我一直试图从SO和其他网站上的大量例子中学习,但我无法弄清楚为什么我一起攻击的例子不起作用.我正在构建一个小概念验证应用程序来识别语音并将其作为POST请求发送到node.js服务器.语音识别我已经确认工作,服务器正在接收来自常规浏览器访问的连接,因此我认为问题出在应用程序本身.我错过了一些小而愚蠢的东西吗？没有错误被抛出,但服务器永远不会识别连接.提前感谢任何建议或帮助.

相关Java(主要活动和必要的AsyncTask)：

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (requestCode == 1001) {

if (resultCode == RESULT_OK) {

ArrayList textMatchList = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);

if (!textMatchList.isEmpty()) {

String topMatch = textMatchList.get(0);

PostTask pt = new PostTask();

pt.execute(topMatch);

}

}

}

}

private class PostTask extends AsyncTask {

@Override

protected String doInBackground(String... data) {

try {

URL url = new URL("http://:3000");

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

conn.setReadTimeout(10000);

conn.setConnectTimeout(15000);

conn.setRequestMethod("POST");

conn.setDoOutput(true);

ContentValues values = new ContentValues();

values.put("data", data[0]);

OutputStream os = conn.getOutputStream();

BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));

StringBuilder sb = new StringBuilder();

sb.append(URLEncoder.encode("data", "UTF-8"));

sb.append("=");

sb.append(URLEncoder.encode(data[0], "UTF-8"));

writer.write(sb.toString());

writer.flush();

writer.close();

os.close();

conn.connect();

return "Text sent: " + data[0];

} catch (IOException e) {

e.printStackTrace();

return "LOL NOPE";

}

}

}

服务器JS：

var http = require('http');

const PORT=3000;

function handleRequest(request, response){

response.end('It Works!! Path Hit: ' + request.url);

console.log("Request got.");

}

var server = http.createServer(handleRequest);

server.listen(PORT, '0.0.0.0');

console.log("Listening on 3000...");