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