Resources.java revision 179a3bda60044cf191ce9f47e3349398fc32bafb
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.graphics.Movie; 25import android.graphics.drawable.Drawable; 26import android.graphics.drawable.ColorDrawable; 27import android.graphics.drawable.Drawable.ConstantState; 28import android.os.Build; 29import android.os.Bundle; 30import android.os.SystemProperties; 31import android.util.AttributeSet; 32import android.util.DisplayMetrics; 33import android.util.Log; 34import android.util.SparseArray; 35import android.util.TypedValue; 36import android.util.LongSparseArray; 37import android.view.Display; 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 TRACE_FOR_PRELOAD = false; 76 77 private static final int ID_OTHER = 0x01000004; 78 79 private static final Object mSync = new Object(); 80 private static Resources mSystem = null; 81 82 // Information about preloaded resources. Note that they are not 83 // protected by a lock, because while preloading in zygote we are all 84 // single-threaded, and after that these are immutable. 85 private static final LongSparseArray<Drawable.ConstantState> sPreloadedDrawables 86 = new LongSparseArray<Drawable.ConstantState>(); 87 private static final SparseArray<ColorStateList> mPreloadedColorStateLists 88 = new SparseArray<ColorStateList>(); 89 private static final LongSparseArray<Drawable.ConstantState> sPreloadedColorDrawables 90 = new LongSparseArray<Drawable.ConstantState>(); 91 private static boolean mPreloaded; 92 93 /*package*/ final TypedValue mTmpValue = new TypedValue(); 94 95 // These are protected by the mTmpValue lock. 96 private final LongSparseArray<WeakReference<Drawable.ConstantState> > mDrawableCache 97 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(); 98 private final SparseArray<WeakReference<ColorStateList> > mColorStateListCache 99 = new SparseArray<WeakReference<ColorStateList> >(); 100 private final LongSparseArray<WeakReference<Drawable.ConstantState> > mColorDrawableCache 101 = new LongSparseArray<WeakReference<Drawable.ConstantState> >(); 102 private boolean mPreloading; 103 104 /*package*/ TypedArray mCachedStyledAttributes = null; 105 106 private int mLastCachedXmlBlockIndex = -1; 107 private final int[] mCachedXmlBlockIds = { 0, 0, 0, 0 }; 108 private final XmlBlock[] mCachedXmlBlocks = new XmlBlock[4]; 109 110 /*package*/ final AssetManager mAssets; 111 private final Configuration mConfiguration = new Configuration(); 112 /*package*/ final DisplayMetrics mMetrics = new DisplayMetrics(); 113 private NativePluralRules mPluralRule; 114 115 private CompatibilityInfo mCompatibilityInfo; 116 private Display mDefaultDisplay; 117 118 private static final LongSparseArray<Object> EMPTY_ARRAY = new LongSparseArray<Object>(0) { 119 @Override 120 public void put(long k, Object o) { 121 throw new UnsupportedOperationException(); 122 } 123 @Override 124 public void append(long k, Object o) { 125 throw new UnsupportedOperationException(); 126 } 127 }; 128 129 @SuppressWarnings("unchecked") 130 private static <T> LongSparseArray<T> emptySparseArray() { 131 return (LongSparseArray<T>) EMPTY_ARRAY; 132 } 133 134 /** @hide */ 135 public static int selectDefaultTheme(int curTheme, int targetSdkVersion) { 136 return selectSystemTheme(curTheme, targetSdkVersion, 137 com.android.internal.R.style.Theme, com.android.internal.R.style.Theme_Holo); 138 } 139 140 /** @hide */ 141 public static int selectSystemTheme(int curTheme, int targetSdkVersion, int orig, int holo) { 142 if (curTheme != 0) { 143 return curTheme; 144 } 145 if (targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) { 146 return orig; 147 } 148 return holo; 149 } 150 151 /** 152 * This exception is thrown by the resource APIs when a requested resource 153 * can not be found. 154 */ 155 public static class NotFoundException extends RuntimeException { 156 public NotFoundException() { 157 } 158 159 public NotFoundException(String name) { 160 super(name); 161 } 162 } 163 164 /** 165 * Create a new Resources object on top of an existing set of assets in an 166 * AssetManager. 167 * 168 * @param assets Previously created AssetManager. 169 * @param metrics Current display metrics to consider when 170 * selecting/computing resource values. 171 * @param config Desired device configuration to consider when 172 * selecting/computing resource values (optional). 173 */ 174 public Resources(AssetManager assets, DisplayMetrics metrics, 175 Configuration config) { 176 this(assets, metrics, config, (CompatibilityInfo) null); 177 } 178 179 /** 180 * Creates a new Resources object with CompatibilityInfo. 181 * 182 * @param assets Previously created AssetManager. 183 * @param metrics Current display metrics to consider when 184 * selecting/computing resource values. 185 * @param config Desired device configuration to consider when 186 * selecting/computing resource values (optional). 187 * @param compInfo this resource's compatibility info. It will use the default compatibility 188 * info when it's null. 189 * @hide 190 */ 191 public Resources(AssetManager assets, DisplayMetrics metrics, 192 Configuration config, CompatibilityInfo compInfo) { 193 mAssets = assets; 194 mMetrics.setToDefaults(); 195 if (compInfo == null) { 196 mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 197 } else { 198 mCompatibilityInfo = compInfo; 199 } 200 updateConfiguration(config, metrics); 201 assets.ensureStringBlocks(); 202 } 203 204 /** 205 * Return a global shared Resources object that provides access to only 206 * system resources (no application resources), and is not configured for 207 * the current screen (can not use dimension units, does not change based 208 * on orientation, etc). 209 */ 210 public static Resources getSystem() { 211 synchronized (mSync) { 212 Resources ret = mSystem; 213 if (ret == null) { 214 ret = new Resources(); 215 mSystem = ret; 216 } 217 218 return ret; 219 } 220 } 221 222 /** 223 * Return the string value associated with a particular resource ID. The 224 * returned object will be a String if this is a plain string; it will be 225 * some other type of CharSequence if it is styled. 226 * {@more} 227 * 228 * @param id The desired resource identifier, as generated by the aapt 229 * tool. This integer encodes the package, type, and resource 230 * entry. The value 0 is an invalid identifier. 231 * 232 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 233 * 234 * @return CharSequence The string data associated with the resource, plus 235 * possibly styled text information. 236 */ 237 public CharSequence getText(int id) throws NotFoundException { 238 CharSequence res = mAssets.getResourceText(id); 239 if (res != null) { 240 return res; 241 } 242 throw new NotFoundException("String resource ID #0x" 243 + Integer.toHexString(id)); 244 } 245 246 /** 247 * Return the character sequence associated with a particular resource ID for a particular 248 * numerical quantity. 249 * 250 * <p>See <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String 251 * Resources</a> for more on quantity strings. 252 * 253 * @param id The desired resource identifier, as generated by the aapt 254 * tool. This integer encodes the package, type, and resource 255 * entry. The value 0 is an invalid identifier. 256 * @param quantity The number used to get the correct string for the current language's 257 * plural rules. 258 * 259 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 260 * 261 * @return CharSequence The string data associated with the resource, plus 262 * possibly styled text information. 263 */ 264 public CharSequence getQuantityText(int id, int quantity) throws NotFoundException { 265 NativePluralRules rule = getPluralRule(); 266 CharSequence res = mAssets.getResourceBagText(id, 267 attrForQuantityCode(rule.quantityForInt(quantity))); 268 if (res != null) { 269 return res; 270 } 271 res = mAssets.getResourceBagText(id, ID_OTHER); 272 if (res != null) { 273 return res; 274 } 275 throw new NotFoundException("Plural resource ID #0x" + Integer.toHexString(id) 276 + " quantity=" + quantity 277 + " item=" + stringForQuantityCode(rule.quantityForInt(quantity))); 278 } 279 280 private NativePluralRules getPluralRule() { 281 synchronized (mSync) { 282 if (mPluralRule == null) { 283 mPluralRule = NativePluralRules.forLocale(mConfiguration.locale); 284 } 285 return mPluralRule; 286 } 287 } 288 289 private static int attrForQuantityCode(int quantityCode) { 290 switch (quantityCode) { 291 case NativePluralRules.ZERO: return 0x01000005; 292 case NativePluralRules.ONE: return 0x01000006; 293 case NativePluralRules.TWO: return 0x01000007; 294 case NativePluralRules.FEW: return 0x01000008; 295 case NativePluralRules.MANY: return 0x01000009; 296 default: return ID_OTHER; 297 } 298 } 299 300 private static String stringForQuantityCode(int quantityCode) { 301 switch (quantityCode) { 302 case NativePluralRules.ZERO: return "zero"; 303 case NativePluralRules.ONE: return "one"; 304 case NativePluralRules.TWO: return "two"; 305 case NativePluralRules.FEW: return "few"; 306 case NativePluralRules.MANY: return "many"; 307 default: return "other"; 308 } 309 } 310 311 /** 312 * Return the string value associated with a particular resource ID. It 313 * will be stripped of any styled text information. 314 * {@more} 315 * 316 * @param id The desired resource identifier, as generated by the aapt 317 * tool. This integer encodes the package, type, and resource 318 * entry. The value 0 is an invalid identifier. 319 * 320 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 321 * 322 * @return String The string data associated with the resource, 323 * stripped of styled text information. 324 */ 325 public String getString(int id) throws NotFoundException { 326 CharSequence res = getText(id); 327 if (res != null) { 328 return res.toString(); 329 } 330 throw new NotFoundException("String resource ID #0x" 331 + Integer.toHexString(id)); 332 } 333 334 335 /** 336 * Return the string value associated with a particular resource ID, 337 * substituting the format arguments as defined in {@link java.util.Formatter} 338 * and {@link java.lang.String#format}. It will be stripped of any styled text 339 * information. 340 * {@more} 341 * 342 * @param id The desired resource identifier, as generated by the aapt 343 * tool. This integer encodes the package, type, and resource 344 * entry. The value 0 is an invalid identifier. 345 * 346 * @param formatArgs The format arguments that will be used for substitution. 347 * 348 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 349 * 350 * @return String The string data associated with the resource, 351 * stripped of styled text information. 352 */ 353 public String getString(int id, Object... formatArgs) throws NotFoundException { 354 String raw = getString(id); 355 return String.format(mConfiguration.locale, raw, formatArgs); 356 } 357 358 /** 359 * Return the string value associated with a particular resource ID for a particular 360 * numerical quantity, substituting the format arguments as defined in 361 * {@link java.util.Formatter} and {@link java.lang.String#format}. It will be 362 * stripped of any styled text information. 363 * {@more} 364 * 365 * <p>See <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String 366 * Resources</a> for more on quantity strings. 367 * 368 * @param id The desired resource identifier, as generated by the aapt 369 * tool. This integer encodes the package, type, and resource 370 * entry. The value 0 is an invalid identifier. 371 * @param quantity The number used to get the correct string for the current language's 372 * plural rules. 373 * @param formatArgs The format arguments that will be used for substitution. 374 * 375 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 376 * 377 * @return String The string data associated with the resource, 378 * stripped of styled text information. 379 */ 380 public String getQuantityString(int id, int quantity, Object... formatArgs) 381 throws NotFoundException { 382 String raw = getQuantityText(id, quantity).toString(); 383 return String.format(mConfiguration.locale, raw, formatArgs); 384 } 385 386 /** 387 * Return the string value associated with a particular resource ID for a particular 388 * numerical quantity. 389 * 390 * <p>See <a href="{@docRoot}guide/topics/resources/string-resource.html#Plurals">String 391 * Resources</a> for more on quantity strings. 392 * 393 * @param id The desired resource identifier, as generated by the aapt 394 * tool. This integer encodes the package, type, and resource 395 * entry. The value 0 is an invalid identifier. 396 * @param quantity The number used to get the correct string for the current language's 397 * plural rules. 398 * 399 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 400 * 401 * @return String The string data associated with the resource, 402 * stripped of styled text information. 403 */ 404 public String getQuantityString(int id, int quantity) throws NotFoundException { 405 return getQuantityText(id, quantity).toString(); 406 } 407 408 /** 409 * Return the string value associated with a particular resource ID. The 410 * returned object will be a String if this is a plain string; it will be 411 * some other type of CharSequence if it is styled. 412 * 413 * @param id The desired resource identifier, as generated by the aapt 414 * tool. This integer encodes the package, type, and resource 415 * entry. The value 0 is an invalid identifier. 416 * 417 * @param def The default CharSequence to return. 418 * 419 * @return CharSequence The string data associated with the resource, plus 420 * possibly styled text information, or def if id is 0 or not found. 421 */ 422 public CharSequence getText(int id, CharSequence def) { 423 CharSequence res = id != 0 ? mAssets.getResourceText(id) : null; 424 return res != null ? res : def; 425 } 426 427 /** 428 * Return the styled text array associated with a particular resource ID. 429 * 430 * @param id The desired resource identifier, as generated by the aapt 431 * tool. This integer encodes the package, type, and resource 432 * entry. The value 0 is an invalid identifier. 433 * 434 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 435 * 436 * @return The styled text array associated with the resource. 437 */ 438 public CharSequence[] getTextArray(int id) throws NotFoundException { 439 CharSequence[] res = mAssets.getResourceTextArray(id); 440 if (res != null) { 441 return res; 442 } 443 throw new NotFoundException("Text array resource ID #0x" 444 + Integer.toHexString(id)); 445 } 446 447 /** 448 * Return the string array associated with a particular resource ID. 449 * 450 * @param id The desired resource identifier, as generated by the aapt 451 * tool. This integer encodes the package, type, and resource 452 * entry. The value 0 is an invalid identifier. 453 * 454 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 455 * 456 * @return The string array associated with the resource. 457 */ 458 public String[] getStringArray(int id) throws NotFoundException { 459 String[] res = mAssets.getResourceStringArray(id); 460 if (res != null) { 461 return res; 462 } 463 throw new NotFoundException("String array resource ID #0x" 464 + Integer.toHexString(id)); 465 } 466 467 /** 468 * Return the int array associated with a particular resource ID. 469 * 470 * @param id The desired resource identifier, as generated by the aapt 471 * tool. This integer encodes the package, type, and resource 472 * entry. The value 0 is an invalid identifier. 473 * 474 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 475 * 476 * @return The int array associated with the resource. 477 */ 478 public int[] getIntArray(int id) throws NotFoundException { 479 int[] res = mAssets.getArrayIntResource(id); 480 if (res != null) { 481 return res; 482 } 483 throw new NotFoundException("Int array resource ID #0x" 484 + Integer.toHexString(id)); 485 } 486 487 /** 488 * Return an array of heterogeneous values. 489 * 490 * @param id The desired resource identifier, as generated by the aapt 491 * tool. This integer encodes the package, type, and resource 492 * entry. The value 0 is an invalid identifier. 493 * 494 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 495 * 496 * @return Returns a TypedArray holding an array of the array values. 497 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 498 * when done with it. 499 */ 500 public TypedArray obtainTypedArray(int id) throws NotFoundException { 501 int len = mAssets.getArraySize(id); 502 if (len < 0) { 503 throw new NotFoundException("Array resource ID #0x" 504 + Integer.toHexString(id)); 505 } 506 507 TypedArray array = getCachedStyledAttributes(len); 508 array.mLength = mAssets.retrieveArray(id, array.mData); 509 array.mIndices[0] = 0; 510 511 return array; 512 } 513 514 /** 515 * Retrieve a dimensional for a particular resource ID. Unit 516 * conversions are based on the current {@link DisplayMetrics} associated 517 * with the resources. 518 * 519 * @param id The desired resource identifier, as generated by the aapt 520 * tool. This integer encodes the package, type, and resource 521 * entry. The value 0 is an invalid identifier. 522 * 523 * @return Resource dimension value multiplied by the appropriate 524 * metric. 525 * 526 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 527 * 528 * @see #getDimensionPixelOffset 529 * @see #getDimensionPixelSize 530 */ 531 public float getDimension(int id) throws NotFoundException { 532 synchronized (mTmpValue) { 533 TypedValue value = mTmpValue; 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 (mTmpValue) { 565 TypedValue value = mTmpValue; 566 getValue(id, value, true); 567 if (value.type == TypedValue.TYPE_DIMENSION) { 568 return TypedValue.complexToDimensionPixelOffset( 569 value.data, mMetrics); 570 } 571 throw new NotFoundException( 572 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 573 + Integer.toHexString(value.type) + " is not valid"); 574 } 575 } 576 577 /** 578 * Retrieve a dimensional for a particular resource ID for use 579 * as a size in raw pixels. This is the same as 580 * {@link #getDimension}, except the returned value is converted to 581 * integer pixels for use as a size. A size conversion involves 582 * rounding the base value, and ensuring that a non-zero base value 583 * is at least one pixel in size. 584 * 585 * @param id The desired resource identifier, as generated by the aapt 586 * tool. This integer encodes the package, type, and resource 587 * entry. The value 0 is an invalid identifier. 588 * 589 * @return Resource dimension value multiplied by the appropriate 590 * metric and truncated to integer pixels. 591 * 592 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 593 * 594 * @see #getDimension 595 * @see #getDimensionPixelOffset 596 */ 597 public int getDimensionPixelSize(int id) throws NotFoundException { 598 synchronized (mTmpValue) { 599 TypedValue value = mTmpValue; 600 getValue(id, value, true); 601 if (value.type == TypedValue.TYPE_DIMENSION) { 602 return TypedValue.complexToDimensionPixelSize( 603 value.data, mMetrics); 604 } 605 throw new NotFoundException( 606 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 607 + Integer.toHexString(value.type) + " is not valid"); 608 } 609 } 610 611 /** 612 * Retrieve a fractional unit for a particular resource ID. 613 * 614 * @param id The desired resource identifier, as generated by the aapt 615 * tool. This integer encodes the package, type, and resource 616 * entry. The value 0 is an invalid identifier. 617 * @param base The base value of this fraction. In other words, a 618 * standard fraction is multiplied by this value. 619 * @param pbase The parent base value of this fraction. In other 620 * words, a parent fraction (nn%p) is multiplied by this 621 * value. 622 * 623 * @return Attribute fractional value multiplied by the appropriate 624 * base value. 625 * 626 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 627 */ 628 public float getFraction(int id, int base, int pbase) { 629 synchronized (mTmpValue) { 630 TypedValue value = mTmpValue; 631 getValue(id, value, true); 632 if (value.type == TypedValue.TYPE_FRACTION) { 633 return TypedValue.complexToFraction(value.data, base, pbase); 634 } 635 throw new NotFoundException( 636 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 637 + Integer.toHexString(value.type) + " is not valid"); 638 } 639 } 640 641 /** 642 * Return a drawable object associated with a particular resource ID. 643 * Various types of objects will be returned depending on the underlying 644 * resource -- for example, a solid color, PNG image, scalable image, etc. 645 * The Drawable API hides these implementation details. 646 * 647 * @param id The desired resource identifier, as generated by the aapt 648 * tool. This integer encodes the package, type, and resource 649 * entry. The value 0 is an invalid identifier. 650 * 651 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 652 * 653 * @return Drawable An object that can be used to draw this resource. 654 */ 655 public Drawable getDrawable(int id) throws NotFoundException { 656 synchronized (mTmpValue) { 657 TypedValue value = mTmpValue; 658 getValue(id, value, true); 659 return loadDrawable(value, id); 660 } 661 } 662 663 /** 664 * Return a drawable object associated with a particular resource ID for the 665 * given screen density in DPI. This will set the drawable's density to be 666 * the device's density multiplied by the ratio of actual drawable density 667 * to requested density. This allows the drawable to be scaled up to the 668 * correct size if needed. Various types of objects will be returned 669 * depending on the underlying resource -- for example, a solid color, PNG 670 * image, scalable image, etc. The Drawable API hides these implementation 671 * details. 672 * 673 * @param id The desired resource identifier, as generated by the aapt tool. 674 * This integer encodes the package, type, and resource entry. 675 * The value 0 is an invalid identifier. 676 * @param density the desired screen density indicated by the resource as 677 * found in {@link DisplayMetrics}. 678 * @throws NotFoundException Throws NotFoundException if the given ID does 679 * not exist. 680 * @return Drawable An object that can be used to draw this resource. 681 * @hide 682 */ 683 public Drawable getDrawableForDensity(int id, int density) throws NotFoundException { 684 synchronized (mTmpValue) { 685 TypedValue value = mTmpValue; 686 getValueForDensity(id, density, value, true); 687 688 /* 689 * Pretend the requested density is actually the display density. If 690 * the drawable returned is not the requested density, then force it 691 * to be scaled later by dividing its density by the ratio of 692 * requested density to actual device density. Drawables that have 693 * undefined density or no density don't need to be handled here. 694 */ 695 if (value.density > 0 && value.density != TypedValue.DENSITY_NONE) { 696 if (value.density == density) { 697 value.density = DisplayMetrics.DENSITY_DEVICE; 698 } else { 699 value.density = (value.density * DisplayMetrics.DENSITY_DEVICE) / density; 700 } 701 } 702 703 return loadDrawable(value, id); 704 } 705 } 706 707 /** 708 * Return a movie object associated with the particular resource ID. 709 * @param id The desired resource identifier, as generated by the aapt 710 * tool. This integer encodes the package, type, and resource 711 * entry. The value 0 is an invalid identifier. 712 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 713 * 714 */ 715 public Movie getMovie(int id) throws NotFoundException { 716 InputStream is = openRawResource(id); 717 Movie movie = Movie.decodeStream(is); 718 try { 719 is.close(); 720 } 721 catch (java.io.IOException e) { 722 // don't care, since the return value is valid 723 } 724 return movie; 725 } 726 727 /** 728 * Return a color integer associated with a particular resource ID. 729 * If the resource holds a complex 730 * {@link android.content.res.ColorStateList}, then the default color from 731 * the set is returned. 732 * 733 * @param id The desired resource identifier, as generated by the aapt 734 * tool. This integer encodes the package, type, and resource 735 * entry. The value 0 is an invalid identifier. 736 * 737 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 738 * 739 * @return Returns a single color value in the form 0xAARRGGBB. 740 */ 741 public int getColor(int id) throws NotFoundException { 742 synchronized (mTmpValue) { 743 TypedValue value = mTmpValue; 744 getValue(id, value, true); 745 if (value.type >= TypedValue.TYPE_FIRST_INT 746 && value.type <= TypedValue.TYPE_LAST_INT) { 747 return value.data; 748 } else if (value.type == TypedValue.TYPE_STRING) { 749 ColorStateList csl = loadColorStateList(mTmpValue, id); 750 return csl.getDefaultColor(); 751 } 752 throw new NotFoundException( 753 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 754 + Integer.toHexString(value.type) + " is not valid"); 755 } 756 } 757 758 /** 759 * Return a color state list associated with a particular resource ID. The 760 * resource may contain either a single raw color value, or a complex 761 * {@link android.content.res.ColorStateList} holding multiple possible colors. 762 * 763 * @param id The desired resource identifier of a {@link ColorStateList}, 764 * as generated by the aapt tool. This integer encodes the package, type, and resource 765 * entry. The value 0 is an invalid identifier. 766 * 767 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 768 * 769 * @return Returns a ColorStateList object containing either a single 770 * solid color or multiple colors that can be selected based on a state. 771 */ 772 public ColorStateList getColorStateList(int id) throws NotFoundException { 773 synchronized (mTmpValue) { 774 TypedValue value = mTmpValue; 775 getValue(id, value, true); 776 return loadColorStateList(value, id); 777 } 778 } 779 780 /** 781 * Return a boolean associated with a particular resource ID. This can be 782 * used with any integral resource value, and will return true if it is 783 * non-zero. 784 * 785 * @param id The desired resource identifier, as generated by the aapt 786 * tool. This integer encodes the package, type, and resource 787 * entry. The value 0 is an invalid identifier. 788 * 789 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 790 * 791 * @return Returns the boolean value contained in the resource. 792 */ 793 public boolean getBoolean(int id) throws NotFoundException { 794 synchronized (mTmpValue) { 795 TypedValue value = mTmpValue; 796 getValue(id, value, true); 797 if (value.type >= TypedValue.TYPE_FIRST_INT 798 && value.type <= TypedValue.TYPE_LAST_INT) { 799 return value.data != 0; 800 } 801 throw new NotFoundException( 802 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 803 + Integer.toHexString(value.type) + " is not valid"); 804 } 805 } 806 807 /** 808 * Return an integer associated with a particular resource ID. 809 * 810 * @param id The desired resource identifier, as generated by the aapt 811 * tool. This integer encodes the package, type, and resource 812 * entry. The value 0 is an invalid identifier. 813 * 814 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 815 * 816 * @return Returns the integer value contained in the resource. 817 */ 818 public int getInteger(int id) throws NotFoundException { 819 synchronized (mTmpValue) { 820 TypedValue value = mTmpValue; 821 getValue(id, value, true); 822 if (value.type >= TypedValue.TYPE_FIRST_INT 823 && value.type <= TypedValue.TYPE_LAST_INT) { 824 return value.data; 825 } 826 throw new NotFoundException( 827 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 828 + Integer.toHexString(value.type) + " is not valid"); 829 } 830 } 831 832 /** 833 * Return an XmlResourceParser through which you can read a view layout 834 * description for the given resource ID. This parser has limited 835 * functionality -- in particular, you can't change its input, and only 836 * the high-level events are available. 837 * 838 * <p>This function is really a simple wrapper for calling 839 * {@link #getXml} with a layout resource. 840 * 841 * @param id The desired resource identifier, as generated by the aapt 842 * tool. This integer encodes the package, type, and resource 843 * entry. The value 0 is an invalid identifier. 844 * 845 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 846 * 847 * @return A new parser object through which you can read 848 * the XML data. 849 * 850 * @see #getXml 851 */ 852 public XmlResourceParser getLayout(int id) throws NotFoundException { 853 return loadXmlResourceParser(id, "layout"); 854 } 855 856 /** 857 * Return an XmlResourceParser through which you can read an animation 858 * description for the given resource ID. This parser has limited 859 * functionality -- in particular, you can't change its input, and only 860 * the high-level events are available. 861 * 862 * <p>This function is really a simple wrapper for calling 863 * {@link #getXml} with an animation resource. 864 * 865 * @param id The desired resource identifier, as generated by the aapt 866 * tool. This integer encodes the package, type, and resource 867 * entry. The value 0 is an invalid identifier. 868 * 869 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 870 * 871 * @return A new parser object through which you can read 872 * the XML data. 873 * 874 * @see #getXml 875 */ 876 public XmlResourceParser getAnimation(int id) throws NotFoundException { 877 return loadXmlResourceParser(id, "anim"); 878 } 879 880 /** 881 * Return an XmlResourceParser through which you can read a generic XML 882 * resource for the given resource ID. 883 * 884 * <p>The XmlPullParser implementation returned here has some limited 885 * functionality. In particular, you can't change its input, and only 886 * high-level parsing events are available (since the document was 887 * pre-parsed for you at build time, which involved merging text and 888 * stripping comments). 889 * 890 * @param id The desired resource identifier, as generated by the aapt 891 * tool. This integer encodes the package, type, and resource 892 * entry. The value 0 is an invalid identifier. 893 * 894 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 895 * 896 * @return A new parser object through which you can read 897 * the XML data. 898 * 899 * @see android.util.AttributeSet 900 */ 901 public XmlResourceParser getXml(int id) throws NotFoundException { 902 return loadXmlResourceParser(id, "xml"); 903 } 904 905 /** 906 * Open a data stream for reading a raw resource. This can only be used 907 * with resources whose value is the name of an asset files -- that is, it can be 908 * used to open drawable, sound, and raw resources; it will fail on string 909 * and color resources. 910 * 911 * @param id The resource identifier to open, as generated by the appt 912 * tool. 913 * 914 * @return InputStream Access to the resource data. 915 * 916 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 917 * 918 */ 919 public InputStream openRawResource(int id) throws NotFoundException { 920 synchronized (mTmpValue) { 921 return openRawResource(id, mTmpValue); 922 } 923 } 924 925 /** 926 * Open a data stream for reading a raw resource. This can only be used 927 * with resources whose value is the name of an asset file -- that is, it can be 928 * used to open drawable, sound, and raw resources; it will fail on string 929 * and color resources. 930 * 931 * @param id The resource identifier to open, as generated by the appt tool. 932 * @param value The TypedValue object to hold the resource information. 933 * 934 * @return InputStream Access to the resource data. 935 * 936 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 937 */ 938 public InputStream openRawResource(int id, TypedValue value) throws NotFoundException { 939 getValue(id, value, true); 940 941 try { 942 return mAssets.openNonAsset(value.assetCookie, value.string.toString(), 943 AssetManager.ACCESS_STREAMING); 944 } catch (Exception e) { 945 NotFoundException rnf = new NotFoundException("File " + value.string.toString() + 946 " from drawable resource ID #0x" + Integer.toHexString(id)); 947 rnf.initCause(e); 948 throw rnf; 949 } 950 } 951 952 /** 953 * Open a file descriptor for reading a raw resource. This can only be used 954 * with resources whose value is the name of an asset files -- that is, it can be 955 * used to open drawable, sound, and raw resources; it will fail on string 956 * and color resources. 957 * 958 * <p>This function only works for resources that are stored in the package 959 * as uncompressed data, which typically includes things like mp3 files 960 * and png images. 961 * 962 * @param id The resource identifier to open, as generated by the appt 963 * tool. 964 * 965 * @return AssetFileDescriptor A new file descriptor you can use to read 966 * the resource. This includes the file descriptor itself, as well as the 967 * offset and length of data where the resource appears in the file. A 968 * null is returned if the file exists but is compressed. 969 * 970 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 971 * 972 */ 973 public AssetFileDescriptor openRawResourceFd(int id) throws NotFoundException { 974 synchronized (mTmpValue) { 975 TypedValue value = mTmpValue; 976 getValue(id, value, true); 977 978 try { 979 return mAssets.openNonAssetFd( 980 value.assetCookie, value.string.toString()); 981 } catch (Exception e) { 982 NotFoundException rnf = new NotFoundException( 983 "File " + value.string.toString() 984 + " from drawable resource ID #0x" 985 + Integer.toHexString(id)); 986 rnf.initCause(e); 987 throw rnf; 988 } 989 990 } 991 } 992 993 /** 994 * Return the raw data associated with a particular resource ID. 995 * 996 * @param id The desired resource identifier, as generated by the aapt 997 * tool. This integer encodes the package, type, and resource 998 * entry. The value 0 is an invalid identifier. 999 * @param outValue Object in which to place the resource data. 1000 * @param resolveRefs If true, a resource that is a reference to another 1001 * resource will be followed so that you receive the 1002 * actual final resource data. If false, the TypedValue 1003 * will be filled in with the reference itself. 1004 * 1005 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1006 * 1007 */ 1008 public void getValue(int id, TypedValue outValue, boolean resolveRefs) 1009 throws NotFoundException { 1010 boolean found = mAssets.getResourceValue(id, 0, outValue, resolveRefs); 1011 if (found) { 1012 return; 1013 } 1014 throw new NotFoundException("Resource ID #0x" 1015 + Integer.toHexString(id)); 1016 } 1017 1018 /** 1019 * Get the raw value associated with a resource with associated density. 1020 * 1021 * @param id resource identifier 1022 * @param density density in DPI 1023 * @param resolveRefs If true, a resource that is a reference to another 1024 * resource will be followed so that you receive the actual final 1025 * resource data. If false, the TypedValue will be filled in with 1026 * the reference itself. 1027 * @throws NotFoundException Throws NotFoundException if the given ID does 1028 * not exist. 1029 * @see #getValue(String, TypedValue, boolean) 1030 * @hide 1031 */ 1032 public void getValueForDensity(int id, int density, TypedValue outValue, boolean resolveRefs) 1033 throws NotFoundException { 1034 boolean found = mAssets.getResourceValue(id, density, outValue, resolveRefs); 1035 if (found) { 1036 return; 1037 } 1038 throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)); 1039 } 1040 1041 /** 1042 * Return the raw data associated with a particular resource ID. 1043 * See getIdentifier() for information on how names are mapped to resource 1044 * IDs, and getString(int) for information on how string resources are 1045 * retrieved. 1046 * 1047 * <p>Note: use of this function is discouraged. It is much more 1048 * efficient to retrieve resources by identifier than by name. 1049 * 1050 * @param name The name of the desired resource. This is passed to 1051 * getIdentifier() with a default type of "string". 1052 * @param outValue Object in which to place the resource data. 1053 * @param resolveRefs If true, a resource that is a reference to another 1054 * resource will be followed so that you receive the 1055 * actual final resource data. If false, the TypedValue 1056 * will be filled in with the reference itself. 1057 * 1058 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1059 * 1060 */ 1061 public void getValue(String name, TypedValue outValue, boolean resolveRefs) 1062 throws NotFoundException { 1063 int id = getIdentifier(name, "string", null); 1064 if (id != 0) { 1065 getValue(id, outValue, resolveRefs); 1066 return; 1067 } 1068 throw new NotFoundException("String resource name " + name); 1069 } 1070 1071 /** 1072 * This class holds the current attribute values for a particular theme. 1073 * In other words, a Theme is a set of values for resource attributes; 1074 * these are used in conjunction with {@link TypedArray} 1075 * to resolve the final value for an attribute. 1076 * 1077 * <p>The Theme's attributes come into play in two ways: (1) a styled 1078 * attribute can explicit reference a value in the theme through the 1079 * "?themeAttribute" syntax; (2) if no value has been defined for a 1080 * particular styled attribute, as a last resort we will try to find that 1081 * attribute's value in the Theme. 1082 * 1083 * <p>You will normally use the {@link #obtainStyledAttributes} APIs to 1084 * retrieve XML attributes with style and theme information applied. 1085 */ 1086 public final class Theme { 1087 /** 1088 * Place new attribute values into the theme. The style resource 1089 * specified by <var>resid</var> will be retrieved from this Theme's 1090 * resources, its values placed into the Theme object. 1091 * 1092 * <p>The semantics of this function depends on the <var>force</var> 1093 * argument: If false, only values that are not already defined in 1094 * the theme will be copied from the system resource; otherwise, if 1095 * any of the style's attributes are already defined in the theme, the 1096 * current values in the theme will be overwritten. 1097 * 1098 * @param resid The resource ID of a style resource from which to 1099 * obtain attribute values. 1100 * @param force If true, values in the style resource will always be 1101 * used in the theme; otherwise, they will only be used 1102 * if not already defined in the theme. 1103 */ 1104 public void applyStyle(int resid, boolean force) { 1105 AssetManager.applyThemeStyle(mTheme, resid, force); 1106 } 1107 1108 /** 1109 * Set this theme to hold the same contents as the theme 1110 * <var>other</var>. If both of these themes are from the same 1111 * Resources object, they will be identical after this function 1112 * returns. If they are from different Resources, only the resources 1113 * they have in common will be set in this theme. 1114 * 1115 * @param other The existing Theme to copy from. 1116 */ 1117 public void setTo(Theme other) { 1118 AssetManager.copyTheme(mTheme, other.mTheme); 1119 } 1120 1121 /** 1122 * Return a StyledAttributes holding the values defined by 1123 * <var>Theme</var> which are listed in <var>attrs</var>. 1124 * 1125 * <p>Be sure to call StyledAttributes.recycle() when you are done with 1126 * the array. 1127 * 1128 * @param attrs The desired attributes. 1129 * 1130 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1131 * 1132 * @return Returns a TypedArray holding an array of the attribute values. 1133 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1134 * when done with it. 1135 * 1136 * @see Resources#obtainAttributes 1137 * @see #obtainStyledAttributes(int, int[]) 1138 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1139 */ 1140 public TypedArray obtainStyledAttributes(int[] attrs) { 1141 int len = attrs.length; 1142 TypedArray array = getCachedStyledAttributes(len); 1143 array.mRsrcs = attrs; 1144 AssetManager.applyStyle(mTheme, 0, 0, 0, attrs, 1145 array.mData, array.mIndices); 1146 return array; 1147 } 1148 1149 /** 1150 * Return a StyledAttributes holding the values defined by the style 1151 * resource <var>resid</var> which are listed in <var>attrs</var>. 1152 * 1153 * <p>Be sure to call StyledAttributes.recycle() when you are done with 1154 * the array. 1155 * 1156 * @param resid The desired style resource. 1157 * @param attrs The desired attributes in the style. 1158 * 1159 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1160 * 1161 * @return Returns a TypedArray holding an array of the attribute values. 1162 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1163 * when done with it. 1164 * 1165 * @see Resources#obtainAttributes 1166 * @see #obtainStyledAttributes(int[]) 1167 * @see #obtainStyledAttributes(AttributeSet, int[], int, int) 1168 */ 1169 public TypedArray obtainStyledAttributes(int resid, int[] attrs) 1170 throws NotFoundException { 1171 int len = attrs.length; 1172 TypedArray array = getCachedStyledAttributes(len); 1173 array.mRsrcs = attrs; 1174 1175 AssetManager.applyStyle(mTheme, 0, resid, 0, attrs, 1176 array.mData, array.mIndices); 1177 if (false) { 1178 int[] data = array.mData; 1179 1180 System.out.println("**********************************************************"); 1181 System.out.println("**********************************************************"); 1182 System.out.println("**********************************************************"); 1183 System.out.println("Attributes:"); 1184 String s = " Attrs:"; 1185 int i; 1186 for (i=0; i<attrs.length; i++) { 1187 s = s + " 0x" + Integer.toHexString(attrs[i]); 1188 } 1189 System.out.println(s); 1190 s = " Found:"; 1191 TypedValue value = new TypedValue(); 1192 for (i=0; i<attrs.length; i++) { 1193 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1194 value.type = data[d+AssetManager.STYLE_TYPE]; 1195 value.data = data[d+AssetManager.STYLE_DATA]; 1196 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1197 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1198 s = s + " 0x" + Integer.toHexString(attrs[i]) 1199 + "=" + value; 1200 } 1201 System.out.println(s); 1202 } 1203 return array; 1204 } 1205 1206 /** 1207 * Return a StyledAttributes holding the attribute values in 1208 * <var>set</var> 1209 * that are listed in <var>attrs</var>. In addition, if the given 1210 * AttributeSet specifies a style class (through the "style" attribute), 1211 * that style will be applied on top of the base attributes it defines. 1212 * 1213 * <p>Be sure to call StyledAttributes.recycle() when you are done with 1214 * the array. 1215 * 1216 * <p>When determining the final value of a particular attribute, there 1217 * are four inputs that come into play:</p> 1218 * 1219 * <ol> 1220 * <li> Any attribute values in the given AttributeSet. 1221 * <li> The style resource specified in the AttributeSet (named 1222 * "style"). 1223 * <li> The default style specified by <var>defStyleAttr</var> and 1224 * <var>defStyleRes</var> 1225 * <li> The base values in this theme. 1226 * </ol> 1227 * 1228 * <p>Each of these inputs is considered in-order, with the first listed 1229 * taking precedence over the following ones. In other words, if in the 1230 * AttributeSet you have supplied <code><Button 1231 * textColor="#ff000000"></code>, then the button's text will 1232 * <em>always</em> be black, regardless of what is specified in any of 1233 * the styles. 1234 * 1235 * @param set The base set of attribute values. May be null. 1236 * @param attrs The desired attributes to be retrieved. 1237 * @param defStyleAttr An attribute in the current theme that contains a 1238 * reference to a style resource that supplies 1239 * defaults values for the StyledAttributes. Can be 1240 * 0 to not look for defaults. 1241 * @param defStyleRes A resource identifier of a style resource that 1242 * supplies default values for the StyledAttributes, 1243 * used only if defStyleAttr is 0 or can not be found 1244 * in the theme. Can be 0 to not look for defaults. 1245 * 1246 * @return Returns a TypedArray holding an array of the attribute values. 1247 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1248 * when done with it. 1249 * 1250 * @see Resources#obtainAttributes 1251 * @see #obtainStyledAttributes(int[]) 1252 * @see #obtainStyledAttributes(int, int[]) 1253 */ 1254 public TypedArray obtainStyledAttributes(AttributeSet set, 1255 int[] attrs, int defStyleAttr, int defStyleRes) { 1256 int len = attrs.length; 1257 TypedArray array = getCachedStyledAttributes(len); 1258 1259 // XXX note that for now we only work with compiled XML files. 1260 // To support generic XML files we will need to manually parse 1261 // out the attributes from the XML file (applying type information 1262 // contained in the resources and such). 1263 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1264 AssetManager.applyStyle( 1265 mTheme, defStyleAttr, defStyleRes, 1266 parser != null ? parser.mParseState : 0, attrs, 1267 array.mData, array.mIndices); 1268 1269 array.mRsrcs = attrs; 1270 array.mXml = parser; 1271 1272 if (false) { 1273 int[] data = array.mData; 1274 1275 System.out.println("Attributes:"); 1276 String s = " Attrs:"; 1277 int i; 1278 for (i=0; i<set.getAttributeCount(); i++) { 1279 s = s + " " + set.getAttributeName(i); 1280 int id = set.getAttributeNameResource(i); 1281 if (id != 0) { 1282 s = s + "(0x" + Integer.toHexString(id) + ")"; 1283 } 1284 s = s + "=" + set.getAttributeValue(i); 1285 } 1286 System.out.println(s); 1287 s = " Found:"; 1288 TypedValue value = new TypedValue(); 1289 for (i=0; i<attrs.length; i++) { 1290 int d = i*AssetManager.STYLE_NUM_ENTRIES; 1291 value.type = data[d+AssetManager.STYLE_TYPE]; 1292 value.data = data[d+AssetManager.STYLE_DATA]; 1293 value.assetCookie = data[d+AssetManager.STYLE_ASSET_COOKIE]; 1294 value.resourceId = data[d+AssetManager.STYLE_RESOURCE_ID]; 1295 s = s + " 0x" + Integer.toHexString(attrs[i]) 1296 + "=" + value; 1297 } 1298 System.out.println(s); 1299 } 1300 1301 return array; 1302 } 1303 1304 /** 1305 * Retrieve the value of an attribute in the Theme. The contents of 1306 * <var>outValue</var> are ultimately filled in by 1307 * {@link Resources#getValue}. 1308 * 1309 * @param resid The resource identifier of the desired theme 1310 * attribute. 1311 * @param outValue Filled in with the ultimate resource value supplied 1312 * by the attribute. 1313 * @param resolveRefs If true, resource references will be walked; if 1314 * false, <var>outValue</var> may be a 1315 * TYPE_REFERENCE. In either case, it will never 1316 * be a TYPE_ATTRIBUTE. 1317 * 1318 * @return boolean Returns true if the attribute was found and 1319 * <var>outValue</var> is valid, else false. 1320 */ 1321 public boolean resolveAttribute(int resid, TypedValue outValue, 1322 boolean resolveRefs) { 1323 boolean got = mAssets.getThemeValue(mTheme, resid, outValue, resolveRefs); 1324 if (false) { 1325 System.out.println( 1326 "resolveAttribute #" + Integer.toHexString(resid) 1327 + " got=" + got + ", type=0x" + Integer.toHexString(outValue.type) 1328 + ", data=0x" + Integer.toHexString(outValue.data)); 1329 } 1330 return got; 1331 } 1332 1333 /** 1334 * Print contents of this theme out to the log. For debugging only. 1335 * 1336 * @param priority The log priority to use. 1337 * @param tag The log tag to use. 1338 * @param prefix Text to prefix each line printed. 1339 */ 1340 public void dump(int priority, String tag, String prefix) { 1341 AssetManager.dumpTheme(mTheme, priority, tag, prefix); 1342 } 1343 1344 protected void finalize() throws Throwable { 1345 super.finalize(); 1346 mAssets.releaseTheme(mTheme); 1347 } 1348 1349 /*package*/ Theme() { 1350 mAssets = Resources.this.mAssets; 1351 mTheme = mAssets.createTheme(); 1352 } 1353 1354 private final AssetManager mAssets; 1355 private final int mTheme; 1356 } 1357 1358 /** 1359 * Generate a new Theme object for this set of Resources. It initially 1360 * starts out empty. 1361 * 1362 * @return Theme The newly created Theme container. 1363 */ 1364 public final Theme newTheme() { 1365 return new Theme(); 1366 } 1367 1368 /** 1369 * Retrieve a set of basic attribute values from an AttributeSet, not 1370 * performing styling of them using a theme and/or style resources. 1371 * 1372 * @param set The current attribute values to retrieve. 1373 * @param attrs The specific attributes to be retrieved. 1374 * @return Returns a TypedArray holding an array of the attribute values. 1375 * Be sure to call {@link TypedArray#recycle() TypedArray.recycle()} 1376 * when done with it. 1377 * 1378 * @see Theme#obtainStyledAttributes(AttributeSet, int[], int, int) 1379 */ 1380 public TypedArray obtainAttributes(AttributeSet set, int[] attrs) { 1381 int len = attrs.length; 1382 TypedArray array = getCachedStyledAttributes(len); 1383 1384 // XXX note that for now we only work with compiled XML files. 1385 // To support generic XML files we will need to manually parse 1386 // out the attributes from the XML file (applying type information 1387 // contained in the resources and such). 1388 XmlBlock.Parser parser = (XmlBlock.Parser)set; 1389 mAssets.retrieveAttributes(parser.mParseState, attrs, 1390 array.mData, array.mIndices); 1391 1392 array.mRsrcs = attrs; 1393 array.mXml = parser; 1394 1395 return array; 1396 } 1397 1398 /** 1399 * Store the newly updated configuration. 1400 */ 1401 public void updateConfiguration(Configuration config, 1402 DisplayMetrics metrics) { 1403 synchronized (mTmpValue) { 1404 int configChanges = 0xfffffff; 1405 if (config != null) { 1406 configChanges = mConfiguration.updateFrom(config); 1407 } 1408 if (mConfiguration.locale == null) { 1409 mConfiguration.locale = Locale.getDefault(); 1410 } 1411 if (metrics != null) { 1412 mMetrics.setTo(metrics); 1413 mMetrics.updateMetrics(mCompatibilityInfo, 1414 mConfiguration.orientation, mConfiguration.screenLayout); 1415 } 1416 mMetrics.scaledDensity = mMetrics.density * mConfiguration.fontScale; 1417 1418 String locale = null; 1419 if (mConfiguration.locale != null) { 1420 locale = mConfiguration.locale.getLanguage(); 1421 if (mConfiguration.locale.getCountry() != null) { 1422 locale += "-" + mConfiguration.locale.getCountry(); 1423 } 1424 } 1425 int width, height; 1426 if (mMetrics.widthPixels >= mMetrics.heightPixels) { 1427 width = mMetrics.widthPixels; 1428 height = mMetrics.heightPixels; 1429 } else { 1430 //noinspection SuspiciousNameCombination 1431 width = mMetrics.heightPixels; 1432 //noinspection SuspiciousNameCombination 1433 height = mMetrics.widthPixels; 1434 } 1435 int keyboardHidden = mConfiguration.keyboardHidden; 1436 if (keyboardHidden == Configuration.KEYBOARDHIDDEN_NO 1437 && mConfiguration.hardKeyboardHidden 1438 == Configuration.HARDKEYBOARDHIDDEN_YES) { 1439 keyboardHidden = Configuration.KEYBOARDHIDDEN_SOFT; 1440 } 1441 mAssets.setConfiguration(mConfiguration.mcc, mConfiguration.mnc, 1442 locale, mConfiguration.orientation, 1443 mConfiguration.touchscreen, 1444 (int)(mMetrics.density*160), mConfiguration.keyboard, 1445 keyboardHidden, mConfiguration.navigation, width, height, 1446 mConfiguration.screenLayout, mConfiguration.uiMode, 1447 Build.VERSION.RESOURCES_SDK_INT); 1448 1449 clearDrawableCache(mDrawableCache, configChanges); 1450 clearDrawableCache(mColorDrawableCache, configChanges); 1451 1452 mColorStateListCache.clear(); 1453 1454 flushLayoutCache(); 1455 } 1456 synchronized (mSync) { 1457 if (mPluralRule != null) { 1458 mPluralRule = NativePluralRules.forLocale(config.locale); 1459 } 1460 } 1461 } 1462 1463 private void clearDrawableCache( 1464 LongSparseArray<WeakReference<ConstantState>> cache, 1465 int configChanges) { 1466 int N = cache.size(); 1467 if (DEBUG_CONFIG) { 1468 Log.d(TAG, "Cleaning up drawables config changes: 0x" 1469 + Integer.toHexString(configChanges)); 1470 } 1471 for (int i=0; i<N; i++) { 1472 WeakReference<Drawable.ConstantState> ref = cache.valueAt(i); 1473 if (ref != null) { 1474 Drawable.ConstantState cs = ref.get(); 1475 if (cs != null) { 1476 if (Configuration.needNewResources( 1477 configChanges, cs.getChangingConfigurations())) { 1478 if (DEBUG_CONFIG) { 1479 Log.d(TAG, "FLUSHING #0x" 1480 + Long.toHexString(mDrawableCache.keyAt(i)) 1481 + " / " + cs + " with changes: 0x" 1482 + Integer.toHexString(cs.getChangingConfigurations())); 1483 } 1484 cache.setValueAt(i, null); 1485 } else if (DEBUG_CONFIG) { 1486 Log.d(TAG, "(Keeping #0x" 1487 + Long.toHexString(cache.keyAt(i)) 1488 + " / " + cs + " with changes: 0x" 1489 + Integer.toHexString(cs.getChangingConfigurations()) 1490 + ")"); 1491 } 1492 } 1493 } 1494 } 1495 } 1496 1497 /** 1498 * Update the system resources configuration if they have previously 1499 * been initialized. 1500 * 1501 * @hide 1502 */ 1503 public static void updateSystemConfiguration(Configuration config, DisplayMetrics metrics) { 1504 if (mSystem != null) { 1505 mSystem.updateConfiguration(config, metrics); 1506 //Log.i(TAG, "Updated system resources " + mSystem 1507 // + ": " + mSystem.getConfiguration()); 1508 } 1509 } 1510 1511 /** 1512 * Return the current display metrics that are in effect for this resource 1513 * object. The returned object should be treated as read-only. 1514 * 1515 * @return The resource's current display metrics. 1516 */ 1517 public DisplayMetrics getDisplayMetrics() { 1518 return mMetrics; 1519 } 1520 1521 /** 1522 * Return the current configuration that is in effect for this resource 1523 * object. The returned object should be treated as read-only. 1524 * 1525 * @return The resource's current configuration. 1526 */ 1527 public Configuration getConfiguration() { 1528 return mConfiguration; 1529 } 1530 1531 /** 1532 * Return the compatibility mode information for the application. 1533 * The returned object should be treated as read-only. 1534 * 1535 * @return compatibility info. null if the app does not require compatibility mode. 1536 * @hide 1537 */ 1538 public CompatibilityInfo getCompatibilityInfo() { 1539 return mCompatibilityInfo; 1540 } 1541 1542 /** 1543 * This is just for testing. 1544 * @hide 1545 */ 1546 public void setCompatibilityInfo(CompatibilityInfo ci) { 1547 mCompatibilityInfo = ci; 1548 updateConfiguration(mConfiguration, mMetrics); 1549 } 1550 1551 /** 1552 * Return a resource identifier for the given resource name. A fully 1553 * qualified resource name is of the form "package:type/entry". The first 1554 * two components (package and type) are optional if defType and 1555 * defPackage, respectively, are specified here. 1556 * 1557 * <p>Note: use of this function is discouraged. It is much more 1558 * efficient to retrieve resources by identifier than by name. 1559 * 1560 * @param name The name of the desired resource. 1561 * @param defType Optional default resource type to find, if "type/" is 1562 * not included in the name. Can be null to require an 1563 * explicit type. 1564 * @param defPackage Optional default package to find, if "package:" is 1565 * not included in the name. Can be null to require an 1566 * explicit package. 1567 * 1568 * @return int The associated resource identifier. Returns 0 if no such 1569 * resource was found. (0 is not a valid resource ID.) 1570 */ 1571 public int getIdentifier(String name, String defType, String defPackage) { 1572 try { 1573 return Integer.parseInt(name); 1574 } catch (Exception e) { 1575 // Ignore 1576 } 1577 return mAssets.getResourceIdentifier(name, defType, defPackage); 1578 } 1579 1580 /** 1581 * Return the full name for a given resource identifier. This name is 1582 * a single string of the form "package:type/entry". 1583 * 1584 * @param resid The resource identifier whose name is to be retrieved. 1585 * 1586 * @return A string holding the name of the resource. 1587 * 1588 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1589 * 1590 * @see #getResourcePackageName 1591 * @see #getResourceTypeName 1592 * @see #getResourceEntryName 1593 */ 1594 public String getResourceName(int resid) throws NotFoundException { 1595 String str = mAssets.getResourceName(resid); 1596 if (str != null) return str; 1597 throw new NotFoundException("Unable to find resource ID #0x" 1598 + Integer.toHexString(resid)); 1599 } 1600 1601 /** 1602 * Return the package name for a given resource identifier. 1603 * 1604 * @param resid The resource identifier whose package name is to be 1605 * retrieved. 1606 * 1607 * @return A string holding the package name of the resource. 1608 * 1609 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1610 * 1611 * @see #getResourceName 1612 */ 1613 public String getResourcePackageName(int resid) throws NotFoundException { 1614 String str = mAssets.getResourcePackageName(resid); 1615 if (str != null) return str; 1616 throw new NotFoundException("Unable to find resource ID #0x" 1617 + Integer.toHexString(resid)); 1618 } 1619 1620 /** 1621 * Return the type name for a given resource identifier. 1622 * 1623 * @param resid The resource identifier whose type name is to be 1624 * retrieved. 1625 * 1626 * @return A string holding the type name of the resource. 1627 * 1628 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1629 * 1630 * @see #getResourceName 1631 */ 1632 public String getResourceTypeName(int resid) throws NotFoundException { 1633 String str = mAssets.getResourceTypeName(resid); 1634 if (str != null) return str; 1635 throw new NotFoundException("Unable to find resource ID #0x" 1636 + Integer.toHexString(resid)); 1637 } 1638 1639 /** 1640 * Return the entry name for a given resource identifier. 1641 * 1642 * @param resid The resource identifier whose entry name is to be 1643 * retrieved. 1644 * 1645 * @return A string holding the entry name of the resource. 1646 * 1647 * @throws NotFoundException Throws NotFoundException if the given ID does not exist. 1648 * 1649 * @see #getResourceName 1650 */ 1651 public String getResourceEntryName(int resid) throws NotFoundException { 1652 String str = mAssets.getResourceEntryName(resid); 1653 if (str != null) return str; 1654 throw new NotFoundException("Unable to find resource ID #0x" 1655 + Integer.toHexString(resid)); 1656 } 1657 1658 /** 1659 * Parse a series of {@link android.R.styleable#Extra <extra>} tags from 1660 * an XML file. You call this when you are at the parent tag of the 1661 * extra tags, and it will return once all of the child tags have been parsed. 1662 * This will call {@link #parseBundleExtra} for each extra tag encountered. 1663 * 1664 * @param parser The parser from which to retrieve the extras. 1665 * @param outBundle A Bundle in which to place all parsed extras. 1666 * @throws XmlPullParserException 1667 * @throws IOException 1668 */ 1669 public void parseBundleExtras(XmlResourceParser parser, Bundle outBundle) 1670 throws XmlPullParserException, IOException { 1671 int outerDepth = parser.getDepth(); 1672 int type; 1673 while ((type=parser.next()) != XmlPullParser.END_DOCUMENT 1674 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 1675 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 1676 continue; 1677 } 1678 1679 String nodeName = parser.getName(); 1680 if (nodeName.equals("extra")) { 1681 parseBundleExtra("extra", parser, outBundle); 1682 XmlUtils.skipCurrentTag(parser); 1683 1684 } else { 1685 XmlUtils.skipCurrentTag(parser); 1686 } 1687 } 1688 } 1689 1690 /** 1691 * Parse a name/value pair out of an XML tag holding that data. The 1692 * AttributeSet must be holding the data defined by 1693 * {@link android.R.styleable#Extra}. The following value types are supported: 1694 * <ul> 1695 * <li> {@link TypedValue#TYPE_STRING}: 1696 * {@link Bundle#putCharSequence Bundle.putCharSequence()} 1697 * <li> {@link TypedValue#TYPE_INT_BOOLEAN}: 1698 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1699 * <li> {@link TypedValue#TYPE_FIRST_INT}-{@link TypedValue#TYPE_LAST_INT}: 1700 * {@link Bundle#putCharSequence Bundle.putBoolean()} 1701 * <li> {@link TypedValue#TYPE_FLOAT}: 1702 * {@link Bundle#putCharSequence Bundle.putFloat()} 1703 * </ul> 1704 * 1705 * @param tagName The name of the tag these attributes come from; this is 1706 * only used for reporting error messages. 1707 * @param attrs The attributes from which to retrieve the name/value pair. 1708 * @param outBundle The Bundle in which to place the parsed value. 1709 * @throws XmlPullParserException If the attributes are not valid. 1710 */ 1711 public void parseBundleExtra(String tagName, AttributeSet attrs, 1712 Bundle outBundle) throws XmlPullParserException { 1713 TypedArray sa = obtainAttributes(attrs, 1714 com.android.internal.R.styleable.Extra); 1715 1716 String name = sa.getString( 1717 com.android.internal.R.styleable.Extra_name); 1718 if (name == null) { 1719 sa.recycle(); 1720 throw new XmlPullParserException("<" + tagName 1721 + "> requires an android:name attribute at " 1722 + attrs.getPositionDescription()); 1723 } 1724 1725 TypedValue v = sa.peekValue( 1726 com.android.internal.R.styleable.Extra_value); 1727 if (v != null) { 1728 if (v.type == TypedValue.TYPE_STRING) { 1729 CharSequence cs = v.coerceToString(); 1730 outBundle.putCharSequence(name, cs); 1731 } else if (v.type == TypedValue.TYPE_INT_BOOLEAN) { 1732 outBundle.putBoolean(name, v.data != 0); 1733 } else if (v.type >= TypedValue.TYPE_FIRST_INT 1734 && v.type <= TypedValue.TYPE_LAST_INT) { 1735 outBundle.putInt(name, v.data); 1736 } else if (v.type == TypedValue.TYPE_FLOAT) { 1737 outBundle.putFloat(name, v.getFloat()); 1738 } else { 1739 sa.recycle(); 1740 throw new XmlPullParserException("<" + tagName 1741 + "> only supports string, integer, float, color, and boolean at " 1742 + attrs.getPositionDescription()); 1743 } 1744 } else { 1745 sa.recycle(); 1746 throw new XmlPullParserException("<" + tagName 1747 + "> requires an android:value or android:resource attribute at " 1748 + attrs.getPositionDescription()); 1749 } 1750 1751 sa.recycle(); 1752 } 1753 1754 /** 1755 * Retrieve underlying AssetManager storage for these resources. 1756 */ 1757 public final AssetManager getAssets() { 1758 return mAssets; 1759 } 1760 1761 /** 1762 * Call this to remove all cached loaded layout resources from the 1763 * Resources object. Only intended for use with performance testing 1764 * tools. 1765 */ 1766 public final void flushLayoutCache() { 1767 synchronized (mCachedXmlBlockIds) { 1768 // First see if this block is in our cache. 1769 final int num = mCachedXmlBlockIds.length; 1770 for (int i=0; i<num; i++) { 1771 mCachedXmlBlockIds[i] = -0; 1772 XmlBlock oldBlock = mCachedXmlBlocks[i]; 1773 if (oldBlock != null) { 1774 oldBlock.close(); 1775 } 1776 mCachedXmlBlocks[i] = null; 1777 } 1778 } 1779 } 1780 1781 /** 1782 * Start preloading of resource data using this Resources object. Only 1783 * for use by the zygote process for loading common system resources. 1784 * {@hide} 1785 */ 1786 public final void startPreloading() { 1787 synchronized (mSync) { 1788 if (mPreloaded) { 1789 throw new IllegalStateException("Resources already preloaded"); 1790 } 1791 mPreloaded = true; 1792 mPreloading = true; 1793 } 1794 } 1795 1796 /** 1797 * Called by zygote when it is done preloading resources, to change back 1798 * to normal Resources operation. 1799 */ 1800 public final void finishPreloading() { 1801 if (mPreloading) { 1802 mPreloading = false; 1803 flushLayoutCache(); 1804 } 1805 } 1806 1807 /*package*/ Drawable loadDrawable(TypedValue value, int id) 1808 throws NotFoundException { 1809 1810 if (TRACE_FOR_PRELOAD) { 1811 // Log only framework resources 1812 if ((id >>> 24) == 0x1) { 1813 final String name = getResourceName(id); 1814 if (name != null) android.util.Log.d("PreloadDrawable", name); 1815 } 1816 } 1817 1818 final long key = (((long) value.assetCookie) << 32) | value.data; 1819 boolean isColorDrawable = false; 1820 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 1821 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 1822 isColorDrawable = true; 1823 } 1824 Drawable dr = getCachedDrawable(isColorDrawable ? mColorDrawableCache : mDrawableCache, key); 1825 1826 if (dr != null) { 1827 return dr; 1828 } 1829 1830 Drawable.ConstantState cs = isColorDrawable ? sPreloadedColorDrawables.get(key) : sPreloadedDrawables.get(key); 1831 if (cs != null) { 1832 dr = cs.newDrawable(this); 1833 } else { 1834 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 1835 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 1836 dr = new ColorDrawable(value.data); 1837 } 1838 1839 if (dr == null) { 1840 if (value.string == null) { 1841 throw new NotFoundException( 1842 "Resource is not a Drawable (color or path): " + value); 1843 } 1844 1845 String file = value.string.toString(); 1846 1847 if (DEBUG_LOAD) Log.v(TAG, "Loading drawable for cookie " 1848 + value.assetCookie + ": " + file); 1849 1850 if (file.endsWith(".xml")) { 1851 try { 1852 XmlResourceParser rp = loadXmlResourceParser( 1853 file, id, value.assetCookie, "drawable"); 1854 dr = Drawable.createFromXml(this, rp); 1855 rp.close(); 1856 } catch (Exception e) { 1857 NotFoundException rnf = new NotFoundException( 1858 "File " + file + " from drawable resource ID #0x" 1859 + Integer.toHexString(id)); 1860 rnf.initCause(e); 1861 throw rnf; 1862 } 1863 1864 } else { 1865 try { 1866 InputStream is = mAssets.openNonAsset( 1867 value.assetCookie, file, AssetManager.ACCESS_STREAMING); 1868 // System.out.println("Opened file " + file + ": " + is); 1869 dr = Drawable.createFromResourceStream(this, value, is, 1870 file, null); 1871 is.close(); 1872 // System.out.println("Created stream: " + dr); 1873 } catch (Exception e) { 1874 NotFoundException rnf = new NotFoundException( 1875 "File " + file + " from drawable resource ID #0x" 1876 + Integer.toHexString(id)); 1877 rnf.initCause(e); 1878 throw rnf; 1879 } 1880 } 1881 } 1882 } 1883 1884 if (dr != null) { 1885 dr.setChangingConfigurations(value.changingConfigurations); 1886 cs = dr.getConstantState(); 1887 if (cs != null) { 1888 if (mPreloading) { 1889 if (isColorDrawable) { 1890 sPreloadedColorDrawables.put(key, cs); 1891 } else { 1892 sPreloadedDrawables.put(key, cs); 1893 } 1894 } else { 1895 synchronized (mTmpValue) { 1896 //Log.i(TAG, "Saving cached drawable @ #" + 1897 // Integer.toHexString(key.intValue()) 1898 // + " in " + this + ": " + cs); 1899 if (isColorDrawable) { 1900 mColorDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 1901 } else { 1902 mDrawableCache.put(key, new WeakReference<Drawable.ConstantState>(cs)); 1903 } 1904 } 1905 } 1906 } 1907 } 1908 1909 return dr; 1910 } 1911 1912 private Drawable getCachedDrawable( 1913 LongSparseArray<WeakReference<ConstantState>> drawableCache, 1914 long key) { 1915 synchronized (mTmpValue) { 1916 WeakReference<Drawable.ConstantState> wr = drawableCache.get(key); 1917 if (wr != null) { // we have the key 1918 Drawable.ConstantState entry = wr.get(); 1919 if (entry != null) { 1920 //Log.i(TAG, "Returning cached drawable @ #" + 1921 // Integer.toHexString(((Integer)key).intValue()) 1922 // + " in " + this + ": " + entry); 1923 return entry.newDrawable(this); 1924 } 1925 else { // our entry has been purged 1926 drawableCache.delete(key); 1927 } 1928 } 1929 } 1930 return null; 1931 } 1932 1933 /*package*/ ColorStateList loadColorStateList(TypedValue value, int id) 1934 throws NotFoundException { 1935 if (TRACE_FOR_PRELOAD) { 1936 // Log only framework resources 1937 if ((id >>> 24) == 0x1) { 1938 final String name = getResourceName(id); 1939 if (name != null) android.util.Log.d("PreloadColorStateList", name); 1940 } 1941 } 1942 1943 final int key = (value.assetCookie << 24) | value.data; 1944 1945 ColorStateList csl; 1946 1947 if (value.type >= TypedValue.TYPE_FIRST_COLOR_INT && 1948 value.type <= TypedValue.TYPE_LAST_COLOR_INT) { 1949 1950 csl = mPreloadedColorStateLists.get(key); 1951 if (csl != null) { 1952 return csl; 1953 } 1954 1955 csl = ColorStateList.valueOf(value.data); 1956 if (mPreloading) { 1957 mPreloadedColorStateLists.put(key, csl); 1958 } 1959 1960 return csl; 1961 } 1962 1963 csl = getCachedColorStateList(key); 1964 if (csl != null) { 1965 return csl; 1966 } 1967 1968 csl = mPreloadedColorStateLists.get(key); 1969 if (csl != null) { 1970 return csl; 1971 } 1972 1973 if (value.string == null) { 1974 throw new NotFoundException( 1975 "Resource is not a ColorStateList (color or path): " + value); 1976 } 1977 1978 String file = value.string.toString(); 1979 1980 if (file.endsWith(".xml")) { 1981 try { 1982 XmlResourceParser rp = loadXmlResourceParser( 1983 file, id, value.assetCookie, "colorstatelist"); 1984 csl = ColorStateList.createFromXml(this, rp); 1985 rp.close(); 1986 } catch (Exception e) { 1987 NotFoundException rnf = new NotFoundException( 1988 "File " + file + " from color state list resource ID #0x" 1989 + Integer.toHexString(id)); 1990 rnf.initCause(e); 1991 throw rnf; 1992 } 1993 } else { 1994 throw new NotFoundException( 1995 "File " + file + " from drawable resource ID #0x" 1996 + Integer.toHexString(id) + ": .xml extension required"); 1997 } 1998 1999 if (csl != null) { 2000 if (mPreloading) { 2001 mPreloadedColorStateLists.put(key, csl); 2002 } else { 2003 synchronized (mTmpValue) { 2004 //Log.i(TAG, "Saving cached color state list @ #" + 2005 // Integer.toHexString(key.intValue()) 2006 // + " in " + this + ": " + csl); 2007 mColorStateListCache.put( 2008 key, new WeakReference<ColorStateList>(csl)); 2009 } 2010 } 2011 } 2012 2013 return csl; 2014 } 2015 2016 private ColorStateList getCachedColorStateList(int key) { 2017 synchronized (mTmpValue) { 2018 WeakReference<ColorStateList> wr = mColorStateListCache.get(key); 2019 if (wr != null) { // we have the key 2020 ColorStateList entry = wr.get(); 2021 if (entry != null) { 2022 //Log.i(TAG, "Returning cached color state list @ #" + 2023 // Integer.toHexString(((Integer)key).intValue()) 2024 // + " in " + this + ": " + entry); 2025 return entry; 2026 } 2027 else { // our entry has been purged 2028 mColorStateListCache.delete(key); 2029 } 2030 } 2031 } 2032 return null; 2033 } 2034 2035 /*package*/ XmlResourceParser loadXmlResourceParser(int id, String type) 2036 throws NotFoundException { 2037 synchronized (mTmpValue) { 2038 TypedValue value = mTmpValue; 2039 getValue(id, value, true); 2040 if (value.type == TypedValue.TYPE_STRING) { 2041 return loadXmlResourceParser(value.string.toString(), id, 2042 value.assetCookie, type); 2043 } 2044 throw new NotFoundException( 2045 "Resource ID #0x" + Integer.toHexString(id) + " type #0x" 2046 + Integer.toHexString(value.type) + " is not valid"); 2047 } 2048 } 2049 2050 /*package*/ XmlResourceParser loadXmlResourceParser(String file, int id, 2051 int assetCookie, String type) throws NotFoundException { 2052 if (id != 0) { 2053 try { 2054 // These may be compiled... 2055 synchronized (mCachedXmlBlockIds) { 2056 // First see if this block is in our cache. 2057 final int num = mCachedXmlBlockIds.length; 2058 for (int i=0; i<num; i++) { 2059 if (mCachedXmlBlockIds[i] == id) { 2060 //System.out.println("**** REUSING XML BLOCK! id=" 2061 // + id + ", index=" + i); 2062 return mCachedXmlBlocks[i].newParser(); 2063 } 2064 } 2065 2066 // Not in the cache, create a new block and put it at 2067 // the next slot in the cache. 2068 XmlBlock block = mAssets.openXmlBlockAsset( 2069 assetCookie, file); 2070 if (block != null) { 2071 int pos = mLastCachedXmlBlockIndex+1; 2072 if (pos >= num) pos = 0; 2073 mLastCachedXmlBlockIndex = pos; 2074 XmlBlock oldBlock = mCachedXmlBlocks[pos]; 2075 if (oldBlock != null) { 2076 oldBlock.close(); 2077 } 2078 mCachedXmlBlockIds[pos] = id; 2079 mCachedXmlBlocks[pos] = block; 2080 //System.out.println("**** CACHING NEW XML BLOCK! id=" 2081 // + id + ", index=" + pos); 2082 return block.newParser(); 2083 } 2084 } 2085 } catch (Exception e) { 2086 NotFoundException rnf = new NotFoundException( 2087 "File " + file + " from xml type " + type + " resource ID #0x" 2088 + Integer.toHexString(id)); 2089 rnf.initCause(e); 2090 throw rnf; 2091 } 2092 } 2093 2094 throw new NotFoundException( 2095 "File " + file + " from xml type " + type + " resource ID #0x" 2096 + Integer.toHexString(id)); 2097 } 2098 2099 /** 2100 * Returns the display adjusted for the Resources' metrics. 2101 * @hide 2102 */ 2103 public Display getDefaultDisplay(Display defaultDisplay) { 2104 if (mDefaultDisplay == null) { 2105 if (!mCompatibilityInfo.isScalingRequired() && mCompatibilityInfo.supportsScreen()) { 2106 // the app supports the display. just use the default one. 2107 mDefaultDisplay = defaultDisplay; 2108 } else { 2109 // display needs adjustment. 2110 mDefaultDisplay = Display.createMetricsBasedDisplay( 2111 defaultDisplay.getDisplayId(), mMetrics); 2112 } 2113 } 2114 return mDefaultDisplay; 2115 } 2116 2117 private TypedArray getCachedStyledAttributes(int len) { 2118 synchronized (mTmpValue) { 2119 TypedArray attrs = mCachedStyledAttributes; 2120 if (attrs != null) { 2121 mCachedStyledAttributes = null; 2122 2123 attrs.mLength = len; 2124 int fullLen = len * AssetManager.STYLE_NUM_ENTRIES; 2125 if (attrs.mData.length >= fullLen) { 2126 return attrs; 2127 } 2128 attrs.mData = new int[fullLen]; 2129 attrs.mIndices = new int[1+len]; 2130 return attrs; 2131 } 2132 return new TypedArray(this, 2133 new int[len*AssetManager.STYLE_NUM_ENTRIES], 2134 new int[1+len], len); 2135 } 2136 } 2137 2138 private Resources() { 2139 mAssets = AssetManager.getSystem(); 2140 // NOTE: Intentionally leaving this uninitialized (all values set 2141 // to zero), so that anyone who tries to do something that requires 2142 // metrics will get a very wrong value. 2143 mConfiguration.setToDefaults(); 2144 mMetrics.setToDefaults(); 2145 updateConfiguration(null, null); 2146 mAssets.ensureStringBlocks(); 2147 mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO; 2148 } 2149} 2150