谷歌Android系统逆天操作 —— 监控 “为爱鼓掌” 频率?

出品 | OSC开源社区(ID:oschina2013)

今天小编在网上冲浪看到 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。

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:

  • 1:已做安全保护

  • 0:未知

  • 2:无安全保护



公有方法主要有 getProtectionUsed()、getTime()、getZoneOffset()。


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:
/* * 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.IntDefimport androidx.annotation.RestrictToimport androidx.health.connect.client.records.metadata.Metadataimport java.time.Instantimport 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?



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