Resources.java revision b1e1dbfb36b658bd2710fedf8c0381a5d89fa302
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.content.res; 18 19import com.android.internal.util.XmlUtils; 20 21import org.xmlpull.v1.XmlPullParser; 22import org.xmlpull.v1.XmlPullParserException; 23 24import android.annotation.Nullable; 25import android.content.pm.ActivityInfo; 26import android.graphics.Movie; 27import android.graphics.drawable.Drawable; 28import android.graphics.drawable.ColorDrawable; 29import android.graphics.drawable.Drawable.ConstantState; 30import android.os.Build; 31import android.os.Bundle; 32import android.os.IBinder; 33import android.os.Trace; 34import android.util.ArrayMap; 35import android.util.AttributeSet; 36import android.util.DisplayMetrics; 37import android.util.Log; 38import android.util.Slog; 39import android.util.TypedValue; 40import android.util.LongSparseArray; 41 42import java.io.IOException; 43import java.io.InputStream; 44import java.lang.ref.WeakReference; 45import java.util.Locale; 46 47import libcore.icu.NativePluralRules; 48 49/** 50 * Class for accessing an application's resources. This sits on top of the 51 * asset manager of the application (accessible through {@link #getAssets}) and 52 * provides a high-level API for getting typed data from the assets. 53 * 54 * <p>The Android resource system keeps track of all non-code assets associated with an 55 * application. You can use this class to access your application's resources. You can generally 56 * acquire the {@link android.content.res.Resources} instance associated with your application 57 * with {@link android.content.Context#getResources getResources()}.</p> 58 * 59 * <p>The Android SDK tools compile your application's resources into the application binary 60 * at build time. To use a resource, you must install it correctly in the source tree (inside 61 * your project's {@code res/} directory) and build your application. As part of the build 62 * process, the SDK tools generate symbols for each resource, which you can use in your application 63 * code to access the resources.</p> 64 * 65 * <p>Using application resources makes it easy to update various characteristics of your 66 * application without modifying code, and—by providing sets of alternative 67 * resources—enables you to optimize your application for a variety of device configurations 68 * (such as for different languages and screen sizes). This is an important aspect of developing 69 * Android applications that are compatible on different types of devices.</p> 70 * 71 * <p>For more information about using resources, see the documentation about <a 72 * href="{@docRoot}guide/topics/resources/index.html">Application Resources</a>.</p> 73 */ 74public class Resources { 75 static final String TAG = "Resources"; 76 77 private static final boolean DEBUG_LOAD = false; 78 private static final boolean DEBUG_CONFIG = false; 79 private static final boolean TRACE_FOR_PRELOAD = false; 80 private static final boolean TRACE_FOR_MISS_PRELOAD = false; 81 82 private static final int LAYOUT_DIR_CONFIG = ActivityInfo.activityInfoConfigToNative( 83 ActivityInfo.CONFIG_LAYOUT_DIRECTION); 84 85 private static final int ID_OTHER = 0x01000004; 86 87 private static final Object sSync = new Object(); 88 89 // Information about preloaded resources. Note that they are not 90 // protected by a lock, because while preloading in zygote we are all 91 // single-threaded, and after that these are immutable. 92 private static final LongSparseArray<ConstantState>[] sPreloadedDrawables; 93 private static final LongSparseArray<ConstantState> sPreloadedColorDrawables 94 = new LongSparseArray<ConstantState>(); 95 private static final LongSparseArray<ColorStateList> sPreloadedColorStateLists 96 = new LongSparseArray<ColorStateList>(); 97 98 // Used by BridgeResources in layoutlib 99 static Resources mSystem = null; 100 101 private static boolean sPreloaded; 102 private static int sPreloadedDensity; 103 104 // These are protected by mAccessLock. 105 private final Object mAccessLock = new Object(); 106 private final Configuration mTmpConfig = new Configuration(); 107 private final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> mDrawableCache = 108 new ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>>(); 109 private final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> mColorDrawableCache = 110 new ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>>(); 111 private final LongSparseArray<WeakReference<ColorStateList>> mColorStateListCache = 112 new LongSparseArray<WeakReference<ColorStateList>>(); 113 114 private TypedValue mTmpValue = new TypedValue(); 115 private boolean mPreloading; 116 117 private TypedArray mCachedStyledAttributes = null; 118 119 private int mLastCachedXmlBlockIndex = -1; 120 private final int[] mCachedXmlBlockIds = { 0, 0, 0, 0 }; 121 private final XmlBlock[] mCachedXmlBlocks = new XmlBlock[4]; 122 123 private final AssetManager mAssets; 124 private final Configuration mConfiguration = new Configuration(); 125 private final DisplayMetrics mMetrics = new DisplayMetrics(); 126 private NativePluralRules mPluralRule; 127 128 private CompatibilityInfo mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 129 130 @SuppressWarnings("unused") 131 private WeakReference<IBinder> mToken; 132 133 static { 134 sPreloadedDrawables = new LongSparseArray[2]; 135 sPreloadedDrawables[0] = new LongSparseArray<ConstantState>(); 136 sPreloadedDrawables[1] = new LongSparseArray<ConstantState>(); 137 } 138 139 /** 140 * Returns the most appropriate default theme for the specified target SDK version. 141 * <ul> 142 * <li>Below API 11: Gingerbread 143 * <li>APIs 11 thru 14: Holo 144 * <li>APIs 14 thru XX: Device default dark 145 * <li>API XX and above: Device default light with dark action bar 146 * </ul> 147 * 148 * @param curTheme The current theme, or 0 if not specified. 149 * @param targetSdkVersion The target SDK version. 150 * @return A theme resource identifier 151 * @hide 152 */ 153 public static int selectDefaultTheme(int curTheme, int targetSdkVersion) { 154 return selectSystemTheme(curTheme, targetSdkVersion, 155 com.android.internal.R.style.Theme, 156 com.android.internal.R.style.Theme_Holo, 157 com.android.internal.R.style.Theme_DeviceDefault, 158 com.android.internal.R.style.Theme_DeviceDefault_Light_DarkActionBar); 159 } 160 161 /** @hide */ 162 public static int selectSystemTheme(int curTheme, int targetSdkVersion, int orig, int holo, 163 int dark, int deviceDefault) { 164 if (curTheme != 0) { 165 return curTheme; 166 } 167 if (targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) { 168 return orig; 169 } 170 if (targetSdkVersion < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 171 return holo; 172 } 173 if (targetSdkVersion < Build.VERSION_CODES.CUR_DEVELOPMENT) { 174 return dark; 175 } 176 return deviceDefault; 177 } 178 179 /** 180 * This exception is thrown by the resource APIs when a requested resource 181 * can not be found. 182 */ 183 public static class NotFoundException extends RuntimeException { 184 public NotFoundException() { 185 } 186 187 public NotFoundException(String name) { 188 super(name); 189 } 190 } 191 192 /** 193 * Create a new Resources object on top of an existing set of assets in an 194 * AssetManager. 195 * 196 * @param assets Previously created AssetManager. 197 * @param metrics Current display metrics to consider when 198 * selecting/computing resource values. 199 * @param config Desired device configuration to consider when 200 * selecting/computing resource values (optional). 201 */ 202 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config) { 203 this(assets, metrics, config, CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO, null); 204 } 205 206 /** 207 * Creates a new Resources object with CompatibilityInfo. 208 * 209 * @param assets Previously created AssetManager. 210 * @param metrics Current display metrics to consider when 211 * selecting/computing resource values. 212 * @param config Desired device configuration to consider when 213 * selecting/computing resource values (optional). 214 * @param compatInfo this resource's compatibility info. Must not be null. 215 * @param token The Activity token for determining stack affiliation. Usually null. 216 * @hide 217 */ 218 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config, 219 CompatibilityInfo compatInfo, IBinder token) { 220 mAssets = assets; 221 mMetrics.setToDefaults(); 222 if (compatInfo != null) { 223 mCompatibilityInfo = compatInfo; 224 } 225 mToken = new WeakReference<IBinder>(token); 226 updateConfiguration(config, metrics); 227 assets.ensureStringBlocks(); 228 } 229 230 /** 231 * Return a global shared Resources object that provides access to only 232 * system resources (no application resources), and is not configured for 233 * the current screen (can not use dimension units, does not change based 234 * on orientation, etc). 235 */ 236 public static Resources getSystem() { 237 synchronized (sSync) { 238 Resources ret = mSystem; 239 if (ret == null) { 240 ret = new Resources(); 241 mSystem = ret; 242 } 243 244 return ret; 245 } 246 } 247 248 /** 249 * Return the string value associated with a particular resource ID. The 250 * returned object will be a String if this is a plain string; it will be 251 * some other type of CharSequence if it is styled. 252 * {@more} 253 * 254 * @param id The desired resource identifier, as generated by the aapt 255 * tool. This integer encodes the package, type, and resource 256 * entry. The value 0 is an invalid identifier. 257 * 258 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 259 * 260 * @return CharSequence The string data associated with the resource, plus 261 * possibly styled text information. 262 */ 263 public CharSequence getText(int id) throws NotFoundException { 264 CharSequence res = mAssets.getResourceText(id); 265 if (res != null) { 266 return res; 267 } 268 throw new NotFoundException("String resource ID #0x" 269 + Integer.toHexString(id)); 270 } 271 272 /** 273 * Returns the character sequence necessary for grammatically correct pluralization 274 * of the given resource ID for the given quantity. 275 * Note that the character sequence is selected based solely on grammatical necessity, 276 * and that such rules differ between languages. Do not assume you know which string 277 * will be returned for a given quantity. See 278 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 279 * for more detail. 280 * 281 * @param id The desired resource identifier, as generated by the aapt 282 * tool. This integer encodes the package, type, and resource 283 * entry. The value 0 is an invalid identifier. 284 * @param quantity The number used to get the correct string for the current language's 285 * plural rules. 286 * 287 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 288 * 289 * @return CharSequence The string data associated with the resource, plus 290 * possibly styled text information. 291 */ 292 public CharSequence getQuantityText(int id, int quantity) throws NotFoundException { 293 NativePluralRules rule = getPluralRule(); 294 CharSequence res = mAssets.getResourceBagText(id, 295 attrForQuantityCode(rule.quantityForInt(quantity))); 296 if (res != null) { 297 return res; 298 } 299 res = mAssets.getResourceBagText(id, ID_OTHER); 300 if (res != null) { 301 return res; 302 } 303 throw new NotFoundException("Plural resource ID #0x" + Integer.toHexString(id) 304 + " quantity=" + quantity 305 + " item=" + stringForQuantityCode(rule.quantityForInt(quantity))); 306 } 307 308 private NativePluralRules getPluralRule() { 309 synchronized (sSync) { 310 if (mPluralRule == null) { 311 mPluralRule = NativePluralRules.forLocale(mConfiguration.locale); 312 } 313 return mPluralRule; 314 } 315 } 316 317 private static int attrForQuantityCode(int quantityCode) { 318 switch (quantityCode) { 319 case NativePluralRules.ZERO: return 0x01000005; 320 case NativePluralRules.ONE: return 0x01000006; 321 case NativePluralRules.TWO: return 0x01000007; 322 case NativePluralRules.FEW: return 0x01000008; 323 case NativePluralRules.MANY: return 0x01000009; 324 default: return ID_OTHER; 325 } 326 } 327 328 private static String stringForQuantityCode(int quantityCode) { 329 switch (quantityCode) { 330 case NativePluralRules.ZERO: return "zero"; 331 case NativePluralRules.ONE: return "one"; 332 case NativePluralRules.TWO: return "two"; 333 case NativePluralRules.FEW: return "few"; 334 case NativePluralRules.MANY: return "many"; 335 default: return "other"; 336 } 337 } 338 339 /** 340 * Return the string value associated with a particular resource ID. It 341 * will be stripped of any styled text information. 342 * {@more} 343 * 344 * @param id The desired resource identifier, as generated by the aapt 345 * tool. This integer encodes the package, type, and resource 346 * entry. The value 0 is an invalid identifier. 347 * 348 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 349 * 350 * @return String The string data associated with the resource, 351 * stripped of styled text information. 352 */ 353 public String getString(int id) throws NotFoundException { 354 CharSequence res = getText(id); 355 if (res != null) { 356 return res.toString(); 357 } 358 throw new NotFoundException("String resource ID #0x" 359 + Integer.toHexString(id)); 360 } 361 362 363 /** 364 * Return the string value associated with a particular resource ID, 365 * substituting the format arguments as defined in {@link java.util.Formatter} 366 * and {@link java.lang.String#format}. It will be stripped of any styled text 367 * information. 368 * {@more} 369 * 370 * @param id The desired resource identifier, as generated by the aapt 371 * tool. This integer encodes the package, type, and resource 372 * entry. The value 0 is an invalid identifier. 373 * 374 * @param formatArgs The format arguments that will be used for substitution. 375 * 376 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 377 * 378 * @return String The string data associated with the resource, 379 * stripped of styled text information. 380 */ 381 public String getString(int id, Object... formatArgs) throws NotFoundException { 382 String raw = getString(id); 383 return String.format(mConfiguration.locale, raw, formatArgs); 384 } 385 386 /** 387 * Formats the string necessary for grammatically correct pluralization 388 * of the given resource ID for the given quantity, using the given arguments. 389 * Note that the string is selected based solely on grammatical necessity, 390 * and that such rules differ between languages. Do not assume you know which string 391 * will be returned for a given quantity. See 392 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 393 * for more detail. 394 * 395 * <p>Substitution of format arguments works as if using 396 * {@link java.util.Formatter} and {@link java.lang.String#format}. 397 * The resulting string will be stripped of any styled text information. 398 * 399 * @param id The desired resource identifier, as generated by the aapt 400 * tool. This integer encodes the package, type, and resource 401 * entry. The value 0 is an invalid identifier. 402 * @param quantity The number used to get the correct string for the current language's 403 * plural rules. 404 * @param formatArgs The format arguments that will be used for substitution. 405 * 406 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 407 * 408 * @return String The string data associated with the resource, 409 * stripped of styled text information. 410 */ 411 public String getQuantityString(int id, int quantity, Object... formatArgs) 412 throws NotFoundException { 413 String raw = getQuantityText(id, quantity).toString(); 414 return String.format(mConfiguration.locale, raw, formatArgs); 415 } 416 417 /** 418 * Returns the string necessary for grammatically correct pluralization 419 * of the given resource ID for the given quantity. 420 * Note that the string is selected based solely on grammatical necessity, 421 * and that such rules differ between languages. Do not assume you know which string 422 * will be returned for a given quantity. See 423 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 424 * for more detail. 425 * 426 * @param id The desired resource identifier, as generated by the aapt 427 * tool. This integer encodes the package, type, and resource 428 * entry. The value 0 is an invalid identifier. 429 * @param quantity The number used to get the correct string for the current language's 430 * plural rules. 431 * 432 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 433 * 434 * @return String The string data associated with the resource, 435 * stripped of styled text information. 436 */ 437 public String getQuantityString(int id, int quantity) throws NotFoundException { 438 return getQuantityText(id, quantity).toString(); 439 } 440 441 /** 442 * Return the string value associated with a particular resource ID. The 443 * returned object will be a String if this is a plain string; it will be 444 * some other type of CharSequence if it is styled. 445 * 446 * @param id The desired resource identifier, as generated by the aapt 447 * tool. This integer encodes the package, type, and resource 448 * entry. The value 0 is an invalid identifier. 449 * 450 * @param def The default CharSequence to return. 451 * 452 * @return CharSequence The string data associated with the resource, plus 453 * possibly styled text information, or def if id is 0 or not found. 454 */ 455 public CharSequence getText(int id, CharSequence def) { 456 CharSequence res = id != 0 ? mAssets.getResourceText(id) : null; 457 return res != null ? res : def; 458 } 459 460 /** 461 * Return the styled text array associated with a particular resource ID. 462 * 463 * @param id The desired resource identifier, as generated by the aapt 464 * tool. This integer encodes the package, type, and resource 465 * entry. The value 0 is an invalid identifier. 466 * 467 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 468 * 469 * @return The styled text array associated with the resource. 470 */ 471 public CharSequence[] getTextArray(int id) throws NotFoundException { 472 CharSequence[] res = mAssets.getResourceTextArray(id); 473 if (res != null) { 474 return res; 475 } 476 throw new NotFoundException("Text array resource ID #0x" 477 + Integer.toHexString(id)); 478 } 479 480 /** 481 * Return the string array associated with a particular resource ID. 482 * 483 * @param id The desired resource identifier, as generated by the aapt 484 * tool. This integer encodes the package, type, and resource 485 * entry. The value 0 is an invalid identifier. 486 * 487 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 488 * 489 * @return The string array associated with the resource. 490 */ 491 public String[] getStringArray(int id) throws NotFoundException { 492 String[] res = mAssets.getResourceStringArray(id); 493 if (res != null) { 494 return res; 495 } 496 throw new NotFoundException("String array resource ID #0x" 497 + Integer.toHexString(id)); 498 } 499 500 /** 501 * Return the int array associated with a particular resource ID. 502 * 503 * @param id The desired resource identifier, as generated by the aapt 504 * tool. This integer encodes the package, type, and resource 505 * entry. The value 0 is an invalid identifier. 506 * 507 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 508 * 509 * @return The int array associated with the resource. 510 */ 511 public int[] getIntArray(int id) throws NotFoundException { 512 int[] res = mAssets.getArrayIntResource(id); 513 if (res != null) { 514 return res; 515 } 516 throw new NotFoundException("Int array resource ID #0x" 517 + Integer.toHexString(id)); 518 } 519 520 /** 521 * Return an array of heterogeneous values. 522 * 523 * @param id The desired resource identifier, as generated by the aapt 524 * tool. This integer encodes the package, type, and resource 525 * entry. The value 0 is an invalid identifier. 526 * 527 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 528 * 529 * @return Returns a TypedArray holding an array of the array values. 530 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 531 * when done with it. 532 */ 533 public TypedArray obtainTypedArray(int id) throws NotFoundException { 534 int len = mAssets.getArraySize(id); 535 if (len < 0) { 536 throw new NotFoundException("Array resource ID #0x" 537 + Integer.toHexString(id)); 538 } 539 540 TypedArray array = TypedArray.obtain(this, len); 541 array.mLength = mAssets.retrieveArray(id, array.mData); 542 array.mIndices[0] = 0; 543 544 return array; 545 } 546 547 /** 548 * Retrieve a dimensional for a particular resource ID. Unit 549 * conversions are based on the current {@link DisplayMetrics} associated 550 * with the resources. 551 * 552 * @param id The desired resource identifier, as generated by the aapt 553 * tool. This integer encodes the package, type, and resource 554 * entry. The value 0 is an invalid identifier. 555 * 556 * @return Resource dimension value multiplied by the appropriate 557 * metric. 558 * 559 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 560 * 561 * @see #getDimensionPixelOffset 562 * @see #getDimensionPixelSize 563 */ 564 public float getDimension(int id) throws NotFoundException { 565 synchronized (mAccessLock) { 566 TypedValue value = mTmpValue; 567 if (value == null) { 568 mTmpValue = value = new TypedValue(); 569 } 570 getValue(id, value, true); 571 if (value.type == TypedValue.TYPE_DIMENSION) { 572 return TypedValue.complexToDimension(value.data, mMetrics); 573 } 574 throw new NotFoundException( 575 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 576 + Integer.toHexString(value.type) + " is not valid"); 577 } 578 } 579 580 /** 581 * Retrieve a dimensional for a particular resource ID for use 582 * as an offset in raw pixels. This is the same as 583 * {@link #getDimension}, except the returned value is converted to 584 * integer pixels for you. An offset conversion involves simply 585 * truncating the base value to an integer. 586 * 587 * @param id The desired resource identifier, as generated by the aapt 588 * tool. This integer encodes the package, type, and resource 589 * entry. The value 0 is an invalid identifier. 590 * 591 * @return Resource dimension value multiplied by the appropriate 592 * metric and truncated to integer pixels. 593 * 594 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 595 * 596 * @see #getDimension 597 * @see #getDimensionPixelSize 598 */ 599 public int getDimensionPixelOffset(int id) throws NotFoundException { 600 synchronized (mAccessLock) { 601 TypedValue value = mTmpValue; 602 if (value == null) { 603 mTmpValue = value = new TypedValue(); 604 } 605 getValue(id, value, true); 606 if (value.type == TypedValue.TYPE_DIMENSION) { 607 return TypedValue.complexToDimensionPixelOffset( 608 value.data, mMetrics); 609 } 610 throw new NotFoundException( 611 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 612 + Integer.toHexString(value.type) + " is not valid"); 613 } 614 } 615 616 /** 617 * Retrieve a dimensional for a particular resource ID for use 618 * as a size in raw pixels. This is the same as 619 * {@link #getDimension}, except the returned value is converted to 620 * integer pixels for use as a size. A size conversion involves 621 * rounding the base value, and ensuring that a non-zero base value 622 * is at least one pixel in size. 623 * 624 * @param id The desired resource identifier, as generated by the aapt 625 * tool. This integer encodes the package, type, and resource 626 * entry. The value 0 is an invalid identifier. 627 * 628 * @return Resource dimension value multiplied by the appropriate 629 * metric and truncated to integer pixels. 630 * 631 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 632 * 633 * @see #getDimension 634 * @see #getDimensionPixelOffset 635 */ 636 public int getDimensionPixelSize(int id) throws NotFoundException { 637 synchronized (mAccessLock) { 638 TypedValue value = mTmpValue; 639 if (value == null) { 640 mTmpValue = value = new TypedValue(); 641 } 642 getValue(id, value, true); 643 if (value.type == TypedValue.TYPE_DIMENSION) { 644 return TypedValue.complexToDimensionPixelSize( 645 value.data, mMetrics); 646 } 647 throw new NotFoundException( 648 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 649 + Integer.toHexString(value.type) + " is not valid"); 650 } 651 } 652 653 /** 654 * Retrieve a fractional unit for a particular resource ID. 655 * 656 * @param id The desired resource identifier, as generated by the aapt 657 * tool. This integer encodes the package, type, and resource 658 * entry. The value 0 is an invalid identifier. 659 * @param base The base value of this fraction. In other words, a 660 * standard fraction is multiplied by this value. 661 * @param pbase The parent base value of this fraction. In other 662 * words, a parent fraction (nn%p) is multiplied by this 663 * value. 664 * 665 * @return Attribute fractional value multiplied by the appropriate 666 * base value. 667 * 668 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 669 */ 670 public float getFraction(int id, int base, int pbase) { 671 synchronized (mAccessLock) { 672 TypedValue value = mTmpValue; 673 if (value == null) { 674 mTmpValue = value = new TypedValue(); 675 } 676 getValue(id, value, true); 677 if (value.type == TypedValue.TYPE_FRACTION) { 678 return TypedValue.complexToFraction(value.data, base, pbase); 679 } 680 throw new NotFoundException( 681 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 682 + Integer.toHexString(value.type) + " is not valid"); 683 } 684 } 685 686 /** 687 * Return a drawable object associated with a particular resource ID. 688 * Various types of objects will be returned depending on the underlying 689 * resource -- for example, a solid color, PNG image, scalable image, etc. 690 * The Drawable API hides these implementation details. 691 * 692 * <p class="note"><strong>Note:</strong> Prior to 693 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, this function 694 * would not correctly retrieve the final configuration density when 695 * the resource ID passed here is an alias to another Drawable resource. 696 * This means that if the density configuration of the alias resource 697 * is different than the actual resource, the density of the returned 698 * Drawable would be incorrect, resulting in bad scaling. To work 699 * around this, you can instead retrieve the Drawable through 700 * {@link TypedArray#getDrawable TypedArray.getDrawable}. Use 701 * {@link android.content.Context#obtainStyledAttributes(int[]) 702 * Context.obtainStyledAttributes} with 703 * an array containing the resource ID of interest to create the TypedArray.</p> 704 * 705 * <p class="note"><strong>Note:</strong> To obtain a themed drawable, use 706 * {@link android.content.Context#getDrawable(int) Context.getDrawable(int)} 707 * or {@link #getDrawable(int, Theme)} passing the desired theme.</p> 708 * 709 * @param id The desired resource identifier, as generated by the aapt 710 * tool. This integer encodes the package, type, and resource 711 * entry. The value 0 is an invalid identifier. 712 * @return Drawable An object that can be used to draw this resource. 713 * @throws NotFoundException Throws NotFoundException if the given ID does 714 * not exist. 715 * @see #getDrawable(int, Theme) 716 */ 717 public Drawable getDrawable(int id) throws NotFoundException { 718 return getDrawable(id, null); 719 } 720 721 /** 722 * Return a drawable object associated with a particular resource ID and 723 * styled for the specified theme. Various types of objects will be 724 * returned depending on the underlying resource -- for example, a solid 725 * color, PNG image, scalable image, etc. 726 * 727 * @param id The desired resource identifier, as generated by the aapt 728 * tool. This integer encodes the package, type, and resource 729 * entry. The value 0 is an invalid identifier. 730 * @param theme The theme used to style the drawable attributes, may be {@code null}. 731 * @return Drawable An object that can be used to draw this resource. 732 * @throws NotFoundException Throws NotFoundException if the given ID does 733 * not exist. 734 */ 735 public Drawable getDrawable(int id, @Nullable Theme theme) throws NotFoundException { 736 TypedValue value; 737 synchronized (mAccessLock) { 738 value = mTmpValue; 739 if (value == null) { 740 value = new TypedValue(); 741 } else { 742 mTmpValue = null; 743 } 744 getValue(id, value, true); 745 } 746 final Drawable res = loadDrawable(value, id, theme); 747 synchronized (mAccessLock) { 748 if (mTmpValue == null) { 749 mTmpValue = value; 750 } 751 } 752 return res; 753 } 754 755 /** 756 * Return a drawable object associated with a particular resource ID for the 757 * given screen density in DPI. This will set the drawable's density to be 758 * the device's density multiplied by the ratio of actual drawable density 759 * to requested density. This allows the drawable to be scaled up to the 760 * correct size if needed. Various types of objects will be returned 761 * depending on the underlying resource -- for example, a solid color, PNG 762 * image, scalable image, etc. The Drawable API hides these implementation 763 * details. 764 * 765 * <p class="note"><strong>Note:</strong> To obtain a themed drawable, use 766 * {@link android.content.Context#getDrawable(int) Context.getDrawable(int)} 767 * or {@link #getDrawableForDensity(int, int, Theme)} passing the desired 768 * theme.</p> 769 * 770 * @param id The desired resource identifier, as generated by the aapt tool. 771 * This integer encodes the package, type, and resource entry. 772 * The value 0 is an invalid identifier. 773 * @param density the desired screen density indicated by the resource as 774 * found in {@link DisplayMetrics}. 775 * @return Drawable An object that can be used to draw this resource. 776 * @throws NotFoundException Throws NotFoundException if the given ID does 777 * not exist. 778 * @see #getDrawableForDensity(int, int, Theme) 779 */ 780 public Drawable getDrawableForDensity(int id, int density) throws NotFoundException { 781 return getDrawableForDensity(id, density, null); 782 } 783 784 /** 785 * Return a drawable object associated with a particular resource ID for the 786 * given screen density in DPI and styled for the specified theme. 787 * 788 * @param id The desired resource identifier, as generated by the aapt tool. 789 * This integer encodes the package, type, and resource entry. 790 * The value 0 is an invalid identifier. 791 * @param density The desired screen density indicated by the resource as 792 * found in {@link DisplayMetrics}. 793 * @param theme The theme used to style the drawable attributes, may be {@code null}. 794 * @return Drawable An object that can be used to draw this resource. 795 * @throws NotFoundException Throws NotFoundException if the given ID does 796 * not exist. 797 */ 798 public Drawable getDrawableForDensity(int id, int density, @Nullable Theme theme) { 799 TypedValue value; 800 synchronized (mAccessLock) { 801 value = mTmpValue; 802 if (value == null) { 803 value = new TypedValue(); 804 } else { 805 mTmpValue = null; 806 } 807 getValueForDensity(id, density, value, true); 808 809 /* 810 * Pretend the requested density is actually the display density. If 811 * the drawable returned is not the requested density, then force it 812 * to be scaled later by dividing its density by the ratio of 813 * requested density to actual device density. Drawables that have 814 * undefined density or no density don't need to be handled here. 815 */ 816 if (value.density > 0 && value.density != TypedValue.DENSITY_NONE) { 817 if (value.density == density) { 818 value.density = mMetrics.densityDpi; 819 } else { 820 value.density = (value.density * mMetrics.densityDpi) / density; 821 } 822 } 823 } 824 825 final Drawable res = loadDrawable(value, id, theme); 826 synchronized (mAccessLock) { 827 if (mTmpValue == null) { 828 mTmpValue = value; 829 } 830 } 831 return res; 832 } 833 834 /** 835 * Return a movie object associated with the particular resource ID. 836 * @param id The desired resource identifier, as generated by the aapt 837 * tool. This integer encodes the package, type, and resource 838 * entry. The value 0 is an invalid identifier. 839 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 840 * 841 */ 842 public Movie getMovie(int id) throws NotFoundException { 843 InputStream is = openRawResource(id); 844 Movie movie = Movie.decodeStream(is); 845 try { 846 is.close(); 847 } 848 catch (java.io.IOException e) { 849 // don't care, since the return value is valid 850 } 851 return movie; 852 } 853 854 /** 855 * Return a color integer associated with a particular resource ID. 856 * If the resource holds a complex 857 * {@link android.content.res.ColorStateList}, then the default color from 858 * the set is returned. 859 * 860 * @param id The desired resource identifier, as generated by the aapt 861 * tool. This integer encodes the package, type, and resource 862 * entry. The value 0 is an invalid identifier. 863 * 864 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 865 * 866 * @return Returns a single color value in the form 0xAARRGGBB. 867 */ 868 public int getColor(int id) throws NotFoundException { 869 TypedValue value; 870 synchronized (mAccessLock) { 871 value = mTmpValue; 872 if (value == null) { 873 value = new TypedValue(); 874 } 875 getValue(id, value, true); 876 if (value.type >= TypedValue.TYPE_FIRST_INT 877 && value.type <= TypedValue.TYPE_LAST_INT) { 878 mTmpValue = value; 879 return value.data; 880 } else if (value.type != TypedValue.TYPE_STRING) { 881 throw new NotFoundException( 882 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 883 + Integer.toHexString(value.type) + " is not valid"); 884 } 885 mTmpValue = null; 886 } 887 ColorStateList csl = loadColorStateList(value, id); 888 synchronized (mAccessLock) { 889 if (mTmpValue == null) { 890 mTmpValue = value; 891 } 892 } 893 return csl.getDefaultColor(); 894 } 895 896 /** 897 * Return a color state list associated with a particular resource ID. The 898 * resource may contain either a single raw color value, or a complex 899 * {@link android.content.res.ColorStateList} holding multiple possible colors. 900 * 901 * @param id The desired resource identifier of a {@link ColorStateList}, 902 * as generated by the aapt tool. This integer encodes the package, type, and resource 903 * entry. The value 0 is an invalid identifier. 904 * 905 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 906 * 907 * @return Returns a ColorStateList object containing either a single 908 * solid color or multiple colors that can be selected based on a state. 909 */ 910 public ColorStateList getColorStateList(int id) throws NotFoundException { 911 TypedValue value; 912 synchronized (mAccessLock) { 913 value = mTmpValue; 914 if (value == null) { 915 value = new TypedValue(); 916 } else { 917 mTmpValue = null; 918 } 919 getValue(id, value, true); 920 } 921 ColorStateList res = loadColorStateList(value, id); 922 synchronized (mAccessLock) { 923 if (mTmpValue == null) { 924 mTmpValue = value; 925 } 926 } 927 return res; 928 } 929 930 /** 931 * Return a boolean associated with a particular resource ID. This can be 932 * used with any integral resource value, and will return true if it is 933 * non-zero. 934 * 935 * @param id The desired resource identifier, as generated by the aapt 936 * tool. This integer encodes the package, type, and resource 937 * entry. The value 0 is an invalid identifier. 938 * 939 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 940 * 941 * @return Returns the boolean value contained in the resource. 942 */ 943 public boolean getBoolean(int id) throws NotFoundException { 944 synchronized (mAccessLock) { 945 TypedValue value = mTmpValue; 946 if (value == null) { 947 mTmpValue = value = new TypedValue(); 948 } 949 getValue(id, value, true); 950 if (value.type >= TypedValue.TYPE_FIRST_INT 951 && value.type <= TypedValue.TYPE_LAST_INT) { 952 return value.data != 0; 953 } 954 throw new NotFoundException( 955 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 956 + Integer.toHexString(value.type) + " is not valid"); 957 } 958 } 959 960 /** 961 * Return an integer associated with a particular resource ID. 962 * 963 * @param id The desired resource identifier, as generated by the aapt 964 * tool. This integer encodes the package, type, and resource 965 * entry. The value 0 is an invalid identifier. 966 * 967 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 968 * 969 * @return Returns the integer value contained in the resource. 970 */ 971 public int getInteger(int id) throws NotFoundException { 972 synchronized (mAccessLock) { 973 TypedValue value = mTmpValue; 974 if (value == null) { 975 mTmpValue = value = new TypedValue(); 976 } 977 getValue(id, value, true); 978 if (value.type >= TypedValue.TYPE_FIRST_INT 979 && value.type <= TypedValue.TYPE_LAST_INT) { 980 return value.data; 981 } 982 throw new NotFoundException( 983 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 984 + Integer.toHexString(value.type) + " is not valid"); 985 } 986 } 987 988 /** 989 * Retrieve a floating-point value for a particular resource ID. 990 * 991 * @param id The desired resource identifier, as generated by the aapt 992 * tool. This integer encodes the package, type, and resource 993 * entry. The value 0 is an invalid identifier. 994 * 995 * @return Returns the floating-point value contained in the resource. 996 * 997 * @throws NotFoundException Throws NotFoundException if the given ID does 998 * not exist or is not a floating-point value. 999 * @hide Pending API council approval. 1000 */ 1001 public float getFloat(int id) { 1002 synchronized (mAccessLock) { 1003 TypedValue value = mTmpValue; 1004 if (value == null) { 1005 mTmpValue = value = new TypedValue(); 1006 } 1007 getValue(id, value, true); 1008 if (value.type == TypedValue.TYPE_FLOAT) { 1009 return value.getFloat(); 1010 } 1011 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id) + " type #0x" 1012 + Integer.toHexString(value.type) + " is not valid"); 1013 } 1014 } 1015 1016 /** 1017 * Return an XmlResourceParser through which you can read a view layout 1018 * description for the given resource ID. This parser has limited 1019 * functionality -- in particular, you can't change its input, and only 1020 * the high-level events are available. 1021 * 1022 * <p>This function is really a simple wrapper for calling 1023 * {@link #getXml} with a layout resource. 1024 * 1025 * @param id The desired resource identifier, as generated by the aapt 1026 * tool. This integer encodes the package, type, and resource 1027 * entry. The value 0 is an invalid identifier. 1028 * 1029 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1030 * 1031 * @return A new parser object through which you can read 1032 * the XML data. 1033 * 1034 * @see #getXml 1035 */ 1036 public XmlResourceParser getLayout(int id) throws NotFoundException { 1037 return loadXmlResourceParser(id, "layout"); 1038 } 1039 1040 /** 1041 * Return an XmlResourceParser through which you can read an animation 1042 * description for the given resource ID. This parser has limited 1043 * functionality -- in particular, you can't change its input, and only 1044 * the high-level events are available. 1045 * 1046 * <p>This function is really a simple wrapper for calling 1047 * {@link #getXml} with an animation resource. 1048 * 1049 * @param id The desired resource identifier, as generated by the aapt 1050 * tool. This integer encodes the package, type, and resource 1051 * entry. The value 0 is an invalid identifier. 1052 * 1053 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1054 * 1055 * @return A new parser object through which you can read 1056 * the XML data. 1057 * 1058 * @see #getXml 1059 */ 1060 public XmlResourceParser getAnimation(int id) throws NotFoundException { 1061 return loadXmlResourceParser(id, "anim"); 1062 } 1063 1064 /** 1065 * Return an XmlResourceParser through which you can read a generic XML 1066 * resource for the given resource ID. 1067 * 1068 * <p>The XmlPullParser implementation returned here has some limited 1069 * functionality. In particular, you can't change its input, and only 1070 * high-level parsing events are available (since the document was 1071 * pre-parsed for you at build time, which involved merging text and 1072 * stripping comments). 1073 * 1074 * @param id The desired resource identifier, as generated by the aapt 1075 * tool. This integer encodes the package, type, and resource 1076 * entry. The value 0 is an invalid identifier. 1077 * 1078 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1079 * 1080 * @return A new parser object through which you can read 1081 * the XML data. 1082 * 1083 * @see android.util.AttributeSet 1084 */ 1085 public XmlResourceParser getXml(int id) throws NotFoundException { 1086 return loadXmlResourceParser(id, "xml"); 1087 } 1088 1089 /** 1090 * Open a data stream for reading a raw resource. This can only be used 1091 * with resources whose value is the name of an asset files -- that is, it can be 1092 * used to open drawable, sound, and raw resources; it will fail on string 1093 * and color resources. 1094 * 1095 * @param id The resource identifier to open, as generated by the appt 1096 * tool. 1097 * 1098 * @return InputStream Access to the resource data. 1099 * 1100 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1101 * 1102 */ 1103 public InputStream openRawResource(int id) throws NotFoundException { 1104 TypedValue value; 1105 synchronized (mAccessLock) { 1106 value = mTmpValue; 1107 if (value == null) { 1108 value = new TypedValue(); 1109 } else { 1110 mTmpValue = null; 1111 } 1112 } 1113 InputStream res = openRawResource(id, value); 1114 synchronized (mAccessLock) { 1115 if (mTmpValue == null) { 1116 mTmpValue = value; 1117 } 1118 } 1119 return res; 1120 } 1121 1122 /** 1123 * Open a data stream for reading a raw resource. This can only be used 1124 * with resources whose value is the name of an asset file -- that is, it can be 1125 * used to open drawable, sound, and raw resources; it will fail on string 1126 * and color resources. 1127 * 1128 * @param id The resource identifier to open, as generated by the appt tool. 1129 * @param value The TypedValue object to hold the resource information. 1130 * 1131 * @return InputStream Access to the resource data. 1132 * 1133 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1134 */ 1135 public InputStream openRawResource(int id, TypedValue value) throws NotFoundException { 1136 getValue(id, value, true); 1137 1138 try { 1139 return mAssets.openNonAsset(value.assetCookie, value.string.toString(), 1140 AssetManager.ACCESS_STREAMING); 1141 } catch (Exception e) { 1142 NotFoundException rnf = new NotFoundException("File " + value.string.toString() + 1143 " from drawable resource ID #0x" + Integer.toHexString(id)); 1144 rnf.initCause(e); 1145 throw rnf; 1146 } 1147 } 1148 1149 /** 1150 * Open a file descriptor for reading a raw resource. This can only be used 1151 * with resources whose value is the name of an asset files -- that is, it can be 1152 * used to open drawable, sound, and raw resources; it will fail on string 1153 * and color resources. 1154 * 1155 * <p>This function only works for resources that are stored in the package 1156 * as uncompressed data, which typically includes things like mp3 files 1157 * and png images. 1158 * 1159 * @param id The resource identifier to open, as generated by the appt 1160 * tool. 1161 * 1162 * @return AssetFileDescriptor A new file descriptor you can use to read 1163 * the resource. This includes the file descriptor itself, as well as the 1164 * offset and length of data where the resource appears in the file. A 1165 * null is returned if the file exists but is compressed. 1166 * 1167 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1168 * 1169 */ 1170 public AssetFileDescriptor openRawResourceFd(int id) throws NotFoundException { 1171 TypedValue value; 1172 synchronized (mAccessLock) { 1173 value = mTmpValue; 1174 if (value == null) { 1175 value = new TypedValue(); 1176 } else { 1177 mTmpValue = null; 1178 } 1179 getValue(id, value, true); 1180 } 1181 try { 1182 return mAssets.openNonAssetFd( 1183 value.assetCookie, value.string.toString()); 1184 } catch (Exception e) { 1185 NotFoundException rnf = new NotFoundException( 1186 "File " + value.string.toString() 1187 + " from drawable resource ID #0x" 1188 + Integer.toHexString(id)); 1189 rnf.initCause(e); 1190 throw rnf; 1191 } finally { 1192 synchronized (mAccessLock) { 1193 if (mTmpValue == null) { 1194 mTmpValue = value; 1195 } 1196 } 1197 } 1198 } 1199 1200 /** 1201 * Return the raw data associated with a particular resource ID. 1202 * 1203 * @param id The desired resource identifier, as generated by the aapt 1204 * tool. This integer encodes the package, type, and resource 1205 * entry. The value 0 is an invalid identifier. 1206 * @param outValue Object in which to place the resource data. 1207 * @param resolveRefs If true, a resource that is a reference to another 1208 * resource will be followed so that you receive the 1209 * actual final resource data. If false, the TypedValue 1210 * will be filled in with the reference itself. 1211 * 1212 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1213 * 1214 */ 1215 public void getValue(int id, TypedValue outValue, boolean resolveRefs) 1216 throws NotFoundException { 1217 boolean found = mAssets.getResourceValue(id, 0, outValue, resolveRefs); 1218 if (found) { 1219 return; 1220 } 1221 throw new NotFoundException("Resource ID #0x" 1222 + Integer.toHexString(id)); 1223 } 1224 1225 /** 1226 * Get the raw value associated with a resource with associated density. 1227 * 1228 * @param id resource identifier 1229 * @param density density in DPI 1230 * @param resolveRefs If true, a resource that is a reference to another 1231 * resource will be followed so that you receive the actual final 1232 * resource data. If false, the TypedValue will be filled in with 1233 * the reference itself. 1234 * @throws NotFoundException Throws NotFoundException if the given ID does 1235 * not exist. 1236 * @see #getValue(String, TypedValue, boolean) 1237 */ 1238 public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs) 1239 throws NotFoundException { 1240 boolean found = mAssets.getResourceValue(id, density, outValue, resolveRefs); 1241 if (found) { 1242 return; 1243 } 1244 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)); 1245 } 1246 1247 /** 1248 * Return the raw data associated with a particular resource ID. 1249 * See getIdentifier() for information on how names are mapped to resource 1250 * IDs, and getString(int) for information on how string resources are 1251 * retrieved. 1252 * 1253 * <p>Note: use of this function is discouraged. It is much more 1254 * efficient to retrieve resources by identifier than by name. 1255 * 1256 * @param name The name of the desired resource. This is passed to 1257 * getIdentifier() with a default type of "string". 1258 * @param outValue Object in which to place the resource data. 1259 * @param resolveRefs If true, a resource that is a reference to another 1260 * resource will be followed so that you receive the 1261 * actual final resource data. If false, the TypedValue 1262 * will be filled in with the reference itself. 1263 * 1264 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1265 * 1266 */ 1267 public void getValue(String name, TypedValue outValue, boolean resolveRefs) 1268 throws NotFoundException { 1269 int id = getIdentifier(name, "string", null); 1270 if (id != 0) { 1271 getValue(id, outValue, resolveRefs); 1272 return; 1273 } 1274 throw new NotFoundException("String resource name " + name); 1275 } 1276 1277 /** 1278 * This class holds the current attribute values for a particular theme. 1279 * In other words, a Theme is a set of values for resource attributes; 1280 * these are used in conjunction with {@link TypedArray} 1281 * to resolve the final value for an attribute. 1282 * 1283 * <p>The Theme's attributes come into play in two ways: (1) a styled 1284 * attribute can explicit reference a value in the theme through the 1285 * "?themeAttribute" syntax; (2) if no value has been defined for a 1286 * particular styled attribute, as a last resort we will try to find that 1287 * attribute's value in the Theme. 1288 * 1289 * <p>You will normally use the {@link #obtainStyledAttributes} APIs to 1290 * retrieve XML attributes with style and theme information applied. 1291 */ 1292 public final class Theme { 1293 /** 1294 * Place new attribute values into the theme. The style resource 1295 * specified by <var>resid</var> will be retrieved from this Theme's 1296 * resources, its values placed into the Theme object. 1297 * 1298 * <p>The semantics of this function depends on the <var>force</var> 1299 * argument: If false, only values that are not already defined in 1300 * the theme will be copied from the system resource; otherwise, if 1301 * any of the style's attributes are already defined in the theme, the 1302 * current values in the theme will be overwritten. 1303 * 1304 * @param resId The resource ID of a style resource from which to 1305 * obtain attribute values. 1306 * @param force If true, values in the style resource will always be 1307 * used in the theme; otherwise, they will only be used 1308 * if not already defined in the theme. 1309 */ 1310 public void applyStyle(int resId, boolean force) { 1311 AssetManager.applyThemeStyle(mTheme, resId, force); 1312 1313 mThemeResId = resId; 1314 mKey += Integer.toHexString(resId) + (force ? "! " : " "); 1315 } 1316 1317 /** 1318 * Set this theme to hold the same contents as the theme 1319 * <var>other</var>. If both of these themes are from the same 1320 * Resources object, they will be identical after this function 1321 * returns. If they are from different Resources, only the resources 1322 * they have in common will be set in this theme. 1323 * 1324 * @param other The existing Theme to copy from. 1325 */ 1326 public void setTo(Theme other) { 1327 AssetManager.copyTheme(mTheme, other.mTheme); 1328 1329 mThemeResId = other.mThemeResId; 1330 mKey = other.mKey; 1331 } 1332 1333 /** 1334 * Return a TypedArray holding the values defined by 1335 * <var>Theme</var> which are listed in <var>attrs</var>. 1336 * 1337 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1338 * with the array. 1339 * 1340 * @param attrs The desired attributes. 1341 * 1342 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1343 * 1344 * @return Returns a TypedArray holding an array of the attribute values. 1345 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1346 * when done with it. 1347 * 1348 * @see Resources#obtainAttributes 1349 * @see #obtainStyledAttributes(int, int[]) 1350 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1351 */ 1352 public TypedArray obtainStyledAttributes(int[] attrs) { 1353 final int len = attrs.length; 1354 final TypedArray array = TypedArray.obtain(Resources.this, len); 1355 array.mTheme = this; 1356 AssetManager.applyStyle(mTheme, 0, 0, 0, attrs, array.mData, array.mIndices); 1357 return array; 1358 } 1359 1360 /** 1361 * Return a TypedArray holding the values defined by the style 1362 * resource <var>resid</var> which are listed in <var>attrs</var>. 1363 * 1364 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1365 * with the array. 1366 * 1367 * @param resid The desired style resource. 1368 * @param attrs The desired attributes in the style. 1369 * 1370 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1371 * 1372 * @return Returns a TypedArray holding an array of the attribute values. 1373 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1374 * when done with it. 1375 * 1376 * @see Resources#obtainAttributes 1377 * @see #obtainStyledAttributes(int[]) 1378 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1379 */ 1380 public TypedArray obtainStyledAttributes(int resid, int[] attrs) throws NotFoundException { 1381 final int len = attrs.length; 1382 final TypedArray array = TypedArray.obtain(Resources.this, len); 1383 array.mTheme = this; 1384 if (false) { 1385 int[] data = array.mData; 1386 1387 System.out.println("**********************************************************"); 1388 System.out.println("**********************************************************"); 1389 System.out.println("**********************************************************"); 1390 System.out.println("Attributes:"); 1391 String s = " Attrs:"; 1392 int i; 1393 for (i=0; i<attrs.length; i++) { 1394 s = s + " 0x" + Integer.toHexString(attrs[i]); 1395 } 1396 System.out.println(s); 1397 s = " Found:"; 1398 TypedValue value = new TypedValue(); 1399 for (i=0; i<attrs.length; i++) { 1400 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1401 value.type = data[d+AssetManager.STYLE_TYPE]; 1402 value.data = data[d+AssetManager.STYLE_DATA]; 1403 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1404 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1405 s = s + " 0x" + Integer.toHexString(attrs[i]) 1406 + "=" + value; 1407 } 1408 System.out.println(s); 1409 } 1410 AssetManager.applyStyle(mTheme, 0, resid, 0, attrs, array.mData, array.mIndices); 1411 return array; 1412 } 1413 1414 /** 1415 * Return a TypedArray holding the attribute values in 1416 * <var>set</var> 1417 * that are listed in <var>attrs</var>. In addition, if the given 1418 * AttributeSet specifies a style class (through the "style" attribute), 1419 * that style will be applied on top of the base attributes it defines. 1420 * 1421 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1422 * with the array. 1423 * 1424 * <p>When determining the final value of a particular attribute, there 1425 * are four inputs that come into play:</p> 1426 * 1427 * <ol> 1428 * <li> Any attribute values in the given AttributeSet. 1429 * <li> The style resource specified in the AttributeSet (named 1430 * "style"). 1431 * <li> The default style specified by <var>defStyleAttr</var> and 1432 * <var>defStyleRes</var> 1433 * <li> The base values in this theme. 1434 * </ol> 1435 * 1436 * <p>Each of these inputs is considered in-order, with the first listed 1437 * taking precedence over the following ones. In other words, if in the 1438 * AttributeSet you have supplied <code><Button 1439 * textColor="#ff000000"></code>, then the button's text will 1440 * <em>always</em> be black, regardless of what is specified in any of 1441 * the styles. 1442 * 1443 * @param set The base set of attribute values. May be null. 1444 * @param attrs The desired attributes to be retrieved. 1445 * @param defStyleAttr An attribute in the current theme that contains a 1446 * reference to a style resource that supplies 1447 * defaults values for the TypedArray. Can be 1448 * 0 to not look for defaults. 1449 * @param defStyleRes A resource identifier of a style resource that 1450 * supplies default values for the TypedArray, 1451 * used only if defStyleAttr is 0 or can not be found 1452 * in the theme. Can be 0 to not look for defaults. 1453 * 1454 * @return Returns a TypedArray holding an array of the attribute values. 1455 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1456 * when done with it. 1457 * 1458 * @see Resources#obtainAttributes 1459 * @see #obtainStyledAttributes(int[]) 1460 * @see #obtainStyledAttributes(int, int[]) 1461 */ 1462 public TypedArray obtainStyledAttributes(AttributeSet set, 1463 int[] attrs, int defStyleAttr, int defStyleRes) { 1464 final int len = attrs.length; 1465 final TypedArray array = TypedArray.obtain(Resources.this, len); 1466 1467 // XXX note that for now we only work with compiled XML files. 1468 // To support generic XML files we will need to manually parse 1469 // out the attributes from the XML file (applying type information 1470 // contained in the resources and such). 1471 final XmlBlock.Parser parser = (XmlBlock.Parser)set; 1472 AssetManager.applyStyle(mTheme, defStyleAttr, defStyleRes, 1473 parser != null ? parser.mParseState : 0, attrs, array.mData, array.mIndices); 1474 1475 array.mTheme = this; 1476 array.mXml = parser; 1477 1478 if (false) { 1479 int[] data = array.mData; 1480 1481 System.out.println("Attributes:"); 1482 String s = " Attrs:"; 1483 int i; 1484 for (i=0; i<set.getAttributeCount(); i++) { 1485 s = s + " " + set.getAttributeName(i); 1486 int id = set.getAttributeNameResource(i); 1487 if (id != 0) { 1488 s = s + "(0x" + Integer.toHexString(id) + ")"; 1489 } 1490 s = s + "=" + set.getAttributeValue(i); 1491 } 1492 System.out.println(s); 1493 s = " Found:"; 1494 TypedValue value = new TypedValue(); 1495 for (i=0; i<attrs.length; i++) { 1496 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1497 value.type = data[d+AssetManager.STYLE_TYPE]; 1498 value.data = data[d+AssetManager.STYLE_DATA]; 1499 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1500 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1501 s = s + " 0x" + Integer.toHexString(attrs[i]) 1502 + "=" + value; 1503 } 1504 System.out.println(s); 1505 } 1506 1507 return array; 1508 } 1509 1510 /** 1511 * Retrieve the values for a set of attributes in the Theme. The 1512 * contents of the typed array are ultimately filled in by 1513 * {@link Resources#getValue}. 1514 * 1515 * @param values The base set of attribute values, must be equal 1516 * in length to {@code attrs} or {@code null}. All values 1517 * must be of type {@link TypedValue#TYPE_ATTRIBUTE}. 1518 * @param attrs The desired attributes to be retrieved. 1519 * @return Returns a TypedArray holding an array of the attribute 1520 * values. Be sure to call {@link TypedArray#recycle()} 1521 * when done with it. 1522 * @hide 1523 */ 1524 public TypedArray resolveAttributes(int[] values, int[] attrs) { 1525 final int len = attrs.length; 1526 if (values != null && len != values.length) { 1527 throw new IllegalArgumentException( 1528 "Base attribute values must be null or the same length as attrs"); 1529 } 1530 1531 final TypedArray array = TypedArray.obtain(Resources.this, len); 1532 AssetManager.resolveAttrs(mTheme, 0, 0, values, attrs, array.mData, array.mIndices); 1533 array.mTheme = this; 1534 array.mXml = null; 1535 1536 return array; 1537 } 1538 1539 /** 1540 * Retrieve the value of an attribute in the Theme. The contents of 1541 * <var>outValue</var> are ultimately filled in by 1542 * {@link Resources#getValue}. 1543 * 1544 * @param resid The resource identifier of the desired theme 1545 * attribute. 1546 * @param outValue Filled in with the ultimate resource value supplied 1547 * by the attribute. 1548 * @param resolveRefs If true, resource references will be walked; if 1549 * false, <var>outValue</var> may be a 1550 * TYPE_REFERENCE. In either case, it will never 1551 * be a TYPE_ATTRIBUTE. 1552 * 1553 * @return boolean Returns true if the attribute was found and 1554 * <var>outValue</var> is valid, else false. 1555 */ 1556 public boolean resolveAttribute(int resid, TypedValue outValue, boolean resolveRefs) { 1557 boolean got = mAssets.getThemeValue(mTheme, resid, outValue, resolveRefs); 1558 if (false) { 1559 System.out.println( 1560 "resolveAttribute #" + Integer.toHexString(resid) 1561 + " got=" + got + ", type=0x" + Integer.toHexString(outValue.type) 1562 + ", data=0x" + Integer.toHexString(outValue.data)); 1563 } 1564 return got; 1565 } 1566 1567 /** 1568 * Returns the resources to which this theme belongs. 1569 * 1570 * @return Resources to which this theme belongs. 1571 */ 1572 public Resources getResources() { 1573 return Resources.this; 1574 } 1575 1576 /** 1577 * Return a drawable object associated with a particular resource ID 1578 * and styled for the Theme. 1579 * 1580 * @param id The desired resource identifier, as generated by the aapt 1581 * tool. This integer encodes the package, type, and resource 1582 * entry. The value 0 is an invalid identifier. 1583 * @return Drawable An object that can be used to draw this resource. 1584 * @throws NotFoundException Throws NotFoundException if the given ID 1585 * does not exist. 1586 */ 1587 public Drawable getDrawable(int id) throws NotFoundException { 1588 return Resources.this.getDrawable(id, this); 1589 } 1590 1591 /** 1592 * Print contents of this theme out to the log. For debugging only. 1593 * 1594 * @param priority The log priority to use. 1595 * @param tag The log tag to use. 1596 * @param prefix Text to prefix each line printed. 1597 */ 1598 public void dump(int priority, String tag, String prefix) { 1599 AssetManager.dumpTheme(mTheme, priority, tag, prefix); 1600 } 1601 1602 @Override 1603 protected void finalize() throws Throwable { 1604 super.finalize(); 1605 mAssets.releaseTheme(mTheme); 1606 } 1607 1608 /*package*/ Theme() { 1609 mAssets = Resources.this.mAssets; 1610 mTheme = mAssets.createTheme(); 1611 } 1612 1613 @SuppressWarnings("hiding") 1614 private final AssetManager mAssets; 1615 private final long mTheme; 1616 1617 /** Resource identifier for the theme. */ 1618 private int mThemeResId = 0; 1619 1620 /** Unique key for the series of styles applied to this theme. */ 1621 private String mKey = ""; 1622 1623 // Needed by layoutlib. 1624 /*package*/ long getNativeTheme() { 1625 return mTheme; 1626 } 1627 1628 /*package*/ int getAppliedStyleResId() { 1629 return mThemeResId; 1630 } 1631 1632 /*package*/ String getKey() { 1633 return mKey; 1634 } 1635 } 1636 1637 /** 1638 * Generate a new Theme object for this set of Resources. It initially 1639 * starts out empty. 1640 * 1641 * @return Theme The newly created Theme container. 1642 */ 1643 public final Theme newTheme() { 1644 return new Theme(); 1645 } 1646 1647 /** 1648 * Retrieve a set of basic attribute values from an AttributeSet, not 1649 * performing styling of them using a theme and/or style resources. 1650 * 1651 * @param set The current attribute values to retrieve. 1652 * @param attrs The specific attributes to be retrieved. 1653 * @return Returns a TypedArray holding an array of the attribute values. 1654 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1655 * when done with it. 1656 * 1657 * @see Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 1658 */ 1659 public TypedArray obtainAttributes(AttributeSet set, int[] attrs) { 1660 int len = attrs.length; 1661 TypedArray array = TypedArray.obtain(this, len); 1662 1663 // XXX note that for now we only work with compiled XML files. 1664 // To support generic XML files we will need to manually parse 1665 // out the attributes from the XML file (applying type information 1666 // contained in the resources and such). 1667 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1668 mAssets.retrieveAttributes(parser.mParseState, attrs, 1669 array.mData, array.mIndices); 1670 1671 array.mXml = parser; 1672 1673 return array; 1674 } 1675 1676 /** 1677 * Store the newly updated configuration. 1678 */ 1679 public void updateConfiguration(Configuration config, 1680 DisplayMetrics metrics) { 1681 updateConfiguration(config, metrics, null); 1682 } 1683 1684 /** 1685 * @hide 1686 */ 1687 public void updateConfiguration(Configuration config, 1688 DisplayMetrics metrics, CompatibilityInfo compat) { 1689 synchronized (mAccessLock) { 1690 if (false) { 1691 Slog.i(TAG, "**** Updating config of " + this + ": old config is " 1692 + mConfiguration + " old compat is " + mCompatibilityInfo); 1693 Slog.i(TAG, "**** Updating config of " + this + ": new config is " 1694 + config + " new compat is " + compat); 1695 } 1696 if (compat != null) { 1697 mCompatibilityInfo = compat; 1698 } 1699 if (metrics != null) { 1700 mMetrics.setTo(metrics); 1701 } 1702 // NOTE: We should re-arrange this code to create a Display 1703 // with the CompatibilityInfo that is used everywhere we deal 1704 // with the display in relation to this app, rather than 1705 // doing the conversion here. This impl should be okay because 1706 // we make sure to return a compatible display in the places 1707 // where there are public APIs to retrieve the display... but 1708 // it would be cleaner and more maintainble to just be 1709 // consistently dealing with a compatible display everywhere in 1710 // the framework. 1711 mCompatibilityInfo.applyToDisplayMetrics(mMetrics); 1712 1713 int configChanges = 0xfffffff; 1714 if (config != null) { 1715 mTmpConfig.setTo(config); 1716 int density = config.densityDpi; 1717 if (density == Configuration.DENSITY_DPI_UNDEFINED) { 1718 density = mMetrics.noncompatDensityDpi; 1719 } 1720 1721 mCompatibilityInfo.applyToConfiguration(density, mTmpConfig); 1722 1723 if (mTmpConfig.locale == null) { 1724 mTmpConfig.locale = Locale.getDefault(); 1725 mTmpConfig.setLayoutDirection(mTmpConfig.locale); 1726 } 1727 configChanges = mConfiguration.updateFrom(mTmpConfig); 1728 configChanges = ActivityInfo.activityInfoConfigToNative(configChanges); 1729 } 1730 if (mConfiguration.locale == null) { 1731 mConfiguration.locale = Locale.getDefault(); 1732 mConfiguration.setLayoutDirection(mConfiguration.locale); 1733 } 1734 if (mConfiguration.densityDpi != Configuration.DENSITY_DPI_UNDEFINED) { 1735 mMetrics.densityDpi = mConfiguration.densityDpi; 1736 mMetrics.density = mConfiguration.densityDpi * DisplayMetrics.DENSITY_DEFAULT_SCALE; 1737 } 1738 mMetrics.scaledDensity = mMetrics.density * mConfiguration.fontScale; 1739 1740 String locale = null; 1741 if (mConfiguration.locale != null) { 1742 locale = adjustLanguageTag(mConfiguration.locale.toLanguageTag()); 1743 } 1744 int width, height; 1745 if (mMetrics.widthPixels >= mMetrics.heightPixels) { 1746 width = mMetrics.widthPixels; 1747 height = mMetrics.heightPixels; 1748 } else { 1749 //noinspection SuspiciousNameCombination 1750 width = mMetrics.heightPixels; 1751 //noinspection SuspiciousNameCombination 1752 height = mMetrics.widthPixels; 1753 } 1754 int keyboardHidden = mConfiguration.keyboardHidden; 1755 if (keyboardHidden == Configuration.KEYBOARDHIDDEN_NO 1756 && mConfiguration.hardKeyboardHidden 1757 == Configuration.HARDKEYBOARDHIDDEN_YES) { 1758 keyboardHidden = Configuration.KEYBOARDHIDDEN_SOFT; 1759 } 1760 mAssets.setConfiguration(mConfiguration.mcc, mConfiguration.mnc, 1761 locale, mConfiguration.orientation, 1762 mConfiguration.touchscreen, 1763 mConfiguration.densityDpi, mConfiguration.keyboard, 1764 keyboardHidden, mConfiguration.navigation, width, height, 1765 mConfiguration.smallestScreenWidthDp, 1766 mConfiguration.screenWidthDp, mConfiguration.screenHeightDp, 1767 mConfiguration.screenLayout, mConfiguration.uiMode, 1768 Build.VERSION.RESOURCES_SDK_INT); 1769 1770 if (DEBUG_CONFIG) { 1771 Slog.i(TAG, "**** Updating config of " + this + ": final config is " + mConfiguration 1772 + " final compat is " + mCompatibilityInfo); 1773 } 1774 1775 clearDrawableCachesLocked(mDrawableCache, configChanges); 1776 clearDrawableCachesLocked(mColorDrawableCache, configChanges); 1777 1778 mColorStateListCache.clear(); 1779 1780 flushLayoutCache(); 1781 } 1782 synchronized (sSync) { 1783 if (mPluralRule != null) { 1784 mPluralRule = NativePluralRules.forLocale(config.locale); 1785 } 1786 } 1787 } 1788 1789 private void clearDrawableCachesLocked( 1790 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 1791 int configChanges) { 1792 final int N = caches.size(); 1793 for (int i = 0; i < N; i++) { 1794 clearDrawableCacheLocked(caches.valueAt(i), configChanges); 1795 } 1796 } 1797 1798 private void clearDrawableCacheLocked( 1799 LongSparseArray<WeakReference<ConstantState>> cache, int configChanges) { 1800 if (DEBUG_CONFIG) { 1801 Log.d(TAG, "Cleaning up drawables config changes: 0x" 1802 + Integer.toHexString(configChanges)); 1803 } 1804 final int N = cache.size(); 1805 for (int i = 0; i < N; i++) { 1806 final WeakReference<ConstantState> ref = cache.valueAt(i); 1807 if (ref != null) { 1808 final ConstantState cs = ref.get(); 1809 if (cs != null) { 1810 if (Configuration.needNewResources( 1811 configChanges, cs.getChangingConfigurations())) { 1812 if (DEBUG_CONFIG) { 1813 Log.d(TAG, "FLUSHING #0x" 1814 + Long.toHexString(cache.keyAt(i)) 1815 + " / " + cs + " with changes: 0x" 1816 + Integer.toHexString(cs.getChangingConfigurations())); 1817 } 1818 cache.setValueAt(i, null); 1819 } else if (DEBUG_CONFIG) { 1820 Log.d(TAG, "(Keeping #0x" 1821 + Long.toHexString(cache.keyAt(i)) 1822 + " / " + cs + " with changes: 0x" 1823 + Integer.toHexString(cs.getChangingConfigurations()) 1824 + ")"); 1825 } 1826 } 1827 } 1828 } 1829 } 1830 1831 /** 1832 * {@code Locale.toLanguageTag} will transform the obsolete (and deprecated) 1833 * language codes "in", "ji" and "iw" to "id", "yi" and "he" respectively. 1834 * 1835 * All released versions of android prior to "L" used the deprecated language 1836 * tags, so we will need to support them for backwards compatibility. 1837 * 1838 * Note that this conversion needs to take place *after* the call to 1839 * {@code toLanguageTag} because that will convert all the deprecated codes to 1840 * the new ones, even if they're set manually. 1841 */ 1842 private static String adjustLanguageTag(String languageTag) { 1843 final int separator = languageTag.indexOf('-'); 1844 final String language; 1845 final String remainder; 1846 1847 if (separator == -1) { 1848 language = languageTag; 1849 remainder = ""; 1850 } else { 1851 language = languageTag.substring(0, separator); 1852 remainder = languageTag.substring(separator); 1853 } 1854 1855 return Locale.adjustLanguageCode(language) + remainder; 1856 } 1857 1858 /** 1859 * Update the system resources configuration if they have previously 1860 * been initialized. 1861 * 1862 * @hide 1863 */ 1864 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics, 1865 CompatibilityInfo compat) { 1866 if (mSystem != null) { 1867 mSystem.updateConfiguration(config, metrics, compat); 1868 //Log.i(TAG, "Updated system resources " + mSystem 1869 // + ": " + mSystem.getConfiguration()); 1870 } 1871 } 1872 1873 /** 1874 * Return the current display metrics that are in effect for this resource 1875 * object. The returned object should be treated as read-only. 1876 * 1877 * @return The resource's current display metrics. 1878 */ 1879 public DisplayMetrics getDisplayMetrics() { 1880 if (DEBUG_CONFIG) Slog.v(TAG, "Returning DisplayMetrics: " + mMetrics.widthPixels 1881 + "x" + mMetrics.heightPixels + " " + mMetrics.density); 1882 return mMetrics; 1883 } 1884 1885 /** 1886 * Return the current configuration that is in effect for this resource 1887 * object. The returned object should be treated as read-only. 1888 * 1889 * @return The resource's current configuration. 1890 */ 1891 public Configuration getConfiguration() { 1892 return mConfiguration; 1893 } 1894 1895 /** 1896 * Return the compatibility mode information for the application. 1897 * The returned object should be treated as read-only. 1898 * 1899 * @return compatibility info. 1900 * @hide 1901 */ 1902 public CompatibilityInfo getCompatibilityInfo() { 1903 return mCompatibilityInfo; 1904 } 1905 1906 /** 1907 * This is just for testing. 1908 * @hide 1909 */ 1910 public void setCompatibilityInfo(CompatibilityInfo ci) { 1911 if (ci != null) { 1912 mCompatibilityInfo = ci; 1913 updateConfiguration(mConfiguration, mMetrics); 1914 } 1915 } 1916 1917 /** 1918 * Return a resource identifier for the given resource name. A fully 1919 * qualified resource name is of the form "package:type/entry". The first 1920 * two components (package and type) are optional if defType and 1921 * defPackage, respectively, are specified here. 1922 * 1923 * <p>Note: use of this function is discouraged. It is much more 1924 * efficient to retrieve resources by identifier than by name. 1925 * 1926 * @param name The name of the desired resource. 1927 * @param defType Optional default resource type to find, if "type/" is 1928 * not included in the name. Can be null to require an 1929 * explicit type. 1930 * @param defPackage Optional default package to find, if "package:" is 1931 * not included in the name. Can be null to require an 1932 * explicit package. 1933 * 1934 * @return int The associated resource identifier. Returns 0 if no such 1935 * resource was found. (0 is not a valid resource ID.) 1936 */ 1937 public int getIdentifier(String name, String defType, String defPackage) { 1938 if (name == null) { 1939 throw new NullPointerException("name is null"); 1940 } 1941 try { 1942 return Integer.parseInt(name); 1943 } catch (Exception e) { 1944 // Ignore 1945 } 1946 return mAssets.getResourceIdentifier(name, defType, defPackage); 1947 } 1948 1949 /** 1950 * Return true if given resource identifier includes a package. 1951 * 1952 * @hide 1953 */ 1954 public static boolean resourceHasPackage(int resid) { 1955 return (resid >>> 24) != 0; 1956 } 1957 1958 /** 1959 * Return the full name for a given resource identifier. This name is 1960 * a single string of the form "package:type/entry". 1961 * 1962 * @param resid The resource identifier whose name is to be retrieved. 1963 * 1964 * @return A string holding the name of the resource. 1965 * 1966 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1967 * 1968 * @see #getResourcePackageName 1969 * @see #getResourceTypeName 1970 * @see #getResourceEntryName 1971 */ 1972 public String getResourceName(int resid) throws NotFoundException { 1973 String str = mAssets.getResourceName(resid); 1974 if (str != null) return str; 1975 throw new NotFoundException("Unable to find resource ID #0x" 1976 + Integer.toHexString(resid)); 1977 } 1978 1979 /** 1980 * Return the package name for a given resource identifier. 1981 * 1982 * @param resid The resource identifier whose package name is to be 1983 * retrieved. 1984 * 1985 * @return A string holding the package name of the resource. 1986 * 1987 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1988 * 1989 * @see #getResourceName 1990 */ 1991 public String getResourcePackageName(int resid) throws NotFoundException { 1992 String str = mAssets.getResourcePackageName(resid); 1993 if (str != null) return str; 1994 throw new NotFoundException("Unable to find resource ID #0x" 1995 + Integer.toHexString(resid)); 1996 } 1997 1998 /** 1999 * Return the type name for a given resource identifier. 2000 * 2001 * @param resid The resource identifier whose type name is to be 2002 * retrieved. 2003 * 2004 * @return A string holding the type name of the resource. 2005 * 2006 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2007 * 2008 * @see #getResourceName 2009 */ 2010 public String getResourceTypeName(int resid) throws NotFoundException { 2011 String str = mAssets.getResourceTypeName(resid); 2012 if (str != null) return str; 2013 throw new NotFoundException("Unable to find resource ID #0x" 2014 + Integer.toHexString(resid)); 2015 } 2016 2017 /** 2018 * Return the entry name for a given resource identifier. 2019 * 2020 * @param resid The resource identifier whose entry name is to be 2021 * retrieved. 2022 * 2023 * @return A string holding the entry name of the resource. 2024 * 2025 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 2026 * 2027 * @see #getResourceName 2028 */ 2029 public String getResourceEntryName(int resid) throws NotFoundException { 2030 String str = mAssets.getResourceEntryName(resid); 2031 if (str != null) return str; 2032 throw new NotFoundException("Unable to find resource ID #0x" 2033 + Integer.toHexString(resid)); 2034 } 2035 2036 /** 2037 * Parse a series of {@link android.R.styleable#Extra <extra>} tags from 2038 * an XML file. You call this when you are at the parent tag of the 2039 * extra tags, and it will return once all of the child tags have been parsed. 2040 * This will call {@link #parseBundleExtra} for each extra tag encountered. 2041 * 2042 * @param parser The parser from which to retrieve the extras. 2043 * @param outBundle A Bundle in which to place all parsed extras. 2044 * @throws XmlPullParserException 2045 * @throws IOException 2046 */ 2047 public void parseBundleExtras(XmlResourceParser parser, Bundle outBundle) 2048 throws XmlPullParserException, IOException { 2049 int outerDepth = parser.getDepth(); 2050 int type; 2051 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 2052 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 2053 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 2054 continue; 2055 } 2056 2057 String nodeName = parser.getName(); 2058 if (nodeName.equals("extra")) { 2059 parseBundleExtra("extra", parser, outBundle); 2060 XmlUtils.skipCurrentTag(parser); 2061 2062 } else { 2063 XmlUtils.skipCurrentTag(parser); 2064 } 2065 } 2066 } 2067 2068 /** 2069 * Parse a name/value pair out of an XML tag holding that data. The 2070 * AttributeSet must be holding the data defined by 2071 * {@link android.R.styleable#Extra}. The following value types are supported: 2072 * <ul> 2073 * <li> {@link TypedValue#TYPE_STRING}: 2074 * {@link Bundle#putCharSequence Bundle.putCharSequence()} 2075 * <li> {@link TypedValue#TYPE_INT_BOOLEAN}: 2076 * {@link Bundle#putCharSequence Bundle.putBoolean()} 2077 * <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}: 2078 * {@link Bundle#putCharSequence Bundle.putBoolean()} 2079 * <li> {@link TypedValue#TYPE_FLOAT}: 2080 * {@link Bundle#putCharSequence Bundle.putFloat()} 2081 * </ul> 2082 * 2083 * @param tagName The name of the tag these attributes come from; this is 2084 * only used for reporting error messages. 2085 * @param attrs The attributes from which to retrieve the name/value pair. 2086 * @param outBundle The Bundle in which to place the parsed value. 2087 * @throws XmlPullParserException If the attributes are not valid. 2088 */ 2089 public void parseBundleExtra(String tagName, AttributeSet attrs, 2090 Bundle outBundle) throws XmlPullParserException { 2091 TypedArray sa = obtainAttributes(attrs, 2092 com.android.internal.R.styleable.Extra); 2093 2094 String name = sa.getString( 2095 com.android.internal.R.styleable.Extra_name); 2096 if (name == null) { 2097 sa.recycle(); 2098 throw new XmlPullParserException("<" + tagName 2099 + "> requires an android:name attribute at " 2100 + attrs.getPositionDescription()); 2101 } 2102 2103 TypedValue v = sa.peekValue( 2104 com.android.internal.R.styleable.Extra_value); 2105 if (v != null) { 2106 if (v.type == TypedValue.TYPE_STRING) { 2107 CharSequence cs = v.coerceToString(); 2108 outBundle.putCharSequence(name, cs); 2109 } else if (v.type == TypedValue.TYPE_INT_BOOLEAN) { 2110 outBundle.putBoolean(name, v.data != 0); 2111 } else if (v.type >= TypedValue.TYPE_FIRST_INT 2112 && v.type <= TypedValue.TYPE_LAST_INT) { 2113 outBundle.putInt(name, v.data); 2114 } else if (v.type == TypedValue.TYPE_FLOAT) { 2115 outBundle.putFloat(name, v.getFloat()); 2116 } else { 2117 sa.recycle(); 2118 throw new XmlPullParserException("<" + tagName 2119 + "> only supports string, integer, float, color, and boolean at " 2120 + attrs.getPositionDescription()); 2121 } 2122 } else { 2123 sa.recycle(); 2124 throw new XmlPullParserException("<" + tagName 2125 + "> requires an android:value or android:resource attribute at " 2126 + attrs.getPositionDescription()); 2127 } 2128 2129 sa.recycle(); 2130 } 2131 2132 /** 2133 * Retrieve underlying AssetManager storage for these resources. 2134 */ 2135 public final AssetManager getAssets() { 2136 return mAssets; 2137 } 2138 2139 /** 2140 * Call this to remove all cached loaded layout resources from the 2141 * Resources object. Only intended for use with performance testing 2142 * tools. 2143 */ 2144 public final void flushLayoutCache() { 2145 synchronized (mCachedXmlBlockIds) { 2146 // First see if this block is in our cache. 2147 final int num = mCachedXmlBlockIds.length; 2148 for (int i=0; i<num; i++) { 2149 mCachedXmlBlockIds[i] = -0; 2150 XmlBlock oldBlock = mCachedXmlBlocks[i]; 2151 if (oldBlock != null) { 2152 oldBlock.close(); 2153 } 2154 mCachedXmlBlocks[i] = null; 2155 } 2156 } 2157 } 2158 2159 /** 2160 * Start preloading of resource data using this Resources object. Only 2161 * for use by the zygote process for loading common system resources. 2162 * {@hide} 2163 */ 2164 public final void startPreloading() { 2165 synchronized (sSync) { 2166 if (sPreloaded) { 2167 throw new IllegalStateException("Resources already preloaded"); 2168 } 2169 sPreloaded = true; 2170 mPreloading = true; 2171 sPreloadedDensity = DisplayMetrics.DENSITY_DEVICE; 2172 mConfiguration.densityDpi = sPreloadedDensity; 2173 updateConfiguration(null, null); 2174 } 2175 } 2176 2177 /** 2178 * Called by zygote when it is done preloading resources, to change back 2179 * to normal Resources operation. 2180 */ 2181 public final void finishPreloading() { 2182 if (mPreloading) { 2183 mPreloading = false; 2184 flushLayoutCache(); 2185 } 2186 } 2187 2188 /** 2189 * @hide 2190 */ 2191 public LongSparseArray<ConstantState> getPreloadedDrawables() { 2192 return sPreloadedDrawables[0]; 2193 } 2194 2195 private boolean verifyPreloadConfig(int changingConfigurations, int allowVarying, 2196 int resourceId, String name) { 2197 // We allow preloading of resources even if they vary by font scale (which 2198 // doesn't impact resource selection) or density (which we handle specially by 2199 // simply turning off all preloading), as well as any other configs specified 2200 // by the caller. 2201 if (((changingConfigurations&~(ActivityInfo.CONFIG_FONT_SCALE | 2202 ActivityInfo.CONFIG_DENSITY)) & ~allowVarying) != 0) { 2203 String resName; 2204 try { 2205 resName = getResourceName(resourceId); 2206 } catch (NotFoundException e) { 2207 resName = "?"; 2208 } 2209 // This should never happen in production, so we should log a 2210 // warning even if we're not debugging. 2211 Log.w(TAG, "Preloaded " + name + " resource #0x" 2212 + Integer.toHexString(resourceId) 2213 + " (" + resName + ") that varies with configuration!!"); 2214 return false; 2215 } 2216 if (TRACE_FOR_PRELOAD) { 2217 String resName; 2218 try { 2219 resName = getResourceName(resourceId); 2220 } catch (NotFoundException e) { 2221 resName = "?"; 2222 } 2223 Log.w(TAG, "Preloading " + name + " resource #0x" 2224 + Integer.toHexString(resourceId) 2225 + " (" + resName + ")"); 2226 } 2227 return true; 2228 } 2229 2230 /*package*/ Drawable loadDrawable(TypedValue value, int id, Theme theme) throws NotFoundException { 2231 if (TRACE_FOR_PRELOAD) { 2232 // Log only framework resources 2233 if ((id >>> 24) == 0x1) { 2234 final String name = getResourceName(id); 2235 if (name != null) { 2236 Log.d("PreloadDrawable", name); 2237 } 2238 } 2239 } 2240 2241 final boolean isColorDrawable; 2242 final ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches; 2243 final long key; 2244 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT 2245 && value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2246 isColorDrawable = true; 2247 caches = mColorDrawableCache; 2248 key = value.data; 2249 } else { 2250 isColorDrawable = false; 2251 caches = mDrawableCache; 2252 key = (((long) value.assetCookie) << 32) | value.data; 2253 } 2254 2255 // First, check whether we have a cached version of this drawable 2256 // that was inflated against the specified theme. 2257 if (!mPreloading) { 2258 final Drawable cachedDrawable = getCachedDrawable(caches, key, theme); 2259 if (cachedDrawable != null) { 2260 return cachedDrawable; 2261 } 2262 } 2263 2264 // Next, check preloaded drawables. These are unthemed but may have 2265 // themeable attributes. 2266 final ConstantState cs; 2267 if (isColorDrawable) { 2268 cs = sPreloadedColorDrawables.get(key); 2269 } else { 2270 cs = sPreloadedDrawables[mConfiguration.getLayoutDirection()].get(key); 2271 } 2272 2273 final Drawable dr; 2274 if (cs != null) { 2275 dr = cs.newDrawable(this, theme); 2276 } else if (isColorDrawable) { 2277 dr = new ColorDrawable(value.data); 2278 } else { 2279 dr = loadDrawableForCookie(value, id, theme); 2280 } 2281 2282 // If we were able to obtain a drawable, store it in the appropriate 2283 // cache (either preload or themed). 2284 if (dr != null) { 2285 dr.setChangingConfigurations(value.changingConfigurations); 2286 cacheDrawable(value, theme, isColorDrawable, caches, key, dr); 2287 } 2288 2289 return dr; 2290 } 2291 2292 private void cacheDrawable(TypedValue value, Theme theme, boolean isColorDrawable, 2293 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 2294 long key, Drawable dr) { 2295 final ConstantState cs = dr.getConstantState(); 2296 if (cs == null) { 2297 return; 2298 } 2299 2300 if (mPreloading) { 2301 // Preloaded drawables never have a theme, but may be themeable. 2302 final int changingConfigs = cs.getChangingConfigurations(); 2303 if (isColorDrawable) { 2304 if (verifyPreloadConfig(changingConfigs, 0, value.resourceId, "drawable")) { 2305 sPreloadedColorDrawables.put(key, cs); 2306 } 2307 } else { 2308 if (verifyPreloadConfig( 2309 changingConfigs, LAYOUT_DIR_CONFIG, value.resourceId, "drawable")) { 2310 if ((changingConfigs & LAYOUT_DIR_CONFIG) == 0) { 2311 // If this resource does not vary based on layout direction, 2312 // we can put it in all of the preload maps. 2313 sPreloadedDrawables[0].put(key, cs); 2314 sPreloadedDrawables[1].put(key, cs); 2315 } else { 2316 // Otherwise, only in the layout dir we loaded it for. 2317 sPreloadedDrawables[mConfiguration.getLayoutDirection()].put(key, cs); 2318 } 2319 } 2320 } 2321 } else { 2322 synchronized (mAccessLock) { 2323 final String themeKey = theme == null ? "" : theme.mKey; 2324 LongSparseArray<WeakReference<ConstantState>> themedCache = caches.get(themeKey); 2325 if (themedCache == null) { 2326 themedCache = new LongSparseArray<WeakReference<ConstantState>>(1); 2327 caches.put(themeKey, themedCache); 2328 } 2329 themedCache.put(key, new WeakReference<ConstantState>(cs)); 2330 } 2331 } 2332 } 2333 2334 /** 2335 * Loads a drawable from XML or resources stream. 2336 */ 2337 private Drawable loadDrawableForCookie(TypedValue value, int id, Theme theme) { 2338 if (value.string == null) { 2339 throw new NotFoundException("Resource \"" + getResourceName(id) + "\" (" 2340 + Integer.toHexString(id) + ") is not a Drawable (color or path): " + value); 2341 } 2342 2343 final String file = value.string.toString(); 2344 2345 if (TRACE_FOR_MISS_PRELOAD) { 2346 // Log only framework resources 2347 if ((id >>> 24) == 0x1) { 2348 final String name = getResourceName(id); 2349 if (name != null) { 2350 Log.d(TAG, "Loading framework drawable #" + Integer.toHexString(id) 2351 + ": " + name + " at " + file); 2352 } 2353 } 2354 } 2355 2356 if (DEBUG_LOAD) { 2357 Log.v(TAG, "Loading drawable for cookie " + value.assetCookie + ": " + file); 2358 } 2359 2360 final Drawable dr; 2361 2362 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2363 try { 2364 if (file.endsWith(".xml")) { 2365 final XmlResourceParser rp = loadXmlResourceParser( 2366 file, id, value.assetCookie, "drawable"); 2367 dr = Drawable.createFromXml(this, rp, theme); 2368 rp.close(); 2369 } else { 2370 final InputStream is = mAssets.openNonAsset( 2371 value.assetCookie, file, AssetManager.ACCESS_STREAMING); 2372 dr = Drawable.createFromResourceStream(this, value, is, file, null); 2373 is.close(); 2374 } 2375 } catch (Exception e) { 2376 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2377 final NotFoundException rnf = new NotFoundException( 2378 "File " + file + " from drawable resource ID #0x" + Integer.toHexString(id)); 2379 rnf.initCause(e); 2380 throw rnf; 2381 } 2382 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2383 2384 return dr; 2385 } 2386 2387 private Drawable getCachedDrawable( 2388 ArrayMap<String, LongSparseArray<WeakReference<ConstantState>>> caches, 2389 long key, Theme theme) { 2390 synchronized (mAccessLock) { 2391 final String themeKey = theme != null ? theme.mKey : ""; 2392 final LongSparseArray<WeakReference<ConstantState>> themedCache = caches.get(themeKey); 2393 if (themedCache != null) { 2394 final Drawable themedDrawable = getCachedDrawableLocked(themedCache, key); 2395 if (themedDrawable != null) { 2396 return themedDrawable; 2397 } 2398 } 2399 2400 // No cached drawable, we'll need to create a new one. 2401 return null; 2402 } 2403 } 2404 2405 private ConstantState getConstantStateLocked( 2406 LongSparseArray<WeakReference<ConstantState>> drawableCache, long key) { 2407 final WeakReference<ConstantState> wr = drawableCache.get(key); 2408 if (wr != null) { // we have the key 2409 final ConstantState entry = wr.get(); 2410 if (entry != null) { 2411 //Log.i(TAG, "Returning cached drawable @ #" + 2412 // Integer.toHexString(((Integer)key).intValue()) 2413 // + " in " + this + ": " + entry); 2414 return entry; 2415 } else { // our entry has been purged 2416 drawableCache.delete(key); 2417 } 2418 } 2419 return null; 2420 } 2421 2422 private Drawable getCachedDrawableLocked( 2423 LongSparseArray<WeakReference<ConstantState>> drawableCache, long key) { 2424 final ConstantState entry = getConstantStateLocked(drawableCache, key); 2425 if (entry != null) { 2426 return entry.newDrawable(this); 2427 } 2428 return null; 2429 } 2430 2431 /*package*/ ColorStateList loadColorStateList(TypedValue value, int id) 2432 throws NotFoundException { 2433 if (TRACE_FOR_PRELOAD) { 2434 // Log only framework resources 2435 if ((id >>> 24) == 0x1) { 2436 final String name = getResourceName(id); 2437 if (name != null) android.util.Log.d("PreloadColorStateList", name); 2438 } 2439 } 2440 2441 final long key = (((long) value.assetCookie) << 32) | value.data; 2442 2443 ColorStateList csl; 2444 2445 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2446 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2447 2448 csl = sPreloadedColorStateLists.get(key); 2449 if (csl != null) { 2450 return csl; 2451 } 2452 2453 csl = ColorStateList.valueOf(value.data); 2454 if (mPreloading) { 2455 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2456 "color")) { 2457 sPreloadedColorStateLists.put(key, csl); 2458 } 2459 } 2460 2461 return csl; 2462 } 2463 2464 csl = getCachedColorStateList(key); 2465 if (csl != null) { 2466 return csl; 2467 } 2468 2469 csl = sPreloadedColorStateLists.get(key); 2470 if (csl != null) { 2471 return csl; 2472 } 2473 2474 if (value.string == null) { 2475 throw new NotFoundException( 2476 "Resource is not a ColorStateList (color or path): " + value); 2477 } 2478 2479 final String file = value.string.toString(); 2480 2481 if (file.endsWith(".xml")) { 2482 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2483 try { 2484 final XmlResourceParser rp = loadXmlResourceParser( 2485 file, id, value.assetCookie, "colorstatelist"); 2486 csl = ColorStateList.createFromXml(this, rp); 2487 rp.close(); 2488 } catch (Exception e) { 2489 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2490 NotFoundException rnf = new NotFoundException( 2491 "File " + file + " from color state list resource ID #0x" 2492 + Integer.toHexString(id)); 2493 rnf.initCause(e); 2494 throw rnf; 2495 } 2496 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2497 } else { 2498 throw new NotFoundException( 2499 "File " + file + " from drawable resource ID #0x" 2500 + Integer.toHexString(id) + ": .xml extension required"); 2501 } 2502 2503 if (csl != null) { 2504 if (mPreloading) { 2505 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2506 "color")) { 2507 sPreloadedColorStateLists.put(key, csl); 2508 } 2509 } else { 2510 synchronized (mAccessLock) { 2511 //Log.i(TAG, "Saving cached color state list @ #" + 2512 // Integer.toHexString(key.intValue()) 2513 // + " in " + this + ": " + csl); 2514 mColorStateListCache.put(key, new WeakReference<ColorStateList>(csl)); 2515 } 2516 } 2517 } 2518 2519 return csl; 2520 } 2521 2522 private ColorStateList getCachedColorStateList(long key) { 2523 synchronized (mAccessLock) { 2524 WeakReference<ColorStateList> wr = mColorStateListCache.get(key); 2525 if (wr != null) { // we have the key 2526 ColorStateList entry = wr.get(); 2527 if (entry != null) { 2528 //Log.i(TAG, "Returning cached color state list @ #" + 2529 // Integer.toHexString(((Integer)key).intValue()) 2530 // + " in " + this + ": " + entry); 2531 return entry; 2532 } else { // our entry has been purged 2533 mColorStateListCache.delete(key); 2534 } 2535 } 2536 } 2537 return null; 2538 } 2539 2540 /*package*/ XmlResourceParser loadXmlResourceParser(int id, String type) 2541 throws NotFoundException { 2542 synchronized (mAccessLock) { 2543 TypedValue value = mTmpValue; 2544 if (value == null) { 2545 mTmpValue = value = new TypedValue(); 2546 } 2547 getValue(id, value, true); 2548 if (value.type == TypedValue.TYPE_STRING) { 2549 return loadXmlResourceParser(value.string.toString(), id, 2550 value.assetCookie, type); 2551 } 2552 throw new NotFoundException( 2553 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 2554 + Integer.toHexString(value.type) + " is not valid"); 2555 } 2556 } 2557 2558 /*package*/ XmlResourceParser loadXmlResourceParser(String file, int id, 2559 int assetCookie, String type) throws NotFoundException { 2560 if (id != 0) { 2561 try { 2562 // These may be compiled... 2563 synchronized (mCachedXmlBlockIds) { 2564 // First see if this block is in our cache. 2565 final int num = mCachedXmlBlockIds.length; 2566 for (int i=0; i<num; i++) { 2567 if (mCachedXmlBlockIds[i] == id) { 2568 //System.out.println("**** REUSING XML BLOCK! id=" 2569 // + id + ", index=" + i); 2570 return mCachedXmlBlocks[i].newParser(); 2571 } 2572 } 2573 2574 // Not in the cache, create a new block and put it at 2575 // the next slot in the cache. 2576 XmlBlock block = mAssets.openXmlBlockAsset( 2577 assetCookie, file); 2578 if (block != null) { 2579 int pos = mLastCachedXmlBlockIndex+1; 2580 if (pos >= num) pos = 0; 2581 mLastCachedXmlBlockIndex = pos; 2582 XmlBlock oldBlock = mCachedXmlBlocks[pos]; 2583 if (oldBlock != null) { 2584 oldBlock.close(); 2585 } 2586 mCachedXmlBlockIds[pos] = id; 2587 mCachedXmlBlocks[pos] = block; 2588 //System.out.println("**** CACHING NEW XML BLOCK! id=" 2589 // + id + ", index=" + pos); 2590 return block.newParser(); 2591 } 2592 } 2593 } catch (Exception e) { 2594 NotFoundException rnf = new NotFoundException( 2595 "File " + file + " from xml type " + type + " resource ID #0x" 2596 + Integer.toHexString(id)); 2597 rnf.initCause(e); 2598 throw rnf; 2599 } 2600 } 2601 2602 throw new NotFoundException( 2603 "File " + file + " from xml type " + type + " resource ID #0x" 2604 + Integer.toHexString(id)); 2605 } 2606 2607 /*package*/ void recycleCachedStyledAttributes(TypedArray attrs) { 2608 synchronized (mAccessLock) { 2609 final TypedArray cached = mCachedStyledAttributes; 2610 if (cached == null || cached.mData.length < attrs.mData.length) { 2611 mCachedStyledAttributes = attrs; 2612 } 2613 } 2614 } 2615 2616 private Resources() { 2617 mAssets = AssetManager.getSystem(); 2618 // NOTE: Intentionally leaving this uninitialized (all values set 2619 // to zero), so that anyone who tries to do something that requires 2620 // metrics will get a very wrong value. 2621 mConfiguration.setToDefaults(); 2622 mMetrics.setToDefaults(); 2623 updateConfiguration(null, null); 2624 mAssets.ensureStringBlocks(); 2625 } 2626} 2627