Java 语法解释——getMenuInflater() [英] Java syntax explanation - getMenuInflater()

问题描述

刚刚下载了 android studio，我正在使用 big nerd ranch 的 android 编程指南来学习绳索.

Just downloaded android studio, and I am using big nerd ranch's guide to android programming to learn the ropes.

当您启动 android studio 时，此代码已在主活动文件中:

When you start android studio this code is already in the main activity file:

 @Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    **getMenuInflater().inflate(R.menu.menu_quiz, menu);**
    return true;
}

我不明白 getMenuInflater 行.在我对 java 的短暂体验中，当使用句点将两者分开时，例如在 dog.bark() 中，只有一个对象出现在方法之前.这里看起来这行意味着调用在 getMenuInflater 方法中定义的 inflate 方法.但是，我查看了getMenuInflater()的源码，其body中并没有inflate方法.

I don't understand the getMenuInflater line. In my short experience with java only an object comes before a method when using a period to separate the two such as in dog.bark(). Here it looks like the line means call the inflate method which is defined within the getMenuInflater method. However, I checked the source code for getMenuInflater(), and there is no inflate method in its body.

有人可以为我揭开这一行中的语法的神秘面纱吗?

Can somebody demystify the syntax in this line for me?

推荐答案

getMenuInflater().inflate(R.menu.menu_quiz, menu); 是一个简短的形式:>

The line getMenuInflater().inflate(R.menu.menu_quiz, menu); is a short form of this:

MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_quiz, menu)

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