我从外部设备接收数据并将其作为文本文件保存在移动设备上。我的问题是 - 我需要从该文本文件中获取值userID。值保留在标记中。例如
<user>1234</user>
我正在尝试使用JSoup来实现这一目标,但我有一些复杂性。
这是我的代码:
public CommunicationThread(Socket clientSocket) {
this.clientSocket = clientSocket;
try {
InputStream in = this.clientSocket.getInputStream();
Date date = new Date();
File root = new File("/sdcard/mente/" + user.getID() );
if(!root.exists())
root.mkdirs();
String fileName = connectedDeviceSerialNumber + "_" + date + ".txt".replace(" ","_");
file = new File(root,fileName);
OutputStream out = new FileOutputStream(file);
int count;
StringBuilder sb = new StringBuilder();
while ((count = in.read(bytes)) > 0) {
out.write(bytes, 0, count);
for (byte b : bytes) {
sb.append(String.format("%02X ", b));
}
Log.e(TAG, "CommunicationThread: " + sb.toString() );
if (sb.toString().contains("3C 65 6E 64 5F 72 61 77 3E 74 72 75 65 3C 2F 65 6E 64 5F 72 61 77 3E") && syncProgressDialog != null) {
syncProgressDialog.dismiss();
}
}
Document doc = Jsoup.parse(sb.toString());
Elements el = doc.select("user");
String userId = el.attr("user");
Log.e(TAG, "STR: " + userId );
this.input = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream(), Charset.forName("ISO-8859-2")));
Log.e(TAG, "synchData1: ");
} catch (IOException e) {
Log.e(TAG, "error: " + e.getMessage());
}
}
提前感谢您的帮助:)
答案 0 :(得分:2)
我的猜测是你没有正确地收到文字
<强>代替强>
Document doc = Jsoup.parse(sb.toString());
Elements el = doc.select("user");
String userId = el.attr("user");
你应该
String userId = "";
Document doc = Jsoup.parse(sb.toString());
Elements el = doc.select("user"); // el is an ArrayList... not a single element...
if(!el.isEmpty()) {
Element singleElement = el.get(0);
if (singleElement.hasText()) {
userId = singleElement.text(); // Don't read attr... but text()
} else {
Log.e(TAG, "tag <user> has no text");
}
} else {
Log.e(TAG, "tag <user> not fould");
}
修改强>
我使用以下格式的文件进行了测试:
<user>1234</user>
<pass>1234</pass>
工作正常。你说不适合你,所以,sb.toString()
可能不包含正确的文本(你可以记录确认...... Log.e(TAG, "sb: " + sb.toString());
),或者它有不同的格式,我测试过.. ..所以,请分享你正在阅读的字符串示例。