如何显示进度当数据从Web加载？

问题描述

我在执行进度在我的Andr​​oid应用程序。在我的应用程序，我想显示进度条，当图像从网页加载装载机应停止所有图像加载后

I am implementing progressbar in my android app. In my app i want to display progressbar when images are loading from the web after loading all images the loader should be stopped.

我看到进度的一些例子，因为它正在显示的时间predefined周期。但我想进度条显示动态地依赖于从网络装载图像的时间。

I seen some example of progressbar in that it is displaying for predefined period of time. But i want the progressbar display dynamically depends on the time to load images from the web.

推荐答案

您768,16使用的。在Javadoc中有刚，你想要做什么的一个例子：

You shoud use an AsyncTask. The Javadoc for it has an example of just what you want to do :

private class DownloadFilesTask extends AsyncTask<URL, Integer, Long> {
     protected Long doInBackground(URL... urls) {
         int count = urls.length;
         long totalSize = 0;
         for (int i = 0; i < count; i++) {
             totalSize += Downloader.downloadFile(urls[i]);
             publishProgress((int) ((i / (float) count) * 100));
         }
         return totalSize;
     }

     protected void onProgressUpdate(Integer... progress) {
         setProgressPercent(progress[0]);
     }

     protected void onPostExecute(Long result) {
         showDialog("Downloaded " + result + " bytes");
     }
 }

您只需要执行 setProgressPercent 的方法来设置你的进度条，并把它隐藏在 onPostExecute 。

You just have to implement the setProgressPercent method to set the progress in your progress bar, and hide it on the onPostExecute.

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