Android : View.inflate 和 getLayoutInflater().inflate 有什么区别？

Question

真正的区别是什么：

return context.getLayoutInflater().inflate(R.layout.my_layout, null);

Inflate a new view hierarchy from the specified xml resource.

和

return View.inflate(context, R.layout.my_layout, null);

Inflate a view from an XML resource. This convenience method wraps the LayoutInflater class, which provides a full range of options for view inflation.

Answer 1

两者是一样的。第二个版本只是完成任务的一种方便而简短的方法。如果您查看 View.inflate() 方法的源代码，您会发现：

 /**
     * Inflate a view from an XML resource.  This convenience method wraps the {@link
     * LayoutInflater} class, which provides a full range of options for view inflation.
     *
     * @param context The Context object for your activity or application.
     * @param resource The resource ID to inflate
     * @param root A view group that will be the parent.  Used to properly inflate the
     * layout_* parameters.
     * @see LayoutInflater
     */
    public static View inflate(Context context, int resource, ViewGroup root) {
        LayoutInflater factory = LayoutInflater.from(context);
        return factory.inflate(resource, root);
    }

实际上在后端做同样的工作，你提到的第一种方法。

Answer 2

他们是一样的，做同样的事情

在View.javaclass

public static View inflate(Context context, @LayoutRes int resource, ViewGroup root) {
        LayoutInflater factory = LayoutInflater.from(context);
        return factory.inflate(resource, root);
    }

和 LayoutInflater.from(context) return LayoutInflator 对象。这与调用 getLayoutInflator() 方法相同。

public static LayoutInflater from(Context context) {
        LayoutInflater LayoutInflater =
                (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        if (LayoutInflater == null) {
            throw new AssertionError("LayoutInflater not found.");
        }
        return LayoutInflater;
    }

Android : View.inflate 和 getLayoutInflater().inflate 有什么区别？

Android : What is the difference between View.inflate and getLayoutInflater().inflate?

layout

android

layout-inflater