Question

我正在开发一个Android应用程序，它将通过Wifi与Arduino Uno进行通信。当我访问地址192.168.11.110时，arduino已被编程为打开数字端口号12。当我打开我的浏览器并访问地址时，红色LED（连接到端口12）打开，当我再次访问它关闭时，工作完美。问题出在Android应用程序中，我发出了HTTP请求，LED亮起，看起来连接已经过了＃＆＃34;，我无法关闭LED，我可以＆＃39;通过浏览器访问，除非我重新启动Arduino或结束Android活动。

我在Android应用中用来发出HTTP请求的代码是：

public class ArduinoRequest extends AsyncTask<String, String, String> {

@Override
protected String doInBackground(String... uri) {
    HttpClient httpclient = new DefaultHttpClient();
    HttpResponse response;
    String responseString = null;
    try {
        response = httpclient.execute(new HttpGet(uri[0]));
        StatusLine statusLine = response.getStatusLine();
        if(statusLine.getStatusCode() == HttpStatus.SC_OK){
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            response.getEntity().writeTo(out);
            responseString = out.toString();
            out.close();
        } else{
            //Closes the connection.
            response.getEntity().getContent().close();
            throw new IOException(statusLine.getReasonPhrase());
        }
    } catch (ClientProtocolException e) {
        //TODO Handle problems..
    } catch (IOException e) {
        //TODO Handle problems..
    }
    return responseString;
}

@Override
protected void onPostExecute(String result) {
    super.onPostExecute(result);
    }
}

然后在我的

MenuActivity.java

我称之为

ArduinoRequest arduinoRequest = new ArduinoRequest();
                  arduinoRequest.execute("http://192.168.11.110");

有什么想法吗？：）

编辑：

我刚刚解决了。请改用此代码：

   // Instantiate the RequestQueue.
              RequestQueue queue = Volley.newRequestQueue(MenuActivity.this);
              String url ="http://192.168.11.110/";

            // Request a string response from the provided URL.
              StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
                      new Response.Listener<String>() {
                          @Override
                          public void onResponse(String response) {
                              // Display the first 500 characters of the response string.
                             // mTextView.setText("Response is: "+ response.substring(0,500));
                          }
                      }, new Response.ErrorListener() {
                  @Override
                  public void onErrorResponse(VolleyError volleyError) {

                  }

              });

异步HTTP请求和Arduino

0 个答案: