Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 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 | |
| 17 | package android.nfc.cardemulation; |
| 18 | |
| 19 | import android.app.Activity; |
| 20 | import android.app.ActivityThread; |
| 21 | import android.content.ComponentName; |
| 22 | import android.content.Context; |
| 23 | import android.content.pm.IPackageManager; |
| 24 | import android.content.pm.PackageManager; |
| 25 | import android.nfc.INfcFCardEmulation; |
| 26 | import android.nfc.NfcAdapter; |
| 27 | import android.os.RemoteException; |
| 28 | import android.os.UserHandle; |
| 29 | import android.util.Log; |
| 30 | |
| 31 | import java.util.HashMap; |
| 32 | import java.util.List; |
| 33 | |
| 34 | /** |
| 35 | * This class can be used to query the state of |
| 36 | * NFC-F card emulation services. |
| 37 | * |
| 38 | * For a general introduction into NFC card emulation, |
| 39 | * please read the <a href="{@docRoot}guide/topics/connectivity/nfc/hce.html"> |
| 40 | * NFC card emulation developer guide</a>.</p> |
| 41 | * |
| 42 | * <p class="note">Use of this class requires the |
| 43 | * {@link PackageManager#FEATURE_NFC_HOST_CARD_EMULATION_NFCF} |
| 44 | * to be present on the device. |
| 45 | */ |
| 46 | public final class NfcFCardEmulation { |
| 47 | static final String TAG = "NfcFCardEmulation"; |
| 48 | |
| 49 | static boolean sIsInitialized = false; |
| 50 | static HashMap<Context, NfcFCardEmulation> sCardEmus = new HashMap<Context, NfcFCardEmulation>(); |
| 51 | static INfcFCardEmulation sService; |
| 52 | |
| 53 | final Context mContext; |
| 54 | |
| 55 | private NfcFCardEmulation(Context context, INfcFCardEmulation service) { |
| 56 | mContext = context.getApplicationContext(); |
| 57 | sService = service; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Helper to get an instance of this class. |
| 62 | * |
| 63 | * @param adapter A reference to an NfcAdapter object. |
| 64 | * @return |
| 65 | */ |
| 66 | public static synchronized NfcFCardEmulation getInstance(NfcAdapter adapter) { |
| 67 | if (adapter == null) throw new NullPointerException("NfcAdapter is null"); |
| 68 | Context context = adapter.getContext(); |
| 69 | if (context == null) { |
| 70 | Log.e(TAG, "NfcAdapter context is null."); |
| 71 | throw new UnsupportedOperationException(); |
| 72 | } |
| 73 | if (!sIsInitialized) { |
| 74 | IPackageManager pm = ActivityThread.getPackageManager(); |
| 75 | if (pm == null) { |
| 76 | Log.e(TAG, "Cannot get PackageManager"); |
| 77 | throw new UnsupportedOperationException(); |
| 78 | } |
| 79 | try { |
Jeff Sharkey | 115d2c1 | 2016-02-15 17:25:57 -0700 | [diff] [blame] | 80 | if (!pm.hasSystemFeature(PackageManager.FEATURE_NFC_HOST_CARD_EMULATION_NFCF, 0)) { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 81 | Log.e(TAG, "This device does not support NFC-F card emulation"); |
| 82 | throw new UnsupportedOperationException(); |
| 83 | } |
| 84 | } catch (RemoteException e) { |
| 85 | Log.e(TAG, "PackageManager query failed."); |
| 86 | throw new UnsupportedOperationException(); |
| 87 | } |
| 88 | sIsInitialized = true; |
| 89 | } |
| 90 | NfcFCardEmulation manager = sCardEmus.get(context); |
| 91 | if (manager == null) { |
| 92 | // Get card emu service |
| 93 | INfcFCardEmulation service = adapter.getNfcFCardEmulationService(); |
| 94 | if (service == null) { |
| 95 | Log.e(TAG, "This device does not implement the INfcFCardEmulation interface."); |
| 96 | throw new UnsupportedOperationException(); |
| 97 | } |
| 98 | manager = new NfcFCardEmulation(context, service); |
| 99 | sCardEmus.put(context, manager); |
| 100 | } |
| 101 | return manager; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * Retrieves the current System Code for the specified service. |
| 106 | * |
| 107 | * <p>Before calling {@link #registerSystemCodeForService(ComponentName, String)}, |
| 108 | * the System Code contained in the Manifest file is returned. After calling |
| 109 | * {@link #registerSystemCodeForService(ComponentName, String)}, the System Code |
| 110 | * registered there is returned. After calling |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 111 | * {@link #unregisterSystemCodeForService(ComponentName)}, "null" is returned. |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 112 | * |
| 113 | * @param service The component name of the service |
| 114 | * @return the current System Code |
| 115 | */ |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 116 | public String getSystemCodeForService(ComponentName service) throws RuntimeException { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 117 | if (service == null) { |
| 118 | throw new NullPointerException("service is null"); |
| 119 | } |
| 120 | try { |
| 121 | return sService.getSystemCodeForService(UserHandle.myUserId(), service); |
| 122 | } catch (RemoteException e) { |
| 123 | // Try one more time |
| 124 | recoverService(); |
| 125 | if (sService == null) { |
| 126 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 127 | return null; |
| 128 | } |
| 129 | try { |
| 130 | return sService.getSystemCodeForService(UserHandle.myUserId(), service); |
| 131 | } catch (RemoteException ee) { |
| 132 | Log.e(TAG, "Failed to reach CardEmulationService."); |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 133 | ee.rethrowAsRuntimeException(); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 134 | return null; |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Registers a System Code for the specified service. |
| 141 | * |
| 142 | * <p>The System Code must be in range from "4000" to "4FFF" (excluding "4*FF"). |
| 143 | * |
| 144 | * <p>If a System Code was previously registered for this service |
| 145 | * (either statically through the manifest, or dynamically by using this API), |
| 146 | * it will be replaced with this one. |
| 147 | * |
| 148 | * <p>Even if the same System Code is already registered for another service, |
| 149 | * this method succeeds in registering the System Code. |
| 150 | * |
| 151 | * <p>Note that you can only register a System Code for a service that |
| 152 | * is running under the same UID as the caller of this API. Typically |
| 153 | * this means you need to call this from the same |
| 154 | * package as the service itself, though UIDs can also |
| 155 | * be shared between packages using shared UIDs. |
| 156 | * |
| 157 | * @param service The component name of the service |
| 158 | * @param systemCode The System Code to be registered |
| 159 | * @return whether the registration was successful. |
| 160 | */ |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 161 | public boolean registerSystemCodeForService(ComponentName service, String systemCode) |
| 162 | throws RuntimeException { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 163 | if (service == null || systemCode == null) { |
| 164 | throw new NullPointerException("service or systemCode is null"); |
| 165 | } |
| 166 | try { |
| 167 | return sService.registerSystemCodeForService(UserHandle.myUserId(), |
| 168 | service, systemCode); |
| 169 | } catch (RemoteException e) { |
| 170 | // Try one more time |
| 171 | recoverService(); |
| 172 | if (sService == null) { |
| 173 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 174 | return false; |
| 175 | } |
| 176 | try { |
| 177 | return sService.registerSystemCodeForService(UserHandle.myUserId(), |
| 178 | service, systemCode); |
| 179 | } catch (RemoteException ee) { |
| 180 | Log.e(TAG, "Failed to reach CardEmulationService."); |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 181 | ee.rethrowAsRuntimeException(); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 182 | return false; |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Removes a registered System Code for the specified service. |
| 189 | * |
| 190 | * @param service The component name of the service |
| 191 | * @return whether the System Code was successfully removed. |
| 192 | */ |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 193 | public boolean unregisterSystemCodeForService(ComponentName service) throws RuntimeException { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 194 | if (service == null) { |
| 195 | throw new NullPointerException("service is null"); |
| 196 | } |
| 197 | try { |
| 198 | return sService.removeSystemCodeForService(UserHandle.myUserId(), service); |
| 199 | } catch (RemoteException e) { |
| 200 | // Try one more time |
| 201 | recoverService(); |
| 202 | if (sService == null) { |
| 203 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 204 | return false; |
| 205 | } |
| 206 | try { |
| 207 | return sService.removeSystemCodeForService(UserHandle.myUserId(), service); |
| 208 | } catch (RemoteException ee) { |
| 209 | Log.e(TAG, "Failed to reach CardEmulationService."); |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 210 | ee.rethrowAsRuntimeException(); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 211 | return false; |
| 212 | } |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | /** |
| 217 | * Retrieves the current NFCID2 for the specified service. |
| 218 | * |
| 219 | * <p>Before calling {@link #setNfcid2ForService(ComponentName, String)}, |
| 220 | * the NFCID2 contained in the Manifest file is returned. If "random" is specified |
| 221 | * in the Manifest file, a random number assigned by the system at installation time |
| 222 | * is returned. After setting an NFCID2 |
| 223 | * with {@link #setNfcid2ForService(ComponentName, String)}, this NFCID2 is returned. |
| 224 | * |
| 225 | * @param service The component name of the service |
| 226 | * @return the current NFCID2 |
| 227 | */ |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 228 | public String getNfcid2ForService(ComponentName service) throws RuntimeException { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 229 | if (service == null) { |
| 230 | throw new NullPointerException("service is null"); |
| 231 | } |
| 232 | try { |
| 233 | return sService.getNfcid2ForService(UserHandle.myUserId(), service); |
| 234 | } catch (RemoteException e) { |
| 235 | // Try one more time |
| 236 | recoverService(); |
| 237 | if (sService == null) { |
| 238 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 239 | return null; |
| 240 | } |
| 241 | try { |
| 242 | return sService.getNfcid2ForService(UserHandle.myUserId(), service); |
| 243 | } catch (RemoteException ee) { |
| 244 | Log.e(TAG, "Failed to reach CardEmulationService."); |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 245 | ee.rethrowAsRuntimeException(); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 246 | return null; |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Set a NFCID2 for the specified service. |
| 253 | * |
| 254 | * <p>The NFCID2 must be in range from "02FE000000000000" to "02FEFFFFFFFFFFFF". |
| 255 | * |
| 256 | * <p>If a NFCID2 was previously set for this service |
| 257 | * (either statically through the manifest, or dynamically by using this API), |
| 258 | * it will be replaced. |
| 259 | * |
| 260 | * <p>Note that you can only set the NFCID2 for a service that |
| 261 | * is running under the same UID as the caller of this API. Typically |
| 262 | * this means you need to call this from the same |
| 263 | * package as the service itself, though UIDs can also |
| 264 | * be shared between packages using shared UIDs. |
| 265 | * |
| 266 | * @param service The component name of the service |
| 267 | * @param nfcid2 The NFCID2 to be registered |
| 268 | * @return whether the setting was successful. |
| 269 | */ |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 270 | public boolean setNfcid2ForService(ComponentName service, String nfcid2) |
| 271 | throws RuntimeException { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 272 | if (service == null || nfcid2 == null) { |
| 273 | throw new NullPointerException("service or nfcid2 is null"); |
| 274 | } |
| 275 | try { |
| 276 | return sService.setNfcid2ForService(UserHandle.myUserId(), |
| 277 | service, nfcid2); |
| 278 | } catch (RemoteException e) { |
| 279 | // Try one more time |
| 280 | recoverService(); |
| 281 | if (sService == null) { |
| 282 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 283 | return false; |
| 284 | } |
| 285 | try { |
| 286 | return sService.setNfcid2ForService(UserHandle.myUserId(), |
| 287 | service, nfcid2); |
| 288 | } catch (RemoteException ee) { |
| 289 | Log.e(TAG, "Failed to reach CardEmulationService."); |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 290 | ee.rethrowAsRuntimeException(); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 291 | return false; |
| 292 | } |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Allows a foreground application to specify which card emulation service |
| 298 | * should be enabled while a specific Activity is in the foreground. |
| 299 | * |
| 300 | * <p>The specified HCE-F service is only enabled when the corresponding application is |
| 301 | * in the foreground and this method has been called. When the application is moved to |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 302 | * the background, {@link #disableService(Activity)} is called, or |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 303 | * NFCID2 or System Code is replaced, the HCE-F service is disabled. |
| 304 | * |
| 305 | * <p>The specified Activity must currently be in resumed state. A good |
| 306 | * paradigm is to call this method in your {@link Activity#onResume}, and to call |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 307 | * {@link #disableService(Activity)} in your {@link Activity#onPause}. |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 308 | * |
| 309 | * <p>Note that this preference is not persisted by the OS, and hence must be |
| 310 | * called every time the Activity is resumed. |
| 311 | * |
| 312 | * @param activity The activity which prefers this service to be invoked |
| 313 | * @param service The service to be preferred while this activity is in the foreground |
| 314 | * @return whether the registration was successful |
| 315 | */ |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 316 | public boolean enableService(Activity activity, ComponentName service) throws RuntimeException { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 317 | if (activity == null || service == null) { |
| 318 | throw new NullPointerException("activity or service is null"); |
| 319 | } |
| 320 | // Verify the activity is in the foreground before calling into NfcService |
| 321 | if (!activity.isResumed()) { |
| 322 | throw new IllegalArgumentException("Activity must be resumed."); |
| 323 | } |
| 324 | try { |
| 325 | return sService.enableNfcFForegroundService(service); |
| 326 | } catch (RemoteException e) { |
| 327 | // Try one more time |
| 328 | recoverService(); |
| 329 | if (sService == null) { |
| 330 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 331 | return false; |
| 332 | } |
| 333 | try { |
| 334 | return sService.enableNfcFForegroundService(service); |
| 335 | } catch (RemoteException ee) { |
| 336 | Log.e(TAG, "Failed to reach CardEmulationService."); |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 337 | ee.rethrowAsRuntimeException(); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 338 | return false; |
| 339 | } |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | /** |
| 344 | * Disables the service for the specified Activity. |
| 345 | * |
| 346 | * <p>Note that the specified Activity must still be in resumed |
| 347 | * state at the time of this call. A good place to call this method |
| 348 | * is in your {@link Activity#onPause} implementation. |
| 349 | * |
| 350 | * @param activity The activity which the service was registered for |
| 351 | * @return true when successful |
| 352 | */ |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 353 | public boolean disableService(Activity activity) throws RuntimeException { |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 354 | if (activity == null) { |
| 355 | throw new NullPointerException("activity is null"); |
| 356 | } |
| 357 | if (!activity.isResumed()) { |
| 358 | throw new IllegalArgumentException("Activity must be resumed."); |
| 359 | } |
| 360 | try { |
| 361 | return sService.disableNfcFForegroundService(); |
| 362 | } catch (RemoteException e) { |
| 363 | // Try one more time |
| 364 | recoverService(); |
| 365 | if (sService == null) { |
| 366 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 367 | return false; |
| 368 | } |
| 369 | try { |
| 370 | return sService.disableNfcFForegroundService(); |
| 371 | } catch (RemoteException ee) { |
| 372 | Log.e(TAG, "Failed to reach CardEmulationService."); |
Martijn Coenen | 007e029 | 2016-04-26 09:47:56 +0200 | [diff] [blame] | 373 | ee.rethrowAsRuntimeException(); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 374 | return false; |
| 375 | } |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * @hide |
| 381 | */ |
| 382 | public List<NfcFServiceInfo> getNfcFServices() { |
| 383 | try { |
| 384 | return sService.getNfcFServices(UserHandle.myUserId()); |
| 385 | } catch (RemoteException e) { |
| 386 | // Try one more time |
| 387 | recoverService(); |
| 388 | if (sService == null) { |
| 389 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 390 | return null; |
| 391 | } |
| 392 | try { |
| 393 | return sService.getNfcFServices(UserHandle.myUserId()); |
| 394 | } catch (RemoteException ee) { |
| 395 | Log.e(TAG, "Failed to reach CardEmulationService."); |
| 396 | return null; |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * @hide |
| 403 | */ |
| 404 | public int getMaxNumOfRegisterableSystemCodes() { |
| 405 | try { |
| 406 | return sService.getMaxNumOfRegisterableSystemCodes(); |
| 407 | } catch (RemoteException e) { |
| 408 | // Try one more time |
| 409 | recoverService(); |
| 410 | if (sService == null) { |
| 411 | Log.e(TAG, "Failed to recover CardEmulationService."); |
| 412 | return -1; |
| 413 | } |
| 414 | try { |
| 415 | return sService.getMaxNumOfRegisterableSystemCodes(); |
| 416 | } catch (RemoteException ee) { |
| 417 | Log.e(TAG, "Failed to reach CardEmulationService."); |
| 418 | return -1; |
| 419 | } |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | /** |
| 424 | * @hide |
| 425 | */ |
| 426 | public static boolean isValidSystemCode(String systemCode) { |
| 427 | if (systemCode == null) { |
| 428 | return false; |
| 429 | } |
| 430 | if (systemCode.length() != 4) { |
| 431 | Log.e(TAG, "System Code " + systemCode + " is not a valid System Code."); |
| 432 | return false; |
| 433 | } |
| 434 | // check if the value is between "4000" and "4FFF" (excluding "4*FF") |
| 435 | if (!systemCode.startsWith("4") || systemCode.toUpperCase().endsWith("FF")) { |
| 436 | Log.e(TAG, "System Code " + systemCode + " is not a valid System Code."); |
| 437 | return false; |
| 438 | } |
| 439 | try { |
Narayan Kamath | a09b4d2 | 2016-04-15 18:32:45 +0100 | [diff] [blame] | 440 | Integer.parseInt(systemCode, 16); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 441 | } catch (NumberFormatException e) { |
| 442 | Log.e(TAG, "System Code " + systemCode + " is not a valid System Code."); |
| 443 | return false; |
| 444 | } |
| 445 | return true; |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * @hide |
| 450 | */ |
| 451 | public static boolean isValidNfcid2(String nfcid2) { |
| 452 | if (nfcid2 == null) { |
| 453 | return false; |
| 454 | } |
| 455 | if (nfcid2.length() != 16) { |
| 456 | Log.e(TAG, "NFCID2 " + nfcid2 + " is not a valid NFCID2."); |
| 457 | return false; |
| 458 | } |
| 459 | // check if the the value starts with "02FE" |
| 460 | if (!nfcid2.toUpperCase().startsWith("02FE")) { |
| 461 | Log.e(TAG, "NFCID2 " + nfcid2 + " is not a valid NFCID2."); |
| 462 | return false; |
| 463 | } |
| 464 | try { |
Tobias Thierer | 28532d0 | 2016-04-21 14:52:10 +0100 | [diff] [blame] | 465 | Long.parseLong(nfcid2, 16); |
Yoshinobu Ito | c52adfe | 2016-01-22 18:14:18 +0900 | [diff] [blame] | 466 | } catch (NumberFormatException e) { |
| 467 | Log.e(TAG, "NFCID2 " + nfcid2 + " is not a valid NFCID2."); |
| 468 | return false; |
| 469 | } |
| 470 | return true; |
| 471 | } |
| 472 | |
| 473 | void recoverService() { |
| 474 | NfcAdapter adapter = NfcAdapter.getDefaultAdapter(mContext); |
| 475 | sService = adapter.getNfcFCardEmulationService(); |
| 476 | } |
| 477 | |
| 478 | } |
| 479 | |