我确实读过类似的问题，但对我没有任何作用。问题是方法 getProgress() 返回非常大的值（例如 16300 ）。我做错了什么？
看我的代码
public void download()
{
RandomAccessFile file = null;
InputStream inputStream = null;
HttpURLConnection connection = null;
try
{
connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("GET");
connection.setDoOutput(true);
connection.connect();
String connectLength = connection.getHeaderField("Content-Length");
if(connectLength == null || Integer.parseInt(connectLength) < 1 || connectLength.equals(""))
error();
size = Long.parseLong(connectLength);
file = new RandomAccessFile(filePath,"rw");
inputStream = new BufferedInputStream(url.openStream());
int read ;
while((read = inputStream.read(buffer)) > 0 && status == States.DOWNLOADING)
{
file.write(buffer,0,read);
downloadedS += read;
}
}
}
public float getProgress()
{
return ((float)downloadedS/size)*100;
}