刚刚网上冲浪看到 reddit 热门被吓一跳，还以为 Android 搞了个大新闻，瞬间标题都想好了：谷歌 Android 系统逆天操作——监控“为爱鼓掌”频率。
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https://www.reddit.com/r/programming/comments/16iy537/android_has_a_separate_class_and_documentation_to/
再看一眼，原来是说 Android 开发文档提供了用于记录性生活频率的 "SexualActivityRecord" 类。
https://developer.android.com/reference/androidx/health/connect/client/records/SexualActivityRecord
那就看看谷歌工程师如何编写这个类。
可以看到这个类总共有 3 个常量，代表了 Sex 是否采取保护措施：
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公有方法主要有 getProtectionUsed()、getTime()、getZoneOffset()。
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前面两个都能理解，获取保护措施情况和发生时间，但最后的 ZoneOffset 是啥意思？麻烦大佬们解答一下。
众所周知，Kotlin 早已成为 Android 官方支持的开发语言，所以这个类的代码也是 Kotlin 写的，总共不到 100 行：
SexualActivityRecord.kt
/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.health.connect.client.records
import androidx.annotation.IntDef
import androidx.annotation.RestrictTo
import androidx.health.connect.client.records.metadata.Metadata
import java.time.Instant
import java.time.ZoneOffset
/**
* Captures an occurrence of sexual activity. Each record is a single occurrence. ProtectionUsed
* field is optional.
*/
public class SexualActivityRecord(
override val time: Instant,
override val zoneOffset: ZoneOffset?,
/**
* Whether protection was used during sexual activity. Optional field, null if unknown. Allowed
* values: [Protection].
*
* @see Protection
*/
@property:Protections public val protectionUsed: Int = PROTECTION_USED_UNKNOWN,
override val metadata: Metadata = Metadata.EMPTY,
) : InstantaneousRecord {
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is SexualActivityRecord) return false
if (protectionUsed != other.protectionUsed) return false
if (time != other.time) return false
if (zoneOffset != other.zoneOffset) return false
if (metadata != other.metadata) return false
return true
}
override fun hashCode(): Int {
var result = protectionUsed
result = 31 * result + time.hashCode()
result = 31 * result + (zoneOffset?.hashCode() ?: 0)
result = 31 * result + metadata.hashCode()
return result
}
companion object {
const val PROTECTION_USED_UNKNOWN = 0
const val PROTECTION_USED_PROTECTED = 1
const val PROTECTION_USED_UNPROTECTED = 2
/** Internal mappings useful for interoperability between integers and strings. */
@RestrictTo(RestrictTo.Scope.LIBRARY)
@JvmField
val PROTECTION_USED_STRING_TO_INT_MAP: Map<String, Int> =
mapOf(
Protection.PROTECTED to PROTECTION_USED_PROTECTED,
Protection.UNPROTECTED to PROTECTION_USED_UNPROTECTED,
)
@RestrictTo(RestrictTo.Scope.LIBRARY)
@JvmField
val PROTECTION_USED_INT_TO_STRING_MAP = PROTECTION_USED_STRING_TO_INT_MAP.reverse()
}
/** Whether protection was used during sexual activity. */
internal object Protection {
const val PROTECTED = "protected"
const val UNPROTECTED = "unprotected"
}
/**
* Whether protection was used during sexual activity.
*/
@Retention(AnnotationRetention.SOURCE)
@IntDef(
value =
[
PROTECTION_USED_PROTECTED,
PROTECTION_USED_UNPROTECTED,
]
)
@RestrictTo(RestrictTo.Scope.LIBRARY)
annotation class Protections
}
好了，本次分享到此为止，欢迎大家各抒己见。如果让你来负责写这个类，会怎么实现？
