我在项目中找到以下代码。它可以工作并且可以读取超过20MB的大文件。从代码的设置方式来看,它应该在5000个字节后失败。为什么行得通? ByteArrayBuffer的文档没有类似的指示。我已经验证了读取循环会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();
最佳答案
5000只是初始容量。达到极限后会自动调整大小
关于java - Android ByteArrayBuffer容纳的字节数多于容量,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/22407411/