blocks|key|2948871|text|这是一种新的服务类型，根据系统条件(例如空闲、已插入)为计划运行的任务调用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2948872|来自JobScheduler的回调的|2948873|入口点。|blockquote|2948874|2948875|这是处理先前调度的异步请求的基类。您负责覆盖onStartJob(JobParameters)，这是您将实现作业逻辑的地方。|offset|length|style|CODE|2948876|2948877|您基本上创建了一个JobInfo对象来描述这些条件(使用JobInfo.Builder)，并设置必须执行的服务的组件名称。|2948878|要对它们进行调度，您需要可以使用Context.getSystemService(Context.JOB_SCHEDULER_SERVICE)访问的JobScheduler。|2948879|顺便说一句，L+Preview+Documentation+is+here，如果你不知道的话。|2948880|更新：这是关于JobService的文档：https://developer.android.com/reference/android/app/job/JobService.html|BOLD|2948881|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/preview/reference.html|1|https://developer.android.com/reference/android/app/job/JobService.html^0|0|0|0|0|M|P|0|0|9|7|S|F|0|G|1J|22|C|0|6|V|0|0|0|2|L|1Z|1|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|18|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|19|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1B|8|@$J|1C|K|1D|L|M]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1F|8|@$J|1G|K|1H|L|M]|$J|1I|K|1J|L|M]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1K|8|@$J|1L|K|1M|L|M]|$J|1N|K|1O|L|M]]|9|@]|A|$]]|$1|S|3|T|5|6|7|1P|8|@]|9|@$J|1Q|K|1R|1|1S]]|A|$]]|$1|U|3|V|5|6|7|1T|8|@$J|1U|K|1V|L|W]]|9|@$J|1W|K|1X|1|1Y]]|A|$]]|$1|X|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14]]|15|$5|10|11|12|A|$13|16]]]]

It's a new type of service, that is invoked for tasks that are scheduled to be run depending on system conditions (e.g. idle, plugged in).

<blockquote>
 Entry point for the callback from the JobScheduler.
 
 This is the base class that handles asynchronous requests that were
 previously scheduled. You are responsible for overriding
 <code>onStartJob(JobParameters)</code>, which is where you will implement your job
 logic.
</blockquote>

You basically create a <code>JobInfo</code> object that describes these conditions (with <code>JobInfo.Builder</code>) and set the component name of the service that must be executed.

To schedule them, you need the <code>JobScheduler</code>, which you can access with <code>Context.getSystemService(Context.JOB_SCHEDULER_SERVICE)</code>.

By the way, <a href="http://developer.android.com/preview/reference.html" rel="noreferrer">L Preview Documentation is here</a>, in case you didn't know about it.

UPDATE:
Here is the doc about JobService:
<a href="https://developer.android.com/reference/android/app/job/JobService.html" rel="noreferrer">https://developer.android.com/reference/android/app/job/JobService.html</a>

blocks|key|150675|text|你可以阅读这篇文章，以彻底理解这个主题-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|150676|https://medium.com/google-developers/scheduling-jobs-like-a-pro-with-jobscheduler-286ef8510129|offset|length|150677|150678|我们使用JobScheduler的目标是找到一种方法，让系统承担创建高性能应用程序的部分负担。作为一名开发人员，你要尽自己的一份力量来创建一个不会冻结的应用程序，但这并不总是意味着设备的电池寿命是健康的。因此，通过在系统级别引入JobScheduler，我们可以将类似的工作请求集中在一起进行批处理，这对电池和内存都有显著的改进。|blockquote|150679|150680|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|2M|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|X|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|C]]]]

You can go through this article, for a thorough understanding of the topic -

<a href="https://medium.com/google-developers/scheduling-jobs-like-a-pro-with-jobscheduler-286ef8510129" rel="nofollow noreferrer">https://medium.com/google-developers/scheduling-jobs-like-a-pro-with-jobscheduler-286ef8510129</a>

<blockquote>
 Our goal with JobScheduler was to find a way for the system to shoulder part of the burden of creating performant apps. As a developer, you do your part to create an app that doesn’t freeze, but that doesn’t always translate to the battery life of the device being healthy. So, by introducing JobScheduler at the system level, we can focus on batching similar work requests together, which results in a noticeable improvement for both battery and memory.
</blockquote>

I am inspecting the latest samples in Android-L developer SDK. There is a sample class in <code>android-L/ui/views/Clipping/ClippingBasic</code> called TestJobService. It extends from <a href="https://d.android.com/reference/android/app/job/JobService" rel="nofollow noreferrer">JobService</a>, which in turn extends from Service. I see that JobService is a class in android.jar, but I cannot find any information on it in the dev guides, nor in the Android sourcecode <a href="http://www.androidxref.com" rel="nofollow noreferrer">www.androidxref.com</a>. Has anybody seen this class or know what it's purpose is?

What is a JobService in Android

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我正在检查Android-L developer SDK中的最新示例。android-L/ui/views/Clipping/ClippingBasic中有一个名为TestJobService.的样例类它从扩展而来，而后者又从服务扩展而来。我看到JobService是android.jar中的一个类，但是我在开发指南和...

问什么是安卓系统中的JobService
EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问什么是安卓系统中的JobServiceEN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问什么是安卓系统中的JobService
EN