在没有活动的地方调用 getLayoutInflater() [英] Call to getLayoutInflater() in places not in activity

问题描述

需要导入什么或如何在活动以外的地方调用 Layout inflater?

What does need to be imported or how can I call the Layout inflater in places other than activity?

public static void method(Context context){
    //this doesn't work the getLayoutInflater method could not be found
    LayoutInflater inflater = getLayoutInflater();
    // this also doesn't work 
    LayoutInflater inflater = context.getLayoutInflater();
}

我只能在活动中调用 getLayoutInflater，这是限制吗?如果我想创建自定义对话框并且想为其扩展视图怎么办，或者如果我想从服务中显示带有自定义视图的 Toast 消息怎么办，我只有来自服务的上下文我没有任何活动但我想显示自定义消息.

I am able to call getLayoutInflater only in activity, is that an restriction? What if I want to create custom dialog and I want to inflate view for it, or what if I want to have Toast message with custom view that is shown from a service, I only have the context from the service I do not have any activity but I want to show custom message.

我需要在代码中不在活动类中的地方使用充气器.

I need the inflater in places in the code that isn't in the activity class.

我该怎么做?

推荐答案

你可以使用这个外部活动 - 你只需要提供一个Context:

You can use this outside activities - all you need is to provide a Context:

LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );

然后为了检索不同的小部件，您需要对布局进行膨胀:

Then to retrieve your different widgets, you inflate a layout:

View view = inflater.inflate( R.layout.myNewInflatedLayout, null );
Button myButton = (Button) view.findViewById( R.id.myButton );

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编辑截至 2014 年 7 月

Davide 关于如何获取 LayoutInflater 的 answer 实际上比我的更正确(其中仍然有效).

Davide's answer on how to get the LayoutInflater is actually more correct than mine (which is still valid though).

这篇关于在没有活动的地方调用 getLayoutInflater()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！