本文整理汇总了C++中MtpDataPacket::putEmptyString方法的典型用法代码示例。如果您正苦于以下问题：C++ MtpDataPacket::putEmptyString方法的具体用法？C++ MtpDataPacket::putEmptyString怎么用？C++ MtpDataPacket::putEmptyString使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MtpDataPacket的用法示例。
在下文中一共展示了MtpDataPacket::putEmptyString方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: writeValue
void MtpProperty::writeValue(MtpDataPacket& packet, MtpPropertyValue& value) {
MtpStringBuffer stringBuffer;
switch (mType) {
case MTP_TYPE_INT8:
case MTP_TYPE_AINT8:
packet.putInt8(value.u.i8);
break;
case MTP_TYPE_UINT8:
case MTP_TYPE_AUINT8:
packet.putUInt8(value.u.u8);
break;
case MTP_TYPE_INT16:
case MTP_TYPE_AINT16:
packet.putInt16(value.u.i16);
break;
case MTP_TYPE_UINT16:
case MTP_TYPE_AUINT16:
packet.putUInt16(value.u.u16);
break;
case MTP_TYPE_INT32:
case MTP_TYPE_AINT32:
packet.putInt32(value.u.i32);
break;
case MTP_TYPE_UINT32:
case MTP_TYPE_AUINT32:
packet.putUInt32(value.u.u32);
break;
case MTP_TYPE_INT64:
case MTP_TYPE_AINT64:
packet.putInt64(value.u.i64);
break;
case MTP_TYPE_UINT64:
case MTP_TYPE_AUINT64:
packet.putUInt64(value.u.u64);
break;
case MTP_TYPE_INT128:
case MTP_TYPE_AINT128:
packet.putInt128(value.u.i128);
break;
case MTP_TYPE_UINT128:
case MTP_TYPE_AUINT128:
packet.putUInt128(value.u.u128);
break;
case MTP_TYPE_STR:
if (value.str)
packet.putString(value.str);
else
packet.putEmptyString();
break;
default:
LOG(ERROR) << "unknown type "
<< std::hex << mType << std::dec
<< " in MtpProperty::writeValue";
}
}示例2: getObjectPropertyList
MtpResponseCode MyMtpDatabase::getObjectPropertyList(MtpObjectHandle handle,
uint32_t format, uint32_t property,
int groupCode, int depth,
MtpDataPacket& packet) {
JNIEnv* env = AndroidRuntime::getJNIEnv();
jobject list = env->CallObjectMethod(mDatabase, method_getObjectPropertyList,
(jlong)handle, (jint)format, (jlong)property, (jint)groupCode, (jint)depth);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
if (!list)
return MTP_RESPONSE_GENERAL_ERROR;
int count = env->GetIntField(list, field_mCount);
MtpResponseCode result = env->GetIntField(list, field_mResult);
packet.putUInt32(count);
if (count > 0) {
jintArray objectHandlesArray = (jintArray)env->GetObjectField(list, field_mObjectHandles);
jintArray propertyCodesArray = (jintArray)env->GetObjectField(list, field_mPropertyCodes);
jintArray dataTypesArray = (jintArray)env->GetObjectField(list, field_mDataTypes);
jlongArray longValuesArray = (jlongArray)env->GetObjectField(list, field_mLongValues);
jobjectArray stringValuesArray = (jobjectArray)env->GetObjectField(list, field_mStringValues);
jint* objectHandles = env->GetIntArrayElements(objectHandlesArray, 0);
jint* propertyCodes = env->GetIntArrayElements(propertyCodesArray, 0);
jint* dataTypes = env->GetIntArrayElements(dataTypesArray, 0);
jlong* longValues = (longValuesArray ? env->GetLongArrayElements(longValuesArray, 0) : NULL);
for (int i = 0; i < count; i++) {
packet.putUInt32(objectHandles[i]);
packet.putUInt16(propertyCodes[i]);
int type = dataTypes[i];
packet.putUInt16(type);
switch (type) {
case MTP_TYPE_INT8:
packet.putInt8(longValues[i]);
break;
case MTP_TYPE_UINT8:
packet.putUInt8(longValues[i]);
break;
case MTP_TYPE_INT16:
packet.putInt16(longValues[i]);
break;
case MTP_TYPE_UINT16:
packet.putUInt16(longValues[i]);
break;
case MTP_TYPE_INT32:
packet.putInt32(longValues[i]);
break;
case MTP_TYPE_UINT32:
packet.putUInt32(longValues[i]);
break;
case MTP_TYPE_INT64:
packet.putInt64(longValues[i]);
break;
case MTP_TYPE_UINT64:
packet.putUInt64(longValues[i]);
break;
case MTP_TYPE_INT128:
packet.putInt128(longValues[i]);
break;
case MTP_TYPE_UINT128:
packet.putUInt128(longValues[i]);
break;
case MTP_TYPE_STR: {
jstring value = (jstring)env->GetObjectArrayElement(stringValuesArray, i);
const char *valueStr = (value ? env->GetStringUTFChars(value, NULL) : NULL);
if (valueStr) {
packet.putString(valueStr);
env->ReleaseStringUTFChars(value, valueStr);
} else {
packet.putEmptyString();
}
env->DeleteLocalRef(value);
break;
}
default:
ALOGE("bad or unsupported data type in MyMtpDatabase::getObjectPropertyList");
break;
}
}
env->ReleaseIntArrayElements(objectHandlesArray, objectHandles, 0);
env->ReleaseIntArrayElements(propertyCodesArray, propertyCodes, 0);
env->ReleaseIntArrayElements(dataTypesArray, dataTypes, 0);
if (longValues)
env->ReleaseLongArrayElements(longValuesArray, longValues, 0);
env->DeleteLocalRef(objectHandlesArray);
env->DeleteLocalRef(propertyCodesArray);
env->DeleteLocalRef(dataTypesArray);
if (longValuesArray)
env->DeleteLocalRef(longValuesArray);
if (stringValuesArray)
env->DeleteLocalRef(stringValuesArray);
}
env->DeleteLocalRef(list);
checkAndClearExceptionFromCallback(env, __FUNCTION__);
return result;
}示例3: getObjectPropertyValue
MtpResponseCode MyMtpDatabase::getObjectPropertyValue(MtpObjectHandle handle,
MtpObjectProperty property,
MtpDataPacket& packet) {
JNIEnv* env = AndroidRuntime::getJNIEnv();
jobject list = env->CallObjectMethod(mDatabase, method_getObjectPropertyList,
(jlong)handle, 0, (jlong)property, 0, 0);
MtpResponseCode result = env->GetIntField(list, field_mResult);
int count = env->GetIntField(list, field_mCount);
if (result == MTP_RESPONSE_OK && count != 1)
result = MTP_RESPONSE_GENERAL_ERROR;
if (result == MTP_RESPONSE_OK) {
jintArray objectHandlesArray = (jintArray)env->GetObjectField(list, field_mObjectHandles);
jintArray propertyCodesArray = (jintArray)env->GetObjectField(list, field_mPropertyCodes);
jintArray dataTypesArray = (jintArray)env->GetObjectField(list, field_mDataTypes);
jlongArray longValuesArray = (jlongArray)env->GetObjectField(list, field_mLongValues);
jobjectArray stringValuesArray = (jobjectArray)env->GetObjectField(list, field_mStringValues);
jint* objectHandles = env->GetIntArrayElements(objectHandlesArray, 0);
jint* propertyCodes = env->GetIntArrayElements(propertyCodesArray, 0);
jint* dataTypes = env->GetIntArrayElements(dataTypesArray, 0);
jlong* longValues = (longValuesArray ? env->GetLongArrayElements(longValuesArray, 0) : NULL);
int type = dataTypes[0];
jlong longValue = (longValues ? longValues[0] : 0);
// special case date properties, which are strings to MTP
// but stored internally as a uint64
if (property == MTP_PROPERTY_DATE_MODIFIED || property == MTP_PROPERTY_DATE_ADDED) {
char date[20];
formatDateTime(longValue, date, sizeof(date));
packet.putString(date);
goto out;
}
// release date is stored internally as just the year
if (property == MTP_PROPERTY_ORIGINAL_RELEASE_DATE) {
char date[20];
snprintf(date, sizeof(date), "%04" PRId64 "0101T000000", longValue);
packet.putString(date);
goto out;
}
switch (type) {
case MTP_TYPE_INT8:
packet.putInt8(longValue);
break;
case MTP_TYPE_UINT8:
packet.putUInt8(longValue);
break;
case MTP_TYPE_INT16:
packet.putInt16(longValue);
break;
case MTP_TYPE_UINT16:
packet.putUInt16(longValue);
break;
case MTP_TYPE_INT32:
packet.putInt32(longValue);
break;
case MTP_TYPE_UINT32:
packet.putUInt32(longValue);
break;
case MTP_TYPE_INT64:
packet.putInt64(longValue);
break;
case MTP_TYPE_UINT64:
packet.putUInt64(longValue);
break;
case MTP_TYPE_INT128:
packet.putInt128(longValue);
break;
case MTP_TYPE_UINT128:
packet.putInt128(longValue);
break;
case MTP_TYPE_STR:
{
jstring stringValue = (jstring)env->GetObjectArrayElement(stringValuesArray, 0);
const char* str = (stringValue ? env->GetStringUTFChars(stringValue, NULL) : NULL);
if (stringValue) {
packet.putString(str);
env->ReleaseStringUTFChars(stringValue, str);
} else {
packet.putEmptyString();
}
env->DeleteLocalRef(stringValue);
break;
}
default:
ALOGE("unsupported type in getObjectPropertyValue\n");
result = MTP_RESPONSE_INVALID_OBJECT_PROP_FORMAT;
}
out:
env->ReleaseIntArrayElements(objectHandlesArray, objectHandles, 0);
env->ReleaseIntArrayElements(propertyCodesArray, propertyCodes, 0);
env->ReleaseIntArrayElements(dataTypesArray, dataTypes, 0);
if (longValues)
env->ReleaseLongArrayElements(longValuesArray, longValues, 0);
env->DeleteLocalRef(objectHandlesArray);
env->DeleteLocalRef(propertyCodesArray);
env->DeleteLocalRef(dataTypesArray);
//.........这里部分代码省略.........