帮助进行代码布局
我希望我能正确解释这一点。 我正在制作一个 Android 应用程序，当您打开它时，它会连接到 JSON 服务器，提取数据（GPS 坐标）并根据收到的内容（View1）动态创建一个“菜单”。这将由几个按钮组成，单击这些按钮时，将加载 MapView (View2)，其中从 JSON 获取的坐标表示为地图上的标记。
我从 setContentView(R.layout.menu) 开始，然后获取数据，在 onbuttonClick 上加载 setContentView(R.layout.map) 并绘制标记。问题是，我有一个 onLocationChangedListener ，它通过代码来最初设置菜单。当它在 mapView 打开时尝试构建菜单时，我会强制关闭。不幸的是，此代码还会更新用户位置和叠加层的位置并重新绘制地图。
我的问题是：我是否可以对布局进行检查以说出类似 if (isActive) 的内容，以便仅在当前视图处于焦点状态时才能执行操作？
或者我应该放弃整个事情并以更好的布局重新开始？ （欢迎提出建议）
摘要::: 我有 2 个观点（菜单、地图）。需要在两者之间访问相同的数据。目前与 setContentView() 配合使用，但在非活动视图上执行操作时会强制关闭。
I hope I can explain this properly.
I'm making an android app that, when you open it, it connects to a JSON server, pulls down the data (GPS coords) and dynamically creates a "menu" based on what it received (View1). This will consist of a few buttons, which when clicked, will load a MapView (View2) with the coords gotten from the JSON represented as markers on the map.
I start off with setContentView(R.layout.menu) then get the data, onbuttonClick I load setContentView(R.layout.map) and draw the markers. The problem is, I have an onLocationChangedListener that goes through the code to set up the menu initially. When it tries to build the menu when the mapView is open, I get a force close. Unfortunately, this code also updates the user location and the locations of the overlays and re-draws the map.
My question is: Can I do a check on a layout to say something like if (isActive) so that I can perform actions only if the current view is in focus?
OR should I scrap the whole thing and start again with a better layout? (Suggestions welcome)
Summary::: I have 2 views (menu,map). Need access to same data across both. Currently works with setContentView() but gives me a Force Close when actions are performed on inactive view.
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如果我理解正确，您将使用 setContentView(someLayoutId) 来更改每次 Activity 显示的内容。这不是 Android 应用程序通常的工作方式。当您检索资源时，您需要一个根元素来引用它，这就是为什么当视图不“活动”时您会收到异常。
您还有其他几个选项可供评估：
If I understand correctly, you are using setContentView(someLayoutId) to change each time what the Activity is displaying. This is not the way android apps usually work. When you retrieve a resource, you need a root element to reference it, that's why you get the exceptions when the View is not "active".
You have several other options to evaluate: