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