Connection Refused for Android Device Web Service SYMFONY 3

Question

Connect an Android Device To a Web Service on Local Host

Following my previous thread , im now able to connect my Android Device to my local host using wamp

But still i cannot connect to my symfony server and get my API datas

I sarted symfony's internal server : "Server running on http://127.0.0.1:8000 "

I used Internet permission on my AndroidManifest.xml

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />

My MainActivity.java code

package com.example.cbmedandroid;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity implements OnClickListener {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.my_button).setOnClickListener(this);
    }

    @Override
    public void onClick(View arg0) {
        Button b = (Button)findViewById(R.id.my_button);
        b.setClickable(false);
        new LongRunningGetIO().execute();
    }

    private class LongRunningGetIO extends AsyncTask <Void, Void, String> {
        protected String getASCIIContentFromEntity(HttpEntity entity) throws    IllegalStateException, IOException {
            InputStream in = entity.getContent();
            StringBuffer out = new StringBuffer();
            int n = 1;
            while (n>0) {
                byte[] b = new byte[4096];
                n =  in.read(b);
                if (n>0) out.append(new String(b, 0, n));
            }
            return out.toString();
        }

        @Override
        protected String doInBackground(Void... params) {
            HttpClient httpClient = new DefaultHttpClient();
            HttpContext localContext = new BasicHttpContext();
            HttpGet httpGet = new HttpGet("http://192.168.43.13:8000/api/horaire.json");
            String text = null;
            try {
                HttpResponse response = httpClient.execute(httpGet, localContext);
                HttpEntity entity = response.getEntity();
                text = getASCIIContentFromEntity(entity);
            } catch (Exception e) {
                return e.getLocalizedMessage();
            }
            return text;
        }

        protected void onPostExecute(String results) {
            if (results!=null) {
                EditText et = (EditText)findViewById(R.id.my_edit);
                et.setText(results);
            }
            Button b = (Button)findViewById(R.id.my_button);
            b.setClickable(true);
        }
    }
}

When i launch the application and click to the button . It load during 40 sec and i get this "Connection to http://192.168.43.13:8000 refused"

192.168.43.13 is my pc adress

What should i do to fix this . thanks.

Answer 1

FINALLY! i have found the solution to my problem

when running the built-in php server . We need to specify this command

php bin/console server:run 0.0.0.0:8000

(8000 is my port , you can put yours)

so that Any device or host (ip) could access

if you put 127.0.0.1 only your localhost will be allowed

That's why i couldn't get the Api even i was connected to my localhost via wifi hotspot

It's ok now

Answer 2

Are you able to install this cURL App for Android ?

Then use on your Android (is this a real phone or an emulator) open a cURL window and then enter:

cURL http://192.168.43.13:8000/

I tried this same kind of setup with a real Android phone and the above indicated cURL app and put in my Symfony web URL (on another PC), and the Android shows the correct html response back that I'm expecting.

At least this will help you verify functionality first.

Edit below this line:

Here is the code you might use since HttpClient was deprecated:

URL url = new URL("http://192.168.43.13:8000/api/horaire.json");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//conn.setRequestMethod("GET");

// read the response
System.out.println("Response Code: " + conn.getResponseCode());
InputStream in = new BufferedInputStream(conn.getInputStream());
String response = org.apache.commons.io.IOUtils.toString(in, "UTF-8");
System.out.println(response);

Not sure if you need to use the "setRequestMethod". But try out this change and see if that works for you.