Resources.java revision f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccda
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.content.pm.ActivityInfo; 25import android.graphics.Movie; 26import android.graphics.drawable.Drawable; 27import android.graphics.drawable.ColorDrawable; 28import android.graphics.drawable.Drawable.ConstantState; 29import android.os.Build; 30import android.os.Bundle; 31import android.os.Trace; 32import android.util.AttributeSet; 33import android.util.DisplayMetrics; 34import android.util.Log; 35import android.util.Slog; 36import android.util.TypedValue; 37import android.util.LongSparseArray; 38 39import java.io.IOException; 40import java.io.InputStream; 41import java.lang.ref.WeakReference; 42import java.util.Locale; 43 44import libcore.icu.NativePluralRules; 45 46/** 47 * Class for accessing an application's resources. This sits on top of the 48 * asset manager of the application (accessible through {@link #getAssets}) and 49 * provides a high-level API for getting typed data from the assets. 50 * 51 * <p>The Android resource system keeps track of all non-code assets associated with an 52 * application. You can use this class to access your application's resources. You can generally 53 * acquire the {@link android.content.res.Resources} instance associated with your application 54 * with {@link android.content.Context#getResources getResources()}.</p> 55 * 56 * <p>The Android SDK tools compile your application's resources into the application binary 57 * at build time. To use a resource, you must install it correctly in the source tree (inside 58 * your project's {@code res/} directory) and build your application. As part of the build 59 * process, the SDK tools generate symbols for each resource, which you can use in your application 60 * code to access the resources.</p> 61 * 62 * <p>Using application resources makes it easy to update various characteristics of your 63 * application without modifying code, and—by providing sets of alternative 64 * resources—enables you to optimize your application for a variety of device configurations 65 * (such as for different languages and screen sizes). This is an important aspect of developing 66 * Android applications that are compatible on different types of devices.</p> 67 * 68 * <p>For more information about using resources, see the documentation about <a 69 * href="{@docRoot}guide/topics/resources/index.html">Application Resources</a>.</p> 70 */ 71public class Resources { 72 static final String TAG = "Resources"; 73 private static final boolean DEBUG_LOAD = false; 74 private static final boolean DEBUG_CONFIG = false; 75 private static final boolean DEBUG_ATTRIBUTES_CACHE = false; 76 private static final boolean TRACE_FOR_PRELOAD = false; 77 private static final boolean TRACE_FOR_MISS_PRELOAD = false; 78 79 private static final int ID_OTHER = 0x01000004; 80 81 private static final Object sSync = new Object(); 82 /*package*/ static Resources mSystem = null; 83 84 // Information about preloaded resources. Note that they are not 85 // protected by a lock, because while preloading in zygote we are all 86 // single-threaded, and after that these are immutable. 87 private static final LongSparseArray<Drawable.ConstantState>[] sPreloadedDrawables; 88 private static final LongSparseArray<Drawable.ConstantState> sPreloadedColorDrawables 89 = new LongSparseArray<Drawable.ConstantState>(); 90 private static final LongSparseArray<ColorStateList> sPreloadedColorStateLists 91 = new LongSparseArray<ColorStateList>(); 92 93 private static boolean sPreloaded; 94 private static int sPreloadedDensity; 95 96 // These are protected by mAccessLock. 97 98 /*package*/ final Object mAccessLock = new Object(); 99 /*package*/ final Configuration mTmpConfig = new Configuration(); 100 /*package*/ TypedValue mTmpValue = new TypedValue(); 101 /*package*/ final LongSparseArray<WeakReference<Drawable.ConstantState> > mDrawableCache 102 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(0); 103 /*package*/ final LongSparseArray<WeakReference<ColorStateList> > mColorStateListCache 104 = new LongSparseArray<WeakReference<ColorStateList> >(0); 105 /*package*/ final LongSparseArray<WeakReference<Drawable.ConstantState> > mColorDrawableCache 106 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(0); 107 /*package*/ boolean mPreloading; 108 109 /*package*/ TypedArray mCachedStyledAttributes = null; 110 RuntimeException mLastRetrievedAttrs = null; 111 112 private int mLastCachedXmlBlockIndex = -1; 113 private final int[] mCachedXmlBlockIds = { 0, 0, 0, 0 }; 114 private final XmlBlock[] mCachedXmlBlocks = new XmlBlock[4]; 115 116 /*package*/ final AssetManager mAssets; 117 private final Configuration mConfiguration = new Configuration(); 118 /*package*/ final DisplayMetrics mMetrics = new DisplayMetrics(); 119 private NativePluralRules mPluralRule; 120 121 private CompatibilityInfo mCompatibilityInfo; 122 123 static { 124 sPreloadedDrawables = new LongSparseArray[2]; 125 sPreloadedDrawables[0] = new LongSparseArray<Drawable.ConstantState>(); 126 sPreloadedDrawables[1] = new LongSparseArray<Drawable.ConstantState>(); 127 } 128 129 /** @hide */ 130 public static int selectDefaultTheme(int curTheme, int targetSdkVersion) { 131 return selectSystemTheme(curTheme, targetSdkVersion, 132 com.android.internal.R.style.Theme, 133 com.android.internal.R.style.Theme_Holo, 134 com.android.internal.R.style.Theme_DeviceDefault); 135 } 136 137 /** @hide */ 138 public static int selectSystemTheme(int curTheme, int targetSdkVersion, 139 int orig, int holo, int deviceDefault) { 140 if (curTheme != 0) { 141 return curTheme; 142 } 143 if (targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) { 144 return orig; 145 } 146 if (targetSdkVersion < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 147 return holo; 148 } 149 return deviceDefault; 150 } 151 152 /** 153 * This exception is thrown by the resource APIs when a requested resource 154 * can not be found. 155 */ 156 public static class NotFoundException extends RuntimeException { 157 public NotFoundException() { 158 } 159 160 public NotFoundException(String name) { 161 super(name); 162 } 163 } 164 165 /** 166 * Create a new Resources object on top of an existing set of assets in an 167 * AssetManager. 168 * 169 * @param assets Previously created AssetManager. 170 * @param metrics Current display metrics to consider when 171 * selecting/computing resource values. 172 * @param config Desired device configuration to consider when 173 * selecting/computing resource values (optional). 174 */ 175 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config) { 176 this(assets, metrics, config, null); 177 } 178 179 /** 180 * Creates a new Resources object with CompatibilityInfo. 181 * 182 * @param assets Previously created AssetManager. 183 * @param metrics Current display metrics to consider when 184 * selecting/computing resource values. 185 * @param config Desired device configuration to consider when 186 * selecting/computing resource values (optional). 187 * @param compInfo this resource's compatibility info. It will use the default compatibility 188 * info when it's null. 189 * @hide 190 */ 191 public Resources(AssetManager assets, DisplayMetrics metrics, 192 Configuration config, CompatibilityInfo compInfo) { 193 mAssets = assets; 194 mMetrics.setToDefaults(); 195 mCompatibilityInfo = compInfo; 196 updateConfiguration(config, metrics); 197 assets.ensureStringBlocks(); 198 } 199 200 /** 201 * Return a global shared Resources object that provides access to only 202 * system resources (no application resources), and is not configured for 203 * the current screen (can not use dimension units, does not change based 204 * on orientation, etc). 205 */ 206 public static Resources getSystem() { 207 synchronized (sSync) { 208 Resources ret = mSystem; 209 if (ret == null) { 210 ret = new Resources(); 211 mSystem = ret; 212 } 213 214 return ret; 215 } 216 } 217 218 /** 219 * Return the string value associated with a particular resource ID. The 220 * returned object will be a String if this is a plain string; it will be 221 * some other type of CharSequence if it is styled. 222 * {@more} 223 * 224 * @param id The desired resource identifier, as generated by the aapt 225 * tool. This integer encodes the package, type, and resource 226 * entry. The value 0 is an invalid identifier. 227 * 228 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 229 * 230 * @return CharSequence The string data associated with the resource, plus 231 * possibly styled text information. 232 */ 233 public CharSequence getText(int id) throws NotFoundException { 234 CharSequence res = mAssets.getResourceText(id); 235 if (res != null) { 236 return res; 237 } 238 throw new NotFoundException("String resource ID #0x" 239 + Integer.toHexString(id)); 240 } 241 242 /** 243 * Returns the character sequence necessary for grammatically correct pluralization 244 * of the given resource ID for the given quantity. 245 * Note that the character sequence is selected based solely on grammatical necessity, 246 * and that such rules differ between languages. Do not assume you know which string 247 * will be returned for a given quantity. See 248 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 249 * for more detail. 250 * 251 * @param id The desired resource identifier, as generated by the aapt 252 * tool. This integer encodes the package, type, and resource 253 * entry. The value 0 is an invalid identifier. 254 * @param quantity The number used to get the correct string for the current language's 255 * plural rules. 256 * 257 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 258 * 259 * @return CharSequence The string data associated with the resource, plus 260 * possibly styled text information. 261 */ 262 public CharSequence getQuantityText(int id, int quantity) throws NotFoundException { 263 NativePluralRules rule = getPluralRule(); 264 CharSequence res = mAssets.getResourceBagText(id, 265 attrForQuantityCode(rule.quantityForInt(quantity))); 266 if (res != null) { 267 return res; 268 } 269 res = mAssets.getResourceBagText(id, ID_OTHER); 270 if (res != null) { 271 return res; 272 } 273 throw new NotFoundException("Plural resource ID #0x" + Integer.toHexString(id) 274 + " quantity=" + quantity 275 + " item=" + stringForQuantityCode(rule.quantityForInt(quantity))); 276 } 277 278 private NativePluralRules getPluralRule() { 279 synchronized (sSync) { 280 if (mPluralRule == null) { 281 mPluralRule = NativePluralRules.forLocale(mConfiguration.locale); 282 } 283 return mPluralRule; 284 } 285 } 286 287 private static int attrForQuantityCode(int quantityCode) { 288 switch (quantityCode) { 289 case NativePluralRules.ZERO: return 0x01000005; 290 case NativePluralRules.ONE: return 0x01000006; 291 case NativePluralRules.TWO: return 0x01000007; 292 case NativePluralRules.FEW: return 0x01000008; 293 case NativePluralRules.MANY: return 0x01000009; 294 default: return ID_OTHER; 295 } 296 } 297 298 private static String stringForQuantityCode(int quantityCode) { 299 switch (quantityCode) { 300 case NativePluralRules.ZERO: return "zero"; 301 case NativePluralRules.ONE: return "one"; 302 case NativePluralRules.TWO: return "two"; 303 case NativePluralRules.FEW: return "few"; 304 case NativePluralRules.MANY: return "many"; 305 default: return "other"; 306 } 307 } 308 309 /** 310 * Return the string value associated with a particular resource ID. It 311 * will be stripped of any styled text information. 312 * {@more} 313 * 314 * @param id The desired resource identifier, as generated by the aapt 315 * tool. This integer encodes the package, type, and resource 316 * entry. The value 0 is an invalid identifier. 317 * 318 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 319 * 320 * @return String The string data associated with the resource, 321 * stripped of styled text information. 322 */ 323 public String getString(int id) throws NotFoundException { 324 CharSequence res = getText(id); 325 if (res != null) { 326 return res.toString(); 327 } 328 throw new NotFoundException("String resource ID #0x" 329 + Integer.toHexString(id)); 330 } 331 332 333 /** 334 * Return the string value associated with a particular resource ID, 335 * substituting the format arguments as defined in {@link java.util.Formatter} 336 * and {@link java.lang.String#format}. It will be stripped of any styled text 337 * information. 338 * {@more} 339 * 340 * @param id The desired resource identifier, as generated by the aapt 341 * tool. This integer encodes the package, type, and resource 342 * entry. The value 0 is an invalid identifier. 343 * 344 * @param formatArgs The format arguments that will be used for substitution. 345 * 346 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 347 * 348 * @return String The string data associated with the resource, 349 * stripped of styled text information. 350 */ 351 public String getString(int id, Object... formatArgs) throws NotFoundException { 352 String raw = getString(id); 353 return String.format(mConfiguration.locale, raw, formatArgs); 354 } 355 356 /** 357 * Formats the string necessary for grammatically correct pluralization 358 * of the given resource ID for the given quantity, using the given arguments. 359 * Note that the string is selected based solely on grammatical necessity, 360 * and that such rules differ between languages. Do not assume you know which string 361 * will be returned for a given quantity. See 362 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 363 * for more detail. 364 * 365 * <p>Substitution of format arguments works as if using 366 * {@link java.util.Formatter} and {@link java.lang.String#format}. 367 * The resulting string will be stripped of any styled text information. 368 * 369 * @param id The desired resource identifier, as generated by the aapt 370 * tool. This integer encodes the package, type, and resource 371 * entry. The value 0 is an invalid identifier. 372 * @param quantity The number used to get the correct string for the current language's 373 * plural rules. 374 * @param formatArgs The format arguments that will be used for substitution. 375 * 376 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 377 * 378 * @return String The string data associated with the resource, 379 * stripped of styled text information. 380 */ 381 public String getQuantityString(int id, int quantity, Object... formatArgs) 382 throws NotFoundException { 383 String raw = getQuantityText(id, quantity).toString(); 384 return String.format(mConfiguration.locale, raw, formatArgs); 385 } 386 387 /** 388 * Returns the string necessary for grammatically correct pluralization 389 * of the given resource ID for the given quantity. 390 * Note that the string is selected based solely on grammatical necessity, 391 * and that such rules differ between languages. Do not assume you know which string 392 * will be returned for a given quantity. See 393 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 394 * for more detail. 395 * 396 * @param id The desired resource identifier, as generated by the aapt 397 * tool. This integer encodes the package, type, and resource 398 * entry. The value 0 is an invalid identifier. 399 * @param quantity The number used to get the correct string for the current language's 400 * plural rules. 401 * 402 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 403 * 404 * @return String The string data associated with the resource, 405 * stripped of styled text information. 406 */ 407 public String getQuantityString(int id, int quantity) throws NotFoundException { 408 return getQuantityText(id, quantity).toString(); 409 } 410 411 /** 412 * Return the string value associated with a particular resource ID. The 413 * returned object will be a String if this is a plain string; it will be 414 * some other type of CharSequence if it is styled. 415 * 416 * @param id The desired resource identifier, as generated by the aapt 417 * tool. This integer encodes the package, type, and resource 418 * entry. The value 0 is an invalid identifier. 419 * 420 * @param def The default CharSequence to return. 421 * 422 * @return CharSequence The string data associated with the resource, plus 423 * possibly styled text information, or def if id is 0 or not found. 424 */ 425 public CharSequence getText(int id, CharSequence def) { 426 CharSequence res = id != 0 ? mAssets.getResourceText(id) : null; 427 return res != null ? res : def; 428 } 429 430 /** 431 * Return the styled text array associated with a particular resource ID. 432 * 433 * @param id The desired resource identifier, as generated by the aapt 434 * tool. This integer encodes the package, type, and resource 435 * entry. The value 0 is an invalid identifier. 436 * 437 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 438 * 439 * @return The styled text array associated with the resource. 440 */ 441 public CharSequence[] getTextArray(int id) throws NotFoundException { 442 CharSequence[] res = mAssets.getResourceTextArray(id); 443 if (res != null) { 444 return res; 445 } 446 throw new NotFoundException("Text array resource ID #0x" 447 + Integer.toHexString(id)); 448 } 449 450 /** 451 * Return the string array associated with a particular resource ID. 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 * 457 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 458 * 459 * @return The string array associated with the resource. 460 */ 461 public String[] getStringArray(int id) throws NotFoundException { 462 String[] res = mAssets.getResourceStringArray(id); 463 if (res != null) { 464 return res; 465 } 466 throw new NotFoundException("String array resource ID #0x" 467 + Integer.toHexString(id)); 468 } 469 470 /** 471 * Return the int array associated with a particular resource ID. 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 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 478 * 479 * @return The int array associated with the resource. 480 */ 481 public int[] getIntArray(int id) throws NotFoundException { 482 int[] res = mAssets.getArrayIntResource(id); 483 if (res != null) { 484 return res; 485 } 486 throw new NotFoundException("Int array resource ID #0x" 487 + Integer.toHexString(id)); 488 } 489 490 /** 491 * Return an array of heterogeneous values. 492 * 493 * @param id The desired resource identifier, as generated by the aapt 494 * tool. This integer encodes the package, type, and resource 495 * entry. The value 0 is an invalid identifier. 496 * 497 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 498 * 499 * @return Returns a TypedArray holding an array of the array values. 500 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 501 * when done with it. 502 */ 503 public TypedArray obtainTypedArray(int id) throws NotFoundException { 504 int len = mAssets.getArraySize(id); 505 if (len < 0) { 506 throw new NotFoundException("Array resource ID #0x" 507 + Integer.toHexString(id)); 508 } 509 510 TypedArray array = getCachedStyledAttributes(len); 511 array.mLength = mAssets.retrieveArray(id, array.mData); 512 array.mIndices[0] = 0; 513 514 return array; 515 } 516 517 /** 518 * Retrieve a dimensional for a particular resource ID. Unit 519 * conversions are based on the current {@link DisplayMetrics} associated 520 * with the resources. 521 * 522 * @param id The desired resource identifier, as generated by the aapt 523 * tool. This integer encodes the package, type, and resource 524 * entry. The value 0 is an invalid identifier. 525 * 526 * @return Resource dimension value multiplied by the appropriate 527 * metric. 528 * 529 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 530 * 531 * @see #getDimensionPixelOffset 532 * @see #getDimensionPixelSize 533 */ 534 public float getDimension(int id) throws NotFoundException { 535 synchronized (mAccessLock) { 536 TypedValue value = mTmpValue; 537 if (value == null) { 538 mTmpValue = value = new TypedValue(); 539 } 540 getValue(id, value, true); 541 if (value.type == TypedValue.TYPE_DIMENSION) { 542 return TypedValue.complexToDimension(value.data, mMetrics); 543 } 544 throw new NotFoundException( 545 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 546 + Integer.toHexString(value.type) + " is not valid"); 547 } 548 } 549 550 /** 551 * Retrieve a dimensional for a particular resource ID for use 552 * as an offset in raw pixels. This is the same as 553 * {@link #getDimension}, except the returned value is converted to 554 * integer pixels for you. An offset conversion involves simply 555 * truncating the base value to an integer. 556 * 557 * @param id The desired resource identifier, as generated by the aapt 558 * tool. This integer encodes the package, type, and resource 559 * entry. The value 0 is an invalid identifier. 560 * 561 * @return Resource dimension value multiplied by the appropriate 562 * metric and truncated to integer pixels. 563 * 564 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 565 * 566 * @see #getDimension 567 * @see #getDimensionPixelSize 568 */ 569 public int getDimensionPixelOffset(int id) throws NotFoundException { 570 synchronized (mAccessLock) { 571 TypedValue value = mTmpValue; 572 if (value == null) { 573 mTmpValue = value = new TypedValue(); 574 } 575 getValue(id, value, true); 576 if (value.type == TypedValue.TYPE_DIMENSION) { 577 return TypedValue.complexToDimensionPixelOffset( 578 value.data, mMetrics); 579 } 580 throw new NotFoundException( 581 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 582 + Integer.toHexString(value.type) + " is not valid"); 583 } 584 } 585 586 /** 587 * Retrieve a dimensional for a particular resource ID for use 588 * as a size in raw pixels. This is the same as 589 * {@link #getDimension}, except the returned value is converted to 590 * integer pixels for use as a size. A size conversion involves 591 * rounding the base value, and ensuring that a non-zero base value 592 * is at least one pixel in size. 593 * 594 * @param id The desired resource identifier, as generated by the aapt 595 * tool. This integer encodes the package, type, and resource 596 * entry. The value 0 is an invalid identifier. 597 * 598 * @return Resource dimension value multiplied by the appropriate 599 * metric and truncated to integer pixels. 600 * 601 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 602 * 603 * @see #getDimension 604 * @see #getDimensionPixelOffset 605 */ 606 public int getDimensionPixelSize(int id) throws NotFoundException { 607 synchronized (mAccessLock) { 608 TypedValue value = mTmpValue; 609 if (value == null) { 610 mTmpValue = value = new TypedValue(); 611 } 612 getValue(id, value, true); 613 if (value.type == TypedValue.TYPE_DIMENSION) { 614 return TypedValue.complexToDimensionPixelSize( 615 value.data, mMetrics); 616 } 617 throw new NotFoundException( 618 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 619 + Integer.toHexString(value.type) + " is not valid"); 620 } 621 } 622 623 /** 624 * Retrieve a fractional unit for a particular resource ID. 625 * 626 * @param id The desired resource identifier, as generated by the aapt 627 * tool. This integer encodes the package, type, and resource 628 * entry. The value 0 is an invalid identifier. 629 * @param base The base value of this fraction. In other words, a 630 * standard fraction is multiplied by this value. 631 * @param pbase The parent base value of this fraction. In other 632 * words, a parent fraction (nn%p) is multiplied by this 633 * value. 634 * 635 * @return Attribute fractional value multiplied by the appropriate 636 * base value. 637 * 638 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 639 */ 640 public float getFraction(int id, int base, int pbase) { 641 synchronized (mAccessLock) { 642 TypedValue value = mTmpValue; 643 if (value == null) { 644 mTmpValue = value = new TypedValue(); 645 } 646 getValue(id, value, true); 647 if (value.type == TypedValue.TYPE_FRACTION) { 648 return TypedValue.complexToFraction(value.data, base, pbase); 649 } 650 throw new NotFoundException( 651 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 652 + Integer.toHexString(value.type) + " is not valid"); 653 } 654 } 655 656 /** 657 * Return a drawable object associated with a particular resource ID. 658 * Various types of objects will be returned depending on the underlying 659 * resource -- for example, a solid color, PNG image, scalable image, etc. 660 * The Drawable API hides these implementation details. 661 * 662 * <p class="note"><strong>Note:</strong> Prior to 663 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, this function 664 * would not correctly retrieve the final configuration density when 665 * the resource ID passed here is an alias to another Drawable resource. 666 * This means that if the density configuration of the alias resource 667 * is different than the actual resource, the density of the returned 668 * Drawable would be incorrect, resulting in bad scaling. To work 669 * around this, you can instead retrieve the Drawable through 670 * {@link TypedArray#getDrawable TypedArray.getDrawable}. Use 671 * {@link android.content.Context#obtainStyledAttributes(int[]) 672 * Context.obtainStyledAttributes} with 673 * an array containing the resource ID of interest to create the TypedArray.</p> 674 * 675 * @param id The desired resource identifier, as generated by the aapt 676 * tool. This integer encodes the package, type, and resource 677 * entry. The value 0 is an invalid identifier. 678 * 679 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 680 * 681 * @return Drawable An object that can be used to draw this resource. 682 */ 683 public Drawable getDrawable(int id) throws NotFoundException { 684 TypedValue value; 685 synchronized (mAccessLock) { 686 value = mTmpValue; 687 if (value == null) { 688 value = new TypedValue(); 689 } else { 690 mTmpValue = null; 691 } 692 getValue(id, value, true); 693 } 694 Drawable res = loadDrawable(value, id); 695 synchronized (mAccessLock) { 696 if (mTmpValue == null) { 697 mTmpValue = value; 698 } 699 } 700 return res; 701 } 702 703 /** 704 * Return a drawable object associated with a particular resource ID for the 705 * given screen density in DPI. This will set the drawable's density to be 706 * the device's density multiplied by the ratio of actual drawable density 707 * to requested density. This allows the drawable to be scaled up to the 708 * correct size if needed. Various types of objects will be returned 709 * depending on the underlying resource -- for example, a solid color, PNG 710 * image, scalable image, etc. The Drawable API hides these implementation 711 * details. 712 * 713 * @param id The desired resource identifier, as generated by the aapt tool. 714 * This integer encodes the package, type, and resource entry. 715 * The value 0 is an invalid identifier. 716 * @param density the desired screen density indicated by the resource as 717 * found in {@link DisplayMetrics}. 718 * @throws NotFoundException Throws NotFoundException if the given ID does 719 * not exist. 720 * @return Drawable An object that can be used to draw this resource. 721 */ 722 public Drawable getDrawableForDensity(int id, int density) throws NotFoundException { 723 TypedValue value; 724 synchronized (mAccessLock) { 725 value = mTmpValue; 726 if (value == null) { 727 value = new TypedValue(); 728 } else { 729 mTmpValue = null; 730 } 731 getValueForDensity(id, density, value, true); 732 733 /* 734 * Pretend the requested density is actually the display density. If 735 * the drawable returned is not the requested density, then force it 736 * to be scaled later by dividing its density by the ratio of 737 * requested density to actual device density. Drawables that have 738 * undefined density or no density don't need to be handled here. 739 */ 740 if (value.density > 0 && value.density != TypedValue.DENSITY_NONE) { 741 if (value.density == density) { 742 value.density = mMetrics.densityDpi; 743 } else { 744 value.density = (value.density * mMetrics.densityDpi) / density; 745 } 746 } 747 } 748 749 Drawable res = loadDrawable(value, id); 750 synchronized (mAccessLock) { 751 if (mTmpValue == null) { 752 mTmpValue = value; 753 } 754 } 755 return res; 756 } 757 758 /** 759 * Return a movie object associated with the particular resource ID. 760 * @param id The desired resource identifier, as generated by the aapt 761 * tool. This integer encodes the package, type, and resource 762 * entry. The value 0 is an invalid identifier. 763 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 764 * 765 */ 766 public Movie getMovie(int id) throws NotFoundException { 767 InputStream is = openRawResource(id); 768 Movie movie = Movie.decodeStream(is); 769 try { 770 is.close(); 771 } 772 catch (java.io.IOException e) { 773 // don't care, since the return value is valid 774 } 775 return movie; 776 } 777 778 /** 779 * Return a color integer associated with a particular resource ID. 780 * If the resource holds a complex 781 * {@link android.content.res.ColorStateList}, then the default color from 782 * the set is returned. 783 * 784 * @param id The desired resource identifier, as generated by the aapt 785 * tool. This integer encodes the package, type, and resource 786 * entry. The value 0 is an invalid identifier. 787 * 788 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 789 * 790 * @return Returns a single color value in the form 0xAARRGGBB. 791 */ 792 public int getColor(int id) throws NotFoundException { 793 TypedValue value; 794 synchronized (mAccessLock) { 795 value = mTmpValue; 796 if (value == null) { 797 value = new TypedValue(); 798 } 799 getValue(id, value, true); 800 if (value.type >= TypedValue.TYPE_FIRST_INT 801 && value.type <= TypedValue.TYPE_LAST_INT) { 802 mTmpValue = value; 803 return value.data; 804 } else if (value.type != TypedValue.TYPE_STRING) { 805 throw new NotFoundException( 806 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 807 + Integer.toHexString(value.type) + " is not valid"); 808 } 809 mTmpValue = null; 810 } 811 ColorStateList csl = loadColorStateList(value, id); 812 synchronized (mAccessLock) { 813 if (mTmpValue == null) { 814 mTmpValue = value; 815 } 816 } 817 return csl.getDefaultColor(); 818 } 819 820 /** 821 * Return a color state list associated with a particular resource ID. The 822 * resource may contain either a single raw color value, or a complex 823 * {@link android.content.res.ColorStateList} holding multiple possible colors. 824 * 825 * @param id The desired resource identifier of a {@link ColorStateList}, 826 * as generated by the aapt tool. This integer encodes the package, type, and resource 827 * entry. The value 0 is an invalid identifier. 828 * 829 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 830 * 831 * @return Returns a ColorStateList object containing either a single 832 * solid color or multiple colors that can be selected based on a state. 833 */ 834 public ColorStateList getColorStateList(int id) throws NotFoundException { 835 TypedValue value; 836 synchronized (mAccessLock) { 837 value = mTmpValue; 838 if (value == null) { 839 value = new TypedValue(); 840 } else { 841 mTmpValue = null; 842 } 843 getValue(id, value, true); 844 } 845 ColorStateList res = loadColorStateList(value, id); 846 synchronized (mAccessLock) { 847 if (mTmpValue == null) { 848 mTmpValue = value; 849 } 850 } 851 return res; 852 } 853 854 /** 855 * Return a boolean associated with a particular resource ID. This can be 856 * used with any integral resource value, and will return true if it is 857 * non-zero. 858 * 859 * @param id The desired resource identifier, as generated by the aapt 860 * tool. This integer encodes the package, type, and resource 861 * entry. The value 0 is an invalid identifier. 862 * 863 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 864 * 865 * @return Returns the boolean value contained in the resource. 866 */ 867 public boolean getBoolean(int id) throws NotFoundException { 868 synchronized (mAccessLock) { 869 TypedValue value = mTmpValue; 870 if (value == null) { 871 mTmpValue = value = new TypedValue(); 872 } 873 getValue(id, value, true); 874 if (value.type >= TypedValue.TYPE_FIRST_INT 875 && value.type <= TypedValue.TYPE_LAST_INT) { 876 return value.data != 0; 877 } 878 throw new NotFoundException( 879 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 880 + Integer.toHexString(value.type) + " is not valid"); 881 } 882 } 883 884 /** 885 * Return an integer associated with a particular resource ID. 886 * 887 * @param id The desired resource identifier, as generated by the aapt 888 * tool. This integer encodes the package, type, and resource 889 * entry. The value 0 is an invalid identifier. 890 * 891 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 892 * 893 * @return Returns the integer value contained in the resource. 894 */ 895 public int getInteger(int id) throws NotFoundException { 896 synchronized (mAccessLock) { 897 TypedValue value = mTmpValue; 898 if (value == null) { 899 mTmpValue = value = new TypedValue(); 900 } 901 getValue(id, value, true); 902 if (value.type >= TypedValue.TYPE_FIRST_INT 903 && value.type <= TypedValue.TYPE_LAST_INT) { 904 return value.data; 905 } 906 throw new NotFoundException( 907 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 908 + Integer.toHexString(value.type) + " is not valid"); 909 } 910 } 911 912 /** 913 * Return an XmlResourceParser through which you can read a view layout 914 * description for the given resource ID. This parser has limited 915 * functionality -- in particular, you can't change its input, and only 916 * the high-level events are available. 917 * 918 * <p>This function is really a simple wrapper for calling 919 * {@link #getXml} with a layout resource. 920 * 921 * @param id The desired resource identifier, as generated by the aapt 922 * tool. This integer encodes the package, type, and resource 923 * entry. The value 0 is an invalid identifier. 924 * 925 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 926 * 927 * @return A new parser object through which you can read 928 * the XML data. 929 * 930 * @see #getXml 931 */ 932 public XmlResourceParser getLayout(int id) throws NotFoundException { 933 return loadXmlResourceParser(id, "layout"); 934 } 935 936 /** 937 * Return an XmlResourceParser through which you can read an animation 938 * description for the given resource ID. This parser has limited 939 * functionality -- in particular, you can't change its input, and only 940 * the high-level events are available. 941 * 942 * <p>This function is really a simple wrapper for calling 943 * {@link #getXml} with an animation resource. 944 * 945 * @param id The desired resource identifier, as generated by the aapt 946 * tool. This integer encodes the package, type, and resource 947 * entry. The value 0 is an invalid identifier. 948 * 949 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 950 * 951 * @return A new parser object through which you can read 952 * the XML data. 953 * 954 * @see #getXml 955 */ 956 public XmlResourceParser getAnimation(int id) throws NotFoundException { 957 return loadXmlResourceParser(id, "anim"); 958 } 959 960 /** 961 * Return an XmlResourceParser through which you can read a generic XML 962 * resource for the given resource ID. 963 * 964 * <p>The XmlPullParser implementation returned here has some limited 965 * functionality. In particular, you can't change its input, and only 966 * high-level parsing events are available (since the document was 967 * pre-parsed for you at build time, which involved merging text and 968 * stripping comments). 969 * 970 * @param id The desired resource identifier, as generated by the aapt 971 * tool. This integer encodes the package, type, and resource 972 * entry. The value 0 is an invalid identifier. 973 * 974 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 975 * 976 * @return A new parser object through which you can read 977 * the XML data. 978 * 979 * @see android.util.AttributeSet 980 */ 981 public XmlResourceParser getXml(int id) throws NotFoundException { 982 return loadXmlResourceParser(id, "xml"); 983 } 984 985 /** 986 * Open a data stream for reading a raw resource. This can only be used 987 * with resources whose value is the name of an asset files -- that is, it can be 988 * used to open drawable, sound, and raw resources; it will fail on string 989 * and color resources. 990 * 991 * @param id The resource identifier to open, as generated by the appt 992 * tool. 993 * 994 * @return InputStream Access to the resource data. 995 * 996 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 997 * 998 */ 999 public InputStream openRawResource(int id) throws NotFoundException { 1000 TypedValue value; 1001 synchronized (mAccessLock) { 1002 value = mTmpValue; 1003 if (value == null) { 1004 value = new TypedValue(); 1005 } else { 1006 mTmpValue = null; 1007 } 1008 } 1009 InputStream res = openRawResource(id, value); 1010 synchronized (mAccessLock) { 1011 if (mTmpValue == null) { 1012 mTmpValue = value; 1013 } 1014 } 1015 return res; 1016 } 1017 1018 /** 1019 * Open a data stream for reading a raw resource. This can only be used 1020 * with resources whose value is the name of an asset file -- that is, it can be 1021 * used to open drawable, sound, and raw resources; it will fail on string 1022 * and color resources. 1023 * 1024 * @param id The resource identifier to open, as generated by the appt tool. 1025 * @param value The TypedValue object to hold the resource information. 1026 * 1027 * @return InputStream Access to the resource data. 1028 * 1029 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1030 */ 1031 public InputStream openRawResource(int id, TypedValue value) throws NotFoundException { 1032 getValue(id, value, true); 1033 1034 try { 1035 return mAssets.openNonAsset(value.assetCookie, value.string.toString(), 1036 AssetManager.ACCESS_STREAMING); 1037 } catch (Exception e) { 1038 NotFoundException rnf = new NotFoundException("File " + value.string.toString() + 1039 " from drawable resource ID #0x" + Integer.toHexString(id)); 1040 rnf.initCause(e); 1041 throw rnf; 1042 } 1043 } 1044 1045 /** 1046 * Open a file descriptor for reading a raw resource. This can only be used 1047 * with resources whose value is the name of an asset files -- that is, it can be 1048 * used to open drawable, sound, and raw resources; it will fail on string 1049 * and color resources. 1050 * 1051 * <p>This function only works for resources that are stored in the package 1052 * as uncompressed data, which typically includes things like mp3 files 1053 * and png images. 1054 * 1055 * @param id The resource identifier to open, as generated by the appt 1056 * tool. 1057 * 1058 * @return AssetFileDescriptor A new file descriptor you can use to read 1059 * the resource. This includes the file descriptor itself, as well as the 1060 * offset and length of data where the resource appears in the file. A 1061 * null is returned if the file exists but is compressed. 1062 * 1063 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1064 * 1065 */ 1066 public AssetFileDescriptor openRawResourceFd(int id) throws NotFoundException { 1067 TypedValue value; 1068 synchronized (mAccessLock) { 1069 value = mTmpValue; 1070 if (value == null) { 1071 value = new TypedValue(); 1072 } else { 1073 mTmpValue = null; 1074 } 1075 getValue(id, value, true); 1076 } 1077 try { 1078 return mAssets.openNonAssetFd( 1079 value.assetCookie, value.string.toString()); 1080 } catch (Exception e) { 1081 NotFoundException rnf = new NotFoundException( 1082 "File " + value.string.toString() 1083 + " from drawable resource ID #0x" 1084 + Integer.toHexString(id)); 1085 rnf.initCause(e); 1086 throw rnf; 1087 } finally { 1088 synchronized (mAccessLock) { 1089 if (mTmpValue == null) { 1090 mTmpValue = value; 1091 } 1092 } 1093 } 1094 } 1095 1096 /** 1097 * Return the raw data associated with a particular resource ID. 1098 * 1099 * @param id The desired resource identifier, as generated by the aapt 1100 * tool. This integer encodes the package, type, and resource 1101 * entry. The value 0 is an invalid identifier. 1102 * @param outValue Object in which to place the resource data. 1103 * @param resolveRefs If true, a resource that is a reference to another 1104 * resource will be followed so that you receive the 1105 * actual final resource data. If false, the TypedValue 1106 * will be filled in with the reference itself. 1107 * 1108 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1109 * 1110 */ 1111 public void getValue(int id, TypedValue outValue, boolean resolveRefs) 1112 throws NotFoundException { 1113 boolean found = mAssets.getResourceValue(id, 0, outValue, resolveRefs); 1114 if (found) { 1115 return; 1116 } 1117 throw new NotFoundException("Resource ID #0x" 1118 + Integer.toHexString(id)); 1119 } 1120 1121 /** 1122 * Get the raw value associated with a resource with associated density. 1123 * 1124 * @param id resource identifier 1125 * @param density density in DPI 1126 * @param resolveRefs If true, a resource that is a reference to another 1127 * resource will be followed so that you receive the actual final 1128 * resource data. If false, the TypedValue will be filled in with 1129 * the reference itself. 1130 * @throws NotFoundException Throws NotFoundException if the given ID does 1131 * not exist. 1132 * @see #getValue(String, TypedValue, boolean) 1133 */ 1134 public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs) 1135 throws NotFoundException { 1136 boolean found = mAssets.getResourceValue(id, density, outValue, resolveRefs); 1137 if (found) { 1138 return; 1139 } 1140 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)); 1141 } 1142 1143 /** 1144 * Return the raw data associated with a particular resource ID. 1145 * See getIdentifier() for information on how names are mapped to resource 1146 * IDs, and getString(int) for information on how string resources are 1147 * retrieved. 1148 * 1149 * <p>Note: use of this function is discouraged. It is much more 1150 * efficient to retrieve resources by identifier than by name. 1151 * 1152 * @param name The name of the desired resource. This is passed to 1153 * getIdentifier() with a default type of "string". 1154 * @param outValue Object in which to place the resource data. 1155 * @param resolveRefs If true, a resource that is a reference to another 1156 * resource will be followed so that you receive the 1157 * actual final resource data. If false, the TypedValue 1158 * will be filled in with the reference itself. 1159 * 1160 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1161 * 1162 */ 1163 public void getValue(String name, TypedValue outValue, boolean resolveRefs) 1164 throws NotFoundException { 1165 int id = getIdentifier(name, "string", null); 1166 if (id != 0) { 1167 getValue(id, outValue, resolveRefs); 1168 return; 1169 } 1170 throw new NotFoundException("String resource name " + name); 1171 } 1172 1173 /** 1174 * This class holds the current attribute values for a particular theme. 1175 * In other words, a Theme is a set of values for resource attributes; 1176 * these are used in conjunction with {@link TypedArray} 1177 * to resolve the final value for an attribute. 1178 * 1179 * <p>The Theme's attributes come into play in two ways: (1) a styled 1180 * attribute can explicit reference a value in the theme through the 1181 * "?themeAttribute" syntax; (2) if no value has been defined for a 1182 * particular styled attribute, as a last resort we will try to find that 1183 * attribute's value in the Theme. 1184 * 1185 * <p>You will normally use the {@link #obtainStyledAttributes} APIs to 1186 * retrieve XML attributes with style and theme information applied. 1187 */ 1188 public final class Theme { 1189 /** 1190 * Place new attribute values into the theme. The style resource 1191 * specified by <var>resid</var> will be retrieved from this Theme's 1192 * resources, its values placed into the Theme object. 1193 * 1194 * <p>The semantics of this function depends on the <var>force</var> 1195 * argument: If false, only values that are not already defined in 1196 * the theme will be copied from the system resource; otherwise, if 1197 * any of the style's attributes are already defined in the theme, the 1198 * current values in the theme will be overwritten. 1199 * 1200 * @param resid The resource ID of a style resource from which to 1201 * obtain attribute values. 1202 * @param force If true, values in the style resource will always be 1203 * used in the theme; otherwise, they will only be used 1204 * if not already defined in the theme. 1205 */ 1206 public void applyStyle(int resid, boolean force) { 1207 AssetManager.applyThemeStyle(mTheme, resid, force); 1208 } 1209 1210 /** 1211 * Set this theme to hold the same contents as the theme 1212 * <var>other</var>. If both of these themes are from the same 1213 * Resources object, they will be identical after this function 1214 * returns. If they are from different Resources, only the resources 1215 * they have in common will be set in this theme. 1216 * 1217 * @param other The existing Theme to copy from. 1218 */ 1219 public void setTo(Theme other) { 1220 AssetManager.copyTheme(mTheme, other.mTheme); 1221 } 1222 1223 /** 1224 * Return a TypedArray holding the values defined by 1225 * <var>Theme</var> which are listed in <var>attrs</var>. 1226 * 1227 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1228 * with the array. 1229 * 1230 * @param attrs The desired attributes. 1231 * 1232 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1233 * 1234 * @return Returns a TypedArray holding an array of the attribute values. 1235 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1236 * when done with it. 1237 * 1238 * @see Resources#obtainAttributes 1239 * @see #obtainStyledAttributes(int, int[]) 1240 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1241 */ 1242 public TypedArray obtainStyledAttributes(int[] attrs) { 1243 int len = attrs.length; 1244 TypedArray array = getCachedStyledAttributes(len); 1245 array.mRsrcs = attrs; 1246 AssetManager.applyStyle(mTheme, 0, 0, 0, attrs, 1247 array.mData, array.mIndices); 1248 return array; 1249 } 1250 1251 /** 1252 * Return a TypedArray holding the values defined by the style 1253 * resource <var>resid</var> which are listed in <var>attrs</var>. 1254 * 1255 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1256 * with the array. 1257 * 1258 * @param resid The desired style resource. 1259 * @param attrs The desired attributes in the style. 1260 * 1261 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1262 * 1263 * @return Returns a TypedArray holding an array of the attribute values. 1264 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1265 * when done with it. 1266 * 1267 * @see Resources#obtainAttributes 1268 * @see #obtainStyledAttributes(int[]) 1269 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1270 */ 1271 public TypedArray obtainStyledAttributes(int resid, int[] attrs) 1272 throws NotFoundException { 1273 int len = attrs.length; 1274 TypedArray array = getCachedStyledAttributes(len); 1275 array.mRsrcs = attrs; 1276 1277 AssetManager.applyStyle(mTheme, 0, resid, 0, attrs, 1278 array.mData, array.mIndices); 1279 if (false) { 1280 int[] data = array.mData; 1281 1282 System.out.println("**********************************************************"); 1283 System.out.println("**********************************************************"); 1284 System.out.println("**********************************************************"); 1285 System.out.println("Attributes:"); 1286 String s = " Attrs:"; 1287 int i; 1288 for (i=0; i<attrs.length; i++) { 1289 s = s + " 0x" + Integer.toHexString(attrs[i]); 1290 } 1291 System.out.println(s); 1292 s = " Found:"; 1293 TypedValue value = new TypedValue(); 1294 for (i=0; i<attrs.length; i++) { 1295 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1296 value.type = data[d+AssetManager.STYLE_TYPE]; 1297 value.data = data[d+AssetManager.STYLE_DATA]; 1298 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1299 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1300 s = s + " 0x" + Integer.toHexString(attrs[i]) 1301 + "=" + value; 1302 } 1303 System.out.println(s); 1304 } 1305 return array; 1306 } 1307 1308 /** 1309 * Return a TypedArray holding the attribute values in 1310 * <var>set</var> 1311 * that are listed in <var>attrs</var>. In addition, if the given 1312 * AttributeSet specifies a style class (through the "style" attribute), 1313 * that style will be applied on top of the base attributes it defines. 1314 * 1315 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1316 * with the array. 1317 * 1318 * <p>When determining the final value of a particular attribute, there 1319 * are four inputs that come into play:</p> 1320 * 1321 * <ol> 1322 * <li> Any attribute values in the given AttributeSet. 1323 * <li> The style resource specified in the AttributeSet (named 1324 * "style"). 1325 * <li> The default style specified by <var>defStyleAttr</var> and 1326 * <var>defStyleRes</var> 1327 * <li> The base values in this theme. 1328 * </ol> 1329 * 1330 * <p>Each of these inputs is considered in-order, with the first listed 1331 * taking precedence over the following ones. In other words, if in the 1332 * AttributeSet you have supplied <code><Button 1333 * textColor="#ff000000"></code>, then the button's text will 1334 * <em>always</em> be black, regardless of what is specified in any of 1335 * the styles. 1336 * 1337 * @param set The base set of attribute values. May be null. 1338 * @param attrs The desired attributes to be retrieved. 1339 * @param defStyleAttr An attribute in the current theme that contains a 1340 * reference to a style resource that supplies 1341 * defaults values for the TypedArray. Can be 1342 * 0 to not look for defaults. 1343 * @param defStyleRes A resource identifier of a style resource that 1344 * supplies default values for the TypedArray, 1345 * used only if defStyleAttr is 0 or can not be found 1346 * in the theme. Can be 0 to not look for defaults. 1347 * 1348 * @return Returns a TypedArray holding an array of the attribute values. 1349 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1350 * when done with it. 1351 * 1352 * @see Resources#obtainAttributes 1353 * @see #obtainStyledAttributes(int[]) 1354 * @see #obtainStyledAttributes(int, int[]) 1355 */ 1356 public TypedArray obtainStyledAttributes(AttributeSet set, 1357 int[] attrs, int defStyleAttr, int defStyleRes) { 1358 int len = attrs.length; 1359 TypedArray array = getCachedStyledAttributes(len); 1360 1361 // XXX note that for now we only work with compiled XML files. 1362 // To support generic XML files we will need to manually parse 1363 // out the attributes from the XML file (applying type information 1364 // contained in the resources and such). 1365 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1366 AssetManager.applyStyle( 1367 mTheme, defStyleAttr, defStyleRes, 1368 parser != null ? parser.mParseState : 0, attrs, 1369 array.mData, array.mIndices); 1370 1371 array.mRsrcs = attrs; 1372 array.mXml = parser; 1373 1374 if (false) { 1375 int[] data = array.mData; 1376 1377 System.out.println("Attributes:"); 1378 String s = " Attrs:"; 1379 int i; 1380 for (i=0; i<set.getAttributeCount(); i++) { 1381 s = s + " " + set.getAttributeName(i); 1382 int id = set.getAttributeNameResource(i); 1383 if (id != 0) { 1384 s = s + "(0x" + Integer.toHexString(id) + ")"; 1385 } 1386 s = s + "=" + set.getAttributeValue(i); 1387 } 1388 System.out.println(s); 1389 s = " Found:"; 1390 TypedValue value = new TypedValue(); 1391 for (i=0; i<attrs.length; i++) { 1392 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1393 value.type = data[d+AssetManager.STYLE_TYPE]; 1394 value.data = data[d+AssetManager.STYLE_DATA]; 1395 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1396 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1397 s = s + " 0x" + Integer.toHexString(attrs[i]) 1398 + "=" + value; 1399 } 1400 System.out.println(s); 1401 } 1402 1403 return array; 1404 } 1405 1406 /** 1407 * Retrieve the value of an attribute in the Theme. The contents of 1408 * <var>outValue</var> are ultimately filled in by 1409 * {@link Resources#getValue}. 1410 * 1411 * @param resid The resource identifier of the desired theme 1412 * attribute. 1413 * @param outValue Filled in with the ultimate resource value supplied 1414 * by the attribute. 1415 * @param resolveRefs If true, resource references will be walked; if 1416 * false, <var>outValue</var> may be a 1417 * TYPE_REFERENCE. In either case, it will never 1418 * be a TYPE_ATTRIBUTE. 1419 * 1420 * @return boolean Returns true if the attribute was found and 1421 * <var>outValue</var> is valid, else false. 1422 */ 1423 public boolean resolveAttribute(int resid, TypedValue outValue, 1424 boolean resolveRefs) { 1425 boolean got = mAssets.getThemeValue(mTheme, resid, outValue, resolveRefs); 1426 if (false) { 1427 System.out.println( 1428 "resolveAttribute #" + Integer.toHexString(resid) 1429 + " got=" + got + ", type=0x" + Integer.toHexString(outValue.type) 1430 + ", data=0x" + Integer.toHexString(outValue.data)); 1431 } 1432 return got; 1433 } 1434 1435 /** 1436 * Print contents of this theme out to the log. For debugging only. 1437 * 1438 * @param priority The log priority to use. 1439 * @param tag The log tag to use. 1440 * @param prefix Text to prefix each line printed. 1441 */ 1442 public void dump(int priority, String tag, String prefix) { 1443 AssetManager.dumpTheme(mTheme, priority, tag, prefix); 1444 } 1445 1446 protected void finalize() throws Throwable { 1447 super.finalize(); 1448 mAssets.releaseTheme(mTheme); 1449 } 1450 1451 /*package*/ Theme() { 1452 mAssets = Resources.this.mAssets; 1453 mTheme = mAssets.createTheme(); 1454 } 1455 1456 private final AssetManager mAssets; 1457 private final int mTheme; 1458 } 1459 1460 /** 1461 * Generate a new Theme object for this set of Resources. It initially 1462 * starts out empty. 1463 * 1464 * @return Theme The newly created Theme container. 1465 */ 1466 public final Theme newTheme() { 1467 return new Theme(); 1468 } 1469 1470 /** 1471 * Retrieve a set of basic attribute values from an AttributeSet, not 1472 * performing styling of them using a theme and/or style resources. 1473 * 1474 * @param set The current attribute values to retrieve. 1475 * @param attrs The specific attributes to be retrieved. 1476 * @return Returns a TypedArray holding an array of the attribute values. 1477 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1478 * when done with it. 1479 * 1480 * @see Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 1481 */ 1482 public TypedArray obtainAttributes(AttributeSet set, int[] attrs) { 1483 int len = attrs.length; 1484 TypedArray array = getCachedStyledAttributes(len); 1485 1486 // XXX note that for now we only work with compiled XML files. 1487 // To support generic XML files we will need to manually parse 1488 // out the attributes from the XML file (applying type information 1489 // contained in the resources and such). 1490 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1491 mAssets.retrieveAttributes(parser.mParseState, attrs, 1492 array.mData, array.mIndices); 1493 1494 array.mRsrcs = attrs; 1495 array.mXml = parser; 1496 1497 return array; 1498 } 1499 1500 /** 1501 * Store the newly updated configuration. 1502 */ 1503 public void updateConfiguration(Configuration config, 1504 DisplayMetrics metrics) { 1505 updateConfiguration(config, metrics, null); 1506 } 1507 1508 /** 1509 * @hide 1510 */ 1511 public void updateConfiguration(Configuration config, 1512 DisplayMetrics metrics, CompatibilityInfo compat) { 1513 synchronized (mAccessLock) { 1514 if (false) { 1515 Slog.i(TAG, "**** Updating config of " + this + ": old config is " 1516 + mConfiguration + " old compat is " + mCompatibilityInfo); 1517 Slog.i(TAG, "**** Updating config of " + this + ": new config is " 1518 + config + " new compat is " + compat); 1519 } 1520 if (compat != null) { 1521 mCompatibilityInfo = compat; 1522 } 1523 if (metrics != null) { 1524 mMetrics.setTo(metrics); 1525 } 1526 // NOTE: We should re-arrange this code to create a Display 1527 // with the CompatibilityInfo that is used everywhere we deal 1528 // with the display in relation to this app, rather than 1529 // doing the conversion here. This impl should be okay because 1530 // we make sure to return a compatible display in the places 1531 // where there are public APIs to retrieve the display... but 1532 // it would be cleaner and more maintainble to just be 1533 // consistently dealing with a compatible display everywhere in 1534 // the framework. 1535 if (mCompatibilityInfo != null) { 1536 mCompatibilityInfo.applyToDisplayMetrics(mMetrics); 1537 } 1538 int configChanges = 0xfffffff; 1539 if (config != null) { 1540 mTmpConfig.setTo(config); 1541 int density = config.densityDpi; 1542 if (density == Configuration.DENSITY_DPI_UNDEFINED) { 1543 density = mMetrics.noncompatDensityDpi; 1544 } 1545 if (mCompatibilityInfo != null) { 1546 mCompatibilityInfo.applyToConfiguration(density, mTmpConfig); 1547 } 1548 if (mTmpConfig.locale == null) { 1549 mTmpConfig.locale = Locale.getDefault(); 1550 mTmpConfig.setLayoutDirection(mTmpConfig.locale); 1551 } 1552 configChanges = mConfiguration.updateFrom(mTmpConfig); 1553 configChanges = ActivityInfo.activityInfoConfigToNative(configChanges); 1554 } 1555 if (mConfiguration.locale == null) { 1556 mConfiguration.locale = Locale.getDefault(); 1557 mConfiguration.setLayoutDirection(mConfiguration.locale); 1558 } 1559 if (mConfiguration.densityDpi != Configuration.DENSITY_DPI_UNDEFINED) { 1560 mMetrics.densityDpi = mConfiguration.densityDpi; 1561 mMetrics.density = mConfiguration.densityDpi * DisplayMetrics.DENSITY_DEFAULT_SCALE; 1562 } 1563 mMetrics.scaledDensity = mMetrics.density * mConfiguration.fontScale; 1564 1565 String locale = null; 1566 if (mConfiguration.locale != null) { 1567 locale = mConfiguration.locale.getLanguage(); 1568 if (mConfiguration.locale.getCountry() != null) { 1569 locale += "-" + mConfiguration.locale.getCountry(); 1570 } 1571 } 1572 int width, height; 1573 if (mMetrics.widthPixels >= mMetrics.heightPixels) { 1574 width = mMetrics.widthPixels; 1575 height = mMetrics.heightPixels; 1576 } else { 1577 //noinspection SuspiciousNameCombination 1578 width = mMetrics.heightPixels; 1579 //noinspection SuspiciousNameCombination 1580 height = mMetrics.widthPixels; 1581 } 1582 int keyboardHidden = mConfiguration.keyboardHidden; 1583 if (keyboardHidden == Configuration.KEYBOARDHIDDEN_NO 1584 && mConfiguration.hardKeyboardHidden 1585 == Configuration.HARDKEYBOARDHIDDEN_YES) { 1586 keyboardHidden = Configuration.KEYBOARDHIDDEN_SOFT; 1587 } 1588 mAssets.setConfiguration(mConfiguration.mcc, mConfiguration.mnc, 1589 locale, mConfiguration.orientation, 1590 mConfiguration.touchscreen, 1591 mConfiguration.densityDpi, mConfiguration.keyboard, 1592 keyboardHidden, mConfiguration.navigation, width, height, 1593 mConfiguration.smallestScreenWidthDp, 1594 mConfiguration.screenWidthDp, mConfiguration.screenHeightDp, 1595 mConfiguration.screenLayout, mConfiguration.uiMode, 1596 Build.VERSION.RESOURCES_SDK_INT); 1597 1598 if (DEBUG_CONFIG) { 1599 Slog.i(TAG, "**** Updating config of " + this + ": final config is " + mConfiguration 1600 + " final compat is " + mCompatibilityInfo); 1601 } 1602 1603 clearDrawableCacheLocked(mDrawableCache, configChanges); 1604 clearDrawableCacheLocked(mColorDrawableCache, configChanges); 1605 1606 mColorStateListCache.clear(); 1607 1608 flushLayoutCache(); 1609 } 1610 synchronized (sSync) { 1611 if (mPluralRule != null) { 1612 mPluralRule = NativePluralRules.forLocale(config.locale); 1613 } 1614 } 1615 } 1616 1617 private void clearDrawableCacheLocked( 1618 LongSparseArray<WeakReference<ConstantState>> cache, 1619 int configChanges) { 1620 int N = cache.size(); 1621 if (DEBUG_CONFIG) { 1622 Log.d(TAG, "Cleaning up drawables config changes: 0x" 1623 + Integer.toHexString(configChanges)); 1624 } 1625 for (int i=0; i<N; i++) { 1626 WeakReference<Drawable.ConstantState> ref = cache.valueAt(i); 1627 if (ref != null) { 1628 Drawable.ConstantState cs = ref.get(); 1629 if (cs != null) { 1630 if (Configuration.needNewResources( 1631 configChanges, cs.getChangingConfigurations())) { 1632 if (DEBUG_CONFIG) { 1633 Log.d(TAG, "FLUSHING #0x" 1634 + Long.toHexString(mDrawableCache.keyAt(i)) 1635 + " / " + cs + " with changes: 0x" 1636 + Integer.toHexString(cs.getChangingConfigurations())); 1637 } 1638 cache.setValueAt(i, null); 1639 } else if (DEBUG_CONFIG) { 1640 Log.d(TAG, "(Keeping #0x" 1641 + Long.toHexString(cache.keyAt(i)) 1642 + " / " + cs + " with changes: 0x" 1643 + Integer.toHexString(cs.getChangingConfigurations()) 1644 + ")"); 1645 } 1646 } 1647 } 1648 } 1649 } 1650 1651 /** 1652 * Update the system resources configuration if they have previously 1653 * been initialized. 1654 * 1655 * @hide 1656 */ 1657 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics, 1658 CompatibilityInfo compat) { 1659 if (mSystem != null) { 1660 mSystem.updateConfiguration(config, metrics, compat); 1661 //Log.i(TAG, "Updated system resources " + mSystem 1662 // + ": " + mSystem.getConfiguration()); 1663 } 1664 } 1665 1666 /** 1667 * @hide 1668 */ 1669 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics) { 1670 updateSystemConfiguration(config, metrics, null); 1671 } 1672 1673 /** 1674 * Return the current display metrics that are in effect for this resource 1675 * object. The returned object should be treated as read-only. 1676 * 1677 * @return The resource's current display metrics. 1678 */ 1679 public DisplayMetrics getDisplayMetrics() { 1680 if (DEBUG_CONFIG) Slog.v(TAG, "Returning DisplayMetrics: " + mMetrics.widthPixels 1681 + "x" + mMetrics.heightPixels + " " + mMetrics.density); 1682 return mMetrics; 1683 } 1684 1685 /** 1686 * Return the current configuration that is in effect for this resource 1687 * object. The returned object should be treated as read-only. 1688 * 1689 * @return The resource's current configuration. 1690 */ 1691 public Configuration getConfiguration() { 1692 return mConfiguration; 1693 } 1694 1695 /** 1696 * Return the compatibility mode information for the application. 1697 * The returned object should be treated as read-only. 1698 * 1699 * @return compatibility info. 1700 * @hide 1701 */ 1702 public CompatibilityInfo getCompatibilityInfo() { 1703 return mCompatibilityInfo != null ? mCompatibilityInfo 1704 : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 1705 } 1706 1707 /** 1708 * This is just for testing. 1709 * @hide 1710 */ 1711 public void setCompatibilityInfo(CompatibilityInfo ci) { 1712 mCompatibilityInfo = ci; 1713 updateConfiguration(mConfiguration, mMetrics); 1714 } 1715 1716 /** 1717 * Return a resource identifier for the given resource name. A fully 1718 * qualified resource name is of the form "package:type/entry". The first 1719 * two components (package and type) are optional if defType and 1720 * defPackage, respectively, are specified here. 1721 * 1722 * <p>Note: use of this function is discouraged. It is much more 1723 * efficient to retrieve resources by identifier than by name. 1724 * 1725 * @param name The name of the desired resource. 1726 * @param defType Optional default resource type to find, if "type/" is 1727 * not included in the name. Can be null to require an 1728 * explicit type. 1729 * @param defPackage Optional default package to find, if "package:" is 1730 * not included in the name. Can be null to require an 1731 * explicit package. 1732 * 1733 * @return int The associated resource identifier. Returns 0 if no such 1734 * resource was found. (0 is not a valid resource ID.) 1735 */ 1736 public int getIdentifier(String name, String defType, String defPackage) { 1737 if (name == null) { 1738 throw new NullPointerException("name is null"); 1739 } 1740 try { 1741 return Integer.parseInt(name); 1742 } catch (Exception e) { 1743 // Ignore 1744 } 1745 return mAssets.getResourceIdentifier(name, defType, defPackage); 1746 } 1747 1748 /** 1749 * Return true if given resource identifier includes a package. 1750 * 1751 * @hide 1752 */ 1753 public static boolean resourceHasPackage(int resid) { 1754 return (resid >>> 24) != 0; 1755 } 1756 1757 /** 1758 * Return the full name for a given resource identifier. This name is 1759 * a single string of the form "package:type/entry". 1760 * 1761 * @param resid The resource identifier whose name is to be retrieved. 1762 * 1763 * @return A string holding the name of the resource. 1764 * 1765 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1766 * 1767 * @see #getResourcePackageName 1768 * @see #getResourceTypeName 1769 * @see #getResourceEntryName 1770 */ 1771 public String getResourceName(int resid) throws NotFoundException { 1772 String str = mAssets.getResourceName(resid); 1773 if (str != null) return str; 1774 throw new NotFoundException("Unable to find resource ID #0x" 1775 + Integer.toHexString(resid)); 1776 } 1777 1778 /** 1779 * Return the package name for a given resource identifier. 1780 * 1781 * @param resid The resource identifier whose package name is to be 1782 * retrieved. 1783 * 1784 * @return A string holding the package name of the resource. 1785 * 1786 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1787 * 1788 * @see #getResourceName 1789 */ 1790 public String getResourcePackageName(int resid) throws NotFoundException { 1791 String str = mAssets.getResourcePackageName(resid); 1792 if (str != null) return str; 1793 throw new NotFoundException("Unable to find resource ID #0x" 1794 + Integer.toHexString(resid)); 1795 } 1796 1797 /** 1798 * Return the type name for a given resource identifier. 1799 * 1800 * @param resid The resource identifier whose type name is to be 1801 * retrieved. 1802 * 1803 * @return A string holding the type name of the resource. 1804 * 1805 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1806 * 1807 * @see #getResourceName 1808 */ 1809 public String getResourceTypeName(int resid) throws NotFoundException { 1810 String str = mAssets.getResourceTypeName(resid); 1811 if (str != null) return str; 1812 throw new NotFoundException("Unable to find resource ID #0x" 1813 + Integer.toHexString(resid)); 1814 } 1815 1816 /** 1817 * Return the entry name for a given resource identifier. 1818 * 1819 * @param resid The resource identifier whose entry name is to be 1820 * retrieved. 1821 * 1822 * @return A string holding the entry name of the resource. 1823 * 1824 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1825 * 1826 * @see #getResourceName 1827 */ 1828 public String getResourceEntryName(int resid) throws NotFoundException { 1829 String str = mAssets.getResourceEntryName(resid); 1830 if (str != null) return str; 1831 throw new NotFoundException("Unable to find resource ID #0x" 1832 + Integer.toHexString(resid)); 1833 } 1834 1835 /** 1836 * Parse a series of {@link android.R.styleable#Extra <extra>} tags from 1837 * an XML file. You call this when you are at the parent tag of the 1838 * extra tags, and it will return once all of the child tags have been parsed. 1839 * This will call {@link #parseBundleExtra} for each extra tag encountered. 1840 * 1841 * @param parser The parser from which to retrieve the extras. 1842 * @param outBundle A Bundle in which to place all parsed extras. 1843 * @throws XmlPullParserException 1844 * @throws IOException 1845 */ 1846 public void parseBundleExtras(XmlResourceParser parser, Bundle outBundle) 1847 throws XmlPullParserException, IOException { 1848 int outerDepth = parser.getDepth(); 1849 int type; 1850 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 1851 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1852 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1853 continue; 1854 } 1855 1856 String nodeName = parser.getName(); 1857 if (nodeName.equals("extra")) { 1858 parseBundleExtra("extra", parser, outBundle); 1859 XmlUtils.skipCurrentTag(parser); 1860 1861 } else { 1862 XmlUtils.skipCurrentTag(parser); 1863 } 1864 } 1865 } 1866 1867 /** 1868 * Parse a name/value pair out of an XML tag holding that data. The 1869 * AttributeSet must be holding the data defined by 1870 * {@link android.R.styleable#Extra}. The following value types are supported: 1871 * <ul> 1872 * <li> {@link TypedValue#TYPE_STRING}: 1873 * {@link Bundle#putCharSequence Bundle.putCharSequence()} 1874 * <li> {@link TypedValue#TYPE_INT_BOOLEAN}: 1875 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1876 * <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}: 1877 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1878 * <li> {@link TypedValue#TYPE_FLOAT}: 1879 * {@link Bundle#putCharSequence Bundle.putFloat()} 1880 * </ul> 1881 * 1882 * @param tagName The name of the tag these attributes come from; this is 1883 * only used for reporting error messages. 1884 * @param attrs The attributes from which to retrieve the name/value pair. 1885 * @param outBundle The Bundle in which to place the parsed value. 1886 * @throws XmlPullParserException If the attributes are not valid. 1887 */ 1888 public void parseBundleExtra(String tagName, AttributeSet attrs, 1889 Bundle outBundle) throws XmlPullParserException { 1890 TypedArray sa = obtainAttributes(attrs, 1891 com.android.internal.R.styleable.Extra); 1892 1893 String name = sa.getString( 1894 com.android.internal.R.styleable.Extra_name); 1895 if (name == null) { 1896 sa.recycle(); 1897 throw new XmlPullParserException("<" + tagName 1898 + "> requires an android:name attribute at " 1899 + attrs.getPositionDescription()); 1900 } 1901 1902 TypedValue v = sa.peekValue( 1903 com.android.internal.R.styleable.Extra_value); 1904 if (v != null) { 1905 if (v.type == TypedValue.TYPE_STRING) { 1906 CharSequence cs = v.coerceToString(); 1907 outBundle.putCharSequence(name, cs); 1908 } else if (v.type == TypedValue.TYPE_INT_BOOLEAN) { 1909 outBundle.putBoolean(name, v.data != 0); 1910 } else if (v.type >= TypedValue.TYPE_FIRST_INT 1911 && v.type <= TypedValue.TYPE_LAST_INT) { 1912 outBundle.putInt(name, v.data); 1913 } else if (v.type == TypedValue.TYPE_FLOAT) { 1914 outBundle.putFloat(name, v.getFloat()); 1915 } else { 1916 sa.recycle(); 1917 throw new XmlPullParserException("<" + tagName 1918 + "> only supports string, integer, float, color, and boolean at " 1919 + attrs.getPositionDescription()); 1920 } 1921 } else { 1922 sa.recycle(); 1923 throw new XmlPullParserException("<" + tagName 1924 + "> requires an android:value or android:resource attribute at " 1925 + attrs.getPositionDescription()); 1926 } 1927 1928 sa.recycle(); 1929 } 1930 1931 /** 1932 * Retrieve underlying AssetManager storage for these resources. 1933 */ 1934 public final AssetManager getAssets() { 1935 return mAssets; 1936 } 1937 1938 /** 1939 * Call this to remove all cached loaded layout resources from the 1940 * Resources object. Only intended for use with performance testing 1941 * tools. 1942 */ 1943 public final void flushLayoutCache() { 1944 synchronized (mCachedXmlBlockIds) { 1945 // First see if this block is in our cache. 1946 final int num = mCachedXmlBlockIds.length; 1947 for (int i=0; i<num; i++) { 1948 mCachedXmlBlockIds[i] = -0; 1949 XmlBlock oldBlock = mCachedXmlBlocks[i]; 1950 if (oldBlock != null) { 1951 oldBlock.close(); 1952 } 1953 mCachedXmlBlocks[i] = null; 1954 } 1955 } 1956 } 1957 1958 /** 1959 * Start preloading of resource data using this Resources object. Only 1960 * for use by the zygote process for loading common system resources. 1961 * {@hide} 1962 */ 1963 public final void startPreloading() { 1964 synchronized (sSync) { 1965 if (sPreloaded) { 1966 throw new IllegalStateException("Resources already preloaded"); 1967 } 1968 sPreloaded = true; 1969 mPreloading = true; 1970 sPreloadedDensity = DisplayMetrics.DENSITY_DEVICE; 1971 mConfiguration.densityDpi = sPreloadedDensity; 1972 updateConfiguration(null, null); 1973 } 1974 } 1975 1976 /** 1977 * Called by zygote when it is done preloading resources, to change back 1978 * to normal Resources operation. 1979 */ 1980 public final void finishPreloading() { 1981 if (mPreloading) { 1982 mPreloading = false; 1983 flushLayoutCache(); 1984 } 1985 } 1986 1987 /** 1988 * @hide 1989 */ 1990 public LongSparseArray<Drawable.ConstantState> getPreloadedDrawables() { 1991 return sPreloadedDrawables[0]; 1992 } 1993 1994 private boolean verifyPreloadConfig(int changingConfigurations, int allowVarying, 1995 int resourceId, String name) { 1996 // We allow preloading of resources even if they vary by font scale (which 1997 // doesn't impact resource selection) or density (which we handle specially by 1998 // simply turning off all preloading), as well as any other configs specified 1999 // by the caller. 2000 if (((changingConfigurations&~(ActivityInfo.CONFIG_FONT_SCALE | 2001 ActivityInfo.CONFIG_DENSITY)) & ~allowVarying) != 0) { 2002 String resName; 2003 try { 2004 resName = getResourceName(resourceId); 2005 } catch (NotFoundException e) { 2006 resName = "?"; 2007 } 2008 Log.w(TAG, "Preloaded " + name + " resource #0x" 2009 + Integer.toHexString(resourceId) 2010 + " (" + resName + ") that varies with configuration!!"); 2011 return false; 2012 } 2013 if (TRACE_FOR_PRELOAD) { 2014 String resName; 2015 try { 2016 resName = getResourceName(resourceId); 2017 } catch (NotFoundException e) { 2018 resName = "?"; 2019 } 2020 Log.w(TAG, "Preloading " + name + " resource #0x" 2021 + Integer.toHexString(resourceId) 2022 + " (" + resName + ")"); 2023 } 2024 return true; 2025 } 2026 2027 static private final int LAYOUT_DIR_CONFIG = ActivityInfo.activityInfoConfigToNative( 2028 ActivityInfo.CONFIG_LAYOUT_DIRECTION); 2029 2030 /*package*/ Drawable loadDrawable(TypedValue value, int id) 2031 throws NotFoundException { 2032 2033 if (TRACE_FOR_PRELOAD) { 2034 // Log only framework resources 2035 if ((id >>> 24) == 0x1) { 2036 final String name = getResourceName(id); 2037 if (name != null) android.util.Log.d("PreloadDrawable", name); 2038 } 2039 } 2040 2041 boolean isColorDrawable = false; 2042 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2043 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2044 isColorDrawable = true; 2045 } 2046 final long key = isColorDrawable ? value.data : 2047 (((long) value.assetCookie) << 32) | value.data; 2048 2049 Drawable dr = getCachedDrawable(isColorDrawable ? mColorDrawableCache : mDrawableCache, key); 2050 2051 if (dr != null) { 2052 return dr; 2053 } 2054 Drawable.ConstantState cs; 2055 if (isColorDrawable) { 2056 cs = sPreloadedColorDrawables.get(key); 2057 } else { 2058 cs = sPreloadedDrawables[mConfiguration.getLayoutDirection()].get(key); 2059 } 2060 if (cs != null) { 2061 dr = cs.newDrawable(this); 2062 } else { 2063 if (isColorDrawable) { 2064 dr = new ColorDrawable(value.data); 2065 } 2066 2067 if (dr == null) { 2068 if (value.string == null) { 2069 throw new NotFoundException( 2070 "Resource is not a Drawable (color or path): " + value); 2071 } 2072 2073 String file = value.string.toString(); 2074 2075 if (TRACE_FOR_MISS_PRELOAD) { 2076 // Log only framework resources 2077 if ((id >>> 24) == 0x1) { 2078 final String name = getResourceName(id); 2079 if (name != null) android.util.Log.d(TAG, "Loading framework drawable #" 2080 + Integer.toHexString(id) + ": " + name 2081 + " at " + file); 2082 } 2083 } 2084 2085 if (DEBUG_LOAD) Log.v(TAG, "Loading drawable for cookie " 2086 + value.assetCookie + ": " + file); 2087 2088 if (file.endsWith(".xml")) { 2089 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2090 try { 2091 XmlResourceParser rp = loadXmlResourceParser( 2092 file, id, value.assetCookie, "drawable"); 2093 dr = Drawable.createFromXml(this, rp); 2094 rp.close(); 2095 } catch (Exception e) { 2096 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2097 NotFoundException rnf = new NotFoundException( 2098 "File " + file + " from drawable resource ID #0x" 2099 + Integer.toHexString(id)); 2100 rnf.initCause(e); 2101 throw rnf; 2102 } 2103 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2104 2105 } else { 2106 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2107 try { 2108 InputStream is = mAssets.openNonAsset( 2109 value.assetCookie, file, AssetManager.ACCESS_STREAMING); 2110 // System.out.println("Opened file " + file + ": " + is); 2111 dr = Drawable.createFromResourceStream(this, value, is, 2112 file, null); 2113 is.close(); 2114 // System.out.println("Created stream: " + dr); 2115 } catch (Exception e) { 2116 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2117 NotFoundException rnf = new NotFoundException( 2118 "File " + file + " from drawable resource ID #0x" 2119 + Integer.toHexString(id)); 2120 rnf.initCause(e); 2121 throw rnf; 2122 } 2123 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2124 } 2125 } 2126 } 2127 2128 if (dr != null) { 2129 dr.setChangingConfigurations(value.changingConfigurations); 2130 cs = dr.getConstantState(); 2131 if (cs != null) { 2132 if (mPreloading) { 2133 final int changingConfigs = cs.getChangingConfigurations(); 2134 if (isColorDrawable) { 2135 if (verifyPreloadConfig(changingConfigs, 0, value.resourceId, 2136 "drawable")) { 2137 sPreloadedColorDrawables.put(key, cs); 2138 } 2139 } else { 2140 if (verifyPreloadConfig(changingConfigs, 2141 LAYOUT_DIR_CONFIG, value.resourceId, "drawable")) { 2142 if ((changingConfigs&LAYOUT_DIR_CONFIG) == 0) { 2143 // If this resource does not vary based on layout direction, 2144 // we can put it in all of the preload maps. 2145 sPreloadedDrawables[0].put(key, cs); 2146 sPreloadedDrawables[1].put(key, cs); 2147 } else { 2148 // Otherwise, only in the layout dir we loaded it for. 2149 final LongSparseArray<Drawable.ConstantState> preloads 2150 = sPreloadedDrawables[mConfiguration.getLayoutDirection()]; 2151 preloads.put(key, cs); 2152 } 2153 } 2154 } 2155 } else { 2156 synchronized (mAccessLock) { 2157 //Log.i(TAG, "Saving cached drawable @ #" + 2158 // Integer.toHexString(key.intValue()) 2159 // + " in " + this + ": " + cs); 2160 if (isColorDrawable) { 2161 mColorDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 2162 } else { 2163 mDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 2164 } 2165 } 2166 } 2167 } 2168 } 2169 2170 return dr; 2171 } 2172 2173 private Drawable getCachedDrawable( 2174 LongSparseArray<WeakReference<ConstantState>> drawableCache, 2175 long key) { 2176 synchronized (mAccessLock) { 2177 WeakReference<Drawable.ConstantState> wr = drawableCache.get(key); 2178 if (wr != null) { // we have the key 2179 Drawable.ConstantState entry = wr.get(); 2180 if (entry != null) { 2181 //Log.i(TAG, "Returning cached drawable @ #" + 2182 // Integer.toHexString(((Integer)key).intValue()) 2183 // + " in " + this + ": " + entry); 2184 return entry.newDrawable(this); 2185 } 2186 else { // our entry has been purged 2187 drawableCache.delete(key); 2188 } 2189 } 2190 } 2191 return null; 2192 } 2193 2194 /*package*/ ColorStateList loadColorStateList(TypedValue value, int id) 2195 throws NotFoundException { 2196 if (TRACE_FOR_PRELOAD) { 2197 // Log only framework resources 2198 if ((id >>> 24) == 0x1) { 2199 final String name = getResourceName(id); 2200 if (name != null) android.util.Log.d("PreloadColorStateList", name); 2201 } 2202 } 2203 2204 final long key = (((long) value.assetCookie) << 32) | value.data; 2205 2206 ColorStateList csl; 2207 2208 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2209 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2210 2211 csl = sPreloadedColorStateLists.get(key); 2212 if (csl != null) { 2213 return csl; 2214 } 2215 2216 csl = ColorStateList.valueOf(value.data); 2217 if (mPreloading) { 2218 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2219 "color")) { 2220 sPreloadedColorStateLists.put(key, csl); 2221 } 2222 } 2223 2224 return csl; 2225 } 2226 2227 csl = getCachedColorStateList(key); 2228 if (csl != null) { 2229 return csl; 2230 } 2231 2232 csl = sPreloadedColorStateLists.get(key); 2233 if (csl != null) { 2234 return csl; 2235 } 2236 2237 if (value.string == null) { 2238 throw new NotFoundException( 2239 "Resource is not a ColorStateList (color or path): " + value); 2240 } 2241 2242 String file = value.string.toString(); 2243 2244 if (file.endsWith(".xml")) { 2245 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2246 try { 2247 XmlResourceParser rp = loadXmlResourceParser( 2248 file, id, value.assetCookie, "colorstatelist"); 2249 csl = ColorStateList.createFromXml(this, rp); 2250 rp.close(); 2251 } catch (Exception e) { 2252 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2253 NotFoundException rnf = new NotFoundException( 2254 "File " + file + " from color state list resource ID #0x" 2255 + Integer.toHexString(id)); 2256 rnf.initCause(e); 2257 throw rnf; 2258 } 2259 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2260 } else { 2261 throw new NotFoundException( 2262 "File " + file + " from drawable resource ID #0x" 2263 + Integer.toHexString(id) + ": .xml extension required"); 2264 } 2265 2266 if (csl != null) { 2267 if (mPreloading) { 2268 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2269 "color")) { 2270 sPreloadedColorStateLists.put(key, csl); 2271 } 2272 } else { 2273 synchronized (mAccessLock) { 2274 //Log.i(TAG, "Saving cached color state list @ #" + 2275 // Integer.toHexString(key.intValue()) 2276 // + " in " + this + ": " + csl); 2277 mColorStateListCache.put(key, new WeakReference<ColorStateList>(csl)); 2278 } 2279 } 2280 } 2281 2282 return csl; 2283 } 2284 2285 private ColorStateList getCachedColorStateList(long key) { 2286 synchronized (mAccessLock) { 2287 WeakReference<ColorStateList> wr = mColorStateListCache.get(key); 2288 if (wr != null) { // we have the key 2289 ColorStateList entry = wr.get(); 2290 if (entry != null) { 2291 //Log.i(TAG, "Returning cached color state list @ #" + 2292 // Integer.toHexString(((Integer)key).intValue()) 2293 // + " in " + this + ": " + entry); 2294 return entry; 2295 } else { // our entry has been purged 2296 mColorStateListCache.delete(key); 2297 } 2298 } 2299 } 2300 return null; 2301 } 2302 2303 /*package*/ XmlResourceParser loadXmlResourceParser(int id, String type) 2304 throws NotFoundException { 2305 synchronized (mAccessLock) { 2306 TypedValue value = mTmpValue; 2307 if (value == null) { 2308 mTmpValue = value = new TypedValue(); 2309 } 2310 getValue(id, value, true); 2311 if (value.type == TypedValue.TYPE_STRING) { 2312 return loadXmlResourceParser(value.string.toString(), id, 2313 value.assetCookie, type); 2314 } 2315 throw new NotFoundException( 2316 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 2317 + Integer.toHexString(value.type) + " is not valid"); 2318 } 2319 } 2320 2321 /*package*/ XmlResourceParser loadXmlResourceParser(String file, int id, 2322 int assetCookie, String type) throws NotFoundException { 2323 if (id != 0) { 2324 try { 2325 // These may be compiled... 2326 synchronized (mCachedXmlBlockIds) { 2327 // First see if this block is in our cache. 2328 final int num = mCachedXmlBlockIds.length; 2329 for (int i=0; i<num; i++) { 2330 if (mCachedXmlBlockIds[i] == id) { 2331 //System.out.println("**** REUSING XML BLOCK! id=" 2332 // + id + ", index=" + i); 2333 return mCachedXmlBlocks[i].newParser(); 2334 } 2335 } 2336 2337 // Not in the cache, create a new block and put it at 2338 // the next slot in the cache. 2339 XmlBlock block = mAssets.openXmlBlockAsset( 2340 assetCookie, file); 2341 if (block != null) { 2342 int pos = mLastCachedXmlBlockIndex+1; 2343 if (pos >= num) pos = 0; 2344 mLastCachedXmlBlockIndex = pos; 2345 XmlBlock oldBlock = mCachedXmlBlocks[pos]; 2346 if (oldBlock != null) { 2347 oldBlock.close(); 2348 } 2349 mCachedXmlBlockIds[pos] = id; 2350 mCachedXmlBlocks[pos] = block; 2351 //System.out.println("**** CACHING NEW XML BLOCK! id=" 2352 // + id + ", index=" + pos); 2353 return block.newParser(); 2354 } 2355 } 2356 } catch (Exception e) { 2357 NotFoundException rnf = new NotFoundException( 2358 "File " + file + " from xml type " + type + " resource ID #0x" 2359 + Integer.toHexString(id)); 2360 rnf.initCause(e); 2361 throw rnf; 2362 } 2363 } 2364 2365 throw new NotFoundException( 2366 "File " + file + " from xml type " + type + " resource ID #0x" 2367 + Integer.toHexString(id)); 2368 } 2369 2370 private TypedArray getCachedStyledAttributes(int len) { 2371 synchronized (mAccessLock) { 2372 TypedArray attrs = mCachedStyledAttributes; 2373 if (attrs != null) { 2374 mCachedStyledAttributes = null; 2375 if (DEBUG_ATTRIBUTES_CACHE) { 2376 mLastRetrievedAttrs = new RuntimeException("here"); 2377 mLastRetrievedAttrs.fillInStackTrace(); 2378 } 2379 2380 attrs.mLength = len; 2381 int fullLen = len * AssetManager.STYLE_NUM_ENTRIES; 2382 if (attrs.mData.length >= fullLen) { 2383 return attrs; 2384 } 2385 attrs.mData = new int[fullLen]; 2386 attrs.mIndices = new int[1+len]; 2387 return attrs; 2388 } 2389 if (DEBUG_ATTRIBUTES_CACHE) { 2390 RuntimeException here = new RuntimeException("here"); 2391 here.fillInStackTrace(); 2392 if (mLastRetrievedAttrs != null) { 2393 Log.i(TAG, "Allocated new TypedArray of " + len + " in " + this, here); 2394 Log.i(TAG, "Last retrieved attributes here", mLastRetrievedAttrs); 2395 } 2396 mLastRetrievedAttrs = here; 2397 } 2398 return new TypedArray(this, 2399 new int[len*AssetManager.STYLE_NUM_ENTRIES], 2400 new int[1+len], len); 2401 } 2402 } 2403 2404 private Resources() { 2405 mAssets = AssetManager.getSystem(); 2406 // NOTE: Intentionally leaving this uninitialized (all values set 2407 // to zero), so that anyone who tries to do something that requires 2408 // metrics will get a very wrong value. 2409 mConfiguration.setToDefaults(); 2410 mMetrics.setToDefaults(); 2411 updateConfiguration(null, null); 2412 mAssets.ensureStringBlocks(); 2413 mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 2414 } 2415} 2416