Parcel.java revision ff8ef28e73c0959a4993fea975d0bdefbc27a20b
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.annotation.IntegerRes; 20import android.text.TextUtils; 21import android.util.ArrayMap; 22import android.util.Log; 23import android.util.Size; 24import android.util.SizeF; 25import android.util.SparseArray; 26import android.util.SparseBooleanArray; 27 28import java.io.ByteArrayInputStream; 29import java.io.ByteArrayOutputStream; 30import java.io.FileDescriptor; 31import java.io.FileNotFoundException; 32import java.io.IOException; 33import java.io.ObjectInputStream; 34import java.io.ObjectOutputStream; 35import java.io.ObjectStreamClass; 36import java.io.Serializable; 37import java.lang.reflect.Field; 38import java.lang.reflect.Modifier; 39import java.util.ArrayList; 40import java.util.Arrays; 41import java.util.HashMap; 42import java.util.List; 43import java.util.Map; 44import java.util.Set; 45 46import dalvik.system.VMRuntime; 47 48/** 49 * Container for a message (data and object references) that can 50 * be sent through an IBinder. A Parcel can contain both flattened data 51 * that will be unflattened on the other side of the IPC (using the various 52 * methods here for writing specific types, or the general 53 * {@link Parcelable} interface), and references to live {@link IBinder} 54 * objects that will result in the other side receiving a proxy IBinder 55 * connected with the original IBinder in the Parcel. 56 * 57 * <p class="note">Parcel is <strong>not</strong> a general-purpose 58 * serialization mechanism. This class (and the corresponding 59 * {@link Parcelable} API for placing arbitrary objects into a Parcel) is 60 * designed as a high-performance IPC transport. As such, it is not 61 * appropriate to place any Parcel data in to persistent storage: changes 62 * in the underlying implementation of any of the data in the Parcel can 63 * render older data unreadable.</p> 64 * 65 * <p>The bulk of the Parcel API revolves around reading and writing data 66 * of various types. There are six major classes of such functions available.</p> 67 * 68 * <h3>Primitives</h3> 69 * 70 * <p>The most basic data functions are for writing and reading primitive 71 * data types: {@link #writeByte}, {@link #readByte}, {@link #writeDouble}, 72 * {@link #readDouble}, {@link #writeFloat}, {@link #readFloat}, {@link #writeInt}, 73 * {@link #readInt}, {@link #writeLong}, {@link #readLong}, 74 * {@link #writeString}, {@link #readString}. Most other 75 * data operations are built on top of these. The given data is written and 76 * read using the endianess of the host CPU.</p> 77 * 78 * <h3>Primitive Arrays</h3> 79 * 80 * <p>There are a variety of methods for reading and writing raw arrays 81 * of primitive objects, which generally result in writing a 4-byte length 82 * followed by the primitive data items. The methods for reading can either 83 * read the data into an existing array, or create and return a new array. 84 * These available types are:</p> 85 * 86 * <ul> 87 * <li> {@link #writeBooleanArray(boolean[])}, 88 * {@link #readBooleanArray(boolean[])}, {@link #createBooleanArray()} 89 * <li> {@link #writeByteArray(byte[])}, 90 * {@link #writeByteArray(byte[], int, int)}, {@link #readByteArray(byte[])}, 91 * {@link #createByteArray()} 92 * <li> {@link #writeCharArray(char[])}, {@link #readCharArray(char[])}, 93 * {@link #createCharArray()} 94 * <li> {@link #writeDoubleArray(double[])}, {@link #readDoubleArray(double[])}, 95 * {@link #createDoubleArray()} 96 * <li> {@link #writeFloatArray(float[])}, {@link #readFloatArray(float[])}, 97 * {@link #createFloatArray()} 98 * <li> {@link #writeIntArray(int[])}, {@link #readIntArray(int[])}, 99 * {@link #createIntArray()} 100 * <li> {@link #writeLongArray(long[])}, {@link #readLongArray(long[])}, 101 * {@link #createLongArray()} 102 * <li> {@link #writeStringArray(String[])}, {@link #readStringArray(String[])}, 103 * {@link #createStringArray()}. 104 * <li> {@link #writeSparseBooleanArray(SparseBooleanArray)}, 105 * {@link #readSparseBooleanArray()}. 106 * </ul> 107 * 108 * <h3>Parcelables</h3> 109 * 110 * <p>The {@link Parcelable} protocol provides an extremely efficient (but 111 * low-level) protocol for objects to write and read themselves from Parcels. 112 * You can use the direct methods {@link #writeParcelable(Parcelable, int)} 113 * and {@link #readParcelable(ClassLoader)} or 114 * {@link #writeParcelableArray} and 115 * {@link #readParcelableArray(ClassLoader)} to write or read. These 116 * methods write both the class type and its data to the Parcel, allowing 117 * that class to be reconstructed from the appropriate class loader when 118 * later reading.</p> 119 * 120 * <p>There are also some methods that provide a more efficient way to work 121 * with Parcelables: {@link #writeTypedObject}, {@link #writeTypedArray}, 122 * {@link #writeTypedList}, {@link #readTypedObject}, 123 * {@link #createTypedArray} and {@link #createTypedArrayList}. These methods 124 * do not write the class information of the original object: instead, the 125 * caller of the read function must know what type to expect and pass in the 126 * appropriate {@link Parcelable.Creator Parcelable.Creator} instead to 127 * properly construct the new object and read its data. (To more efficient 128 * write and read a single Parceable object that is not null, you can directly 129 * call {@link Parcelable#writeToParcel Parcelable.writeToParcel} and 130 * {@link Parcelable.Creator#createFromParcel Parcelable.Creator.createFromParcel} 131 * yourself.)</p> 132 * 133 * <h3>Bundles</h3> 134 * 135 * <p>A special type-safe container, called {@link Bundle}, is available 136 * for key/value maps of heterogeneous values. This has many optimizations 137 * for improved performance when reading and writing data, and its type-safe 138 * API avoids difficult to debug type errors when finally marshalling the 139 * data contents into a Parcel. The methods to use are 140 * {@link #writeBundle(Bundle)}, {@link #readBundle()}, and 141 * {@link #readBundle(ClassLoader)}. 142 * 143 * <h3>Active Objects</h3> 144 * 145 * <p>An unusual feature of Parcel is the ability to read and write active 146 * objects. For these objects the actual contents of the object is not 147 * written, rather a special token referencing the object is written. When 148 * reading the object back from the Parcel, you do not get a new instance of 149 * the object, but rather a handle that operates on the exact same object that 150 * was originally written. There are two forms of active objects available.</p> 151 * 152 * <p>{@link Binder} objects are a core facility of Android's general cross-process 153 * communication system. The {@link IBinder} interface describes an abstract 154 * protocol with a Binder object. Any such interface can be written in to 155 * a Parcel, and upon reading you will receive either the original object 156 * implementing that interface or a special proxy implementation 157 * that communicates calls back to the original object. The methods to use are 158 * {@link #writeStrongBinder(IBinder)}, 159 * {@link #writeStrongInterface(IInterface)}, {@link #readStrongBinder()}, 160 * {@link #writeBinderArray(IBinder[])}, {@link #readBinderArray(IBinder[])}, 161 * {@link #createBinderArray()}, 162 * {@link #writeBinderList(List)}, {@link #readBinderList(List)}, 163 * {@link #createBinderArrayList()}.</p> 164 * 165 * <p>FileDescriptor objects, representing raw Linux file descriptor identifiers, 166 * can be written and {@link ParcelFileDescriptor} objects returned to operate 167 * on the original file descriptor. The returned file descriptor is a dup 168 * of the original file descriptor: the object and fd is different, but 169 * operating on the same underlying file stream, with the same position, etc. 170 * The methods to use are {@link #writeFileDescriptor(FileDescriptor)}, 171 * {@link #readFileDescriptor()}. 172 * 173 * <h3>Untyped Containers</h3> 174 * 175 * <p>A final class of methods are for writing and reading standard Java 176 * containers of arbitrary types. These all revolve around the 177 * {@link #writeValue(Object)} and {@link #readValue(ClassLoader)} methods 178 * which define the types of objects allowed. The container methods are 179 * {@link #writeArray(Object[])}, {@link #readArray(ClassLoader)}, 180 * {@link #writeList(List)}, {@link #readList(List, ClassLoader)}, 181 * {@link #readArrayList(ClassLoader)}, 182 * {@link #writeMap(Map)}, {@link #readMap(Map, ClassLoader)}, 183 * {@link #writeSparseArray(SparseArray)}, 184 * {@link #readSparseArray(ClassLoader)}. 185 */ 186public final class Parcel { 187 private static final boolean DEBUG_RECYCLE = false; 188 private static final boolean DEBUG_ARRAY_MAP = false; 189 private static final String TAG = "Parcel"; 190 191 @SuppressWarnings({"UnusedDeclaration"}) 192 private long mNativePtr; // used by native code 193 194 /** 195 * Flag indicating if {@link #mNativePtr} was allocated by this object, 196 * indicating that we're responsible for its lifecycle. 197 */ 198 private boolean mOwnsNativeParcelObject; 199 private long mNativeSize; 200 201 private RuntimeException mStack; 202 203 private static final int POOL_SIZE = 6; 204 private static final Parcel[] sOwnedPool = new Parcel[POOL_SIZE]; 205 private static final Parcel[] sHolderPool = new Parcel[POOL_SIZE]; 206 207 private static final int VAL_NULL = -1; 208 private static final int VAL_STRING = 0; 209 private static final int VAL_INTEGER = 1; 210 private static final int VAL_MAP = 2; 211 private static final int VAL_BUNDLE = 3; 212 private static final int VAL_PARCELABLE = 4; 213 private static final int VAL_SHORT = 5; 214 private static final int VAL_LONG = 6; 215 private static final int VAL_FLOAT = 7; 216 private static final int VAL_DOUBLE = 8; 217 private static final int VAL_BOOLEAN = 9; 218 private static final int VAL_CHARSEQUENCE = 10; 219 private static final int VAL_LIST = 11; 220 private static final int VAL_SPARSEARRAY = 12; 221 private static final int VAL_BYTEARRAY = 13; 222 private static final int VAL_STRINGARRAY = 14; 223 private static final int VAL_IBINDER = 15; 224 private static final int VAL_PARCELABLEARRAY = 16; 225 private static final int VAL_OBJECTARRAY = 17; 226 private static final int VAL_INTARRAY = 18; 227 private static final int VAL_LONGARRAY = 19; 228 private static final int VAL_BYTE = 20; 229 private static final int VAL_SERIALIZABLE = 21; 230 private static final int VAL_SPARSEBOOLEANARRAY = 22; 231 private static final int VAL_BOOLEANARRAY = 23; 232 private static final int VAL_CHARSEQUENCEARRAY = 24; 233 private static final int VAL_PERSISTABLEBUNDLE = 25; 234 private static final int VAL_SIZE = 26; 235 private static final int VAL_SIZEF = 27; 236 private static final int VAL_DOUBLEARRAY = 28; 237 238 // The initial int32 in a Binder call's reply Parcel header: 239 private static final int EX_SECURITY = -1; 240 private static final int EX_BAD_PARCELABLE = -2; 241 private static final int EX_ILLEGAL_ARGUMENT = -3; 242 private static final int EX_NULL_POINTER = -4; 243 private static final int EX_ILLEGAL_STATE = -5; 244 private static final int EX_NETWORK_MAIN_THREAD = -6; 245 private static final int EX_UNSUPPORTED_OPERATION = -7; 246 private static final int EX_HAS_REPLY_HEADER = -128; // special; see below 247 248 private static native int nativeDataSize(long nativePtr); 249 private static native int nativeDataAvail(long nativePtr); 250 private static native int nativeDataPosition(long nativePtr); 251 private static native int nativeDataCapacity(long nativePtr); 252 private static native long nativeSetDataSize(long nativePtr, int size); 253 private static native void nativeSetDataPosition(long nativePtr, int pos); 254 private static native void nativeSetDataCapacity(long nativePtr, int size); 255 256 private static native boolean nativePushAllowFds(long nativePtr, boolean allowFds); 257 private static native void nativeRestoreAllowFds(long nativePtr, boolean lastValue); 258 259 private static native void nativeWriteByteArray(long nativePtr, byte[] b, int offset, int len); 260 private static native void nativeWriteBlob(long nativePtr, byte[] b, int offset, int len); 261 private static native void nativeWriteInt(long nativePtr, int val); 262 private static native void nativeWriteLong(long nativePtr, long val); 263 private static native void nativeWriteFloat(long nativePtr, float val); 264 private static native void nativeWriteDouble(long nativePtr, double val); 265 private static native void nativeWriteString(long nativePtr, String val); 266 private static native void nativeWriteStrongBinder(long nativePtr, IBinder val); 267 private static native long nativeWriteFileDescriptor(long nativePtr, FileDescriptor val); 268 269 private static native byte[] nativeCreateByteArray(long nativePtr); 270 private static native byte[] nativeReadBlob(long nativePtr); 271 private static native int nativeReadInt(long nativePtr); 272 private static native long nativeReadLong(long nativePtr); 273 private static native float nativeReadFloat(long nativePtr); 274 private static native double nativeReadDouble(long nativePtr); 275 private static native String nativeReadString(long nativePtr); 276 private static native IBinder nativeReadStrongBinder(long nativePtr); 277 private static native FileDescriptor nativeReadFileDescriptor(long nativePtr); 278 279 private static native long nativeCreate(); 280 private static native long nativeFreeBuffer(long nativePtr); 281 private static native void nativeDestroy(long nativePtr); 282 283 private static native byte[] nativeMarshall(long nativePtr); 284 private static native long nativeUnmarshall( 285 long nativePtr, byte[] data, int offset, int length); 286 private static native long nativeAppendFrom( 287 long thisNativePtr, long otherNativePtr, int offset, int length); 288 private static native boolean nativeHasFileDescriptors(long nativePtr); 289 private static native void nativeWriteInterfaceToken(long nativePtr, String interfaceName); 290 private static native void nativeEnforceInterface(long nativePtr, String interfaceName); 291 292 private static native long nativeGetBlobAshmemSize(long nativePtr); 293 294 public final static Parcelable.Creator<String> STRING_CREATOR 295 = new Parcelable.Creator<String>() { 296 public String createFromParcel(Parcel source) { 297 return source.readString(); 298 } 299 public String[] newArray(int size) { 300 return new String[size]; 301 } 302 }; 303 304 /** 305 * Retrieve a new Parcel object from the pool. 306 */ 307 public static Parcel obtain() { 308 final Parcel[] pool = sOwnedPool; 309 synchronized (pool) { 310 Parcel p; 311 for (int i=0; i<POOL_SIZE; i++) { 312 p = pool[i]; 313 if (p != null) { 314 pool[i] = null; 315 if (DEBUG_RECYCLE) { 316 p.mStack = new RuntimeException(); 317 } 318 return p; 319 } 320 } 321 } 322 return new Parcel(0); 323 } 324 325 /** 326 * Put a Parcel object back into the pool. You must not touch 327 * the object after this call. 328 */ 329 public final void recycle() { 330 if (DEBUG_RECYCLE) mStack = null; 331 freeBuffer(); 332 333 final Parcel[] pool; 334 if (mOwnsNativeParcelObject) { 335 pool = sOwnedPool; 336 } else { 337 mNativePtr = 0; 338 pool = sHolderPool; 339 } 340 341 synchronized (pool) { 342 for (int i=0; i<POOL_SIZE; i++) { 343 if (pool[i] == null) { 344 pool[i] = this; 345 return; 346 } 347 } 348 } 349 } 350 351 /** @hide */ 352 public static native long getGlobalAllocSize(); 353 354 /** @hide */ 355 public static native long getGlobalAllocCount(); 356 357 /** 358 * Returns the total amount of data contained in the parcel. 359 */ 360 public final int dataSize() { 361 return nativeDataSize(mNativePtr); 362 } 363 364 /** 365 * Returns the amount of data remaining to be read from the 366 * parcel. That is, {@link #dataSize}-{@link #dataPosition}. 367 */ 368 public final int dataAvail() { 369 return nativeDataAvail(mNativePtr); 370 } 371 372 /** 373 * Returns the current position in the parcel data. Never 374 * more than {@link #dataSize}. 375 */ 376 public final int dataPosition() { 377 return nativeDataPosition(mNativePtr); 378 } 379 380 /** 381 * Returns the total amount of space in the parcel. This is always 382 * >= {@link #dataSize}. The difference between it and dataSize() is the 383 * amount of room left until the parcel needs to re-allocate its 384 * data buffer. 385 */ 386 public final int dataCapacity() { 387 return nativeDataCapacity(mNativePtr); 388 } 389 390 /** 391 * Change the amount of data in the parcel. Can be either smaller or 392 * larger than the current size. If larger than the current capacity, 393 * more memory will be allocated. 394 * 395 * @param size The new number of bytes in the Parcel. 396 */ 397 public final void setDataSize(int size) { 398 updateNativeSize(nativeSetDataSize(mNativePtr, size)); 399 } 400 401 /** 402 * Move the current read/write position in the parcel. 403 * @param pos New offset in the parcel; must be between 0 and 404 * {@link #dataSize}. 405 */ 406 public final void setDataPosition(int pos) { 407 nativeSetDataPosition(mNativePtr, pos); 408 } 409 410 /** 411 * Change the capacity (current available space) of the parcel. 412 * 413 * @param size The new capacity of the parcel, in bytes. Can not be 414 * less than {@link #dataSize} -- that is, you can not drop existing data 415 * with this method. 416 */ 417 public final void setDataCapacity(int size) { 418 nativeSetDataCapacity(mNativePtr, size); 419 } 420 421 /** @hide */ 422 public final boolean pushAllowFds(boolean allowFds) { 423 return nativePushAllowFds(mNativePtr, allowFds); 424 } 425 426 /** @hide */ 427 public final void restoreAllowFds(boolean lastValue) { 428 nativeRestoreAllowFds(mNativePtr, lastValue); 429 } 430 431 /** 432 * Returns the raw bytes of the parcel. 433 * 434 * <p class="note">The data you retrieve here <strong>must not</strong> 435 * be placed in any kind of persistent storage (on local disk, across 436 * a network, etc). For that, you should use standard serialization 437 * or another kind of general serialization mechanism. The Parcel 438 * marshalled representation is highly optimized for local IPC, and as 439 * such does not attempt to maintain compatibility with data created 440 * in different versions of the platform. 441 */ 442 public final byte[] marshall() { 443 return nativeMarshall(mNativePtr); 444 } 445 446 /** 447 * Set the bytes in data to be the raw bytes of this Parcel. 448 */ 449 public final void unmarshall(byte[] data, int offset, int length) { 450 updateNativeSize(nativeUnmarshall(mNativePtr, data, offset, length)); 451 } 452 453 public final void appendFrom(Parcel parcel, int offset, int length) { 454 updateNativeSize(nativeAppendFrom(mNativePtr, parcel.mNativePtr, offset, length)); 455 } 456 457 /** 458 * Report whether the parcel contains any marshalled file descriptors. 459 */ 460 public final boolean hasFileDescriptors() { 461 return nativeHasFileDescriptors(mNativePtr); 462 } 463 464 /** 465 * Store or read an IBinder interface token in the parcel at the current 466 * {@link #dataPosition}. This is used to validate that the marshalled 467 * transaction is intended for the target interface. 468 */ 469 public final void writeInterfaceToken(String interfaceName) { 470 nativeWriteInterfaceToken(mNativePtr, interfaceName); 471 } 472 473 public final void enforceInterface(String interfaceName) { 474 nativeEnforceInterface(mNativePtr, interfaceName); 475 } 476 477 /** 478 * Write a byte array into the parcel at the current {@link #dataPosition}, 479 * growing {@link #dataCapacity} if needed. 480 * @param b Bytes to place into the parcel. 481 */ 482 public final void writeByteArray(byte[] b) { 483 writeByteArray(b, 0, (b != null) ? b.length : 0); 484 } 485 486 /** 487 * Write a byte array into the parcel at the current {@link #dataPosition}, 488 * growing {@link #dataCapacity} if needed. 489 * @param b Bytes to place into the parcel. 490 * @param offset Index of first byte to be written. 491 * @param len Number of bytes to write. 492 */ 493 public final void writeByteArray(byte[] b, int offset, int len) { 494 if (b == null) { 495 writeInt(-1); 496 return; 497 } 498 Arrays.checkOffsetAndCount(b.length, offset, len); 499 nativeWriteByteArray(mNativePtr, b, offset, len); 500 } 501 502 /** 503 * Write a blob of data into the parcel at the current {@link #dataPosition}, 504 * growing {@link #dataCapacity} if needed. 505 * @param b Bytes to place into the parcel. 506 * {@hide} 507 * {@SystemApi} 508 */ 509 public final void writeBlob(byte[] b) { 510 writeBlob(b, 0, (b != null) ? b.length : 0); 511 } 512 513 /** 514 * Write a blob of data into the parcel at the current {@link #dataPosition}, 515 * growing {@link #dataCapacity} if needed. 516 * @param b Bytes to place into the parcel. 517 * @param offset Index of first byte to be written. 518 * @param len Number of bytes to write. 519 * {@hide} 520 * {@SystemApi} 521 */ 522 public final void writeBlob(byte[] b, int offset, int len) { 523 if (b == null) { 524 writeInt(-1); 525 return; 526 } 527 Arrays.checkOffsetAndCount(b.length, offset, len); 528 nativeWriteBlob(mNativePtr, b, offset, len); 529 } 530 531 /** 532 * Write an integer value into the parcel at the current dataPosition(), 533 * growing dataCapacity() if needed. 534 */ 535 public final void writeInt(int val) { 536 nativeWriteInt(mNativePtr, val); 537 } 538 539 /** 540 * Write a long integer value into the parcel at the current dataPosition(), 541 * growing dataCapacity() if needed. 542 */ 543 public final void writeLong(long val) { 544 nativeWriteLong(mNativePtr, val); 545 } 546 547 /** 548 * Write a floating point value into the parcel at the current 549 * dataPosition(), growing dataCapacity() if needed. 550 */ 551 public final void writeFloat(float val) { 552 nativeWriteFloat(mNativePtr, val); 553 } 554 555 /** 556 * Write a double precision floating point value into the parcel at the 557 * current dataPosition(), growing dataCapacity() if needed. 558 */ 559 public final void writeDouble(double val) { 560 nativeWriteDouble(mNativePtr, val); 561 } 562 563 /** 564 * Write a string value into the parcel at the current dataPosition(), 565 * growing dataCapacity() if needed. 566 */ 567 public final void writeString(String val) { 568 nativeWriteString(mNativePtr, val); 569 } 570 571 /** 572 * Write a CharSequence value into the parcel at the current dataPosition(), 573 * growing dataCapacity() if needed. 574 * @hide 575 */ 576 public final void writeCharSequence(CharSequence val) { 577 TextUtils.writeToParcel(val, this, 0); 578 } 579 580 /** 581 * Write an object into the parcel at the current dataPosition(), 582 * growing dataCapacity() if needed. 583 */ 584 public final void writeStrongBinder(IBinder val) { 585 nativeWriteStrongBinder(mNativePtr, val); 586 } 587 588 /** 589 * Write an object into the parcel at the current dataPosition(), 590 * growing dataCapacity() if needed. 591 */ 592 public final void writeStrongInterface(IInterface val) { 593 writeStrongBinder(val == null ? null : val.asBinder()); 594 } 595 596 /** 597 * Write a FileDescriptor into the parcel at the current dataPosition(), 598 * growing dataCapacity() if needed. 599 * 600 * <p class="caution">The file descriptor will not be closed, which may 601 * result in file descriptor leaks when objects are returned from Binder 602 * calls. Use {@link ParcelFileDescriptor#writeToParcel} instead, which 603 * accepts contextual flags and will close the original file descriptor 604 * if {@link Parcelable#PARCELABLE_WRITE_RETURN_VALUE} is set.</p> 605 */ 606 public final void writeFileDescriptor(FileDescriptor val) { 607 updateNativeSize(nativeWriteFileDescriptor(mNativePtr, val)); 608 } 609 610 private void updateNativeSize(long newNativeSize) { 611 if (mOwnsNativeParcelObject) { 612 if (newNativeSize > Integer.MAX_VALUE) { 613 newNativeSize = Integer.MAX_VALUE; 614 } 615 if (newNativeSize != mNativeSize) { 616 int delta = (int) (newNativeSize - mNativeSize); 617 if (delta > 0) { 618 VMRuntime.getRuntime().registerNativeAllocation(delta); 619 } else { 620 VMRuntime.getRuntime().registerNativeFree(-delta); 621 } 622 mNativeSize = newNativeSize; 623 } 624 } 625 } 626 627 /** 628 * {@hide} 629 * This will be the new name for writeFileDescriptor, for consistency. 630 **/ 631 public final void writeRawFileDescriptor(FileDescriptor val) { 632 nativeWriteFileDescriptor(mNativePtr, val); 633 } 634 635 /** 636 * {@hide} 637 * Write an array of FileDescriptor objects into the Parcel. 638 * 639 * @param value The array of objects to be written. 640 */ 641 public final void writeRawFileDescriptorArray(FileDescriptor[] value) { 642 if (value != null) { 643 int N = value.length; 644 writeInt(N); 645 for (int i=0; i<N; i++) { 646 writeRawFileDescriptor(value[i]); 647 } 648 } else { 649 writeInt(-1); 650 } 651 } 652 653 /** 654 * Write a byte value into the parcel at the current dataPosition(), 655 * growing dataCapacity() if needed. 656 */ 657 public final void writeByte(byte val) { 658 writeInt(val); 659 } 660 661 /** 662 * Please use {@link #writeBundle} instead. Flattens a Map into the parcel 663 * at the current dataPosition(), 664 * growing dataCapacity() if needed. The Map keys must be String objects. 665 * The Map values are written using {@link #writeValue} and must follow 666 * the specification there. 667 * 668 * <p>It is strongly recommended to use {@link #writeBundle} instead of 669 * this method, since the Bundle class provides a type-safe API that 670 * allows you to avoid mysterious type errors at the point of marshalling. 671 */ 672 public final void writeMap(Map val) { 673 writeMapInternal((Map<String, Object>) val); 674 } 675 676 /** 677 * Flatten a Map into the parcel at the current dataPosition(), 678 * growing dataCapacity() if needed. The Map keys must be String objects. 679 */ 680 /* package */ void writeMapInternal(Map<String,Object> val) { 681 if (val == null) { 682 writeInt(-1); 683 return; 684 } 685 Set<Map.Entry<String,Object>> entries = val.entrySet(); 686 writeInt(entries.size()); 687 for (Map.Entry<String,Object> e : entries) { 688 writeValue(e.getKey()); 689 writeValue(e.getValue()); 690 } 691 } 692 693 /** 694 * Flatten an ArrayMap into the parcel at the current dataPosition(), 695 * growing dataCapacity() if needed. The Map keys must be String objects. 696 */ 697 /* package */ void writeArrayMapInternal(ArrayMap<String, Object> val) { 698 if (val == null) { 699 writeInt(-1); 700 return; 701 } 702 final int N = val.size(); 703 writeInt(N); 704 if (DEBUG_ARRAY_MAP) { 705 RuntimeException here = new RuntimeException("here"); 706 here.fillInStackTrace(); 707 Log.d(TAG, "Writing " + N + " ArrayMap entries", here); 708 } 709 int startPos; 710 for (int i=0; i<N; i++) { 711 if (DEBUG_ARRAY_MAP) startPos = dataPosition(); 712 writeString(val.keyAt(i)); 713 writeValue(val.valueAt(i)); 714 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Write #" + i + " " 715 + (dataPosition()-startPos) + " bytes: key=0x" 716 + Integer.toHexString(val.keyAt(i) != null ? val.keyAt(i).hashCode() : 0) 717 + " " + val.keyAt(i)); 718 } 719 } 720 721 /** 722 * @hide For testing only. 723 */ 724 public void writeArrayMap(ArrayMap<String, Object> val) { 725 writeArrayMapInternal(val); 726 } 727 728 /** 729 * Flatten a Bundle into the parcel at the current dataPosition(), 730 * growing dataCapacity() if needed. 731 */ 732 public final void writeBundle(Bundle val) { 733 if (val == null) { 734 writeInt(-1); 735 return; 736 } 737 738 val.writeToParcel(this, 0); 739 } 740 741 /** 742 * Flatten a PersistableBundle into the parcel at the current dataPosition(), 743 * growing dataCapacity() if needed. 744 */ 745 public final void writePersistableBundle(PersistableBundle val) { 746 if (val == null) { 747 writeInt(-1); 748 return; 749 } 750 751 val.writeToParcel(this, 0); 752 } 753 754 /** 755 * Flatten a Size into the parcel at the current dataPosition(), 756 * growing dataCapacity() if needed. 757 */ 758 public final void writeSize(Size val) { 759 writeInt(val.getWidth()); 760 writeInt(val.getHeight()); 761 } 762 763 /** 764 * Flatten a SizeF into the parcel at the current dataPosition(), 765 * growing dataCapacity() if needed. 766 */ 767 public final void writeSizeF(SizeF val) { 768 writeFloat(val.getWidth()); 769 writeFloat(val.getHeight()); 770 } 771 772 /** 773 * Flatten a List into the parcel at the current dataPosition(), growing 774 * dataCapacity() if needed. The List values are written using 775 * {@link #writeValue} and must follow the specification there. 776 */ 777 public final void writeList(List val) { 778 if (val == null) { 779 writeInt(-1); 780 return; 781 } 782 int N = val.size(); 783 int i=0; 784 writeInt(N); 785 while (i < N) { 786 writeValue(val.get(i)); 787 i++; 788 } 789 } 790 791 /** 792 * Flatten an Object array into the parcel at the current dataPosition(), 793 * growing dataCapacity() if needed. The array values are written using 794 * {@link #writeValue} and must follow the specification there. 795 */ 796 public final void writeArray(Object[] val) { 797 if (val == null) { 798 writeInt(-1); 799 return; 800 } 801 int N = val.length; 802 int i=0; 803 writeInt(N); 804 while (i < N) { 805 writeValue(val[i]); 806 i++; 807 } 808 } 809 810 /** 811 * Flatten a generic SparseArray into the parcel at the current 812 * dataPosition(), growing dataCapacity() if needed. The SparseArray 813 * values are written using {@link #writeValue} and must follow the 814 * specification there. 815 */ 816 public final void writeSparseArray(SparseArray<Object> val) { 817 if (val == null) { 818 writeInt(-1); 819 return; 820 } 821 int N = val.size(); 822 writeInt(N); 823 int i=0; 824 while (i < N) { 825 writeInt(val.keyAt(i)); 826 writeValue(val.valueAt(i)); 827 i++; 828 } 829 } 830 831 public final void writeSparseBooleanArray(SparseBooleanArray val) { 832 if (val == null) { 833 writeInt(-1); 834 return; 835 } 836 int N = val.size(); 837 writeInt(N); 838 int i=0; 839 while (i < N) { 840 writeInt(val.keyAt(i)); 841 writeByte((byte)(val.valueAt(i) ? 1 : 0)); 842 i++; 843 } 844 } 845 846 public final void writeBooleanArray(boolean[] val) { 847 if (val != null) { 848 int N = val.length; 849 writeInt(N); 850 for (int i=0; i<N; i++) { 851 writeInt(val[i] ? 1 : 0); 852 } 853 } else { 854 writeInt(-1); 855 } 856 } 857 858 public final boolean[] createBooleanArray() { 859 int N = readInt(); 860 // >>2 as a fast divide-by-4 works in the create*Array() functions 861 // because dataAvail() will never return a negative number. 4 is 862 // the size of a stored boolean in the stream. 863 if (N >= 0 && N <= (dataAvail() >> 2)) { 864 boolean[] val = new boolean[N]; 865 for (int i=0; i<N; i++) { 866 val[i] = readInt() != 0; 867 } 868 return val; 869 } else { 870 return null; 871 } 872 } 873 874 public final void readBooleanArray(boolean[] val) { 875 int N = readInt(); 876 if (N == val.length) { 877 for (int i=0; i<N; i++) { 878 val[i] = readInt() != 0; 879 } 880 } else { 881 throw new RuntimeException("bad array lengths"); 882 } 883 } 884 885 public final void writeCharArray(char[] val) { 886 if (val != null) { 887 int N = val.length; 888 writeInt(N); 889 for (int i=0; i<N; i++) { 890 writeInt((int)val[i]); 891 } 892 } else { 893 writeInt(-1); 894 } 895 } 896 897 public final char[] createCharArray() { 898 int N = readInt(); 899 if (N >= 0 && N <= (dataAvail() >> 2)) { 900 char[] val = new char[N]; 901 for (int i=0; i<N; i++) { 902 val[i] = (char)readInt(); 903 } 904 return val; 905 } else { 906 return null; 907 } 908 } 909 910 public final void readCharArray(char[] val) { 911 int N = readInt(); 912 if (N == val.length) { 913 for (int i=0; i<N; i++) { 914 val[i] = (char)readInt(); 915 } 916 } else { 917 throw new RuntimeException("bad array lengths"); 918 } 919 } 920 921 public final void writeIntArray(int[] val) { 922 if (val != null) { 923 int N = val.length; 924 writeInt(N); 925 for (int i=0; i<N; i++) { 926 writeInt(val[i]); 927 } 928 } else { 929 writeInt(-1); 930 } 931 } 932 933 public final int[] createIntArray() { 934 int N = readInt(); 935 if (N >= 0 && N <= (dataAvail() >> 2)) { 936 int[] val = new int[N]; 937 for (int i=0; i<N; i++) { 938 val[i] = readInt(); 939 } 940 return val; 941 } else { 942 return null; 943 } 944 } 945 946 public final void readIntArray(int[] val) { 947 int N = readInt(); 948 if (N == val.length) { 949 for (int i=0; i<N; i++) { 950 val[i] = readInt(); 951 } 952 } else { 953 throw new RuntimeException("bad array lengths"); 954 } 955 } 956 957 public final void writeLongArray(long[] val) { 958 if (val != null) { 959 int N = val.length; 960 writeInt(N); 961 for (int i=0; i<N; i++) { 962 writeLong(val[i]); 963 } 964 } else { 965 writeInt(-1); 966 } 967 } 968 969 public final long[] createLongArray() { 970 int N = readInt(); 971 // >>3 because stored longs are 64 bits 972 if (N >= 0 && N <= (dataAvail() >> 3)) { 973 long[] val = new long[N]; 974 for (int i=0; i<N; i++) { 975 val[i] = readLong(); 976 } 977 return val; 978 } else { 979 return null; 980 } 981 } 982 983 public final void readLongArray(long[] val) { 984 int N = readInt(); 985 if (N == val.length) { 986 for (int i=0; i<N; i++) { 987 val[i] = readLong(); 988 } 989 } else { 990 throw new RuntimeException("bad array lengths"); 991 } 992 } 993 994 public final void writeFloatArray(float[] val) { 995 if (val != null) { 996 int N = val.length; 997 writeInt(N); 998 for (int i=0; i<N; i++) { 999 writeFloat(val[i]); 1000 } 1001 } else { 1002 writeInt(-1); 1003 } 1004 } 1005 1006 public final float[] createFloatArray() { 1007 int N = readInt(); 1008 // >>2 because stored floats are 4 bytes 1009 if (N >= 0 && N <= (dataAvail() >> 2)) { 1010 float[] val = new float[N]; 1011 for (int i=0; i<N; i++) { 1012 val[i] = readFloat(); 1013 } 1014 return val; 1015 } else { 1016 return null; 1017 } 1018 } 1019 1020 public final void readFloatArray(float[] val) { 1021 int N = readInt(); 1022 if (N == val.length) { 1023 for (int i=0; i<N; i++) { 1024 val[i] = readFloat(); 1025 } 1026 } else { 1027 throw new RuntimeException("bad array lengths"); 1028 } 1029 } 1030 1031 public final void writeDoubleArray(double[] val) { 1032 if (val != null) { 1033 int N = val.length; 1034 writeInt(N); 1035 for (int i=0; i<N; i++) { 1036 writeDouble(val[i]); 1037 } 1038 } else { 1039 writeInt(-1); 1040 } 1041 } 1042 1043 public final double[] createDoubleArray() { 1044 int N = readInt(); 1045 // >>3 because stored doubles are 8 bytes 1046 if (N >= 0 && N <= (dataAvail() >> 3)) { 1047 double[] val = new double[N]; 1048 for (int i=0; i<N; i++) { 1049 val[i] = readDouble(); 1050 } 1051 return val; 1052 } else { 1053 return null; 1054 } 1055 } 1056 1057 public final void readDoubleArray(double[] val) { 1058 int N = readInt(); 1059 if (N == val.length) { 1060 for (int i=0; i<N; i++) { 1061 val[i] = readDouble(); 1062 } 1063 } else { 1064 throw new RuntimeException("bad array lengths"); 1065 } 1066 } 1067 1068 public final void writeStringArray(String[] val) { 1069 if (val != null) { 1070 int N = val.length; 1071 writeInt(N); 1072 for (int i=0; i<N; i++) { 1073 writeString(val[i]); 1074 } 1075 } else { 1076 writeInt(-1); 1077 } 1078 } 1079 1080 public final String[] createStringArray() { 1081 int N = readInt(); 1082 if (N >= 0) { 1083 String[] val = new String[N]; 1084 for (int i=0; i<N; i++) { 1085 val[i] = readString(); 1086 } 1087 return val; 1088 } else { 1089 return null; 1090 } 1091 } 1092 1093 public final void readStringArray(String[] val) { 1094 int N = readInt(); 1095 if (N == val.length) { 1096 for (int i=0; i<N; i++) { 1097 val[i] = readString(); 1098 } 1099 } else { 1100 throw new RuntimeException("bad array lengths"); 1101 } 1102 } 1103 1104 public final void writeBinderArray(IBinder[] val) { 1105 if (val != null) { 1106 int N = val.length; 1107 writeInt(N); 1108 for (int i=0; i<N; i++) { 1109 writeStrongBinder(val[i]); 1110 } 1111 } else { 1112 writeInt(-1); 1113 } 1114 } 1115 1116 /** 1117 * @hide 1118 */ 1119 public final void writeCharSequenceArray(CharSequence[] val) { 1120 if (val != null) { 1121 int N = val.length; 1122 writeInt(N); 1123 for (int i=0; i<N; i++) { 1124 writeCharSequence(val[i]); 1125 } 1126 } else { 1127 writeInt(-1); 1128 } 1129 } 1130 1131 /** 1132 * @hide 1133 */ 1134 public final void writeCharSequenceList(ArrayList<CharSequence> val) { 1135 if (val != null) { 1136 int N = val.size(); 1137 writeInt(N); 1138 for (int i=0; i<N; i++) { 1139 writeCharSequence(val.get(i)); 1140 } 1141 } else { 1142 writeInt(-1); 1143 } 1144 } 1145 1146 public final IBinder[] createBinderArray() { 1147 int N = readInt(); 1148 if (N >= 0) { 1149 IBinder[] val = new IBinder[N]; 1150 for (int i=0; i<N; i++) { 1151 val[i] = readStrongBinder(); 1152 } 1153 return val; 1154 } else { 1155 return null; 1156 } 1157 } 1158 1159 public final void readBinderArray(IBinder[] val) { 1160 int N = readInt(); 1161 if (N == val.length) { 1162 for (int i=0; i<N; i++) { 1163 val[i] = readStrongBinder(); 1164 } 1165 } else { 1166 throw new RuntimeException("bad array lengths"); 1167 } 1168 } 1169 1170 /** 1171 * Flatten a List containing a particular object type into the parcel, at 1172 * the current dataPosition() and growing dataCapacity() if needed. The 1173 * type of the objects in the list must be one that implements Parcelable. 1174 * Unlike the generic writeList() method, however, only the raw data of the 1175 * objects is written and not their type, so you must use the corresponding 1176 * readTypedList() to unmarshall them. 1177 * 1178 * @param val The list of objects to be written. 1179 * 1180 * @see #createTypedArrayList 1181 * @see #readTypedList 1182 * @see Parcelable 1183 */ 1184 public final <T extends Parcelable> void writeTypedList(List<T> val) { 1185 if (val == null) { 1186 writeInt(-1); 1187 return; 1188 } 1189 int N = val.size(); 1190 int i=0; 1191 writeInt(N); 1192 while (i < N) { 1193 T item = val.get(i); 1194 if (item != null) { 1195 writeInt(1); 1196 item.writeToParcel(this, 0); 1197 } else { 1198 writeInt(0); 1199 } 1200 i++; 1201 } 1202 } 1203 1204 /** 1205 * Flatten a List containing String objects into the parcel, at 1206 * the current dataPosition() and growing dataCapacity() if needed. They 1207 * can later be retrieved with {@link #createStringArrayList} or 1208 * {@link #readStringList}. 1209 * 1210 * @param val The list of strings to be written. 1211 * 1212 * @see #createStringArrayList 1213 * @see #readStringList 1214 */ 1215 public final void writeStringList(List<String> val) { 1216 if (val == null) { 1217 writeInt(-1); 1218 return; 1219 } 1220 int N = val.size(); 1221 int i=0; 1222 writeInt(N); 1223 while (i < N) { 1224 writeString(val.get(i)); 1225 i++; 1226 } 1227 } 1228 1229 /** 1230 * Flatten a List containing IBinder objects into the parcel, at 1231 * the current dataPosition() and growing dataCapacity() if needed. They 1232 * can later be retrieved with {@link #createBinderArrayList} or 1233 * {@link #readBinderList}. 1234 * 1235 * @param val The list of strings to be written. 1236 * 1237 * @see #createBinderArrayList 1238 * @see #readBinderList 1239 */ 1240 public final void writeBinderList(List<IBinder> val) { 1241 if (val == null) { 1242 writeInt(-1); 1243 return; 1244 } 1245 int N = val.size(); 1246 int i=0; 1247 writeInt(N); 1248 while (i < N) { 1249 writeStrongBinder(val.get(i)); 1250 i++; 1251 } 1252 } 1253 1254 /** 1255 * Flatten a heterogeneous array containing a particular object type into 1256 * the parcel, at 1257 * the current dataPosition() and growing dataCapacity() if needed. The 1258 * type of the objects in the array must be one that implements Parcelable. 1259 * Unlike the {@link #writeParcelableArray} method, however, only the 1260 * raw data of the objects is written and not their type, so you must use 1261 * {@link #readTypedArray} with the correct corresponding 1262 * {@link Parcelable.Creator} implementation to unmarshall them. 1263 * 1264 * @param val The array of objects to be written. 1265 * @param parcelableFlags Contextual flags as per 1266 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1267 * 1268 * @see #readTypedArray 1269 * @see #writeParcelableArray 1270 * @see Parcelable.Creator 1271 */ 1272 public final <T extends Parcelable> void writeTypedArray(T[] val, 1273 int parcelableFlags) { 1274 if (val != null) { 1275 int N = val.length; 1276 writeInt(N); 1277 for (int i=0; i<N; i++) { 1278 T item = val[i]; 1279 if (item != null) { 1280 writeInt(1); 1281 item.writeToParcel(this, parcelableFlags); 1282 } else { 1283 writeInt(0); 1284 } 1285 } 1286 } else { 1287 writeInt(-1); 1288 } 1289 } 1290 1291 /** 1292 * Flatten the Parcelable object into the parcel. 1293 * 1294 * @param val The Parcelable object to be written. 1295 * @param parcelableFlags Contextual flags as per 1296 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1297 * 1298 * @see #readTypedObject 1299 */ 1300 public final <T extends Parcelable> void writeTypedObject(T val, int parcelableFlags) { 1301 if (val != null) { 1302 writeInt(1); 1303 val.writeToParcel(this, parcelableFlags); 1304 } else { 1305 writeInt(0); 1306 } 1307 } 1308 1309 /** 1310 * Flatten a generic object in to a parcel. The given Object value may 1311 * currently be one of the following types: 1312 * 1313 * <ul> 1314 * <li> null 1315 * <li> String 1316 * <li> Byte 1317 * <li> Short 1318 * <li> Integer 1319 * <li> Long 1320 * <li> Float 1321 * <li> Double 1322 * <li> Boolean 1323 * <li> String[] 1324 * <li> boolean[] 1325 * <li> byte[] 1326 * <li> int[] 1327 * <li> long[] 1328 * <li> Object[] (supporting objects of the same type defined here). 1329 * <li> {@link Bundle} 1330 * <li> Map (as supported by {@link #writeMap}). 1331 * <li> Any object that implements the {@link Parcelable} protocol. 1332 * <li> Parcelable[] 1333 * <li> CharSequence (as supported by {@link TextUtils#writeToParcel}). 1334 * <li> List (as supported by {@link #writeList}). 1335 * <li> {@link SparseArray} (as supported by {@link #writeSparseArray(SparseArray)}). 1336 * <li> {@link IBinder} 1337 * <li> Any object that implements Serializable (but see 1338 * {@link #writeSerializable} for caveats). Note that all of the 1339 * previous types have relatively efficient implementations for 1340 * writing to a Parcel; having to rely on the generic serialization 1341 * approach is much less efficient and should be avoided whenever 1342 * possible. 1343 * </ul> 1344 * 1345 * <p class="caution">{@link Parcelable} objects are written with 1346 * {@link Parcelable#writeToParcel} using contextual flags of 0. When 1347 * serializing objects containing {@link ParcelFileDescriptor}s, 1348 * this may result in file descriptor leaks when they are returned from 1349 * Binder calls (where {@link Parcelable#PARCELABLE_WRITE_RETURN_VALUE} 1350 * should be used).</p> 1351 */ 1352 public final void writeValue(Object v) { 1353 if (v == null) { 1354 writeInt(VAL_NULL); 1355 } else if (v instanceof String) { 1356 writeInt(VAL_STRING); 1357 writeString((String) v); 1358 } else if (v instanceof Integer) { 1359 writeInt(VAL_INTEGER); 1360 writeInt((Integer) v); 1361 } else if (v instanceof Map) { 1362 writeInt(VAL_MAP); 1363 writeMap((Map) v); 1364 } else if (v instanceof Bundle) { 1365 // Must be before Parcelable 1366 writeInt(VAL_BUNDLE); 1367 writeBundle((Bundle) v); 1368 } else if (v instanceof Parcelable) { 1369 writeInt(VAL_PARCELABLE); 1370 writeParcelable((Parcelable) v, 0); 1371 } else if (v instanceof Short) { 1372 writeInt(VAL_SHORT); 1373 writeInt(((Short) v).intValue()); 1374 } else if (v instanceof Long) { 1375 writeInt(VAL_LONG); 1376 writeLong((Long) v); 1377 } else if (v instanceof Float) { 1378 writeInt(VAL_FLOAT); 1379 writeFloat((Float) v); 1380 } else if (v instanceof Double) { 1381 writeInt(VAL_DOUBLE); 1382 writeDouble((Double) v); 1383 } else if (v instanceof Boolean) { 1384 writeInt(VAL_BOOLEAN); 1385 writeInt((Boolean) v ? 1 : 0); 1386 } else if (v instanceof CharSequence) { 1387 // Must be after String 1388 writeInt(VAL_CHARSEQUENCE); 1389 writeCharSequence((CharSequence) v); 1390 } else if (v instanceof List) { 1391 writeInt(VAL_LIST); 1392 writeList((List) v); 1393 } else if (v instanceof SparseArray) { 1394 writeInt(VAL_SPARSEARRAY); 1395 writeSparseArray((SparseArray) v); 1396 } else if (v instanceof boolean[]) { 1397 writeInt(VAL_BOOLEANARRAY); 1398 writeBooleanArray((boolean[]) v); 1399 } else if (v instanceof byte[]) { 1400 writeInt(VAL_BYTEARRAY); 1401 writeByteArray((byte[]) v); 1402 } else if (v instanceof String[]) { 1403 writeInt(VAL_STRINGARRAY); 1404 writeStringArray((String[]) v); 1405 } else if (v instanceof CharSequence[]) { 1406 // Must be after String[] and before Object[] 1407 writeInt(VAL_CHARSEQUENCEARRAY); 1408 writeCharSequenceArray((CharSequence[]) v); 1409 } else if (v instanceof IBinder) { 1410 writeInt(VAL_IBINDER); 1411 writeStrongBinder((IBinder) v); 1412 } else if (v instanceof Parcelable[]) { 1413 writeInt(VAL_PARCELABLEARRAY); 1414 writeParcelableArray((Parcelable[]) v, 0); 1415 } else if (v instanceof int[]) { 1416 writeInt(VAL_INTARRAY); 1417 writeIntArray((int[]) v); 1418 } else if (v instanceof long[]) { 1419 writeInt(VAL_LONGARRAY); 1420 writeLongArray((long[]) v); 1421 } else if (v instanceof Byte) { 1422 writeInt(VAL_BYTE); 1423 writeInt((Byte) v); 1424 } else if (v instanceof PersistableBundle) { 1425 writeInt(VAL_PERSISTABLEBUNDLE); 1426 writePersistableBundle((PersistableBundle) v); 1427 } else if (v instanceof Size) { 1428 writeInt(VAL_SIZE); 1429 writeSize((Size) v); 1430 } else if (v instanceof SizeF) { 1431 writeInt(VAL_SIZEF); 1432 writeSizeF((SizeF) v); 1433 } else if (v instanceof double[]) { 1434 writeInt(VAL_DOUBLEARRAY); 1435 writeDoubleArray((double[]) v); 1436 } else { 1437 Class<?> clazz = v.getClass(); 1438 if (clazz.isArray() && clazz.getComponentType() == Object.class) { 1439 // Only pure Object[] are written here, Other arrays of non-primitive types are 1440 // handled by serialization as this does not record the component type. 1441 writeInt(VAL_OBJECTARRAY); 1442 writeArray((Object[]) v); 1443 } else if (v instanceof Serializable) { 1444 // Must be last 1445 writeInt(VAL_SERIALIZABLE); 1446 writeSerializable((Serializable) v); 1447 } else { 1448 throw new RuntimeException("Parcel: unable to marshal value " + v); 1449 } 1450 } 1451 } 1452 1453 /** 1454 * Flatten the name of the class of the Parcelable and its contents 1455 * into the parcel. 1456 * 1457 * @param p The Parcelable object to be written. 1458 * @param parcelableFlags Contextual flags as per 1459 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 1460 */ 1461 public final void writeParcelable(Parcelable p, int parcelableFlags) { 1462 if (p == null) { 1463 writeString(null); 1464 return; 1465 } 1466 writeParcelableCreator(p); 1467 p.writeToParcel(this, parcelableFlags); 1468 } 1469 1470 /** @hide */ 1471 public final void writeParcelableCreator(Parcelable p) { 1472 String name = p.getClass().getName(); 1473 writeString(name); 1474 } 1475 1476 /** 1477 * Write a generic serializable object in to a Parcel. It is strongly 1478 * recommended that this method be avoided, since the serialization 1479 * overhead is extremely large, and this approach will be much slower than 1480 * using the other approaches to writing data in to a Parcel. 1481 */ 1482 public final void writeSerializable(Serializable s) { 1483 if (s == null) { 1484 writeString(null); 1485 return; 1486 } 1487 String name = s.getClass().getName(); 1488 writeString(name); 1489 1490 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 1491 try { 1492 ObjectOutputStream oos = new ObjectOutputStream(baos); 1493 oos.writeObject(s); 1494 oos.close(); 1495 1496 writeByteArray(baos.toByteArray()); 1497 } catch (IOException ioe) { 1498 throw new RuntimeException("Parcelable encountered " + 1499 "IOException writing serializable object (name = " + name + 1500 ")", ioe); 1501 } 1502 } 1503 1504 /** 1505 * Special function for writing an exception result at the header of 1506 * a parcel, to be used when returning an exception from a transaction. 1507 * Note that this currently only supports a few exception types; any other 1508 * exception will be re-thrown by this function as a RuntimeException 1509 * (to be caught by the system's last-resort exception handling when 1510 * dispatching a transaction). 1511 * 1512 * <p>The supported exception types are: 1513 * <ul> 1514 * <li>{@link BadParcelableException} 1515 * <li>{@link IllegalArgumentException} 1516 * <li>{@link IllegalStateException} 1517 * <li>{@link NullPointerException} 1518 * <li>{@link SecurityException} 1519 * <li>{@link NetworkOnMainThreadException} 1520 * </ul> 1521 * 1522 * @param e The Exception to be written. 1523 * 1524 * @see #writeNoException 1525 * @see #readException 1526 */ 1527 public final void writeException(Exception e) { 1528 int code = 0; 1529 if (e instanceof SecurityException) { 1530 code = EX_SECURITY; 1531 } else if (e instanceof BadParcelableException) { 1532 code = EX_BAD_PARCELABLE; 1533 } else if (e instanceof IllegalArgumentException) { 1534 code = EX_ILLEGAL_ARGUMENT; 1535 } else if (e instanceof NullPointerException) { 1536 code = EX_NULL_POINTER; 1537 } else if (e instanceof IllegalStateException) { 1538 code = EX_ILLEGAL_STATE; 1539 } else if (e instanceof NetworkOnMainThreadException) { 1540 code = EX_NETWORK_MAIN_THREAD; 1541 } else if (e instanceof UnsupportedOperationException) { 1542 code = EX_UNSUPPORTED_OPERATION; 1543 } 1544 writeInt(code); 1545 StrictMode.clearGatheredViolations(); 1546 if (code == 0) { 1547 if (e instanceof RuntimeException) { 1548 throw (RuntimeException) e; 1549 } 1550 throw new RuntimeException(e); 1551 } 1552 writeString(e.getMessage()); 1553 } 1554 1555 /** 1556 * Special function for writing information at the front of the Parcel 1557 * indicating that no exception occurred. 1558 * 1559 * @see #writeException 1560 * @see #readException 1561 */ 1562 public final void writeNoException() { 1563 // Despite the name of this function ("write no exception"), 1564 // it should instead be thought of as "write the RPC response 1565 // header", but because this function name is written out by 1566 // the AIDL compiler, we're not going to rename it. 1567 // 1568 // The response header, in the non-exception case (see also 1569 // writeException above, also called by the AIDL compiler), is 1570 // either a 0 (the default case), or EX_HAS_REPLY_HEADER if 1571 // StrictMode has gathered up violations that have occurred 1572 // during a Binder call, in which case we write out the number 1573 // of violations and their details, serialized, before the 1574 // actual RPC respons data. The receiving end of this is 1575 // readException(), below. 1576 if (StrictMode.hasGatheredViolations()) { 1577 writeInt(EX_HAS_REPLY_HEADER); 1578 final int sizePosition = dataPosition(); 1579 writeInt(0); // total size of fat header, to be filled in later 1580 StrictMode.writeGatheredViolationsToParcel(this); 1581 final int payloadPosition = dataPosition(); 1582 setDataPosition(sizePosition); 1583 writeInt(payloadPosition - sizePosition); // header size 1584 setDataPosition(payloadPosition); 1585 } else { 1586 writeInt(0); 1587 } 1588 } 1589 1590 /** 1591 * Special function for reading an exception result from the header of 1592 * a parcel, to be used after receiving the result of a transaction. This 1593 * will throw the exception for you if it had been written to the Parcel, 1594 * otherwise return and let you read the normal result data from the Parcel. 1595 * 1596 * @see #writeException 1597 * @see #writeNoException 1598 */ 1599 public final void readException() { 1600 int code = readExceptionCode(); 1601 if (code != 0) { 1602 String msg = readString(); 1603 readException(code, msg); 1604 } 1605 } 1606 1607 /** 1608 * Parses the header of a Binder call's response Parcel and 1609 * returns the exception code. Deals with lite or fat headers. 1610 * In the common successful case, this header is generally zero. 1611 * In less common cases, it's a small negative number and will be 1612 * followed by an error string. 1613 * 1614 * This exists purely for android.database.DatabaseUtils and 1615 * insulating it from having to handle fat headers as returned by 1616 * e.g. StrictMode-induced RPC responses. 1617 * 1618 * @hide 1619 */ 1620 public final int readExceptionCode() { 1621 int code = readInt(); 1622 if (code == EX_HAS_REPLY_HEADER) { 1623 int headerSize = readInt(); 1624 if (headerSize == 0) { 1625 Log.e(TAG, "Unexpected zero-sized Parcel reply header."); 1626 } else { 1627 // Currently the only thing in the header is StrictMode stacks, 1628 // but discussions around event/RPC tracing suggest we might 1629 // put that here too. If so, switch on sub-header tags here. 1630 // But for now, just parse out the StrictMode stuff. 1631 StrictMode.readAndHandleBinderCallViolations(this); 1632 } 1633 // And fat response headers are currently only used when 1634 // there are no exceptions, so return no error: 1635 return 0; 1636 } 1637 return code; 1638 } 1639 1640 /** 1641 * Throw an exception with the given message. Not intended for use 1642 * outside the Parcel class. 1643 * 1644 * @param code Used to determine which exception class to throw. 1645 * @param msg The exception message. 1646 */ 1647 public final void readException(int code, String msg) { 1648 switch (code) { 1649 case EX_SECURITY: 1650 throw new SecurityException(msg); 1651 case EX_BAD_PARCELABLE: 1652 throw new BadParcelableException(msg); 1653 case EX_ILLEGAL_ARGUMENT: 1654 throw new IllegalArgumentException(msg); 1655 case EX_NULL_POINTER: 1656 throw new NullPointerException(msg); 1657 case EX_ILLEGAL_STATE: 1658 throw new IllegalStateException(msg); 1659 case EX_NETWORK_MAIN_THREAD: 1660 throw new NetworkOnMainThreadException(); 1661 case EX_UNSUPPORTED_OPERATION: 1662 throw new UnsupportedOperationException(msg); 1663 } 1664 throw new RuntimeException("Unknown exception code: " + code 1665 + " msg " + msg); 1666 } 1667 1668 /** 1669 * Read an integer value from the parcel at the current dataPosition(). 1670 */ 1671 public final int readInt() { 1672 return nativeReadInt(mNativePtr); 1673 } 1674 1675 /** 1676 * Read a long integer value from the parcel at the current dataPosition(). 1677 */ 1678 public final long readLong() { 1679 return nativeReadLong(mNativePtr); 1680 } 1681 1682 /** 1683 * Read a floating point value from the parcel at the current 1684 * dataPosition(). 1685 */ 1686 public final float readFloat() { 1687 return nativeReadFloat(mNativePtr); 1688 } 1689 1690 /** 1691 * Read a double precision floating point value from the parcel at the 1692 * current dataPosition(). 1693 */ 1694 public final double readDouble() { 1695 return nativeReadDouble(mNativePtr); 1696 } 1697 1698 /** 1699 * Read a string value from the parcel at the current dataPosition(). 1700 */ 1701 public final String readString() { 1702 return nativeReadString(mNativePtr); 1703 } 1704 1705 /** 1706 * Read a CharSequence value from the parcel at the current dataPosition(). 1707 * @hide 1708 */ 1709 public final CharSequence readCharSequence() { 1710 return TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(this); 1711 } 1712 1713 /** 1714 * Read an object from the parcel at the current dataPosition(). 1715 */ 1716 public final IBinder readStrongBinder() { 1717 return nativeReadStrongBinder(mNativePtr); 1718 } 1719 1720 /** 1721 * Read a FileDescriptor from the parcel at the current dataPosition(). 1722 */ 1723 public final ParcelFileDescriptor readFileDescriptor() { 1724 FileDescriptor fd = nativeReadFileDescriptor(mNativePtr); 1725 return fd != null ? new ParcelFileDescriptor(fd) : null; 1726 } 1727 1728 /** {@hide} */ 1729 public final FileDescriptor readRawFileDescriptor() { 1730 return nativeReadFileDescriptor(mNativePtr); 1731 } 1732 1733 /** 1734 * {@hide} 1735 * Read and return a new array of FileDescriptors from the parcel. 1736 * @return the FileDescriptor array, or null if the array is null. 1737 **/ 1738 public final FileDescriptor[] createRawFileDescriptorArray() { 1739 int N = readInt(); 1740 if (N < 0) { 1741 return null; 1742 } 1743 FileDescriptor[] f = new FileDescriptor[N]; 1744 for (int i = 0; i < N; i++) { 1745 f[i] = readRawFileDescriptor(); 1746 } 1747 return f; 1748 } 1749 1750 /** 1751 * {@hide} 1752 * Read an array of FileDescriptors from a parcel. 1753 * The passed array must be exactly the length of the array in the parcel. 1754 * @return the FileDescriptor array, or null if the array is null. 1755 **/ 1756 public final void readRawFileDescriptorArray(FileDescriptor[] val) { 1757 int N = readInt(); 1758 if (N == val.length) { 1759 for (int i=0; i<N; i++) { 1760 val[i] = readRawFileDescriptor(); 1761 } 1762 } else { 1763 throw new RuntimeException("bad array lengths"); 1764 } 1765 } 1766 1767 1768 /*package*/ static native FileDescriptor openFileDescriptor(String file, 1769 int mode) throws FileNotFoundException; 1770 /*package*/ static native FileDescriptor dupFileDescriptor(FileDescriptor orig) 1771 throws IOException; 1772 /*package*/ static native void closeFileDescriptor(FileDescriptor desc) 1773 throws IOException; 1774 /*package*/ static native void clearFileDescriptor(FileDescriptor desc); 1775 1776 /** 1777 * Read a byte value from the parcel at the current dataPosition(). 1778 */ 1779 public final byte readByte() { 1780 return (byte)(readInt() & 0xff); 1781 } 1782 1783 /** 1784 * Please use {@link #readBundle(ClassLoader)} instead (whose data must have 1785 * been written with {@link #writeBundle}. Read into an existing Map object 1786 * from the parcel at the current dataPosition(). 1787 */ 1788 public final void readMap(Map outVal, ClassLoader loader) { 1789 int N = readInt(); 1790 readMapInternal(outVal, N, loader); 1791 } 1792 1793 /** 1794 * Read into an existing List object from the parcel at the current 1795 * dataPosition(), using the given class loader to load any enclosed 1796 * Parcelables. If it is null, the default class loader is used. 1797 */ 1798 public final void readList(List outVal, ClassLoader loader) { 1799 int N = readInt(); 1800 readListInternal(outVal, N, loader); 1801 } 1802 1803 /** 1804 * Please use {@link #readBundle(ClassLoader)} instead (whose data must have 1805 * been written with {@link #writeBundle}. Read and return a new HashMap 1806 * object from the parcel at the current dataPosition(), using the given 1807 * class loader to load any enclosed Parcelables. Returns null if 1808 * the previously written map object was null. 1809 */ 1810 public final HashMap readHashMap(ClassLoader loader) 1811 { 1812 int N = readInt(); 1813 if (N < 0) { 1814 return null; 1815 } 1816 HashMap m = new HashMap(N); 1817 readMapInternal(m, N, loader); 1818 return m; 1819 } 1820 1821 /** 1822 * Read and return a new Bundle object from the parcel at the current 1823 * dataPosition(). Returns null if the previously written Bundle object was 1824 * null. 1825 */ 1826 public final Bundle readBundle() { 1827 return readBundle(null); 1828 } 1829 1830 /** 1831 * Read and return a new Bundle object from the parcel at the current 1832 * dataPosition(), using the given class loader to initialize the class 1833 * loader of the Bundle for later retrieval of Parcelable objects. 1834 * Returns null if the previously written Bundle object was null. 1835 */ 1836 public final Bundle readBundle(ClassLoader loader) { 1837 int length = readInt(); 1838 if (length < 0) { 1839 if (Bundle.DEBUG) Log.d(TAG, "null bundle: length=" + length); 1840 return null; 1841 } 1842 1843 final Bundle bundle = new Bundle(this, length); 1844 if (loader != null) { 1845 bundle.setClassLoader(loader); 1846 } 1847 return bundle; 1848 } 1849 1850 /** 1851 * Read and return a new Bundle object from the parcel at the current 1852 * dataPosition(). Returns null if the previously written Bundle object was 1853 * null. 1854 */ 1855 public final PersistableBundle readPersistableBundle() { 1856 return readPersistableBundle(null); 1857 } 1858 1859 /** 1860 * Read and return a new Bundle object from the parcel at the current 1861 * dataPosition(), using the given class loader to initialize the class 1862 * loader of the Bundle for later retrieval of Parcelable objects. 1863 * Returns null if the previously written Bundle object was null. 1864 */ 1865 public final PersistableBundle readPersistableBundle(ClassLoader loader) { 1866 int length = readInt(); 1867 if (length < 0) { 1868 if (Bundle.DEBUG) Log.d(TAG, "null bundle: length=" + length); 1869 return null; 1870 } 1871 1872 final PersistableBundle bundle = new PersistableBundle(this, length); 1873 if (loader != null) { 1874 bundle.setClassLoader(loader); 1875 } 1876 return bundle; 1877 } 1878 1879 /** 1880 * Read a Size from the parcel at the current dataPosition(). 1881 */ 1882 public final Size readSize() { 1883 final int width = readInt(); 1884 final int height = readInt(); 1885 return new Size(width, height); 1886 } 1887 1888 /** 1889 * Read a SizeF from the parcel at the current dataPosition(). 1890 */ 1891 public final SizeF readSizeF() { 1892 final float width = readFloat(); 1893 final float height = readFloat(); 1894 return new SizeF(width, height); 1895 } 1896 1897 /** 1898 * Read and return a byte[] object from the parcel. 1899 */ 1900 public final byte[] createByteArray() { 1901 return nativeCreateByteArray(mNativePtr); 1902 } 1903 1904 /** 1905 * Read a byte[] object from the parcel and copy it into the 1906 * given byte array. 1907 */ 1908 public final void readByteArray(byte[] val) { 1909 // TODO: make this a native method to avoid the extra copy. 1910 byte[] ba = createByteArray(); 1911 if (ba.length == val.length) { 1912 System.arraycopy(ba, 0, val, 0, ba.length); 1913 } else { 1914 throw new RuntimeException("bad array lengths"); 1915 } 1916 } 1917 1918 /** 1919 * Read a blob of data from the parcel and return it as a byte array. 1920 * {@hide} 1921 * {@SystemApi} 1922 */ 1923 public final byte[] readBlob() { 1924 return nativeReadBlob(mNativePtr); 1925 } 1926 1927 /** 1928 * Read and return a String[] object from the parcel. 1929 * {@hide} 1930 */ 1931 public final String[] readStringArray() { 1932 String[] array = null; 1933 1934 int length = readInt(); 1935 if (length >= 0) 1936 { 1937 array = new String[length]; 1938 1939 for (int i = 0 ; i < length ; i++) 1940 { 1941 array[i] = readString(); 1942 } 1943 } 1944 1945 return array; 1946 } 1947 1948 /** 1949 * Read and return a CharSequence[] object from the parcel. 1950 * {@hide} 1951 */ 1952 public final CharSequence[] readCharSequenceArray() { 1953 CharSequence[] array = null; 1954 1955 int length = readInt(); 1956 if (length >= 0) 1957 { 1958 array = new CharSequence[length]; 1959 1960 for (int i = 0 ; i < length ; i++) 1961 { 1962 array[i] = readCharSequence(); 1963 } 1964 } 1965 1966 return array; 1967 } 1968 1969 /** 1970 * Read and return an ArrayList<CharSequence> object from the parcel. 1971 * {@hide} 1972 */ 1973 public final ArrayList<CharSequence> readCharSequenceList() { 1974 ArrayList<CharSequence> array = null; 1975 1976 int length = readInt(); 1977 if (length >= 0) { 1978 array = new ArrayList<CharSequence>(length); 1979 1980 for (int i = 0 ; i < length ; i++) { 1981 array.add(readCharSequence()); 1982 } 1983 } 1984 1985 return array; 1986 } 1987 1988 /** 1989 * Read and return a new ArrayList object from the parcel at the current 1990 * dataPosition(). Returns null if the previously written list object was 1991 * null. The given class loader will be used to load any enclosed 1992 * Parcelables. 1993 */ 1994 public final ArrayList readArrayList(ClassLoader loader) { 1995 int N = readInt(); 1996 if (N < 0) { 1997 return null; 1998 } 1999 ArrayList l = new ArrayList(N); 2000 readListInternal(l, N, loader); 2001 return l; 2002 } 2003 2004 /** 2005 * Read and return a new Object array from the parcel at the current 2006 * dataPosition(). Returns null if the previously written array was 2007 * null. The given class loader will be used to load any enclosed 2008 * Parcelables. 2009 */ 2010 public final Object[] readArray(ClassLoader loader) { 2011 int N = readInt(); 2012 if (N < 0) { 2013 return null; 2014 } 2015 Object[] l = new Object[N]; 2016 readArrayInternal(l, N, loader); 2017 return l; 2018 } 2019 2020 /** 2021 * Read and return a new SparseArray object from the parcel at the current 2022 * dataPosition(). Returns null if the previously written list object was 2023 * null. The given class loader will be used to load any enclosed 2024 * Parcelables. 2025 */ 2026 public final SparseArray readSparseArray(ClassLoader loader) { 2027 int N = readInt(); 2028 if (N < 0) { 2029 return null; 2030 } 2031 SparseArray sa = new SparseArray(N); 2032 readSparseArrayInternal(sa, N, loader); 2033 return sa; 2034 } 2035 2036 /** 2037 * Read and return a new SparseBooleanArray object from the parcel at the current 2038 * dataPosition(). Returns null if the previously written list object was 2039 * null. 2040 */ 2041 public final SparseBooleanArray readSparseBooleanArray() { 2042 int N = readInt(); 2043 if (N < 0) { 2044 return null; 2045 } 2046 SparseBooleanArray sa = new SparseBooleanArray(N); 2047 readSparseBooleanArrayInternal(sa, N); 2048 return sa; 2049 } 2050 2051 /** 2052 * Read and return a new ArrayList containing a particular object type from 2053 * the parcel that was written with {@link #writeTypedList} at the 2054 * current dataPosition(). Returns null if the 2055 * previously written list object was null. The list <em>must</em> have 2056 * previously been written via {@link #writeTypedList} with the same object 2057 * type. 2058 * 2059 * @return A newly created ArrayList containing objects with the same data 2060 * as those that were previously written. 2061 * 2062 * @see #writeTypedList 2063 */ 2064 public final <T> ArrayList<T> createTypedArrayList(Parcelable.Creator<T> c) { 2065 int N = readInt(); 2066 if (N < 0) { 2067 return null; 2068 } 2069 ArrayList<T> l = new ArrayList<T>(N); 2070 while (N > 0) { 2071 if (readInt() != 0) { 2072 l.add(c.createFromParcel(this)); 2073 } else { 2074 l.add(null); 2075 } 2076 N--; 2077 } 2078 return l; 2079 } 2080 2081 /** 2082 * Read into the given List items containing a particular object type 2083 * that were written with {@link #writeTypedList} at the 2084 * current dataPosition(). The list <em>must</em> have 2085 * previously been written via {@link #writeTypedList} with the same object 2086 * type. 2087 * 2088 * @return A newly created ArrayList containing objects with the same data 2089 * as those that were previously written. 2090 * 2091 * @see #writeTypedList 2092 */ 2093 public final <T> void readTypedList(List<T> list, Parcelable.Creator<T> c) { 2094 int M = list.size(); 2095 int N = readInt(); 2096 int i = 0; 2097 for (; i < M && i < N; i++) { 2098 if (readInt() != 0) { 2099 list.set(i, c.createFromParcel(this)); 2100 } else { 2101 list.set(i, null); 2102 } 2103 } 2104 for (; i<N; i++) { 2105 if (readInt() != 0) { 2106 list.add(c.createFromParcel(this)); 2107 } else { 2108 list.add(null); 2109 } 2110 } 2111 for (; i<M; i++) { 2112 list.remove(N); 2113 } 2114 } 2115 2116 /** 2117 * Read and return a new ArrayList containing String objects from 2118 * the parcel that was written with {@link #writeStringList} at the 2119 * current dataPosition(). Returns null if the 2120 * previously written list object was null. 2121 * 2122 * @return A newly created ArrayList containing strings with the same data 2123 * as those that were previously written. 2124 * 2125 * @see #writeStringList 2126 */ 2127 public final ArrayList<String> createStringArrayList() { 2128 int N = readInt(); 2129 if (N < 0) { 2130 return null; 2131 } 2132 ArrayList<String> l = new ArrayList<String>(N); 2133 while (N > 0) { 2134 l.add(readString()); 2135 N--; 2136 } 2137 return l; 2138 } 2139 2140 /** 2141 * Read and return a new ArrayList containing IBinder objects from 2142 * the parcel that was written with {@link #writeBinderList} at the 2143 * current dataPosition(). Returns null if the 2144 * previously written list object was null. 2145 * 2146 * @return A newly created ArrayList containing strings with the same data 2147 * as those that were previously written. 2148 * 2149 * @see #writeBinderList 2150 */ 2151 public final ArrayList<IBinder> createBinderArrayList() { 2152 int N = readInt(); 2153 if (N < 0) { 2154 return null; 2155 } 2156 ArrayList<IBinder> l = new ArrayList<IBinder>(N); 2157 while (N > 0) { 2158 l.add(readStrongBinder()); 2159 N--; 2160 } 2161 return l; 2162 } 2163 2164 /** 2165 * Read into the given List items String objects that were written with 2166 * {@link #writeStringList} at the current dataPosition(). 2167 * 2168 * @return A newly created ArrayList containing strings with the same data 2169 * as those that were previously written. 2170 * 2171 * @see #writeStringList 2172 */ 2173 public final void readStringList(List<String> list) { 2174 int M = list.size(); 2175 int N = readInt(); 2176 int i = 0; 2177 for (; i < M && i < N; i++) { 2178 list.set(i, readString()); 2179 } 2180 for (; i<N; i++) { 2181 list.add(readString()); 2182 } 2183 for (; i<M; i++) { 2184 list.remove(N); 2185 } 2186 } 2187 2188 /** 2189 * Read into the given List items IBinder objects that were written with 2190 * {@link #writeBinderList} at the current dataPosition(). 2191 * 2192 * @return A newly created ArrayList containing strings with the same data 2193 * as those that were previously written. 2194 * 2195 * @see #writeBinderList 2196 */ 2197 public final void readBinderList(List<IBinder> list) { 2198 int M = list.size(); 2199 int N = readInt(); 2200 int i = 0; 2201 for (; i < M && i < N; i++) { 2202 list.set(i, readStrongBinder()); 2203 } 2204 for (; i<N; i++) { 2205 list.add(readStrongBinder()); 2206 } 2207 for (; i<M; i++) { 2208 list.remove(N); 2209 } 2210 } 2211 2212 /** 2213 * Read and return a new array containing a particular object type from 2214 * the parcel at the current dataPosition(). Returns null if the 2215 * previously written array was null. The array <em>must</em> have 2216 * previously been written via {@link #writeTypedArray} with the same 2217 * object type. 2218 * 2219 * @return A newly created array containing objects with the same data 2220 * as those that were previously written. 2221 * 2222 * @see #writeTypedArray 2223 */ 2224 public final <T> T[] createTypedArray(Parcelable.Creator<T> c) { 2225 int N = readInt(); 2226 if (N < 0) { 2227 return null; 2228 } 2229 T[] l = c.newArray(N); 2230 for (int i=0; i<N; i++) { 2231 if (readInt() != 0) { 2232 l[i] = c.createFromParcel(this); 2233 } 2234 } 2235 return l; 2236 } 2237 2238 public final <T> void readTypedArray(T[] val, Parcelable.Creator<T> c) { 2239 int N = readInt(); 2240 if (N == val.length) { 2241 for (int i=0; i<N; i++) { 2242 if (readInt() != 0) { 2243 val[i] = c.createFromParcel(this); 2244 } else { 2245 val[i] = null; 2246 } 2247 } 2248 } else { 2249 throw new RuntimeException("bad array lengths"); 2250 } 2251 } 2252 2253 /** 2254 * @deprecated 2255 * @hide 2256 */ 2257 @Deprecated 2258 public final <T> T[] readTypedArray(Parcelable.Creator<T> c) { 2259 return createTypedArray(c); 2260 } 2261 2262 /** 2263 * Read and return a typed Parcelable object from a parcel. 2264 * Returns null if the previous written object was null. 2265 * The object <em>must</em> have previous been written via 2266 * {@link #writeTypedObject} with the same object type. 2267 * 2268 * @return A newly created object of the type that was previously 2269 * written. 2270 * 2271 * @see #writeTypedObject 2272 */ 2273 public final <T> T readTypedObject(Parcelable.Creator<T> c) { 2274 if (readInt() != 0) { 2275 return c.createFromParcel(this); 2276 } else { 2277 return null; 2278 } 2279 } 2280 2281 /** 2282 * Write a heterogeneous array of Parcelable objects into the Parcel. 2283 * Each object in the array is written along with its class name, so 2284 * that the correct class can later be instantiated. As a result, this 2285 * has significantly more overhead than {@link #writeTypedArray}, but will 2286 * correctly handle an array containing more than one type of object. 2287 * 2288 * @param value The array of objects to be written. 2289 * @param parcelableFlags Contextual flags as per 2290 * {@link Parcelable#writeToParcel(Parcel, int) Parcelable.writeToParcel()}. 2291 * 2292 * @see #writeTypedArray 2293 */ 2294 public final <T extends Parcelable> void writeParcelableArray(T[] value, 2295 int parcelableFlags) { 2296 if (value != null) { 2297 int N = value.length; 2298 writeInt(N); 2299 for (int i=0; i<N; i++) { 2300 writeParcelable(value[i], parcelableFlags); 2301 } 2302 } else { 2303 writeInt(-1); 2304 } 2305 } 2306 2307 /** 2308 * Read a typed object from a parcel. The given class loader will be 2309 * used to load any enclosed Parcelables. If it is null, the default class 2310 * loader will be used. 2311 */ 2312 public final Object readValue(ClassLoader loader) { 2313 int type = readInt(); 2314 2315 switch (type) { 2316 case VAL_NULL: 2317 return null; 2318 2319 case VAL_STRING: 2320 return readString(); 2321 2322 case VAL_INTEGER: 2323 return readInt(); 2324 2325 case VAL_MAP: 2326 return readHashMap(loader); 2327 2328 case VAL_PARCELABLE: 2329 return readParcelable(loader); 2330 2331 case VAL_SHORT: 2332 return (short) readInt(); 2333 2334 case VAL_LONG: 2335 return readLong(); 2336 2337 case VAL_FLOAT: 2338 return readFloat(); 2339 2340 case VAL_DOUBLE: 2341 return readDouble(); 2342 2343 case VAL_BOOLEAN: 2344 return readInt() == 1; 2345 2346 case VAL_CHARSEQUENCE: 2347 return readCharSequence(); 2348 2349 case VAL_LIST: 2350 return readArrayList(loader); 2351 2352 case VAL_BOOLEANARRAY: 2353 return createBooleanArray(); 2354 2355 case VAL_BYTEARRAY: 2356 return createByteArray(); 2357 2358 case VAL_STRINGARRAY: 2359 return readStringArray(); 2360 2361 case VAL_CHARSEQUENCEARRAY: 2362 return readCharSequenceArray(); 2363 2364 case VAL_IBINDER: 2365 return readStrongBinder(); 2366 2367 case VAL_OBJECTARRAY: 2368 return readArray(loader); 2369 2370 case VAL_INTARRAY: 2371 return createIntArray(); 2372 2373 case VAL_LONGARRAY: 2374 return createLongArray(); 2375 2376 case VAL_BYTE: 2377 return readByte(); 2378 2379 case VAL_SERIALIZABLE: 2380 return readSerializable(loader); 2381 2382 case VAL_PARCELABLEARRAY: 2383 return readParcelableArray(loader); 2384 2385 case VAL_SPARSEARRAY: 2386 return readSparseArray(loader); 2387 2388 case VAL_SPARSEBOOLEANARRAY: 2389 return readSparseBooleanArray(); 2390 2391 case VAL_BUNDLE: 2392 return readBundle(loader); // loading will be deferred 2393 2394 case VAL_PERSISTABLEBUNDLE: 2395 return readPersistableBundle(loader); 2396 2397 case VAL_SIZE: 2398 return readSize(); 2399 2400 case VAL_SIZEF: 2401 return readSizeF(); 2402 2403 case VAL_DOUBLEARRAY: 2404 return createDoubleArray(); 2405 2406 default: 2407 int off = dataPosition() - 4; 2408 throw new RuntimeException( 2409 "Parcel " + this + ": Unmarshalling unknown type code " + type + " at offset " + off); 2410 } 2411 } 2412 2413 /** 2414 * Read and return a new Parcelable from the parcel. The given class loader 2415 * will be used to load any enclosed Parcelables. If it is null, the default 2416 * class loader will be used. 2417 * @param loader A ClassLoader from which to instantiate the Parcelable 2418 * object, or null for the default class loader. 2419 * @return Returns the newly created Parcelable, or null if a null 2420 * object has been written. 2421 * @throws BadParcelableException Throws BadParcelableException if there 2422 * was an error trying to instantiate the Parcelable. 2423 */ 2424 @SuppressWarnings("unchecked") 2425 public final <T extends Parcelable> T readParcelable(ClassLoader loader) { 2426 Parcelable.Creator<?> creator = readParcelableCreator(loader); 2427 if (creator == null) { 2428 return null; 2429 } 2430 if (creator instanceof Parcelable.ClassLoaderCreator<?>) { 2431 Parcelable.ClassLoaderCreator<?> classLoaderCreator = 2432 (Parcelable.ClassLoaderCreator<?>) creator; 2433 return (T) classLoaderCreator.createFromParcel(this, loader); 2434 } 2435 return (T) creator.createFromParcel(this); 2436 } 2437 2438 /** @hide */ 2439 @SuppressWarnings("unchecked") 2440 public final <T extends Parcelable> T readCreator(Parcelable.Creator<?> creator, 2441 ClassLoader loader) { 2442 if (creator instanceof Parcelable.ClassLoaderCreator<?>) { 2443 Parcelable.ClassLoaderCreator<?> classLoaderCreator = 2444 (Parcelable.ClassLoaderCreator<?>) creator; 2445 return (T) classLoaderCreator.createFromParcel(this, loader); 2446 } 2447 return (T) creator.createFromParcel(this); 2448 } 2449 2450 /** @hide */ 2451 public final Parcelable.Creator<?> readParcelableCreator(ClassLoader loader) { 2452 String name = readString(); 2453 if (name == null) { 2454 return null; 2455 } 2456 Parcelable.Creator<?> creator; 2457 synchronized (mCreators) { 2458 HashMap<String,Parcelable.Creator<?>> map = mCreators.get(loader); 2459 if (map == null) { 2460 map = new HashMap<>(); 2461 mCreators.put(loader, map); 2462 } 2463 creator = map.get(name); 2464 if (creator == null) { 2465 try { 2466 // If loader == null, explicitly emulate Class.forName(String) "caller 2467 // classloader" behavior. 2468 ClassLoader parcelableClassLoader = 2469 (loader == null ? getClass().getClassLoader() : loader); 2470 // Avoid initializing the Parcelable class until we know it implements 2471 // Parcelable and has the necessary CREATOR field. http://b/1171613. 2472 Class<?> parcelableClass = Class.forName(name, false /* initialize */, 2473 parcelableClassLoader); 2474 if (!Parcelable.class.isAssignableFrom(parcelableClass)) { 2475 throw new BadParcelableException("Parcelable protocol requires that the " 2476 + "class implements Parcelable"); 2477 } 2478 Field f = parcelableClass.getField("CREATOR"); 2479 if ((f.getModifiers() & Modifier.STATIC) == 0) { 2480 throw new BadParcelableException("Parcelable protocol requires " 2481 + "the CREATOR object to be static on class " + name); 2482 } 2483 Class<?> creatorType = f.getType(); 2484 if (!Parcelable.Creator.class.isAssignableFrom(creatorType)) { 2485 // Fail before calling Field.get(), not after, to avoid initializing 2486 // parcelableClass unnecessarily. 2487 throw new BadParcelableException("Parcelable protocol requires a " 2488 + "Parcelable.Creator object called " 2489 + "CREATOR on class " + name); 2490 } 2491 creator = (Parcelable.Creator<?>) f.get(null); 2492 } 2493 catch (IllegalAccessException e) { 2494 Log.e(TAG, "Illegal access when unmarshalling: " + name, e); 2495 throw new BadParcelableException( 2496 "IllegalAccessException when unmarshalling: " + name); 2497 } 2498 catch (ClassNotFoundException e) { 2499 Log.e(TAG, "Class not found when unmarshalling: " + name, e); 2500 throw new BadParcelableException( 2501 "ClassNotFoundException when unmarshalling: " + name); 2502 } 2503 catch (NoSuchFieldException e) { 2504 throw new BadParcelableException("Parcelable protocol requires a " 2505 + "Parcelable.Creator object called " 2506 + "CREATOR on class " + name); 2507 } 2508 if (creator == null) { 2509 throw new BadParcelableException("Parcelable protocol requires a " 2510 + "non-null Parcelable.Creator object called " 2511 + "CREATOR on class " + name); 2512 } 2513 2514 map.put(name, creator); 2515 } 2516 } 2517 2518 return creator; 2519 } 2520 2521 /** 2522 * Read and return a new Parcelable array from the parcel. 2523 * The given class loader will be used to load any enclosed 2524 * Parcelables. 2525 * @return the Parcelable array, or null if the array is null 2526 */ 2527 public final Parcelable[] readParcelableArray(ClassLoader loader) { 2528 int N = readInt(); 2529 if (N < 0) { 2530 return null; 2531 } 2532 Parcelable[] p = new Parcelable[N]; 2533 for (int i = 0; i < N; i++) { 2534 p[i] = readParcelable(loader); 2535 } 2536 return p; 2537 } 2538 2539 /** 2540 * Read and return a new Serializable object from the parcel. 2541 * @return the Serializable object, or null if the Serializable name 2542 * wasn't found in the parcel. 2543 */ 2544 public final Serializable readSerializable() { 2545 return readSerializable(null); 2546 } 2547 2548 private final Serializable readSerializable(final ClassLoader loader) { 2549 String name = readString(); 2550 if (name == null) { 2551 // For some reason we were unable to read the name of the Serializable (either there 2552 // is nothing left in the Parcel to read, or the next value wasn't a String), so 2553 // return null, which indicates that the name wasn't found in the parcel. 2554 return null; 2555 } 2556 2557 byte[] serializedData = createByteArray(); 2558 ByteArrayInputStream bais = new ByteArrayInputStream(serializedData); 2559 try { 2560 ObjectInputStream ois = new ObjectInputStream(bais) { 2561 @Override 2562 protected Class<?> resolveClass(ObjectStreamClass osClass) 2563 throws IOException, ClassNotFoundException { 2564 // try the custom classloader if provided 2565 if (loader != null) { 2566 Class<?> c = Class.forName(osClass.getName(), false, loader); 2567 if (c != null) { 2568 return c; 2569 } 2570 } 2571 return super.resolveClass(osClass); 2572 } 2573 }; 2574 return (Serializable) ois.readObject(); 2575 } catch (IOException ioe) { 2576 throw new RuntimeException("Parcelable encountered " + 2577 "IOException reading a Serializable object (name = " + name + 2578 ")", ioe); 2579 } catch (ClassNotFoundException cnfe) { 2580 throw new RuntimeException("Parcelable encountered " + 2581 "ClassNotFoundException reading a Serializable object (name = " 2582 + name + ")", cnfe); 2583 } 2584 } 2585 2586 // Cache of previously looked up CREATOR.createFromParcel() methods for 2587 // particular classes. Keys are the names of the classes, values are 2588 // Method objects. 2589 private static final HashMap<ClassLoader,HashMap<String,Parcelable.Creator<?>>> 2590 mCreators = new HashMap<>(); 2591 2592 /** @hide for internal use only. */ 2593 static protected final Parcel obtain(int obj) { 2594 throw new UnsupportedOperationException(); 2595 } 2596 2597 /** @hide */ 2598 static protected final Parcel obtain(long obj) { 2599 final Parcel[] pool = sHolderPool; 2600 synchronized (pool) { 2601 Parcel p; 2602 for (int i=0; i<POOL_SIZE; i++) { 2603 p = pool[i]; 2604 if (p != null) { 2605 pool[i] = null; 2606 if (DEBUG_RECYCLE) { 2607 p.mStack = new RuntimeException(); 2608 } 2609 p.init(obj); 2610 return p; 2611 } 2612 } 2613 } 2614 return new Parcel(obj); 2615 } 2616 2617 private Parcel(long nativePtr) { 2618 if (DEBUG_RECYCLE) { 2619 mStack = new RuntimeException(); 2620 } 2621 //Log.i(TAG, "Initializing obj=0x" + Integer.toHexString(obj), mStack); 2622 init(nativePtr); 2623 } 2624 2625 private void init(long nativePtr) { 2626 if (nativePtr != 0) { 2627 mNativePtr = nativePtr; 2628 mOwnsNativeParcelObject = false; 2629 } else { 2630 mNativePtr = nativeCreate(); 2631 mOwnsNativeParcelObject = true; 2632 } 2633 } 2634 2635 private void freeBuffer() { 2636 if (mOwnsNativeParcelObject) { 2637 updateNativeSize(nativeFreeBuffer(mNativePtr)); 2638 } 2639 } 2640 2641 private void destroy() { 2642 if (mNativePtr != 0) { 2643 if (mOwnsNativeParcelObject) { 2644 nativeDestroy(mNativePtr); 2645 updateNativeSize(0); 2646 } 2647 mNativePtr = 0; 2648 } 2649 } 2650 2651 @Override 2652 protected void finalize() throws Throwable { 2653 if (DEBUG_RECYCLE) { 2654 if (mStack != null) { 2655 Log.w(TAG, "Client did not call Parcel.recycle()", mStack); 2656 } 2657 } 2658 destroy(); 2659 } 2660 2661 /* package */ void readMapInternal(Map outVal, int N, 2662 ClassLoader loader) { 2663 while (N > 0) { 2664 Object key = readValue(loader); 2665 Object value = readValue(loader); 2666 outVal.put(key, value); 2667 N--; 2668 } 2669 } 2670 2671 /* package */ void readArrayMapInternal(ArrayMap outVal, int N, 2672 ClassLoader loader) { 2673 if (DEBUG_ARRAY_MAP) { 2674 RuntimeException here = new RuntimeException("here"); 2675 here.fillInStackTrace(); 2676 Log.d(TAG, "Reading " + N + " ArrayMap entries", here); 2677 } 2678 int startPos; 2679 while (N > 0) { 2680 if (DEBUG_ARRAY_MAP) startPos = dataPosition(); 2681 String key = readString(); 2682 Object value = readValue(loader); 2683 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Read #" + (N-1) + " " 2684 + (dataPosition()-startPos) + " bytes: key=0x" 2685 + Integer.toHexString((key != null ? key.hashCode() : 0)) + " " + key); 2686 outVal.append(key, value); 2687 N--; 2688 } 2689 outVal.validate(); 2690 } 2691 2692 /* package */ void readArrayMapSafelyInternal(ArrayMap outVal, int N, 2693 ClassLoader loader) { 2694 if (DEBUG_ARRAY_MAP) { 2695 RuntimeException here = new RuntimeException("here"); 2696 here.fillInStackTrace(); 2697 Log.d(TAG, "Reading safely " + N + " ArrayMap entries", here); 2698 } 2699 while (N > 0) { 2700 String key = readString(); 2701 if (DEBUG_ARRAY_MAP) Log.d(TAG, " Read safe #" + (N-1) + ": key=0x" 2702 + (key != null ? key.hashCode() : 0) + " " + key); 2703 Object value = readValue(loader); 2704 outVal.put(key, value); 2705 N--; 2706 } 2707 } 2708 2709 /** 2710 * @hide For testing only. 2711 */ 2712 public void readArrayMap(ArrayMap outVal, ClassLoader loader) { 2713 final int N = readInt(); 2714 if (N < 0) { 2715 return; 2716 } 2717 readArrayMapInternal(outVal, N, loader); 2718 } 2719 2720 private void readListInternal(List outVal, int N, 2721 ClassLoader loader) { 2722 while (N > 0) { 2723 Object value = readValue(loader); 2724 //Log.d(TAG, "Unmarshalling value=" + value); 2725 outVal.add(value); 2726 N--; 2727 } 2728 } 2729 2730 private void readArrayInternal(Object[] outVal, int N, 2731 ClassLoader loader) { 2732 for (int i = 0; i < N; i++) { 2733 Object value = readValue(loader); 2734 //Log.d(TAG, "Unmarshalling value=" + value); 2735 outVal[i] = value; 2736 } 2737 } 2738 2739 private void readSparseArrayInternal(SparseArray outVal, int N, 2740 ClassLoader loader) { 2741 while (N > 0) { 2742 int key = readInt(); 2743 Object value = readValue(loader); 2744 //Log.i(TAG, "Unmarshalling key=" + key + " value=" + value); 2745 outVal.append(key, value); 2746 N--; 2747 } 2748 } 2749 2750 2751 private void readSparseBooleanArrayInternal(SparseBooleanArray outVal, int N) { 2752 while (N > 0) { 2753 int key = readInt(); 2754 boolean value = this.readByte() == 1; 2755 //Log.i(TAG, "Unmarshalling key=" + key + " value=" + value); 2756 outVal.append(key, value); 2757 N--; 2758 } 2759 } 2760 2761 /** 2762 * @hide For testing 2763 */ 2764 public long getBlobAshmemSize() { 2765 return nativeGetBlobAshmemSize(mNativePtr); 2766 } 2767} 2768