Resources.java revision 0acc1931d364fabb32e2051f58bfbbc5f2505176
1/* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.content.res; 18 19import android.os.Trace; 20import com.android.internal.util.XmlUtils; 21 22import org.xmlpull.v1.XmlPullParser; 23import org.xmlpull.v1.XmlPullParserException; 24 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.util.AttributeSet; 33import android.util.DisplayMetrics; 34import android.util.Log; 35import android.util.Slog; 36import android.util.TypedValue; 37import android.util.LongSparseArray; 38 39import java.io.IOException; 40import java.io.InputStream; 41import java.lang.ref.WeakReference; 42import java.util.Locale; 43 44import libcore.icu.NativePluralRules; 45 46/** 47 * Class for accessing an application's resources. This sits on top of the 48 * asset manager of the application (accessible through {@link #getAssets}) and 49 * provides a high-level API for getting typed data from the assets. 50 * 51 * <p>The Android resource system keeps track of all non-code assets associated with an 52 * application. You can use this class to access your application's resources. You can generally 53 * acquire the {@link android.content.res.Resources} instance associated with your application 54 * with {@link android.content.Context#getResources getResources()}.</p> 55 * 56 * <p>The Android SDK tools compile your application's resources into the application binary 57 * at build time. To use a resource, you must install it correctly in the source tree (inside 58 * your project's {@code res/} directory) and build your application. As part of the build 59 * process, the SDK tools generate symbols for each resource, which you can use in your application 60 * code to access the resources.</p> 61 * 62 * <p>Using application resources makes it easy to update various characteristics of your 63 * application without modifying code, and—by providing sets of alternative 64 * resources—enables you to optimize your application for a variety of device configurations 65 * (such as for different languages and screen sizes). This is an important aspect of developing 66 * Android applications that are compatible on different types of devices.</p> 67 * 68 * <p>For more information about using resources, see the documentation about <a 69 * href="{@docRoot}guide/topics/resources/index.html">Application Resources</a>.</p> 70 */ 71public class Resources { 72 static final String TAG = "Resources"; 73 private static final boolean DEBUG_LOAD = false; 74 private static final boolean DEBUG_CONFIG = false; 75 private static final boolean DEBUG_ATTRIBUTES_CACHE = false; 76 private static final boolean TRACE_FOR_PRELOAD = false; 77 private static final boolean TRACE_FOR_MISS_PRELOAD = false; 78 79 private static final int ID_OTHER = 0x01000004; 80 81 private static final Object sSync = new Object(); 82 /*package*/ static Resources mSystem = null; 83 84 // Information about preloaded resources. Note that they are not 85 // protected by a lock, because while preloading in zygote we are all 86 // single-threaded, and after that these are immutable. 87 private static final LongSparseArray<Drawable.ConstantState> sPreloadedDrawables 88 = new LongSparseArray<Drawable.ConstantState>(); 89 private static final LongSparseArray<ColorStateList> sPreloadedColorStateLists 90 = new LongSparseArray<ColorStateList>(); 91 private static final LongSparseArray<Drawable.ConstantState> sPreloadedColorDrawables 92 = new LongSparseArray<Drawable.ConstantState>(); 93 private static boolean sPreloaded; 94 private static int sPreloadedDensity; 95 96 // These are protected by mAccessLock. 97 98 /*package*/ final Object mAccessLock = new Object(); 99 /*package*/ final Configuration mTmpConfig = new Configuration(); 100 /*package*/ TypedValue mTmpValue = new TypedValue(); 101 /*package*/ final LongSparseArray<WeakReference<Drawable.ConstantState> > mDrawableCache 102 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(); 103 /*package*/ final LongSparseArray<WeakReference<ColorStateList> > mColorStateListCache 104 = new LongSparseArray<WeakReference<ColorStateList> >(); 105 /*package*/ final LongSparseArray<WeakReference<Drawable.ConstantState> > mColorDrawableCache 106 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(); 107 /*package*/ boolean mPreloading; 108 109 /*package*/ TypedArray mCachedStyledAttributes = null; 110 RuntimeException mLastRetrievedAttrs = null; 111 112 private int mLastCachedXmlBlockIndex = -1; 113 private final int[] mCachedXmlBlockIds = { 0, 0, 0, 0 }; 114 private final XmlBlock[] mCachedXmlBlocks = new XmlBlock[4]; 115 116 /*package*/ final AssetManager mAssets; 117 private final Configuration mConfiguration = new Configuration(); 118 /*package*/ final DisplayMetrics mMetrics = new DisplayMetrics(); 119 private NativePluralRules mPluralRule; 120 121 private CompatibilityInfo mCompatibilityInfo; 122 123 /** @hide */ 124 public static int selectDefaultTheme(int curTheme, int targetSdkVersion) { 125 return selectSystemTheme(curTheme, targetSdkVersion, 126 com.android.internal.R.style.Theme, 127 com.android.internal.R.style.Theme_Holo, 128 com.android.internal.R.style.Theme_DeviceDefault); 129 } 130 131 /** @hide */ 132 public static int selectSystemTheme(int curTheme, int targetSdkVersion, 133 int orig, int holo, int deviceDefault) { 134 if (curTheme != 0) { 135 return curTheme; 136 } 137 if (targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) { 138 return orig; 139 } 140 if (targetSdkVersion < Build.VERSION_CODES.ICE_CREAM_SANDWICH) { 141 return holo; 142 } 143 return deviceDefault; 144 } 145 146 /** 147 * This exception is thrown by the resource APIs when a requested resource 148 * can not be found. 149 */ 150 public static class NotFoundException extends RuntimeException { 151 public NotFoundException() { 152 } 153 154 public NotFoundException(String name) { 155 super(name); 156 } 157 } 158 159 /** 160 * Create a new Resources object on top of an existing set of assets in an 161 * AssetManager. 162 * 163 * @param assets Previously created AssetManager. 164 * @param metrics Current display metrics to consider when 165 * selecting/computing resource values. 166 * @param config Desired device configuration to consider when 167 * selecting/computing resource values (optional). 168 */ 169 public Resources(AssetManager assets, DisplayMetrics metrics, Configuration config) { 170 this(assets, metrics, config, null); 171 } 172 173 /** 174 * Creates a new Resources object with CompatibilityInfo. 175 * 176 * @param assets Previously created AssetManager. 177 * @param metrics Current display metrics to consider when 178 * selecting/computing resource values. 179 * @param config Desired device configuration to consider when 180 * selecting/computing resource values (optional). 181 * @param compInfo this resource's compatibility info. It will use the default compatibility 182 * info when it's null. 183 * @hide 184 */ 185 public Resources(AssetManager assets, DisplayMetrics metrics, 186 Configuration config, CompatibilityInfo compInfo) { 187 mAssets = assets; 188 mMetrics.setToDefaults(); 189 mCompatibilityInfo = compInfo; 190 updateConfiguration(config, metrics); 191 assets.ensureStringBlocks(); 192 } 193 194 /** 195 * Return a global shared Resources object that provides access to only 196 * system resources (no application resources), and is not configured for 197 * the current screen (can not use dimension units, does not change based 198 * on orientation, etc). 199 */ 200 public static Resources getSystem() { 201 synchronized (sSync) { 202 Resources ret = mSystem; 203 if (ret == null) { 204 ret = new Resources(); 205 mSystem = ret; 206 } 207 208 return ret; 209 } 210 } 211 212 /** 213 * Return the string value associated with a particular resource ID. The 214 * returned object will be a String if this is a plain string; it will be 215 * some other type of CharSequence if it is styled. 216 * {@more} 217 * 218 * @param id The desired resource identifier, as generated by the aapt 219 * tool. This integer encodes the package, type, and resource 220 * entry. The value 0 is an invalid identifier. 221 * 222 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 223 * 224 * @return CharSequence The string data associated with the resource, plus 225 * possibly styled text information. 226 */ 227 public CharSequence getText(int id) throws NotFoundException { 228 CharSequence res = mAssets.getResourceText(id); 229 if (res != null) { 230 return res; 231 } 232 throw new NotFoundException("String resource ID #0x" 233 + Integer.toHexString(id)); 234 } 235 236 /** 237 * Returns the character sequence necessary for grammatically correct pluralization 238 * of the given resource ID for the given quantity. 239 * Note that the character sequence is selected based solely on grammatical necessity, 240 * and that such rules differ between languages. Do not assume you know which string 241 * will be returned for a given quantity. See 242 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 243 * for more detail. 244 * 245 * @param id The desired resource identifier, as generated by the aapt 246 * tool. This integer encodes the package, type, and resource 247 * entry. The value 0 is an invalid identifier. 248 * @param quantity The number used to get the correct string for the current language's 249 * plural rules. 250 * 251 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 252 * 253 * @return CharSequence The string data associated with the resource, plus 254 * possibly styled text information. 255 */ 256 public CharSequence getQuantityText(int id, int quantity) throws NotFoundException { 257 NativePluralRules rule = getPluralRule(); 258 CharSequence res = mAssets.getResourceBagText(id, 259 attrForQuantityCode(rule.quantityForInt(quantity))); 260 if (res != null) { 261 return res; 262 } 263 res = mAssets.getResourceBagText(id, ID_OTHER); 264 if (res != null) { 265 return res; 266 } 267 throw new NotFoundException("Plural resource ID #0x" + Integer.toHexString(id) 268 + " quantity=" + quantity 269 + " item=" + stringForQuantityCode(rule.quantityForInt(quantity))); 270 } 271 272 private NativePluralRules getPluralRule() { 273 synchronized (sSync) { 274 if (mPluralRule == null) { 275 mPluralRule = NativePluralRules.forLocale(mConfiguration.locale); 276 } 277 return mPluralRule; 278 } 279 } 280 281 private static int attrForQuantityCode(int quantityCode) { 282 switch (quantityCode) { 283 case NativePluralRules.ZERO: return 0x01000005; 284 case NativePluralRules.ONE: return 0x01000006; 285 case NativePluralRules.TWO: return 0x01000007; 286 case NativePluralRules.FEW: return 0x01000008; 287 case NativePluralRules.MANY: return 0x01000009; 288 default: return ID_OTHER; 289 } 290 } 291 292 private static String stringForQuantityCode(int quantityCode) { 293 switch (quantityCode) { 294 case NativePluralRules.ZERO: return "zero"; 295 case NativePluralRules.ONE: return "one"; 296 case NativePluralRules.TWO: return "two"; 297 case NativePluralRules.FEW: return "few"; 298 case NativePluralRules.MANY: return "many"; 299 default: return "other"; 300 } 301 } 302 303 /** 304 * Return the string value associated with a particular resource ID. It 305 * will be stripped of any styled text information. 306 * {@more} 307 * 308 * @param id The desired resource identifier, as generated by the aapt 309 * tool. This integer encodes the package, type, and resource 310 * entry. The value 0 is an invalid identifier. 311 * 312 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 313 * 314 * @return String The string data associated with the resource, 315 * stripped of styled text information. 316 */ 317 public String getString(int id) throws NotFoundException { 318 CharSequence res = getText(id); 319 if (res != null) { 320 return res.toString(); 321 } 322 throw new NotFoundException("String resource ID #0x" 323 + Integer.toHexString(id)); 324 } 325 326 327 /** 328 * Return the string value associated with a particular resource ID, 329 * substituting the format arguments as defined in {@link java.util.Formatter} 330 * and {@link java.lang.String#format}. It will be stripped of any styled text 331 * information. 332 * {@more} 333 * 334 * @param id The desired resource identifier, as generated by the aapt 335 * tool. This integer encodes the package, type, and resource 336 * entry. The value 0 is an invalid identifier. 337 * 338 * @param formatArgs The format arguments that will be used for substitution. 339 * 340 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 341 * 342 * @return String The string data associated with the resource, 343 * stripped of styled text information. 344 */ 345 public String getString(int id, Object... formatArgs) throws NotFoundException { 346 String raw = getString(id); 347 return String.format(mConfiguration.locale, raw, formatArgs); 348 } 349 350 /** 351 * Formats the string necessary for grammatically correct pluralization 352 * of the given resource ID for the given quantity, using the given arguments. 353 * Note that the string is selected based solely on grammatical necessity, 354 * and that such rules differ between languages. Do not assume you know which string 355 * will be returned for a given quantity. See 356 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 357 * for more detail. 358 * 359 * <p>Substitution of format arguments works as if using 360 * {@link java.util.Formatter} and {@link java.lang.String#format}. 361 * The resulting string will be stripped of any styled text information. 362 * 363 * @param id The desired resource identifier, as generated by the aapt 364 * tool. This integer encodes the package, type, and resource 365 * entry. The value 0 is an invalid identifier. 366 * @param quantity The number used to get the correct string for the current language's 367 * plural rules. 368 * @param formatArgs The format arguments that will be used for substitution. 369 * 370 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 371 * 372 * @return String The string data associated with the resource, 373 * stripped of styled text information. 374 */ 375 public String getQuantityString(int id, int quantity, Object... formatArgs) 376 throws NotFoundException { 377 String raw = getQuantityText(id, quantity).toString(); 378 return String.format(mConfiguration.locale, raw, formatArgs); 379 } 380 381 /** 382 * Returns the string necessary for grammatically correct pluralization 383 * of the given resource ID for the given quantity. 384 * Note that the string is selected based solely on grammatical necessity, 385 * and that such rules differ between languages. Do not assume you know which string 386 * will be returned for a given quantity. See 387 * <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String Resources</a> 388 * for more detail. 389 * 390 * @param id The desired resource identifier, as generated by the aapt 391 * tool. This integer encodes the package, type, and resource 392 * entry. The value 0 is an invalid identifier. 393 * @param quantity The number used to get the correct string for the current language's 394 * plural rules. 395 * 396 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 397 * 398 * @return String The string data associated with the resource, 399 * stripped of styled text information. 400 */ 401 public String getQuantityString(int id, int quantity) throws NotFoundException { 402 return getQuantityText(id, quantity).toString(); 403 } 404 405 /** 406 * Return the string value associated with a particular resource ID. The 407 * returned object will be a String if this is a plain string; it will be 408 * some other type of CharSequence if it is styled. 409 * 410 * @param id The desired resource identifier, as generated by the aapt 411 * tool. This integer encodes the package, type, and resource 412 * entry. The value 0 is an invalid identifier. 413 * 414 * @param def The default CharSequence to return. 415 * 416 * @return CharSequence The string data associated with the resource, plus 417 * possibly styled text information, or def if id is 0 or not found. 418 */ 419 public CharSequence getText(int id, CharSequence def) { 420 CharSequence res = id != 0 ? mAssets.getResourceText(id) : null; 421 return res != null ? res : def; 422 } 423 424 /** 425 * Return the styled text array associated with a particular resource ID. 426 * 427 * @param id The desired resource identifier, as generated by the aapt 428 * tool. This integer encodes the package, type, and resource 429 * entry. The value 0 is an invalid identifier. 430 * 431 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 432 * 433 * @return The styled text array associated with the resource. 434 */ 435 public CharSequence[] getTextArray(int id) throws NotFoundException { 436 CharSequence[] res = mAssets.getResourceTextArray(id); 437 if (res != null) { 438 return res; 439 } 440 throw new NotFoundException("Text array resource ID #0x" 441 + Integer.toHexString(id)); 442 } 443 444 /** 445 * Return the string array associated with a particular resource ID. 446 * 447 * @param id The desired resource identifier, as generated by the aapt 448 * tool. This integer encodes the package, type, and resource 449 * entry. The value 0 is an invalid identifier. 450 * 451 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 452 * 453 * @return The string array associated with the resource. 454 */ 455 public String[] getStringArray(int id) throws NotFoundException { 456 String[] res = mAssets.getResourceStringArray(id); 457 if (res != null) { 458 return res; 459 } 460 throw new NotFoundException("String array resource ID #0x" 461 + Integer.toHexString(id)); 462 } 463 464 /** 465 * Return the int array associated with a particular resource ID. 466 * 467 * @param id The desired resource identifier, as generated by the aapt 468 * tool. This integer encodes the package, type, and resource 469 * entry. The value 0 is an invalid identifier. 470 * 471 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 472 * 473 * @return The int array associated with the resource. 474 */ 475 public int[] getIntArray(int id) throws NotFoundException { 476 int[] res = mAssets.getArrayIntResource(id); 477 if (res != null) { 478 return res; 479 } 480 throw new NotFoundException("Int array resource ID #0x" 481 + Integer.toHexString(id)); 482 } 483 484 /** 485 * Return an array of heterogeneous values. 486 * 487 * @param id The desired resource identifier, as generated by the aapt 488 * tool. This integer encodes the package, type, and resource 489 * entry. The value 0 is an invalid identifier. 490 * 491 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 492 * 493 * @return Returns a TypedArray holding an array of the array values. 494 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 495 * when done with it. 496 */ 497 public TypedArray obtainTypedArray(int id) throws NotFoundException { 498 int len = mAssets.getArraySize(id); 499 if (len < 0) { 500 throw new NotFoundException("Array resource ID #0x" 501 + Integer.toHexString(id)); 502 } 503 504 TypedArray array = getCachedStyledAttributes(len); 505 array.mLength = mAssets.retrieveArray(id, array.mData); 506 array.mIndices[0] = 0; 507 508 return array; 509 } 510 511 /** 512 * Retrieve a dimensional for a particular resource ID. Unit 513 * conversions are based on the current {@link DisplayMetrics} associated 514 * with the resources. 515 * 516 * @param id The desired resource identifier, as generated by the aapt 517 * tool. This integer encodes the package, type, and resource 518 * entry. The value 0 is an invalid identifier. 519 * 520 * @return Resource dimension value multiplied by the appropriate 521 * metric. 522 * 523 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 524 * 525 * @see #getDimensionPixelOffset 526 * @see #getDimensionPixelSize 527 */ 528 public float getDimension(int id) throws NotFoundException { 529 synchronized (mAccessLock) { 530 TypedValue value = mTmpValue; 531 if (value == null) { 532 mTmpValue = value = new TypedValue(); 533 } 534 getValue(id, value, true); 535 if (value.type == TypedValue.TYPE_DIMENSION) { 536 return TypedValue.complexToDimension(value.data, mMetrics); 537 } 538 throw new NotFoundException( 539 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 540 + Integer.toHexString(value.type) + " is not valid"); 541 } 542 } 543 544 /** 545 * Retrieve a dimensional for a particular resource ID for use 546 * as an offset in raw pixels. This is the same as 547 * {@link #getDimension}, except the returned value is converted to 548 * integer pixels for you. An offset conversion involves simply 549 * truncating the base value to an integer. 550 * 551 * @param id The desired resource identifier, as generated by the aapt 552 * tool. This integer encodes the package, type, and resource 553 * entry. The value 0 is an invalid identifier. 554 * 555 * @return Resource dimension value multiplied by the appropriate 556 * metric and truncated to integer pixels. 557 * 558 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 559 * 560 * @see #getDimension 561 * @see #getDimensionPixelSize 562 */ 563 public int getDimensionPixelOffset(int id) throws NotFoundException { 564 synchronized (mAccessLock) { 565 TypedValue value = mTmpValue; 566 if (value == null) { 567 mTmpValue = value = new TypedValue(); 568 } 569 getValue(id, value, true); 570 if (value.type == TypedValue.TYPE_DIMENSION) { 571 return TypedValue.complexToDimensionPixelOffset( 572 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 a size in raw pixels. This is the same as 583 * {@link #getDimension}, except the returned value is converted to 584 * integer pixels for use as a size. A size conversion involves 585 * rounding the base value, and ensuring that a non-zero base value 586 * is at least one pixel in size. 587 * 588 * @param id The desired resource identifier, as generated by the aapt 589 * tool. This integer encodes the package, type, and resource 590 * entry. The value 0 is an invalid identifier. 591 * 592 * @return Resource dimension value multiplied by the appropriate 593 * metric and truncated to integer pixels. 594 * 595 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 596 * 597 * @see #getDimension 598 * @see #getDimensionPixelOffset 599 */ 600 public int getDimensionPixelSize(int id) throws NotFoundException { 601 synchronized (mAccessLock) { 602 TypedValue value = mTmpValue; 603 if (value == null) { 604 mTmpValue = value = new TypedValue(); 605 } 606 getValue(id, value, true); 607 if (value.type == TypedValue.TYPE_DIMENSION) { 608 return TypedValue.complexToDimensionPixelSize( 609 value.data, mMetrics); 610 } 611 throw new NotFoundException( 612 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 613 + Integer.toHexString(value.type) + " is not valid"); 614 } 615 } 616 617 /** 618 * Retrieve a fractional unit for a particular resource ID. 619 * 620 * @param id The desired resource identifier, as generated by the aapt 621 * tool. This integer encodes the package, type, and resource 622 * entry. The value 0 is an invalid identifier. 623 * @param base The base value of this fraction. In other words, a 624 * standard fraction is multiplied by this value. 625 * @param pbase The parent base value of this fraction. In other 626 * words, a parent fraction (nn%p) is multiplied by this 627 * value. 628 * 629 * @return Attribute fractional value multiplied by the appropriate 630 * base value. 631 * 632 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 633 */ 634 public float getFraction(int id, int base, int pbase) { 635 synchronized (mAccessLock) { 636 TypedValue value = mTmpValue; 637 if (value == null) { 638 mTmpValue = value = new TypedValue(); 639 } 640 getValue(id, value, true); 641 if (value.type == TypedValue.TYPE_FRACTION) { 642 return TypedValue.complexToFraction(value.data, base, pbase); 643 } 644 throw new NotFoundException( 645 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 646 + Integer.toHexString(value.type) + " is not valid"); 647 } 648 } 649 650 /** 651 * Return a drawable object associated with a particular resource ID. 652 * Various types of objects will be returned depending on the underlying 653 * resource -- for example, a solid color, PNG image, scalable image, etc. 654 * The Drawable API hides these implementation details. 655 * 656 * <p class="note"><strong>Note:</strong> Prior to 657 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, this function 658 * would not correctly retrieve the final configuration density when 659 * the resource ID passed here is an alias to another Drawable resource. 660 * This means that if the density configuration of the alias resource 661 * is different than the actual resource, the density of the returned 662 * Drawable would be incorrect, resulting in bad scaling. To work 663 * around this, you can instead retrieve the Drawable through 664 * {@link TypedArray#getDrawable TypedArray.getDrawable}. Use 665 * {@link android.content.Context#obtainStyledAttributes(int[]) 666 * Context.obtainStyledAttributes} with 667 * an array containing the resource ID of interest to create the TypedArray.</p> 668 * 669 * @param id The desired resource identifier, as generated by the aapt 670 * tool. This integer encodes the package, type, and resource 671 * entry. The value 0 is an invalid identifier. 672 * 673 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 674 * 675 * @return Drawable An object that can be used to draw this resource. 676 */ 677 public Drawable getDrawable(int id) throws NotFoundException { 678 TypedValue value; 679 synchronized (mAccessLock) { 680 value = mTmpValue; 681 if (value == null) { 682 value = new TypedValue(); 683 } else { 684 mTmpValue = null; 685 } 686 getValue(id, value, true); 687 } 688 Drawable res = loadDrawable(value, id); 689 synchronized (mAccessLock) { 690 if (mTmpValue == null) { 691 mTmpValue = value; 692 } 693 } 694 return res; 695 } 696 697 /** 698 * Return a drawable object associated with a particular resource ID for the 699 * given screen density in DPI. This will set the drawable's density to be 700 * the device's density multiplied by the ratio of actual drawable density 701 * to requested density. This allows the drawable to be scaled up to the 702 * correct size if needed. Various types of objects will be returned 703 * depending on the underlying resource -- for example, a solid color, PNG 704 * image, scalable image, etc. The Drawable API hides these implementation 705 * details. 706 * 707 * @param id The desired resource identifier, as generated by the aapt tool. 708 * This integer encodes the package, type, and resource entry. 709 * The value 0 is an invalid identifier. 710 * @param density the desired screen density indicated by the resource as 711 * found in {@link DisplayMetrics}. 712 * @throws NotFoundException Throws NotFoundException if the given ID does 713 * not exist. 714 * @return Drawable An object that can be used to draw this resource. 715 */ 716 public Drawable getDrawableForDensity(int id, int density) throws NotFoundException { 717 TypedValue value; 718 synchronized (mAccessLock) { 719 value = mTmpValue; 720 if (value == null) { 721 value = new TypedValue(); 722 } else { 723 mTmpValue = null; 724 } 725 getValueForDensity(id, density, value, true); 726 727 /* 728 * Pretend the requested density is actually the display density. If 729 * the drawable returned is not the requested density, then force it 730 * to be scaled later by dividing its density by the ratio of 731 * requested density to actual device density. Drawables that have 732 * undefined density or no density don't need to be handled here. 733 */ 734 if (value.density > 0 && value.density != TypedValue.DENSITY_NONE) { 735 if (value.density == density) { 736 value.density = mMetrics.densityDpi; 737 } else { 738 value.density = (value.density * mMetrics.densityDpi) / density; 739 } 740 } 741 } 742 743 Drawable res = loadDrawable(value, id); 744 synchronized (mAccessLock) { 745 if (mTmpValue == null) { 746 mTmpValue = value; 747 } 748 } 749 return res; 750 } 751 752 /** 753 * Return a movie object associated with the particular resource ID. 754 * @param id The desired resource identifier, as generated by the aapt 755 * tool. This integer encodes the package, type, and resource 756 * entry. The value 0 is an invalid identifier. 757 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 758 * 759 */ 760 public Movie getMovie(int id) throws NotFoundException { 761 InputStream is = openRawResource(id); 762 Movie movie = Movie.decodeStream(is); 763 try { 764 is.close(); 765 } 766 catch (java.io.IOException e) { 767 // don't care, since the return value is valid 768 } 769 return movie; 770 } 771 772 /** 773 * Return a color integer associated with a particular resource ID. 774 * If the resource holds a complex 775 * {@link android.content.res.ColorStateList}, then the default color from 776 * the set is returned. 777 * 778 * @param id The desired resource identifier, as generated by the aapt 779 * tool. This integer encodes the package, type, and resource 780 * entry. The value 0 is an invalid identifier. 781 * 782 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 783 * 784 * @return Returns a single color value in the form 0xAARRGGBB. 785 */ 786 public int getColor(int id) throws NotFoundException { 787 TypedValue value; 788 synchronized (mAccessLock) { 789 value = mTmpValue; 790 if (value == null) { 791 value = new TypedValue(); 792 } 793 getValue(id, value, true); 794 if (value.type >= TypedValue.TYPE_FIRST_INT 795 && value.type <= TypedValue.TYPE_LAST_INT) { 796 mTmpValue = value; 797 return value.data; 798 } else if (value.type != TypedValue.TYPE_STRING) { 799 throw new NotFoundException( 800 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 801 + Integer.toHexString(value.type) + " is not valid"); 802 } 803 mTmpValue = null; 804 } 805 ColorStateList csl = loadColorStateList(value, id); 806 synchronized (mAccessLock) { 807 if (mTmpValue == null) { 808 mTmpValue = value; 809 } 810 } 811 return csl.getDefaultColor(); 812 } 813 814 /** 815 * Return a color state list associated with a particular resource ID. The 816 * resource may contain either a single raw color value, or a complex 817 * {@link android.content.res.ColorStateList} holding multiple possible colors. 818 * 819 * @param id The desired resource identifier of a {@link ColorStateList}, 820 * as generated by the aapt tool. This integer encodes the package, type, and resource 821 * entry. The value 0 is an invalid identifier. 822 * 823 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 824 * 825 * @return Returns a ColorStateList object containing either a single 826 * solid color or multiple colors that can be selected based on a state. 827 */ 828 public ColorStateList getColorStateList(int id) throws NotFoundException { 829 TypedValue value; 830 synchronized (mAccessLock) { 831 value = mTmpValue; 832 if (value == null) { 833 value = new TypedValue(); 834 } else { 835 mTmpValue = null; 836 } 837 getValue(id, value, true); 838 } 839 ColorStateList res = loadColorStateList(value, id); 840 synchronized (mAccessLock) { 841 if (mTmpValue == null) { 842 mTmpValue = value; 843 } 844 } 845 return res; 846 } 847 848 /** 849 * Return a boolean associated with a particular resource ID. This can be 850 * used with any integral resource value, and will return true if it is 851 * non-zero. 852 * 853 * @param id The desired resource identifier, as generated by the aapt 854 * tool. This integer encodes the package, type, and resource 855 * entry. The value 0 is an invalid identifier. 856 * 857 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 858 * 859 * @return Returns the boolean value contained in the resource. 860 */ 861 public boolean getBoolean(int id) throws NotFoundException { 862 synchronized (mAccessLock) { 863 TypedValue value = mTmpValue; 864 if (value == null) { 865 mTmpValue = value = new TypedValue(); 866 } 867 getValue(id, value, true); 868 if (value.type >= TypedValue.TYPE_FIRST_INT 869 && value.type <= TypedValue.TYPE_LAST_INT) { 870 return value.data != 0; 871 } 872 throw new NotFoundException( 873 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 874 + Integer.toHexString(value.type) + " is not valid"); 875 } 876 } 877 878 /** 879 * Return an integer associated with a particular resource ID. 880 * 881 * @param id The desired resource identifier, as generated by the aapt 882 * tool. This integer encodes the package, type, and resource 883 * entry. The value 0 is an invalid identifier. 884 * 885 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 886 * 887 * @return Returns the integer value contained in the resource. 888 */ 889 public int getInteger(int id) throws NotFoundException { 890 synchronized (mAccessLock) { 891 TypedValue value = mTmpValue; 892 if (value == null) { 893 mTmpValue = value = new TypedValue(); 894 } 895 getValue(id, value, true); 896 if (value.type >= TypedValue.TYPE_FIRST_INT 897 && value.type <= TypedValue.TYPE_LAST_INT) { 898 return value.data; 899 } 900 throw new NotFoundException( 901 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 902 + Integer.toHexString(value.type) + " is not valid"); 903 } 904 } 905 906 /** 907 * Return an XmlResourceParser through which you can read a view layout 908 * description for the given resource ID. This parser has limited 909 * functionality -- in particular, you can't change its input, and only 910 * the high-level events are available. 911 * 912 * <p>This function is really a simple wrapper for calling 913 * {@link #getXml} with a layout resource. 914 * 915 * @param id The desired resource identifier, as generated by the aapt 916 * tool. This integer encodes the package, type, and resource 917 * entry. The value 0 is an invalid identifier. 918 * 919 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 920 * 921 * @return A new parser object through which you can read 922 * the XML data. 923 * 924 * @see #getXml 925 */ 926 public XmlResourceParser getLayout(int id) throws NotFoundException { 927 return loadXmlResourceParser(id, "layout"); 928 } 929 930 /** 931 * Return an XmlResourceParser through which you can read an animation 932 * description for the given resource ID. This parser has limited 933 * functionality -- in particular, you can't change its input, and only 934 * the high-level events are available. 935 * 936 * <p>This function is really a simple wrapper for calling 937 * {@link #getXml} with an animation resource. 938 * 939 * @param id The desired resource identifier, as generated by the aapt 940 * tool. This integer encodes the package, type, and resource 941 * entry. The value 0 is an invalid identifier. 942 * 943 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 944 * 945 * @return A new parser object through which you can read 946 * the XML data. 947 * 948 * @see #getXml 949 */ 950 public XmlResourceParser getAnimation(int id) throws NotFoundException { 951 return loadXmlResourceParser(id, "anim"); 952 } 953 954 /** 955 * Return an XmlResourceParser through which you can read a generic XML 956 * resource for the given resource ID. 957 * 958 * <p>The XmlPullParser implementation returned here has some limited 959 * functionality. In particular, you can't change its input, and only 960 * high-level parsing events are available (since the document was 961 * pre-parsed for you at build time, which involved merging text and 962 * stripping comments). 963 * 964 * @param id The desired resource identifier, as generated by the aapt 965 * tool. This integer encodes the package, type, and resource 966 * entry. The value 0 is an invalid identifier. 967 * 968 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 969 * 970 * @return A new parser object through which you can read 971 * the XML data. 972 * 973 * @see android.util.AttributeSet 974 */ 975 public XmlResourceParser getXml(int id) throws NotFoundException { 976 return loadXmlResourceParser(id, "xml"); 977 } 978 979 /** 980 * Open a data stream for reading a raw resource. This can only be used 981 * with resources whose value is the name of an asset files -- that is, it can be 982 * used to open drawable, sound, and raw resources; it will fail on string 983 * and color resources. 984 * 985 * @param id The resource identifier to open, as generated by the appt 986 * tool. 987 * 988 * @return InputStream Access to the resource data. 989 * 990 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 991 * 992 */ 993 public InputStream openRawResource(int id) throws NotFoundException { 994 TypedValue value; 995 synchronized (mAccessLock) { 996 value = mTmpValue; 997 if (value == null) { 998 value = new TypedValue(); 999 } else { 1000 mTmpValue = null; 1001 } 1002 } 1003 InputStream res = openRawResource(id, value); 1004 synchronized (mAccessLock) { 1005 if (mTmpValue == null) { 1006 mTmpValue = value; 1007 } 1008 } 1009 return res; 1010 } 1011 1012 /** 1013 * Open a data stream for reading a raw resource. This can only be used 1014 * with resources whose value is the name of an asset file -- that is, it can be 1015 * used to open drawable, sound, and raw resources; it will fail on string 1016 * and color resources. 1017 * 1018 * @param id The resource identifier to open, as generated by the appt tool. 1019 * @param value The TypedValue object to hold the resource information. 1020 * 1021 * @return InputStream Access to the resource data. 1022 * 1023 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1024 */ 1025 public InputStream openRawResource(int id, TypedValue value) throws NotFoundException { 1026 getValue(id, value, true); 1027 1028 try { 1029 return mAssets.openNonAsset(value.assetCookie, value.string.toString(), 1030 AssetManager.ACCESS_STREAMING); 1031 } catch (Exception e) { 1032 NotFoundException rnf = new NotFoundException("File " + value.string.toString() + 1033 " from drawable resource ID #0x" + Integer.toHexString(id)); 1034 rnf.initCause(e); 1035 throw rnf; 1036 } 1037 } 1038 1039 /** 1040 * Open a file descriptor for reading a raw resource. This can only be used 1041 * with resources whose value is the name of an asset files -- that is, it can be 1042 * used to open drawable, sound, and raw resources; it will fail on string 1043 * and color resources. 1044 * 1045 * <p>This function only works for resources that are stored in the package 1046 * as uncompressed data, which typically includes things like mp3 files 1047 * and png images. 1048 * 1049 * @param id The resource identifier to open, as generated by the appt 1050 * tool. 1051 * 1052 * @return AssetFileDescriptor A new file descriptor you can use to read 1053 * the resource. This includes the file descriptor itself, as well as the 1054 * offset and length of data where the resource appears in the file. A 1055 * null is returned if the file exists but is compressed. 1056 * 1057 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1058 * 1059 */ 1060 public AssetFileDescriptor openRawResourceFd(int id) throws NotFoundException { 1061 TypedValue value; 1062 synchronized (mAccessLock) { 1063 value = mTmpValue; 1064 if (value == null) { 1065 value = new TypedValue(); 1066 } else { 1067 mTmpValue = null; 1068 } 1069 getValue(id, value, true); 1070 } 1071 try { 1072 return mAssets.openNonAssetFd( 1073 value.assetCookie, value.string.toString()); 1074 } catch (Exception e) { 1075 NotFoundException rnf = new NotFoundException( 1076 "File " + value.string.toString() 1077 + " from drawable resource ID #0x" 1078 + Integer.toHexString(id)); 1079 rnf.initCause(e); 1080 throw rnf; 1081 } finally { 1082 synchronized (mAccessLock) { 1083 if (mTmpValue == null) { 1084 mTmpValue = value; 1085 } 1086 } 1087 } 1088 } 1089 1090 /** 1091 * Return the raw data associated with a particular resource ID. 1092 * 1093 * @param id The desired resource identifier, as generated by the aapt 1094 * tool. This integer encodes the package, type, and resource 1095 * entry. The value 0 is an invalid identifier. 1096 * @param outValue Object in which to place the resource data. 1097 * @param resolveRefs If true, a resource that is a reference to another 1098 * resource will be followed so that you receive the 1099 * actual final resource data. If false, the TypedValue 1100 * will be filled in with the reference itself. 1101 * 1102 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1103 * 1104 */ 1105 public void getValue(int id, TypedValue outValue, boolean resolveRefs) 1106 throws NotFoundException { 1107 boolean found = mAssets.getResourceValue(id, 0, outValue, resolveRefs); 1108 if (found) { 1109 return; 1110 } 1111 throw new NotFoundException("Resource ID #0x" 1112 + Integer.toHexString(id)); 1113 } 1114 1115 /** 1116 * Get the raw value associated with a resource with associated density. 1117 * 1118 * @param id resource identifier 1119 * @param density density in DPI 1120 * @param resolveRefs If true, a resource that is a reference to another 1121 * resource will be followed so that you receive the actual final 1122 * resource data. If false, the TypedValue will be filled in with 1123 * the reference itself. 1124 * @throws NotFoundException Throws NotFoundException if the given ID does 1125 * not exist. 1126 * @see #getValue(String, TypedValue, boolean) 1127 */ 1128 public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs) 1129 throws NotFoundException { 1130 boolean found = mAssets.getResourceValue(id, density, outValue, resolveRefs); 1131 if (found) { 1132 return; 1133 } 1134 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)); 1135 } 1136 1137 /** 1138 * Return the raw data associated with a particular resource ID. 1139 * See getIdentifier() for information on how names are mapped to resource 1140 * IDs, and getString(int) for information on how string resources are 1141 * retrieved. 1142 * 1143 * <p>Note: use of this function is discouraged. It is much more 1144 * efficient to retrieve resources by identifier than by name. 1145 * 1146 * @param name The name of the desired resource. This is passed to 1147 * getIdentifier() with a default type of "string". 1148 * @param outValue Object in which to place the resource data. 1149 * @param resolveRefs If true, a resource that is a reference to another 1150 * resource will be followed so that you receive the 1151 * actual final resource data. If false, the TypedValue 1152 * will be filled in with the reference itself. 1153 * 1154 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1155 * 1156 */ 1157 public void getValue(String name, TypedValue outValue, boolean resolveRefs) 1158 throws NotFoundException { 1159 int id = getIdentifier(name, "string", null); 1160 if (id != 0) { 1161 getValue(id, outValue, resolveRefs); 1162 return; 1163 } 1164 throw new NotFoundException("String resource name " + name); 1165 } 1166 1167 /** 1168 * This class holds the current attribute values for a particular theme. 1169 * In other words, a Theme is a set of values for resource attributes; 1170 * these are used in conjunction with {@link TypedArray} 1171 * to resolve the final value for an attribute. 1172 * 1173 * <p>The Theme's attributes come into play in two ways: (1) a styled 1174 * attribute can explicit reference a value in the theme through the 1175 * "?themeAttribute" syntax; (2) if no value has been defined for a 1176 * particular styled attribute, as a last resort we will try to find that 1177 * attribute's value in the Theme. 1178 * 1179 * <p>You will normally use the {@link #obtainStyledAttributes} APIs to 1180 * retrieve XML attributes with style and theme information applied. 1181 */ 1182 public final class Theme { 1183 /** 1184 * Place new attribute values into the theme. The style resource 1185 * specified by <var>resid</var> will be retrieved from this Theme's 1186 * resources, its values placed into the Theme object. 1187 * 1188 * <p>The semantics of this function depends on the <var>force</var> 1189 * argument: If false, only values that are not already defined in 1190 * the theme will be copied from the system resource; otherwise, if 1191 * any of the style's attributes are already defined in the theme, the 1192 * current values in the theme will be overwritten. 1193 * 1194 * @param resid The resource ID of a style resource from which to 1195 * obtain attribute values. 1196 * @param force If true, values in the style resource will always be 1197 * used in the theme; otherwise, they will only be used 1198 * if not already defined in the theme. 1199 */ 1200 public void applyStyle(int resid, boolean force) { 1201 AssetManager.applyThemeStyle(mTheme, resid, force); 1202 } 1203 1204 /** 1205 * Set this theme to hold the same contents as the theme 1206 * <var>other</var>. If both of these themes are from the same 1207 * Resources object, they will be identical after this function 1208 * returns. If they are from different Resources, only the resources 1209 * they have in common will be set in this theme. 1210 * 1211 * @param other The existing Theme to copy from. 1212 */ 1213 public void setTo(Theme other) { 1214 AssetManager.copyTheme(mTheme, other.mTheme); 1215 } 1216 1217 /** 1218 * Return a TypedArray holding the values defined by 1219 * <var>Theme</var> which are listed in <var>attrs</var>. 1220 * 1221 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1222 * with the array. 1223 * 1224 * @param attrs The desired attributes. 1225 * 1226 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1227 * 1228 * @return Returns a TypedArray holding an array of the attribute values. 1229 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1230 * when done with it. 1231 * 1232 * @see Resources#obtainAttributes 1233 * @see #obtainStyledAttributes(int, int[]) 1234 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1235 */ 1236 public TypedArray obtainStyledAttributes(int[] attrs) { 1237 int len = attrs.length; 1238 TypedArray array = getCachedStyledAttributes(len); 1239 array.mRsrcs = attrs; 1240 AssetManager.applyStyle(mTheme, 0, 0, 0, attrs, 1241 array.mData, array.mIndices); 1242 return array; 1243 } 1244 1245 /** 1246 * Return a TypedArray holding the values defined by the style 1247 * resource <var>resid</var> which are listed in <var>attrs</var>. 1248 * 1249 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1250 * with the array. 1251 * 1252 * @param resid The desired style resource. 1253 * @param attrs The desired attributes in the style. 1254 * 1255 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1256 * 1257 * @return Returns a TypedArray holding an array of the attribute values. 1258 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1259 * when done with it. 1260 * 1261 * @see Resources#obtainAttributes 1262 * @see #obtainStyledAttributes(int[]) 1263 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1264 */ 1265 public TypedArray obtainStyledAttributes(int resid, int[] attrs) 1266 throws NotFoundException { 1267 int len = attrs.length; 1268 TypedArray array = getCachedStyledAttributes(len); 1269 array.mRsrcs = attrs; 1270 1271 AssetManager.applyStyle(mTheme, 0, resid, 0, attrs, 1272 array.mData, array.mIndices); 1273 if (false) { 1274 int[] data = array.mData; 1275 1276 System.out.println("**********************************************************"); 1277 System.out.println("**********************************************************"); 1278 System.out.println("**********************************************************"); 1279 System.out.println("Attributes:"); 1280 String s = " Attrs:"; 1281 int i; 1282 for (i=0; i<attrs.length; i++) { 1283 s = s + " 0x" + Integer.toHexString(attrs[i]); 1284 } 1285 System.out.println(s); 1286 s = " Found:"; 1287 TypedValue value = new TypedValue(); 1288 for (i=0; i<attrs.length; i++) { 1289 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1290 value.type = data[d+AssetManager.STYLE_TYPE]; 1291 value.data = data[d+AssetManager.STYLE_DATA]; 1292 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1293 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1294 s = s + " 0x" + Integer.toHexString(attrs[i]) 1295 + "=" + value; 1296 } 1297 System.out.println(s); 1298 } 1299 return array; 1300 } 1301 1302 /** 1303 * Return a TypedArray holding the attribute values in 1304 * <var>set</var> 1305 * that are listed in <var>attrs</var>. In addition, if the given 1306 * AttributeSet specifies a style class (through the "style" attribute), 1307 * that style will be applied on top of the base attributes it defines. 1308 * 1309 * <p>Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} when you are done 1310 * with the array. 1311 * 1312 * <p>When determining the final value of a particular attribute, there 1313 * are four inputs that come into play:</p> 1314 * 1315 * <ol> 1316 * <li> Any attribute values in the given AttributeSet. 1317 * <li> The style resource specified in the AttributeSet (named 1318 * "style"). 1319 * <li> The default style specified by <var>defStyleAttr</var> and 1320 * <var>defStyleRes</var> 1321 * <li> The base values in this theme. 1322 * </ol> 1323 * 1324 * <p>Each of these inputs is considered in-order, with the first listed 1325 * taking precedence over the following ones. In other words, if in the 1326 * AttributeSet you have supplied <code><Button 1327 * textColor="#ff000000"></code>, then the button's text will 1328 * <em>always</em> be black, regardless of what is specified in any of 1329 * the styles. 1330 * 1331 * @param set The base set of attribute values. May be null. 1332 * @param attrs The desired attributes to be retrieved. 1333 * @param defStyleAttr An attribute in the current theme that contains a 1334 * reference to a style resource that supplies 1335 * defaults values for the TypedArray. Can be 1336 * 0 to not look for defaults. 1337 * @param defStyleRes A resource identifier of a style resource that 1338 * supplies default values for the TypedArray, 1339 * used only if defStyleAttr is 0 or can not be found 1340 * in the theme. Can be 0 to not look for defaults. 1341 * 1342 * @return Returns a TypedArray holding an array of the attribute values. 1343 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1344 * when done with it. 1345 * 1346 * @see Resources#obtainAttributes 1347 * @see #obtainStyledAttributes(int[]) 1348 * @see #obtainStyledAttributes(int, int[]) 1349 */ 1350 public TypedArray obtainStyledAttributes(AttributeSet set, 1351 int[] attrs, int defStyleAttr, int defStyleRes) { 1352 int len = attrs.length; 1353 TypedArray array = getCachedStyledAttributes(len); 1354 1355 // XXX note that for now we only work with compiled XML files. 1356 // To support generic XML files we will need to manually parse 1357 // out the attributes from the XML file (applying type information 1358 // contained in the resources and such). 1359 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1360 AssetManager.applyStyle( 1361 mTheme, defStyleAttr, defStyleRes, 1362 parser != null ? parser.mParseState : 0, attrs, 1363 array.mData, array.mIndices); 1364 1365 array.mRsrcs = attrs; 1366 array.mXml = parser; 1367 1368 if (false) { 1369 int[] data = array.mData; 1370 1371 System.out.println("Attributes:"); 1372 String s = " Attrs:"; 1373 int i; 1374 for (i=0; i<set.getAttributeCount(); i++) { 1375 s = s + " " + set.getAttributeName(i); 1376 int id = set.getAttributeNameResource(i); 1377 if (id != 0) { 1378 s = s + "(0x" + Integer.toHexString(id) + ")"; 1379 } 1380 s = s + "=" + set.getAttributeValue(i); 1381 } 1382 System.out.println(s); 1383 s = " Found:"; 1384 TypedValue value = new TypedValue(); 1385 for (i=0; i<attrs.length; i++) { 1386 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1387 value.type = data[d+AssetManager.STYLE_TYPE]; 1388 value.data = data[d+AssetManager.STYLE_DATA]; 1389 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1390 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1391 s = s + " 0x" + Integer.toHexString(attrs[i]) 1392 + "=" + value; 1393 } 1394 System.out.println(s); 1395 } 1396 1397 return array; 1398 } 1399 1400 /** 1401 * Retrieve the value of an attribute in the Theme. The contents of 1402 * <var>outValue</var> are ultimately filled in by 1403 * {@link Resources#getValue}. 1404 * 1405 * @param resid The resource identifier of the desired theme 1406 * attribute. 1407 * @param outValue Filled in with the ultimate resource value supplied 1408 * by the attribute. 1409 * @param resolveRefs If true, resource references will be walked; if 1410 * false, <var>outValue</var> may be a 1411 * TYPE_REFERENCE. In either case, it will never 1412 * be a TYPE_ATTRIBUTE. 1413 * 1414 * @return boolean Returns true if the attribute was found and 1415 * <var>outValue</var> is valid, else false. 1416 */ 1417 public boolean resolveAttribute(int resid, TypedValue outValue, 1418 boolean resolveRefs) { 1419 boolean got = mAssets.getThemeValue(mTheme, resid, outValue, resolveRefs); 1420 if (false) { 1421 System.out.println( 1422 "resolveAttribute #" + Integer.toHexString(resid) 1423 + " got=" + got + ", type=0x" + Integer.toHexString(outValue.type) 1424 + ", data=0x" + Integer.toHexString(outValue.data)); 1425 } 1426 return got; 1427 } 1428 1429 /** 1430 * Print contents of this theme out to the log. For debugging only. 1431 * 1432 * @param priority The log priority to use. 1433 * @param tag The log tag to use. 1434 * @param prefix Text to prefix each line printed. 1435 */ 1436 public void dump(int priority, String tag, String prefix) { 1437 AssetManager.dumpTheme(mTheme, priority, tag, prefix); 1438 } 1439 1440 protected void finalize() throws Throwable { 1441 super.finalize(); 1442 mAssets.releaseTheme(mTheme); 1443 } 1444 1445 /*package*/ Theme() { 1446 mAssets = Resources.this.mAssets; 1447 mTheme = mAssets.createTheme(); 1448 } 1449 1450 private final AssetManager mAssets; 1451 private final int mTheme; 1452 } 1453 1454 /** 1455 * Generate a new Theme object for this set of Resources. It initially 1456 * starts out empty. 1457 * 1458 * @return Theme The newly created Theme container. 1459 */ 1460 public final Theme newTheme() { 1461 return new Theme(); 1462 } 1463 1464 /** 1465 * Retrieve a set of basic attribute values from an AttributeSet, not 1466 * performing styling of them using a theme and/or style resources. 1467 * 1468 * @param set The current attribute values to retrieve. 1469 * @param attrs The specific attributes to be retrieved. 1470 * @return Returns a TypedArray holding an array of the attribute values. 1471 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1472 * when done with it. 1473 * 1474 * @see Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 1475 */ 1476 public TypedArray obtainAttributes(AttributeSet set, int[] attrs) { 1477 int len = attrs.length; 1478 TypedArray array = getCachedStyledAttributes(len); 1479 1480 // XXX note that for now we only work with compiled XML files. 1481 // To support generic XML files we will need to manually parse 1482 // out the attributes from the XML file (applying type information 1483 // contained in the resources and such). 1484 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1485 mAssets.retrieveAttributes(parser.mParseState, attrs, 1486 array.mData, array.mIndices); 1487 1488 array.mRsrcs = attrs; 1489 array.mXml = parser; 1490 1491 return array; 1492 } 1493 1494 /** 1495 * Store the newly updated configuration. 1496 */ 1497 public void updateConfiguration(Configuration config, 1498 DisplayMetrics metrics) { 1499 updateConfiguration(config, metrics, null); 1500 } 1501 1502 /** 1503 * @hide 1504 */ 1505 public void updateConfiguration(Configuration config, 1506 DisplayMetrics metrics, CompatibilityInfo compat) { 1507 synchronized (mAccessLock) { 1508 if (false) { 1509 Slog.i(TAG, "**** Updating config of " + this + ": old config is " 1510 + mConfiguration + " old compat is " + mCompatibilityInfo); 1511 Slog.i(TAG, "**** Updating config of " + this + ": new config is " 1512 + config + " new compat is " + compat); 1513 } 1514 if (compat != null) { 1515 mCompatibilityInfo = compat; 1516 } 1517 if (metrics != null) { 1518 mMetrics.setTo(metrics); 1519 } 1520 // NOTE: We should re-arrange this code to create a Display 1521 // with the CompatibilityInfo that is used everywhere we deal 1522 // with the display in relation to this app, rather than 1523 // doing the conversion here. This impl should be okay because 1524 // we make sure to return a compatible display in the places 1525 // where there are public APIs to retrieve the display... but 1526 // it would be cleaner and more maintainble to just be 1527 // consistently dealing with a compatible display everywhere in 1528 // the framework. 1529 if (mCompatibilityInfo != null) { 1530 mCompatibilityInfo.applyToDisplayMetrics(mMetrics); 1531 } 1532 int configChanges = 0xfffffff; 1533 if (config != null) { 1534 mTmpConfig.setTo(config); 1535 int density = config.densityDpi; 1536 if (density == Configuration.DENSITY_DPI_UNDEFINED) { 1537 density = mMetrics.noncompatDensityDpi; 1538 } 1539 if (mCompatibilityInfo != null) { 1540 mCompatibilityInfo.applyToConfiguration(density, mTmpConfig); 1541 } 1542 if (mTmpConfig.locale == null) { 1543 mTmpConfig.locale = Locale.getDefault(); 1544 mTmpConfig.setLayoutDirection(mTmpConfig.locale); 1545 } 1546 configChanges = mConfiguration.updateFrom(mTmpConfig); 1547 configChanges = ActivityInfo.activityInfoConfigToNative(configChanges); 1548 } 1549 if (mConfiguration.locale == null) { 1550 mConfiguration.locale = Locale.getDefault(); 1551 mConfiguration.setLayoutDirection(mConfiguration.locale); 1552 } 1553 if (mConfiguration.densityDpi != Configuration.DENSITY_DPI_UNDEFINED) { 1554 mMetrics.densityDpi = mConfiguration.densityDpi; 1555 mMetrics.density = mConfiguration.densityDpi * DisplayMetrics.DENSITY_DEFAULT_SCALE; 1556 } 1557 mMetrics.scaledDensity = mMetrics.density * mConfiguration.fontScale; 1558 1559 String locale = null; 1560 if (mConfiguration.locale != null) { 1561 locale = mConfiguration.locale.getLanguage(); 1562 if (mConfiguration.locale.getCountry() != null) { 1563 locale += "-" + mConfiguration.locale.getCountry(); 1564 } 1565 } 1566 int width, height; 1567 if (mMetrics.widthPixels >= mMetrics.heightPixels) { 1568 width = mMetrics.widthPixels; 1569 height = mMetrics.heightPixels; 1570 } else { 1571 //noinspection SuspiciousNameCombination 1572 width = mMetrics.heightPixels; 1573 //noinspection SuspiciousNameCombination 1574 height = mMetrics.widthPixels; 1575 } 1576 int keyboardHidden = mConfiguration.keyboardHidden; 1577 if (keyboardHidden == Configuration.KEYBOARDHIDDEN_NO 1578 && mConfiguration.hardKeyboardHidden 1579 == Configuration.HARDKEYBOARDHIDDEN_YES) { 1580 keyboardHidden = Configuration.KEYBOARDHIDDEN_SOFT; 1581 } 1582 mAssets.setConfiguration(mConfiguration.mcc, mConfiguration.mnc, 1583 locale, mConfiguration.orientation, 1584 mConfiguration.touchscreen, 1585 mConfiguration.densityDpi, mConfiguration.keyboard, 1586 keyboardHidden, mConfiguration.navigation, width, height, 1587 mConfiguration.smallestScreenWidthDp, 1588 mConfiguration.screenWidthDp, mConfiguration.screenHeightDp, 1589 mConfiguration.screenLayout, mConfiguration.uiMode, 1590 Build.VERSION.RESOURCES_SDK_INT); 1591 1592 if (DEBUG_CONFIG) { 1593 Slog.i(TAG, "**** Updating config of " + this + ": final config is " + mConfiguration 1594 + " final compat is " + mCompatibilityInfo); 1595 } 1596 1597 clearDrawableCacheLocked(mDrawableCache, configChanges); 1598 clearDrawableCacheLocked(mColorDrawableCache, configChanges); 1599 1600 mColorStateListCache.clear(); 1601 1602 flushLayoutCache(); 1603 } 1604 synchronized (sSync) { 1605 if (mPluralRule != null) { 1606 mPluralRule = NativePluralRules.forLocale(config.locale); 1607 } 1608 } 1609 } 1610 1611 private void clearDrawableCacheLocked( 1612 LongSparseArray<WeakReference<ConstantState>> cache, 1613 int configChanges) { 1614 int N = cache.size(); 1615 if (DEBUG_CONFIG) { 1616 Log.d(TAG, "Cleaning up drawables config changes: 0x" 1617 + Integer.toHexString(configChanges)); 1618 } 1619 for (int i=0; i<N; i++) { 1620 WeakReference<Drawable.ConstantState> ref = cache.valueAt(i); 1621 if (ref != null) { 1622 Drawable.ConstantState cs = ref.get(); 1623 if (cs != null) { 1624 if (Configuration.needNewResources( 1625 configChanges, cs.getChangingConfigurations())) { 1626 if (DEBUG_CONFIG) { 1627 Log.d(TAG, "FLUSHING #0x" 1628 + Long.toHexString(mDrawableCache.keyAt(i)) 1629 + " / " + cs + " with changes: 0x" 1630 + Integer.toHexString(cs.getChangingConfigurations())); 1631 } 1632 cache.setValueAt(i, null); 1633 } else if (DEBUG_CONFIG) { 1634 Log.d(TAG, "(Keeping #0x" 1635 + Long.toHexString(cache.keyAt(i)) 1636 + " / " + cs + " with changes: 0x" 1637 + Integer.toHexString(cs.getChangingConfigurations()) 1638 + ")"); 1639 } 1640 } 1641 } 1642 } 1643 } 1644 1645 /** 1646 * Update the system resources configuration if they have previously 1647 * been initialized. 1648 * 1649 * @hide 1650 */ 1651 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics, 1652 CompatibilityInfo compat) { 1653 if (mSystem != null) { 1654 mSystem.updateConfiguration(config, metrics, compat); 1655 //Log.i(TAG, "Updated system resources " + mSystem 1656 // + ": " + mSystem.getConfiguration()); 1657 } 1658 } 1659 1660 /** 1661 * @hide 1662 */ 1663 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics) { 1664 updateSystemConfiguration(config, metrics, null); 1665 } 1666 1667 /** 1668 * Return the current display metrics that are in effect for this resource 1669 * object. The returned object should be treated as read-only. 1670 * 1671 * @return The resource's current display metrics. 1672 */ 1673 public DisplayMetrics getDisplayMetrics() { 1674 if (DEBUG_CONFIG) Slog.v(TAG, "Returning DisplayMetrics: " + mMetrics.widthPixels 1675 + "x" + mMetrics.heightPixels + " " + mMetrics.density); 1676 return mMetrics; 1677 } 1678 1679 /** 1680 * Return the current configuration that is in effect for this resource 1681 * object. The returned object should be treated as read-only. 1682 * 1683 * @return The resource's current configuration. 1684 */ 1685 public Configuration getConfiguration() { 1686 return mConfiguration; 1687 } 1688 1689 /** 1690 * Return the compatibility mode information for the application. 1691 * The returned object should be treated as read-only. 1692 * 1693 * @return compatibility info. 1694 * @hide 1695 */ 1696 public CompatibilityInfo getCompatibilityInfo() { 1697 return mCompatibilityInfo != null ? mCompatibilityInfo 1698 : CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 1699 } 1700 1701 /** 1702 * This is just for testing. 1703 * @hide 1704 */ 1705 public void setCompatibilityInfo(CompatibilityInfo ci) { 1706 mCompatibilityInfo = ci; 1707 updateConfiguration(mConfiguration, mMetrics); 1708 } 1709 1710 /** 1711 * Return a resource identifier for the given resource name. A fully 1712 * qualified resource name is of the form "package:type/entry". The first 1713 * two components (package and type) are optional if defType and 1714 * defPackage, respectively, are specified here. 1715 * 1716 * <p>Note: use of this function is discouraged. It is much more 1717 * efficient to retrieve resources by identifier than by name. 1718 * 1719 * @param name The name of the desired resource. 1720 * @param defType Optional default resource type to find, if "type/" is 1721 * not included in the name. Can be null to require an 1722 * explicit type. 1723 * @param defPackage Optional default package to find, if "package:" is 1724 * not included in the name. Can be null to require an 1725 * explicit package. 1726 * 1727 * @return int The associated resource identifier. Returns 0 if no such 1728 * resource was found. (0 is not a valid resource ID.) 1729 */ 1730 public int getIdentifier(String name, String defType, String defPackage) { 1731 if (name == null) { 1732 throw new NullPointerException("name is null"); 1733 } 1734 try { 1735 return Integer.parseInt(name); 1736 } catch (Exception e) { 1737 // Ignore 1738 } 1739 return mAssets.getResourceIdentifier(name, defType, defPackage); 1740 } 1741 1742 /** 1743 * Return true if given resource identifier includes a package. 1744 * 1745 * @hide 1746 */ 1747 public static boolean resourceHasPackage(int resid) { 1748 return (resid >>> 24) != 0; 1749 } 1750 1751 /** 1752 * Return the full name for a given resource identifier. This name is 1753 * a single string of the form "package:type/entry". 1754 * 1755 * @param resid The resource identifier whose name is to be retrieved. 1756 * 1757 * @return A string holding the name of the resource. 1758 * 1759 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1760 * 1761 * @see #getResourcePackageName 1762 * @see #getResourceTypeName 1763 * @see #getResourceEntryName 1764 */ 1765 public String getResourceName(int resid) throws NotFoundException { 1766 String str = mAssets.getResourceName(resid); 1767 if (str != null) return str; 1768 throw new NotFoundException("Unable to find resource ID #0x" 1769 + Integer.toHexString(resid)); 1770 } 1771 1772 /** 1773 * Return the package name for a given resource identifier. 1774 * 1775 * @param resid The resource identifier whose package name is to be 1776 * retrieved. 1777 * 1778 * @return A string holding the package name of the resource. 1779 * 1780 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1781 * 1782 * @see #getResourceName 1783 */ 1784 public String getResourcePackageName(int resid) throws NotFoundException { 1785 String str = mAssets.getResourcePackageName(resid); 1786 if (str != null) return str; 1787 throw new NotFoundException("Unable to find resource ID #0x" 1788 + Integer.toHexString(resid)); 1789 } 1790 1791 /** 1792 * Return the type name for a given resource identifier. 1793 * 1794 * @param resid The resource identifier whose type name is to be 1795 * retrieved. 1796 * 1797 * @return A string holding the type name of the resource. 1798 * 1799 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1800 * 1801 * @see #getResourceName 1802 */ 1803 public String getResourceTypeName(int resid) throws NotFoundException { 1804 String str = mAssets.getResourceTypeName(resid); 1805 if (str != null) return str; 1806 throw new NotFoundException("Unable to find resource ID #0x" 1807 + Integer.toHexString(resid)); 1808 } 1809 1810 /** 1811 * Return the entry name for a given resource identifier. 1812 * 1813 * @param resid The resource identifier whose entry name is to be 1814 * retrieved. 1815 * 1816 * @return A string holding the entry name of the resource. 1817 * 1818 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1819 * 1820 * @see #getResourceName 1821 */ 1822 public String getResourceEntryName(int resid) throws NotFoundException { 1823 String str = mAssets.getResourceEntryName(resid); 1824 if (str != null) return str; 1825 throw new NotFoundException("Unable to find resource ID #0x" 1826 + Integer.toHexString(resid)); 1827 } 1828 1829 /** 1830 * Parse a series of {@link android.R.styleable#Extra <extra>} tags from 1831 * an XML file. You call this when you are at the parent tag of the 1832 * extra tags, and it will return once all of the child tags have been parsed. 1833 * This will call {@link #parseBundleExtra} for each extra tag encountered. 1834 * 1835 * @param parser The parser from which to retrieve the extras. 1836 * @param outBundle A Bundle in which to place all parsed extras. 1837 * @throws XmlPullParserException 1838 * @throws IOException 1839 */ 1840 public void parseBundleExtras(XmlResourceParser parser, Bundle outBundle) 1841 throws XmlPullParserException, IOException { 1842 int outerDepth = parser.getDepth(); 1843 int type; 1844 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 1845 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1846 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1847 continue; 1848 } 1849 1850 String nodeName = parser.getName(); 1851 if (nodeName.equals("extra")) { 1852 parseBundleExtra("extra", parser, outBundle); 1853 XmlUtils.skipCurrentTag(parser); 1854 1855 } else { 1856 XmlUtils.skipCurrentTag(parser); 1857 } 1858 } 1859 } 1860 1861 /** 1862 * Parse a name/value pair out of an XML tag holding that data. The 1863 * AttributeSet must be holding the data defined by 1864 * {@link android.R.styleable#Extra}. The following value types are supported: 1865 * <ul> 1866 * <li> {@link TypedValue#TYPE_STRING}: 1867 * {@link Bundle#putCharSequence Bundle.putCharSequence()} 1868 * <li> {@link TypedValue#TYPE_INT_BOOLEAN}: 1869 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1870 * <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}: 1871 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1872 * <li> {@link TypedValue#TYPE_FLOAT}: 1873 * {@link Bundle#putCharSequence Bundle.putFloat()} 1874 * </ul> 1875 * 1876 * @param tagName The name of the tag these attributes come from; this is 1877 * only used for reporting error messages. 1878 * @param attrs The attributes from which to retrieve the name/value pair. 1879 * @param outBundle The Bundle in which to place the parsed value. 1880 * @throws XmlPullParserException If the attributes are not valid. 1881 */ 1882 public void parseBundleExtra(String tagName, AttributeSet attrs, 1883 Bundle outBundle) throws XmlPullParserException { 1884 TypedArray sa = obtainAttributes(attrs, 1885 com.android.internal.R.styleable.Extra); 1886 1887 String name = sa.getString( 1888 com.android.internal.R.styleable.Extra_name); 1889 if (name == null) { 1890 sa.recycle(); 1891 throw new XmlPullParserException("<" + tagName 1892 + "> requires an android:name attribute at " 1893 + attrs.getPositionDescription()); 1894 } 1895 1896 TypedValue v = sa.peekValue( 1897 com.android.internal.R.styleable.Extra_value); 1898 if (v != null) { 1899 if (v.type == TypedValue.TYPE_STRING) { 1900 CharSequence cs = v.coerceToString(); 1901 outBundle.putCharSequence(name, cs); 1902 } else if (v.type == TypedValue.TYPE_INT_BOOLEAN) { 1903 outBundle.putBoolean(name, v.data != 0); 1904 } else if (v.type >= TypedValue.TYPE_FIRST_INT 1905 && v.type <= TypedValue.TYPE_LAST_INT) { 1906 outBundle.putInt(name, v.data); 1907 } else if (v.type == TypedValue.TYPE_FLOAT) { 1908 outBundle.putFloat(name, v.getFloat()); 1909 } else { 1910 sa.recycle(); 1911 throw new XmlPullParserException("<" + tagName 1912 + "> only supports string, integer, float, color, and boolean at " 1913 + attrs.getPositionDescription()); 1914 } 1915 } else { 1916 sa.recycle(); 1917 throw new XmlPullParserException("<" + tagName 1918 + "> requires an android:value or android:resource attribute at " 1919 + attrs.getPositionDescription()); 1920 } 1921 1922 sa.recycle(); 1923 } 1924 1925 /** 1926 * Retrieve underlying AssetManager storage for these resources. 1927 */ 1928 public final AssetManager getAssets() { 1929 return mAssets; 1930 } 1931 1932 /** 1933 * Call this to remove all cached loaded layout resources from the 1934 * Resources object. Only intended for use with performance testing 1935 * tools. 1936 */ 1937 public final void flushLayoutCache() { 1938 synchronized (mCachedXmlBlockIds) { 1939 // First see if this block is in our cache. 1940 final int num = mCachedXmlBlockIds.length; 1941 for (int i=0; i<num; i++) { 1942 mCachedXmlBlockIds[i] = -0; 1943 XmlBlock oldBlock = mCachedXmlBlocks[i]; 1944 if (oldBlock != null) { 1945 oldBlock.close(); 1946 } 1947 mCachedXmlBlocks[i] = null; 1948 } 1949 } 1950 } 1951 1952 /** 1953 * Start preloading of resource data using this Resources object. Only 1954 * for use by the zygote process for loading common system resources. 1955 * {@hide} 1956 */ 1957 public final void startPreloading() { 1958 synchronized (sSync) { 1959 if (sPreloaded) { 1960 throw new IllegalStateException("Resources already preloaded"); 1961 } 1962 sPreloaded = true; 1963 mPreloading = true; 1964 sPreloadedDensity = DisplayMetrics.DENSITY_DEVICE; 1965 mConfiguration.densityDpi = sPreloadedDensity; 1966 updateConfiguration(null, null); 1967 } 1968 } 1969 1970 /** 1971 * Called by zygote when it is done preloading resources, to change back 1972 * to normal Resources operation. 1973 */ 1974 public final void finishPreloading() { 1975 if (mPreloading) { 1976 mPreloading = false; 1977 flushLayoutCache(); 1978 } 1979 } 1980 1981 static private final int VARYING_CONFIGS = ActivityInfo.activityInfoConfigToNative( 1982 ActivityInfo.CONFIG_LAYOUT_DIRECTION); 1983 1984 private boolean verifyPreloadConfig(int changingConfigurations, int resourceId, String name) { 1985 if (((changingConfigurations&~(ActivityInfo.CONFIG_FONT_SCALE | 1986 ActivityInfo.CONFIG_DENSITY)) & VARYING_CONFIGS) != 0) { 1987 String resName; 1988 try { 1989 resName = getResourceName(resourceId); 1990 } catch (NotFoundException e) { 1991 resName = "?"; 1992 } 1993 Log.w(TAG, "Preloaded " + name + " resource #0x" 1994 + Integer.toHexString(resourceId) 1995 + " (" + resName + ") that varies with configuration!!"); 1996 return false; 1997 } 1998 return true; 1999 } 2000 2001 /*package*/ Drawable loadDrawable(TypedValue value, int id) 2002 throws NotFoundException { 2003 2004 if (TRACE_FOR_PRELOAD) { 2005 // Log only framework resources 2006 if ((id >>> 24) == 0x1) { 2007 final String name = getResourceName(id); 2008 if (name != null) android.util.Log.d("PreloadDrawable", name); 2009 } 2010 } 2011 2012 boolean isColorDrawable = false; 2013 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2014 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2015 isColorDrawable = true; 2016 } 2017 final long key = isColorDrawable ? value.data : 2018 (((long) value.assetCookie) << 32) | value.data; 2019 2020 Drawable dr = getCachedDrawable(isColorDrawable ? mColorDrawableCache : mDrawableCache, key); 2021 2022 if (dr != null) { 2023 return dr; 2024 } 2025 2026 Drawable.ConstantState cs = isColorDrawable 2027 ? sPreloadedColorDrawables.get(key) 2028 : (sPreloadedDensity == mConfiguration.densityDpi 2029 ? sPreloadedDrawables.get(key) : null); 2030 if (cs != null) { 2031 dr = cs.newDrawable(this); 2032 } else { 2033 if (isColorDrawable) { 2034 dr = new ColorDrawable(value.data); 2035 } 2036 2037 if (dr == null) { 2038 if (value.string == null) { 2039 throw new NotFoundException( 2040 "Resource is not a Drawable (color or path): " + value); 2041 } 2042 2043 String file = value.string.toString(); 2044 2045 if (TRACE_FOR_MISS_PRELOAD) { 2046 // Log only framework resources 2047 if ((id >>> 24) == 0x1) { 2048 final String name = getResourceName(id); 2049 if (name != null) android.util.Log.d(TAG, "Loading framework drawable #" 2050 + Integer.toHexString(id) + ": " + name 2051 + " at " + file); 2052 } 2053 } 2054 2055 if (DEBUG_LOAD) Log.v(TAG, "Loading drawable for cookie " 2056 + value.assetCookie + ": " + file); 2057 2058 if (file.endsWith(".xml")) { 2059 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2060 try { 2061 XmlResourceParser rp = loadXmlResourceParser( 2062 file, id, value.assetCookie, "drawable"); 2063 dr = Drawable.createFromXml(this, rp); 2064 rp.close(); 2065 } catch (Exception e) { 2066 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2067 NotFoundException rnf = new NotFoundException( 2068 "File " + file + " from drawable resource ID #0x" 2069 + Integer.toHexString(id)); 2070 rnf.initCause(e); 2071 throw rnf; 2072 } 2073 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2074 2075 } else { 2076 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2077 try { 2078 InputStream is = mAssets.openNonAsset( 2079 value.assetCookie, file, AssetManager.ACCESS_STREAMING); 2080 // System.out.println("Opened file " + file + ": " + is); 2081 dr = Drawable.createFromResourceStream(this, value, is, 2082 file, null); 2083 is.close(); 2084 // System.out.println("Created stream: " + dr); 2085 } catch (Exception e) { 2086 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2087 NotFoundException rnf = new NotFoundException( 2088 "File " + file + " from drawable resource ID #0x" 2089 + Integer.toHexString(id)); 2090 rnf.initCause(e); 2091 throw rnf; 2092 } 2093 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2094 } 2095 } 2096 } 2097 2098 if (dr != null) { 2099 dr.setChangingConfigurations(value.changingConfigurations); 2100 cs = dr.getConstantState(); 2101 if (cs != null) { 2102 if (mPreloading) { 2103 if (verifyPreloadConfig(cs.getChangingConfigurations(), value.resourceId, "drawable")) { 2104 if (isColorDrawable) { 2105 sPreloadedColorDrawables.put(key, cs); 2106 } else { 2107 sPreloadedDrawables.put(key, cs); 2108 } 2109 } 2110 } else { 2111 synchronized (mAccessLock) { 2112 //Log.i(TAG, "Saving cached drawable @ #" + 2113 // Integer.toHexString(key.intValue()) 2114 // + " in " + this + ": " + cs); 2115 if (isColorDrawable) { 2116 mColorDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 2117 } else { 2118 mDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 2119 } 2120 } 2121 } 2122 } 2123 } 2124 2125 return dr; 2126 } 2127 2128 private Drawable getCachedDrawable( 2129 LongSparseArray<WeakReference<ConstantState>> drawableCache, 2130 long key) { 2131 synchronized (mAccessLock) { 2132 WeakReference<Drawable.ConstantState> wr = drawableCache.get(key); 2133 if (wr != null) { // we have the key 2134 Drawable.ConstantState entry = wr.get(); 2135 if (entry != null) { 2136 //Log.i(TAG, "Returning cached drawable @ #" + 2137 // Integer.toHexString(((Integer)key).intValue()) 2138 // + " in " + this + ": " + entry); 2139 return entry.newDrawable(this); 2140 } 2141 else { // our entry has been purged 2142 drawableCache.delete(key); 2143 } 2144 } 2145 } 2146 return null; 2147 } 2148 2149 /*package*/ ColorStateList loadColorStateList(TypedValue value, int id) 2150 throws NotFoundException { 2151 if (TRACE_FOR_PRELOAD) { 2152 // Log only framework resources 2153 if ((id >>> 24) == 0x1) { 2154 final String name = getResourceName(id); 2155 if (name != null) android.util.Log.d("PreloadColorStateList", name); 2156 } 2157 } 2158 2159 final long key = (((long) value.assetCookie) << 32) | value.data; 2160 2161 ColorStateList csl; 2162 2163 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 2164 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 2165 2166 csl = sPreloadedColorStateLists.get(key); 2167 if (csl != null) { 2168 return csl; 2169 } 2170 2171 csl = ColorStateList.valueOf(value.data); 2172 if (mPreloading) { 2173 if (verifyPreloadConfig(value.changingConfigurations, value.resourceId, "color")) { 2174 sPreloadedColorStateLists.put(key, csl); 2175 } 2176 } 2177 2178 return csl; 2179 } 2180 2181 csl = getCachedColorStateList(key); 2182 if (csl != null) { 2183 return csl; 2184 } 2185 2186 csl = sPreloadedColorStateLists.get(key); 2187 if (csl != null) { 2188 return csl; 2189 } 2190 2191 if (value.string == null) { 2192 throw new NotFoundException( 2193 "Resource is not a ColorStateList (color or path): " + value); 2194 } 2195 2196 String file = value.string.toString(); 2197 2198 if (file.endsWith(".xml")) { 2199 Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file); 2200 try { 2201 XmlResourceParser rp = loadXmlResourceParser( 2202 file, id, value.assetCookie, "colorstatelist"); 2203 csl = ColorStateList.createFromXml(this, rp); 2204 rp.close(); 2205 } catch (Exception e) { 2206 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2207 NotFoundException rnf = new NotFoundException( 2208 "File " + file + " from color state list resource ID #0x" 2209 + Integer.toHexString(id)); 2210 rnf.initCause(e); 2211 throw rnf; 2212 } 2213 Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); 2214 } else { 2215 throw new NotFoundException( 2216 "File " + file + " from drawable resource ID #0x" 2217 + Integer.toHexString(id) + ": .xml extension required"); 2218 } 2219 2220 if (csl != null) { 2221 if (mPreloading) { 2222 if (verifyPreloadConfig(value.changingConfigurations, value.resourceId, "color")) { 2223 sPreloadedColorStateLists.put(key, csl); 2224 } 2225 } else { 2226 synchronized (mAccessLock) { 2227 //Log.i(TAG, "Saving cached color state list @ #" + 2228 // Integer.toHexString(key.intValue()) 2229 // + " in " + this + ": " + csl); 2230 mColorStateListCache.put(key, new WeakReference<ColorStateList>(csl)); 2231 } 2232 } 2233 } 2234 2235 return csl; 2236 } 2237 2238 private ColorStateList getCachedColorStateList(long key) { 2239 synchronized (mAccessLock) { 2240 WeakReference<ColorStateList> wr = mColorStateListCache.get(key); 2241 if (wr != null) { // we have the key 2242 ColorStateList entry = wr.get(); 2243 if (entry != null) { 2244 //Log.i(TAG, "Returning cached color state list @ #" + 2245 // Integer.toHexString(((Integer)key).intValue()) 2246 // + " in " + this + ": " + entry); 2247 return entry; 2248 } else { // our entry has been purged 2249 mColorStateListCache.delete(key); 2250 } 2251 } 2252 } 2253 return null; 2254 } 2255 2256 /*package*/ XmlResourceParser loadXmlResourceParser(int id, String type) 2257 throws NotFoundException { 2258 synchronized (mAccessLock) { 2259 TypedValue value = mTmpValue; 2260 if (value == null) { 2261 mTmpValue = value = new TypedValue(); 2262 } 2263 getValue(id, value, true); 2264 if (value.type == TypedValue.TYPE_STRING) { 2265 return loadXmlResourceParser(value.string.toString(), id, 2266 value.assetCookie, type); 2267 } 2268 throw new NotFoundException( 2269 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 2270 + Integer.toHexString(value.type) + " is not valid"); 2271 } 2272 } 2273 2274 /*package*/ XmlResourceParser loadXmlResourceParser(String file, int id, 2275 int assetCookie, String type) throws NotFoundException { 2276 if (id != 0) { 2277 try { 2278 // These may be compiled... 2279 synchronized (mCachedXmlBlockIds) { 2280 // First see if this block is in our cache. 2281 final int num = mCachedXmlBlockIds.length; 2282 for (int i=0; i<num; i++) { 2283 if (mCachedXmlBlockIds[i] == id) { 2284 //System.out.println("**** REUSING XML BLOCK! id=" 2285 // + id + ", index=" + i); 2286 return mCachedXmlBlocks[i].newParser(); 2287 } 2288 } 2289 2290 // Not in the cache, create a new block and put it at 2291 // the next slot in the cache. 2292 XmlBlock block = mAssets.openXmlBlockAsset( 2293 assetCookie, file); 2294 if (block != null) { 2295 int pos = mLastCachedXmlBlockIndex+1; 2296 if (pos >= num) pos = 0; 2297 mLastCachedXmlBlockIndex = pos; 2298 XmlBlock oldBlock = mCachedXmlBlocks[pos]; 2299 if (oldBlock != null) { 2300 oldBlock.close(); 2301 } 2302 mCachedXmlBlockIds[pos] = id; 2303 mCachedXmlBlocks[pos] = block; 2304 //System.out.println("**** CACHING NEW XML BLOCK! id=" 2305 // + id + ", index=" + pos); 2306 return block.newParser(); 2307 } 2308 } 2309 } catch (Exception e) { 2310 NotFoundException rnf = new NotFoundException( 2311 "File " + file + " from xml type " + type + " resource ID #0x" 2312 + Integer.toHexString(id)); 2313 rnf.initCause(e); 2314 throw rnf; 2315 } 2316 } 2317 2318 throw new NotFoundException( 2319 "File " + file + " from xml type " + type + " resource ID #0x" 2320 + Integer.toHexString(id)); 2321 } 2322 2323 private TypedArray getCachedStyledAttributes(int len) { 2324 synchronized (mAccessLock) { 2325 TypedArray attrs = mCachedStyledAttributes; 2326 if (attrs != null) { 2327 mCachedStyledAttributes = null; 2328 if (DEBUG_ATTRIBUTES_CACHE) { 2329 mLastRetrievedAttrs = new RuntimeException("here"); 2330 mLastRetrievedAttrs.fillInStackTrace(); 2331 } 2332 2333 attrs.mLength = len; 2334 int fullLen = len * AssetManager.STYLE_NUM_ENTRIES; 2335 if (attrs.mData.length >= fullLen) { 2336 return attrs; 2337 } 2338 attrs.mData = new int[fullLen]; 2339 attrs.mIndices = new int[1+len]; 2340 return attrs; 2341 } 2342 if (DEBUG_ATTRIBUTES_CACHE) { 2343 RuntimeException here = new RuntimeException("here"); 2344 here.fillInStackTrace(); 2345 if (mLastRetrievedAttrs != null) { 2346 Log.i(TAG, "Allocated new TypedArray of " + len + " in " + this, here); 2347 Log.i(TAG, "Last retrieved attributes here", mLastRetrievedAttrs); 2348 } 2349 mLastRetrievedAttrs = here; 2350 } 2351 return new TypedArray(this, 2352 new int[len*AssetManager.STYLE_NUM_ENTRIES], 2353 new int[1+len], len); 2354 } 2355 } 2356 2357 private Resources() { 2358 mAssets = AssetManager.getSystem(); 2359 // NOTE: Intentionally leaving this uninitialized (all values set 2360 // to zero), so that anyone who tries to do something that requires 2361 // metrics will get a very wrong value. 2362 mConfiguration.setToDefaults(); 2363 mMetrics.setToDefaults(); 2364 updateConfiguration(null, null); 2365 mAssets.ensureStringBlocks(); 2366 mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 2367 } 2368} 2369