Resources.java revision 6090995951c6e2e4dcf38102f01793f8a94166e1
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.content.res; 18 19import com.android.internal.util.XmlUtils; 20 21import org.xmlpull.v1.XmlPullParser; 22import org.xmlpull.v1.XmlPullParserException; 23 24import android.content.pm.ActivityInfo; 25import android.graphics.Movie; 26import android.graphics.drawable.Drawable; 27import android.graphics.drawable.ColorDrawable; 28import android.graphics.drawable.Drawable.ConstantState; 29import android.os.Build; 30import android.os.Bundle; 31import android.os.IBinder; 32import android.os.Trace; 33import android.util.AttributeSet; 34import android.util.DisplayMetrics; 35import android.util.Log; 36import android.util.Slog; 37import android.util.TypedValue; 38import android.util.LongSparseArray; 39 40import java.io.IOException; 41import java.io.InputStream; 42import java.lang.ref.WeakReference; 43import java.util.Locale; 44 45import libcore.icu.NativePluralRules; 46 47/** 48 * Class for accessing an application's resources. This sits on top of the 49 * asset manager of the application (accessible through {@link #getAssets}) and 50 * provides a high-level API for getting typed data from the assets. 51 * 52 * <p>The Android resource system keeps track of all non-code assets associated with an 53 * application. You can use this class to access your application's resources. You can generally 54 * acquire the {@link android.content.res.Resources} instance associated with your application 55 * with {@link android.content.Context#getResources getResources()}.</p> 56 * 57 * <p>The Android SDK tools compile your application's resources into the application binary 58 * at build time. To use a resource, you must install it correctly in the source tree (inside 59 * your project's {@code res/} directory) and build your application. As part of the build 60 * process, the SDK tools generate symbols for each resource, which you can use in your application 61 * code to access the resources.</p> 62 * 63 * <p>Using application resources makes it easy to update various characteristics of your 64 * application without modifying code, and—by providing sets of alternative 65 * resources—enables you to optimize your application for a variety of device configurations 66 * (such as for different languages and screen sizes). This is an important aspect of developing 67 * Android applications that are compatible on different types of devices.</p> 68 * 69 * <p>For more information about using resources, see the documentation about <a 70 * href="{@docRoot}guide/topics/resources/index.html">Application Resources</a>.</p> 71 */ 72public class Resources { 73 static final String TAG = "Resources"; 74 private static final boolean DEBUG_LOAD = false; 75 private static final boolean DEBUG_CONFIG = false; 76 private static final boolean DEBUG_ATTRIBUTES_CACHE = false; 77 private static final boolean TRACE_FOR_PRELOAD = false; 78 private static final boolean TRACE_FOR_MISS_PRELOAD = false; 79 80 private static final int ID_OTHER = 0x01000004; 81 82 private static final Object sSync = new Object(); 83 /*package*/ static Resources mSystem = null; 84 85 // Information about preloaded resources. Note that they are not 86 // protected by a lock, because while preloading in zygote we are all 87 // single-threaded, and after that these are immutable. 88 private static final LongSparseArray<Drawable.ConstantState>[] sPreloadedDrawables; 89 private static final LongSparseArray<Drawable.ConstantState> sPreloadedColorDrawables 90 = new LongSparseArray<Drawable.ConstantState>(); 91 private static final LongSparseArray<ColorStateList> sPreloadedColorStateLists 92 = new LongSparseArray<ColorStateList>(); 93 94 private static boolean sPreloaded; 95 private static int sPreloadedDensity; 96 97 // These are protected by mAccessLock. 98 99 /*package*/ final Object mAccessLock = new Object(); 100 /*package*/ final Configuration mTmpConfig = new Configuration(); 101 /*package*/ TypedValue mTmpValue = new TypedValue(); 102 /*package*/ final LongSparseArray<WeakReference<Drawable.ConstantState> > mDrawableCache 103 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(0); 104 /*package*/ final LongSparseArray<WeakReference<ColorStateList> > mColorStateListCache 105 = new LongSparseArray<WeakReference<ColorStateList> >(0); 106 /*package*/ final LongSparseArray<WeakReference<Drawable.ConstantState> > mColorDrawableCache 107 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(0); 108 /*package*/ boolean mPreloading; 109 110 /*package*/ TypedArray mCachedStyledAttributes = null; 111 RuntimeException mLastRetrievedAttrs = null; 112 113 private int mLastCachedXmlBlockIndex = -1; 114 private final int[] mCachedXmlBlockIds = { 0, 0, 0, 0 }; 115 private final XmlBlock[] mCachedXmlBlocks = new XmlBlock[4]; 116 117 /*package*/ final AssetManager mAssets; 118 private final Configuration mConfiguration = new Configuration(); 119 /*package*/ final DisplayMetrics mMetrics = new DisplayMetrics(); 120 private NativePluralRules mPluralRule; 121 122 private CompatibilityInfo mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 123 private WeakReference<IBinder> mToken; 124 125 static { 126 sPreloadedDrawables = new LongSparseArray[2]; 127 sPreloadedDrawables[0] = new LongSparseArray<Drawable.ConstantState>(); 128 sPreloadedDrawables[1] = new LongSparseArray<Drawable.ConstantState>(); 129 } 130 131 /** @hide */ 132 public static int selectDefaultTheme(int curTheme, int targetSdkVersion) { 133 return selectSystemTheme(curTheme, targetSdkVersion, 134 com.android.internal.R.style.Theme, 135 com.android.internal.R.style.Theme_Holo, 136 com.android.internal.R.style.Theme_DeviceDefault); 137 } 138 139 /** @hide */ 140 public static int selectSystemTheme(int curTheme, int targetSdkVersion, 141 int orig, int holo, int deviceDefault) { 142 if (curTheme != 0) { 143 return curTheme; 144 } 145 if (targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) { 146 return orig; 147 } 148 if (targetSdkVersion < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 149 return holo; 150 } 151 return deviceDefault; 152 } 153 154 /** 155 * This exception is thrown by the resource APIs when a requested resource 156 * can not be found. 157 */ 158 public static class NotFoundException extends RuntimeException { 159 public NotFoundException() { 160 } 161 162 public NotFoundException(String name) { 163 super(name); 164 } 165 } 166 167 /** 168 * Create a new Resources object on top of an existing set of assets in an 169 * AssetManager. 170 * 171 * @param assets Previously created AssetManager. 172 * @param metrics Current display metrics to consider when 173 * selecting/computing resource values. 174 * @param config Desired device configuration to consider when 175 * selecting/computing resource values (optional). 176 */ 177 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config) { 178 this(assets, metrics, config, CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO, null); 179 } 180 181 /** 182 * Creates a new Resources object with CompatibilityInfo. 183 * 184 * @param assets Previously created AssetManager. 185 * @param metrics Current display metrics to consider when 186 * selecting/computing resource values. 187 * @param config Desired device configuration to consider when 188 * selecting/computing resource values (optional). 189 * @param compatInfo this resource's compatibility info. Must not be null. 190 * @param token The Activity token for determining stack affiliation. Usually null. 191 * @hide 192 */ 193 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config, 194 CompatibilityInfo compatInfo, IBinder token) { 195 mAssets = assets; 196 mMetrics.setToDefaults(); 197 if (compatInfo != null) { 198 mCompatibilityInfo = compatInfo; 199 } 200 mToken = new WeakReference<IBinder>(token); 201 updateConfiguration(config, metrics); 202 assets.ensureStringBlocks(); 203 } 204 205 /** 206 * Return a global shared Resources object that provides access to only 207 * system resources (no application resources), and is not configured for 208 * the current screen (can not use dimension units, does not change based 209 * on orientation, etc). 210 */ 211 public static Resources getSystem() { 212 synchronized (sSync) { 213 Resources ret = mSystem; 214 if (ret == null) { 215 ret = new Resources(); 216 mSystem = ret; 217 } 218 219 return ret; 220 } 221 } 222 223 /** 224 * Return the string value associated with a particular resource ID. The 225 * returned object will be a String if this is a plain string; it will be 226 * some other type of CharSequence if it is styled. 227 * {@more} 228 * 229 * @param id The desired resource identifier, as generated by the aapt 230 * tool. This integer encodes the package, type, and resource 231 * entry. The value 0 is an invalid identifier. 232 * 233 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 234 * 235 * @return CharSequence The string data associated with the resource, plus 236 * possibly styled text information. 237 */ 238 public CharSequence getText(int id) throws NotFoundException { 239 CharSequence res = mAssets.getResourceText(id); 240 if (res != null) { 241 return res; 242 } 243 throw new NotFoundException("String resource ID #0x" 244 + Integer.toHexString(id)); 245 } 246 247 /** 248 * Returns the character sequence necessary for grammatically correct pluralization 249 * of the given resource ID for the given quantity. 250 * Note that the character sequence is selected based solely on grammatical necessity, 251 * and that such rules differ between languages. Do not assume you know which string 252 * will be returned for a given quantity. See 253 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 254 * for more detail. 255 * 256 * @param id The desired resource identifier, as generated by the aapt 257 * tool. This integer encodes the package, type, and resource 258 * entry. The value 0 is an invalid identifier. 259 * @param quantity The number used to get the correct string for the current language's 260 * plural rules. 261 * 262 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 263 * 264 * @return CharSequence The string data associated with the resource, plus 265 * possibly styled text information. 266 */ 267 public CharSequence getQuantityText(int id, int quantity) throws NotFoundException { 268 NativePluralRules rule = getPluralRule(); 269 CharSequence res = mAssets.getResourceBagText(id, 270 attrForQuantityCode(rule.quantityForInt(quantity))); 271 if (res != null) { 272 return res; 273 } 274 res = mAssets.getResourceBagText(id, ID_OTHER); 275 if (res != null) { 276 return res; 277 } 278 throw new NotFoundException("Plural resource ID #0x" + Integer.toHexString(id) 279 + " quantity=" + quantity 280 + " item=" + stringForQuantityCode(rule.quantityForInt(quantity))); 281 } 282 283 private NativePluralRules getPluralRule() { 284 synchronized (sSync) { 285 if (mPluralRule == null) { 286 mPluralRule = NativePluralRules.forLocale(mConfiguration.locale); 287 } 288 return mPluralRule; 289 } 290 } 291 292 private static int attrForQuantityCode(int quantityCode) { 293 switch (quantityCode) { 294 case NativePluralRules.ZERO: return 0x01000005; 295 case NativePluralRules.ONE: return 0x01000006; 296 case NativePluralRules.TWO: return 0x01000007; 297 case NativePluralRules.FEW: return 0x01000008; 298 case NativePluralRules.MANY: return 0x01000009; 299 default: return ID_OTHER; 300 } 301 } 302 303 private static String stringForQuantityCode(int quantityCode) { 304 switch (quantityCode) { 305 case NativePluralRules.ZERO: return "zero"; 306 case NativePluralRules.ONE: return "one"; 307 case NativePluralRules.TWO: return "two"; 308 case NativePluralRules.FEW: return "few"; 309 case NativePluralRules.MANY: return "many"; 310 default: return "other"; 311 } 312 } 313 314 /** 315 * Return the string value associated with a particular resource ID. It 316 * will be stripped of any styled text information. 317 * {@more} 318 * 319 * @param id The desired resource identifier, as generated by the aapt 320 * tool. This integer encodes the package, type, and resource 321 * entry. The value 0 is an invalid identifier. 322 * 323 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 324 * 325 * @return String The string data associated with the resource, 326 * stripped of styled text information. 327 */ 328 public String getString(int id) throws NotFoundException { 329 CharSequence res = getText(id); 330 if (res != null) { 331 return res.toString(); 332 } 333 throw new NotFoundException("String resource ID #0x" 334 + Integer.toHexString(id)); 335 } 336 337 338 /** 339 * Return the string value associated with a particular resource ID, 340 * substituting the format arguments as defined in {@link java.util.Formatter} 341 * and {@link java.lang.String#format}. It will be stripped of any styled text 342 * information. 343 * {@more} 344 * 345 * @param id The desired resource identifier, as generated by the aapt 346 * tool. This integer encodes the package, type, and resource 347 * entry. The value 0 is an invalid identifier. 348 * 349 * @param formatArgs The format arguments that will be used for substitution. 350 * 351 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 352 * 353 * @return String The string data associated with the resource, 354 * stripped of styled text information. 355 */ 356 public String getString(int id, Object... formatArgs) throws NotFoundException { 357 String raw = getString(id); 358 return String.format(mConfiguration.locale, raw, formatArgs); 359 } 360 361 /** 362 * Formats the string necessary for grammatically correct pluralization 363 * of the given resource ID for the given quantity, using the given arguments. 364 * Note that the string is selected based solely on grammatical necessity, 365 * and that such rules differ between languages. Do not assume you know which string 366 * will be returned for a given quantity. See 367 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 368 * for more detail. 369 * 370 * <p>Substitution of format arguments works as if using 371 * {@link java.util.Formatter} and {@link java.lang.String#format}. 372 * The resulting string will be stripped of any styled text information. 373 * 374 * @param id The desired resource identifier, as generated by the aapt 375 * tool. This integer encodes the package, type, and resource 376 * entry. The value 0 is an invalid identifier. 377 * @param quantity The number used to get the correct string for the current language's 378 * plural rules. 379 * @param formatArgs The format arguments that will be used for substitution. 380 * 381 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 382 * 383 * @return String The string data associated with the resource, 384 * stripped of styled text information. 385 */ 386 public String getQuantityString(int id, int quantity, Object... formatArgs) 387 throws NotFoundException { 388 String raw = getQuantityText(id, quantity).toString(); 389 return String.format(mConfiguration.locale, raw, formatArgs); 390 } 391 392 /** 393 * Returns the string necessary for grammatically correct pluralization 394 * of the given resource ID for the given quantity. 395 * Note that the string is selected based solely on grammatical necessity, 396 * and that such rules differ between languages. Do not assume you know which string 397 * will be returned for a given quantity. See 398 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 399 * for more detail. 400 * 401 * @param id The desired resource identifier, as generated by the aapt 402 * tool. This integer encodes the package, type, and resource 403 * entry. The value 0 is an invalid identifier. 404 * @param quantity The number used to get the correct string for the current language's 405 * plural rules. 406 * 407 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 408 * 409 * @return String The string data associated with the resource, 410 * stripped of styled text information. 411 */ 412 public String getQuantityString(int id, int quantity) throws NotFoundException { 413 return getQuantityText(id, quantity).toString(); 414 } 415 416 /** 417 * Return the string value associated with a particular resource ID. The 418 * returned object will be a String if this is a plain string; it will be 419 * some other type of CharSequence if it is styled. 420 * 421 * @param id The desired resource identifier, as generated by the aapt 422 * tool. This integer encodes the package, type, and resource 423 * entry. The value 0 is an invalid identifier. 424 * 425 * @param def The default CharSequence to return. 426 * 427 * @return CharSequence The string data associated with the resource, plus 428 * possibly styled text information, or def if id is 0 or not found. 429 */ 430 public CharSequence getText(int id, CharSequence def) { 431 CharSequence res = id != 0 ? mAssets.getResourceText(id) : null; 432 return res != null ? res : def; 433 } 434 435 /** 436 * Return the styled text array associated with a particular resource ID. 437 * 438 * @param id The desired resource identifier, as generated by the aapt 439 * tool. This integer encodes the package, type, and resource 440 * entry. The value 0 is an invalid identifier. 441 * 442 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 443 * 444 * @return The styled text array associated with the resource. 445 */ 446 public CharSequence[] getTextArray(int id) throws NotFoundException { 447 CharSequence[] res = mAssets.getResourceTextArray(id); 448 if (res != null) { 449 return res; 450 } 451 throw new NotFoundException("Text array resource ID #0x" 452 + Integer.toHexString(id)); 453 } 454 455 /** 456 * Return the string array associated with a particular resource ID. 457 * 458 * @param id The desired resource identifier, as generated by the aapt 459 * tool. This integer encodes the package, type, and resource 460 * entry. The value 0 is an invalid identifier. 461 * 462 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 463 * 464 * @return The string array associated with the resource. 465 */ 466 public String[] getStringArray(int id) throws NotFoundException { 467 String[] res = mAssets.getResourceStringArray(id); 468 if (res != null) { 469 return res; 470 } 471 throw new NotFoundException("String array resource ID #0x" 472 + Integer.toHexString(id)); 473 } 474 475 /** 476 * Return the int array associated with a particular resource ID. 477 * 478 * @param id The desired resource identifier, as generated by the aapt 479 * tool. This integer encodes the package, type, and resource 480 * entry. The value 0 is an invalid identifier. 481 * 482 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 483 * 484 * @return The int array associated with the resource. 485 */ 486 public int[] getIntArray(int id) throws NotFoundException { 487 int[] res = mAssets.getArrayIntResource(id); 488 if (res != null) { 489 return res; 490 } 491 throw new NotFoundException("Int array resource ID #0x" 492 + Integer.toHexString(id)); 493 } 494 495 /** 496 * Return an array of heterogeneous values. 497 * 498 * @param id The desired resource identifier, as generated by the aapt 499 * tool. This integer encodes the package, type, and resource 500 * entry. The value 0 is an invalid identifier. 501 * 502 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 503 * 504 * @return Returns a TypedArray holding an array of the array values. 505 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 506 * when done with it. 507 */ 508 public TypedArray obtainTypedArray(int id) throws NotFoundException { 509 int len = mAssets.getArraySize(id); 510 if (len < 0) { 511 throw new NotFoundException("Array resource ID #0x" 512 + Integer.toHexString(id)); 513 } 514 515 TypedArray array = getCachedStyledAttributes(len); 516 array.mLength = mAssets.retrieveArray(id, array.mData); 517 array.mIndices[0] = 0; 518 519 return array; 520 } 521 522 /** 523 * Retrieve a dimensional for a particular resource ID. Unit 524 * conversions are based on the current {@link DisplayMetrics} associated 525 * with the resources. 526 * 527 * @param id The desired resource identifier, as generated by the aapt 528 * tool. This integer encodes the package, type, and resource 529 * entry. The value 0 is an invalid identifier. 530 * 531 * @return Resource dimension value multiplied by the appropriate 532 * metric. 533 * 534 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 535 * 536 * @see #getDimensionPixelOffset 537 * @see #getDimensionPixelSize 538 */ 539 public float getDimension(int id) throws NotFoundException { 540 synchronized (mAccessLock) { 541 TypedValue value = mTmpValue; 542 if (value == null) { 543 mTmpValue = value = new TypedValue(); 544 } 545 getValue(id, value, true); 546 if (value.type == TypedValue.TYPE_DIMENSION) { 547 return TypedValue.complexToDimension(value.data, mMetrics); 548 } 549 throw new NotFoundException( 550 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 551 + Integer.toHexString(value.type) + " is not valid"); 552 } 553 } 554 555 /** 556 * Retrieve a dimensional for a particular resource ID for use 557 * as an offset in raw pixels. This is the same as 558 * {@link #getDimension}, except the returned value is converted to 559 * integer pixels for you. An offset conversion involves simply 560 * truncating the base value to an integer. 561 * 562 * @param id The desired resource identifier, as generated by the aapt 563 * tool. This integer encodes the package, type, and resource 564 * entry. The value 0 is an invalid identifier. 565 * 566 * @return Resource dimension value multiplied by the appropriate 567 * metric and truncated to integer pixels. 568 * 569 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 570 * 571 * @see #getDimension 572 * @see #getDimensionPixelSize 573 */ 574 public int getDimensionPixelOffset(int id) throws NotFoundException { 575 synchronized (mAccessLock) { 576 TypedValue value = mTmpValue; 577 if (value == null) { 578 mTmpValue = value = new TypedValue(); 579 } 580 getValue(id, value, true); 581 if (value.type == TypedValue.TYPE_DIMENSION) { 582 return TypedValue.complexToDimensionPixelOffset( 583 value.data, mMetrics); 584 } 585 throw new NotFoundException( 586 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 587 + Integer.toHexString(value.type) + " is not valid"); 588 } 589 } 590 591 /** 592 * Retrieve a dimensional for a particular resource ID for use 593 * as a size in raw pixels. This is the same as 594 * {@link #getDimension}, except the returned value is converted to 595 * integer pixels for use as a size. A size conversion involves 596 * rounding the base value, and ensuring that a non-zero base value 597 * is at least one pixel in size. 598 * 599 * @param id The desired resource identifier, as generated by the aapt 600 * tool. This integer encodes the package, type, and resource 601 * entry. The value 0 is an invalid identifier. 602 * 603 * @return Resource dimension value multiplied by the appropriate 604 * metric and truncated to integer pixels. 605 * 606 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 607 * 608 * @see #getDimension 609 * @see #getDimensionPixelOffset 610 */ 611 public int getDimensionPixelSize(int id) throws NotFoundException { 612 synchronized (mAccessLock) { 613 TypedValue value = mTmpValue; 614 if (value == null) { 615 mTmpValue = value = new TypedValue(); 616 } 617 getValue(id, value, true); 618 if (value.type == TypedValue.TYPE_DIMENSION) { 619 return TypedValue.complexToDimensionPixelSize( 620 value.data, mMetrics); 621 } 622 throw new NotFoundException( 623 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 624 + Integer.toHexString(value.type) + " is not valid"); 625 } 626 } 627 628 /** 629 * Retrieve a fractional unit for a particular resource ID. 630 * 631 * @param id The desired resource identifier, as generated by the aapt 632 * tool. This integer encodes the package, type, and resource 633 * entry. The value 0 is an invalid identifier. 634 * @param base The base value of this fraction. In other words, a 635 * standard fraction is multiplied by this value. 636 * @param pbase The parent base value of this fraction. In other 637 * words, a parent fraction (nn%p) is multiplied by this 638 * value. 639 * 640 * @return Attribute fractional value multiplied by the appropriate 641 * base value. 642 * 643 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 644 */ 645 public float getFraction(int id, int base, int pbase) { 646 synchronized (mAccessLock) { 647 TypedValue value = mTmpValue; 648 if (value == null) { 649 mTmpValue = value = new TypedValue(); 650 } 651 getValue(id, value, true); 652 if (value.type == TypedValue.TYPE_FRACTION) { 653 return TypedValue.complexToFraction(value.data, base, pbase); 654 } 655 throw new NotFoundException( 656 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 657 + Integer.toHexString(value.type) + " is not valid"); 658 } 659 } 660 661 /** 662 * Return a drawable object associated with a particular resource ID. 663 * Various types of objects will be returned depending on the underlying 664 * resource -- for example, a solid color, PNG image, scalable image, etc. 665 * The Drawable API hides these implementation details. 666 * 667 * <p class="note"><strong>Note:</strong> Prior to 668 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, this function 669 * would not correctly retrieve the final configuration density when 670 * the resource ID passed here is an alias to another Drawable resource. 671 * This means that if the density configuration of the alias resource 672 * is different than the actual resource, the density of the returned 673 * Drawable would be incorrect, resulting in bad scaling. To work 674 * around this, you can instead retrieve the Drawable through 675 * {@link TypedArray#getDrawable TypedArray.getDrawable}. Use 676 * {@link android.content.Context#obtainStyledAttributes(int[]) 677 * Context.obtainStyledAttributes} with 678 * an array containing the resource ID of interest to create the TypedArray.</p> 679 * 680 * @param id The desired resource identifier, as generated by the aapt 681 * tool. This integer encodes the package, type, and resource 682 * entry. The value 0 is an invalid identifier. 683 * 684 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 685 * 686 * @return Drawable An object that can be used to draw this resource. 687 */ 688 public Drawable getDrawable(int id) throws NotFoundException { 689 TypedValue value; 690 synchronized (mAccessLock) { 691 value = mTmpValue; 692 if (value == null) { 693 value = new TypedValue(); 694 } else { 695 mTmpValue = null; 696 } 697 getValue(id, value, true); 698 } 699 Drawable res = loadDrawable(value, id); 700 synchronized (mAccessLock) { 701 if (mTmpValue == null) { 702 mTmpValue = value; 703 } 704 } 705 return res; 706 } 707 708 /** 709 * Return a drawable object associated with a particular resource ID for the 710 * given screen density in DPI. This will set the drawable's density to be 711 * the device's density multiplied by the ratio of actual drawable density 712 * to requested density. This allows the drawable to be scaled up to the 713 * correct size if needed. Various types of objects will be returned 714 * depending on the underlying resource -- for example, a solid color, PNG 715 * image, scalable image, etc. The Drawable API hides these implementation 716 * details. 717 * 718 * @param id The desired resource identifier, as generated by the aapt tool. 719 * This integer encodes the package, type, and resource entry. 720 * The value 0 is an invalid identifier. 721 * @param density the desired screen density indicated by the resource as 722 * found in {@link DisplayMetrics}. 723 * @throws NotFoundException Throws NotFoundException if the given ID does 724 * not exist. 725 * @return Drawable An object that can be used to draw this resource. 726 */ 727 public Drawable getDrawableForDensity(int id, int density) throws NotFoundException { 728 TypedValue value; 729 synchronized (mAccessLock) { 730 value = mTmpValue; 731 if (value == null) { 732 value = new TypedValue(); 733 } else { 734 mTmpValue = null; 735 } 736 getValueForDensity(id, density, value, true); 737 738 /* 739 * Pretend the requested density is actually the display density. If 740 * the drawable returned is not the requested density, then force it 741 * to be scaled later by dividing its density by the ratio of 742 * requested density to actual device density. Drawables that have 743 * undefined density or no density don't need to be handled here. 744 */ 745 if (value.density > 0 && value.density != TypedValue.DENSITY_NONE) { 746 if (value.density == density) { 747 value.density = mMetrics.densityDpi; 748 } else { 749 value.density = (value.density * mMetrics.densityDpi) / density; 750 } 751 } 752 } 753 754 Drawable res = loadDrawable(value, id); 755 synchronized (mAccessLock) { 756 if (mTmpValue == null) { 757 mTmpValue = value; 758 } 759 } 760 return res; 761 } 762 763 /** 764 * Return a movie object associated with the particular resource ID. 765 * @param id The desired resource identifier, as generated by the aapt 766 * tool. This integer encodes the package, type, and resource 767 * entry. The value 0 is an invalid identifier. 768 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 769 * 770 */ 771 public Movie getMovie(int id) throws NotFoundException { 772 InputStream is = openRawResource(id); 773 Movie movie = Movie.decodeStream(is); 774 try { 775 is.close(); 776 } 777 catch (java.io.IOException e) { 778 // don't care, since the return value is valid 779 } 780 return movie; 781 } 782 783 /** 784 * Return a color integer associated with a particular resource ID. 785 * If the resource holds a complex 786 * {@link android.content.res.ColorStateList}, then the default color from 787 * the set is returned. 788 * 789 * @param id The desired resource identifier, as generated by the aapt 790 * tool. This integer encodes the package, type, and resource 791 * entry. The value 0 is an invalid identifier. 792 * 793 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 794 * 795 * @return Returns a single color value in the form 0xAARRGGBB. 796 */ 797 public int getColor(int id) throws NotFoundException { 798 TypedValue value; 799 synchronized (mAccessLock) { 800 value = mTmpValue; 801 if (value == null) { 802 value = new TypedValue(); 803 } 804 getValue(id, value, true); 805 if (value.type >= TypedValue.TYPE_FIRST_INT 806 && value.type <= TypedValue.TYPE_LAST_INT) { 807 mTmpValue = value; 808 return value.data; 809 } else if (value.type != TypedValue.TYPE_STRING) { 810 throw new NotFoundException( 811 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 812 + Integer.toHexString(value.type) + " is not valid"); 813 } 814 mTmpValue = null; 815 } 816 ColorStateList csl = loadColorStateList(value, id); 817 synchronized (mAccessLock) { 818 if (mTmpValue == null) { 819 mTmpValue = value; 820 } 821 } 822 return csl.getDefaultColor(); 823 } 824 825 /** 826 * Return a color state list associated with a particular resource ID. The 827 * resource may contain either a single raw color value, or a complex 828 * {@link android.content.res.ColorStateList} holding multiple possible colors. 829 * 830 * @param id The desired resource identifier of a {@link ColorStateList}, 831 * as generated by the aapt tool. This integer encodes the package, type, and resource 832 * entry. The value 0 is an invalid identifier. 833 * 834 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 835 * 836 * @return Returns a ColorStateList object containing either a single 837 * solid color or multiple colors that can be selected based on a state. 838 */ 839 public ColorStateList getColorStateList(int id) throws NotFoundException { 840 TypedValue value; 841 synchronized (mAccessLock) { 842 value = mTmpValue; 843 if (value == null) { 844 value = new TypedValue(); 845 } else { 846 mTmpValue = null; 847 } 848 getValue(id, value, true); 849 } 850 ColorStateList res = loadColorStateList(value, id); 851 synchronized (mAccessLock) { 852 if (mTmpValue == null) { 853 mTmpValue = value; 854 } 855 } 856 return res; 857 } 858 859 /** 860 * Return a boolean associated with a particular resource ID. This can be 861 * used with any integral resource value, and will return true if it is 862 * non-zero. 863 * 864 * @param id The desired resource identifier, as generated by the aapt 865 * tool. This integer encodes the package, type, and resource 866 * entry. The value 0 is an invalid identifier. 867 * 868 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 869 * 870 * @return Returns the boolean value contained in the resource. 871 */ 872 public boolean getBoolean(int id) throws NotFoundException { 873 synchronized (mAccessLock) { 874 TypedValue value = mTmpValue; 875 if (value == null) { 876 mTmpValue = value = new TypedValue(); 877 } 878 getValue(id, value, true); 879 if (value.type >= TypedValue.TYPE_FIRST_INT 880 && value.type <= TypedValue.TYPE_LAST_INT) { 881 return value.data != 0; 882 } 883 throw new NotFoundException( 884 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 885 + Integer.toHexString(value.type) + " is not valid"); 886 } 887 } 888 889 /** 890 * Return an integer associated with a particular resource ID. 891 * 892 * @param id The desired resource identifier, as generated by the aapt 893 * tool. This integer encodes the package, type, and resource 894 * entry. The value 0 is an invalid identifier. 895 * 896 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 897 * 898 * @return Returns the integer value contained in the resource. 899 */ 900 public int getInteger(int id) throws NotFoundException { 901 synchronized (mAccessLock) { 902 TypedValue value = mTmpValue; 903 if (value == null) { 904 mTmpValue = value = new TypedValue(); 905 } 906 getValue(id, value, true); 907 if (value.type >= TypedValue.TYPE_FIRST_INT 908 && value.type <= TypedValue.TYPE_LAST_INT) { 909 return value.data; 910 } 911 throw new NotFoundException( 912 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 913 + Integer.toHexString(value.type) + " is not valid"); 914 } 915 } 916 917 /** 918 * Return an XmlResourceParser through which you can read a view layout 919 * description for the given resource ID. This parser has limited 920 * functionality -- in particular, you can't change its input, and only 921 * the high-level events are available. 922 * 923 * <p>This function is really a simple wrapper for calling 924 * {@link #getXml} with a layout resource. 925 * 926 * @param id The desired resource identifier, as generated by the aapt 927 * tool. This integer encodes the package, type, and resource 928 * entry. The value 0 is an invalid identifier. 929 * 930 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 931 * 932 * @return A new parser object through which you can read 933 * the XML data. 934 * 935 * @see #getXml 936 */ 937 public XmlResourceParser getLayout(int id) throws NotFoundException { 938 return loadXmlResourceParser(id, "layout"); 939 } 940 941 /** 942 * Return an XmlResourceParser through which you can read an animation 943 * description for the given resource ID. This parser has limited 944 * functionality -- in particular, you can't change its input, and only 945 * the high-level events are available. 946 * 947 * <p>This function is really a simple wrapper for calling 948 * {@link #getXml} with an animation resource. 949 * 950 * @param id The desired resource identifier, as generated by the aapt 951 * tool. This integer encodes the package, type, and resource 952 * entry. The value 0 is an invalid identifier. 953 * 954 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 955 * 956 * @return A new parser object through which you can read 957 * the XML data. 958 * 959 * @see #getXml 960 */ 961 public XmlResourceParser getAnimation(int id) throws NotFoundException { 962 return loadXmlResourceParser(id, "anim"); 963 } 964 965 /** 966 * Return an XmlResourceParser through which you can read a generic XML 967 * resource for the given resource ID. 968 * 969 * <p>The XmlPullParser implementation returned here has some limited 970 * functionality. In particular, you can't change its input, and only 971 * high-level parsing events are available (since the document was 972 * pre-parsed for you at build time, which involved merging text and 973 * stripping comments). 974 * 975 * @param id The desired resource identifier, as generated by the aapt 976 * tool. This integer encodes the package, type, and resource 977 * entry. The value 0 is an invalid identifier. 978 * 979 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 980 * 981 * @return A new parser object through which you can read 982 * the XML data. 983 * 984 * @see android.util.AttributeSet 985 */ 986 public XmlResourceParser getXml(int id) throws NotFoundException { 987 return loadXmlResourceParser(id, "xml"); 988 } 989 990 /** 991 * Open a data stream for reading a raw resource. This can only be used 992 * with resources whose value is the name of an asset files -- that is, it can be 993 * used to open drawable, sound, and raw resources; it will fail on string 994 * and color resources. 995 * 996 * @param id The resource identifier to open, as generated by the appt 997 * tool. 998 * 999 * @return InputStream Access to the resource data. 1000 * 1001 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1002 * 1003 */ 1004 public InputStream openRawResource(int id) throws NotFoundException { 1005 TypedValue value; 1006 synchronized (mAccessLock) { 1007 value = mTmpValue; 1008 if (value == null) { 1009 value = new TypedValue(); 1010 } else { 1011 mTmpValue = null; 1012 } 1013 } 1014 InputStream res = openRawResource(id, value); 1015 synchronized (mAccessLock) { 1016 if (mTmpValue == null) { 1017 mTmpValue = value; 1018 } 1019 } 1020 return res; 1021 } 1022 1023 /** 1024 * Open a data stream for reading a raw resource. This can only be used 1025 * with resources whose value is the name of an asset file -- that is, it can be 1026 * used to open drawable, sound, and raw resources; it will fail on string 1027 * and color resources. 1028 * 1029 * @param id The resource identifier to open, as generated by the appt tool. 1030 * @param value The TypedValue object to hold the resource information. 1031 * 1032 * @return InputStream Access to the resource data. 1033 * 1034 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1035 */ 1036 public InputStream openRawResource(int id, TypedValue value) throws NotFoundException { 1037 getValue(id, value, true); 1038 1039 try { 1040 return mAssets.openNonAsset(value.assetCookie, value.string.toString(), 1041 AssetManager.ACCESS_STREAMING); 1042 } catch (Exception e) { 1043 NotFoundException rnf = new NotFoundException("File " + value.string.toString() + 1044 " from drawable resource ID #0x" + Integer.toHexString(id)); 1045 rnf.initCause(e); 1046 throw rnf; 1047 } 1048 } 1049 1050 /** 1051 * Open a file descriptor for reading a raw resource. This can only be used 1052 * with resources whose value is the name of an asset files -- that is, it can be 1053 * used to open drawable, sound, and raw resources; it will fail on string 1054 * and color resources. 1055 * 1056 * <p>This function only works for resources that are stored in the package 1057 * as uncompressed data, which typically includes things like mp3 files 1058 * and png images. 1059 * 1060 * @param id The resource identifier to open, as generated by the appt 1061 * tool. 1062 * 1063 * @return AssetFileDescriptor A new file descriptor you can use to read 1064 * the resource. This includes the file descriptor itself, as well as the 1065 * offset and length of data where the resource appears in the file. A 1066 * null is returned if the file exists but is compressed. 1067 * 1068 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1069 * 1070 */ 1071 public AssetFileDescriptor openRawResourceFd(int id) throws NotFoundException { 1072 TypedValue value; 1073 synchronized (mAccessLock) { 1074 value = mTmpValue; 1075 if (value == null) { 1076 value = new TypedValue(); 1077 } else { 1078 mTmpValue = null; 1079 } 1080 getValue(id, value, true); 1081 } 1082 try { 1083 return mAssets.openNonAssetFd( 1084 value.assetCookie, value.string.toString()); 1085 } catch (Exception e) { 1086 NotFoundException rnf = new NotFoundException( 1087 "File " + value.string.toString() 1088 + " from drawable resource ID #0x" 1089 + Integer.toHexString(id)); 1090 rnf.initCause(e); 1091 throw rnf; 1092 } finally { 1093 synchronized (mAccessLock) { 1094 if (mTmpValue == null) { 1095 mTmpValue = value; 1096 } 1097 } 1098 } 1099 } 1100 1101 /** 1102 * Return the raw data associated with a particular resource ID. 1103 * 1104 * @param id The desired resource identifier, as generated by the aapt 1105 * tool. This integer encodes the package, type, and resource 1106 * entry. The value 0 is an invalid identifier. 1107 * @param outValue Object in which to place the resource data. 1108 * @param resolveRefs If true, a resource that is a reference to another 1109 * resource will be followed so that you receive the 1110 * actual final resource data. If false, the TypedValue 1111 * will be filled in with the reference itself. 1112 * 1113 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1114 * 1115 */ 1116 public void getValue(int id, TypedValue outValue, boolean resolveRefs) 1117 throws NotFoundException { 1118 boolean found = mAssets.getResourceValue(id, 0, outValue, resolveRefs); 1119 if (found) { 1120 return; 1121 } 1122 throw new NotFoundException("Resource ID #0x" 1123 + Integer.toHexString(id)); 1124 } 1125 1126 /** 1127 * Get the raw value associated with a resource with associated density. 1128 * 1129 * @param id resource identifier 1130 * @param density density in DPI 1131 * @param resolveRefs If true, a resource that is a reference to another 1132 * resource will be followed so that you receive the actual final 1133 * resource data. If false, the TypedValue will be filled in with 1134 * the reference itself. 1135 * @throws NotFoundException Throws NotFoundException if the given ID does 1136 * not exist. 1137 * @see #getValue(String, TypedValue, boolean) 1138 */ 1139 public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs) 1140 throws NotFoundException { 1141 boolean found = mAssets.getResourceValue(id, density, outValue, resolveRefs); 1142 if (found) { 1143 return; 1144 } 1145 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)); 1146 } 1147 1148 /** 1149 * Return the raw data associated with a particular resource ID. 1150 * See getIdentifier() for information on how names are mapped to resource 1151 * IDs, and getString(int) for information on how string resources are 1152 * retrieved. 1153 * 1154 * <p>Note: use of this function is discouraged. It is much more 1155 * efficient to retrieve resources by identifier than by name. 1156 * 1157 * @param name The name of the desired resource. This is passed to 1158 * getIdentifier() with a default type of "string". 1159 * @param outValue Object in which to place the resource data. 1160 * @param resolveRefs If true, a resource that is a reference to another 1161 * resource will be followed so that you receive the 1162 * actual final resource data. If false, the TypedValue 1163 * will be filled in with the reference itself. 1164 * 1165 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1166 * 1167 */ 1168 public void getValue(String name, TypedValue outValue, boolean resolveRefs) 1169 throws NotFoundException { 1170 int id = getIdentifier(name, "string", null); 1171 if (id != 0) { 1172 getValue(id, outValue, resolveRefs); 1173 return; 1174 } 1175 throw new NotFoundException("String resource name " + name); 1176 } 1177 1178 /** 1179 * This class holds the current attribute values for a particular theme. 1180 * In other words, a Theme is a set of values for resource attributes; 1181 * these are used in conjunction with {@link TypedArray} 1182 * to resolve the final value for an attribute. 1183 * 1184 * <p>The Theme's attributes come into play in two ways: (1) a styled 1185 * attribute can explicit reference a value in the theme through the 1186 * "?themeAttribute" syntax; (2) if no value has been defined for a 1187 * particular styled attribute, as a last resort we will try to find that 1188 * attribute's value in the Theme. 1189 * 1190 * <p>You will normally use the {@link #obtainStyledAttributes} APIs to 1191 * retrieve XML attributes with style and theme information applied. 1192 */ 1193 public final class Theme { 1194 /** 1195 * Place new attribute values into the theme. The style resource 1196 * specified by <var>resid</var> will be retrieved from this Theme's 1197 * resources, its values placed into the Theme object. 1198 * 1199 * <p>The semantics of this function depends on the <var>force</var> 1200 * argument: If false, only values that are not already defined in 1201 * the theme will be copied from the system resource; otherwise, if 1202 * any of the style's attributes are already defined in the theme, the 1203 * current values in the theme will be overwritten. 1204 * 1205 * @param resid The resource ID of a style resource from which to 1206 * obtain attribute values. 1207 * @param force If true, values in the style resource will always be 1208 * used in the theme; otherwise, they will only be used 1209 * if not already defined in the theme. 1210 */ 1211 public void applyStyle(int resid, boolean force) { 1212 AssetManager.applyThemeStyle(mTheme, resid, force); 1213 } 1214 1215 /** 1216 * Set this theme to hold the same contents as the theme 1217 * <var>other</var>. If both of these themes are from the same 1218 * Resources object, they will be identical after this function 1219 * returns. If they are from different Resources, only the resources 1220 * they have in common will be set in this theme. 1221 * 1222 * @param other The existing Theme to copy from. 1223 */ 1224 public void setTo(Theme other) { 1225 AssetManager.copyTheme(mTheme, other.mTheme); 1226 } 1227 1228 /** 1229 * Return a TypedArray holding the values defined by 1230 * <var>Theme</var> which are listed in <var>attrs</var>. 1231 * 1232 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1233 * with the array. 1234 * 1235 * @param attrs The desired attributes. 1236 * 1237 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1238 * 1239 * @return Returns a TypedArray holding an array of the attribute values. 1240 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1241 * when done with it. 1242 * 1243 * @see Resources#obtainAttributes 1244 * @see #obtainStyledAttributes(int, int[]) 1245 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1246 */ 1247 public TypedArray obtainStyledAttributes(int[] attrs) { 1248 int len = attrs.length; 1249 TypedArray array = getCachedStyledAttributes(len); 1250 array.mRsrcs = attrs; 1251 AssetManager.applyStyle(mTheme, 0, 0, 0, attrs, 1252 array.mData, array.mIndices); 1253 return array; 1254 } 1255 1256 /** 1257 * Return a TypedArray holding the values defined by the style 1258 * resource <var>resid</var> which are listed in <var>attrs</var>. 1259 * 1260 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1261 * with the array. 1262 * 1263 * @param resid The desired style resource. 1264 * @param attrs The desired attributes in the style. 1265 * 1266 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1267 * 1268 * @return Returns a TypedArray holding an array of the attribute values. 1269 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1270 * when done with it. 1271 * 1272 * @see Resources#obtainAttributes 1273 * @see #obtainStyledAttributes(int[]) 1274 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1275 */ 1276 public TypedArray obtainStyledAttributes(int resid, int[] attrs) 1277 throws NotFoundException { 1278 int len = attrs.length; 1279 TypedArray array = getCachedStyledAttributes(len); 1280 array.mRsrcs = attrs; 1281 1282 AssetManager.applyStyle(mTheme, 0, resid, 0, attrs, 1283 array.mData, array.mIndices); 1284 if (false) { 1285 int[] data = array.mData; 1286 1287 System.out.println("**********************************************************"); 1288 System.out.println("**********************************************************"); 1289 System.out.println("**********************************************************"); 1290 System.out.println("Attributes:"); 1291 String s = " Attrs:"; 1292 int i; 1293 for (i=0; i<attrs.length; i++) { 1294 s = s + " 0x" + Integer.toHexString(attrs[i]); 1295 } 1296 System.out.println(s); 1297 s = " Found:"; 1298 TypedValue value = new TypedValue(); 1299 for (i=0; i<attrs.length; i++) { 1300 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1301 value.type = data[d+AssetManager.STYLE_TYPE]; 1302 value.data = data[d+AssetManager.STYLE_DATA]; 1303 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1304 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1305 s = s + " 0x" + Integer.toHexString(attrs[i]) 1306 + "=" + value; 1307 } 1308 System.out.println(s); 1309 } 1310 return array; 1311 } 1312 1313 /** 1314 * Return a TypedArray holding the attribute values in 1315 * <var>set</var> 1316 * that are listed in <var>attrs</var>. In addition, if the given 1317 * AttributeSet specifies a style class (through the "style" attribute), 1318 * that style will be applied on top of the base attributes it defines. 1319 * 1320 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1321 * with the array. 1322 * 1323 * <p>When determining the final value of a particular attribute, there 1324 * are four inputs that come into play:</p> 1325 * 1326 * <ol> 1327 * <li> Any attribute values in the given AttributeSet. 1328 * <li> The style resource specified in the AttributeSet (named 1329 * "style"). 1330 * <li> The default style specified by <var>defStyleAttr</var> and 1331 * <var>defStyleRes</var> 1332 * <li> The base values in this theme. 1333 * </ol> 1334 * 1335 * <p>Each of these inputs is considered in-order, with the first listed 1336 * taking precedence over the following ones. In other words, if in the 1337 * AttributeSet you have supplied <code><Button 1338 * textColor="#ff000000"></code>, then the button's text will 1339 * <em>always</em> be black, regardless of what is specified in any of 1340 * the styles. 1341 * 1342 * @param set The base set of attribute values. May be null. 1343 * @param attrs The desired attributes to be retrieved. 1344 * @param defStyleAttr An attribute in the current theme that contains a 1345 * reference to a style resource that supplies 1346 * defaults values for the TypedArray. Can be 1347 * 0 to not look for defaults. 1348 * @param defStyleRes A resource identifier of a style resource that 1349 * supplies default values for the TypedArray, 1350 * used only if defStyleAttr is 0 or can not be found 1351 * in the theme. Can be 0 to not look for defaults. 1352 * 1353 * @return Returns a TypedArray holding an array of the attribute values. 1354 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1355 * when done with it. 1356 * 1357 * @see Resources#obtainAttributes 1358 * @see #obtainStyledAttributes(int[]) 1359 * @see #obtainStyledAttributes(int, int[]) 1360 */ 1361 public TypedArray obtainStyledAttributes(AttributeSet set, 1362 int[] attrs, int defStyleAttr, int defStyleRes) { 1363 int len = attrs.length; 1364 TypedArray array = getCachedStyledAttributes(len); 1365 1366 // XXX note that for now we only work with compiled XML files. 1367 // To support generic XML files we will need to manually parse 1368 // out the attributes from the XML file (applying type information 1369 // contained in the resources and such). 1370 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1371 AssetManager.applyStyle( 1372 mTheme, defStyleAttr, defStyleRes, 1373 parser != null ? parser.mParseState : 0, attrs, 1374 array.mData, array.mIndices); 1375 1376 array.mRsrcs = attrs; 1377 array.mXml = parser; 1378 1379 if (false) { 1380 int[] data = array.mData; 1381 1382 System.out.println("Attributes:"); 1383 String s = " Attrs:"; 1384 int i; 1385 for (i=0; i<set.getAttributeCount(); i++) { 1386 s = s + " " + set.getAttributeName(i); 1387 int id = set.getAttributeNameResource(i); 1388 if (id != 0) { 1389 s = s + "(0x" + Integer.toHexString(id) + ")"; 1390 } 1391 s = s + "=" + set.getAttributeValue(i); 1392 } 1393 System.out.println(s); 1394 s = " Found:"; 1395 TypedValue value = new TypedValue(); 1396 for (i=0; i<attrs.length; i++) { 1397 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1398 value.type = data[d+AssetManager.STYLE_TYPE]; 1399 value.data = data[d+AssetManager.STYLE_DATA]; 1400 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1401 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1402 s = s + " 0x" + Integer.toHexString(attrs[i]) 1403 + "=" + value; 1404 } 1405 System.out.println(s); 1406 } 1407 1408 return array; 1409 } 1410 1411 /** 1412 * Retrieve the value of an attribute in the Theme. The contents of 1413 * <var>outValue</var> are ultimately filled in by 1414 * {@link Resources#getValue}. 1415 * 1416 * @param resid The resource identifier of the desired theme 1417 * attribute. 1418 * @param outValue Filled in with the ultimate resource value supplied 1419 * by the attribute. 1420 * @param resolveRefs If true, resource references will be walked; if 1421 * false, <var>outValue</var> may be a 1422 * TYPE_REFERENCE. In either case, it will never 1423 * be a TYPE_ATTRIBUTE. 1424 * 1425 * @return boolean Returns true if the attribute was found and 1426 * <var>outValue</var> is valid, else false. 1427 */ 1428 public boolean resolveAttribute(int resid, TypedValue outValue, 1429 boolean resolveRefs) { 1430 boolean got = mAssets.getThemeValue(mTheme, resid, outValue, resolveRefs); 1431 if (false) { 1432 System.out.println( 1433 "resolveAttribute #" + Integer.toHexString(resid) 1434 + " got=" + got + ", type=0x" + Integer.toHexString(outValue.type) 1435 + ", data=0x" + Integer.toHexString(outValue.data)); 1436 } 1437 return got; 1438 } 1439 1440 /** 1441 * Print contents of this theme out to the log. For debugging only. 1442 * 1443 * @param priority The log priority to use. 1444 * @param tag The log tag to use. 1445 * @param prefix Text to prefix each line printed. 1446 */ 1447 public void dump(int priority, String tag, String prefix) { 1448 AssetManager.dumpTheme(mTheme, priority, tag, prefix); 1449 } 1450 1451 protected void finalize() throws Throwable { 1452 super.finalize(); 1453 mAssets.releaseTheme(mTheme); 1454 } 1455 1456 /*package*/ Theme() { 1457 mAssets = Resources.this.mAssets; 1458 mTheme = mAssets.createTheme(); 1459 } 1460 1461 private final AssetManager mAssets; 1462 private final int mTheme; 1463 } 1464 1465 /** 1466 * Generate a new Theme object for this set of Resources. It initially 1467 * starts out empty. 1468 * 1469 * @return Theme The newly created Theme container. 1470 */ 1471 public final Theme newTheme() { 1472 return new Theme(); 1473 } 1474 1475 /** 1476 * Retrieve a set of basic attribute values from an AttributeSet, not 1477 * performing styling of them using a theme and/or style resources. 1478 * 1479 * @param set The current attribute values to retrieve. 1480 * @param attrs The specific attributes to be retrieved. 1481 * @return Returns a TypedArray holding an array of the attribute values. 1482 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1483 * when done with it. 1484 * 1485 * @see Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 1486 */ 1487 public TypedArray obtainAttributes(AttributeSet set, int[] attrs) { 1488 int len = attrs.length; 1489 TypedArray array = getCachedStyledAttributes(len); 1490 1491 // XXX note that for now we only work with compiled XML files. 1492 // To support generic XML files we will need to manually parse 1493 // out the attributes from the XML file (applying type information 1494 // contained in the resources and such). 1495 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1496 mAssets.retrieveAttributes(parser.mParseState, attrs, 1497 array.mData, array.mIndices); 1498 1499 array.mRsrcs = attrs; 1500 array.mXml = parser; 1501 1502 return array; 1503 } 1504 1505 /** 1506 * Store the newly updated configuration. 1507 */ 1508 public void updateConfiguration(Configuration config, 1509 DisplayMetrics metrics) { 1510 updateConfiguration(config, metrics, null); 1511 } 1512 1513 /** 1514 * @hide 1515 */ 1516 public void updateConfiguration(Configuration config, 1517 DisplayMetrics metrics, CompatibilityInfo compat) { 1518 synchronized (mAccessLock) { 1519 if (false) { 1520 Slog.i(TAG, "**** Updating config of " + this + ": old config is " 1521 + mConfiguration + " old compat is " + mCompatibilityInfo); 1522 Slog.i(TAG, "**** Updating config of " + this + ": new config is " 1523 + config + " new compat is " + compat); 1524 } 1525 if (compat != null) { 1526 mCompatibilityInfo = compat; 1527 } 1528 if (metrics != null) { 1529 mMetrics.setTo(metrics); 1530 } 1531 // NOTE: We should re-arrange this code to create a Display 1532 // with the CompatibilityInfo that is used everywhere we deal 1533 // with the display in relation to this app, rather than 1534 // doing the conversion here. This impl should be okay because 1535 // we make sure to return a compatible display in the places 1536 // where there are public APIs to retrieve the display... but 1537 // it would be cleaner and more maintainble to just be 1538 // consistently dealing with a compatible display everywhere in 1539 // the framework. 1540 mCompatibilityInfo.applyToDisplayMetrics(mMetrics); 1541 1542 int configChanges = 0xfffffff; 1543 if (config != null) { 1544 mTmpConfig.setTo(config); 1545 int density = config.densityDpi; 1546 if (density == Configuration.DENSITY_DPI_UNDEFINED) { 1547 density = mMetrics.noncompatDensityDpi; 1548 } 1549 1550 mCompatibilityInfo.applyToConfiguration(density, mTmpConfig); 1551 1552 if (mTmpConfig.locale == null) { 1553 mTmpConfig.locale = Locale.getDefault(); 1554 mTmpConfig.setLayoutDirection(mTmpConfig.locale); 1555 } 1556 configChanges = mConfiguration.updateFrom(mTmpConfig); 1557 configChanges = ActivityInfo.activityInfoConfigToNative(configChanges); 1558 } 1559 if (mConfiguration.locale == null) { 1560 mConfiguration.locale = Locale.getDefault(); 1561 mConfiguration.setLayoutDirection(mConfiguration.locale); 1562 } 1563 if (mConfiguration.densityDpi != Configuration.DENSITY_DPI_UNDEFINED) { 1564 mMetrics.densityDpi = mConfiguration.densityDpi; 1565 mMetrics.density = mConfiguration.densityDpi * DisplayMetrics.DENSITY_DEFAULT_SCALE; 1566 } 1567 mMetrics.scaledDensity = mMetrics.density * mConfiguration.fontScale; 1568 1569 String locale = null; 1570 if (mConfiguration.locale != null) { 1571 locale = mConfiguration.locale.getLanguage(); 1572 if (mConfiguration.locale.getCountry() != null) { 1573 locale += "-" + mConfiguration.locale.getCountry(); 1574 } 1575 } 1576 int width, height; 1577 if (mMetrics.widthPixels >= mMetrics.heightPixels) { 1578 width = mMetrics.widthPixels; 1579 height = mMetrics.heightPixels; 1580 } else { 1581 //noinspection SuspiciousNameCombination 1582 width = mMetrics.heightPixels; 1583 //noinspection SuspiciousNameCombination 1584 height = mMetrics.widthPixels; 1585 } 1586 int keyboardHidden = mConfiguration.keyboardHidden; 1587 if (keyboardHidden == Configuration.KEYBOARDHIDDEN_NO 1588 && mConfiguration.hardKeyboardHidden 1589 == Configuration.HARDKEYBOARDHIDDEN_YES) { 1590 keyboardHidden = Configuration.KEYBOARDHIDDEN_SOFT; 1591 } 1592 mAssets.setConfiguration(mConfiguration.mcc, mConfiguration.mnc, 1593 locale, mConfiguration.orientation, 1594 mConfiguration.touchscreen, 1595 mConfiguration.densityDpi, mConfiguration.keyboard, 1596 keyboardHidden, mConfiguration.navigation, width, height, 1597 mConfiguration.smallestScreenWidthDp, 1598 mConfiguration.screenWidthDp, mConfiguration.screenHeightDp, 1599 mConfiguration.screenLayout, mConfiguration.uiMode, 1600 Build.VERSION.RESOURCES_SDK_INT); 1601 1602 if (DEBUG_CONFIG) { 1603 Slog.i(TAG, "**** Updating config of " + this + ": final config is " + mConfiguration 1604 + " final compat is " + mCompatibilityInfo); 1605 } 1606 1607 clearDrawableCacheLocked(mDrawableCache, configChanges); 1608 clearDrawableCacheLocked(mColorDrawableCache, configChanges); 1609 1610 mColorStateListCache.clear(); 1611 1612 flushLayoutCache(); 1613 } 1614 synchronized (sSync) { 1615 if (mPluralRule != null) { 1616 mPluralRule = NativePluralRules.forLocale(config.locale); 1617 } 1618 } 1619 } 1620 1621 private void clearDrawableCacheLocked( 1622 LongSparseArray<WeakReference<ConstantState>> cache, 1623 int configChanges) { 1624 int N = cache.size(); 1625 if (DEBUG_CONFIG) { 1626 Log.d(TAG, "Cleaning up drawables config changes: 0x" 1627 + Integer.toHexString(configChanges)); 1628 } 1629 for (int i=0; i<N; i++) { 1630 WeakReference<Drawable.ConstantState> ref = cache.valueAt(i); 1631 if (ref != null) { 1632 Drawable.ConstantState cs = ref.get(); 1633 if (cs != null) { 1634 if (Configuration.needNewResources( 1635 configChanges, cs.getChangingConfigurations())) { 1636 if (DEBUG_CONFIG) { 1637 Log.d(TAG, "FLUSHING #0x" 1638 + Long.toHexString(mDrawableCache.keyAt(i)) 1639 + " / " + cs + " with changes: 0x" 1640 + Integer.toHexString(cs.getChangingConfigurations())); 1641 } 1642 cache.setValueAt(i, null); 1643 } else if (DEBUG_CONFIG) { 1644 Log.d(TAG, "(Keeping #0x" 1645 + Long.toHexString(cache.keyAt(i)) 1646 + " / " + cs + " with changes: 0x" 1647 + Integer.toHexString(cs.getChangingConfigurations()) 1648 + ")"); 1649 } 1650 } 1651 } 1652 } 1653 } 1654 1655 /** 1656 * Update the system resources configuration if they have previously 1657 * been initialized. 1658 * 1659 * @hide 1660 */ 1661 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics, 1662 CompatibilityInfo compat) { 1663 if (mSystem != null) { 1664 mSystem.updateConfiguration(config, metrics, compat); 1665 //Log.i(TAG, "Updated system resources " + mSystem 1666 // + ": " + mSystem.getConfiguration()); 1667 } 1668 } 1669 1670 /** 1671 * Return the current display metrics that are in effect for this resource 1672 * object. The returned object should be treated as read-only. 1673 * 1674 * @return The resource's current display metrics. 1675 */ 1676 public DisplayMetrics getDisplayMetrics() { 1677 if (DEBUG_CONFIG) Slog.v(TAG, "Returning DisplayMetrics: " + mMetrics.widthPixels 1678 + "x" + mMetrics.heightPixels + " " + mMetrics.density); 1679 return mMetrics; 1680 } 1681 1682 /** 1683 * Return the current configuration that is in effect for this resource 1684 * object. The returned object should be treated as read-only. 1685 * 1686 * @return The resource's current configuration. 1687 */ 1688 public Configuration getConfiguration() { 1689 return mConfiguration; 1690 } 1691 1692 /** 1693 * Return the compatibility mode information for the application. 1694 * The returned object should be treated as read-only. 1695 * 1696 * @return compatibility info. 1697 * @hide 1698 */ 1699 public CompatibilityInfo getCompatibilityInfo() { 1700 return mCompatibilityInfo; 1701 } 1702 1703 /** 1704 * This is just for testing. 1705 * @hide 1706 */ 1707 public void setCompatibilityInfo(CompatibilityInfo ci) { 1708 if (ci != null) { 1709 mCompatibilityInfo = ci; 1710 updateConfiguration(mConfiguration, mMetrics); 1711 } 1712 } 1713 1714 /** 1715 * Return a resource identifier for the given resource name. A fully 1716 * qualified resource name is of the form "package:type/entry". The first 1717 * two components (package and type) are optional if defType and 1718 * defPackage, respectively, are specified here. 1719 * 1720 * <p>Note: use of this function is discouraged. It is much more 1721 * efficient to retrieve resources by identifier than by name. 1722 * 1723 * @param name The name of the desired resource. 1724 * @param defType Optional default resource type to find, if "type/" is 1725 * not included in the name. Can be null to require an 1726 * explicit type. 1727 * @param defPackage Optional default package to find, if "package:" is 1728 * not included in the name. Can be null to require an 1729 * explicit package. 1730 * 1731 * @return int The associated resource identifier. Returns 0 if no such 1732 * resource was found. (0 is not a valid resource ID.) 1733 */ 1734 public int getIdentifier(String name, String defType, String defPackage) { 1735 if (name == null) { 1736 throw new NullPointerException("name is null"); 1737 } 1738 try { 1739 return Integer.parseInt(name); 1740 } catch (Exception e) { 1741 // Ignore 1742 } 1743 return mAssets.getResourceIdentifier(name, defType, defPackage); 1744 } 1745 1746 /** 1747 * Return true if given resource identifier includes a package. 1748 * 1749 * @hide 1750 */ 1751 public static boolean resourceHasPackage(int resid) { 1752 return (resid >>> 24) != 0; 1753 } 1754 1755 /** 1756 * Return the full name for a given resource identifier. This name is 1757 * a single string of the form "package:type/entry". 1758 * 1759 * @param resid The resource identifier whose name is to be retrieved. 1760 * 1761 * @return A string holding the name of the resource. 1762 * 1763 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1764 * 1765 * @see #getResourcePackageName 1766 * @see #getResourceTypeName 1767 * @see #getResourceEntryName 1768 */ 1769 public String getResourceName(int resid) throws NotFoundException { 1770 String str = mAssets.getResourceName(resid); 1771 if (str != null) return str; 1772 throw new NotFoundException("Unable to find resource ID #0x" 1773 + Integer.toHexString(resid)); 1774 } 1775 1776 /** 1777 * Return the package name for a given resource identifier. 1778 * 1779 * @param resid The resource identifier whose package name is to be 1780 * retrieved. 1781 * 1782 * @return A string holding the package name of the resource. 1783 * 1784 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1785 * 1786 * @see #getResourceName 1787 */ 1788 public String getResourcePackageName(int resid) throws NotFoundException { 1789 String str = mAssets.getResourcePackageName(resid); 1790 if (str != null) return str; 1791 throw new NotFoundException("Unable to find resource ID #0x" 1792 + Integer.toHexString(resid)); 1793 } 1794 1795 /** 1796 * Return the type name for a given resource identifier. 1797 * 1798 * @param resid The resource identifier whose type name is to be 1799 * retrieved. 1800 * 1801 * @return A string holding the type name of the resource. 1802 * 1803 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1804 * 1805 * @see #getResourceName 1806 */ 1807 public String getResourceTypeName(int resid) throws NotFoundException { 1808 String str = mAssets.getResourceTypeName(resid); 1809 if (str != null) return str; 1810 throw new NotFoundException("Unable to find resource ID #0x" 1811 + Integer.toHexString(resid)); 1812 } 1813 1814 /** 1815 * Return the entry name for a given resource identifier. 1816 * 1817 * @param resid The resource identifier whose entry name is to be 1818 * retrieved. 1819 * 1820 * @return A string holding the entry name of the resource. 1821 * 1822 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1823 * 1824 * @see #getResourceName 1825 */ 1826 public String getResourceEntryName(int resid) throws NotFoundException { 1827 String str = mAssets.getResourceEntryName(resid); 1828 if (str != null) return str; 1829 throw new NotFoundException("Unable to find resource ID #0x" 1830 + Integer.toHexString(resid)); 1831 } 1832 1833 /** 1834 * Parse a series of {@link android.R.styleable#Extra <extra>} tags from 1835 * an XML file. You call this when you are at the parent tag of the 1836 * extra tags, and it will return once all of the child tags have been parsed. 1837 * This will call {@link #parseBundleExtra} for each extra tag encountered. 1838 * 1839 * @param parser The parser from which to retrieve the extras. 1840 * @param outBundle A Bundle in which to place all parsed extras. 1841 * @throws XmlPullParserException 1842 * @throws IOException 1843 */ 1844 public void parseBundleExtras(XmlResourceParser parser, Bundle outBundle) 1845 throws XmlPullParserException, IOException { 1846 int outerDepth = parser.getDepth(); 1847 int type; 1848 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 1849 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1850 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1851 continue; 1852 } 1853 1854 String nodeName = parser.getName(); 1855 if (nodeName.equals("extra")) { 1856 parseBundleExtra("extra", parser, outBundle); 1857 XmlUtils.skipCurrentTag(parser); 1858 1859 } else { 1860 XmlUtils.skipCurrentTag(parser); 1861 } 1862 } 1863 } 1864 1865 /** 1866 * Parse a name/value pair out of an XML tag holding that data. The 1867 * AttributeSet must be holding the data defined by 1868 * {@link android.R.styleable#Extra}. The following value types are supported: 1869 * <ul> 1870 * <li> {@link TypedValue#TYPE_STRING}: 1871 * {@link Bundle#putCharSequence Bundle.putCharSequence()} 1872 * <li> {@link TypedValue#TYPE_INT_BOOLEAN}: 1873 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1874 * <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}: 1875 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1876 * <li> {@link TypedValue#TYPE_FLOAT}: 1877 * {@link Bundle#putCharSequence Bundle.putFloat()} 1878 * </ul> 1879 * 1880 * @param tagName The name of the tag these attributes come from; this is 1881 * only used for reporting error messages. 1882 * @param attrs The attributes from which to retrieve the name/value pair. 1883 * @param outBundle The Bundle in which to place the parsed value. 1884 * @throws XmlPullParserException If the attributes are not valid. 1885 */ 1886 public void parseBundleExtra(String tagName, AttributeSet attrs, 1887 Bundle outBundle) throws XmlPullParserException { 1888 TypedArray sa = obtainAttributes(attrs, 1889 com.android.internal.R.styleable.Extra); 1890 1891 String name = sa.getString( 1892 com.android.internal.R.styleable.Extra_name); 1893 if (name == null) { 1894 sa.recycle(); 1895 throw new XmlPullParserException("<" + tagName 1896 + "> requires an android:name attribute at " 1897 + attrs.getPositionDescription()); 1898 } 1899 1900 TypedValue v = sa.peekValue( 1901 com.android.internal.R.styleable.Extra_value); 1902 if (v != null) { 1903 if (v.type == TypedValue.TYPE_STRING) { 1904 CharSequence cs = v.coerceToString(); 1905 outBundle.putCharSequence(name, cs); 1906 } else if (v.type == TypedValue.TYPE_INT_BOOLEAN) { 1907 outBundle.putBoolean(name, v.data != 0); 1908 } else if (v.type >= TypedValue.TYPE_FIRST_INT 1909 && v.type <= TypedValue.TYPE_LAST_INT) { 1910 outBundle.putInt(name, v.data); 1911 } else if (v.type == TypedValue.TYPE_FLOAT) { 1912 outBundle.putFloat(name, v.getFloat()); 1913 } else { 1914 sa.recycle(); 1915 throw new XmlPullParserException("<" + tagName 1916 + "> only supports string, integer, float, color, and boolean at " 1917 + attrs.getPositionDescription()); 1918 } 1919 } else { 1920 sa.recycle(); 1921 throw new XmlPullParserException("<" + tagName 1922 + "> requires an android:value or android:resource attribute at " 1923 + attrs.getPositionDescription()); 1924 } 1925 1926 sa.recycle(); 1927 } 1928 1929 /** 1930 * Retrieve underlying AssetManager storage for these resources. 1931 */ 1932 public final AssetManager getAssets() { 1933 return mAssets; 1934 } 1935 1936 /** 1937 * Call this to remove all cached loaded layout resources from the 1938 * Resources object. Only intended for use with performance testing 1939 * tools. 1940 */ 1941 public final void flushLayoutCache() { 1942 synchronized (mCachedXmlBlockIds) { 1943 // First see if this block is in our cache. 1944 final int num = mCachedXmlBlockIds.length; 1945 for (int i=0; i<num; i++) { 1946 mCachedXmlBlockIds[i] = -0; 1947 XmlBlock oldBlock = mCachedXmlBlocks[i]; 1948 if (oldBlock != null) { 1949 oldBlock.close(); 1950 } 1951 mCachedXmlBlocks[i] = null; 1952 } 1953 } 1954 } 1955 1956 /** 1957 * Start preloading of resource data using this Resources object. Only 1958 * for use by the zygote process for loading common system resources. 1959 * {@hide} 1960 */ 1961 public final void startPreloading() { 1962 synchronized (sSync) { 1963 if (sPreloaded) { 1964 throw new IllegalStateException("Resources already preloaded"); 1965 } 1966 sPreloaded = true; 1967 mPreloading = true; 1968 sPreloadedDensity = DisplayMetrics.DENSITY_DEVICE; 1969 mConfiguration.densityDpi = sPreloadedDensity; 1970 updateConfiguration(null, null); 1971 } 1972 } 1973 1974 /** 1975 * Called by zygote when it is done preloading resources, to change back 1976 * to normal Resources operation. 1977 */ 1978 public final void finishPreloading() { 1979 if (mPreloading) { 1980 mPreloading = false; 1981 flushLayoutCache(); 1982 } 1983 } 1984 1985 /** 1986 * @hide 1987 */ 1988 public LongSparseArray<Drawable.ConstantState> getPreloadedDrawables() { 1989 return sPreloadedDrawables[0]; 1990 } 1991 1992 private boolean verifyPreloadConfig(int changingConfigurations, int allowVarying, 1993 int resourceId, String name) { 1994 // We allow preloading of resources even if they vary by font scale (which 1995 // doesn't impact resource selection) or density (which we handle specially by 1996 // simply turning off all preloading), as well as any other configs specified 1997 // by the caller. 1998 if (((changingConfigurations&~(ActivityInfo.CONFIG_FONT_SCALE | 1999 ActivityInfo.CONFIG_DENSITY)) & ~allowVarying) != 0) { 2000 String resName; 2001 try { 2002 resName = getResourceName(resourceId); 2003 } catch (NotFoundException e) { 2004 resName = "?"; 2005 } 2006 Log.w(TAG, "Preloaded " + name + " resource #0x" 2007 + Integer.toHexString(resourceId) 2008 + " (" + resName + ") that varies with configuration!!"); 2009 return false; 2010 } 2011 if (TRACE_FOR_PRELOAD) { 2012 String resName; 2013 try { 2014 resName = getResourceName(resourceId); 2015 } catch (NotFoundException e) { 2016 resName = "?"; 2017 } 2018 Log.w(TAG, "Preloading " + name + " resource #0x" 2019 + Integer.toHexString(resourceId) 2020 + " (" + resName + ")"); 2021 } 2022 return true; 2023 } 2024 2025 static private final int LAYOUT_DIR_CONFIG = ActivityInfo.activityInfoConfigToNative( 2026 ActivityInfo.CONFIG_LAYOUT_DIRECTION); 2027 2028 /*package*/ Drawable loadDrawable(TypedValue value, int id) 2029 throws NotFoundException { 2030 2031 if (TRACE_FOR_PRELOAD) { 2032 // Log only framework resources 2033 if ((id >>> 24) == 0x1) { 2034 final String name = getResourceName(id); 2035 if (name != null) android.util.Log.d("PreloadDrawable", name); 2036 } 2037 } 2038 2039 boolean isColorDrawable = false; 2040 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2041 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2042 isColorDrawable = true; 2043 } 2044 final long key = isColorDrawable ? value.data : 2045 (((long) value.assetCookie) << 32) | value.data; 2046 2047 Drawable dr = getCachedDrawable(isColorDrawable ? mColorDrawableCache : mDrawableCache, key); 2048 2049 if (dr != null) { 2050 return dr; 2051 } 2052 Drawable.ConstantState cs; 2053 if (isColorDrawable) { 2054 cs = sPreloadedColorDrawables.get(key); 2055 } else { 2056 cs = sPreloadedDrawables[mConfiguration.getLayoutDirection()].get(key); 2057 } 2058 if (cs != null) { 2059 dr = cs.newDrawable(this); 2060 } else { 2061 if (isColorDrawable) { 2062 dr = new ColorDrawable(value.data); 2063 } 2064 2065 if (dr == null) { 2066 if (value.string == null) { 2067 throw new NotFoundException( 2068 "Resource is not a Drawable (color or path): " + value); 2069 } 2070 2071 String file = value.string.toString(); 2072 2073 if (TRACE_FOR_MISS_PRELOAD) { 2074 // Log only framework resources 2075 if ((id >>> 24) == 0x1) { 2076 final String name = getResourceName(id); 2077 if (name != null) android.util.Log.d(TAG, "Loading framework drawable #" 2078 + Integer.toHexString(id) + ": " + name 2079 + " at " + file); 2080 } 2081 } 2082 2083 if (DEBUG_LOAD) Log.v(TAG, "Loading drawable for cookie " 2084 + value.assetCookie + ": " + file); 2085 2086 if (file.endsWith(".xml")) { 2087 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2088 try { 2089 XmlResourceParser rp = loadXmlResourceParser( 2090 file, id, value.assetCookie, "drawable"); 2091 dr = Drawable.createFromXml(this, rp); 2092 rp.close(); 2093 } catch (Exception e) { 2094 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2095 NotFoundException rnf = new NotFoundException( 2096 "File " + file + " from drawable resource ID #0x" 2097 + Integer.toHexString(id)); 2098 rnf.initCause(e); 2099 throw rnf; 2100 } 2101 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2102 2103 } else { 2104 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2105 try { 2106 InputStream is = mAssets.openNonAsset( 2107 value.assetCookie, file, AssetManager.ACCESS_STREAMING); 2108 // System.out.println("Opened file " + file + ": " + is); 2109 dr = Drawable.createFromResourceStream(this, value, is, 2110 file, null); 2111 is.close(); 2112 // System.out.println("Created stream: " + dr); 2113 } catch (Exception e) { 2114 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2115 NotFoundException rnf = new NotFoundException( 2116 "File " + file + " from drawable resource ID #0x" 2117 + Integer.toHexString(id)); 2118 rnf.initCause(e); 2119 throw rnf; 2120 } 2121 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2122 } 2123 } 2124 } 2125 2126 if (dr != null) { 2127 dr.setChangingConfigurations(value.changingConfigurations); 2128 cs = dr.getConstantState(); 2129 if (cs != null) { 2130 if (mPreloading) { 2131 final int changingConfigs = cs.getChangingConfigurations(); 2132 if (isColorDrawable) { 2133 if (verifyPreloadConfig(changingConfigs, 0, value.resourceId, 2134 "drawable")) { 2135 sPreloadedColorDrawables.put(key, cs); 2136 } 2137 } else { 2138 if (verifyPreloadConfig(changingConfigs, 2139 LAYOUT_DIR_CONFIG, value.resourceId, "drawable")) { 2140 if ((changingConfigs&LAYOUT_DIR_CONFIG) == 0) { 2141 // If this resource does not vary based on layout direction, 2142 // we can put it in all of the preload maps. 2143 sPreloadedDrawables[0].put(key, cs); 2144 sPreloadedDrawables[1].put(key, cs); 2145 } else { 2146 // Otherwise, only in the layout dir we loaded it for. 2147 final LongSparseArray<Drawable.ConstantState> preloads 2148 = sPreloadedDrawables[mConfiguration.getLayoutDirection()]; 2149 preloads.put(key, cs); 2150 } 2151 } 2152 } 2153 } else { 2154 synchronized (mAccessLock) { 2155 //Log.i(TAG, "Saving cached drawable @ #" + 2156 // Integer.toHexString(key.intValue()) 2157 // + " in " + this + ": " + cs); 2158 if (isColorDrawable) { 2159 mColorDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 2160 } else { 2161 mDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 2162 } 2163 } 2164 } 2165 } 2166 } 2167 2168 return dr; 2169 } 2170 2171 private Drawable getCachedDrawable( 2172 LongSparseArray<WeakReference<ConstantState>> drawableCache, 2173 long key) { 2174 synchronized (mAccessLock) { 2175 WeakReference<Drawable.ConstantState> wr = drawableCache.get(key); 2176 if (wr != null) { // we have the key 2177 Drawable.ConstantState entry = wr.get(); 2178 if (entry != null) { 2179 //Log.i(TAG, "Returning cached drawable @ #" + 2180 // Integer.toHexString(((Integer)key).intValue()) 2181 // + " in " + this + ": " + entry); 2182 return entry.newDrawable(this); 2183 } 2184 else { // our entry has been purged 2185 drawableCache.delete(key); 2186 } 2187 } 2188 } 2189 return null; 2190 } 2191 2192 /*package*/ ColorStateList loadColorStateList(TypedValue value, int id) 2193 throws NotFoundException { 2194 if (TRACE_FOR_PRELOAD) { 2195 // Log only framework resources 2196 if ((id >>> 24) == 0x1) { 2197 final String name = getResourceName(id); 2198 if (name != null) android.util.Log.d("PreloadColorStateList", name); 2199 } 2200 } 2201 2202 final long key = (((long) value.assetCookie) << 32) | value.data; 2203 2204 ColorStateList csl; 2205 2206 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2207 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2208 2209 csl = sPreloadedColorStateLists.get(key); 2210 if (csl != null) { 2211 return csl; 2212 } 2213 2214 csl = ColorStateList.valueOf(value.data); 2215 if (mPreloading) { 2216 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2217 "color")) { 2218 sPreloadedColorStateLists.put(key, csl); 2219 } 2220 } 2221 2222 return csl; 2223 } 2224 2225 csl = getCachedColorStateList(key); 2226 if (csl != null) { 2227 return csl; 2228 } 2229 2230 csl = sPreloadedColorStateLists.get(key); 2231 if (csl != null) { 2232 return csl; 2233 } 2234 2235 if (value.string == null) { 2236 throw new NotFoundException( 2237 "Resource is not a ColorStateList (color or path): " + value); 2238 } 2239 2240 String file = value.string.toString(); 2241 2242 if (file.endsWith(".xml")) { 2243 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2244 try { 2245 XmlResourceParser rp = loadXmlResourceParser( 2246 file, id, value.assetCookie, "colorstatelist"); 2247 csl = ColorStateList.createFromXml(this, rp); 2248 rp.close(); 2249 } catch (Exception e) { 2250 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2251 NotFoundException rnf = new NotFoundException( 2252 "File " + file + " from color state list resource ID #0x" 2253 + Integer.toHexString(id)); 2254 rnf.initCause(e); 2255 throw rnf; 2256 } 2257 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2258 } else { 2259 throw new NotFoundException( 2260 "File " + file + " from drawable resource ID #0x" 2261 + Integer.toHexString(id) + ": .xml extension required"); 2262 } 2263 2264 if (csl != null) { 2265 if (mPreloading) { 2266 if (verifyPreloadConfig(value.changingConfigurations, 0, value.resourceId, 2267 "color")) { 2268 sPreloadedColorStateLists.put(key, csl); 2269 } 2270 } else { 2271 synchronized (mAccessLock) { 2272 //Log.i(TAG, "Saving cached color state list @ #" + 2273 // Integer.toHexString(key.intValue()) 2274 // + " in " + this + ": " + csl); 2275 mColorStateListCache.put(key, new WeakReference<ColorStateList>(csl)); 2276 } 2277 } 2278 } 2279 2280 return csl; 2281 } 2282 2283 private ColorStateList getCachedColorStateList(long key) { 2284 synchronized (mAccessLock) { 2285 WeakReference<ColorStateList> wr = mColorStateListCache.get(key); 2286 if (wr != null) { // we have the key 2287 ColorStateList entry = wr.get(); 2288 if (entry != null) { 2289 //Log.i(TAG, "Returning cached color state list @ #" + 2290 // Integer.toHexString(((Integer)key).intValue()) 2291 // + " in " + this + ": " + entry); 2292 return entry; 2293 } else { // our entry has been purged 2294 mColorStateListCache.delete(key); 2295 } 2296 } 2297 } 2298 return null; 2299 } 2300 2301 /*package*/ XmlResourceParser loadXmlResourceParser(int id, String type) 2302 throws NotFoundException { 2303 synchronized (mAccessLock) { 2304 TypedValue value = mTmpValue; 2305 if (value == null) { 2306 mTmpValue = value = new TypedValue(); 2307 } 2308 getValue(id, value, true); 2309 if (value.type == TypedValue.TYPE_STRING) { 2310 return loadXmlResourceParser(value.string.toString(), id, 2311 value.assetCookie, type); 2312 } 2313 throw new NotFoundException( 2314 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 2315 + Integer.toHexString(value.type) + " is not valid"); 2316 } 2317 } 2318 2319 /*package*/ XmlResourceParser loadXmlResourceParser(String file, int id, 2320 int assetCookie, String type) throws NotFoundException { 2321 if (id != 0) { 2322 try { 2323 // These may be compiled... 2324 synchronized (mCachedXmlBlockIds) { 2325 // First see if this block is in our cache. 2326 final int num = mCachedXmlBlockIds.length; 2327 for (int i=0; i<num; i++) { 2328 if (mCachedXmlBlockIds[i] == id) { 2329 //System.out.println("**** REUSING XML BLOCK! id=" 2330 // + id + ", index=" + i); 2331 return mCachedXmlBlocks[i].newParser(); 2332 } 2333 } 2334 2335 // Not in the cache, create a new block and put it at 2336 // the next slot in the cache. 2337 XmlBlock block = mAssets.openXmlBlockAsset( 2338 assetCookie, file); 2339 if (block != null) { 2340 int pos = mLastCachedXmlBlockIndex+1; 2341 if (pos >= num) pos = 0; 2342 mLastCachedXmlBlockIndex = pos; 2343 XmlBlock oldBlock = mCachedXmlBlocks[pos]; 2344 if (oldBlock != null) { 2345 oldBlock.close(); 2346 } 2347 mCachedXmlBlockIds[pos] = id; 2348 mCachedXmlBlocks[pos] = block; 2349 //System.out.println("**** CACHING NEW XML BLOCK! id=" 2350 // + id + ", index=" + pos); 2351 return block.newParser(); 2352 } 2353 } 2354 } catch (Exception e) { 2355 NotFoundException rnf = new NotFoundException( 2356 "File " + file + " from xml type " + type + " resource ID #0x" 2357 + Integer.toHexString(id)); 2358 rnf.initCause(e); 2359 throw rnf; 2360 } 2361 } 2362 2363 throw new NotFoundException( 2364 "File " + file + " from xml type " + type + " resource ID #0x" 2365 + Integer.toHexString(id)); 2366 } 2367 2368 private TypedArray getCachedStyledAttributes(int len) { 2369 synchronized (mAccessLock) { 2370 TypedArray attrs = mCachedStyledAttributes; 2371 if (attrs != null) { 2372 mCachedStyledAttributes = null; 2373 if (DEBUG_ATTRIBUTES_CACHE) { 2374 mLastRetrievedAttrs = new RuntimeException("here"); 2375 mLastRetrievedAttrs.fillInStackTrace(); 2376 } 2377 2378 attrs.mLength = len; 2379 int fullLen = len * AssetManager.STYLE_NUM_ENTRIES; 2380 if (attrs.mData.length >= fullLen) { 2381 return attrs; 2382 } 2383 attrs.mData = new int[fullLen]; 2384 attrs.mIndices = new int[1+len]; 2385 return attrs; 2386 } 2387 if (DEBUG_ATTRIBUTES_CACHE) { 2388 RuntimeException here = new RuntimeException("here"); 2389 here.fillInStackTrace(); 2390 if (mLastRetrievedAttrs != null) { 2391 Log.i(TAG, "Allocated new TypedArray of " + len + " in " + this, here); 2392 Log.i(TAG, "Last retrieved attributes here", mLastRetrievedAttrs); 2393 } 2394 mLastRetrievedAttrs = here; 2395 } 2396 return new TypedArray(this, 2397 new int[len*AssetManager.STYLE_NUM_ENTRIES], 2398 new int[1+len], len); 2399 } 2400 } 2401 2402 private Resources() { 2403 mAssets = AssetManager.getSystem(); 2404 // NOTE: Intentionally leaving this uninitialized (all values set 2405 // to zero), so that anyone who tries to do something that requires 2406 // metrics will get a very wrong value. 2407 mConfiguration.setToDefaults(); 2408 mMetrics.setToDefaults(); 2409 updateConfiguration(null, null); 2410 mAssets.ensureStringBlocks(); 2411 } 2412} 2413