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 17 // #define LOG_NDEBUG 0 18 19 #define LOG_TAG "MtpDeviceJNI" 20 #include "utils/Log.h" 21 22 #include <stdio.h> 23 #include <assert.h> 24 #include <limits.h> 25 #include <unistd.h> 26 #include <fcntl.h> 27 28 #include "jni.h" 29 #include "JNIHelp.h" 30 #include "android_runtime/AndroidRuntime.h" 31 #include "android_runtime/Log.h" 32 #include "private/android_filesystem_config.h" 33 34 #include "MtpTypes.h" 35 #include "MtpDevice.h" 36 #include "MtpDeviceInfo.h" 37 #include "MtpStorageInfo.h" 38 #include "MtpObjectInfo.h" 39 40 using namespace android; 41 42 // ---------------------------------------------------------------------------- 43 44 static jfieldID field_context; 45 46 jclass clazz_deviceInfo; 47 jclass clazz_storageInfo; 48 jclass clazz_objectInfo; 49 50 jmethodID constructor_deviceInfo; 51 jmethodID constructor_storageInfo; 52 jmethodID constructor_objectInfo; 53 54 // MtpDeviceInfo fields 55 static jfieldID field_deviceInfo_manufacturer; 56 static jfieldID field_deviceInfo_model; 57 static jfieldID field_deviceInfo_version; 58 static jfieldID field_deviceInfo_serialNumber; 59 60 // MtpStorageInfo fields 61 static jfieldID field_storageInfo_storageId; 62 static jfieldID field_storageInfo_maxCapacity; 63 static jfieldID field_storageInfo_freeSpace; 64 static jfieldID field_storageInfo_description; 65 static jfieldID field_storageInfo_volumeIdentifier; 66 67 // MtpObjectInfo fields 68 static jfieldID field_objectInfo_handle; 69 static jfieldID field_objectInfo_storageId; 70 static jfieldID field_objectInfo_format; 71 static jfieldID field_objectInfo_protectionStatus; 72 static jfieldID field_objectInfo_compressedSize; 73 static jfieldID field_objectInfo_thumbFormat; 74 static jfieldID field_objectInfo_thumbCompressedSize; 75 static jfieldID field_objectInfo_thumbPixWidth; 76 static jfieldID field_objectInfo_thumbPixHeight; 77 static jfieldID field_objectInfo_imagePixWidth; 78 static jfieldID field_objectInfo_imagePixHeight; 79 static jfieldID field_objectInfo_imagePixDepth; 80 static jfieldID field_objectInfo_parent; 81 static jfieldID field_objectInfo_associationType; 82 static jfieldID field_objectInfo_associationDesc; 83 static jfieldID field_objectInfo_sequenceNumber; 84 static jfieldID field_objectInfo_name; 85 static jfieldID field_objectInfo_dateCreated; 86 static jfieldID field_objectInfo_dateModified; 87 static jfieldID field_objectInfo_keywords; 88 89 MtpDevice* get_device_from_object(JNIEnv* env, jobject javaDevice) 90 { 91 return (MtpDevice*)env->GetLongField(javaDevice, field_context); 92 } 93 94 // ---------------------------------------------------------------------------- 95 96 static jboolean 97 android_mtp_MtpDevice_open(JNIEnv *env, jobject thiz, jstring deviceName, jint fd) 98 { 99 const char *deviceNameStr = env->GetStringUTFChars(deviceName, NULL); 100 if (deviceNameStr == NULL) { 101 return JNI_FALSE; 102 } 103 104 MtpDevice* device = MtpDevice::open(deviceNameStr, fd); 105 env->ReleaseStringUTFChars(deviceName, deviceNameStr); 106 107 if (device) 108 env->SetLongField(thiz, field_context, (jlong)device); 109 return (jboolean)(device != NULL); 110 } 111 112 static void 113 android_mtp_MtpDevice_close(JNIEnv *env, jobject thiz) 114 { 115 MtpDevice* device = get_device_from_object(env, thiz); 116 if (device) { 117 device->close(); 118 delete device; 119 env->SetLongField(thiz, field_context, 0); 120 } 121 } 122 123 static jobject 124 android_mtp_MtpDevice_get_device_info(JNIEnv *env, jobject thiz) 125 { 126 MtpDevice* device = get_device_from_object(env, thiz); 127 if (!device) { 128 ALOGD("android_mtp_MtpDevice_get_device_info device is null"); 129 return NULL; 130 } 131 MtpDeviceInfo* deviceInfo = device->getDeviceInfo(); 132 if (!deviceInfo) { 133 ALOGD("android_mtp_MtpDevice_get_device_info deviceInfo is null"); 134 return NULL; 135 } 136 jobject info = env->NewObject(clazz_deviceInfo, constructor_deviceInfo); 137 if (info == NULL) { 138 ALOGE("Could not create a MtpDeviceInfo object"); 139 delete deviceInfo; 140 return NULL; 141 } 142 143 if (deviceInfo->mManufacturer) 144 env->SetObjectField(info, field_deviceInfo_manufacturer, 145 env->NewStringUTF(deviceInfo->mManufacturer)); 146 if (deviceInfo->mModel) 147 env->SetObjectField(info, field_deviceInfo_model, 148 env->NewStringUTF(deviceInfo->mModel)); 149 if (deviceInfo->mVersion) 150 env->SetObjectField(info, field_deviceInfo_version, 151 env->NewStringUTF(deviceInfo->mVersion)); 152 if (deviceInfo->mSerial) 153 env->SetObjectField(info, field_deviceInfo_serialNumber, 154 env->NewStringUTF(deviceInfo->mSerial)); 155 156 delete deviceInfo; 157 return info; 158 } 159 160 static jintArray 161 android_mtp_MtpDevice_get_storage_ids(JNIEnv *env, jobject thiz) 162 { 163 MtpDevice* device = get_device_from_object(env, thiz); 164 if (!device) 165 return NULL; 166 MtpStorageIDList* storageIDs = device->getStorageIDs(); 167 if (!storageIDs) 168 return NULL; 169 170 int length = storageIDs->size(); 171 jintArray array = env->NewIntArray(length); 172 // FIXME is this cast safe? 173 env->SetIntArrayRegion(array, 0, length, (const jint *)storageIDs->array()); 174 175 delete storageIDs; 176 return array; 177 } 178 179 static jobject 180 android_mtp_MtpDevice_get_storage_info(JNIEnv *env, jobject thiz, jint storageID) 181 { 182 MtpDevice* device = get_device_from_object(env, thiz); 183 if (!device) 184 return NULL; 185 MtpStorageInfo* storageInfo = device->getStorageInfo(storageID); 186 if (!storageInfo) 187 return NULL; 188 189 jobject info = env->NewObject(clazz_storageInfo, constructor_storageInfo); 190 if (info == NULL) { 191 ALOGE("Could not create a MtpStorageInfo object"); 192 delete storageInfo; 193 return NULL; 194 } 195 196 if (storageInfo->mStorageID) 197 env->SetIntField(info, field_storageInfo_storageId, storageInfo->mStorageID); 198 if (storageInfo->mMaxCapacity) 199 env->SetLongField(info, field_storageInfo_maxCapacity, storageInfo->mMaxCapacity); 200 if (storageInfo->mFreeSpaceBytes) 201 env->SetLongField(info, field_storageInfo_freeSpace, storageInfo->mFreeSpaceBytes); 202 if (storageInfo->mStorageDescription) 203 env->SetObjectField(info, field_storageInfo_description, 204 env->NewStringUTF(storageInfo->mStorageDescription)); 205 if (storageInfo->mVolumeIdentifier) 206 env->SetObjectField(info, field_storageInfo_volumeIdentifier, 207 env->NewStringUTF(storageInfo->mVolumeIdentifier)); 208 209 delete storageInfo; 210 return info; 211 } 212 213 static jintArray 214 android_mtp_MtpDevice_get_object_handles(JNIEnv *env, jobject thiz, 215 jint storageID, jint format, jint objectID) 216 { 217 MtpDevice* device = get_device_from_object(env, thiz); 218 if (!device) 219 return NULL; 220 MtpObjectHandleList* handles = device->getObjectHandles(storageID, format, objectID); 221 if (!handles) 222 return NULL; 223 224 int length = handles->size(); 225 jintArray array = env->NewIntArray(length); 226 // FIXME is this cast safe? 227 env->SetIntArrayRegion(array, 0, length, (const jint *)handles->array()); 228 229 delete handles; 230 return array; 231 } 232 233 static jobject 234 android_mtp_MtpDevice_get_object_info(JNIEnv *env, jobject thiz, jint objectID) 235 { 236 MtpDevice* device = get_device_from_object(env, thiz); 237 if (!device) 238 return NULL; 239 MtpObjectInfo* objectInfo = device->getObjectInfo(objectID); 240 if (!objectInfo) 241 return NULL; 242 jobject info = env->NewObject(clazz_objectInfo, constructor_objectInfo); 243 if (info == NULL) { 244 ALOGE("Could not create a MtpObjectInfo object"); 245 delete objectInfo; 246 return NULL; 247 } 248 249 if (objectInfo->mHandle) 250 env->SetIntField(info, field_objectInfo_handle, objectInfo->mHandle); 251 if (objectInfo->mStorageID) 252 env->SetIntField(info, field_objectInfo_storageId, objectInfo->mStorageID); 253 if (objectInfo->mFormat) 254 env->SetIntField(info, field_objectInfo_format, objectInfo->mFormat); 255 if (objectInfo->mProtectionStatus) 256 env->SetIntField(info, field_objectInfo_protectionStatus, objectInfo->mProtectionStatus); 257 if (objectInfo->mCompressedSize) 258 env->SetIntField(info, field_objectInfo_compressedSize, objectInfo->mCompressedSize); 259 if (objectInfo->mThumbFormat) 260 env->SetIntField(info, field_objectInfo_thumbFormat, objectInfo->mThumbFormat); 261 if (objectInfo->mThumbCompressedSize) 262 env->SetIntField(info, field_objectInfo_thumbCompressedSize, objectInfo->mThumbCompressedSize); 263 if (objectInfo->mThumbPixWidth) 264 env->SetIntField(info, field_objectInfo_thumbPixWidth, objectInfo->mThumbPixWidth); 265 if (objectInfo->mThumbPixHeight) 266 env->SetIntField(info, field_objectInfo_thumbPixHeight, objectInfo->mThumbPixHeight); 267 if (objectInfo->mImagePixWidth) 268 env->SetIntField(info, field_objectInfo_imagePixWidth, objectInfo->mImagePixWidth); 269 if (objectInfo->mImagePixHeight) 270 env->SetIntField(info, field_objectInfo_imagePixHeight, objectInfo->mImagePixHeight); 271 if (objectInfo->mImagePixDepth) 272 env->SetIntField(info, field_objectInfo_imagePixDepth, objectInfo->mImagePixDepth); 273 if (objectInfo->mParent) 274 env->SetIntField(info, field_objectInfo_parent, objectInfo->mParent); 275 if (objectInfo->mAssociationType) 276 env->SetIntField(info, field_objectInfo_associationType, objectInfo->mAssociationType); 277 if (objectInfo->mAssociationDesc) 278 env->SetIntField(info, field_objectInfo_associationDesc, objectInfo->mAssociationDesc); 279 if (objectInfo->mSequenceNumber) 280 env->SetIntField(info, field_objectInfo_sequenceNumber, objectInfo->mSequenceNumber); 281 if (objectInfo->mName) 282 env->SetObjectField(info, field_objectInfo_name, env->NewStringUTF(objectInfo->mName)); 283 if (objectInfo->mDateCreated) 284 env->SetLongField(info, field_objectInfo_dateCreated, objectInfo->mDateCreated * 1000LL); 285 if (objectInfo->mDateModified) 286 env->SetLongField(info, field_objectInfo_dateModified, objectInfo->mDateModified * 1000LL); 287 if (objectInfo->mKeywords) 288 env->SetObjectField(info, field_objectInfo_keywords, 289 env->NewStringUTF(objectInfo->mKeywords)); 290 291 delete objectInfo; 292 return info; 293 } 294 295 struct get_object_callback_data { 296 JNIEnv *env; 297 jbyteArray array; 298 }; 299 300 static bool get_object_callback(void* data, int offset, int length, void* clientData) 301 { 302 get_object_callback_data* cbData = (get_object_callback_data *)clientData; 303 cbData->env->SetByteArrayRegion(cbData->array, offset, length, (jbyte *)data); 304 return true; 305 } 306 307 static jbyteArray 308 android_mtp_MtpDevice_get_object(JNIEnv *env, jobject thiz, jint objectID, jint objectSize) 309 { 310 MtpDevice* device = get_device_from_object(env, thiz); 311 if (!device) 312 return NULL; 313 314 jbyteArray array = env->NewByteArray(objectSize); 315 if (!array) { 316 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 317 return NULL; 318 } 319 320 get_object_callback_data data; 321 data.env = env; 322 data.array = array; 323 324 if (device->readObject(objectID, get_object_callback, objectSize, &data)) 325 return array; 326 return NULL; 327 } 328 329 static jbyteArray 330 android_mtp_MtpDevice_get_thumbnail(JNIEnv *env, jobject thiz, jint objectID) 331 { 332 MtpDevice* device = get_device_from_object(env, thiz); 333 if (!device) 334 return NULL; 335 336 int length; 337 void* thumbnail = device->getThumbnail(objectID, length); 338 if (! thumbnail) 339 return NULL; 340 jbyteArray array = env->NewByteArray(length); 341 env->SetByteArrayRegion(array, 0, length, (const jbyte *)thumbnail); 342 343 free(thumbnail); 344 return array; 345 } 346 347 static jboolean 348 android_mtp_MtpDevice_delete_object(JNIEnv *env, jobject thiz, jint object_id) 349 { 350 MtpDevice* device = get_device_from_object(env, thiz); 351 if (device && device->deleteObject(object_id)) { 352 return JNI_TRUE; 353 } else { 354 return JNI_FALSE; 355 } 356 } 357 358 static jlong 359 android_mtp_MtpDevice_get_parent(JNIEnv *env, jobject thiz, jint object_id) 360 { 361 MtpDevice* device = get_device_from_object(env, thiz); 362 if (device) 363 return (jlong)device->getParent(object_id); 364 else 365 return -1; 366 } 367 368 static jlong 369 android_mtp_MtpDevice_get_storage_id(JNIEnv *env, jobject thiz, jint object_id) 370 { 371 MtpDevice* device = get_device_from_object(env, thiz); 372 if (device) 373 return (jlong)device->getStorageID(object_id); 374 else 375 return -1; 376 } 377 378 static jboolean 379 android_mtp_MtpDevice_import_file(JNIEnv *env, jobject thiz, jint object_id, jstring dest_path) 380 { 381 MtpDevice* device = get_device_from_object(env, thiz); 382 if (device) { 383 const char *destPathStr = env->GetStringUTFChars(dest_path, NULL); 384 if (destPathStr == NULL) { 385 return JNI_FALSE; 386 } 387 388 jboolean result = device->readObject(object_id, destPathStr, AID_SDCARD_RW, 0664); 389 env->ReleaseStringUTFChars(dest_path, destPathStr); 390 return result; 391 } 392 393 return JNI_FALSE; 394 } 395 396 // ---------------------------------------------------------------------------- 397 398 static JNINativeMethod gMethods[] = { 399 {"native_open", "(Ljava/lang/String;I)Z", 400 (void *)android_mtp_MtpDevice_open}, 401 {"native_close", "()V", (void *)android_mtp_MtpDevice_close}, 402 {"native_get_device_info", "()Landroid/mtp/MtpDeviceInfo;", 403 (void *)android_mtp_MtpDevice_get_device_info}, 404 {"native_get_storage_ids", "()[I", (void *)android_mtp_MtpDevice_get_storage_ids}, 405 {"native_get_storage_info", "(I)Landroid/mtp/MtpStorageInfo;", 406 (void *)android_mtp_MtpDevice_get_storage_info}, 407 {"native_get_object_handles","(III)[I", 408 (void *)android_mtp_MtpDevice_get_object_handles}, 409 {"native_get_object_info", "(I)Landroid/mtp/MtpObjectInfo;", 410 (void *)android_mtp_MtpDevice_get_object_info}, 411 {"native_get_object", "(II)[B",(void *)android_mtp_MtpDevice_get_object}, 412 {"native_get_thumbnail", "(I)[B",(void *)android_mtp_MtpDevice_get_thumbnail}, 413 {"native_delete_object", "(I)Z", (void *)android_mtp_MtpDevice_delete_object}, 414 {"native_get_parent", "(I)J", (void *)android_mtp_MtpDevice_get_parent}, 415 {"native_get_storage_id", "(I)J", (void *)android_mtp_MtpDevice_get_storage_id}, 416 {"native_import_file", "(ILjava/lang/String;)Z", 417 (void *)android_mtp_MtpDevice_import_file}, 418 }; 419 420 int register_android_mtp_MtpDevice(JNIEnv *env) 421 { 422 jclass clazz; 423 424 ALOGD("register_android_mtp_MtpDevice\n"); 425 426 clazz = env->FindClass("android/mtp/MtpDeviceInfo"); 427 if (clazz == NULL) { 428 ALOGE("Can't find android/mtp/MtpDeviceInfo"); 429 return -1; 430 } 431 constructor_deviceInfo = env->GetMethodID(clazz, "<init>", "()V"); 432 if (constructor_deviceInfo == NULL) { 433 ALOGE("Can't find android/mtp/MtpDeviceInfo constructor"); 434 return -1; 435 } 436 field_deviceInfo_manufacturer = env->GetFieldID(clazz, "mManufacturer", "Ljava/lang/String;"); 437 if (field_deviceInfo_manufacturer == NULL) { 438 ALOGE("Can't find MtpDeviceInfo.mManufacturer"); 439 return -1; 440 } 441 field_deviceInfo_model = env->GetFieldID(clazz, "mModel", "Ljava/lang/String;"); 442 if (field_deviceInfo_model == NULL) { 443 ALOGE("Can't find MtpDeviceInfo.mModel"); 444 return -1; 445 } 446 field_deviceInfo_version = env->GetFieldID(clazz, "mVersion", "Ljava/lang/String;"); 447 if (field_deviceInfo_version == NULL) { 448 ALOGE("Can't find MtpDeviceInfo.mVersion"); 449 return -1; 450 } 451 field_deviceInfo_serialNumber = env->GetFieldID(clazz, "mSerialNumber", "Ljava/lang/String;"); 452 if (field_deviceInfo_serialNumber == NULL) { 453 ALOGE("Can't find MtpDeviceInfo.mSerialNumber"); 454 return -1; 455 } 456 clazz_deviceInfo = (jclass)env->NewGlobalRef(clazz); 457 458 clazz = env->FindClass("android/mtp/MtpStorageInfo"); 459 if (clazz == NULL) { 460 ALOGE("Can't find android/mtp/MtpStorageInfo"); 461 return -1; 462 } 463 constructor_storageInfo = env->GetMethodID(clazz, "<init>", "()V"); 464 if (constructor_storageInfo == NULL) { 465 ALOGE("Can't find android/mtp/MtpStorageInfo constructor"); 466 return -1; 467 } 468 field_storageInfo_storageId = env->GetFieldID(clazz, "mStorageId", "I"); 469 if (field_storageInfo_storageId == NULL) { 470 ALOGE("Can't find MtpStorageInfo.mStorageId"); 471 return -1; 472 } 473 field_storageInfo_maxCapacity = env->GetFieldID(clazz, "mMaxCapacity", "J"); 474 if (field_storageInfo_maxCapacity == NULL) { 475 ALOGE("Can't find MtpStorageInfo.mMaxCapacity"); 476 return -1; 477 } 478 field_storageInfo_freeSpace = env->GetFieldID(clazz, "mFreeSpace", "J"); 479 if (field_storageInfo_freeSpace == NULL) { 480 ALOGE("Can't find MtpStorageInfo.mFreeSpace"); 481 return -1; 482 } 483 field_storageInfo_description = env->GetFieldID(clazz, "mDescription", "Ljava/lang/String;"); 484 if (field_storageInfo_description == NULL) { 485 ALOGE("Can't find MtpStorageInfo.mDescription"); 486 return -1; 487 } 488 field_storageInfo_volumeIdentifier = env->GetFieldID(clazz, "mVolumeIdentifier", "Ljava/lang/String;"); 489 if (field_storageInfo_volumeIdentifier == NULL) { 490 ALOGE("Can't find MtpStorageInfo.mVolumeIdentifier"); 491 return -1; 492 } 493 clazz_storageInfo = (jclass)env->NewGlobalRef(clazz); 494 495 clazz = env->FindClass("android/mtp/MtpObjectInfo"); 496 if (clazz == NULL) { 497 ALOGE("Can't find android/mtp/MtpObjectInfo"); 498 return -1; 499 } 500 constructor_objectInfo = env->GetMethodID(clazz, "<init>", "()V"); 501 if (constructor_objectInfo == NULL) { 502 ALOGE("Can't find android/mtp/MtpObjectInfo constructor"); 503 return -1; 504 } 505 field_objectInfo_handle = env->GetFieldID(clazz, "mHandle", "I"); 506 if (field_objectInfo_handle == NULL) { 507 ALOGE("Can't find MtpObjectInfo.mHandle"); 508 return -1; 509 } 510 field_objectInfo_storageId = env->GetFieldID(clazz, "mStorageId", "I"); 511 if (field_objectInfo_storageId == NULL) { 512 ALOGE("Can't find MtpObjectInfo.mStorageId"); 513 return -1; 514 } 515 field_objectInfo_format = env->GetFieldID(clazz, "mFormat", "I"); 516 if (field_objectInfo_format == NULL) { 517 ALOGE("Can't find MtpObjectInfo.mFormat"); 518 return -1; 519 } 520 field_objectInfo_protectionStatus = env->GetFieldID(clazz, "mProtectionStatus", "I"); 521 if (field_objectInfo_protectionStatus == NULL) { 522 ALOGE("Can't find MtpObjectInfo.mProtectionStatus"); 523 return -1; 524 } 525 field_objectInfo_compressedSize = env->GetFieldID(clazz, "mCompressedSize", "I"); 526 if (field_objectInfo_compressedSize == NULL) { 527 ALOGE("Can't find MtpObjectInfo.mCompressedSize"); 528 return -1; 529 } 530 field_objectInfo_thumbFormat = env->GetFieldID(clazz, "mThumbFormat", "I"); 531 if (field_objectInfo_thumbFormat == NULL) { 532 ALOGE("Can't find MtpObjectInfo.mThumbFormat"); 533 return -1; 534 } 535 field_objectInfo_thumbCompressedSize = env->GetFieldID(clazz, "mThumbCompressedSize", "I"); 536 if (field_objectInfo_thumbCompressedSize == NULL) { 537 ALOGE("Can't find MtpObjectInfo.mThumbCompressedSize"); 538 return -1; 539 } 540 field_objectInfo_thumbPixWidth = env->GetFieldID(clazz, "mThumbPixWidth", "I"); 541 if (field_objectInfo_thumbPixWidth == NULL) { 542 ALOGE("Can't find MtpObjectInfo.mThumbPixWidth"); 543 return -1; 544 } 545 field_objectInfo_thumbPixHeight = env->GetFieldID(clazz, "mThumbPixHeight", "I"); 546 if (field_objectInfo_thumbPixHeight == NULL) { 547 ALOGE("Can't find MtpObjectInfo.mThumbPixHeight"); 548 return -1; 549 } 550 field_objectInfo_imagePixWidth = env->GetFieldID(clazz, "mImagePixWidth", "I"); 551 if (field_objectInfo_imagePixWidth == NULL) { 552 ALOGE("Can't find MtpObjectInfo.mImagePixWidth"); 553 return -1; 554 } 555 field_objectInfo_imagePixHeight = env->GetFieldID(clazz, "mImagePixHeight", "I"); 556 if (field_objectInfo_imagePixHeight == NULL) { 557 ALOGE("Can't find MtpObjectInfo.mImagePixHeight"); 558 return -1; 559 } 560 field_objectInfo_imagePixDepth = env->GetFieldID(clazz, "mImagePixDepth", "I"); 561 if (field_objectInfo_imagePixDepth == NULL) { 562 ALOGE("Can't find MtpObjectInfo.mImagePixDepth"); 563 return -1; 564 } 565 field_objectInfo_parent = env->GetFieldID(clazz, "mParent", "I"); 566 if (field_objectInfo_parent == NULL) { 567 ALOGE("Can't find MtpObjectInfo.mParent"); 568 return -1; 569 } 570 field_objectInfo_associationType = env->GetFieldID(clazz, "mAssociationType", "I"); 571 if (field_objectInfo_associationType == NULL) { 572 ALOGE("Can't find MtpObjectInfo.mAssociationType"); 573 return -1; 574 } 575 field_objectInfo_associationDesc = env->GetFieldID(clazz, "mAssociationDesc", "I"); 576 if (field_objectInfo_associationDesc == NULL) { 577 ALOGE("Can't find MtpObjectInfo.mAssociationDesc"); 578 return -1; 579 } 580 field_objectInfo_sequenceNumber = env->GetFieldID(clazz, "mSequenceNumber", "I"); 581 if (field_objectInfo_sequenceNumber == NULL) { 582 ALOGE("Can't find MtpObjectInfo.mSequenceNumber"); 583 return -1; 584 } 585 field_objectInfo_name = env->GetFieldID(clazz, "mName", "Ljava/lang/String;"); 586 if (field_objectInfo_name == NULL) { 587 ALOGE("Can't find MtpObjectInfo.mName"); 588 return -1; 589 } 590 field_objectInfo_dateCreated = env->GetFieldID(clazz, "mDateCreated", "J"); 591 if (field_objectInfo_dateCreated == NULL) { 592 ALOGE("Can't find MtpObjectInfo.mDateCreated"); 593 return -1; 594 } 595 field_objectInfo_dateModified = env->GetFieldID(clazz, "mDateModified", "J"); 596 if (field_objectInfo_dateModified == NULL) { 597 ALOGE("Can't find MtpObjectInfo.mDateModified"); 598 return -1; 599 } 600 field_objectInfo_keywords = env->GetFieldID(clazz, "mKeywords", "Ljava/lang/String;"); 601 if (field_objectInfo_keywords == NULL) { 602 ALOGE("Can't find MtpObjectInfo.mKeywords"); 603 return -1; 604 } 605 clazz_objectInfo = (jclass)env->NewGlobalRef(clazz); 606 607 clazz = env->FindClass("android/mtp/MtpDevice"); 608 if (clazz == NULL) { 609 ALOGE("Can't find android/mtp/MtpDevice"); 610 return -1; 611 } 612 field_context = env->GetFieldID(clazz, "mNativeContext", "J"); 613 if (field_context == NULL) { 614 ALOGE("Can't find MtpDevice.mNativeContext"); 615 return -1; 616 } 617 618 return AndroidRuntime::registerNativeMethods(env, 619 "android/mtp/MtpDevice", gMethods, NELEM(gMethods)); 620 } 621
