如何自定义首选项以通过 XML 显示时间选择器小部件
首先我想说的是，我现在只在 Android 上工作了大约一周，所以我想你可以认为我是一个新手！因此，如果解决方案过于简单，我提前道歉，但我可以向您保证，我在发布到这里之前已经完成了研究，并且到目前为止还没有找到合适的解决方案（或者也许我已经但没有完全意识到这一点） ！）。尽管如此，还是有很多乐趣，只是想解决这个问题并学习，所以这里...
应用程序
我正在开发的应用程序本质上是一个提醒服务，我目前正在开发<强>首选项屏幕。
问题
我希望用户能够指定每天提醒他/她的时间。我希望通过首选项屏幕完成此选择。这是我的首选项屏幕到目前为止的样子...
我的问题
理想情况下，每当用户选择“闹钟时间”首选项时，我希望出现以下内容（这是来自另一个应用程序 - PillReminder 的首选项的屏幕截图）。
时间选择器小部件的偏好（取自另一个应用程序 - “PillReminder”）
我的问题是，创建这个的最佳方法是什么？我确实希望仅使用 XML 保留应用程序的所有视觉方面，因此我不需要 Java 解决方案。这是可能的还是我完全偏离了轨道？我听说过的其他潜在解决方案是使用主题、警报对话框和扩展首选项类等。也许其中一些是正确的，但我不确定。
任何帮助将不胜感激，谢谢！ :)
Firstly I'd like to say that I have only been working on Android for about a week now, so I guess you can consider me a newb! Therefore I apologise in advance if the solution is overly simple, but I can assure you that I have done my research before posting here, and haven't found an appropriate solution as of yet (or maybe I have and don't fully realise it!). Nonetheless, having lots of fun and just want to solve this problem and learn, so here goes...
The Application
The application I am developing is essentially a reminder service, and I am currently working on the preferences screen.
The Problem
I would like the user to be able to specifiy a time when he/she will be reminded daily. I want this selection to be done via the preferences screen. This is how my preferences screen looks so far...
My Question
Ideally, whenever the user selects the "Alarm Time" preference, I would like the following to appear (this is a screenshot of a preference from another application - PillReminder).
Preference with Time Picker widget (taken from another app - "PillReminder")
My question is, what is the best way to create this? I really want to keep all the visual aspects of the application using only XML, therefore I don't want a Java solution. Is this possible or am I completely off track? Other potential solutions I have heard of are using themes, alert dialogs and extending preference classes etc. Maybe some of these are correct, but I am unsure.
Any help would be greatly appreciated, thanks! :)
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这可能是一个自定义的
DialogPreference，其中恰好有一个TimePicker。像这样的自定义首选项无法在 XML 中定义。您需要创建
DialogPreference的子类，定义对话框中的内容，以及如何将对话框的内容存储到SharedPreference值（以及从中检索）。我的 ColorMixer CWAC 项目 有一个
ColorPreference，您可能希望检查一下。That is probably a custom
DialogPreferencethat happens to have aTimePickerin it.Custom preferences like this cannot be defined in XML. You will need to create a subclass of
DialogPreference, define what goes in the dialog, and how the dialog's contents can be stored to (and retrieved from) aSharedPreferencevalue.My ColorMixer CWAC project has a
ColorPreferencethat you may wish to examine.