安卓：startActivity（）从AlertDialog [英] Android: startActivity() from AlertDialog

问题描述

我想使用在AlertDialog一个按钮来查看的网页。

I am trying to use a Button in an AlertDialog to view a webpage.

问题是，这AlertDialog位于延伸ItemizedOverlay和不活动扩展一个类里面，所以Eclipse中强调，并提供了以下错误：

The problem is that this AlertDialog is located inside a class that extends ItemizedOverlay and doesn't extend Activity, so Eclipse underlines it and gives the following error:

该方法startActivity（）是未定义的类型新DialogInterface.OnClickListener（）{}

The method startActivity() is undefined for the type new DialogInterface.OnClickListener(){}

我想从PositiveButton，NeutralButton和NegativeButton开展活动，但我不能。

I would like to launch activities from the PositiveButton, NeutralButton and NegativeButton, but I am not able to.

如果你需要更多的背景下，主要活动是与一些ItemizedOverlay一个图形页面，我想用发射方向上的网页或者做另一个活动。

In case you need more context, the main Activity is a MapView with some ItemizedOverlay, and I would like to launch a webpage with directions or another activity that does that.

推荐答案

在其中包含与上下文对象作为参数快讯类构造一个构造函数。它分配给一个上下文变量。

Construct a constructor in the class which contains your alert with Context object as a parameter. Assign it to a Context variable.

使用上下文变量创建的意图。

Use this context variable for creating the intent.

Intent intent = new Intent(mContext, "Your next activity to be shown");//mContext is the Context variable over here.
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);    
mContext.startActivity(intent);

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