我正在使用asynctask来下载文件。它正常工作,直到我关闭我的Android的wifi连接(没有其他互联网连接),仍然没有更改下载对话框。当我通过日志检查时,我发现输入流的函数read()是不停止的。那么如何检查这种情况呢?这是我的代码:
URL url = new URL(this.url);
URLConnection connection = url.openConnection();
connection.setReadTimeout(1000);
connection.connect();
// this will be useful so that you can show a typical 0-100% progress bar
int fileLength = connection.getContentLength();
fileName = "temp.zip";
// download the file
InputStream input = new BufferedInputStream(connection.getInputStream());
OutputStream output = new FileOutputStream(path+fileName);
byte buffer[] = new byte[1024000];
long total = 0;
int count;
Log.v("test download:","download in background");
while (((count = input.read(buffer)) != -1)) {
Log.v("test download:","read:"+count);
total += count;
publishProgress((int) (total * 100 / fileLength - 1));
output.write(buffer, 0, count);
}
答案 0 :(得分:7)
由于您已经通过调用setReadTimeout()
设置了超时,因此您应该在连接断开后立即获得SocketTimeoutException
。
您的代码是否可能会以静默方式捕获此异常?
答案 1 :(得分:0)
您的文件下载缓冲区大小太多byte buffer[] = new byte[1024];
就足够了
当我用asynctask尝试这个Download a file with Android, and showing the progress in a ProgressDialog(顶部答案)时,工作正常,没有得到那个问题