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-----------------------------------
InputStream in = new FileInputStream( "/mnt/sdcard/infile" );
OutputStream os = new FileOutputStream( "/mnt/sdcard/outfile" );
byte[] buf = new byte[1024];
while ((len = in.read(buf, 0, buf.length)) != -1) {
  os.write(b, 0, len);
  os.flush();
}
os.close();
in.close();
-----------------------------------
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