Parcel.java revision ac5a0828c14eea59f2ffda85432ad1977d3e1ce0
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.os; 18 19import android.text.TextUtils; 20import android.util.ArrayMap; 21import android.util.Log; 22import android.util.SparseArray; 23import android.util.SparseBooleanArray; 24 25import java.io.ByteArrayInputStream; 26import java.io.ByteArrayOutputStream; 27import java.io.FileDescriptor; 28import java.io.FileNotFoundException; 29import java.io.IOException; 30import java.io.ObjectInputStream; 31import java.io.ObjectOutputStream; 32import java.io.Serializable; 33import java.lang.reflect.Field; 34import java.util.ArrayList; 35import java.util.Arrays; 36import java.util.HashMap; 37import java.util.List; 38import java.util.Map; 39import java.util.Set; 40 41/** 42 * Container for a message (data and object references) that can 43 * be sent through an IBinder. A Parcel can contain both flattened data 44 * that will be unflattened on the other side of the IPC (using the various 45 * methods here for writing specific types, or the general 46 * {@link Parcelable} interface), and references to live {@link IBinder} 47 * objects that will result in the other side receiving a proxy IBinder 48 * connected with the original IBinder in the Parcel. 49 * 50 * <p class="note">Parcel is <strong>not</strong> a general-purpose 51 * serialization mechanism. This class (and the corresponding 52 * {@link Parcelable} API for placing arbitrary objects into a Parcel) is 53 * designed as a high-performance IPC transport. As such, it is not 54 * appropriate to place any Parcel data in to persistent storage: changes 55 * in the underlying implementation of any of the data in the Parcel can 56 * render older data unreadable.</p> 57 * 58 * <p>The bulk of the Parcel API revolves around reading and writing data 59 * of various types. There are six major classes of such functions available.</p> 60 * 61 * <h3>Primitives</h3> 62 * 63 * <p>The most basic data functions are for writing and reading primitive 64 * data types: {@link #writeByte}, {@link #readByte}, {@link #writeDouble}, 65 * {@link #readDouble}, {@link #writeFloat}, {@link #readFloat}, {@link #writeInt}, 66 * {@link #readInt}, {@link #writeLong}, {@link #readLong}, 67 * {@link #writeString}, {@link #readString}. Most other 68 * data operations are built on top of these. The given data is written and 69 * read using the endianess of the host CPU.</p> 70 * 71 * <h3>Primitive Arrays</h3> 72 * 73 * <p>There are a variety of methods for reading and writing raw arrays 74 * of primitive objects, which generally result in writing a 4-byte length 75 * followed by the primitive data items. The methods for reading can either 76 * read the data into an existing array, or create and return a new array. 77 * These available types are:</p> 78 * 79 * <ul> 80 * <li> {@link #writeBooleanArray(boolean[])}, 81 * {@link #readBooleanArray(boolean[])}, {@link #createBooleanArray()} 82 * <li> {@link #writeByteArray(byte[])}, 83 * {@link #writeByteArray(byte[], int, int)}, {@link #readByteArray(byte[])}, 84 * {@link #createByteArray()} 85 * <li> {@link #writeCharArray(char[])}, {@link #readCharArray(char[])}, 86 * {@link #createCharArray()} 87 * <li> {@link #writeDoubleArray(double[])}, {@link #readDoubleArray(double[])}, 88 * {@link #createDoubleArray()} 89 * <li> {@link #writeFloatArray(float[])}, {@link #readFloatArray(float[])}, 90 * {@link #createFloatArray()} 91 * <li> {@link #writeIntArray(int[])}, {@link #readIntArray(int[])}, 92 * {@link #createIntArray()} 93 * <li> {@link #writeLongArray(long[])}, {@link #readLongArray(long[])}, 94 * {@link #createLongArray()} 95 * <li> {@link #writeStringArray(String[])}, {@link #readStringArray(String[])}, 96 * {@link #createStringArray()}. 97 * <li> {@link #writeSparseBooleanArray(SparseBooleanArray)}, 98 * {@link #readSparseBooleanArray()}. 99 * </ul> 100 * 101 * <h3>Parcelables</h3> 102 * 103 * <p>The {@link Parcelable} protocol provides an extremely efficient (but 104 * low-level) protocol for objects to write and read themselves from Parcels. 105 * You can use the direct methods {@link #writeParcelable(Parcelable, int)} 106 * and {@link #readParcelable(ClassLoader)} or 107 * {@link #writeParcelableArray} and 108 * {@link #readParcelableArray(ClassLoader)} to write or read. These 109 * methods write both the class type and its data to the Parcel, allowing 110 * that class to be reconstructed from the appropriate class loader when 111 * later reading.</p> 112 * 113 * <p>There are also some methods that provide a more efficient way to work 114 * with Parcelables: {@link #writeTypedArray}, 115 * {@link #writeTypedList(List)}, 116 * {@link #readTypedArray} and {@link #readTypedList}. These methods 117 * do not write the class information of the original object: instead, the 118 * caller of the read function must know what type to expect and pass in the 119 * appropriate {@link Parcelable.Creator Parcelable.Creator} instead to 120 * properly construct the new object and read its data. (To more efficient 121 * write and read a single Parceable object, you can directly call 122 * {@link Parcelable#writeToParcel Parcelable.writeToParcel} and 123 * {@link Parcelable.Creator#createFromParcel Parcelable.Creator.createFromParcel} 124 * yourself.)</p> 125 * 126 * <h3>Bundles</h3> 127 * 128 * <p>A special type-safe container, called {@link Bundle}, is available 129 * for key/value maps of heterogeneous values. This has many optimizations 130 * for improved performance when reading and writing data, and its type-safe 131 * API avoids difficult to debug type errors when finally marshalling the 132 * data contents into a Parcel. The methods to use are 133 * {@link #writeBundle(Bundle)}, {@link #readBundle()}, and 134 * {@link #readBundle(ClassLoader)}. 135 * 136 * <h3>Active Objects</h3> 137 * 138 * <p>An unusual feature of Parcel is the ability to read and write active 139 * objects. For these objects the actual contents of the object is not 140 * written, rather a special token referencing the object is written. When 141 * reading the object back from the Parcel, you do not get a new instance of 142 * the object, but rather a handle that operates on the exact same object that 143 * was originally written. There are two forms of active objects available.</p> 144 * 145 * <p>{@link Binder} objects are a core facility of Android's general cross-process 146 * communication system. The {@link IBinder} interface describes an abstract 147 * protocol with a Binder object. Any such interface can be written in to 148 * a Parcel, and upon reading you will receive either the original object 149 * implementing that interface or a special proxy implementation 150 * that communicates calls back to the original object. The methods to use are 151 * {@link #writeStrongBinder(IBinder)}, 152 * {@link #writeStrongInterface(IInterface)}, {@link #readStrongBinder()}, 153 * {@link #writeBinderArray(IBinder[])}, {@link #readBinderArray(IBinder[])}, 154 * {@link #createBinderArray()}, 155 * {@link #writeBinderList(List)}, {@link #readBinderList(List)}, 156 * {@link #createBinderArrayList()}.</p> 157 * 158 * <p>FileDescriptor objects, representing raw Linux file descriptor identifiers, 159 * can be written and {@link ParcelFileDescriptor} objects returned to operate 160 * on the original file descriptor. The returned file descriptor is a dup 161 * of the original file descriptor: the object and fd is different, but 162 * operating on the same underlying file stream, with the same position, etc. 163 * The methods to use are {@link #writeFileDescriptor(FileDescriptor)}, 164 * {@link #readFileDescriptor()}. 165 * 166 * <h3>Untyped Containers</h3> 167 * 168 * <p>A final class of methods are for writing and reading standard Java 169 * containers of arbitrary types. These all revolve around the 170 * {@link #writeValue(Object)} and {@link #readValue(ClassLoader)} methods 171 * which define the types of objects allowed. The container methods are 172 * {@link #writeArray(Object[])}, {@link #readArray(ClassLoader)}, 173 * {@link #writeList(List)}, {@link #readList(List, ClassLoader)}, 174 * {@link #readArrayList(ClassLoader)}, 175 * {@link #writeMap(Map)}, {@link #readMap(Map, ClassLoader)}, 176 * {@link #writeSparseArray(SparseArray)}, 177 * {@link #readSparseArray(ClassLoader)}. 178 */ 179public final class Parcel { 180 private static final boolean DEBUG_RECYCLE = false; 181 private static final boolean DEBUG_ARRAY_MAP = false; 182 private static final String TAG = "Parcel"; 183 184 @SuppressWarnings({"UnusedDeclaration"}) 185 private long mNativePtr; // used by native code 186 187 /** 188 * Flag indicating if {@link #mNativePtr} was allocated by this object, 189 * indicating that we're responsible for its lifecycle. 190 */ 191 private boolean mOwnsNativeParcelObject; 192 193 private RuntimeException mStack; 194 195 private static final int POOL_SIZE = 6; 196 private static final Parcel[] sOwnedPool = new Parcel[POOL_SIZE]; 197 private static final Parcel[] sHolderPool = new Parcel[POOL_SIZE]; 198 199 private static final int VAL_NULL = -1; 200 private static final int VAL_STRING = 0; 201 private static final int VAL_INTEGER = 1; 202 private static final int VAL_MAP = 2; 203 private static final int VAL_BUNDLE = 3; 204 private static final int VAL_PARCELABLE = 4; 205 private static final int VAL_SHORT = 5; 206 private static final int VAL_LONG = 6; 207 private static final int VAL_FLOAT = 7; 208 private static final int VAL_DOUBLE = 8; 209 private static final int VAL_BOOLEAN = 9; 210 private static final int VAL_CHARSEQUENCE = 10; 211 private static final int VAL_LIST = 11; 212 private static final int VAL_SPARSEARRAY = 12; 213 private static final int VAL_BYTEARRAY = 13; 214 private static final int VAL_STRINGARRAY = 14; 215 private static final int VAL_IBINDER = 15; 216 private static final int VAL_PARCELABLEARRAY = 16; 217 private static final int VAL_OBJECTARRAY = 17; 218 private static final int VAL_INTARRAY = 18; 219 private static final int VAL_LONGARRAY = 19; 220 private static final int VAL_BYTE = 20; 221 private static final int VAL_SERIALIZABLE = 21; 222 private static final int VAL_SPARSEBOOLEANARRAY = 22; 223 private static final int VAL_BOOLEANARRAY = 23; 224 private static final int VAL_CHARSEQUENCEARRAY = 24; 225 226 // The initial int32 in a Binder call's reply Parcel header: 227 private static final int EX_SECURITY = -1; 228 private static final int EX_BAD_PARCELABLE = -2; 229 private static final int EX_ILLEGAL_ARGUMENT = -3; 230 private static final int EX_NULL_POINTER = -4; 231 private static final int EX_ILLEGAL_STATE = -5; 232 private static final int EX_NETWORK_MAIN_THREAD = -6; 233 private static final int EX_HAS_REPLY_HEADER = -128; // special; see below 234 235 private static native int nativeDataSize(long nativePtr); 236 private static native int nativeDataAvail(long nativePtr); 237 private static native int nativeDataPosition(long nativePtr); 238 private static native int nativeDataCapacity(long nativePtr); 239 private static native void nativeSetDataSize(long nativePtr, int size); 240 private static native void nativeSetDataPosition(long nativePtr, int pos); 241 private static native void nativeSetDataCapacity(long nativePtr, int size); 242 243 private static native boolean nativePushAllowFds(long nativePtr, boolean allowFds); 244 private static native void nativeRestoreAllowFds(long nativePtr, boolean lastValue); 245 246 private static native void nativeWriteByteArray(long nativePtr, byte[] b, int offset, int len); 247 private static native void nativeWriteInt(long nativePtr, int val); 248 private static native void nativeWriteLong(long nativePtr, long val); 249 private static native void nativeWriteFloat(long nativePtr, float val); 250 private static native void nativeWriteDouble(long nativePtr, double val); 251 private static native void nativeWriteString(long nativePtr, String val); 252 private static native void nativeWriteStrongBinder(long nativePtr, IBinder val); 253 private static native void nativeWriteFileDescriptor(long nativePtr, FileDescriptor val); 254 255 private static native byte[] nativeCreateByteArray(long nativePtr); 256 private static native int nativeReadInt(long nativePtr); 257 private static native long nativeReadLong(long nativePtr); 258 private static native float nativeReadFloat(long nativePtr); 259 private static native double nativeReadDouble(long nativePtr); 260 private static native String nativeReadString(long nativePtr); 261 private static native IBinder nativeReadStrongBinder(long nativePtr); 262 private static native FileDescriptor nativeReadFileDescriptor(long nativePtr); 263 264 private static native long nativeCreate(); 265 private static native void nativeFreeBuffer(long nativePtr); 266 private static native void nativeDestroy(long nativePtr); 267 268 private static native byte[] nativeMarshall(long nativePtr); 269 private static native void nativeUnmarshall( 270 long nativePtr, byte[] data, int offest, int length); 271 private static native void nativeAppendFrom( 272 long thisNativePtr, long otherNativePtr, int offset, int length); 273 private static native boolean nativeHasFileDescriptors(long nativePtr); 274 private static native void nativeWriteInterfaceToken(long nativePtr, String interfaceName); 275 private static native void nativeEnforceInterface(long nativePtr, String interfaceName); 276 277 public final static Parcelable.Creator<String> STRING_CREATOR 278 = new Parcelable.Creator<String>() { 279 public String createFromParcel(Parcel source) { 280 return source.readString(); 281 } 282 public String[] newArray(int size) { 283 return new String[size]; 284 } 285 }; 286 287 /** 288 * Retrieve a new Parcel object from the pool. 289 */ 290 public static Parcel obtain() { 291 final Parcel[] pool = sOwnedPool; 292 synchronized (pool) { 293 Parcel p; 294 for (int i=0; i<POOL_SIZE; i++) { 295 p = pool[i]; 296 if (p != null) { 297 pool[i] = null; 298 if (DEBUG_RECYCLE) { 299 p.mStack = new RuntimeException(); 300 } 301 return p; 302 } 303 } 304 } 305 return new Parcel(0); 306 } 307 308 /** 309 * Put a Parcel object back into the pool. You must not touch 310 * the object after this call. 311 */ 312 public final void recycle() { 313 if (DEBUG_RECYCLE) mStack = null; 314 freeBuffer(); 315 316 final Parcel[] pool; 317 if (mOwnsNativeParcelObject) { 318 pool = sOwnedPool; 319 } else { 320 mNativePtr = 0; 321 pool = sHolderPool; 322 } 323 324 synchronized (pool) { 325 for (int i=0; i<POOL_SIZE; i++) { 326 if (pool[i] == null) { 327 pool[i] = this; 328 return; 329 } 330 } 331 } 332 } 333 334 /** 335 * Returns the total amount of data contained in the parcel. 336 */ 337 public final int dataSize() { 338 return nativeDataSize(mNativePtr); 339 } 340 341 /** 342 * Returns the amount of data remaining to be read from the 343 * parcel. That is, {@link #dataSize}-{@link #dataPosition}. 344 */ 345 public final int dataAvail() { 346 return nativeDataAvail(mNativePtr); 347 } 348 349 /** 350 * Returns the current position in the parcel data. Never 351 * more than {@link #dataSize}. 352 */ 353 public final int dataPosition() { 354 return nativeDataPosition(mNativePtr); 355 } 356 357 /** 358 * Returns the total amount of space in the parcel. This is always 359 * >= {@link #dataSize}. The difference between it and dataSize() is the 360 * amount of room left until the parcel needs to re-allocate its 361 * data buffer. 362 */ 363 public final int dataCapacity() { 364 return nativeDataCapacity(mNativePtr); 365 } 366 367 /** 368 * Change the amount of data in the parcel. Can be either smaller or 369 * larger than the current size. If larger than the current capacity, 370 * more memory will be allocated. 371 * 372 * @param size The new number of bytes in the Parcel. 373 */ 374 public final void setDataSize(int size) { 375 nativeSetDataSize(mNativePtr, size); 376 } 377 378 /** 379 * Move the current read/write position in the parcel. 380 * @param pos New offset in the parcel; must be between 0 and 381 * {@link #dataSize}. 382 */ 383 public final void setDataPosition(int pos) { 384 nativeSetDataPosition(mNativePtr, pos); 385 } 386 387 /** 388 * Change the capacity (current available space) of the parcel. 389 * 390 * @param size The new capacity of the parcel, in bytes. Can not be 391 * less than {@link #dataSize} -- that is, you can not drop existing data 392 * with this method. 393 */ 394 public final void setDataCapacity(int size) { 395 nativeSetDataCapacity(mNativePtr, size); 396 } 397 398 /** @hide */ 399 public final boolean pushAllowFds(boolean allowFds) { 400 return nativePushAllowFds(mNativePtr, allowFds); 401 } 402 403 /** @hide */ 404 public final void restoreAllowFds(boolean lastValue) { 405 nativeRestoreAllowFds(mNativePtr, lastValue); 406 } 407 408 /** 409 * Returns the raw bytes of the parcel. 410 * 411 * <p class="note">The data you retrieve here <strong>must not</strong> 412 * be placed in any kind of persistent storage (on local disk, across 413 * a network, etc). For that, you should use standard serialization 414 * or another kind of general serialization mechanism. The Parcel 415 * marshalled representation is highly optimized for local IPC, and as 416 * such does not attempt to maintain compatibility with data created 417 * in different versions of the platform. 418 */ 419 public final byte[] marshall() { 420 return nativeMarshall(mNativePtr); 421 } 422 423 /** 424 * Set the bytes in data to be the raw bytes of this Parcel. 425 */ 426 public final void unmarshall(byte[] data, int offest, int length) { 427 nativeUnmarshall(mNativePtr, data, offest, length); 428 } 429 430 public final void appendFrom(Parcel parcel, int offset, int length) { 431 nativeAppendFrom(mNativePtr, parcel.mNativePtr, offset, length); 432 } 433 434 /** 435 * Report whether the parcel contains any marshalled file descriptors. 436 */ 437 public final boolean hasFileDescriptors() { 438 return nativeHasFileDescriptors(mNativePtr); 439 } 440 441 /** 442 * Store or read an IBinder interface token in the parcel at the current 443 * {@link #dataPosition}. This is used to validate that the marshalled 444 * transaction is intended for the target interface. 445 */ 446 public final void writeInterfaceToken(String interfaceName) { 447 nativeWriteInterfaceToken(mNativePtr, interfaceName); 448 } 449 450 public final void enforceInterface(String interfaceName) { 451 nativeEnforceInterface(mNativePtr, interfaceName); 452 } 453 454 /** 455 * Write a byte array into the parcel at the current {@link #dataPosition}, 456 * growing {@link #dataCapacity} if needed. 457 * @param b Bytes to place into the parcel. 458 */ 459 public final void writeByteArray(byte[] b) { 460 writeByteArray(b, 0, (b != null) ? b.length : 0); 461 } 462 463 /** 464 * Write a byte array into the parcel at the current {@link #dataPosition}, 465 * growing {@link #dataCapacity} if needed. 466 * @param b Bytes to place into the parcel. 467 * @param offset Index of first byte to be written. 468 * @param len Number of bytes to write. 469 */ 470 public final void writeByteArray(byte[] b, int offset, int len) { 471 if (b == null) { 472 writeInt(-1); 473 return; 474 } 475 Arrays.checkOffsetAndCount(b.length, offset, len); 476 nativeWriteByteArray(mNativePtr, b, offset, len); 477 } 478 479 /** 480 * Write an integer value into the parcel at the current dataPosition(), 481 * growing dataCapacity() if needed. 482 */ 483 public final void writeInt(int val) { 484 nativeWriteInt(mNativePtr, val); 485 } 486 487 /** 488 * Write a long integer value into the parcel at the current dataPosition(), 489 * growing dataCapacity() if needed. 490 */ 491 public final void writeLong(long val) { 492 nativeWriteLong(mNativePtr, val); 493 } 494 495 /** 496 * Write a floating point value into the parcel at the current 497 * dataPosition(), growing dataCapacity() if needed. 498 */ 499 public final void writeFloat(float val) { 500 nativeWriteFloat(mNativePtr, val); 501 } 502 503 /** 504 * Write a double precision floating point value into the parcel at the 505 * current dataPosition(), growing dataCapacity() if needed. 506 */ 507 public final void writeDouble(double val) { 508 nativeWriteDouble(mNativePtr, val); 509 } 510 511 /** 512 * Write a string value into the parcel at the current dataPosition(), 513 * growing dataCapacity() if needed. 514 */ 515 public final void writeString(String val) { 516 nativeWriteString(mNativePtr, val); 517 } 518 519 /** 520 * Write a CharSequence value into the parcel at the current dataPosition(), 521 * growing dataCapacity() if needed. 522 * @hide 523 */ 524 public final void writeCharSequence(CharSequence val) { 525 TextUtils.writeToParcel(val, this, 0); 526 } 527 528 /** 529 * Write an object into the parcel at the current dataPosition(), 530 * growing dataCapacity() if needed. 531 */ 532 public final void writeStrongBinder(IBinder val) { 533 nativeWriteStrongBinder(mNativePtr, val); 534 } 535 536 /** 537 * Write an object into the parcel at the current dataPosition(), 538 * growing dataCapacity() if needed. 539 */ 540 public final void writeStrongInterface(IInterface val) { 541 writeStrongBinder(val == null ? null : val.asBinder()); 542 } 543 544 /** 545 * Write a FileDescriptor into the parcel at the current dataPosition(), 546 * growing dataCapacity() if needed. 547 * 548 * <p class="caution">The file descriptor will not be closed, which may 549 * result in file descriptor leaks when objects are returned from Binder 550 * calls. Use {@link ParcelFileDescriptor#writeToParcel} instead, which 551 * accepts contextual flags and will close the original file descriptor 552 * if {@link Parcelable#PARCELABLE_WRITE_RETURN_VALUE} is set.</p> 553 */ 554 public final void writeFileDescriptor(FileDescriptor val) { 555 nativeWriteFileDescriptor(mNativePtr, val); 556 } 557 558 /** 559 * Write a byte value into the parcel at the current dataPosition(), 560 * growing dataCapacity() if needed. 561 */ 562 public final void writeByte(byte val) { 563 writeInt(val); 564 } 565 566 /** 567 * Please use {@link #writeBundle} instead. Flattens a Map into the parcel 568 * at the current dataPosition(), 569 * growing dataCapacity() if needed. The Map keys must be String objects. 570 * The Map values are written using {@link #writeValue} and must follow 571 * the specification there. 572 * 573 * <p>It is strongly recommended to use {@link #writeBundle} instead of 574 * this method, since the Bundle class provides a type-safe API that 575 * allows you to avoid mysterious type errors at the point of marshalling. 576 */ 577 public final void writeMap(Map val) { 578 writeMapInternal((Map<String, Object>) val); 579 } 580 581 /** 582 * Flatten a Map into the parcel at the current dataPosition(), 583 * growing dataCapacity() if needed. The Map keys must be String objects. 584 */ 585 /* package */ void writeMapInternal(Map<String,Object> val) { 586 if (val == null) { 587 writeInt(-1); 588 return; 589 } 590 Set<Map.Entry<String,Object>> entries = val.entrySet(); 591 writeInt(entries.size()); 592 for (Map.Entry<String,Object> e : entries) { 593 writeValue(e.getKey()); 594 writeValue(e.getValue()); 595 } 596 } 597 598 /** 599 * Flatten an ArrayMap into the parcel at the current dataPosition(), 600 * growing dataCapacity() if needed. The Map keys must be String objects. 601 */ 602 /* package */ void writeArrayMapInternal(ArrayMap<String,Object> val) { 603 if (val == null) { 604 writeInt(-1); 605 return; 606 } 607 final int N = val.size(); 608 writeInt(N); 609 if (DEBUG_ARRAY_MAP) { 610 RuntimeException here = new RuntimeException("here"); 611 here.fillInStackTrace(); 612 Log.d(TAG, "Writing " + N + " ArrayMap entries", here); 613 } 614 int startPos; 615 for (int i=0; i<N; i++) { 616 if (DEBUG_ARRAY_MAP) startPos = dataPosition(); 617 writeValue(val.keyAt(i)); 618 writeValue(val.valueAt(i)); 619 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Write #" + i + " " 620 + (dataPosition()-startPos) + " bytes: key=0x" 621 + Integer.toHexString(val.keyAt(i) != null ? val.keyAt(i).hashCode() : 0) 622 + " " + val.keyAt(i)); 623 } 624 } 625 626 /** 627 * Flatten a Bundle into the parcel at the current dataPosition(), 628 * growing dataCapacity() if needed. 629 */ 630 public final void writeBundle(Bundle val) { 631 if (val == null) { 632 writeInt(-1); 633 return; 634 } 635 636 val.writeToParcel(this, 0); 637 } 638 639 /** 640 * Flatten a List into the parcel at the current dataPosition(), growing 641 * dataCapacity() if needed. The List values are written using 642 * {@link #writeValue} and must follow the specification there. 643 */ 644 public final void writeList(List val) { 645 if (val == null) { 646 writeInt(-1); 647 return; 648 } 649 int N = val.size(); 650 int i=0; 651 writeInt(N); 652 while (i < N) { 653 writeValue(val.get(i)); 654 i++; 655 } 656 } 657 658 /** 659 * Flatten an Object array into the parcel at the current dataPosition(), 660 * growing dataCapacity() if needed. The array values are written using 661 * {@link #writeValue} and must follow the specification there. 662 */ 663 public final void writeArray(Object[] val) { 664 if (val == null) { 665 writeInt(-1); 666 return; 667 } 668 int N = val.length; 669 int i=0; 670 writeInt(N); 671 while (i < N) { 672 writeValue(val[i]); 673 i++; 674 } 675 } 676 677 /** 678 * Flatten a generic SparseArray into the parcel at the current 679 * dataPosition(), growing dataCapacity() if needed. The SparseArray 680 * values are written using {@link #writeValue} and must follow the 681 * specification there. 682 */ 683 public final void writeSparseArray(SparseArray<Object> val) { 684 if (val == null) { 685 writeInt(-1); 686 return; 687 } 688 int N = val.size(); 689 writeInt(N); 690 int i=0; 691 while (i < N) { 692 writeInt(val.keyAt(i)); 693 writeValue(val.valueAt(i)); 694 i++; 695 } 696 } 697 698 public final void writeSparseBooleanArray(SparseBooleanArray val) { 699 if (val == null) { 700 writeInt(-1); 701 return; 702 } 703 int N = val.size(); 704 writeInt(N); 705 int i=0; 706 while (i < N) { 707 writeInt(val.keyAt(i)); 708 writeByte((byte)(val.valueAt(i) ? 1 : 0)); 709 i++; 710 } 711 } 712 713 public final void writeBooleanArray(boolean[] val) { 714 if (val != null) { 715 int N = val.length; 716 writeInt(N); 717 for (int i=0; i<N; i++) { 718 writeInt(val[i] ? 1 : 0); 719 } 720 } else { 721 writeInt(-1); 722 } 723 } 724 725 public final boolean[] createBooleanArray() { 726 int N = readInt(); 727 // >>2 as a fast divide-by-4 works in the create*Array() functions 728 // because dataAvail() will never return a negative number. 4 is 729 // the size of a stored boolean in the stream. 730 if (N >= 0 && N <= (dataAvail() >> 2)) { 731 boolean[] val = new boolean[N]; 732 for (int i=0; i<N; i++) { 733 val[i] = readInt() != 0; 734 } 735 return val; 736 } else { 737 return null; 738 } 739 } 740 741 public final void readBooleanArray(boolean[] val) { 742 int N = readInt(); 743 if (N == val.length) { 744 for (int i=0; i<N; i++) { 745 val[i] = readInt() != 0; 746 } 747 } else { 748 throw new RuntimeException("bad array lengths"); 749 } 750 } 751 752 public final void writeCharArray(char[] val) { 753 if (val != null) { 754 int N = val.length; 755 writeInt(N); 756 for (int i=0; i<N; i++) { 757 writeInt((int)val[i]); 758 } 759 } else { 760 writeInt(-1); 761 } 762 } 763 764 public final char[] createCharArray() { 765 int N = readInt(); 766 if (N >= 0 && N <= (dataAvail() >> 2)) { 767 char[] val = new char[N]; 768 for (int i=0; i<N; i++) { 769 val[i] = (char)readInt(); 770 } 771 return val; 772 } else { 773 return null; 774 } 775 } 776 777 public final void readCharArray(char[] val) { 778 int N = readInt(); 779 if (N == val.length) { 780 for (int i=0; i<N; i++) { 781 val[i] = (char)readInt(); 782 } 783 } else { 784 throw new RuntimeException("bad array lengths"); 785 } 786 } 787 788 public final void writeIntArray(int[] val) { 789 if (val != null) { 790 int N = val.length; 791 writeInt(N); 792 for (int i=0; i<N; i++) { 793 writeInt(val[i]); 794 } 795 } else { 796 writeInt(-1); 797 } 798 } 799 800 public final int[] createIntArray() { 801 int N = readInt(); 802 if (N >= 0 && N <= (dataAvail() >> 2)) { 803 int[] val = new int[N]; 804 for (int i=0; i<N; i++) { 805 val[i] = readInt(); 806 } 807 return val; 808 } else { 809 return null; 810 } 811 } 812 813 public final void readIntArray(int[] val) { 814 int N = readInt(); 815 if (N == val.length) { 816 for (int i=0; i<N; i++) { 817 val[i] = readInt(); 818 } 819 } else { 820 throw new RuntimeException("bad array lengths"); 821 } 822 } 823 824 public final void writeLongArray(long[] val) { 825 if (val != null) { 826 int N = val.length; 827 writeInt(N); 828 for (int i=0; i<N; i++) { 829 writeLong(val[i]); 830 } 831 } else { 832 writeInt(-1); 833 } 834 } 835 836 public final long[] createLongArray() { 837 int N = readInt(); 838 // >>3 because stored longs are 64 bits 839 if (N >= 0 && N <= (dataAvail() >> 3)) { 840 long[] val = new long[N]; 841 for (int i=0; i<N; i++) { 842 val[i] = readLong(); 843 } 844 return val; 845 } else { 846 return null; 847 } 848 } 849 850 public final void readLongArray(long[] val) { 851 int N = readInt(); 852 if (N == val.length) { 853 for (int i=0; i<N; i++) { 854 val[i] = readLong(); 855 } 856 } else { 857 throw new RuntimeException("bad array lengths"); 858 } 859 } 860 861 public final void writeFloatArray(float[] val) { 862 if (val != null) { 863 int N = val.length; 864 writeInt(N); 865 for (int i=0; i<N; i++) { 866 writeFloat(val[i]); 867 } 868 } else { 869 writeInt(-1); 870 } 871 } 872 873 public final float[] createFloatArray() { 874 int N = readInt(); 875 // >>2 because stored floats are 4 bytes 876 if (N >= 0 && N <= (dataAvail() >> 2)) { 877 float[] val = new float[N]; 878 for (int i=0; i<N; i++) { 879 val[i] = readFloat(); 880 } 881 return val; 882 } else { 883 return null; 884 } 885 } 886 887 public final void readFloatArray(float[] val) { 888 int N = readInt(); 889 if (N == val.length) { 890 for (int i=0; i<N; i++) { 891 val[i] = readFloat(); 892 } 893 } else { 894 throw new RuntimeException("bad array lengths"); 895 } 896 } 897 898 public final void writeDoubleArray(double[] val) { 899 if (val != null) { 900 int N = val.length; 901 writeInt(N); 902 for (int i=0; i<N; i++) { 903 writeDouble(val[i]); 904 } 905 } else { 906 writeInt(-1); 907 } 908 } 909 910 public final double[] createDoubleArray() { 911 int N = readInt(); 912 // >>3 because stored doubles are 8 bytes 913 if (N >= 0 && N <= (dataAvail() >> 3)) { 914 double[] val = new double[N]; 915 for (int i=0; i<N; i++) { 916 val[i] = readDouble(); 917 } 918 return val; 919 } else { 920 return null; 921 } 922 } 923 924 public final void readDoubleArray(double[] val) { 925 int N = readInt(); 926 if (N == val.length) { 927 for (int i=0; i<N; i++) { 928 val[i] = readDouble(); 929 } 930 } else { 931 throw new RuntimeException("bad array lengths"); 932 } 933 } 934 935 public final void writeStringArray(String[] val) { 936 if (val != null) { 937 int N = val.length; 938 writeInt(N); 939 for (int i=0; i<N; i++) { 940 writeString(val[i]); 941 } 942 } else { 943 writeInt(-1); 944 } 945 } 946 947 public final String[] createStringArray() { 948 int N = readInt(); 949 if (N >= 0) { 950 String[] val = new String[N]; 951 for (int i=0; i<N; i++) { 952 val[i] = readString(); 953 } 954 return val; 955 } else { 956 return null; 957 } 958 } 959 960 public final void readStringArray(String[] val) { 961 int N = readInt(); 962 if (N == val.length) { 963 for (int i=0; i<N; i++) { 964 val[i] = readString(); 965 } 966 } else { 967 throw new RuntimeException("bad array lengths"); 968 } 969 } 970 971 public final void writeBinderArray(IBinder[] val) { 972 if (val != null) { 973 int N = val.length; 974 writeInt(N); 975 for (int i=0; i<N; i++) { 976 writeStrongBinder(val[i]); 977 } 978 } else { 979 writeInt(-1); 980 } 981 } 982 983 /** 984 * @hide 985 */ 986 public final void writeCharSequenceArray(CharSequence[] val) { 987 if (val != null) { 988 int N = val.length; 989 writeInt(N); 990 for (int i=0; i<N; i++) { 991 writeCharSequence(val[i]); 992 } 993 } else { 994 writeInt(-1); 995 } 996 } 997 998 public final IBinder[] createBinderArray() { 999 int N = readInt(); 1000 if (N >= 0) { 1001 IBinder[] val = new IBinder[N]; 1002 for (int i=0; i<N; i++) { 1003 val[i] = readStrongBinder(); 1004 } 1005 return val; 1006 } else { 1007 return null; 1008 } 1009 } 1010 1011 public final void readBinderArray(IBinder[] val) { 1012 int N = readInt(); 1013 if (N == val.length) { 1014 for (int i=0; i<N; i++) { 1015 val[i] = readStrongBinder(); 1016 } 1017 } else { 1018 throw new RuntimeException("bad array lengths"); 1019 } 1020 } 1021 1022 /** 1023 * Flatten a List containing a particular object type into the parcel, at 1024 * the current dataPosition() and growing dataCapacity() if needed. The 1025 * type of the objects in the list must be one that implements Parcelable. 1026 * Unlike the generic writeList() method, however, only the raw data of the 1027 * objects is written and not their type, so you must use the corresponding 1028 * readTypedList() to unmarshall them. 1029 * 1030 * @param val The list of objects to be written. 1031 * 1032 * @see #createTypedArrayList 1033 * @see #readTypedList 1034 * @see Parcelable 1035 */ 1036 public final <T extends Parcelable> void writeTypedList(List<T> val) { 1037 if (val == null) { 1038 writeInt(-1); 1039 return; 1040 } 1041 int N = val.size(); 1042 int i=0; 1043 writeInt(N); 1044 while (i < N) { 1045 T item = val.get(i); 1046 if (item != null) { 1047 writeInt(1); 1048 item.writeToParcel(this, 0); 1049 } else { 1050 writeInt(0); 1051 } 1052 i++; 1053 } 1054 } 1055 1056 /** 1057 * Flatten a List containing String objects into the parcel, at 1058 * the current dataPosition() and growing dataCapacity() if needed. They 1059 * can later be retrieved with {@link #createStringArrayList} or 1060 * {@link #readStringList}. 1061 * 1062 * @param val The list of strings to be written. 1063 * 1064 * @see #createStringArrayList 1065 * @see #readStringList 1066 */ 1067 public final void writeStringList(List<String> val) { 1068 if (val == null) { 1069 writeInt(-1); 1070 return; 1071 } 1072 int N = val.size(); 1073 int i=0; 1074 writeInt(N); 1075 while (i < N) { 1076 writeString(val.get(i)); 1077 i++; 1078 } 1079 } 1080 1081 /** 1082 * Flatten a List containing IBinder objects into the parcel, at 1083 * the current dataPosition() and growing dataCapacity() if needed. They 1084 * can later be retrieved with {@link #createBinderArrayList} or 1085 * {@link #readBinderList}. 1086 * 1087 * @param val The list of strings to be written. 1088 * 1089 * @see #createBinderArrayList 1090 * @see #readBinderList 1091 */ 1092 public final void writeBinderList(List<IBinder> val) { 1093 if (val == null) { 1094 writeInt(-1); 1095 return; 1096 } 1097 int N = val.size(); 1098 int i=0; 1099 writeInt(N); 1100 while (i < N) { 1101 writeStrongBinder(val.get(i)); 1102 i++; 1103 } 1104 } 1105 1106 /** 1107 * Flatten a heterogeneous array containing a particular object type into 1108 * the parcel, at 1109 * the current dataPosition() and growing dataCapacity() if needed. The 1110 * type of the objects in the array must be one that implements Parcelable. 1111 * Unlike the {@link #writeParcelableArray} method, however, only the 1112 * raw data of the objects is written and not their type, so you must use 1113 * {@link #readTypedArray} with the correct corresponding 1114 * {@link Parcelable.Creator} implementation to unmarshall them. 1115 * 1116 * @param val The array of objects to be written. 1117 * @param parcelableFlags Contextual flags as per 1118 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1119 * 1120 * @see #readTypedArray 1121 * @see #writeParcelableArray 1122 * @see Parcelable.Creator 1123 */ 1124 public final <T extends Parcelable> void writeTypedArray(T[] val, 1125 int parcelableFlags) { 1126 if (val != null) { 1127 int N = val.length; 1128 writeInt(N); 1129 for (int i=0; i<N; i++) { 1130 T item = val[i]; 1131 if (item != null) { 1132 writeInt(1); 1133 item.writeToParcel(this, parcelableFlags); 1134 } else { 1135 writeInt(0); 1136 } 1137 } 1138 } else { 1139 writeInt(-1); 1140 } 1141 } 1142 1143 /** 1144 * Flatten a generic object in to a parcel. The given Object value may 1145 * currently be one of the following types: 1146 * 1147 * <ul> 1148 * <li> null 1149 * <li> String 1150 * <li> Byte 1151 * <li> Short 1152 * <li> Integer 1153 * <li> Long 1154 * <li> Float 1155 * <li> Double 1156 * <li> Boolean 1157 * <li> String[] 1158 * <li> boolean[] 1159 * <li> byte[] 1160 * <li> int[] 1161 * <li> long[] 1162 * <li> Object[] (supporting objects of the same type defined here). 1163 * <li> {@link Bundle} 1164 * <li> Map (as supported by {@link #writeMap}). 1165 * <li> Any object that implements the {@link Parcelable} protocol. 1166 * <li> Parcelable[] 1167 * <li> CharSequence (as supported by {@link TextUtils#writeToParcel}). 1168 * <li> List (as supported by {@link #writeList}). 1169 * <li> {@link SparseArray} (as supported by {@link #writeSparseArray(SparseArray)}). 1170 * <li> {@link IBinder} 1171 * <li> Any object that implements Serializable (but see 1172 * {@link #writeSerializable} for caveats). Note that all of the 1173 * previous types have relatively efficient implementations for 1174 * writing to a Parcel; having to rely on the generic serialization 1175 * approach is much less efficient and should be avoided whenever 1176 * possible. 1177 * </ul> 1178 * 1179 * <p class="caution">{@link Parcelable} objects are written with 1180 * {@link Parcelable#writeToParcel} using contextual flags of 0. When 1181 * serializing objects containing {@link ParcelFileDescriptor}s, 1182 * this may result in file descriptor leaks when they are returned from 1183 * Binder calls (where {@link Parcelable#PARCELABLE_WRITE_RETURN_VALUE} 1184 * should be used).</p> 1185 */ 1186 public final void writeValue(Object v) { 1187 if (v == null) { 1188 writeInt(VAL_NULL); 1189 } else if (v instanceof String) { 1190 writeInt(VAL_STRING); 1191 writeString((String) v); 1192 } else if (v instanceof Integer) { 1193 writeInt(VAL_INTEGER); 1194 writeInt((Integer) v); 1195 } else if (v instanceof Map) { 1196 writeInt(VAL_MAP); 1197 writeMap((Map) v); 1198 } else if (v instanceof Bundle) { 1199 // Must be before Parcelable 1200 writeInt(VAL_BUNDLE); 1201 writeBundle((Bundle) v); 1202 } else if (v instanceof Parcelable) { 1203 writeInt(VAL_PARCELABLE); 1204 writeParcelable((Parcelable) v, 0); 1205 } else if (v instanceof Short) { 1206 writeInt(VAL_SHORT); 1207 writeInt(((Short) v).intValue()); 1208 } else if (v instanceof Long) { 1209 writeInt(VAL_LONG); 1210 writeLong((Long) v); 1211 } else if (v instanceof Float) { 1212 writeInt(VAL_FLOAT); 1213 writeFloat((Float) v); 1214 } else if (v instanceof Double) { 1215 writeInt(VAL_DOUBLE); 1216 writeDouble((Double) v); 1217 } else if (v instanceof Boolean) { 1218 writeInt(VAL_BOOLEAN); 1219 writeInt((Boolean) v ? 1 : 0); 1220 } else if (v instanceof CharSequence) { 1221 // Must be after String 1222 writeInt(VAL_CHARSEQUENCE); 1223 writeCharSequence((CharSequence) v); 1224 } else if (v instanceof List) { 1225 writeInt(VAL_LIST); 1226 writeList((List) v); 1227 } else if (v instanceof SparseArray) { 1228 writeInt(VAL_SPARSEARRAY); 1229 writeSparseArray((SparseArray) v); 1230 } else if (v instanceof boolean[]) { 1231 writeInt(VAL_BOOLEANARRAY); 1232 writeBooleanArray((boolean[]) v); 1233 } else if (v instanceof byte[]) { 1234 writeInt(VAL_BYTEARRAY); 1235 writeByteArray((byte[]) v); 1236 } else if (v instanceof String[]) { 1237 writeInt(VAL_STRINGARRAY); 1238 writeStringArray((String[]) v); 1239 } else if (v instanceof CharSequence[]) { 1240 // Must be after String[] and before Object[] 1241 writeInt(VAL_CHARSEQUENCEARRAY); 1242 writeCharSequenceArray((CharSequence[]) v); 1243 } else if (v instanceof IBinder) { 1244 writeInt(VAL_IBINDER); 1245 writeStrongBinder((IBinder) v); 1246 } else if (v instanceof Parcelable[]) { 1247 writeInt(VAL_PARCELABLEARRAY); 1248 writeParcelableArray((Parcelable[]) v, 0); 1249 } else if (v instanceof int[]) { 1250 writeInt(VAL_INTARRAY); 1251 writeIntArray((int[]) v); 1252 } else if (v instanceof long[]) { 1253 writeInt(VAL_LONGARRAY); 1254 writeLongArray((long[]) v); 1255 } else if (v instanceof Byte) { 1256 writeInt(VAL_BYTE); 1257 writeInt((Byte) v); 1258 } else { 1259 Class<?> clazz = v.getClass(); 1260 if (clazz.isArray() && clazz.getComponentType() == Object.class) { 1261 // Only pure Object[] are written here, Other arrays of non-primitive types are 1262 // handled by serialization as this does not record the component type. 1263 writeInt(VAL_OBJECTARRAY); 1264 writeArray((Object[]) v); 1265 } else if (v instanceof Serializable) { 1266 // Must be last 1267 writeInt(VAL_SERIALIZABLE); 1268 writeSerializable((Serializable) v); 1269 } else { 1270 throw new RuntimeException("Parcel: unable to marshal value " + v); 1271 } 1272 } 1273 } 1274 1275 /** 1276 * Flatten the name of the class of the Parcelable and its contents 1277 * into the parcel. 1278 * 1279 * @param p The Parcelable object to be written. 1280 * @param parcelableFlags Contextual flags as per 1281 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1282 */ 1283 public final void writeParcelable(Parcelable p, int parcelableFlags) { 1284 if (p == null) { 1285 writeString(null); 1286 return; 1287 } 1288 String name = p.getClass().getName(); 1289 writeString(name); 1290 p.writeToParcel(this, parcelableFlags); 1291 } 1292 1293 /** @hide */ 1294 public final void writeParcelableCreator(Parcelable p) { 1295 String name = p.getClass().getName(); 1296 writeString(name); 1297 } 1298 1299 /** 1300 * Write a generic serializable object in to a Parcel. It is strongly 1301 * recommended that this method be avoided, since the serialization 1302 * overhead is extremely large, and this approach will be much slower than 1303 * using the other approaches to writing data in to a Parcel. 1304 */ 1305 public final void writeSerializable(Serializable s) { 1306 if (s == null) { 1307 writeString(null); 1308 return; 1309 } 1310 String name = s.getClass().getName(); 1311 writeString(name); 1312 1313 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 1314 try { 1315 ObjectOutputStream oos = new ObjectOutputStream(baos); 1316 oos.writeObject(s); 1317 oos.close(); 1318 1319 writeByteArray(baos.toByteArray()); 1320 } catch (IOException ioe) { 1321 throw new RuntimeException("Parcelable encountered " + 1322 "IOException writing serializable object (name = " + name + 1323 ")", ioe); 1324 } 1325 } 1326 1327 /** 1328 * Special function for writing an exception result at the header of 1329 * a parcel, to be used when returning an exception from a transaction. 1330 * Note that this currently only supports a few exception types; any other 1331 * exception will be re-thrown by this function as a RuntimeException 1332 * (to be caught by the system's last-resort exception handling when 1333 * dispatching a transaction). 1334 * 1335 * <p>The supported exception types are: 1336 * <ul> 1337 * <li>{@link BadParcelableException} 1338 * <li>{@link IllegalArgumentException} 1339 * <li>{@link IllegalStateException} 1340 * <li>{@link NullPointerException} 1341 * <li>{@link SecurityException} 1342 * <li>{@link NetworkOnMainThreadException} 1343 * </ul> 1344 * 1345 * @param e The Exception to be written. 1346 * 1347 * @see #writeNoException 1348 * @see #readException 1349 */ 1350 public final void writeException(Exception e) { 1351 int code = 0; 1352 if (e instanceof SecurityException) { 1353 code = EX_SECURITY; 1354 } else if (e instanceof BadParcelableException) { 1355 code = EX_BAD_PARCELABLE; 1356 } else if (e instanceof IllegalArgumentException) { 1357 code = EX_ILLEGAL_ARGUMENT; 1358 } else if (e instanceof NullPointerException) { 1359 code = EX_NULL_POINTER; 1360 } else if (e instanceof IllegalStateException) { 1361 code = EX_ILLEGAL_STATE; 1362 } else if (e instanceof NetworkOnMainThreadException) { 1363 code = EX_NETWORK_MAIN_THREAD; 1364 } 1365 writeInt(code); 1366 StrictMode.clearGatheredViolations(); 1367 if (code == 0) { 1368 if (e instanceof RuntimeException) { 1369 throw (RuntimeException) e; 1370 } 1371 throw new RuntimeException(e); 1372 } 1373 writeString(e.getMessage()); 1374 } 1375 1376 /** 1377 * Special function for writing information at the front of the Parcel 1378 * indicating that no exception occurred. 1379 * 1380 * @see #writeException 1381 * @see #readException 1382 */ 1383 public final void writeNoException() { 1384 // Despite the name of this function ("write no exception"), 1385 // it should instead be thought of as "write the RPC response 1386 // header", but because this function name is written out by 1387 // the AIDL compiler, we're not going to rename it. 1388 // 1389 // The response header, in the non-exception case (see also 1390 // writeException above, also called by the AIDL compiler), is 1391 // either a 0 (the default case), or EX_HAS_REPLY_HEADER if 1392 // StrictMode has gathered up violations that have occurred 1393 // during a Binder call, in which case we write out the number 1394 // of violations and their details, serialized, before the 1395 // actual RPC respons data. The receiving end of this is 1396 // readException(), below. 1397 if (StrictMode.hasGatheredViolations()) { 1398 writeInt(EX_HAS_REPLY_HEADER); 1399 final int sizePosition = dataPosition(); 1400 writeInt(0); // total size of fat header, to be filled in later 1401 StrictMode.writeGatheredViolationsToParcel(this); 1402 final int payloadPosition = dataPosition(); 1403 setDataPosition(sizePosition); 1404 writeInt(payloadPosition - sizePosition); // header size 1405 setDataPosition(payloadPosition); 1406 } else { 1407 writeInt(0); 1408 } 1409 } 1410 1411 /** 1412 * Special function for reading an exception result from the header of 1413 * a parcel, to be used after receiving the result of a transaction. This 1414 * will throw the exception for you if it had been written to the Parcel, 1415 * otherwise return and let you read the normal result data from the Parcel. 1416 * 1417 * @see #writeException 1418 * @see #writeNoException 1419 */ 1420 public final void readException() { 1421 int code = readExceptionCode(); 1422 if (code != 0) { 1423 String msg = readString(); 1424 readException(code, msg); 1425 } 1426 } 1427 1428 /** 1429 * Parses the header of a Binder call's response Parcel and 1430 * returns the exception code. Deals with lite or fat headers. 1431 * In the common successful case, this header is generally zero. 1432 * In less common cases, it's a small negative number and will be 1433 * followed by an error string. 1434 * 1435 * This exists purely for android.database.DatabaseUtils and 1436 * insulating it from having to handle fat headers as returned by 1437 * e.g. StrictMode-induced RPC responses. 1438 * 1439 * @hide 1440 */ 1441 public final int readExceptionCode() { 1442 int code = readInt(); 1443 if (code == EX_HAS_REPLY_HEADER) { 1444 int headerSize = readInt(); 1445 if (headerSize == 0) { 1446 Log.e(TAG, "Unexpected zero-sized Parcel reply header."); 1447 } else { 1448 // Currently the only thing in the header is StrictMode stacks, 1449 // but discussions around event/RPC tracing suggest we might 1450 // put that here too. If so, switch on sub-header tags here. 1451 // But for now, just parse out the StrictMode stuff. 1452 StrictMode.readAndHandleBinderCallViolations(this); 1453 } 1454 // And fat response headers are currently only used when 1455 // there are no exceptions, so return no error: 1456 return 0; 1457 } 1458 return code; 1459 } 1460 1461 /** 1462 * Use this function for customized exception handling. 1463 * customized method call this method for all unknown case 1464 * @param code exception code 1465 * @param msg exception message 1466 */ 1467 public final void readException(int code, String msg) { 1468 switch (code) { 1469 case EX_SECURITY: 1470 throw new SecurityException(msg); 1471 case EX_BAD_PARCELABLE: 1472 throw new BadParcelableException(msg); 1473 case EX_ILLEGAL_ARGUMENT: 1474 throw new IllegalArgumentException(msg); 1475 case EX_NULL_POINTER: 1476 throw new NullPointerException(msg); 1477 case EX_ILLEGAL_STATE: 1478 throw new IllegalStateException(msg); 1479 case EX_NETWORK_MAIN_THREAD: 1480 throw new NetworkOnMainThreadException(); 1481 } 1482 throw new RuntimeException("Unknown exception code: " + code 1483 + " msg " + msg); 1484 } 1485 1486 /** 1487 * Read an integer value from the parcel at the current dataPosition(). 1488 */ 1489 public final int readInt() { 1490 return nativeReadInt(mNativePtr); 1491 } 1492 1493 /** 1494 * Read a long integer value from the parcel at the current dataPosition(). 1495 */ 1496 public final long readLong() { 1497 return nativeReadLong(mNativePtr); 1498 } 1499 1500 /** 1501 * Read a floating point value from the parcel at the current 1502 * dataPosition(). 1503 */ 1504 public final float readFloat() { 1505 return nativeReadFloat(mNativePtr); 1506 } 1507 1508 /** 1509 * Read a double precision floating point value from the parcel at the 1510 * current dataPosition(). 1511 */ 1512 public final double readDouble() { 1513 return nativeReadDouble(mNativePtr); 1514 } 1515 1516 /** 1517 * Read a string value from the parcel at the current dataPosition(). 1518 */ 1519 public final String readString() { 1520 return nativeReadString(mNativePtr); 1521 } 1522 1523 /** 1524 * Read a CharSequence value from the parcel at the current dataPosition(). 1525 * @hide 1526 */ 1527 public final CharSequence readCharSequence() { 1528 return TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(this); 1529 } 1530 1531 /** 1532 * Read an object from the parcel at the current dataPosition(). 1533 */ 1534 public final IBinder readStrongBinder() { 1535 return nativeReadStrongBinder(mNativePtr); 1536 } 1537 1538 /** 1539 * Read a FileDescriptor from the parcel at the current dataPosition(). 1540 */ 1541 public final ParcelFileDescriptor readFileDescriptor() { 1542 FileDescriptor fd = nativeReadFileDescriptor(mNativePtr); 1543 return fd != null ? new ParcelFileDescriptor(fd) : null; 1544 } 1545 1546 /** {@hide} */ 1547 public final FileDescriptor readRawFileDescriptor() { 1548 return nativeReadFileDescriptor(mNativePtr); 1549 } 1550 1551 /*package*/ static native FileDescriptor openFileDescriptor(String file, 1552 int mode) throws FileNotFoundException; 1553 /*package*/ static native FileDescriptor dupFileDescriptor(FileDescriptor orig) 1554 throws IOException; 1555 /*package*/ static native void closeFileDescriptor(FileDescriptor desc) 1556 throws IOException; 1557 /*package*/ static native void clearFileDescriptor(FileDescriptor desc); 1558 1559 /** 1560 * Read a byte value from the parcel at the current dataPosition(). 1561 */ 1562 public final byte readByte() { 1563 return (byte)(readInt() & 0xff); 1564 } 1565 1566 /** 1567 * Please use {@link #readBundle(ClassLoader)} instead (whose data must have 1568 * been written with {@link #writeBundle}. Read into an existing Map object 1569 * from the parcel at the current dataPosition(). 1570 */ 1571 public final void readMap(Map outVal, ClassLoader loader) { 1572 int N = readInt(); 1573 readMapInternal(outVal, N, loader); 1574 } 1575 1576 /** 1577 * Read into an existing List object from the parcel at the current 1578 * dataPosition(), using the given class loader to load any enclosed 1579 * Parcelables. If it is null, the default class loader is used. 1580 */ 1581 public final void readList(List outVal, ClassLoader loader) { 1582 int N = readInt(); 1583 readListInternal(outVal, N, loader); 1584 } 1585 1586 /** 1587 * Please use {@link #readBundle(ClassLoader)} instead (whose data must have 1588 * been written with {@link #writeBundle}. Read and return a new HashMap 1589 * object from the parcel at the current dataPosition(), using the given 1590 * class loader to load any enclosed Parcelables. Returns null if 1591 * the previously written map object was null. 1592 */ 1593 public final HashMap readHashMap(ClassLoader loader) 1594 { 1595 int N = readInt(); 1596 if (N < 0) { 1597 return null; 1598 } 1599 HashMap m = new HashMap(N); 1600 readMapInternal(m, N, loader); 1601 return m; 1602 } 1603 1604 /** 1605 * Read and return a new Bundle object from the parcel at the current 1606 * dataPosition(). Returns null if the previously written Bundle object was 1607 * null. 1608 */ 1609 public final Bundle readBundle() { 1610 return readBundle(null); 1611 } 1612 1613 /** 1614 * Read and return a new Bundle object from the parcel at the current 1615 * dataPosition(), using the given class loader to initialize the class 1616 * loader of the Bundle for later retrieval of Parcelable objects. 1617 * Returns null if the previously written Bundle object was null. 1618 */ 1619 public final Bundle readBundle(ClassLoader loader) { 1620 int length = readInt(); 1621 if (length < 0) { 1622 if (Bundle.DEBUG) Log.d(TAG, "null bundle: length=" + length); 1623 return null; 1624 } 1625 1626 final Bundle bundle = new Bundle(this, length); 1627 if (loader != null) { 1628 bundle.setClassLoader(loader); 1629 } 1630 return bundle; 1631 } 1632 1633 /** 1634 * Read and return a byte[] object from the parcel. 1635 */ 1636 public final byte[] createByteArray() { 1637 return nativeCreateByteArray(mNativePtr); 1638 } 1639 1640 /** 1641 * Read a byte[] object from the parcel and copy it into the 1642 * given byte array. 1643 */ 1644 public final void readByteArray(byte[] val) { 1645 // TODO: make this a native method to avoid the extra copy. 1646 byte[] ba = createByteArray(); 1647 if (ba.length == val.length) { 1648 System.arraycopy(ba, 0, val, 0, ba.length); 1649 } else { 1650 throw new RuntimeException("bad array lengths"); 1651 } 1652 } 1653 1654 /** 1655 * Read and return a String[] object from the parcel. 1656 * {@hide} 1657 */ 1658 public final String[] readStringArray() { 1659 String[] array = null; 1660 1661 int length = readInt(); 1662 if (length >= 0) 1663 { 1664 array = new String[length]; 1665 1666 for (int i = 0 ; i < length ; i++) 1667 { 1668 array[i] = readString(); 1669 } 1670 } 1671 1672 return array; 1673 } 1674 1675 /** 1676 * Read and return a CharSequence[] object from the parcel. 1677 * {@hide} 1678 */ 1679 public final CharSequence[] readCharSequenceArray() { 1680 CharSequence[] array = null; 1681 1682 int length = readInt(); 1683 if (length >= 0) 1684 { 1685 array = new CharSequence[length]; 1686 1687 for (int i = 0 ; i < length ; i++) 1688 { 1689 array[i] = readCharSequence(); 1690 } 1691 } 1692 1693 return array; 1694 } 1695 1696 /** 1697 * Read and return a new ArrayList object from the parcel at the current 1698 * dataPosition(). Returns null if the previously written list object was 1699 * null. The given class loader will be used to load any enclosed 1700 * Parcelables. 1701 */ 1702 public final ArrayList readArrayList(ClassLoader loader) { 1703 int N = readInt(); 1704 if (N < 0) { 1705 return null; 1706 } 1707 ArrayList l = new ArrayList(N); 1708 readListInternal(l, N, loader); 1709 return l; 1710 } 1711 1712 /** 1713 * Read and return a new Object array from the parcel at the current 1714 * dataPosition(). Returns null if the previously written array was 1715 * null. The given class loader will be used to load any enclosed 1716 * Parcelables. 1717 */ 1718 public final Object[] readArray(ClassLoader loader) { 1719 int N = readInt(); 1720 if (N < 0) { 1721 return null; 1722 } 1723 Object[] l = new Object[N]; 1724 readArrayInternal(l, N, loader); 1725 return l; 1726 } 1727 1728 /** 1729 * Read and return a new SparseArray object from the parcel at the current 1730 * dataPosition(). Returns null if the previously written list object was 1731 * null. The given class loader will be used to load any enclosed 1732 * Parcelables. 1733 */ 1734 public final SparseArray readSparseArray(ClassLoader loader) { 1735 int N = readInt(); 1736 if (N < 0) { 1737 return null; 1738 } 1739 SparseArray sa = new SparseArray(N); 1740 readSparseArrayInternal(sa, N, loader); 1741 return sa; 1742 } 1743 1744 /** 1745 * Read and return a new SparseBooleanArray object from the parcel at the current 1746 * dataPosition(). Returns null if the previously written list object was 1747 * null. 1748 */ 1749 public final SparseBooleanArray readSparseBooleanArray() { 1750 int N = readInt(); 1751 if (N < 0) { 1752 return null; 1753 } 1754 SparseBooleanArray sa = new SparseBooleanArray(N); 1755 readSparseBooleanArrayInternal(sa, N); 1756 return sa; 1757 } 1758 1759 /** 1760 * Read and return a new ArrayList containing a particular object type from 1761 * the parcel that was written with {@link #writeTypedList} at the 1762 * current dataPosition(). Returns null if the 1763 * previously written list object was null. The list <em>must</em> have 1764 * previously been written via {@link #writeTypedList} with the same object 1765 * type. 1766 * 1767 * @return A newly created ArrayList containing objects with the same data 1768 * as those that were previously written. 1769 * 1770 * @see #writeTypedList 1771 */ 1772 public final <T> ArrayList<T> createTypedArrayList(Parcelable.Creator<T> c) { 1773 int N = readInt(); 1774 if (N < 0) { 1775 return null; 1776 } 1777 ArrayList<T> l = new ArrayList<T>(N); 1778 while (N > 0) { 1779 if (readInt() != 0) { 1780 l.add(c.createFromParcel(this)); 1781 } else { 1782 l.add(null); 1783 } 1784 N--; 1785 } 1786 return l; 1787 } 1788 1789 /** 1790 * Read into the given List items containing a particular object type 1791 * that were written with {@link #writeTypedList} at the 1792 * current dataPosition(). The list <em>must</em> have 1793 * previously been written via {@link #writeTypedList} with the same object 1794 * type. 1795 * 1796 * @return A newly created ArrayList containing objects with the same data 1797 * as those that were previously written. 1798 * 1799 * @see #writeTypedList 1800 */ 1801 public final <T> void readTypedList(List<T> list, Parcelable.Creator<T> c) { 1802 int M = list.size(); 1803 int N = readInt(); 1804 int i = 0; 1805 for (; i < M && i < N; i++) { 1806 if (readInt() != 0) { 1807 list.set(i, c.createFromParcel(this)); 1808 } else { 1809 list.set(i, null); 1810 } 1811 } 1812 for (; i<N; i++) { 1813 if (readInt() != 0) { 1814 list.add(c.createFromParcel(this)); 1815 } else { 1816 list.add(null); 1817 } 1818 } 1819 for (; i<M; i++) { 1820 list.remove(N); 1821 } 1822 } 1823 1824 /** 1825 * Read and return a new ArrayList containing String objects from 1826 * the parcel that was written with {@link #writeStringList} at the 1827 * current dataPosition(). Returns null if the 1828 * previously written list object was null. 1829 * 1830 * @return A newly created ArrayList containing strings with the same data 1831 * as those that were previously written. 1832 * 1833 * @see #writeStringList 1834 */ 1835 public final ArrayList<String> createStringArrayList() { 1836 int N = readInt(); 1837 if (N < 0) { 1838 return null; 1839 } 1840 ArrayList<String> l = new ArrayList<String>(N); 1841 while (N > 0) { 1842 l.add(readString()); 1843 N--; 1844 } 1845 return l; 1846 } 1847 1848 /** 1849 * Read and return a new ArrayList containing IBinder objects from 1850 * the parcel that was written with {@link #writeBinderList} at the 1851 * current dataPosition(). Returns null if the 1852 * previously written list object was null. 1853 * 1854 * @return A newly created ArrayList containing strings with the same data 1855 * as those that were previously written. 1856 * 1857 * @see #writeBinderList 1858 */ 1859 public final ArrayList<IBinder> createBinderArrayList() { 1860 int N = readInt(); 1861 if (N < 0) { 1862 return null; 1863 } 1864 ArrayList<IBinder> l = new ArrayList<IBinder>(N); 1865 while (N > 0) { 1866 l.add(readStrongBinder()); 1867 N--; 1868 } 1869 return l; 1870 } 1871 1872 /** 1873 * Read into the given List items String objects that were written with 1874 * {@link #writeStringList} at the current dataPosition(). 1875 * 1876 * @return A newly created ArrayList containing strings with the same data 1877 * as those that were previously written. 1878 * 1879 * @see #writeStringList 1880 */ 1881 public final void readStringList(List<String> list) { 1882 int M = list.size(); 1883 int N = readInt(); 1884 int i = 0; 1885 for (; i < M && i < N; i++) { 1886 list.set(i, readString()); 1887 } 1888 for (; i<N; i++) { 1889 list.add(readString()); 1890 } 1891 for (; i<M; i++) { 1892 list.remove(N); 1893 } 1894 } 1895 1896 /** 1897 * Read into the given List items IBinder objects that were written with 1898 * {@link #writeBinderList} at the current dataPosition(). 1899 * 1900 * @return A newly created ArrayList containing strings with the same data 1901 * as those that were previously written. 1902 * 1903 * @see #writeBinderList 1904 */ 1905 public final void readBinderList(List<IBinder> list) { 1906 int M = list.size(); 1907 int N = readInt(); 1908 int i = 0; 1909 for (; i < M && i < N; i++) { 1910 list.set(i, readStrongBinder()); 1911 } 1912 for (; i<N; i++) { 1913 list.add(readStrongBinder()); 1914 } 1915 for (; i<M; i++) { 1916 list.remove(N); 1917 } 1918 } 1919 1920 /** 1921 * Read and return a new array containing a particular object type from 1922 * the parcel at the current dataPosition(). Returns null if the 1923 * previously written array was null. The array <em>must</em> have 1924 * previously been written via {@link #writeTypedArray} with the same 1925 * object type. 1926 * 1927 * @return A newly created array containing objects with the same data 1928 * as those that were previously written. 1929 * 1930 * @see #writeTypedArray 1931 */ 1932 public final <T> T[] createTypedArray(Parcelable.Creator<T> c) { 1933 int N = readInt(); 1934 if (N < 0) { 1935 return null; 1936 } 1937 T[] l = c.newArray(N); 1938 for (int i=0; i<N; i++) { 1939 if (readInt() != 0) { 1940 l[i] = c.createFromParcel(this); 1941 } 1942 } 1943 return l; 1944 } 1945 1946 public final <T> void readTypedArray(T[] val, Parcelable.Creator<T> c) { 1947 int N = readInt(); 1948 if (N == val.length) { 1949 for (int i=0; i<N; i++) { 1950 if (readInt() != 0) { 1951 val[i] = c.createFromParcel(this); 1952 } else { 1953 val[i] = null; 1954 } 1955 } 1956 } else { 1957 throw new RuntimeException("bad array lengths"); 1958 } 1959 } 1960 1961 /** 1962 * @deprecated 1963 * @hide 1964 */ 1965 @Deprecated 1966 public final <T> T[] readTypedArray(Parcelable.Creator<T> c) { 1967 return createTypedArray(c); 1968 } 1969 1970 /** 1971 * Write a heterogeneous array of Parcelable objects into the Parcel. 1972 * Each object in the array is written along with its class name, so 1973 * that the correct class can later be instantiated. As a result, this 1974 * has significantly more overhead than {@link #writeTypedArray}, but will 1975 * correctly handle an array containing more than one type of object. 1976 * 1977 * @param value The array of objects to be written. 1978 * @param parcelableFlags Contextual flags as per 1979 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1980 * 1981 * @see #writeTypedArray 1982 */ 1983 public final <T extends Parcelable> void writeParcelableArray(T[] value, 1984 int parcelableFlags) { 1985 if (value != null) { 1986 int N = value.length; 1987 writeInt(N); 1988 for (int i=0; i<N; i++) { 1989 writeParcelable(value[i], parcelableFlags); 1990 } 1991 } else { 1992 writeInt(-1); 1993 } 1994 } 1995 1996 /** 1997 * Read a typed object from a parcel. The given class loader will be 1998 * used to load any enclosed Parcelables. If it is null, the default class 1999 * loader will be used. 2000 */ 2001 public final Object readValue(ClassLoader loader) { 2002 int type = readInt(); 2003 2004 switch (type) { 2005 case VAL_NULL: 2006 return null; 2007 2008 case VAL_STRING: 2009 return readString(); 2010 2011 case VAL_INTEGER: 2012 return readInt(); 2013 2014 case VAL_MAP: 2015 return readHashMap(loader); 2016 2017 case VAL_PARCELABLE: 2018 return readParcelable(loader); 2019 2020 case VAL_SHORT: 2021 return (short) readInt(); 2022 2023 case VAL_LONG: 2024 return readLong(); 2025 2026 case VAL_FLOAT: 2027 return readFloat(); 2028 2029 case VAL_DOUBLE: 2030 return readDouble(); 2031 2032 case VAL_BOOLEAN: 2033 return readInt() == 1; 2034 2035 case VAL_CHARSEQUENCE: 2036 return readCharSequence(); 2037 2038 case VAL_LIST: 2039 return readArrayList(loader); 2040 2041 case VAL_BOOLEANARRAY: 2042 return createBooleanArray(); 2043 2044 case VAL_BYTEARRAY: 2045 return createByteArray(); 2046 2047 case VAL_STRINGARRAY: 2048 return readStringArray(); 2049 2050 case VAL_CHARSEQUENCEARRAY: 2051 return readCharSequenceArray(); 2052 2053 case VAL_IBINDER: 2054 return readStrongBinder(); 2055 2056 case VAL_OBJECTARRAY: 2057 return readArray(loader); 2058 2059 case VAL_INTARRAY: 2060 return createIntArray(); 2061 2062 case VAL_LONGARRAY: 2063 return createLongArray(); 2064 2065 case VAL_BYTE: 2066 return readByte(); 2067 2068 case VAL_SERIALIZABLE: 2069 return readSerializable(); 2070 2071 case VAL_PARCELABLEARRAY: 2072 return readParcelableArray(loader); 2073 2074 case VAL_SPARSEARRAY: 2075 return readSparseArray(loader); 2076 2077 case VAL_SPARSEBOOLEANARRAY: 2078 return readSparseBooleanArray(); 2079 2080 case VAL_BUNDLE: 2081 return readBundle(loader); // loading will be deferred 2082 2083 default: 2084 int off = dataPosition() - 4; 2085 throw new RuntimeException( 2086 "Parcel " + this + ": Unmarshalling unknown type code " + type + " at offset " + off); 2087 } 2088 } 2089 2090 /** 2091 * Read and return a new Parcelable from the parcel. The given class loader 2092 * will be used to load any enclosed Parcelables. If it is null, the default 2093 * class loader will be used. 2094 * @param loader A ClassLoader from which to instantiate the Parcelable 2095 * object, or null for the default class loader. 2096 * @return Returns the newly created Parcelable, or null if a null 2097 * object has been written. 2098 * @throws BadParcelableException Throws BadParcelableException if there 2099 * was an error trying to instantiate the Parcelable. 2100 */ 2101 public final <T extends Parcelable> T readParcelable(ClassLoader loader) { 2102 Parcelable.Creator<T> creator = readParcelableCreator(loader); 2103 if (creator == null) { 2104 return null; 2105 } 2106 if (creator instanceof Parcelable.ClassLoaderCreator<?>) { 2107 return ((Parcelable.ClassLoaderCreator<T>)creator).createFromParcel(this, loader); 2108 } 2109 return creator.createFromParcel(this); 2110 } 2111 2112 /** @hide */ 2113 public final <T extends Parcelable> T readCreator(Parcelable.Creator<T> creator, 2114 ClassLoader loader) { 2115 if (creator instanceof Parcelable.ClassLoaderCreator<?>) { 2116 return ((Parcelable.ClassLoaderCreator<T>)creator).createFromParcel(this, loader); 2117 } 2118 return creator.createFromParcel(this); 2119 } 2120 2121 /** @hide */ 2122 public final <T extends Parcelable> Parcelable.Creator<T> readParcelableCreator( 2123 ClassLoader loader) { 2124 String name = readString(); 2125 if (name == null) { 2126 return null; 2127 } 2128 Parcelable.Creator<T> creator; 2129 synchronized (mCreators) { 2130 HashMap<String,Parcelable.Creator> map = mCreators.get(loader); 2131 if (map == null) { 2132 map = new HashMap<String,Parcelable.Creator>(); 2133 mCreators.put(loader, map); 2134 } 2135 creator = map.get(name); 2136 if (creator == null) { 2137 try { 2138 Class c = loader == null ? 2139 Class.forName(name) : Class.forName(name, true, loader); 2140 Field f = c.getField("CREATOR"); 2141 creator = (Parcelable.Creator)f.get(null); 2142 } 2143 catch (IllegalAccessException e) { 2144 Log.e(TAG, "Illegal access when unmarshalling: " 2145 + name, e); 2146 throw new BadParcelableException( 2147 "IllegalAccessException when unmarshalling: " + name); 2148 } 2149 catch (ClassNotFoundException e) { 2150 Log.e(TAG, "Class not found when unmarshalling: " 2151 + name, e); 2152 throw new BadParcelableException( 2153 "ClassNotFoundException when unmarshalling: " + name); 2154 } 2155 catch (ClassCastException e) { 2156 throw new BadParcelableException("Parcelable protocol requires a " 2157 + "Parcelable.Creator object called " 2158 + " CREATOR on class " + name); 2159 } 2160 catch (NoSuchFieldException e) { 2161 throw new BadParcelableException("Parcelable protocol requires a " 2162 + "Parcelable.Creator object called " 2163 + " CREATOR on class " + name); 2164 } 2165 catch (NullPointerException e) { 2166 throw new BadParcelableException("Parcelable protocol requires " 2167 + "the CREATOR object to be static on class " + name); 2168 } 2169 if (creator == null) { 2170 throw new BadParcelableException("Parcelable protocol requires a " 2171 + "Parcelable.Creator object called " 2172 + " CREATOR on class " + name); 2173 } 2174 2175 map.put(name, creator); 2176 } 2177 } 2178 2179 return creator; 2180 } 2181 2182 /** 2183 * Read and return a new Parcelable array from the parcel. 2184 * The given class loader will be used to load any enclosed 2185 * Parcelables. 2186 * @return the Parcelable array, or null if the array is null 2187 */ 2188 public final Parcelable[] readParcelableArray(ClassLoader loader) { 2189 int N = readInt(); 2190 if (N < 0) { 2191 return null; 2192 } 2193 Parcelable[] p = new Parcelable[N]; 2194 for (int i = 0; i < N; i++) { 2195 p[i] = (Parcelable) readParcelable(loader); 2196 } 2197 return p; 2198 } 2199 2200 /** 2201 * Read and return a new Serializable object from the parcel. 2202 * @return the Serializable object, or null if the Serializable name 2203 * wasn't found in the parcel. 2204 */ 2205 public final Serializable readSerializable() { 2206 String name = readString(); 2207 if (name == null) { 2208 // For some reason we were unable to read the name of the Serializable (either there 2209 // is nothing left in the Parcel to read, or the next value wasn't a String), so 2210 // return null, which indicates that the name wasn't found in the parcel. 2211 return null; 2212 } 2213 2214 byte[] serializedData = createByteArray(); 2215 ByteArrayInputStream bais = new ByteArrayInputStream(serializedData); 2216 try { 2217 ObjectInputStream ois = new ObjectInputStream(bais); 2218 return (Serializable) ois.readObject(); 2219 } catch (IOException ioe) { 2220 throw new RuntimeException("Parcelable encountered " + 2221 "IOException reading a Serializable object (name = " + name + 2222 ")", ioe); 2223 } catch (ClassNotFoundException cnfe) { 2224 throw new RuntimeException("Parcelable encountered" + 2225 "ClassNotFoundException reading a Serializable object (name = " 2226 + name + ")", cnfe); 2227 } 2228 } 2229 2230 // Cache of previously looked up CREATOR.createFromParcel() methods for 2231 // particular classes. Keys are the names of the classes, values are 2232 // Method objects. 2233 private static final HashMap<ClassLoader,HashMap<String,Parcelable.Creator>> 2234 mCreators = new HashMap<ClassLoader,HashMap<String,Parcelable.Creator>>(); 2235 2236 static protected final Parcel obtain(int obj) { 2237 throw new UnsupportedOperationException(); 2238 } 2239 2240 /** @hide */ 2241 static protected final Parcel obtain(long obj) { 2242 final Parcel[] pool = sHolderPool; 2243 synchronized (pool) { 2244 Parcel p; 2245 for (int i=0; i<POOL_SIZE; i++) { 2246 p = pool[i]; 2247 if (p != null) { 2248 pool[i] = null; 2249 if (DEBUG_RECYCLE) { 2250 p.mStack = new RuntimeException(); 2251 } 2252 p.init(obj); 2253 return p; 2254 } 2255 } 2256 } 2257 return new Parcel(obj); 2258 } 2259 2260 private Parcel(long nativePtr) { 2261 if (DEBUG_RECYCLE) { 2262 mStack = new RuntimeException(); 2263 } 2264 //Log.i(TAG, "Initializing obj=0x" + Integer.toHexString(obj), mStack); 2265 init(nativePtr); 2266 } 2267 2268 private void init(long nativePtr) { 2269 if (nativePtr != 0) { 2270 mNativePtr = nativePtr; 2271 mOwnsNativeParcelObject = false; 2272 } else { 2273 mNativePtr = nativeCreate(); 2274 mOwnsNativeParcelObject = true; 2275 } 2276 } 2277 2278 private void freeBuffer() { 2279 if (mOwnsNativeParcelObject) { 2280 nativeFreeBuffer(mNativePtr); 2281 } 2282 } 2283 2284 private void destroy() { 2285 if (mNativePtr != 0) { 2286 if (mOwnsNativeParcelObject) { 2287 nativeDestroy(mNativePtr); 2288 } 2289 mNativePtr = 0; 2290 } 2291 } 2292 2293 @Override 2294 protected void finalize() throws Throwable { 2295 if (DEBUG_RECYCLE) { 2296 if (mStack != null) { 2297 Log.w(TAG, "Client did not call Parcel.recycle()", mStack); 2298 } 2299 } 2300 destroy(); 2301 } 2302 2303 /* package */ void readMapInternal(Map outVal, int N, 2304 ClassLoader loader) { 2305 while (N > 0) { 2306 Object key = readValue(loader); 2307 Object value = readValue(loader); 2308 outVal.put(key, value); 2309 N--; 2310 } 2311 } 2312 2313 /* package */ void readArrayMapInternal(ArrayMap outVal, int N, 2314 ClassLoader loader) { 2315 if (DEBUG_ARRAY_MAP) { 2316 RuntimeException here = new RuntimeException("here"); 2317 here.fillInStackTrace(); 2318 Log.d(TAG, "Reading " + N + " ArrayMap entries", here); 2319 } 2320 int startPos; 2321 while (N > 0) { 2322 if (DEBUG_ARRAY_MAP) startPos = dataPosition(); 2323 Object key = readValue(loader); 2324 Object value = readValue(loader); 2325 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Read #" + (N-1) + " " 2326 + (dataPosition()-startPos) + " bytes: key=0x" 2327 + Integer.toHexString((key != null ? key.hashCode() : 0)) + " " + key); 2328 outVal.append(key, value); 2329 N--; 2330 } 2331 } 2332 2333 /* package */ void readArrayMapSafelyInternal(ArrayMap outVal, int N, 2334 ClassLoader loader) { 2335 if (DEBUG_ARRAY_MAP) { 2336 RuntimeException here = new RuntimeException("here"); 2337 here.fillInStackTrace(); 2338 Log.d(TAG, "Reading safely " + N + " ArrayMap entries", here); 2339 } 2340 while (N > 0) { 2341 Object key = readValue(loader); 2342 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Read safe #" + (N-1) + ": key=0x" 2343 + (key != null ? key.hashCode() : 0) + " " + key); 2344 Object value = readValue(loader); 2345 outVal.put(key, value); 2346 N--; 2347 } 2348 } 2349 2350 private void readListInternal(List outVal, int N, 2351 ClassLoader loader) { 2352 while (N > 0) { 2353 Object value = readValue(loader); 2354 //Log.d(TAG, "Unmarshalling value=" + value); 2355 outVal.add(value); 2356 N--; 2357 } 2358 } 2359 2360 private void readArrayInternal(Object[] outVal, int N, 2361 ClassLoader loader) { 2362 for (int i = 0; i < N; i++) { 2363 Object value = readValue(loader); 2364 //Log.d(TAG, "Unmarshalling value=" + value); 2365 outVal[i] = value; 2366 } 2367 } 2368 2369 private void readSparseArrayInternal(SparseArray outVal, int N, 2370 ClassLoader loader) { 2371 while (N > 0) { 2372 int key = readInt(); 2373 Object value = readValue(loader); 2374 //Log.i(TAG, "Unmarshalling key=" + key + " value=" + value); 2375 outVal.append(key, value); 2376 N--; 2377 } 2378 } 2379 2380 2381 private void readSparseBooleanArrayInternal(SparseBooleanArray outVal, int N) { 2382 while (N > 0) { 2383 int key = readInt(); 2384 boolean value = this.readByte() == 1; 2385 //Log.i(TAG, "Unmarshalling key=" + key + " value=" + value); 2386 outVal.append(key, value); 2387 N--; 2388 } 2389 } 2390} 2391