谷歌地图版本2 - 更新信息的窗口 [英] Google Maps Version 2 - Updating information windows

问题描述

我们知道在谷歌地图机器人版本2中，定制的信息的窗口，是转换为图像的图。其实谷歌aftre返回您查看视图转换为图像的再出示给信息窗口。

As we know in google maps android version 2, a custom information windows, is a view that converts to an image. Actually google aftre you return you view converts the view to a image an then show it to the info windows.

但我想说明下载从互联网到我的信息窗口的图像。其实，我想，在此之前下载完整展现一个进度条到我的信息窗口，并在其后compeleted更新信息窗口，通过这个机制我该怎么办呢？

But I want to show images downloading from internet to my infowindow. Actually, I want that before that download complete show an progress bar to my infowindows and after it compeleted update info windows, by this mechanism how I can do this?

推荐答案

• 有一个包含INT进步和位图实际图像模型对象。


• 启动某种开始后台操作（如的AsyncTask ）至下载图片。

从 AsyncTask.onProgressUpdate 。
• 更新模式的进步
  
• 更新模型从 AsyncTask.onPostExecute 。
图片

• 有模型观察者（见观察partern ）。


• 如果您保持的AsyncTask （或活动的任何其他类型的发的情况下，不要忘了取消它，你也可以跳过观察者模式。


• 保存参考标记内 InfoWindowAdapter.getInfoWindow 显示信息窗口。说它 markerShowingInfoWindow 。


• 当您收到通知进度更新，

• Have a model object that contains int for progress and Bitmap for actual image.
• Start some kind of background operation started (e.g. AsyncTask) to download image.
• Update model's progress from AsyncTask.onProgressUpdate.
• Update model's image from AsyncTask.onPostExecute.
• Have an observer for model (see Observer partern).
• If you keep AsyncTask (or any other kind of Thread in Activity context, don't forget to cancel it and you may also skip observer pattern.
• Save reference to marker showing info window inside InfoWindowAdapter.getInfoWindow. Call it markerShowingInfoWindow.
• When you are notified of progress update,

电话：

if (markerShowingInfoWindow != null && markerShowingInfoWindow.isShowingInfoWindow()) {
    markerShowingInfoWindow.showInfoWindow();
}

要强制 InfoWindowAdapter.getInfoWindow 呼叫并创建的ViewGroup 包含进度和的ImageView

To force InfoWindowAdapter.getInfoWindow call and create ViewGroup containing ProgressBar and ImageView from progress and image values inside model.

像往常一样，翻译成C＃世界这一点。

As always, translate this into C# world.

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