InputStream转成String

 InputStream inputStream = new FileInputStream(file);

 InputStreamReader reader = new InputStreamReader(
 inputStream, "UTF-8");

 BufferedReader br = new BufferedReader(reader);
 String data = "";
StringBuffer sb = new StringBuffer();

 while ((data = br.readLine()) != null) {
 sb.append(data);
 }
 String xml = sb.toString();
 Log.e("----",xml);
 inputStream.close();