范围内不能访问该类型的封闭实例 [英] No enclosing instance of the type is accessible in scope

查看:652
本文介绍了范围内不能访问该类型的封闭实例的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有这段代码:

Thread thread = new Thread(null, vieworders, "MagentoBackground");
thread.start();
m_progressDialog = ProgressDialog.show(SoftwarePassionView.this, 
    "Please wait...", "Retrieving data...", true);

这会产生以下编译错误:

This gives the following compilation error:


在范围内无法访问类型为SoftwarePassionView的封闭实例

No enclosing Instance of the type SoftwarePassionView is accessible in scope

这是如何引起的,我该怎么办?解决它?

How is this caused and how can I solve it?

推荐答案

表达式 SoftwarePassionView.this 只有在示例代码段中的代码位于非静态内部/嵌套类中,其中一个封闭类是 SoftwarePassionView 。它说给我封闭的 SoftwarePassionView 实例

The expression SoftwarePassionView.this only makes sense if the code in the example snippet is found in a non-static inner / nested class, and one of the enclosing classes is SoftwarePassionView. It says "give me the enclosing SoftwarePassionView instance".

如果此代码是不是在那个上下文中,(因为编译器错误会指示),你需要用普通的变量名替换表达式,或者用方法调用来引用一些 SoftwarePassionView 对象。

If this code is not in that context, (as the compiler error would indicate), you need to replace the expression with a normal variable name, or method call that gives a reference to some SoftwarePassionView object.

对于记录,这是一个例子,其中 SoftwarePassionView.this 不会出现编译错误:

For the record, here is an example where SoftwarePassionView.this wouldn't be a compilation error:

public class SoftwarePassionView {

    public class Inner {
        ...
        public void doIt() {
            Thread thread = new Thread(null, vieworders, "MagentoBackground");
            thread.start();
            m_progressDialog = ProgressDialog.show(SoftwarePassionView.this, 
                  "Please wait...", "Retrieving data...", true);
        }
    }
}

这篇关于范围内不能访问该类型的封闭实例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!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆