE_STRING) { 2259 CharSequence cs = v.coerceToString(); 2260 outBundle.putCharSequence(name, cs); 2261 } else if (v.type == TypedValue.TYPE_INT_BOOLEAN) { 2262 outBundle.putBoolean(name, v.data != 0); 2263 } else if (v.type >= TypedValue.TYPE_FIRST_INT 2264 && v.type <= TypedValue.TYPE_LAST_INT) { 2265 outBundle.putInt(name, v.data); 2266 } else if (v.type == TypedValue.TYPE_FLOAT) { 2267 outBundle.putFloat(name, v.getFloat()); 2268 } else { 2269 sa.recycle(); 2270 throw new XmlPullParserException("<" + tagName 2271 + "> only supports string, integer, float, color, and boolean at " 2272 + attrs.getPositionDescription()); 2273 } 2274 } else { 2275 sa.recycle(); 2276 throw new XmlPullParserException("<" + tagName 2277 + "> requires an android:value or android:resource attribute at " 2278 + attrs.getPositionDescription()); 2279 } 2280 2281 sa.recycle(); 2282 } 2283 2284 /** 2285 * Retrieve underlying AssetManager storage for these resources. 2286 */ 2287 public final AssetManager getAssets() { 2288 return mAssets; 2289 } 2290 2291 /** 2292 * Call this to remove all cached loaded layout resources from the 2293 * Resources object. Only intended for use with performance testing 2294 * tools. 2295 */ 2296 public final void flushLayoutCache() { 2297 synchronized (mCachedXmlBlockIds) { 2298 // First see if this block is in our cache. 2299 final int num = mCachedXmlBlockIds.length; 2300 for (int i=0; i<num; i++) { 2301 mCachedXmlBlockIds[i] = -0; 2302 XmlBlock oldBlock = mCachedXmlBlocks[i]; 2303 if (oldBlock != null) { 2304 oldBlock.close(); 2305 } 2306 mCachedXmlBlocks[i] = null; 2307 } 2308 } 2309 } 2310 2311 /** 2312 * Start preloading of resource data using this Resources object. Only 2313 * for use by the zygote process for loading common system resources. 2314 * {@hide} 2315 */ 2316 public final void startPreloading() { 2317 synchronized (sSync) { 2318 if (sPreloaded) { 2319 throw new IllegalStateException("Resources already preloaded"); 2320 } 2321 sPreloaded = true; 2322 mPreloading = true; 2323 sPreloadedDensity = DisplayMetrics.DENSITY_DEVICE; 2324 mConfiguration.densityDpi = sPreloadedDensity; 2325 updateConfiguration(null, null); 2326 } 2327 } 2328 2329 /** 2330 * Called by zygote when it is done preloading resources, to change back 2331 * to normal Resources operation. 2332 */ 2333 public final void finishPreloading() { 2334 if (mPreloading) { 2335 mPreloading = false; 2336 flushLayoutCache(); 2337 } 2338 } 2339 2340 /** 2341 * @hide 2342 */ 2343 public LongSparseArray<ConstantState> getPreloadedDrawables() { 2344 return sPreloadedDrawables[0]; 2345 } 2346 2347 private boolean verifyPreloadConfig(int changingConfigurations, int allowVarying, 2348 int resourceId, String name) { 2349 // We allow preloading of resources even if they vary by font scale (which 2350 // doesn't impact resource selection) or density (which we handle specially by 2351 // simply turning off all preloading), as well as any other configs specified 2352 // by the caller. 2353 if (((changingConfigurations&~(ActivityInfo.CONFIG_FONT_SCALE | 2354 ActivityInfo.CONFIG_DENSITY)) & ~allowVarying) != 0) { 2355 String resName; 2356 try { 2357 resName = getResourceName(resourceId); 2358 } catch (NotFoundException e) { 2359 resName = "?"; 2360 } 2361 // This should never happen in production, so we should log a 2362 // warning even if we're not debugging. 2363 Log.w(TAG, "Preloaded " + name + " resource #0x" 2364 + Integer.toHexString(resourceId) 2365 + " (" + resName + ") that varies with configuration!!"); 2366 return false; 2367 } 2368 if (TRACE_FOR_PRELOAD) { 2369 String resName; 2370 try { 2371 resName = getResourceName(resourceId); 2372 } catch (NotFoundException e) { 2373 resName = "?"; 2374 } 2375 Log.w(TAG, "Preloading " + name + " resource #0x" 2376 + Integer.toHexString(resourceId) 2377 + " (" + resName + ")"); 2378 } 2379 return true; 2380 } 2381 2382 /*package*/ Drawable loadDrawable(TypedValue value, int id, Theme theme) throws NotFoundException { 2383 if (TRACE_FOR_PRELOAD) { 2384 // Log only framework resources 2385 if ((id >>> 24) == 0x1) { 2386 final String name = getResourceName(id); 2387 if (name != null) { 2388 Log.d("PreloadDrawable", name); 2389 } 2390 } 2391 } 2392 2393 final boolean isColorDrawable; 2394 final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches; 2395 final long key; 2396 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT 2397 && value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2398 isColorDrawable = true; 2399 caches = mColorDrawableCache; 2400 key = value.data; 2401 } else { 2402 isColorDrawable = false; 2403 caches = mDrawableCache; 2404 key = (((long) value.assetCookie) << 32) | value.data; 2405 } 2406 2407 // First, check whether we have a cached version of this drawable 2408 // that was inflated against the specified theme. 2409 if (!mPreloading) { 2410 final Drawable cachedDrawable = getCachedDrawable(caches, key, theme); 2411 if (cachedDrawable != null) { 2412 return cachedDrawable; 2413 } 2414 } 2415 2416 // Next, check preloaded drawables. These are unthemed but may have 2417 // themeable attributes. 2418 final ConstantState cs; 2419 if (isColorDrawable) { 2420 cs = sPreloadedColorDrawables.get(key); 2421 } else { 2422 cs = sPreloadedDrawables[mConfiguration.getLayoutDirection()].get(key); 2423 } 2424 2425 final Drawable dr; 2426 if (cs != null) { 2427 final Drawable clonedDr = cs.newDrawable(this); 2428 if (theme != null) { 2429 dr = clonedDr.mutate(); 2430 dr.applyTheme(theme); 2431 dr.clearMutated(); 2432 } else { 2433 dr = clonedDr; 2434 } 2435 } else if (isColorDrawable) { 2436 dr = new ColorDrawable(value.data); 2437 } else { 2438 dr = loadDrawableForCookie(value, id, theme); 2439 } 2440 2441 // If we were able to obtain a drawable, store it in the appropriate 2442 // cache (either preload or themed). 2443 if (dr != null) { 2444 dr.setChangingConfigurations(value.changingConfigurations); 2445 cacheDrawable(value, theme, isColorDrawable, caches, key, dr); 2446 } 2447 2448 return dr; 2449 } 2450 2451 private void cacheDrawable(TypedValue value, Theme theme, boolean isColorDrawable, 2452 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 2453 long key, Drawable dr) { 2454 final ConstantState cs = dr.getConstantState(); 2455 if (cs == null) { 2456 return; 2457 } 2458 2459 if (mPreloading) { 2460 // Preloaded drawables never have a theme, but may be themeable. 2461 final int changingConfigs = cs.getChangingConfigurations(); 2462 if (isColorDrawable) { 2463 if (verifyPreloadConfig(changingConfigs, 0, value.resourceId, "drawable")) { 2464 sPreloadedColorDrawables.put(key, cs); 2465 } 2466 } else { 2467 if (verifyPreloadConfig( 2468 changingConfigs, LAYOUT_DIR_CONFIG, value.resourceId, "drawable")) { 2469 if ((changingConfigs & LAYOUT_DIR_CONFIG) == 0) { 2470 // If this resource does not vary based on layout direction, 2471 // we can put it in all of the preload maps. 2472 sPreloadedDrawables[0].put(key, cs); 2473 sPreloadedDrawables[1].put(key, cs); 2474 } else { 2475 // Otherwise, only in the layout dir we loaded it for. 2476 sPreloadedDrawables[mConfiguration.getLayoutDirection()].put(key, cs); 2477 } 2478 } 2479 } 2480 } else { 2481 synchronized (mAccessLock) { 2482 final String themeKey = theme == null ? "" : theme.mKey; 2483 LongSparseArray<WeakReference<ConstantState>> themedCache = caches.get(themeKey); 2484 if (themedCache == null) { 2485 // Clean out the caches before we add more. This shouldn't 2486 // happen very often. 2487 pruneCaches(caches); 2488 themedCache = new LongSparseArray<WeakReference<ConstantState>>(1); 2489 caches.put(themeKey, themedCache); 2490 } 2491 themedCache.put(key, new WeakReference<ConstantState>(cs)); 2492 } 2493 } 2494 } 2495 2496 /** 2497 * Prunes empty caches from the cache map. 2498 * 2499 * @param caches The map of caches to prune. 2500 */ 2501 private void pruneCaches(ArrayMap<String, 2502 LongSparseArray<WeakReference<ConstantState>>> caches) { 2503 final int N = caches.size(); 2504 for (int i = N - 1; i >= 0; i--) { 2505 final LongSparseArray<WeakReference<ConstantState>> cache = caches.valueAt(i); 2506 if (pruneCache(cache)) { 2507 caches.removeAt(i); 2508 } 2509 } 2510 } 2511 2512 /** 2513 * Prunes obsolete weak references from a cache, returning {@code true} if 2514 * the cache is empty and should be removed. 2515 * 2516 * @param cache The cache of weak references to prune. 2517 * @return {@code true} if the cache is empty and should be removed. 2518 */ 2519 private boolean pruneCache(LongSparseArray<WeakReference<ConstantState>> cache) { 2520 final int N = cache.size(); 2521 for (int i = N - 1; i >= 0; i--) { 2522 final WeakReference entry = cache.valueAt(i); 2523 if (entry == null || entry.get() == null) { 2524 cache.removeAt(i); 2525 } 2526 } 2527 return cache.size() == 0; 2528 } 2529 2530 /** 2531 * Loads a drawable from XML or resources stream. 2532 */ 2533 private Drawable loadDrawableForCookie(TypedValue value, int id, Theme theme) { 2534 if (value.string == null) { 2535 throw new NotFoundException("Resource \"" + getResourceName(id) + "\" (" 2536 + Integer.toHexString(id) + ") is not a Drawable (color or path): " + value); 2537 } 2538 2539 final String file = value.string.toString(); 2540 2541 if (TRACE_FOR_MISS_PRELOAD) { 2542 // Log only framework resources 2543 if ((id >>> 24) == 0x1) { 2544 final String name = getResourceName(id); 2545 if (name != null) { 2546 Log.d(TAG, "Loading framework drawable #" + Integer.toHexString(id) 2547 + ": " + name + " at " + file); 2548 } 2549 } 2550 } 2551 2552 if (DEBUG_LOAD) { 2553 Log.v(TAG, "Loading drawable for cookie " + value.assetCookie + ": " + file); 2554 } 2555 2556 final Drawable dr; 2557 2558 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2559 try { 2560 if (file.endsWith(".xml")) { 2561 final XmlResourceParser rp = loadXmlResourceParser( 2562 file, id, value.assetCookie, "drawable"); 2563 dr = Drawable.createFromXml(this, rp, theme); 2564 rp.close(); 2565 } else { 2566 final InputStream is = mAssets.openNonAsset( 2567 value.assetCookie, file, AssetManager.ACCESS_STREAMING); 2568 dr = Drawable.createFromResourceStream(this, value, is, file, null); 2569 is.close(); 2570 } 2571 } catch (Exception e) { 2572 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2573 final NotFoundException rnf = new NotFoundException( 2574 "File " + file + " from drawable resource ID #0x" + Integer.toHexString(id)); 2575 rnf.initCause(e); 2576 throw rnf; 2577 } 2578 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2579 2580 return dr; 2581 } 2582 2583 private Drawable getCachedDrawable( 2584 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 2585 long key, Theme theme) { 2586 synchronized (mAccessLock) { 2587 final String themeKey = theme != null ? theme.mKey : ""; 2588 final LongSparseArray<WeakReference<ConstantState>> themedCache = caches.get(themeKey); 2589 if (themedCache != null) { 2590 final Drawable themedDrawable = getCachedDrawableLocked(themedCache, key); 2591 if (themedDrawable != null) { 2592 return themedDrawable; 2593 } 2594 } 2595 2596 // No cached drawable, we'll need to create a new one. 2597 return null; 2598 } 2599 } 2600 2601 private ConstantState getConstantStateLocked( 2602 LongSparseArray<WeakReference<ConstantState>> drawableCache, long key) { 2603 final WeakReference<ConstantState> wr = drawableCache.get(key); 2604 if (wr != null) { // we have the key 2605 final ConstantState entry = wr.get(); 2606 if (entry != null) { 2607 //Log.i(TAG, "Returning cached drawable @ #" + 2608 // Integer.toHexString(((Integer)key).intValue()) 2609 // + " in " + this + ": " + entry); 2610 return entry; 2611 } else { // our entry has been purged 2612 drawableCache.delete(key); 2613 } 2614 } 2615 return null; 2616 } 2617 2618 private Drawable getCachedDrawableLocked( 2619 LongSparseArray<WeakReference<ConstantState>> drawableCache, long key) { 2620 final ConstantState entry = getConstantStateLocked(drawableCache, key); 2621 if (entry != null) { 2622 return entry.newDrawable(this); 2623 } 2624 return null; 2625 } 2626 2627 @Nullable 2628 ColorStateList loadColorStateList(TypedValue value, int id, Theme theme) 2629 throws NotFoundException { 2630 if (TRACE_FOR_PRELOAD) { 2631 // Log only framework resources 2632 if ((id >>> 24) == 0x1) { 2633 final String name = getResourceName(id); 2634 if (name != null) android.util.Log.d("PreloadColorStateList", name); 2635 } 2636 } 2637 2638 final long key = (((long) value.assetCookie) << 32) | value.data; 2639 2640 ColorStateList csl; 2641 2642 // Handle inline color definitions. 2643 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT 2644 && value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2645 final ColorStateListFactory factory = sPreloadedColorStateLists.get(key); 2646 if (factory != null) { 2647 return factory.newInstance(); 2648 } 2649 2650 csl = ColorStateList.valueOf(value.data); 2651 2652 if (mPreloading) { 2653 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2654 "color")) { 2655 sPreloadedColorStateLists.put(key, csl.getFactory()); 2656 } 2657 } 2658 2659 return csl; 2660 } 2661 2662 final ConfigurationBoundResourceCache<ColorStateList> cache = mColorStateListCache; 2663 2664 csl = cache.get(key, theme); 2665 if (csl != null) { 2666 return csl; 2667 } 2668 2669 final ColorStateListFactory factory = sPreloadedColorStateLists.get(key); 2670 if (factory != null) { 2671 csl = factory.newInstance(this, theme); 2672 } 2673 2674 if (csl == null) { 2675 csl = loadColorStateListForCookie(value, id, theme); 2676 } 2677 2678 if (csl != null) { 2679 if (mPreloading) { 2680 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2681 "color")) { 2682 sPreloadedColorStateLists.put(key, csl.getFactory()); 2683 } 2684 } else { 2685 cache.put(key, theme, csl.getFactory()); 2686 } 2687 } 2688 2689 return csl; 2690 } 2691 2692 private ColorStateList loadColorStateListForCookie(TypedValue value, int id, Theme theme) { 2693 if (value.string == null) { 2694 throw new UnsupportedOperationException( 2695 "Can't convert to color state list: type=0x" + value.type); 2696 } 2697 2698 final String file = value.string.toString(); 2699 2700 if (TRACE_FOR_MISS_PRELOAD) { 2701 // Log only framework resources 2702 if ((id >>> 24) == 0x1) { 2703 final String name = getResourceName(id); 2704 if (name != null) { 2705 Log.d(TAG, "Loading framework color state list #" + Integer.toHexString(id) 2706 + ": " + name + " at " + file); 2707 } 2708 } 2709 } 2710 2711 if (DEBUG_LOAD) { 2712 Log.v(TAG, "Loading color state list for cookie " + value.assetCookie + ": " + file); 2713 } 2714 2715 final ColorStateList csl; 2716 2717 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2718 if (file.endsWith(".xml")) { 2719 try { 2720 final XmlResourceParser rp = loadXmlResourceParser( 2721 file, id, value.assetCookie, "colorstatelist"); 2722 csl = ColorStateList.createFromXml(this, rp, theme); 2723 rp.close(); 2724 } catch (Exception e) { 2725 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2726 final NotFoundException rnf = new NotFoundException( 2727 "File " + file + " from color state list resource ID #0x" 2728 + Integer.toHexString(id)); 2729 rnf.initCause(e); 2730 throw rnf; 2731 } 2732 } else { 2733 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2734 throw new NotFoundException( 2735 "File " + file + " from drawable resource ID #0x" 2736 + Integer.toHexString(id) + ": .xml extension required"); 2737 } 2738 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2739 2740 return csl; 2741 } 2742 2743 /*package*/ XmlResourceParser loadXmlResourceParser(int id, String type) 2744 throws NotFoundException { 2745 synchronized (mAccessLock) { 2746 TypedValue value = mTmpValue; 2747 if (value == null) { 2748 mTmpValue = value = new TypedValue(); 2749 } 2750 getValue(id, value, true); 2751 if (value.type == TypedValue.TYPE_STRING) { 2752 return loadXmlResourceParser(value.string.toString(), id, 2753 value.assetCookie, type); 2754 } 2755 throw new NotFoundException( 2756 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 2757 + Integer.toHexString(value.type) + " is not valid"); 2758 } 2759 } 2760 2761 /*package*/ XmlResourceParser loadXmlResourceParser(String file, int id, 2762 int assetCookie, String type) throws NotFoundException { 2763 if (id != 0) { 2764 try { 2765 // These may be compiled... 2766 synchronized (mCachedXmlBlockIds) { 2767 // First see if this block is in our cache. 2768 final int num = mCachedXmlBlockIds.length; 2769 for (int i=0; i<num; i++) { 2770 if (mCachedXmlBlockIds[i] == id) { 2771 //System.out.println("**** REUSING XML BLOCK! id=" 2772 // + id + ", index=" + i); 2773 return mCachedXmlBlocks[i].newParser(); 2774 } 2775 } 2776 2777 // Not in the cache, create a new block and put it at 2778 // the next slot in the cache. 2779 XmlBlock block = mAssets.openXmlBlockAsset( 2780 assetCookie, file); 2781 if (block != null) { 2782 int pos = mLastCachedXmlBlockIndex+1; 2783 if (pos >= num) pos = 0; 2784 mLastCachedXmlBlockIndex = pos; 2785 XmlBlock oldBlock = mCachedXmlBlocks[pos]; 2786 if (oldBlock != null) { 2787 oldBlock.close(); 2788 } 2789 mCachedXmlBlockIds[pos] = id; 2790 mCachedXmlBlocks[pos] = block; 2791 //System.out.println("**** CACHING NEW XML BLOCK! id=" 2792 // + id + ", index=" + pos); 2793 return block.newParser(); 2794 } 2795 } 2796 } catch (Exception e) { 2797 NotFoundException rnf = new NotFoundException( 2798 "File " + file + " from xml type " + type + " resource ID #0x" 2799 + Integer.toHexString(id)); 2800 rnf.initCause(e); 2801 throw rnf; 2802 } 2803 } 2804 2805 throw new NotFoundException( 2806 "File " + file + " from xml type " + type + " resource ID #0x" 2807 + Integer.toHexString(id)); 2808 } 2809 2810 /*package*/ void recycleCachedStyledAttributes(TypedArray attrs) { 2811 synchronized (mAccessLock) { 2812 final TypedArray cached = mCachedStyledAttributes; 2813 if (cached == null || cached.mData.length < attrs.mData.length) { 2814 mCachedStyledAttributes = attrs; 2815 } 2816 } 2817 } 2818 2819 /** 2820 * Obtains styled attributes from the theme, if available, or unstyled 2821 * resources if the theme is null. 2822 * 2823 * @hide 2824 */ 2825 public static TypedArray obtainAttributes( 2826 Resources res, Theme theme, AttributeSet set, int[] attrs) { 2827 if (theme == null) { 2828 return res.obtainAttributes(set, attrs); 2829 } 2830 return theme.obtainStyledAttributes(set, attrs, 0, 0); 2831 } 2832 2833 private Resources() { 2834 mAssets = AssetManager.getSystem(); 2835 // NOTE: Intentionally leaving this uninitialized (all values set 2836 // to zero), so that anyone who tries to do something that requires 2837 // metrics will get a very wrong value. 2838 mConfiguration.setToDefaults(); 2839 mMetrics.setToDefaults(); 2840 updateConfiguration(null, null); 2841 mAssets.ensureStringBlocks(); 2842 } 2843} 2844