如何关闭一个Android alertdialog [英] How do I close an Android alertdialog

问题描述

我正在开发一个测验，我需要的用户，然后再继续回答所有的问题。当用户没有回答所有的问题，我展示了一个简单alertdialog通知他或她。问题是，无论我做什么，我不能让alertdialog关闭。为什么不dialog.cancel工作'这是code：？

  AlertDialog.Builder广告=新AlertDialog.Builder（本）;
ad.setTitle（未答复的问题）;
ad.setMessage（你还没有回答所有的问题。）;
ad.setPositiveButton（OK，新DialogInterface.OnClickListener（）{
   公共无效的onClick（DialogInterface对话框，INT ID）{
     dialog.cancel（）;
}
}）;
ad.show（）;
 

解决方案

在 AlertDialog.Builder 本身并不包含辞退（）或取消（）方法。

这是一个方便的类来帮助你创建一个对话框，至极是否有获得这些方法。

下面是一个例子：

  AlertDialog.Builder建设者=新AlertDialog.Builder（本）;

AlertDialog警报= builder.create（）;

alert.show（）;
 

您可以再调用 alert.cancel（）方法警觉（而不是制造商）

I am developing a quiz and I need the user to answer all the questions before proceeding. When the user has not answered all the questions I display a simple alertdialog informing him or her. The problem is whatever I do I can't get the alertdialog to close. Why isn't dialog.cancel working?`This is the code:

AlertDialog.Builder ad = new AlertDialog.Builder(this);  
ad.setTitle("Unanswered Questions");  
ad.setMessage("You have not answered all the questions.");   
ad.setPositiveButton("OK", new DialogInterface.OnClickListener() {  
   public void onClick(DialogInterface dialog, int id) {  
     dialog.cancel(); 
}  
});  
ad.show(); 

解决方案

The AlertDialog.Builder itself does not contain a dismiss() or cancel() method.

It is a convenience class to help you create a Dialog, wich DOES have access to those methods.

Here is an example:

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

AlertDialog alert = builder.create();

alert.show();

you can then call the alert.cancel() method on the alert (not the builder)

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