private void copyFile(InputStream in, File file) {
	    try {
	        OutputStream out = new FileOutputStream(file);
	        byte[] buf = new byte[1024];
	        int len;
	        while((len=in.read(buf))>0){
	            out.write(buf,0,len);
	        }
	        out.close();
	        in.close();
	    } catch (Exception e) {
	        e.printStackTrace();
	    }
	}