我在将输出流写入InputStream后尝试阅读sdcard。我已从HttpURLConnection下载了文件。文件成功写入sdcard。但我试图从inputstream读取same file，但内容未正确阅读。在emulator上显示了一些内容，但未显示on actual device内容。你能帮忙解决一下这个问题吗？我发布了downloading，writing和reading code。
fileUrl = new URL(filename);
HttpURLConnection connection = (HttpURLConnection)fileUrl.openConnection();
InputStream is = connection.getInputStream();
/**
* Create file with input stream
*/
File downloadFile = new File("/sdcard/", "myFile3.pdf");
downloadFile.createNewFile();
final FileOutputStream outputStream = new FileOutputStream(downloadFile);
int availbleLength = is.available();
byte[] bytes = new byte[availbleLength];
int len1 = 0;
while ((len1 = is.read(bytes)) > 0) {
outputStream.write(bytes, 0, len1);
}
outputStream.flush();
outputStream.close();
File myFile = new File("/sdcard/myFile3.pdf");
InputStream inputStream = new FileInputStream(myFile);
byte[] buffer = new byte[inputStream.available()];
inputStream.read(buffer);
System.out.println("Byte Lenght: " + buffer.length);