public Bitmap GetBitmap(string url)
{
Java.IO.File file = fileCache.GetFile(url);
//先从文件缓存中查找是否有
//from SD cache
Bitmap b = DecodeFile(file);
if (b != null)
{
return(b);
}
/**
* 最后从指定的url中下载图片
*/
//from web
try {
Bitmap bitmap = null;
URL imageUrl = new URL(url);
HttpURLConnection conn = (HttpURLConnection)imageUrl.OpenConnection();
conn.Connect();
conn.ConnectTimeout = 30000;
conn.ReadTimeout = 30000;
conn.InstanceFollowRedirects = true;
var inStream = conn.InputStream;
var outputStream = new FileOutputStream(file);
CopyStream(inStream, outputStream);
outputStream.Close();
conn.Disconnect();
bitmap = DecodeFile(file);
return(bitmap);
} catch (Throwable ex) {
ex.PrintStackTrace();
if (ex is OutOfMemoryError)
{
memoryCache.Clear();
}
return(null);
}
}