NativeNfcTag.java revision 1639c10dcfa150cf1c2bac171b8b710f103af766
1/* 2 * Copyright (C) 2010 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 com.android.nfc.dhimpl; 18 19import android.annotation.Nullable; 20import com.android.nfc.DeviceHost; 21import com.android.nfc.DeviceHost.TagEndpoint; 22 23import android.nfc.FormatException; 24import android.nfc.NdefMessage; 25import android.nfc.tech.IsoDep; 26import android.nfc.tech.MifareClassic; 27import android.nfc.tech.MifareUltralight; 28import android.nfc.tech.Ndef; 29import android.nfc.tech.NfcA; 30import android.nfc.tech.NfcB; 31import android.nfc.tech.NfcF; 32import android.nfc.tech.NfcV; 33import android.nfc.tech.NfcBarcode; 34import android.nfc.tech.TagTechnology; 35import android.os.Bundle; 36import android.util.Log; 37 38/** 39 * Native interface to the NFC tag functions 40 */ 41public class NativeNfcTag implements TagEndpoint { 42 static final boolean DBG = true; 43 44 static final int STATUS_CODE_TARGET_LOST = 146; 45 46 private int[] mTechList; 47 private int[] mTechHandles; 48 private int[] mTechLibNfcTypes; 49 private Bundle[] mTechExtras; 50 private byte[][] mTechPollBytes; 51 private byte[][] mTechActBytes; 52 private byte[] mUid; 53 54 // mConnectedHandle stores the *real* libnfc handle 55 // that we're connected to. 56 private int mConnectedHandle; 57 58 // mConnectedTechIndex stores to which technology 59 // the upper layer stack is connected. Note that 60 // we may be connected to a libnfchandle without being 61 // connected to a technology - technology changes 62 // may occur runtime, whereas the underlying handle 63 // could stay present. Usually all technologies are on the 64 // same handle, with the exception of multi-protocol 65 // tags. 66 private int mConnectedTechIndex; // Index in mTechHandles 67 68 private final String TAG = "NativeNfcTag"; 69 70 private boolean mIsPresent; // Whether the tag is known to be still present 71 72 private PresenceCheckWatchdog mWatchdog; 73 class PresenceCheckWatchdog extends Thread { 74 75 private final int watchdogTimeout; 76 private final DeviceHost.TagDisconnectedCallback tagDisconnectedCallback; 77 78 private boolean isPresent = true; 79 private boolean isStopped = false; 80 private boolean isPaused = false; 81 private boolean doCheck = true; 82 83 public PresenceCheckWatchdog(int presenceCheckDelay, 84 @Nullable DeviceHost.TagDisconnectedCallback callback) { 85 watchdogTimeout = presenceCheckDelay; 86 tagDisconnectedCallback = callback; 87 } 88 89 public synchronized void pause() { 90 isPaused = true; 91 doCheck = false; 92 this.notifyAll(); 93 } 94 95 public synchronized void doResume() { 96 isPaused = false; 97 // We don't want to resume presence checking immediately, 98 // but go through at least one more wait period. 99 doCheck = false; 100 this.notifyAll(); 101 } 102 103 public synchronized void end() { 104 isStopped = true; 105 doCheck = false; 106 this.notifyAll(); 107 } 108 109 @Override 110 public void run() { 111 synchronized (this) { 112 if (DBG) Log.d(TAG, "Starting background presence check"); 113 while (isPresent && !isStopped) { 114 try { 115 if (!isPaused) { 116 doCheck = true; 117 } 118 this.wait(watchdogTimeout); 119 if (doCheck) { 120 isPresent = doPresenceCheck(); 121 } else { 122 // 1) We are paused, waiting for unpause 123 // 2) We just unpaused, do pres check in next iteration 124 // (after watchdogTimeout ms sleep) 125 // 3) We just set the timeout, wait for this timeout 126 // to expire once first. 127 // 4) We just stopped, exit loop anyway 128 } 129 } catch (InterruptedException e) { 130 // Activity detected, loop 131 } 132 } 133 } 134 135 synchronized (NativeNfcTag.this) { 136 mIsPresent = false; 137 } 138 // Restart the polling loop 139 140 Log.d(TAG, "Tag lost, restarting polling loop"); 141 doDisconnect(); 142 if (tagDisconnectedCallback != null) { 143 tagDisconnectedCallback.onTagDisconnected(mConnectedHandle); 144 } 145 if (DBG) Log.d(TAG, "Stopping background presence check"); 146 } 147 } 148 149 private native int doConnect(int handle); 150 public synchronized int connectWithStatus(int technology) { 151 if (mWatchdog != null) { 152 mWatchdog.pause(); 153 } 154 int status = -1; 155 for (int i = 0; i < mTechList.length; i++) { 156 if (mTechList[i] == technology) { 157 // Get the handle and connect, if not already connected 158 if (mConnectedHandle != mTechHandles[i]) { 159 // We're not yet connected to this handle, there are 160 // a few scenario's here: 161 // 1) We are not connected to anything yet - allow 162 // 2) We are connected to a technology which has 163 // a different handle (multi-protocol tag); we support 164 // switching to that. 165 if (mConnectedHandle == -1) { 166 // Not connected yet 167 //status = doConnect(mTechHandles[i]); 168 status = doConnect(i); 169 } else { 170 // Connect to a tech with a different handle 171 Log.d(TAG,"Connect to a tech with a different handle"); 172 //status = reconnectWithStatus(mTechHandles[i]); 173 status = reconnectWithStatus(i); 174 } 175 if (status == 0) { 176 mConnectedHandle = mTechHandles[i]; 177 mConnectedTechIndex = i; 178 } 179 } else { 180 // 1) We are connected to a technology which has the same 181 // handle; we do not support connecting at a different 182 // level (libnfc auto-activates to the max level on 183 // any handle). 184 // 2) We are connecting to the ndef technology - always 185 // allowed. 186 if ((technology == TagTechnology.NDEF) || 187 (technology == TagTechnology.NDEF_FORMATABLE)) { 188 // special case for NDEF, this will cause switch to ISO_DEP frame intf 189 i = 0; 190 // status = 0; 191 } 192 status = reconnectWithStatus(i); 193 /* 194 if ((technology != TagTechnology.ISO_DEP) && 195 (hasTechOnHandle(TagTechnology.ISO_DEP, mTechHandles[i]))) { 196 // Don't allow to connect a -4 tag at a different level 197 // than IsoDep, as this is not supported by 198 // libNFC. 199 // revised for NFCA... do allow to connect a -4 tag at this level. 200 Log.d(TAG,"Connect to a tech with same different handle (rf intf change)"); 201 status = reconnectWithStatus(i); 202 if (status == 0) { 203 mConnectedHandle = mTechHandles[i]; 204 mConnectedTechIndex = i; 205 } 206 //status = 0; 207 } else { 208 status = 0; 209 } 210 */ 211 212 213 if (status == 0) { 214 mConnectedTechIndex = i; 215 // Handle was already identical 216 } 217 } 218 break; 219 } 220 } 221 if (mWatchdog != null) { 222 mWatchdog.doResume(); 223 } 224 return status; 225 } 226 @Override 227 public synchronized boolean connect(int technology) { 228 return connectWithStatus(technology) == 0; 229 } 230 231 @Override 232 public synchronized void startPresenceChecking(int presenceCheckDelay, 233 DeviceHost.TagDisconnectedCallback callback) { 234 // Once we start presence checking, we allow the upper layers 235 // to know the tag is in the field. 236 mIsPresent = true; 237 if (mWatchdog == null) { 238 mWatchdog = new PresenceCheckWatchdog(presenceCheckDelay, callback); 239 mWatchdog.start(); 240 } 241 } 242 243 @Override 244 public synchronized boolean isPresent() { 245 // Returns whether the tag is still in the field to the best 246 // of our knowledge. 247 return mIsPresent; 248 } 249 native boolean doDisconnect(); 250 @Override 251 public synchronized boolean disconnect() { 252 boolean result = false; 253 254 mIsPresent = false; 255 if (mWatchdog != null) { 256 // Watchdog has already disconnected or will do it 257 mWatchdog.end(); 258 try { 259 mWatchdog.join(); 260 } catch (InterruptedException e) { 261 // Should never happen. 262 } 263 mWatchdog = null; 264 result = true; 265 } else { 266 result = doDisconnect(); 267 } 268 269 mConnectedTechIndex = -1; 270 mConnectedHandle = -1; 271 return result; 272 } 273 274 native int doReconnect(); 275 public synchronized int reconnectWithStatus() { 276 if (mWatchdog != null) { 277 mWatchdog.pause(); 278 } 279 int status = doReconnect(); 280 if (mWatchdog != null) { 281 mWatchdog.doResume(); 282 } 283 return status; 284 } 285 @Override 286 public synchronized boolean reconnect() { 287 return reconnectWithStatus() == 0; 288 } 289 290 native int doHandleReconnect(int handle); 291 public synchronized int reconnectWithStatus(int handle) { 292 if (mWatchdog != null) { 293 mWatchdog.pause(); 294 } 295 int status = doHandleReconnect(handle); 296 if (mWatchdog != null) { 297 mWatchdog.doResume(); 298 } 299 return status; 300 } 301 302 private native byte[] doTransceive(byte[] data, boolean raw, int[] returnCode); 303 @Override 304 public synchronized byte[] transceive(byte[] data, boolean raw, int[] returnCode) { 305 if (mWatchdog != null) { 306 mWatchdog.pause(); 307 } 308 byte[] result = doTransceive(data, raw, returnCode); 309 if (mWatchdog != null) { 310 mWatchdog.doResume(); 311 } 312 return result; 313 } 314 315 private native int doCheckNdef(int[] ndefinfo); 316 private synchronized int checkNdefWithStatus(int[] ndefinfo) { 317 if (mWatchdog != null) { 318 mWatchdog.pause(); 319 } 320 int status = doCheckNdef(ndefinfo); 321 if (mWatchdog != null) { 322 mWatchdog.doResume(); 323 } 324 return status; 325 } 326 @Override 327 public synchronized boolean checkNdef(int[] ndefinfo) { 328 return checkNdefWithStatus(ndefinfo) == 0; 329 } 330 331 private native byte[] doRead(); 332 @Override 333 public synchronized byte[] readNdef() { 334 if (mWatchdog != null) { 335 mWatchdog.pause(); 336 } 337 byte[] result = doRead(); 338 if (mWatchdog != null) { 339 mWatchdog.doResume(); 340 } 341 return result; 342 } 343 344 private native boolean doWrite(byte[] buf); 345 @Override 346 public synchronized boolean writeNdef(byte[] buf) { 347 if (mWatchdog != null) { 348 mWatchdog.pause(); 349 } 350 boolean result = doWrite(buf); 351 if (mWatchdog != null) { 352 mWatchdog.doResume(); 353 } 354 return result; 355 } 356 357 native boolean doPresenceCheck(); 358 @Override 359 public synchronized boolean presenceCheck() { 360 if (mWatchdog != null) { 361 mWatchdog.pause(); 362 } 363 boolean result = doPresenceCheck(); 364 if (mWatchdog != null) { 365 mWatchdog.doResume(); 366 } 367 return result; 368 } 369 370 native boolean doNdefFormat(byte[] key); 371 @Override 372 public synchronized boolean formatNdef(byte[] key) { 373 if (mWatchdog != null) { 374 mWatchdog.pause(); 375 } 376 boolean result = doNdefFormat(key); 377 if (mWatchdog != null) { 378 mWatchdog.doResume(); 379 } 380 return result; 381 } 382 383 native boolean doMakeReadonly(byte[] key); 384 @Override 385 public synchronized boolean makeReadOnly() { 386 if (mWatchdog != null) { 387 mWatchdog.pause(); 388 } 389 boolean result; 390 if (hasTech(TagTechnology.MIFARE_CLASSIC)) { 391 result = doMakeReadonly(MifareClassic.KEY_DEFAULT); 392 } else { 393 // No key needed for other technologies 394 result = doMakeReadonly(new byte[] {}); 395 } 396 if (mWatchdog != null) { 397 mWatchdog.doResume(); 398 } 399 return result; 400 } 401 402 native boolean doIsIsoDepNdefFormatable(byte[] poll, byte[] act); 403 @Override 404 public synchronized boolean isNdefFormatable() { 405 // Let native code decide whether the currently activated tag 406 // is formatable. Although the name of the JNI function refers 407 // to ISO-DEP, the JNI function checks all tag types. 408 return doIsIsoDepNdefFormatable(mTechPollBytes[0], 409 mTechActBytes[0]); 410 } 411 412 @Override 413 public int getHandle() { 414 // This is just a handle for the clients; it can simply use the first 415 // technology handle we have. 416 if (mTechHandles.length > 0) { 417 return mTechHandles[0]; 418 } else { 419 return 0; 420 } 421 } 422 423 @Override 424 public byte[] getUid() { 425 return mUid; 426 } 427 428 @Override 429 public int[] getTechList() { 430 return mTechList; 431 } 432 433 private int getConnectedHandle() { 434 return mConnectedHandle; 435 } 436 437 private int getConnectedLibNfcType() { 438 if (mConnectedTechIndex != -1 && mConnectedTechIndex < mTechLibNfcTypes.length) { 439 return mTechLibNfcTypes[mConnectedTechIndex]; 440 } else { 441 return 0; 442 } 443 } 444 445 @Override 446 public int getConnectedTechnology() { 447 if (mConnectedTechIndex != -1 && mConnectedTechIndex < mTechList.length) { 448 return mTechList[mConnectedTechIndex]; 449 } else { 450 return 0; 451 } 452 } 453 native int doGetNdefType(int libnfctype, int javatype); 454 private int getNdefType(int libnfctype, int javatype) { 455 return doGetNdefType(libnfctype, javatype); 456 } 457 458 private void addTechnology(int tech, int handle, int libnfctype) { 459 int[] mNewTechList = new int[mTechList.length + 1]; 460 System.arraycopy(mTechList, 0, mNewTechList, 0, mTechList.length); 461 mNewTechList[mTechList.length] = tech; 462 mTechList = mNewTechList; 463 464 int[] mNewHandleList = new int[mTechHandles.length + 1]; 465 System.arraycopy(mTechHandles, 0, mNewHandleList, 0, mTechHandles.length); 466 mNewHandleList[mTechHandles.length] = handle; 467 mTechHandles = mNewHandleList; 468 469 int[] mNewTypeList = new int[mTechLibNfcTypes.length + 1]; 470 System.arraycopy(mTechLibNfcTypes, 0, mNewTypeList, 0, mTechLibNfcTypes.length); 471 mNewTypeList[mTechLibNfcTypes.length] = libnfctype; 472 mTechLibNfcTypes = mNewTypeList; 473 } 474 475 @Override 476 public void removeTechnology(int tech) { 477 synchronized (this) { 478 int techIndex = getTechIndex(tech); 479 if (techIndex != -1) { 480 int[] mNewTechList = new int[mTechList.length - 1]; 481 System.arraycopy(mTechList, 0, mNewTechList, 0, techIndex); 482 System.arraycopy(mTechList, techIndex + 1, mNewTechList, techIndex, 483 mTechList.length - techIndex - 1); 484 mTechList = mNewTechList; 485 486 int[] mNewHandleList = new int[mTechHandles.length - 1]; 487 System.arraycopy(mTechHandles, 0, mNewHandleList, 0, techIndex); 488 System.arraycopy(mTechHandles, techIndex + 1, mNewTechList, techIndex, 489 mTechHandles.length - techIndex - 1); 490 mTechHandles = mNewHandleList; 491 492 int[] mNewTypeList = new int[mTechLibNfcTypes.length - 1]; 493 System.arraycopy(mTechLibNfcTypes, 0, mNewTypeList, 0, techIndex); 494 System.arraycopy(mTechLibNfcTypes, techIndex + 1, mNewTypeList, techIndex, 495 mTechLibNfcTypes.length - techIndex - 1); 496 mTechLibNfcTypes = mNewTypeList; 497 498 //The technology must be removed from the mTechExtras array, 499 //just like the above arrays. 500 //Remove the specified element from the array, 501 //then shift the remaining elements by one. 502 if (mTechExtras != null) 503 { 504 Bundle[] mNewTechExtras = new Bundle[mTechExtras.length - 1]; 505 System.arraycopy(mTechExtras, 0, mNewTechExtras, 0, techIndex); 506 System.arraycopy(mTechExtras, techIndex + 1, mNewTechExtras, techIndex, 507 mTechExtras.length - techIndex - 1); 508 mTechExtras = mNewTechExtras; 509 } 510 } 511 } 512 } 513 514 public void addNdefFormatableTechnology(int handle, int libnfcType) { 515 synchronized (this) { 516 addTechnology(TagTechnology.NDEF_FORMATABLE, handle, libnfcType); 517 } 518 } 519 520 // This method exists to "patch in" the ndef technologies, 521 // which is done inside Java instead of the native JNI code. 522 // To not create some nasty dependencies on the order on which things 523 // are called (most notably getTechExtras()), it needs some additional 524 // checking. 525 public void addNdefTechnology(NdefMessage msg, int handle, int libnfcType, 526 int javaType, int maxLength, int cardState) { 527 synchronized (this) { 528 addTechnology(TagTechnology.NDEF, handle, libnfcType); 529 530 Bundle extras = new Bundle(); 531 extras.putParcelable(Ndef.EXTRA_NDEF_MSG, msg); 532 extras.putInt(Ndef.EXTRA_NDEF_MAXLENGTH, maxLength); 533 extras.putInt(Ndef.EXTRA_NDEF_CARDSTATE, cardState); 534 extras.putInt(Ndef.EXTRA_NDEF_TYPE, getNdefType(libnfcType, javaType)); 535 536 if (mTechExtras == null) { 537 // This will build the tech extra's for the first time, 538 // including a NULL ref for the NDEF tech we generated above. 539 Bundle[] builtTechExtras = getTechExtras(); 540 builtTechExtras[builtTechExtras.length - 1] = extras; 541 } 542 else { 543 // Tech extras were built before, patch the NDEF one in 544 Bundle[] oldTechExtras = getTechExtras(); 545 Bundle[] newTechExtras = new Bundle[oldTechExtras.length + 1]; 546 System.arraycopy(oldTechExtras, 0, newTechExtras, 0, oldTechExtras.length); 547 newTechExtras[oldTechExtras.length] = extras; 548 mTechExtras = newTechExtras; 549 } 550 551 552 } 553 } 554 555 private int getTechIndex(int tech) { 556 int techIndex = -1; 557 for (int i = 0; i < mTechList.length; i++) { 558 if (mTechList[i] == tech) { 559 techIndex = i; 560 break; 561 } 562 } 563 return techIndex; 564 } 565 566 private boolean hasTech(int tech) { 567 boolean hasTech = false; 568 for (int i = 0; i < mTechList.length; i++) { 569 if (mTechList[i] == tech) { 570 hasTech = true; 571 break; 572 } 573 } 574 return hasTech; 575 } 576 577 private boolean hasTechOnHandle(int tech, int handle) { 578 boolean hasTech = false; 579 for (int i = 0; i < mTechList.length; i++) { 580 if (mTechList[i] == tech && mTechHandles[i] == handle) { 581 hasTech = true; 582 break; 583 } 584 } 585 return hasTech; 586 587 } 588 589 private boolean isUltralightC() { 590 /* Make a best-effort attempt at classifying ULTRALIGHT 591 * vs ULTRALIGHT-C (based on NXP's public AN1303). 592 * The memory layout is as follows: 593 * Page # BYTE1 BYTE2 BYTE3 BYTE4 594 * 2 INT1 INT2 LOCK LOCK 595 * 3 OTP OTP OTP OTP (NDEF CC if NDEF-formatted) 596 * 4 DATA DATA DATA DATA (version info if factory-state) 597 * 598 * Read four blocks from page 2, which will get us both 599 * the lock page, the OTP page and the version info. 600 */ 601 boolean isUltralightC = false; 602 byte[] readCmd = { 0x30, 0x02 }; 603 int[] retCode = new int[2]; 604 byte[] respData = transceive(readCmd, false, retCode); 605 if (respData != null && respData.length == 16) { 606 // Check the lock bits (last 2 bytes in page2) 607 // and the OTP bytes (entire page 3) 608 if (respData[2] == 0 && respData[3] == 0 && respData[4] == 0 && 609 respData[5] == 0 && respData[6] == 0 && respData[7] == 0) { 610 // Very likely to be a blank card, look at version info 611 // in page 4. 612 if ((respData[8] == (byte)0x02) && respData[9] == (byte)0x00) { 613 // This is Ultralight-C 614 isUltralightC = true; 615 } else { 616 // 0xFF 0xFF would indicate Ultralight, but we also use Ultralight 617 // as a fallback if it's anything else 618 isUltralightC = false; 619 } 620 } else { 621 // See if we can find the NDEF CC in the OTP page and if it's 622 // smaller than major version two 623 if (respData[4] == (byte)0xE1 && ((respData[5] & 0xff) < 0x20)) { 624 // OK, got NDEF. Technically we'd have to search for the 625 // NDEF TLV as well. However, this would add too much 626 // time for discovery and we can make already make a good guess 627 // with the data we have here. Byte 2 of the OTP page 628 // indicates the size of the tag - 0x06 is UL, anything 629 // above indicates UL-C. 630 if ((respData[6] & 0xff) > 0x06) { 631 isUltralightC = true; 632 } 633 } else { 634 // Fall back to ultralight 635 isUltralightC = false; 636 } 637 } 638 } 639 return isUltralightC; 640 } 641 642 @Override 643 public Bundle[] getTechExtras() { 644 synchronized (this) { 645 if (mTechExtras != null) return mTechExtras; 646 mTechExtras = new Bundle[mTechList.length]; 647 for (int i = 0; i < mTechList.length; i++) { 648 Bundle extras = new Bundle(); 649 switch (mTechList[i]) { 650 case TagTechnology.NFC_A: { 651 byte[] actBytes = mTechActBytes[i]; 652 if ((actBytes != null) && (actBytes.length > 0)) { 653 extras.putShort(NfcA.EXTRA_SAK, (short) (actBytes[0] & (short) 0xFF)); 654 } else { 655 // Unfortunately Jewel doesn't have act bytes, 656 // ignore this case. 657 } 658 extras.putByteArray(NfcA.EXTRA_ATQA, mTechPollBytes[i]); 659 break; 660 } 661 662 case TagTechnology.NFC_B: { 663 // What's returned from the PN544 is actually: 664 // 4 bytes app data 665 // 3 bytes prot info 666 byte[] appData = new byte[4]; 667 byte[] protInfo = new byte[3]; 668 if (mTechPollBytes[i].length >= 7) { 669 System.arraycopy(mTechPollBytes[i], 0, appData, 0, 4); 670 System.arraycopy(mTechPollBytes[i], 4, protInfo, 0, 3); 671 672 extras.putByteArray(NfcB.EXTRA_APPDATA, appData); 673 extras.putByteArray(NfcB.EXTRA_PROTINFO, protInfo); 674 } 675 break; 676 } 677 678 case TagTechnology.NFC_F: { 679 byte[] pmm = new byte[8]; 680 byte[] sc = new byte[2]; 681 if (mTechPollBytes[i].length >= 8) { 682 // At least pmm is present 683 System.arraycopy(mTechPollBytes[i], 0, pmm, 0, 8); 684 extras.putByteArray(NfcF.EXTRA_PMM, pmm); 685 } 686 if (mTechPollBytes[i].length == 10) { 687 System.arraycopy(mTechPollBytes[i], 8, sc, 0, 2); 688 extras.putByteArray(NfcF.EXTRA_SC, sc); 689 } 690 break; 691 } 692 693 case TagTechnology.ISO_DEP: { 694 if (hasTech(TagTechnology.NFC_A)) { 695 extras.putByteArray(IsoDep.EXTRA_HIST_BYTES, mTechActBytes[i]); 696 } 697 else { 698 extras.putByteArray(IsoDep.EXTRA_HI_LAYER_RESP, mTechActBytes[i]); 699 } 700 break; 701 } 702 703 case TagTechnology.NFC_V: { 704 // First byte response flags, second byte DSFID 705 if (mTechPollBytes[i] != null && mTechPollBytes[i].length >= 2) { 706 extras.putByte(NfcV.EXTRA_RESP_FLAGS, mTechPollBytes[i][0]); 707 extras.putByte(NfcV.EXTRA_DSFID, mTechPollBytes[i][1]); 708 } 709 break; 710 } 711 712 case TagTechnology.MIFARE_ULTRALIGHT: { 713 boolean isUlc = isUltralightC(); 714 extras.putBoolean(MifareUltralight.EXTRA_IS_UL_C, isUlc); 715 break; 716 } 717 718 case TagTechnology.NFC_BARCODE: { 719 // hard code this for now, this is the only valid type 720 extras.putInt(NfcBarcode.EXTRA_BARCODE_TYPE, NfcBarcode.TYPE_KOVIO); 721 break; 722 } 723 724 default: { 725 // Leave the entry in the array null 726 continue; 727 } 728 } 729 mTechExtras[i] = extras; 730 } 731 return mTechExtras; 732 } 733 } 734 735 @Override 736 public NdefMessage findAndReadNdef() { 737 // Try to find NDEF on any of the technologies. 738 int[] technologies = getTechList(); 739 int[] handles = mTechHandles; 740 NdefMessage ndefMsg = null; 741 boolean foundFormattable = false; 742 int formattableHandle = 0; 743 int formattableLibNfcType = 0; 744 int status; 745 746 for (int techIndex = 0; techIndex < technologies.length; techIndex++) { 747 // have we seen this handle before? 748 for (int i = 0; i < techIndex; i++) { 749 if (handles[i] == handles[techIndex]) { 750 continue; // don't check duplicate handles 751 } 752 } 753 754 status = connectWithStatus(technologies[techIndex]); 755 if (status != 0) { 756 Log.d(TAG, "Connect Failed - status = "+ status); 757 if (status == STATUS_CODE_TARGET_LOST) { 758 break; 759 } 760 continue; // try next handle 761 } 762 // Check if this type is NDEF formatable 763 if (!foundFormattable) { 764 if (isNdefFormatable()) { 765 foundFormattable = true; 766 formattableHandle = getConnectedHandle(); 767 formattableLibNfcType = getConnectedLibNfcType(); 768 // We'll only add formattable tech if no ndef is 769 // found - this is because libNFC refuses to format 770 // an already NDEF formatted tag. 771 } 772 reconnect(); 773 } 774 775 int[] ndefinfo = new int[2]; 776 status = checkNdefWithStatus(ndefinfo); 777 if (status != 0) { 778 Log.d(TAG, "Check NDEF Failed - status = " + status); 779 if (status == STATUS_CODE_TARGET_LOST) { 780 break; 781 } 782 continue; // try next handle 783 } 784 785 // found our NDEF handle 786 boolean generateEmptyNdef = false; 787 788 int supportedNdefLength = ndefinfo[0]; 789 int cardState = ndefinfo[1]; 790 byte[] buff = readNdef(); 791 if (buff != null) { 792 try { 793 ndefMsg = new NdefMessage(buff); 794 addNdefTechnology(ndefMsg, 795 getConnectedHandle(), 796 getConnectedLibNfcType(), 797 getConnectedTechnology(), 798 supportedNdefLength, cardState); 799 reconnect(); 800 } catch (FormatException e) { 801 // Create an intent anyway, without NDEF messages 802 generateEmptyNdef = true; 803 } 804 } else { 805 generateEmptyNdef = true; 806 } 807 808 if (generateEmptyNdef) { 809 ndefMsg = null; 810 addNdefTechnology(null, 811 getConnectedHandle(), 812 getConnectedLibNfcType(), 813 getConnectedTechnology(), 814 supportedNdefLength, cardState); 815 reconnect(); 816 } 817 break; 818 } 819 820 if (ndefMsg == null && foundFormattable) { 821 // Tag is not NDEF yet, and found a formattable target, 822 // so add formattable tech to tech list. 823 addNdefFormatableTechnology( 824 formattableHandle, 825 formattableLibNfcType); 826 } 827 828 return ndefMsg; 829 } 830} 831