使用子活动显示 MapView
我有一个主要活动。它的 main.xml 生成一个包含滑块的视图，单击该滑块即可显示某些内容区域。在这个区域我想显示一张地图。所以我需要第二项活动。我可以调用子活动，但我希望它显示在 main.xml 的滑块区域中，但是地图有自己的 mapview.xml。
有什么想法吗？
I have a main activity. its main.xml generates a view that holds a slider, which on click, reveles some area for conent. In this area I want to display a map. so I need a second activity. I am able to call the sub activity but I want it to be displayed in the area of the slider of the main.xml, however the map has its own mapview.xml.
any ideas?
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虽然您确实需要 MapActivity 才能显示地图，但根据您的描述，我不相信您实际上嵌套了 Activity。 MapActivity 并不要求 XML 中不存在包含地图的内容区域。
如果您确实想使用 MapActivity 作为子活动，那么您应该使用
活动组。典型的例子是 TabActivity，它可以有多个 Activity（每个选项卡中一个） - 您可以查看 TabActivity 的源代码来确定这是如何完成的。While it's true that you need a MapActivity in order to display a map, from what you describe I'm not convinced you actually nest Activities. There's nothing about MapActivity that requires that the XML not already have content area with a map in it.
If you really do want to use a MapActivity as a sub-activity, then you should use an
ActivityGroup. The classic example of this is a TabActivity, which can have multiple Activities (one in each tab) - you could look at TabActivity's source code to determine how this is done.