我在项目中找到了以下代码。它工作,可以读取超过20MB的大文件。根据代码的设置方式,它应该在5000字节后失败。它为什么有效? ByteArrayBuffer的文档没有表明这一点。我已经验证了读循环迭代每个文件的所有字节。
http://developer.android.com/reference/org/apache/http/util/ByteArrayBuffer.html
URLConnection ucon = url.openConnection();
ucon.setReadTimeout(10000); // enables throw SocketTimeoutException
InputStream is = ucon.getInputStream();
long expectedFileSize = ucon.getContentLength();
Log.d("Downloader", "expected file size: " + expectedFileSize);
BufferedInputStream bis = new BufferedInputStream(is);
// Read bytes to the Buffer until there is nothing more to read(-1).
// This code can read 20MB and bigger mp3-files, ... why?!?
ByteArrayBuffer baf = new ByteArrayBuffer(5000);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
FileOutputStream fos = new FileOutputStream(file);
fos.write(baf.toByteArray());
fos.flush();
fos.close();
答案 0 :(得分:1)
5000只是一个初始容量。一旦达到极限,它就会自动调整大小