安卓：＆QUOT;构造AlertDialog.Builder（新View.OnClickListener（）{}）是未定义＆QUOT;错误 [英] Android : "The constructor AlertDialog.Builder(new View.OnClickListener(){}) is undefined" error

问题描述

我发现$ C $下建立一些inputboxes，他们是好的，但在这个code，它只是不工作：

I found the code for building some inputboxes and they are alright, but in this code it just doesnt work:

View.OnClickListener handleOnClick(final TextView textview) {
    return new View.OnClickListener() {
        public void onClick(View v) {

            if(editOn==1){
                textview.setText("neuer Text");

                AlertDialog.Builder alert = new AlertDialog.Builder(this);

                alert.setTitle("Hinzufügen");
                alert.setMessage("Name des neuen Eintrags");

                final EditText input = new EditText(this);
                alert.setView(input);

                alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int whichButton) {
                  String entryInput = input.getText().toString();
                  loadUp(entryInput,"0","1.1.2000");
                  }
                });

                alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                  public void onClick(DialogInterface dialog, int whichButton) {
                  }
                });


            }
        }
    };
}

它说，即构造AlertDialog.Builder（新View.OnClickListener（）{}）是未定义 每当我尝试插入的东西......新AlertDialog.Builder（这）;，那么我没有任何错误，我知道这一点。这种有指东西时，我用这个在菜单项code段，它工作得很好，但我想使用它时，我激活了我的编辑按钮（那是什么，如果（篇] == 1）表示），点击一个TextView，这是一种混乱，我认为，但我希望有人在那里知道我需要什么，并且可以帮助我！

It says, that "The constructor AlertDialog.Builder(new View.OnClickListener(){}) is undefined" Whenever i try to insert something in ".. new AlertDialog.Builder(this); , then i dont have any errors. I know, that "this" has to refer to something. When i used this code snippet on a menuitem, it works well, but i want to use it whenever i activated my edit button (thats what if(editOn==1) means) and click on a textview. This is kind of confusing i think, but i hope someone out there understand what i need and may help me !

推荐答案

正在试图发送一个clickListener实例 AlertDialog.Builder 的构造。

You are trying to send a clickListener instance to AlertDialog.Builder constructor.

AlertDialog.Builder alert = new AlertDialog.Builder(this);

尝试发送您的活动的实例。例如，如果你的活动名称为 MainActivity 你这样的：

AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);

或

AlertDialog.Builder alert = new AlertDialog.Builder(v.getContext());

编辑：：要显示一个 AlertDialog 利用其显示（）方法：

To show an AlertDialog use its show() method:

AlertDialog dialog = alert.create();
dialog.show();

<一个href="http://developer.android.com/reference/android/app/AlertDialog.Builder.html#AlertDialog.Builder%28android.content.Context%29">See文档

这篇关于安卓：＆QUOT;构造AlertDialog.Builder（新View.OnClickListener（）{}）是未定义＆QUOT;错误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！