Android DataBinding 从哪里获取上下文?

问题描述

我有 TextView 用于显示时间.我想使用Android的DataBinding插件.

I have TextView for showing time. I want to use Android's DataBinding plugin.

对于格式化时间，我使用 DateUtils.formatDateTime(context, int, int) 方法，该方法采用 Context 实例.是否可以获取上下文包含元素?还是我必须使用老派的方式?

For formatting time I am using DateUtils.formatDateTime(context, int, int) method which takes Context instance. Is it possible to get context include element? Or do I have to use old school way?

谢谢

推荐答案

我想我应该回答而不是发表评论.rc2 发布后，您将有更多选择.在 rc1 中，您可以将变量中的上下文传递给 Binding，然后将其作为参数传递给方法.或者，您可以为数据绑定创建自定义属性:

Thought I should answer instead of putting in a comment. You'll have more options when rc2 is released. In rc1, you can pass the context in a variable to the Binding, then pass it as a parameter to the method. Alternatively, you can create a custom attribute for data binding:

@BindingAdapter({"timeMillis", "dateFlags"})
public static void setDateText(TextView view, int timeMillis, int dateFlags) {
    view.setText(DateUtils.formatDateTime(view.getContext(), timeMillis,
                 dateFlags));
}

然后在你的 TextView 中使用它:

And then use it in your TextView:

<TextView ... app:timeMillis="@{timeVar}" app:dateFlags="@{dateFlags}"/>

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