Resources.java revision 836c0a8b949d71293c996761691e065f0651acef
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 android.view.ViewDebug; 20import com.android.internal.util.XmlUtils; 21 22import org.xmlpull.v1.XmlPullParser; 23import org.xmlpull.v1.XmlPullParserException; 24 25import android.annotation.Nullable; 26import android.content.pm.ActivityInfo; 27import android.graphics.Movie; 28import android.graphics.drawable.Drawable; 29import android.graphics.drawable.ColorDrawable; 30import android.graphics.drawable.Drawable.ConstantState; 31import android.os.Build; 32import android.os.Bundle; 33import android.os.IBinder; 34import android.os.Trace; 35import android.util.ArrayMap; 36import android.util.AttributeSet; 37import android.util.DisplayMetrics; 38import android.util.Log; 39import android.util.Slog; 40import android.util.TypedValue; 41import android.util.LongSparseArray; 42 43import java.io.IOException; 44import java.io.InputStream; 45import java.lang.ref.WeakReference; 46import java.util.Locale; 47 48import libcore.icu.NativePluralRules; 49 50/** 51 * Class for accessing an application's resources. This sits on top of the 52 * asset manager of the application (accessible through {@link #getAssets}) and 53 * provides a high-level API for getting typed data from the assets. 54 * 55 * <p>The Android resource system keeps track of all non-code assets associated with an 56 * application. You can use this class to access your application's resources. You can generally 57 * acquire the {@link android.content.res.Resources} instance associated with your application 58 * with {@link android.content.Context#getResources getResources()}.</p> 59 * 60 * <p>The Android SDK tools compile your application's resources into the application binary 61 * at build time. To use a resource, you must install it correctly in the source tree (inside 62 * your project's {@code res/} directory) and build your application. As part of the build 63 * process, the SDK tools generate symbols for each resource, which you can use in your application 64 * code to access the resources.</p> 65 * 66 * <p>Using application resources makes it easy to update various characteristics of your 67 * application without modifying code, and—by providing sets of alternative 68 * resources—enables you to optimize your application for a variety of device configurations 69 * (such as for different languages and screen sizes). This is an important aspect of developing 70 * Android applications that are compatible on different types of devices.</p> 71 * 72 * <p>For more information about using resources, see the documentation about <a 73 * href="{@docRoot}guide/topics/resources/index.html">Application Resources</a>.</p> 74 */ 75public class Resources { 76 static final String TAG = "Resources"; 77 78 private static final boolean DEBUG_LOAD = false; 79 private static final boolean DEBUG_CONFIG = false; 80 private static final boolean TRACE_FOR_PRELOAD = false; 81 private static final boolean TRACE_FOR_MISS_PRELOAD = false; 82 83 private static final int LAYOUT_DIR_CONFIG = ActivityInfo.activityInfoConfigToNative( 84 ActivityInfo.CONFIG_LAYOUT_DIRECTION); 85 86 private static final int ID_OTHER = 0x01000004; 87 88 private static final Object sSync = new Object(); 89 90 // Information about preloaded resources. Note that they are not 91 // protected by a lock, because while preloading in zygote we are all 92 // single-threaded, and after that these are immutable. 93 private static final LongSparseArray<ConstantState>[] sPreloadedDrawables; 94 private static final LongSparseArray<ConstantState> sPreloadedColorDrawables 95 = new LongSparseArray<ConstantState>(); 96 private static final LongSparseArray<ColorStateList> sPreloadedColorStateLists 97 = new LongSparseArray<ColorStateList>(); 98 99 // Used by BridgeResources in layoutlib 100 static Resources mSystem = null; 101 102 private static boolean sPreloaded; 103 private static int sPreloadedDensity; 104 105 // These are protected by mAccessLock. 106 private final Object mAccessLock = new Object(); 107 private final Configuration mTmpConfig = new Configuration(); 108 private final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> mDrawableCache = 109 new ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>>(); 110 private final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> mColorDrawableCache = 111 new ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>>(); 112 private final LongSparseArray<WeakReference<ColorStateList>> mColorStateListCache = 113 new LongSparseArray<WeakReference<ColorStateList>>(); 114 115 private TypedValue mTmpValue = new TypedValue(); 116 private boolean mPreloading; 117 118 private TypedArray mCachedStyledAttributes = null; 119 120 private int mLastCachedXmlBlockIndex = -1; 121 private final int[] mCachedXmlBlockIds = { 0, 0, 0, 0 }; 122 private final XmlBlock[] mCachedXmlBlocks = new XmlBlock[4]; 123 124 private final AssetManager mAssets; 125 private final Configuration mConfiguration = new Configuration(); 126 private final DisplayMetrics mMetrics = new DisplayMetrics(); 127 private NativePluralRules mPluralRule; 128 129 private CompatibilityInfo mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 130 131 @SuppressWarnings("unused") 132 private WeakReference<IBinder> mToken; 133 134 static { 135 sPreloadedDrawables = new LongSparseArray[2]; 136 sPreloadedDrawables[0] = new LongSparseArray<ConstantState>(); 137 sPreloadedDrawables[1] = new LongSparseArray<ConstantState>(); 138 } 139 140 /** 141 * Returns the most appropriate default theme for the specified target SDK version. 142 * <ul> 143 * <li>Below API 11: Gingerbread 144 * <li>APIs 11 thru 14: Holo 145 * <li>APIs 14 thru XX: Device default dark 146 * <li>API XX and above: Device default light with dark action bar 147 * </ul> 148 * 149 * @param curTheme The current theme, or 0 if not specified. 150 * @param targetSdkVersion The target SDK version. 151 * @return A theme resource identifier 152 * @hide 153 */ 154 public static int selectDefaultTheme(int curTheme, int targetSdkVersion) { 155 return selectSystemTheme(curTheme, targetSdkVersion, 156 com.android.internal.R.style.Theme, 157 com.android.internal.R.style.Theme_Holo, 158 com.android.internal.R.style.Theme_DeviceDefault, 159 com.android.internal.R.style.Theme_DeviceDefault_Light_DarkActionBar); 160 } 161 162 /** @hide */ 163 public static int selectSystemTheme(int curTheme, int targetSdkVersion, int orig, int holo, 164 int dark, int deviceDefault) { 165 if (curTheme != 0) { 166 return curTheme; 167 } 168 if (targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) { 169 return orig; 170 } 171 if (targetSdkVersion < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 172 return holo; 173 } 174 if (targetSdkVersion < Build.VERSION_CODES.CUR_DEVELOPMENT) { 175 return dark; 176 } 177 return deviceDefault; 178 } 179 180 /** 181 * This exception is thrown by the resource APIs when a requested resource 182 * can not be found. 183 */ 184 public static class NotFoundException extends RuntimeException { 185 public NotFoundException() { 186 } 187 188 public NotFoundException(String name) { 189 super(name); 190 } 191 } 192 193 /** 194 * Create a new Resources object on top of an existing set of assets in an 195 * AssetManager. 196 * 197 * @param assets Previously created AssetManager. 198 * @param metrics Current display metrics to consider when 199 * selecting/computing resource values. 200 * @param config Desired device configuration to consider when 201 * selecting/computing resource values (optional). 202 */ 203 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config) { 204 this(assets, metrics, config, CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO, null); 205 } 206 207 /** 208 * Creates a new Resources object with CompatibilityInfo. 209 * 210 * @param assets Previously created AssetManager. 211 * @param metrics Current display metrics to consider when 212 * selecting/computing resource values. 213 * @param config Desired device configuration to consider when 214 * selecting/computing resource values (optional). 215 * @param compatInfo this resource's compatibility info. Must not be null. 216 * @param token The Activity token for determining stack affiliation. Usually null. 217 * @hide 218 */ 219 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config, 220 CompatibilityInfo compatInfo, IBinder token) { 221 mAssets = assets; 222 mMetrics.setToDefaults(); 223 if (compatInfo != null) { 224 mCompatibilityInfo = compatInfo; 225 } 226 mToken = new WeakReference<IBinder>(token); 227 updateConfiguration(config, metrics); 228 assets.ensureStringBlocks(); 229 } 230 231 /** 232 * Return a global shared Resources object that provides access to only 233 * system resources (no application resources), and is not configured for 234 * the current screen (can not use dimension units, does not change based 235 * on orientation, etc). 236 */ 237 public static Resources getSystem() { 238 synchronized (sSync) { 239 Resources ret = mSystem; 240 if (ret == null) { 241 ret = new Resources(); 242 mSystem = ret; 243 } 244 245 return ret; 246 } 247 } 248 249 /** 250 * Return the string value associated with a particular resource ID. The 251 * returned object will be a String if this is a plain string; it will be 252 * some other type of CharSequence if it is styled. 253 * {@more} 254 * 255 * @param id The desired resource identifier, as generated by the aapt 256 * tool. This integer encodes the package, type, and resource 257 * entry. The value 0 is an invalid identifier. 258 * 259 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 260 * 261 * @return CharSequence The string data associated with the resource, plus 262 * possibly styled text information. 263 */ 264 public CharSequence getText(int id) throws NotFoundException { 265 CharSequence res = mAssets.getResourceText(id); 266 if (res != null) { 267 return res; 268 } 269 throw new NotFoundException("String resource ID #0x" 270 + Integer.toHexString(id)); 271 } 272 273 /** 274 * Returns the character sequence necessary for grammatically correct pluralization 275 * of the given resource ID for the given quantity. 276 * Note that the character sequence is selected based solely on grammatical necessity, 277 * and that such rules differ between languages. Do not assume you know which string 278 * will be returned for a given quantity. See 279 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 280 * for more detail. 281 * 282 * @param id The desired resource identifier, as generated by the aapt 283 * tool. This integer encodes the package, type, and resource 284 * entry. The value 0 is an invalid identifier. 285 * @param quantity The number used to get the correct string for the current language's 286 * plural rules. 287 * 288 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 289 * 290 * @return CharSequence The string data associated with the resource, plus 291 * possibly styled text information. 292 */ 293 public CharSequence getQuantityText(int id, int quantity) throws NotFoundException { 294 NativePluralRules rule = getPluralRule(); 295 CharSequence res = mAssets.getResourceBagText(id, 296 attrForQuantityCode(rule.quantityForInt(quantity))); 297 if (res != null) { 298 return res; 299 } 300 res = mAssets.getResourceBagText(id, ID_OTHER); 301 if (res != null) { 302 return res; 303 } 304 throw new NotFoundException("Plural resource ID #0x" + Integer.toHexString(id) 305 + " quantity=" + quantity 306 + " item=" + stringForQuantityCode(rule.quantityForInt(quantity))); 307 } 308 309 private NativePluralRules getPluralRule() { 310 synchronized (sSync) { 311 if (mPluralRule == null) { 312 mPluralRule = NativePluralRules.forLocale(mConfiguration.locale); 313 } 314 return mPluralRule; 315 } 316 } 317 318 private static int attrForQuantityCode(int quantityCode) { 319 switch (quantityCode) { 320 case NativePluralRules.ZERO: return 0x01000005; 321 case NativePluralRules.ONE: return 0x01000006; 322 case NativePluralRules.TWO: return 0x01000007; 323 case NativePluralRules.FEW: return 0x01000008; 324 case NativePluralRules.MANY: return 0x01000009; 325 default: return ID_OTHER; 326 } 327 } 328 329 private static String stringForQuantityCode(int quantityCode) { 330 switch (quantityCode) { 331 case NativePluralRules.ZERO: return "zero"; 332 case NativePluralRules.ONE: return "one"; 333 case NativePluralRules.TWO: return "two"; 334 case NativePluralRules.FEW: return "few"; 335 case NativePluralRules.MANY: return "many"; 336 default: return "other"; 337 } 338 } 339 340 /** 341 * Return the string value associated with a particular resource ID. It 342 * will be stripped of any styled text information. 343 * {@more} 344 * 345 * @param id The desired resource identifier, as generated by the aapt 346 * tool. This integer encodes the package, type, and resource 347 * entry. The value 0 is an invalid identifier. 348 * 349 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 350 * 351 * @return String The string data associated with the resource, 352 * stripped of styled text information. 353 */ 354 public String getString(int id) throws NotFoundException { 355 CharSequence res = getText(id); 356 if (res != null) { 357 return res.toString(); 358 } 359 throw new NotFoundException("String resource ID #0x" 360 + Integer.toHexString(id)); 361 } 362 363 364 /** 365 * Return the string value associated with a particular resource ID, 366 * substituting the format arguments as defined in {@link java.util.Formatter} 367 * and {@link java.lang.String#format}. It will be stripped of any styled text 368 * information. 369 * {@more} 370 * 371 * @param id The desired resource identifier, as generated by the aapt 372 * tool. This integer encodes the package, type, and resource 373 * entry. The value 0 is an invalid identifier. 374 * 375 * @param formatArgs The format arguments that will be used for substitution. 376 * 377 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 378 * 379 * @return String The string data associated with the resource, 380 * stripped of styled text information. 381 */ 382 public String getString(int id, Object... formatArgs) throws NotFoundException { 383 String raw = getString(id); 384 return String.format(mConfiguration.locale, raw, formatArgs); 385 } 386 387 /** 388 * Formats the string necessary for grammatically correct pluralization 389 * of the given resource ID for the given quantity, using the given arguments. 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 * <p>Substitution of format arguments works as if using 397 * {@link java.util.Formatter} and {@link java.lang.String#format}. 398 * The resulting string will be stripped of any styled text information. 399 * 400 * @param id The desired resource identifier, as generated by the aapt 401 * tool. This integer encodes the package, type, and resource 402 * entry. The value 0 is an invalid identifier. 403 * @param quantity The number used to get the correct string for the current language's 404 * plural rules. 405 * @param formatArgs The format arguments that will be used for substitution. 406 * 407 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 408 * 409 * @return String The string data associated with the resource, 410 * stripped of styled text information. 411 */ 412 public String getQuantityString(int id, int quantity, Object... formatArgs) 413 throws NotFoundException { 414 String raw = getQuantityText(id, quantity).toString(); 415 return String.format(mConfiguration.locale, raw, formatArgs); 416 } 417 418 /** 419 * Returns the string necessary for grammatically correct pluralization 420 * of the given resource ID for the given quantity. 421 * Note that the string is selected based solely on grammatical necessity, 422 * and that such rules differ between languages. Do not assume you know which string 423 * will be returned for a given quantity. See 424 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 425 * for more detail. 426 * 427 * @param id The desired resource identifier, as generated by the aapt 428 * tool. This integer encodes the package, type, and resource 429 * entry. The value 0 is an invalid identifier. 430 * @param quantity The number used to get the correct string for the current language's 431 * plural rules. 432 * 433 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 434 * 435 * @return String The string data associated with the resource, 436 * stripped of styled text information. 437 */ 438 public String getQuantityString(int id, int quantity) throws NotFoundException { 439 return getQuantityText(id, quantity).toString(); 440 } 441 442 /** 443 * Return the string value associated with a particular resource ID. The 444 * returned object will be a String if this is a plain string; it will be 445 * some other type of CharSequence if it is styled. 446 * 447 * @param id The desired resource identifier, as generated by the aapt 448 * tool. This integer encodes the package, type, and resource 449 * entry. The value 0 is an invalid identifier. 450 * 451 * @param def The default CharSequence to return. 452 * 453 * @return CharSequence The string data associated with the resource, plus 454 * possibly styled text information, or def if id is 0 or not found. 455 */ 456 public CharSequence getText(int id, CharSequence def) { 457 CharSequence res = id != 0 ? mAssets.getResourceText(id) : null; 458 return res != null ? res : def; 459 } 460 461 /** 462 * Return the styled text array associated with a particular resource ID. 463 * 464 * @param id The desired resource identifier, as generated by the aapt 465 * tool. This integer encodes the package, type, and resource 466 * entry. The value 0 is an invalid identifier. 467 * 468 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 469 * 470 * @return The styled text array associated with the resource. 471 */ 472 public CharSequence[] getTextArray(int id) throws NotFoundException { 473 CharSequence[] res = mAssets.getResourceTextArray(id); 474 if (res != null) { 475 return res; 476 } 477 throw new NotFoundException("Text array resource ID #0x" 478 + Integer.toHexString(id)); 479 } 480 481 /** 482 * Return the string array associated with a particular resource ID. 483 * 484 * @param id The desired resource identifier, as generated by the aapt 485 * tool. This integer encodes the package, type, and resource 486 * entry. The value 0 is an invalid identifier. 487 * 488 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 489 * 490 * @return The string array associated with the resource. 491 */ 492 public String[] getStringArray(int id) throws NotFoundException { 493 String[] res = mAssets.getResourceStringArray(id); 494 if (res != null) { 495 return res; 496 } 497 throw new NotFoundException("String array resource ID #0x" 498 + Integer.toHexString(id)); 499 } 500 501 /** 502 * Return the int array associated with a particular resource ID. 503 * 504 * @param id The desired resource identifier, as generated by the aapt 505 * tool. This integer encodes the package, type, and resource 506 * entry. The value 0 is an invalid identifier. 507 * 508 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 509 * 510 * @return The int array associated with the resource. 511 */ 512 public int[] getIntArray(int id) throws NotFoundException { 513 int[] res = mAssets.getArrayIntResource(id); 514 if (res != null) { 515 return res; 516 } 517 throw new NotFoundException("Int array resource ID #0x" 518 + Integer.toHexString(id)); 519 } 520 521 /** 522 * Return an array of heterogeneous values. 523 * 524 * @param id The desired resource identifier, as generated by the aapt 525 * tool. This integer encodes the package, type, and resource 526 * entry. The value 0 is an invalid identifier. 527 * 528 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 529 * 530 * @return Returns a TypedArray holding an array of the array values. 531 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 532 * when done with it. 533 */ 534 public TypedArray obtainTypedArray(int id) throws NotFoundException { 535 int len = mAssets.getArraySize(id); 536 if (len < 0) { 537 throw new NotFoundException("Array resource ID #0x" 538 + Integer.toHexString(id)); 539 } 540 541 TypedArray array = TypedArray.obtain(this, len); 542 array.mLength = mAssets.retrieveArray(id, array.mData); 543 array.mIndices[0] = 0; 544 545 return array; 546 } 547 548 /** 549 * Retrieve a dimensional for a particular resource ID. Unit 550 * conversions are based on the current {@link DisplayMetrics} associated 551 * with the resources. 552 * 553 * @param id The desired resource identifier, as generated by the aapt 554 * tool. This integer encodes the package, type, and resource 555 * entry. The value 0 is an invalid identifier. 556 * 557 * @return Resource dimension value multiplied by the appropriate 558 * metric. 559 * 560 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 561 * 562 * @see #getDimensionPixelOffset 563 * @see #getDimensionPixelSize 564 */ 565 public float getDimension(int id) throws NotFoundException { 566 synchronized (mAccessLock) { 567 TypedValue value = mTmpValue; 568 if (value == null) { 569 mTmpValue = value = new TypedValue(); 570 } 571 getValue(id, value, true); 572 if (value.type == TypedValue.TYPE_DIMENSION) { 573 return TypedValue.complexToDimension(value.data, mMetrics); 574 } 575 throw new NotFoundException( 576 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 577 + Integer.toHexString(value.type) + " is not valid"); 578 } 579 } 580 581 /** 582 * Retrieve a dimensional for a particular resource ID for use 583 * as an offset in raw pixels. This is the same as 584 * {@link #getDimension}, except the returned value is converted to 585 * integer pixels for you. An offset conversion involves simply 586 * truncating the base value to an integer. 587 * 588 * @param id The desired resource identifier, as generated by the aapt 589 * tool. This integer encodes the package, type, and resource 590 * entry. The value 0 is an invalid identifier. 591 * 592 * @return Resource dimension value multiplied by the appropriate 593 * metric and truncated to integer pixels. 594 * 595 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 596 * 597 * @see #getDimension 598 * @see #getDimensionPixelSize 599 */ 600 public int getDimensionPixelOffset(int id) throws NotFoundException { 601 synchronized (mAccessLock) { 602 TypedValue value = mTmpValue; 603 if (value == null) { 604 mTmpValue = value = new TypedValue(); 605 } 606 getValue(id, value, true); 607 if (value.type == TypedValue.TYPE_DIMENSION) { 608 return TypedValue.complexToDimensionPixelOffset( 609 value.data, mMetrics); 610 } 611 throw new NotFoundException( 612 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 613 + Integer.toHexString(value.type) + " is not valid"); 614 } 615 } 616 617 /** 618 * Retrieve a dimensional for a particular resource ID for use 619 * as a size in raw pixels. This is the same as 620 * {@link #getDimension}, except the returned value is converted to 621 * integer pixels for use as a size. A size conversion involves 622 * rounding the base value, and ensuring that a non-zero base value 623 * is at least one pixel in size. 624 * 625 * @param id The desired resource identifier, as generated by the aapt 626 * tool. This integer encodes the package, type, and resource 627 * entry. The value 0 is an invalid identifier. 628 * 629 * @return Resource dimension value multiplied by the appropriate 630 * metric and truncated to integer pixels. 631 * 632 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 633 * 634 * @see #getDimension 635 * @see #getDimensionPixelOffset 636 */ 637 public int getDimensionPixelSize(int id) throws NotFoundException { 638 synchronized (mAccessLock) { 639 TypedValue value = mTmpValue; 640 if (value == null) { 641 mTmpValue = value = new TypedValue(); 642 } 643 getValue(id, value, true); 644 if (value.type == TypedValue.TYPE_DIMENSION) { 645 return TypedValue.complexToDimensionPixelSize( 646 value.data, mMetrics); 647 } 648 throw new NotFoundException( 649 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 650 + Integer.toHexString(value.type) + " is not valid"); 651 } 652 } 653 654 /** 655 * Retrieve a fractional unit for a particular resource ID. 656 * 657 * @param id The desired resource identifier, as generated by the aapt 658 * tool. This integer encodes the package, type, and resource 659 * entry. The value 0 is an invalid identifier. 660 * @param base The base value of this fraction. In other words, a 661 * standard fraction is multiplied by this value. 662 * @param pbase The parent base value of this fraction. In other 663 * words, a parent fraction (nn%p) is multiplied by this 664 * value. 665 * 666 * @return Attribute fractional value multiplied by the appropriate 667 * base value. 668 * 669 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 670 */ 671 public float getFraction(int id, int base, int pbase) { 672 synchronized (mAccessLock) { 673 TypedValue value = mTmpValue; 674 if (value == null) { 675 mTmpValue = value = new TypedValue(); 676 } 677 getValue(id, value, true); 678 if (value.type == TypedValue.TYPE_FRACTION) { 679 return TypedValue.complexToFraction(value.data, base, pbase); 680 } 681 throw new NotFoundException( 682 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 683 + Integer.toHexString(value.type) + " is not valid"); 684 } 685 } 686 687 /** 688 * Return a drawable object associated with a particular resource ID. 689 * Various types of objects will be returned depending on the underlying 690 * resource -- for example, a solid color, PNG image, scalable image, etc. 691 * The Drawable API hides these implementation details. 692 * 693 * <p class="note"><strong>Note:</strong> Prior to 694 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, this function 695 * would not correctly retrieve the final configuration density when 696 * the resource ID passed here is an alias to another Drawable resource. 697 * This means that if the density configuration of the alias resource 698 * is different than the actual resource, the density of the returned 699 * Drawable would be incorrect, resulting in bad scaling. To work 700 * around this, you can instead retrieve the Drawable through 701 * {@link TypedArray#getDrawable TypedArray.getDrawable}. Use 702 * {@link android.content.Context#obtainStyledAttributes(int[]) 703 * Context.obtainStyledAttributes} with 704 * an array containing the resource ID of interest to create the TypedArray.</p> 705 * 706 * <p class="note"><strong>Note:</strong> To obtain a themed drawable, use 707 * {@link android.content.Context#getDrawable(int) Context.getDrawable(int)} 708 * or {@link #getDrawable(int, Theme)} passing the desired theme.</p> 709 * 710 * @param id The desired resource identifier, as generated by the aapt 711 * tool. This integer encodes the package, type, and resource 712 * entry. The value 0 is an invalid identifier. 713 * @return Drawable An object that can be used to draw this resource. 714 * @throws NotFoundException Throws NotFoundException if the given ID does 715 * not exist. 716 * @see #getDrawable(int, Theme) 717 */ 718 public Drawable getDrawable(int id) throws NotFoundException { 719 final Drawable d = getDrawable(id, null); 720 if (d.canApplyTheme()) { 721 Log.w(TAG, "Drawable " + getResourceName(id) + " has unresolved theme " 722 + "attributes! Consider using Resources.getDrawable(int, Theme) or " 723 + "Context.getDrawable(int).", new RuntimeException()); 724 } 725 return d; 726 } 727 728 /** 729 * Return a drawable object associated with a particular resource ID and 730 * styled for the specified theme. Various types of objects will be 731 * returned depending on the underlying resource -- for example, a solid 732 * color, PNG image, scalable image, etc. 733 * 734 * @param id The desired resource identifier, as generated by the aapt 735 * tool. This integer encodes the package, type, and resource 736 * entry. The value 0 is an invalid identifier. 737 * @param theme The theme used to style the drawable attributes, may be {@code null}. 738 * @return Drawable An object that can be used to draw this resource. 739 * @throws NotFoundException Throws NotFoundException if the given ID does 740 * not exist. 741 */ 742 public Drawable getDrawable(int id, @Nullable Theme theme) throws NotFoundException { 743 TypedValue value; 744 synchronized (mAccessLock) { 745 value = mTmpValue; 746 if (value == null) { 747 value = new TypedValue(); 748 } else { 749 mTmpValue = null; 750 } 751 getValue(id, value, true); 752 } 753 final Drawable res = loadDrawable(value, id, theme); 754 synchronized (mAccessLock) { 755 if (mTmpValue == null) { 756 mTmpValue = value; 757 } 758 } 759 return res; 760 } 761 762 /** 763 * Return a drawable object associated with a particular resource ID for the 764 * given screen density in DPI. This will set the drawable's density to be 765 * the device's density multiplied by the ratio of actual drawable density 766 * to requested density. This allows the drawable to be scaled up to the 767 * correct size if needed. Various types of objects will be returned 768 * depending on the underlying resource -- for example, a solid color, PNG 769 * image, scalable image, etc. The Drawable API hides these implementation 770 * details. 771 * 772 * <p class="note"><strong>Note:</strong> To obtain a themed drawable, use 773 * {@link android.content.Context#getDrawable(int) Context.getDrawable(int)} 774 * or {@link #getDrawableForDensity(int, int, Theme)} passing the desired 775 * theme.</p> 776 * 777 * @param id The desired resource identifier, as generated by the aapt tool. 778 * This integer encodes the package, type, and resource entry. 779 * The value 0 is an invalid identifier. 780 * @param density the desired screen density indicated by the resource as 781 * found in {@link DisplayMetrics}. 782 * @return Drawable An object that can be used to draw this resource. 783 * @throws NotFoundException Throws NotFoundException if the given ID does 784 * not exist. 785 * @see #getDrawableForDensity(int, int, Theme) 786 */ 787 public Drawable getDrawableForDensity(int id, int density) throws NotFoundException { 788 return getDrawableForDensity(id, density, null); 789 } 790 791 /** 792 * Return a drawable object associated with a particular resource ID for the 793 * given screen density in DPI and styled for the specified theme. 794 * 795 * @param id The desired resource identifier, as generated by the aapt tool. 796 * This integer encodes the package, type, and resource entry. 797 * The value 0 is an invalid identifier. 798 * @param density The desired screen density indicated by the resource as 799 * found in {@link DisplayMetrics}. 800 * @param theme The theme used to style the drawable attributes, may be {@code null}. 801 * @return Drawable An object that can be used to draw this resource. 802 * @throws NotFoundException Throws NotFoundException if the given ID does 803 * not exist. 804 */ 805 public Drawable getDrawableForDensity(int id, int density, @Nullable Theme theme) { 806 TypedValue value; 807 synchronized (mAccessLock) { 808 value = mTmpValue; 809 if (value == null) { 810 value = new TypedValue(); 811 } else { 812 mTmpValue = null; 813 } 814 getValueForDensity(id, density, value, true); 815 816 /* 817 * Pretend the requested density is actually the display density. If 818 * the drawable returned is not the requested density, then force it 819 * to be scaled later by dividing its density by the ratio of 820 * requested density to actual device density. Drawables that have 821 * undefined density or no density don't need to be handled here. 822 */ 823 if (value.density > 0 && value.density != TypedValue.DENSITY_NONE) { 824 if (value.density == density) { 825 value.density = mMetrics.densityDpi; 826 } else { 827 value.density = (value.density * mMetrics.densityDpi) / density; 828 } 829 } 830 } 831 832 final Drawable res = loadDrawable(value, id, theme); 833 synchronized (mAccessLock) { 834 if (mTmpValue == null) { 835 mTmpValue = value; 836 } 837 } 838 return res; 839 } 840 841 /** 842 * Return a movie object associated with the particular resource ID. 843 * @param id The desired resource identifier, as generated by the aapt 844 * tool. This integer encodes the package, type, and resource 845 * entry. The value 0 is an invalid identifier. 846 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 847 * 848 */ 849 public Movie getMovie(int id) throws NotFoundException { 850 InputStream is = openRawResource(id); 851 Movie movie = Movie.decodeStream(is); 852 try { 853 is.close(); 854 } 855 catch (java.io.IOException e) { 856 // don't care, since the return value is valid 857 } 858 return movie; 859 } 860 861 /** 862 * Return a color integer associated with a particular resource ID. 863 * If the resource holds a complex 864 * {@link android.content.res.ColorStateList}, then the default color from 865 * the set is returned. 866 * 867 * @param id The desired resource identifier, as generated by the aapt 868 * tool. This integer encodes the package, type, and resource 869 * entry. The value 0 is an invalid identifier. 870 * 871 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 872 * 873 * @return Returns a single color value in the form 0xAARRGGBB. 874 */ 875 public int getColor(int id) throws NotFoundException { 876 TypedValue value; 877 synchronized (mAccessLock) { 878 value = mTmpValue; 879 if (value == null) { 880 value = new TypedValue(); 881 } 882 getValue(id, value, true); 883 if (value.type >= TypedValue.TYPE_FIRST_INT 884 && value.type <= TypedValue.TYPE_LAST_INT) { 885 mTmpValue = value; 886 return value.data; 887 } else if (value.type != TypedValue.TYPE_STRING) { 888 throw new NotFoundException( 889 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 890 + Integer.toHexString(value.type) + " is not valid"); 891 } 892 mTmpValue = null; 893 } 894 ColorStateList csl = loadColorStateList(value, id); 895 synchronized (mAccessLock) { 896 if (mTmpValue == null) { 897 mTmpValue = value; 898 } 899 } 900 return csl.getDefaultColor(); 901 } 902 903 /** 904 * Return a color state list associated with a particular resource ID. The 905 * resource may contain either a single raw color value, or a complex 906 * {@link android.content.res.ColorStateList} holding multiple possible colors. 907 * 908 * @param id The desired resource identifier of a {@link ColorStateList}, 909 * as generated by the aapt tool. This integer encodes the package, type, and resource 910 * entry. The value 0 is an invalid identifier. 911 * 912 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 913 * 914 * @return Returns a ColorStateList object containing either a single 915 * solid color or multiple colors that can be selected based on a state. 916 */ 917 public ColorStateList getColorStateList(int id) throws NotFoundException { 918 TypedValue value; 919 synchronized (mAccessLock) { 920 value = mTmpValue; 921 if (value == null) { 922 value = new TypedValue(); 923 } else { 924 mTmpValue = null; 925 } 926 getValue(id, value, true); 927 } 928 ColorStateList res = loadColorStateList(value, id); 929 synchronized (mAccessLock) { 930 if (mTmpValue == null) { 931 mTmpValue = value; 932 } 933 } 934 return res; 935 } 936 937 /** 938 * Return a boolean associated with a particular resource ID. This can be 939 * used with any integral resource value, and will return true if it is 940 * non-zero. 941 * 942 * @param id The desired resource identifier, as generated by the aapt 943 * tool. This integer encodes the package, type, and resource 944 * entry. The value 0 is an invalid identifier. 945 * 946 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 947 * 948 * @return Returns the boolean value contained in the resource. 949 */ 950 public boolean getBoolean(int id) throws NotFoundException { 951 synchronized (mAccessLock) { 952 TypedValue value = mTmpValue; 953 if (value == null) { 954 mTmpValue = value = new TypedValue(); 955 } 956 getValue(id, value, true); 957 if (value.type >= TypedValue.TYPE_FIRST_INT 958 && value.type <= TypedValue.TYPE_LAST_INT) { 959 return value.data != 0; 960 } 961 throw new NotFoundException( 962 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 963 + Integer.toHexString(value.type) + " is not valid"); 964 } 965 } 966 967 /** 968 * Return an integer associated with a particular resource ID. 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 Returns the integer value contained in the resource. 977 */ 978 public int getInteger(int id) throws NotFoundException { 979 synchronized (mAccessLock) { 980 TypedValue value = mTmpValue; 981 if (value == null) { 982 mTmpValue = value = new TypedValue(); 983 } 984 getValue(id, value, true); 985 if (value.type >= TypedValue.TYPE_FIRST_INT 986 && value.type <= TypedValue.TYPE_LAST_INT) { 987 return value.data; 988 } 989 throw new NotFoundException( 990 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 991 + Integer.toHexString(value.type) + " is not valid"); 992 } 993 } 994 995 /** 996 * Retrieve a floating-point value for a particular resource ID. 997 * 998 * @param id The desired resource identifier, as generated by the aapt 999 * tool. This integer encodes the package, type, and resource 1000 * entry. The value 0 is an invalid identifier. 1001 * 1002 * @return Returns the floating-point value contained in the resource. 1003 * 1004 * @throws NotFoundException Throws NotFoundException if the given ID does 1005 * not exist or is not a floating-point value. 1006 * @hide Pending API council approval. 1007 */ 1008 public float getFloat(int id) { 1009 synchronized (mAccessLock) { 1010 TypedValue value = mTmpValue; 1011 if (value == null) { 1012 mTmpValue = value = new TypedValue(); 1013 } 1014 getValue(id, value, true); 1015 if (value.type == TypedValue.TYPE_FLOAT) { 1016 return value.getFloat(); 1017 } 1018 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id) + " type #0x" 1019 + Integer.toHexString(value.type) + " is not valid"); 1020 } 1021 } 1022 1023 /** 1024 * Return an XmlResourceParser through which you can read a view layout 1025 * description for the given resource ID. This parser has limited 1026 * functionality -- in particular, you can't change its input, and only 1027 * the high-level events are available. 1028 * 1029 * <p>This function is really a simple wrapper for calling 1030 * {@link #getXml} with a layout resource. 1031 * 1032 * @param id The desired resource identifier, as generated by the aapt 1033 * tool. This integer encodes the package, type, and resource 1034 * entry. The value 0 is an invalid identifier. 1035 * 1036 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1037 * 1038 * @return A new parser object through which you can read 1039 * the XML data. 1040 * 1041 * @see #getXml 1042 */ 1043 public XmlResourceParser getLayout(int id) throws NotFoundException { 1044 return loadXmlResourceParser(id, "layout"); 1045 } 1046 1047 /** 1048 * Return an XmlResourceParser through which you can read an animation 1049 * description for the given resource ID. This parser has limited 1050 * functionality -- in particular, you can't change its input, and only 1051 * the high-level events are available. 1052 * 1053 * <p>This function is really a simple wrapper for calling 1054 * {@link #getXml} with an animation resource. 1055 * 1056 * @param id The desired resource identifier, as generated by the aapt 1057 * tool. This integer encodes the package, type, and resource 1058 * entry. The value 0 is an invalid identifier. 1059 * 1060 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1061 * 1062 * @return A new parser object through which you can read 1063 * the XML data. 1064 * 1065 * @see #getXml 1066 */ 1067 public XmlResourceParser getAnimation(int id) throws NotFoundException { 1068 return loadXmlResourceParser(id, "anim"); 1069 } 1070 1071 /** 1072 * Return an XmlResourceParser through which you can read a generic XML 1073 * resource for the given resource ID. 1074 * 1075 * <p>The XmlPullParser implementation returned here has some limited 1076 * functionality. In particular, you can't change its input, and only 1077 * high-level parsing events are available (since the document was 1078 * pre-parsed for you at build time, which involved merging text and 1079 * stripping comments). 1080 * 1081 * @param id The desired resource identifier, as generated by the aapt 1082 * tool. This integer encodes the package, type, and resource 1083 * entry. The value 0 is an invalid identifier. 1084 * 1085 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1086 * 1087 * @return A new parser object through which you can read 1088 * the XML data. 1089 * 1090 * @see android.util.AttributeSet 1091 */ 1092 public XmlResourceParser getXml(int id) throws NotFoundException { 1093 return loadXmlResourceParser(id, "xml"); 1094 } 1095 1096 /** 1097 * Open a data stream for reading a raw resource. This can only be used 1098 * with resources whose value is the name of an asset files -- that is, it can be 1099 * used to open drawable, sound, and raw resources; it will fail on string 1100 * and color resources. 1101 * 1102 * @param id The resource identifier to open, as generated by the appt 1103 * tool. 1104 * 1105 * @return InputStream Access to the resource data. 1106 * 1107 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1108 * 1109 */ 1110 public InputStream openRawResource(int id) throws NotFoundException { 1111 TypedValue value; 1112 synchronized (mAccessLock) { 1113 value = mTmpValue; 1114 if (value == null) { 1115 value = new TypedValue(); 1116 } else { 1117 mTmpValue = null; 1118 } 1119 } 1120 InputStream res = openRawResource(id, value); 1121 synchronized (mAccessLock) { 1122 if (mTmpValue == null) { 1123 mTmpValue = value; 1124 } 1125 } 1126 return res; 1127 } 1128 1129 /** 1130 * Open a data stream for reading a raw resource. This can only be used 1131 * with resources whose value is the name of an asset file -- that is, it can be 1132 * used to open drawable, sound, and raw resources; it will fail on string 1133 * and color resources. 1134 * 1135 * @param id The resource identifier to open, as generated by the appt tool. 1136 * @param value The TypedValue object to hold the resource information. 1137 * 1138 * @return InputStream Access to the resource data. 1139 * 1140 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1141 */ 1142 public InputStream openRawResource(int id, TypedValue value) throws NotFoundException { 1143 getValue(id, value, true); 1144 1145 try { 1146 return mAssets.openNonAsset(value.assetCookie, value.string.toString(), 1147 AssetManager.ACCESS_STREAMING); 1148 } catch (Exception e) { 1149 NotFoundException rnf = new NotFoundException("File " + value.string.toString() + 1150 " from drawable resource ID #0x" + Integer.toHexString(id)); 1151 rnf.initCause(e); 1152 throw rnf; 1153 } 1154 } 1155 1156 /** 1157 * Open a file descriptor for reading a raw resource. This can only be used 1158 * with resources whose value is the name of an asset files -- that is, it can be 1159 * used to open drawable, sound, and raw resources; it will fail on string 1160 * and color resources. 1161 * 1162 * <p>This function only works for resources that are stored in the package 1163 * as uncompressed data, which typically includes things like mp3 files 1164 * and png images. 1165 * 1166 * @param id The resource identifier to open, as generated by the appt 1167 * tool. 1168 * 1169 * @return AssetFileDescriptor A new file descriptor you can use to read 1170 * the resource. This includes the file descriptor itself, as well as the 1171 * offset and length of data where the resource appears in the file. A 1172 * null is returned if the file exists but is compressed. 1173 * 1174 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1175 * 1176 */ 1177 public AssetFileDescriptor openRawResourceFd(int id) throws NotFoundException { 1178 TypedValue value; 1179 synchronized (mAccessLock) { 1180 value = mTmpValue; 1181 if (value == null) { 1182 value = new TypedValue(); 1183 } else { 1184 mTmpValue = null; 1185 } 1186 getValue(id, value, true); 1187 } 1188 try { 1189 return mAssets.openNonAssetFd( 1190 value.assetCookie, value.string.toString()); 1191 } catch (Exception e) { 1192 NotFoundException rnf = new NotFoundException( 1193 "File " + value.string.toString() 1194 + " from drawable resource ID #0x" 1195 + Integer.toHexString(id)); 1196 rnf.initCause(e); 1197 throw rnf; 1198 } finally { 1199 synchronized (mAccessLock) { 1200 if (mTmpValue == null) { 1201 mTmpValue = value; 1202 } 1203 } 1204 } 1205 } 1206 1207 /** 1208 * Return the raw data associated with a particular resource ID. 1209 * 1210 * @param id The desired resource identifier, as generated by the aapt 1211 * tool. This integer encodes the package, type, and resource 1212 * entry. The value 0 is an invalid identifier. 1213 * @param outValue Object in which to place the resource data. 1214 * @param resolveRefs If true, a resource that is a reference to another 1215 * resource will be followed so that you receive the 1216 * actual final resource data. If false, the TypedValue 1217 * will be filled in with the reference itself. 1218 * 1219 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1220 * 1221 */ 1222 public void getValue(int id, TypedValue outValue, boolean resolveRefs) 1223 throws NotFoundException { 1224 boolean found = mAssets.getResourceValue(id, 0, outValue, resolveRefs); 1225 if (found) { 1226 return; 1227 } 1228 throw new NotFoundException("Resource ID #0x" 1229 + Integer.toHexString(id)); 1230 } 1231 1232 /** 1233 * Get the raw value associated with a resource with associated density. 1234 * 1235 * @param id resource identifier 1236 * @param density density in DPI 1237 * @param resolveRefs If true, a resource that is a reference to another 1238 * resource will be followed so that you receive the actual final 1239 * resource data. If false, the TypedValue will be filled in with 1240 * the reference itself. 1241 * @throws NotFoundException Throws NotFoundException if the given ID does 1242 * not exist. 1243 * @see #getValue(String, TypedValue, boolean) 1244 */ 1245 public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs) 1246 throws NotFoundException { 1247 boolean found = mAssets.getResourceValue(id, density, outValue, resolveRefs); 1248 if (found) { 1249 return; 1250 } 1251 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)); 1252 } 1253 1254 /** 1255 * Return the raw data associated with a particular resource ID. 1256 * See getIdentifier() for information on how names are mapped to resource 1257 * IDs, and getString(int) for information on how string resources are 1258 * retrieved. 1259 * 1260 * <p>Note: use of this function is discouraged. It is much more 1261 * efficient to retrieve resources by identifier than by name. 1262 * 1263 * @param name The name of the desired resource. This is passed to 1264 * getIdentifier() with a default type of "string". 1265 * @param outValue Object in which to place the resource data. 1266 * @param resolveRefs If true, a resource that is a reference to another 1267 * resource will be followed so that you receive the 1268 * actual final resource data. If false, the TypedValue 1269 * will be filled in with the reference itself. 1270 * 1271 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1272 * 1273 */ 1274 public void getValue(String name, TypedValue outValue, boolean resolveRefs) 1275 throws NotFoundException { 1276 int id = getIdentifier(name, "string", null); 1277 if (id != 0) { 1278 getValue(id, outValue, resolveRefs); 1279 return; 1280 } 1281 throw new NotFoundException("String resource name " + name); 1282 } 1283 1284 /** 1285 * This class holds the current attribute values for a particular theme. 1286 * In other words, a Theme is a set of values for resource attributes; 1287 * these are used in conjunction with {@link TypedArray} 1288 * to resolve the final value for an attribute. 1289 * 1290 * <p>The Theme's attributes come into play in two ways: (1) a styled 1291 * attribute can explicit reference a value in the theme through the 1292 * "?themeAttribute" syntax; (2) if no value has been defined for a 1293 * particular styled attribute, as a last resort we will try to find that 1294 * attribute's value in the Theme. 1295 * 1296 * <p>You will normally use the {@link #obtainStyledAttributes} APIs to 1297 * retrieve XML attributes with style and theme information applied. 1298 */ 1299 public final class Theme { 1300 /** 1301 * Place new attribute values into the theme. The style resource 1302 * specified by <var>resid</var> will be retrieved from this Theme's 1303 * resources, its values placed into the Theme object. 1304 * 1305 * <p>The semantics of this function depends on the <var>force</var> 1306 * argument: If false, only values that are not already defined in 1307 * the theme will be copied from the system resource; otherwise, if 1308 * any of the style's attributes are already defined in the theme, the 1309 * current values in the theme will be overwritten. 1310 * 1311 * @param resId The resource ID of a style resource from which to 1312 * obtain attribute values. 1313 * @param force If true, values in the style resource will always be 1314 * used in the theme; otherwise, they will only be used 1315 * if not already defined in the theme. 1316 */ 1317 public void applyStyle(int resId, boolean force) { 1318 AssetManager.applyThemeStyle(mTheme, resId, force); 1319 1320 mThemeResId = resId; 1321 mKey += Integer.toHexString(resId) + (force ? "! " : " "); 1322 } 1323 1324 /** 1325 * Set this theme to hold the same contents as the theme 1326 * <var>other</var>. If both of these themes are from the same 1327 * Resources object, they will be identical after this function 1328 * returns. If they are from different Resources, only the resources 1329 * they have in common will be set in this theme. 1330 * 1331 * @param other The existing Theme to copy from. 1332 */ 1333 public void setTo(Theme other) { 1334 AssetManager.copyTheme(mTheme, other.mTheme); 1335 1336 mThemeResId = other.mThemeResId; 1337 mKey = other.mKey; 1338 } 1339 1340 /** 1341 * Return a TypedArray holding the values defined by 1342 * <var>Theme</var> which are listed in <var>attrs</var>. 1343 * 1344 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1345 * with the array. 1346 * 1347 * @param attrs The desired attributes. 1348 * 1349 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1350 * 1351 * @return Returns a TypedArray holding an array of the attribute values. 1352 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1353 * when done with it. 1354 * 1355 * @see Resources#obtainAttributes 1356 * @see #obtainStyledAttributes(int, int[]) 1357 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1358 */ 1359 public TypedArray obtainStyledAttributes(int[] attrs) { 1360 final int len = attrs.length; 1361 final TypedArray array = TypedArray.obtain(Resources.this, len); 1362 array.mTheme = this; 1363 AssetManager.applyStyle(mTheme, 0, 0, 0, attrs, array.mData, array.mIndices); 1364 return array; 1365 } 1366 1367 /** 1368 * Return a TypedArray holding the values defined by the style 1369 * resource <var>resid</var> which are listed in <var>attrs</var>. 1370 * 1371 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1372 * with the array. 1373 * 1374 * @param resid The desired style resource. 1375 * @param attrs The desired attributes in the style. 1376 * 1377 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1378 * 1379 * @return Returns a TypedArray holding an array of the attribute values. 1380 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1381 * when done with it. 1382 * 1383 * @see Resources#obtainAttributes 1384 * @see #obtainStyledAttributes(int[]) 1385 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1386 */ 1387 public TypedArray obtainStyledAttributes(int resid, int[] attrs) throws NotFoundException { 1388 final int len = attrs.length; 1389 final TypedArray array = TypedArray.obtain(Resources.this, len); 1390 array.mTheme = this; 1391 if (false) { 1392 int[] data = array.mData; 1393 1394 System.out.println("**********************************************************"); 1395 System.out.println("**********************************************************"); 1396 System.out.println("**********************************************************"); 1397 System.out.println("Attributes:"); 1398 String s = " Attrs:"; 1399 int i; 1400 for (i=0; i<attrs.length; i++) { 1401 s = s + " 0x" + Integer.toHexString(attrs[i]); 1402 } 1403 System.out.println(s); 1404 s = " Found:"; 1405 TypedValue value = new TypedValue(); 1406 for (i=0; i<attrs.length; i++) { 1407 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1408 value.type = data[d+AssetManager.STYLE_TYPE]; 1409 value.data = data[d+AssetManager.STYLE_DATA]; 1410 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1411 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1412 s = s + " 0x" + Integer.toHexString(attrs[i]) 1413 + "=" + value; 1414 } 1415 System.out.println(s); 1416 } 1417 AssetManager.applyStyle(mTheme, 0, resid, 0, attrs, array.mData, array.mIndices); 1418 return array; 1419 } 1420 1421 /** 1422 * Return a TypedArray holding the attribute values in 1423 * <var>set</var> 1424 * that are listed in <var>attrs</var>. In addition, if the given 1425 * AttributeSet specifies a style class (through the "style" attribute), 1426 * that style will be applied on top of the base attributes it defines. 1427 * 1428 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1429 * with the array. 1430 * 1431 * <p>When determining the final value of a particular attribute, there 1432 * are four inputs that come into play:</p> 1433 * 1434 * <ol> 1435 * <li> Any attribute values in the given AttributeSet. 1436 * <li> The style resource specified in the AttributeSet (named 1437 * "style"). 1438 * <li> The default style specified by <var>defStyleAttr</var> and 1439 * <var>defStyleRes</var> 1440 * <li> The base values in this theme. 1441 * </ol> 1442 * 1443 * <p>Each of these inputs is considered in-order, with the first listed 1444 * taking precedence over the following ones. In other words, if in the 1445 * AttributeSet you have supplied <code><Button 1446 * textColor="#ff000000"></code>, then the button's text will 1447 * <em>always</em> be black, regardless of what is specified in any of 1448 * the styles. 1449 * 1450 * @param set The base set of attribute values. May be null. 1451 * @param attrs The desired attributes to be retrieved. 1452 * @param defStyleAttr An attribute in the current theme that contains a 1453 * reference to a style resource that supplies 1454 * defaults values for the TypedArray. Can be 1455 * 0 to not look for defaults. 1456 * @param defStyleRes A resource identifier of a style resource that 1457 * supplies default values for the TypedArray, 1458 * used only if defStyleAttr is 0 or can not be found 1459 * in the theme. Can be 0 to not look for defaults. 1460 * 1461 * @return Returns a TypedArray holding an array of the attribute values. 1462 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1463 * when done with it. 1464 * 1465 * @see Resources#obtainAttributes 1466 * @see #obtainStyledAttributes(int[]) 1467 * @see #obtainStyledAttributes(int, int[]) 1468 */ 1469 public TypedArray obtainStyledAttributes(AttributeSet set, 1470 int[] attrs, int defStyleAttr, int defStyleRes) { 1471 final int len = attrs.length; 1472 final TypedArray array = TypedArray.obtain(Resources.this, len); 1473 1474 // XXX note that for now we only work with compiled XML files. 1475 // To support generic XML files we will need to manually parse 1476 // out the attributes from the XML file (applying type information 1477 // contained in the resources and such). 1478 final XmlBlock.Parser parser = (XmlBlock.Parser)set; 1479 AssetManager.applyStyle(mTheme, defStyleAttr, defStyleRes, 1480 parser != null ? parser.mParseState : 0, attrs, array.mData, array.mIndices); 1481 1482 array.mTheme = this; 1483 array.mXml = parser; 1484 1485 if (false) { 1486 int[] data = array.mData; 1487 1488 System.out.println("Attributes:"); 1489 String s = " Attrs:"; 1490 int i; 1491 for (i=0; i<set.getAttributeCount(); i++) { 1492 s = s + " " + set.getAttributeName(i); 1493 int id = set.getAttributeNameResource(i); 1494 if (id != 0) { 1495 s = s + "(0x" + Integer.toHexString(id) + ")"; 1496 } 1497 s = s + "=" + set.getAttributeValue(i); 1498 } 1499 System.out.println(s); 1500 s = " Found:"; 1501 TypedValue value = new TypedValue(); 1502 for (i=0; i<attrs.length; i++) { 1503 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1504 value.type = data[d+AssetManager.STYLE_TYPE]; 1505 value.data = data[d+AssetManager.STYLE_DATA]; 1506 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1507 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1508 s = s + " 0x" + Integer.toHexString(attrs[i]) 1509 + "=" + value; 1510 } 1511 System.out.println(s); 1512 } 1513 1514 return array; 1515 } 1516 1517 /** 1518 * Retrieve the values for a set of attributes in the Theme. The 1519 * contents of the typed array are ultimately filled in by 1520 * {@link Resources#getValue}. 1521 * 1522 * @param values The base set of attribute values, must be equal 1523 * in length to {@code attrs} or {@code null}. All values 1524 * must be of type {@link TypedValue#TYPE_ATTRIBUTE}. 1525 * @param attrs The desired attributes to be retrieved. 1526 * @return Returns a TypedArray holding an array of the attribute 1527 * values. Be sure to call {@link TypedArray#recycle()} 1528 * when done with it. 1529 * @hide 1530 */ 1531 public TypedArray resolveAttributes(int[] values, int[] attrs) { 1532 final int len = attrs.length; 1533 if (values != null && len != values.length) { 1534 throw new IllegalArgumentException( 1535 "Base attribute values must be null or the same length as attrs"); 1536 } 1537 1538 final TypedArray array = TypedArray.obtain(Resources.this, len); 1539 AssetManager.resolveAttrs(mTheme, 0, 0, values, attrs, array.mData, array.mIndices); 1540 array.mTheme = this; 1541 array.mXml = null; 1542 1543 return array; 1544 } 1545 1546 /** 1547 * Retrieve the value of an attribute in the Theme. The contents of 1548 * <var>outValue</var> are ultimately filled in by 1549 * {@link Resources#getValue}. 1550 * 1551 * @param resid The resource identifier of the desired theme 1552 * attribute. 1553 * @param outValue Filled in with the ultimate resource value supplied 1554 * by the attribute. 1555 * @param resolveRefs If true, resource references will be walked; if 1556 * false, <var>outValue</var> may be a 1557 * TYPE_REFERENCE. In either case, it will never 1558 * be a TYPE_ATTRIBUTE. 1559 * 1560 * @return boolean Returns true if the attribute was found and 1561 * <var>outValue</var> is valid, else false. 1562 */ 1563 public boolean resolveAttribute(int resid, TypedValue outValue, boolean resolveRefs) { 1564 boolean got = mAssets.getThemeValue(mTheme, resid, outValue, resolveRefs); 1565 if (false) { 1566 System.out.println( 1567 "resolveAttribute #" + Integer.toHexString(resid) 1568 + " got=" + got + ", type=0x" + Integer.toHexString(outValue.type) 1569 + ", data=0x" + Integer.toHexString(outValue.data)); 1570 } 1571 return got; 1572 } 1573 1574 /** 1575 * Returns the resources to which this theme belongs. 1576 * 1577 * @return Resources to which this theme belongs. 1578 */ 1579 public Resources getResources() { 1580 return Resources.this; 1581 } 1582 1583 /** 1584 * Return a drawable object associated with a particular resource ID 1585 * and styled for the Theme. 1586 * 1587 * @param id The desired resource identifier, as generated by the aapt 1588 * tool. This integer encodes the package, type, and resource 1589 * entry. The value 0 is an invalid identifier. 1590 * @return Drawable An object that can be used to draw this resource. 1591 * @throws NotFoundException Throws NotFoundException if the given ID 1592 * does not exist. 1593 */ 1594 public Drawable getDrawable(int id) throws NotFoundException { 1595 return Resources.this.getDrawable(id, this); 1596 } 1597 1598 /** 1599 * Print contents of this theme out to the log. For debugging only. 1600 * 1601 * @param priority The log priority to use. 1602 * @param tag The log tag to use. 1603 * @param prefix Text to prefix each line printed. 1604 */ 1605 public void dump(int priority, String tag, String prefix) { 1606 AssetManager.dumpTheme(mTheme, priority, tag, prefix); 1607 } 1608 1609 @Override 1610 protected void finalize() throws Throwable { 1611 super.finalize(); 1612 mAssets.releaseTheme(mTheme); 1613 } 1614 1615 /*package*/ Theme() { 1616 mAssets = Resources.this.mAssets; 1617 mTheme = mAssets.createTheme(); 1618 } 1619 1620 @SuppressWarnings("hiding") 1621 private final AssetManager mAssets; 1622 private final long mTheme; 1623 1624 /** Resource identifier for the theme. */ 1625 private int mThemeResId = 0; 1626 1627 /** Unique key for the series of styles applied to this theme. */ 1628 private String mKey = ""; 1629 1630 // Needed by layoutlib. 1631 /*package*/ long getNativeTheme() { 1632 return mTheme; 1633 } 1634 1635 /*package*/ int getAppliedStyleResId() { 1636 return mThemeResId; 1637 } 1638 1639 /*package*/ String getKey() { 1640 return mKey; 1641 } 1642 1643 private String getResourceNameFromHexString(String hexString) { 1644 return getResourceName(Integer.parseInt(hexString, 16)); 1645 } 1646 1647 /** 1648 * Parses {@link #mKey} and returns a String array that holds pairs of adjacent Theme data: 1649 * resource name followed by whether or not it was forced, as specified by 1650 * {@link #applyStyle(int, boolean)}. 1651 * 1652 * @hide 1653 */ 1654 @ViewDebug.ExportedProperty(category = "theme", hasAdjacentMapping = true) 1655 public String[] getTheme() { 1656 String[] themeData = mKey.split(" "); 1657 String[] themes = new String[themeData.length * 2]; 1658 String theme; 1659 boolean forced; 1660 1661 for (int i = 0, j = themeData.length - 1; i < themes.length; i += 2, --j) { 1662 theme = themeData[j]; 1663 forced = theme.endsWith("!"); 1664 themes[i] = forced ? 1665 getResourceNameFromHexString(theme.substring(0, theme.length() - 1)) : 1666 getResourceNameFromHexString(theme); 1667 themes[i + 1] = forced ? "forced" : "not forced"; 1668 } 1669 return themes; 1670 } 1671 } 1672 1673 /** 1674 * Generate a new Theme object for this set of Resources. It initially 1675 * starts out empty. 1676 * 1677 * @return Theme The newly created Theme container. 1678 */ 1679 public final Theme newTheme() { 1680 return new Theme(); 1681 } 1682 1683 /** 1684 * Retrieve a set of basic attribute values from an AttributeSet, not 1685 * performing styling of them using a theme and/or style resources. 1686 * 1687 * @param set The current attribute values to retrieve. 1688 * @param attrs The specific attributes to be retrieved. 1689 * @return Returns a TypedArray holding an array of the attribute values. 1690 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1691 * when done with it. 1692 * 1693 * @see Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 1694 */ 1695 public TypedArray obtainAttributes(AttributeSet set, int[] attrs) { 1696 int len = attrs.length; 1697 TypedArray array = TypedArray.obtain(this, len); 1698 1699 // XXX note that for now we only work with compiled XML files. 1700 // To support generic XML files we will need to manually parse 1701 // out the attributes from the XML file (applying type information 1702 // contained in the resources and such). 1703 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1704 mAssets.retrieveAttributes(parser.mParseState, attrs, 1705 array.mData, array.mIndices); 1706 1707 array.mXml = parser; 1708 1709 return array; 1710 } 1711 1712 /** 1713 * Store the newly updated configuration. 1714 */ 1715 public void updateConfiguration(Configuration config, 1716 DisplayMetrics metrics) { 1717 updateConfiguration(config, metrics, null); 1718 } 1719 1720 /** 1721 * @hide 1722 */ 1723 public void updateConfiguration(Configuration config, 1724 DisplayMetrics metrics, CompatibilityInfo compat) { 1725 synchronized (mAccessLock) { 1726 if (false) { 1727 Slog.i(TAG, "**** Updating config of " + this + ": old config is " 1728 + mConfiguration + " old compat is " + mCompatibilityInfo); 1729 Slog.i(TAG, "**** Updating config of " + this + ": new config is " 1730 + config + " new compat is " + compat); 1731 } 1732 if (compat != null) { 1733 mCompatibilityInfo = compat; 1734 } 1735 if (metrics != null) { 1736 mMetrics.setTo(metrics); 1737 } 1738 // NOTE: We should re-arrange this code to create a Display 1739 // with the CompatibilityInfo that is used everywhere we deal 1740 // with the display in relation to this app, rather than 1741 // doing the conversion here. This impl should be okay because 1742 // we make sure to return a compatible display in the places 1743 // where there are public APIs to retrieve the display... but 1744 // it would be cleaner and more maintainble to just be 1745 // consistently dealing with a compatible display everywhere in 1746 // the framework. 1747 mCompatibilityInfo.applyToDisplayMetrics(mMetrics); 1748 1749 int configChanges = 0xfffffff; 1750 if (config != null) { 1751 mTmpConfig.setTo(config); 1752 int density = config.densityDpi; 1753 if (density == Configuration.DENSITY_DPI_UNDEFINED) { 1754 density = mMetrics.noncompatDensityDpi; 1755 } 1756 1757 mCompatibilityInfo.applyToConfiguration(density, mTmpConfig); 1758 1759 if (mTmpConfig.locale == null) { 1760 mTmpConfig.locale = Locale.getDefault(); 1761 mTmpConfig.setLayoutDirection(mTmpConfig.locale); 1762 } 1763 configChanges = mConfiguration.updateFrom(mTmpConfig); 1764 configChanges = ActivityInfo.activityInfoConfigToNative(configChanges); 1765 } 1766 if (mConfiguration.locale == null) { 1767 mConfiguration.locale = Locale.getDefault(); 1768 mConfiguration.setLayoutDirection(mConfiguration.locale); 1769 } 1770 if (mConfiguration.densityDpi != Configuration.DENSITY_DPI_UNDEFINED) { 1771 mMetrics.densityDpi = mConfiguration.densityDpi; 1772 mMetrics.density = mConfiguration.densityDpi * DisplayMetrics.DENSITY_DEFAULT_SCALE; 1773 } 1774 mMetrics.scaledDensity = mMetrics.density * mConfiguration.fontScale; 1775 1776 String locale = null; 1777 if (mConfiguration.locale != null) { 1778 locale = adjustLanguageTag(mConfiguration.locale.toLanguageTag()); 1779 } 1780 int width, height; 1781 if (mMetrics.widthPixels >= mMetrics.heightPixels) { 1782 width = mMetrics.widthPixels; 1783 height = mMetrics.heightPixels; 1784 } else { 1785 //noinspection SuspiciousNameCombination 1786 width = mMetrics.heightPixels; 1787 //noinspection SuspiciousNameCombination 1788 height = mMetrics.widthPixels; 1789 } 1790 int keyboardHidden = mConfiguration.keyboardHidden; 1791 if (keyboardHidden == Configuration.KEYBOARDHIDDEN_NO 1792 && mConfiguration.hardKeyboardHidden 1793 == Configuration.HARDKEYBOARDHIDDEN_YES) { 1794 keyboardHidden = Configuration.KEYBOARDHIDDEN_SOFT; 1795 } 1796 mAssets.setConfiguration(mConfiguration.mcc, mConfiguration.mnc, 1797 locale, mConfiguration.orientation, 1798 mConfiguration.touchscreen, 1799 mConfiguration.densityDpi, mConfiguration.keyboard, 1800 keyboardHidden, mConfiguration.navigation, width, height, 1801 mConfiguration.smallestScreenWidthDp, 1802 mConfiguration.screenWidthDp, mConfiguration.screenHeightDp, 1803 mConfiguration.screenLayout, mConfiguration.uiMode, 1804 Build.VERSION.RESOURCES_SDK_INT); 1805 1806 if (DEBUG_CONFIG) { 1807 Slog.i(TAG, "**** Updating config of " + this + ": final config is " + mConfiguration 1808 + " final compat is " + mCompatibilityInfo); 1809 } 1810 1811 clearDrawableCachesLocked(mDrawableCache, configChanges); 1812 clearDrawableCachesLocked(mColorDrawableCache, configChanges); 1813 1814 mColorStateListCache.clear(); 1815 1816 flushLayoutCache(); 1817 } 1818 synchronized (sSync) { 1819 if (mPluralRule != null) { 1820 mPluralRule = NativePluralRules.forLocale(config.locale); 1821 } 1822 } 1823 } 1824 1825 private void clearDrawableCachesLocked( 1826 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 1827 int configChanges) { 1828 final int N = caches.size(); 1829 for (int i = 0; i < N; i++) { 1830 clearDrawableCacheLocked(caches.valueAt(i), configChanges); 1831 } 1832 } 1833 1834 private void clearDrawableCacheLocked( 1835 LongSparseArray<WeakReference<ConstantState>> cache, int configChanges) { 1836 if (DEBUG_CONFIG) { 1837 Log.d(TAG, "Cleaning up drawables config changes: 0x" 1838 + Integer.toHexString(configChanges)); 1839 } 1840 final int N = cache.size(); 1841 for (int i = 0; i < N; i++) { 1842 final WeakReference<ConstantState> ref = cache.valueAt(i); 1843 if (ref != null) { 1844 final ConstantState cs = ref.get(); 1845 if (cs != null) { 1846 if (Configuration.needNewResources( 1847 configChanges, cs.getChangingConfigurations())) { 1848 if (DEBUG_CONFIG) { 1849 Log.d(TAG, "FLUSHING #0x" 1850 + Long.toHexString(cache.keyAt(i)) 1851 + " / " + cs + " with changes: 0x" 1852 + Integer.toHexString(cs.getChangingConfigurations())); 1853 } 1854 cache.setValueAt(i, null); 1855 } else if (DEBUG_CONFIG) { 1856 Log.d(TAG, "(Keeping #0x" 1857 + Long.toHexString(cache.keyAt(i)) 1858 + " / " + cs + " with changes: 0x" 1859 + Integer.toHexString(cs.getChangingConfigurations()) 1860 + ")"); 1861 } 1862 } 1863 } 1864 } 1865 } 1866 1867 /** 1868 * {@code Locale.toLanguageTag} will transform the obsolete (and deprecated) 1869 * language codes "in", "ji" and "iw" to "id", "yi" and "he" respectively. 1870 * 1871 * All released versions of android prior to "L" used the deprecated language 1872 * tags, so we will need to support them for backwards compatibility. 1873 * 1874 * Note that this conversion needs to take place *after* the call to 1875 * {@code toLanguageTag} because that will convert all the deprecated codes to 1876 * the new ones, even if they're set manually. 1877 */ 1878 private static String adjustLanguageTag(String languageTag) { 1879 final int separator = languageTag.indexOf('-'); 1880 final String language; 1881 final String remainder; 1882 1883 if (separator == -1) { 1884 language = languageTag; 1885 remainder = ""; 1886 } else { 1887 language = languageTag.substring(0, separator); 1888 remainder = languageTag.substring(separator); 1889 } 1890 1891 return Locale.adjustLanguageCode(language) + remainder; 1892 } 1893 1894 /** 1895 * Update the system resources configuration if they have previously 1896 * been initialized. 1897 * 1898 * @hide 1899 */ 1900 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics, 1901 CompatibilityInfo compat) { 1902 if (mSystem != null) { 1903 mSystem.updateConfiguration(config, metrics, compat); 1904 //Log.i(TAG, "Updated system resources " + mSystem 1905 // + ": " + mSystem.getConfiguration()); 1906 } 1907 } 1908 1909 /** 1910 * Return the current display metrics that are in effect for this resource 1911 * object. The returned object should be treated as read-only. 1912 * 1913 * @return The resource's current display metrics. 1914 */ 1915 public DisplayMetrics getDisplayMetrics() { 1916 if (DEBUG_CONFIG) Slog.v(TAG, "Returning DisplayMetrics: " + mMetrics.widthPixels 1917 + "x" + mMetrics.heightPixels + " " + mMetrics.density); 1918 return mMetrics; 1919 } 1920 1921 /** 1922 * Return the current configuration that is in effect for this resource 1923 * object. The returned object should be treated as read-only. 1924 * 1925 * @return The resource's current configuration. 1926 */ 1927 public Configuration getConfiguration() { 1928 return mConfiguration; 1929 } 1930 1931 /** 1932 * Return the compatibility mode information for the application. 1933 * The returned object should be treated as read-only. 1934 * 1935 * @return compatibility info. 1936 * @hide 1937 */ 1938 public CompatibilityInfo getCompatibilityInfo() { 1939 return mCompatibilityInfo; 1940 } 1941 1942 /** 1943 * This is just for testing. 1944 * @hide 1945 */ 1946 public void setCompatibilityInfo(CompatibilityInfo ci) { 1947 if (ci != null) { 1948 mCompatibilityInfo = ci; 1949 updateConfiguration(mConfiguration, mMetrics); 1950 } 1951 } 1952 1953 /** 1954 * Return a resource identifier for the given resource name. A fully 1955 * qualified resource name is of the form "package:type/entry". The first 1956 * two components (package and type) are optional if defType and 1957 * defPackage, respectively, are specified here. 1958 * 1959 * <p>Note: use of this function is discouraged. It is much more 1960 * efficient to retrieve resources by identifier than by name. 1961 * 1962 * @param name The name of the desired resource. 1963 * @param defType Optional default resource type to find, if "type/" is 1964 * not included in the name. Can be null to require an 1965 * explicit type. 1966 * @param defPackage Optional default package to find, if "package:" is 1967 * not included in the name. Can be null to require an 1968 * explicit package. 1969 * 1970 * @return int The associated resource identifier. Returns 0 if no such 1971 * resource was found. (0 is not a valid resource ID.) 1972 */ 1973 public int getIdentifier(String name, String defType, String defPackage) { 1974 if (name == null) { 1975 throw new NullPointerException("name is null"); 1976 } 1977 try { 1978 return Integer.parseInt(name); 1979 } catch (Exception e) { 1980 // Ignore 1981 } 1982 return mAssets.getResourceIdentifier(name, defType, defPackage); 1983 } 1984 1985 /** 1986 * Return true if given resource identifier includes a package. 1987 * 1988 * @hide 1989 */ 1990 public static boolean resourceHasPackage(int resid) { 1991 return (resid >>> 24) != 0; 1992 } 1993 1994 /** 1995 * Return the full name for a given resource identifier. This name is 1996 * a single string of the form "package:type/entry". 1997 * 1998 * @param resid The resource identifier whose name is to be retrieved. 1999 * 2000 * @return A string holding the name of the resource. 2001 * 2002 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2003 * 2004 * @see #getResourcePackageName 2005 * @see #getResourceTypeName 2006 * @see #getResourceEntryName 2007 */ 2008 public String getResourceName(int resid) throws NotFoundException { 2009 String str = mAssets.getResourceName(resid); 2010 if (str != null) return str; 2011 throw new NotFoundException("Unable to find resource ID #0x" 2012 + Integer.toHexString(resid)); 2013 } 2014 2015 /** 2016 * Return the package name for a given resource identifier. 2017 * 2018 * @param resid The resource identifier whose package name is to be 2019 * retrieved. 2020 * 2021 * @return A string holding the package name of the resource. 2022 * 2023 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2024 * 2025 * @see #getResourceName 2026 */ 2027 public String getResourcePackageName(int resid) throws NotFoundException { 2028 String str = mAssets.getResourcePackageName(resid); 2029 if (str != null) return str; 2030 throw new NotFoundException("Unable to find resource ID #0x" 2031 + Integer.toHexString(resid)); 2032 } 2033 2034 /** 2035 * Return the type name for a given resource identifier. 2036 * 2037 * @param resid The resource identifier whose type name is to be 2038 * retrieved. 2039 * 2040 * @return A string holding the type name of the resource. 2041 * 2042 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2043 * 2044 * @see #getResourceName 2045 */ 2046 public String getResourceTypeName(int resid) throws NotFoundException { 2047 String str = mAssets.getResourceTypeName(resid); 2048 if (str != null) return str; 2049 throw new NotFoundException("Unable to find resource ID #0x" 2050 + Integer.toHexString(resid)); 2051 } 2052 2053 /** 2054 * Return the entry name for a given resource identifier. 2055 * 2056 * @param resid The resource identifier whose entry name is to be 2057 * retrieved. 2058 * 2059 * @return A string holding the entry name of the resource. 2060 * 2061 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2062 * 2063 * @see #getResourceName 2064 */ 2065 public String getResourceEntryName(int resid) throws NotFoundException { 2066 String str = mAssets.getResourceEntryName(resid); 2067 if (str != null) return str; 2068 throw new NotFoundException("Unable to find resource ID #0x" 2069 + Integer.toHexString(resid)); 2070 } 2071 2072 /** 2073 * Parse a series of {@link android.R.styleable#Extra <extra>} tags from 2074 * an XML file. You call this when you are at the parent tag of the 2075 * extra tags, and it will return once all of the child tags have been parsed. 2076 * This will call {@link #parseBundleExtra} for each extra tag encountered. 2077 * 2078 * @param parser The parser from which to retrieve the extras. 2079 * @param outBundle A Bundle in which to place all parsed extras. 2080 * @throws XmlPullParserException 2081 * @throws IOException 2082 */ 2083 public void parseBundleExtras(XmlResourceParser parser, Bundle outBundle) 2084 throws XmlPullParserException, IOException { 2085 int outerDepth = parser.getDepth(); 2086 int type; 2087 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 2088 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 2089 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 2090 continue; 2091 } 2092 2093 String nodeName = parser.getName(); 2094 if (nodeName.equals("extra")) { 2095 parseBundleExtra("extra", parser, outBundle); 2096 XmlUtils.skipCurrentTag(parser); 2097 2098 } else { 2099 XmlUtils.skipCurrentTag(parser); 2100 } 2101 } 2102 } 2103 2104 /** 2105 * Parse a name/value pair out of an XML tag holding that data. The 2106 * AttributeSet must be holding the data defined by 2107 * {@link android.R.styleable#Extra}. The following value types are supported: 2108 * <ul> 2109 * <li> {@link TypedValue#TYPE_STRING}: 2110 * {@link Bundle#putCharSequence Bundle.putCharSequence()} 2111 * <li> {@link TypedValue#TYPE_INT_BOOLEAN}: 2112 * {@link Bundle#putCharSequence Bundle.putBoolean()} 2113 * <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}: 2114 * {@link Bundle#putCharSequence Bundle.putBoolean()} 2115 * <li> {@link TypedValue#TYPE_FLOAT}: 2116 * {@link Bundle#putCharSequence Bundle.putFloat()} 2117 * </ul> 2118 * 2119 * @param tagName The name of the tag these attributes come from; this is 2120 * only used for reporting error messages. 2121 * @param attrs The attributes from which to retrieve the name/value pair. 2122 * @param outBundle The Bundle in which to place the parsed value. 2123 * @throws XmlPullParserException If the attributes are not valid. 2124 */ 2125 public void parseBundleExtra(String tagName, AttributeSet attrs, 2126 Bundle outBundle) throws XmlPullParserException { 2127 TypedArray sa = obtainAttributes(attrs, 2128 com.android.internal.R.styleable.Extra); 2129 2130 String name = sa.getString( 2131 com.android.internal.R.styleable.Extra_name); 2132 if (name == null) { 2133 sa.recycle(); 2134 throw new XmlPullParserException("<" + tagName 2135 + "> requires an android:name attribute at " 2136 + attrs.getPositionDescription()); 2137 } 2138 2139 TypedValue v = sa.peekValue( 2140 com.android.internal.R.styleable.Extra_value); 2141 if (v != null) { 2142 if (v.type == TypedValue.TYPE_STRING) { 2143 CharSequence cs = v.coerceToString(); 2144 outBundle.putCharSequence(name, cs); 2145 } else if (v.type == TypedValue.TYPE_INT_BOOLEAN) { 2146 outBundle.putBoolean(name, v.data != 0); 2147 } else if (v.type >= TypedValue.TYPE_FIRST_INT 2148 && v.type <= TypedValue.TYPE_LAST_INT) { 2149 outBundle.putInt(name, v.data); 2150 } else if (v.type == TypedValue.TYPE_FLOAT) { 2151 outBundle.putFloat(name, v.getFloat()); 2152 } else { 2153 sa.recycle(); 2154 throw new XmlPullParserException("<" + tagName 2155 + "> only supports string, integer, float, color, and boolean at " 2156 + attrs.getPositionDescription()); 2157 } 2158 } else { 2159 sa.recycle(); 2160 throw new XmlPullParserException("<" + tagName 2161 + "> requires an android:value or android:resource attribute at " 2162 + attrs.getPositionDescription()); 2163 } 2164 2165 sa.recycle(); 2166 } 2167 2168 /** 2169 * Retrieve underlying AssetManager storage for these resources. 2170 */ 2171 public final AssetManager getAssets() { 2172 return mAssets; 2173 } 2174 2175 /** 2176 * Call this to remove all cached loaded layout resources from the 2177 * Resources object. Only intended for use with performance testing 2178 * tools. 2179 */ 2180 public final void flushLayoutCache() { 2181 synchronized (mCachedXmlBlockIds) { 2182 // First see if this block is in our cache. 2183 final int num = mCachedXmlBlockIds.length; 2184 for (int i=0; i<num; i++) { 2185 mCachedXmlBlockIds[i] = -0; 2186 XmlBlock oldBlock = mCachedXmlBlocks[i]; 2187 if (oldBlock != null) { 2188 oldBlock.close(); 2189 } 2190 mCachedXmlBlocks[i] = null; 2191 } 2192 } 2193 } 2194 2195 /** 2196 * Start preloading of resource data using this Resources object. Only 2197 * for use by the zygote process for loading common system resources. 2198 * {@hide} 2199 */ 2200 public final void startPreloading() { 2201 synchronized (sSync) { 2202 if (sPreloaded) { 2203 throw new IllegalStateException("Resources already preloaded"); 2204 } 2205 sPreloaded = true; 2206 mPreloading = true; 2207 sPreloadedDensity = DisplayMetrics.DENSITY_DEVICE; 2208 mConfiguration.densityDpi = sPreloadedDensity; 2209 updateConfiguration(null, null); 2210 } 2211 } 2212 2213 /** 2214 * Called by zygote when it is done preloading resources, to change back 2215 * to normal Resources operation. 2216 */ 2217 public final void finishPreloading() { 2218 if (mPreloading) { 2219 mPreloading = false; 2220 flushLayoutCache(); 2221 } 2222 } 2223 2224 /** 2225 * @hide 2226 */ 2227 public LongSparseArray<ConstantState> getPreloadedDrawables() { 2228 return sPreloadedDrawables[0]; 2229 } 2230 2231 private boolean verifyPreloadConfig(int changingConfigurations, int allowVarying, 2232 int resourceId, String name) { 2233 // We allow preloading of resources even if they vary by font scale (which 2234 // doesn't impact resource selection) or density (which we handle specially by 2235 // simply turning off all preloading), as well as any other configs specified 2236 // by the caller. 2237 if (((changingConfigurations&~(ActivityInfo.CONFIG_FONT_SCALE | 2238 ActivityInfo.CONFIG_DENSITY)) & ~allowVarying) != 0) { 2239 String resName; 2240 try { 2241 resName = getResourceName(resourceId); 2242 } catch (NotFoundException e) { 2243 resName = "?"; 2244 } 2245 // This should never happen in production, so we should log a 2246 // warning even if we're not debugging. 2247 Log.w(TAG, "Preloaded " + name + " resource #0x" 2248 + Integer.toHexString(resourceId) 2249 + " (" + resName + ") that varies with configuration!!"); 2250 return false; 2251 } 2252 if (TRACE_FOR_PRELOAD) { 2253 String resName; 2254 try { 2255 resName = getResourceName(resourceId); 2256 } catch (NotFoundException e) { 2257 resName = "?"; 2258 } 2259 Log.w(TAG, "Preloading " + name + " resource #0x" 2260 + Integer.toHexString(resourceId) 2261 + " (" + resName + ")"); 2262 } 2263 return true; 2264 } 2265 2266 /*package*/ Drawable loadDrawable(TypedValue value, int id, Theme theme) throws NotFoundException { 2267 if (TRACE_FOR_PRELOAD) { 2268 // Log only framework resources 2269 if ((id >>> 24) == 0x1) { 2270 final String name = getResourceName(id); 2271 if (name != null) { 2272 Log.d("PreloadDrawable", name); 2273 } 2274 } 2275 } 2276 2277 final boolean isColorDrawable; 2278 final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches; 2279 final long key; 2280 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT 2281 && value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2282 isColorDrawable = true; 2283 caches = mColorDrawableCache; 2284 key = value.data; 2285 } else { 2286 isColorDrawable = false; 2287 caches = mDrawableCache; 2288 key = (((long) value.assetCookie) << 32) | value.data; 2289 } 2290 2291 // First, check whether we have a cached version of this drawable 2292 // that was inflated against the specified theme. 2293 if (!mPreloading) { 2294 final Drawable cachedDrawable = getCachedDrawable(caches, key, theme); 2295 if (cachedDrawable != null) { 2296 return cachedDrawable; 2297 } 2298 } 2299 2300 // Next, check preloaded drawables. These are unthemed but may have 2301 // themeable attributes. 2302 final ConstantState cs; 2303 if (isColorDrawable) { 2304 cs = sPreloadedColorDrawables.get(key); 2305 } else { 2306 cs = sPreloadedDrawables[mConfiguration.getLayoutDirection()].get(key); 2307 } 2308 2309 final Drawable dr; 2310 if (cs != null) { 2311 dr = cs.newDrawable(this, theme); 2312 } else if (isColorDrawable) { 2313 dr = new ColorDrawable(value.data); 2314 } else { 2315 dr = loadDrawableForCookie(value, id, theme); 2316 } 2317 2318 // If we were able to obtain a drawable, store it in the appropriate 2319 // cache (either preload or themed). 2320 if (dr != null) { 2321 dr.setChangingConfigurations(value.changingConfigurations); 2322 cacheDrawable(value, theme, isColorDrawable, caches, key, dr); 2323 } 2324 2325 return dr; 2326 } 2327 2328 private void cacheDrawable(TypedValue value, Theme theme, boolean isColorDrawable, 2329 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 2330 long key, Drawable dr) { 2331 final ConstantState cs = dr.getConstantState(); 2332 if (cs == null) { 2333 return; 2334 } 2335 2336 if (mPreloading) { 2337 // Preloaded drawables never have a theme, but may be themeable. 2338 final int changingConfigs = cs.getChangingConfigurations(); 2339 if (isColorDrawable) { 2340 if (verifyPreloadConfig(changingConfigs, 0, value.resourceId, "drawable")) { 2341 sPreloadedColorDrawables.put(key, cs); 2342 } 2343 } else { 2344 if (verifyPreloadConfig( 2345 changingConfigs, LAYOUT_DIR_CONFIG, value.resourceId, "drawable")) { 2346 if ((changingConfigs & LAYOUT_DIR_CONFIG) == 0) { 2347 // If this resource does not vary based on layout direction, 2348 // we can put it in all of the preload maps. 2349 sPreloadedDrawables[0].put(key, cs); 2350 sPreloadedDrawables[1].put(key, cs); 2351 } else { 2352 // Otherwise, only in the layout dir we loaded it for. 2353 sPreloadedDrawables[mConfiguration.getLayoutDirection()].put(key, cs); 2354 } 2355 } 2356 } 2357 } else { 2358 synchronized (mAccessLock) { 2359 final String themeKey = theme == null ? "" : theme.mKey; 2360 LongSparseArray<WeakReference<ConstantState>> themedCache = caches.get(themeKey); 2361 if (themedCache == null) { 2362 themedCache = new LongSparseArray<WeakReference<ConstantState>>(1); 2363 caches.put(themeKey, themedCache); 2364 } 2365 themedCache.put(key, new WeakReference<ConstantState>(cs)); 2366 } 2367 } 2368 } 2369 2370 /** 2371 * Loads a drawable from XML or resources stream. 2372 */ 2373 private Drawable loadDrawableForCookie(TypedValue value, int id, Theme theme) { 2374 if (value.string == null) { 2375 throw new NotFoundException("Resource \"" + getResourceName(id) + "\" (" 2376 + Integer.toHexString(id) + ") is not a Drawable (color or path): " + value); 2377 } 2378 2379 final String file = value.string.toString(); 2380 2381 if (TRACE_FOR_MISS_PRELOAD) { 2382 // Log only framework resources 2383 if ((id >>> 24) == 0x1) { 2384 final String name = getResourceName(id); 2385 if (name != null) { 2386 Log.d(TAG, "Loading framework drawable #" + Integer.toHexString(id) 2387 + ": " + name + " at " + file); 2388 } 2389 } 2390 } 2391 2392 if (DEBUG_LOAD) { 2393 Log.v(TAG, "Loading drawable for cookie " + value.assetCookie + ": " + file); 2394 } 2395 2396 final Drawable dr; 2397 2398 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2399 try { 2400 if (file.endsWith(".xml")) { 2401 final XmlResourceParser rp = loadXmlResourceParser( 2402 file, id, value.assetCookie, "drawable"); 2403 dr = Drawable.createFromXml(this, rp, theme); 2404 rp.close(); 2405 } else { 2406 final InputStream is = mAssets.openNonAsset( 2407 value.assetCookie, file, AssetManager.ACCESS_STREAMING); 2408 dr = Drawable.createFromResourceStream(this, value, is, file, null); 2409 is.close(); 2410 } 2411 } catch (Exception e) { 2412 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2413 final NotFoundException rnf = new NotFoundException( 2414 "File " + file + " from drawable resource ID #0x" + Integer.toHexString(id)); 2415 rnf.initCause(e); 2416 throw rnf; 2417 } 2418 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2419 2420 return dr; 2421 } 2422 2423 private Drawable getCachedDrawable( 2424 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 2425 long key, Theme theme) { 2426 synchronized (mAccessLock) { 2427 final String themeKey = theme != null ? theme.mKey : ""; 2428 final LongSparseArray<WeakReference<ConstantState>> themedCache = caches.get(themeKey); 2429 if (themedCache != null) { 2430 final Drawable themedDrawable = getCachedDrawableLocked(themedCache, key); 2431 if (themedDrawable != null) { 2432 return themedDrawable; 2433 } 2434 } 2435 2436 // No cached drawable, we'll need to create a new one. 2437 return null; 2438 } 2439 } 2440 2441 private ConstantState getConstantStateLocked( 2442 LongSparseArray<WeakReference<ConstantState>> drawableCache, long key) { 2443 final WeakReference<ConstantState> wr = drawableCache.get(key); 2444 if (wr != null) { // we have the key 2445 final ConstantState entry = wr.get(); 2446 if (entry != null) { 2447 //Log.i(TAG, "Returning cached drawable @ #" + 2448 // Integer.toHexString(((Integer)key).intValue()) 2449 // + " in " + this + ": " + entry); 2450 return entry; 2451 } else { // our entry has been purged 2452 drawableCache.delete(key); 2453 } 2454 } 2455 return null; 2456 } 2457 2458 private Drawable getCachedDrawableLocked( 2459 LongSparseArray<WeakReference<ConstantState>> drawableCache, long key) { 2460 final ConstantState entry = getConstantStateLocked(drawableCache, key); 2461 if (entry != null) { 2462 return entry.newDrawable(this); 2463 } 2464 return null; 2465 } 2466 2467 /*package*/ ColorStateList loadColorStateList(TypedValue value, int id) 2468 throws NotFoundException { 2469 if (TRACE_FOR_PRELOAD) { 2470 // Log only framework resources 2471 if ((id >>> 24) == 0x1) { 2472 final String name = getResourceName(id); 2473 if (name != null) android.util.Log.d("PreloadColorStateList", name); 2474 } 2475 } 2476 2477 final long key = (((long) value.assetCookie) << 32) | value.data; 2478 2479 ColorStateList csl; 2480 2481 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2482 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2483 2484 csl = sPreloadedColorStateLists.get(key); 2485 if (csl != null) { 2486 return csl; 2487 } 2488 2489 csl = ColorStateList.valueOf(value.data); 2490 if (mPreloading) { 2491 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2492 "color")) { 2493 sPreloadedColorStateLists.put(key, csl); 2494 } 2495 } 2496 2497 return csl; 2498 } 2499 2500 csl = getCachedColorStateList(key); 2501 if (csl != null) { 2502 return csl; 2503 } 2504 2505 csl = sPreloadedColorStateLists.get(key); 2506 if (csl != null) { 2507 return csl; 2508 } 2509 2510 if (value.string == null) { 2511 throw new NotFoundException( 2512 "Resource is not a ColorStateList (color or path): " + value); 2513 } 2514 2515 final String file = value.string.toString(); 2516 2517 if (file.endsWith(".xml")) { 2518 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2519 try { 2520 final XmlResourceParser rp = loadXmlResourceParser( 2521 file, id, value.assetCookie, "colorstatelist"); 2522 csl = ColorStateList.createFromXml(this, rp); 2523 rp.close(); 2524 } catch (Exception e) { 2525 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2526 NotFoundException rnf = new NotFoundException( 2527 "File " + file + " from color state list resource ID #0x" 2528 + Integer.toHexString(id)); 2529 rnf.initCause(e); 2530 throw rnf; 2531 } 2532 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2533 } else { 2534 throw new NotFoundException( 2535 "File " + file + " from drawable resource ID #0x" 2536 + Integer.toHexString(id) + ": .xml extension required"); 2537 } 2538 2539 if (csl != null) { 2540 if (mPreloading) { 2541 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2542 "color")) { 2543 sPreloadedColorStateLists.put(key, csl); 2544 } 2545 } else { 2546 synchronized (mAccessLock) { 2547 //Log.i(TAG, "Saving cached color state list @ #" + 2548 // Integer.toHexString(key.intValue()) 2549 // + " in " + this + ": " + csl); 2550 mColorStateListCache.put(key, new WeakReference<ColorStateList>(csl)); 2551 } 2552 } 2553 } 2554 2555 return csl; 2556 } 2557 2558 private ColorStateList getCachedColorStateList(long key) { 2559 synchronized (mAccessLock) { 2560 WeakReference<ColorStateList> wr = mColorStateListCache.get(key); 2561 if (wr != null) { // we have the key 2562 ColorStateList entry = wr.get(); 2563 if (entry != null) { 2564 //Log.i(TAG, "Returning cached color state list @ #" + 2565 // Integer.toHexString(((Integer)key).intValue()) 2566 // + " in " + this + ": " + entry); 2567 return entry; 2568 } else { // our entry has been purged 2569 mColorStateListCache.delete(key); 2570 } 2571 } 2572 } 2573 return null; 2574 } 2575 2576 /*package*/ XmlResourceParser loadXmlResourceParser(int id, String type) 2577 throws NotFoundException { 2578 synchronized (mAccessLock) { 2579 TypedValue value = mTmpValue; 2580 if (value == null) { 2581 mTmpValue = value = new TypedValue(); 2582 } 2583 getValue(id, value, true); 2584 if (value.type == TypedValue.TYPE_STRING) { 2585 return loadXmlResourceParser(value.string.toString(), id, 2586 value.assetCookie, type); 2587 } 2588 throw new NotFoundException( 2589 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 2590 + Integer.toHexString(value.type) + " is not valid"); 2591 } 2592 } 2593 2594 /*package*/ XmlResourceParser loadXmlResourceParser(String file, int id, 2595 int assetCookie, String type) throws NotFoundException { 2596 if (id != 0) { 2597 try { 2598 // These may be compiled... 2599 synchronized (mCachedXmlBlockIds) { 2600 // First see if this block is in our cache. 2601 final int num = mCachedXmlBlockIds.length; 2602 for (int i=0; i<num; i++) { 2603 if (mCachedXmlBlockIds[i] == id) { 2604 //System.out.println("**** REUSING XML BLOCK! id=" 2605 // + id + ", index=" + i); 2606 return mCachedXmlBlocks[i].newParser(); 2607 } 2608 } 2609 2610 // Not in the cache, create a new block and put it at 2611 // the next slot in the cache. 2612 XmlBlock block = mAssets.openXmlBlockAsset( 2613 assetCookie, file); 2614 if (block != null) { 2615 int pos = mLastCachedXmlBlockIndex+1; 2616 if (pos >= num) pos = 0; 2617 mLastCachedXmlBlockIndex = pos; 2618 XmlBlock oldBlock = mCachedXmlBlocks[pos]; 2619 if (oldBlock != null) { 2620 oldBlock.close(); 2621 } 2622 mCachedXmlBlockIds[pos] = id; 2623 mCachedXmlBlocks[pos] = block; 2624 //System.out.println("**** CACHING NEW XML BLOCK! id=" 2625 // + id + ", index=" + pos); 2626 return block.newParser(); 2627 } 2628 } 2629 } catch (Exception e) { 2630 NotFoundException rnf = new NotFoundException( 2631 "File " + file + " from xml type " + type + " resource ID #0x" 2632 + Integer.toHexString(id)); 2633 rnf.initCause(e); 2634 throw rnf; 2635 } 2636 } 2637 2638 throw new NotFoundException( 2639 "File " + file + " from xml type " + type + " resource ID #0x" 2640 + Integer.toHexString(id)); 2641 } 2642 2643 /*package*/ void recycleCachedStyledAttributes(TypedArray attrs) { 2644 synchronized (mAccessLock) { 2645 final TypedArray cached = mCachedStyledAttributes; 2646 if (cached == null || cached.mData.length < attrs.mData.length) { 2647 mCachedStyledAttributes = attrs; 2648 } 2649 } 2650 } 2651 2652 private Resources() { 2653 mAssets = AssetManager.getSystem(); 2654 // NOTE: Intentionally leaving this uninitialized (all values set 2655 // to zero), so that anyone who tries to do something that requires 2656 // metrics will get a very wrong value. 2657 mConfiguration.setToDefaults(); 2658 mMetrics.setToDefaults(); 2659 updateConfiguration(null, null); 2660 mAssets.ensureStringBlocks(); 2661 } 2662} 2663