Android connection to localhost

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I'm trying to connect my android application to a local host url thanks to wamp server but it doesn't work. My goal here, is to fetch json data and parse these data. For my test, i'm using a device not the emulator and i use permission in AndroidManifest.xml :

<uses-permission android:name="android.permission.INTERNET" />

My url looks like this :

String url = "http://10.0.2.2:8080/tests/PhpProject1/connectionBDD.php";

i tried :

http://localhost/
http://10.0.2.2:8080/
http://10.0.2.2/

But it never worked so far :

    java.net.ConnectException: failed to connect to localhost/127.0.0.1 (port 80): connect failed: ECONNREFUSED (Connection refused)

    failed to connect to /10.0.2.2 (port 8080): connect failed: ETIMEDOUT (Connection timed out)

    java.net.ConnectException: failed to connect to /10.0.2.2 (port 80): connect failed: ETIMEDOUT (Connection timed out)

Then i tried with a json url test found on the internet : http://headers.jsontest.com/

It worked really good and i got json data at this address. So i guess my code is good and the issue here is my localhost url, i don't know what should be its exact form.. I read many threads about it but i didn't find a solution.

Here my code :

Main activity :

public class MainActivity extends Activity {
    private String url = "http://10.0.2.2:8080/tests/PhpProject1/connectionBDD.php";

    private ListView lv = null;
    private Button bGetData;

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final JsonDownloaderTask task = new JsonDownloaderTask(this);
        lv = (ListView) findViewById(R.id.list);

        bGetData = (Button)findViewById(R.id.getdata);
        bGetData.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {               
                task.execute(url);                      
            }
        });
    }

    public void jsonTaskComplete(JSONArray data){
        //todo
    }   
}

AsyncTask :

public class JsonDownloaderTask extends AsyncTask<String, String, JSONArray> {

    MainActivity ma;

    public JsonDownloaderTask(MainActivity main){
        ma = main;
    }

    @Override
    protected JSONArray doInBackground(String... url) {
        JSONParser jParser = new JSONParser();
        // Getting JSON from URL
        JSONArray jsonArray = null;
        try {
            jsonArray = jParser.getJSONFromUrl(url[0]);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return jsonArray;        
    }

    protected void onPostExecute(JSONArray data){

        ma.jsonTaskComplete(data);
    }
}

JSONParser :

public class JSONParser {
    String data = "";
    JSONArray jsonArray = null;        
    InputStream is = null;

    public JSONParser(){}

    // Method to download json data from url
    public JSONArray getJSONFromUrl(String strUrl) throws IOException{
        try{
            URL url = new URL(strUrl);

            // Creating an http connection to communicate with url
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

            // Connecting to url
            urlConnection.connect();

            // Reading data from url
            is = urlConnection.getInputStream();

            BufferedReader br = new BufferedReader(new InputStreamReader(is));

            StringBuffer sb  = new StringBuffer();

            String line = "";
            while( ( line = br.readLine())  != null){
                sb.append(line);
            }
            is.close();
            data = sb.toString();

            //br.close();

            jsonArray = new JSONArray(data);

        }catch(Exception e){
            Log.d("Exception while downloading url", e.toString());
        }finally{
            is.close();
        }

        return jsonArray;
    }
}

First you have to bind the IP address of the machine where your server is running in the eclipse settings.

You can do this like this.

Right click on the PHP project in the eclipse then Run Configuration then In the Web Application where you will find the Argument tab. Now here give the port and LAN IP address of your machine on which your server is running.

Something like this --port=8888 --address=192.168.1.6 then update the URL to http://192.168.1.6:8080/tests/PhpProject1/connectionBDD.php

Here in my case this is my LAN IP address 192.168.1.6, there you will have to find it using the network command like ipconfig , ifconfig and use that IP address.

Accessing localhost of PC from USB connected Android mobile device, first connect your real device with the USB cable (make sure you can How to Easily access LocalHost in Actual Android Device -> Connect� Connecting to localhost from a Xamarin app Connectiong UWP to localhost for debugging. In debug mode, UWP apps are automatically able to connect to Connecting Android emulator to localhost. The android emulator (running on HyperV) behaves the same way as your android Connection android to

IP-address 10.0.2.2 is used to fetch data from the emulator. Localhost will always point to the emulator/android device running the application. To let your device fetch data from your pc, it should be in the same network (connected by WiFi to your router) and you should use the local IP-address of your pc (normally a 192.168.1.x-number).

How can I access my localhost from my real Android/IOS device , They can connect to the backend server or website through localhost and using Accessing to Laravel server from android phone at a port. Applications running in the Android emulator can connect to local HTTP web services via the 10.0.2.2 address, which is an alias to your host loopback interface (127.0.0.1 on your development machine).

If you try to connect to "localhost", it will resolve to the Android device, not to your own localhost (unless you are running within the emulator). What I recommend for development is to add an overflow menu in the action bar that has an entry named "Settings" that provides a Settings activity for specifying application settings, and to have a "Developer options" entry in "Settings" that lets you specify a custom server address to use. During development, you can use this option to enter a custom server address for your app. (You will need a real server address that is actually reachable over the Internet rather than using localhost for this).

How to access localhost via Android Emulator?, Some times we need to connect to a server running in our PC's localhost, via android emulator for several reasons. This is impossible because, when ever we � Follow below tutorial to connect Android with localhost using IP address. Successfully Running WAMP server on your computer indicates a green icon on system tray, click on that, with a menu pop up click on put online item. Wait for few second to process its task. below is the screenshot of wamp menu.

if you are using your phone instead of emulator and running services on localhost then in url instead of '10.0.2.2' use IP address of your PC.

Access Local Servers | Chrome DevTools, Im able to access my laptop web server using the Android emulator Im using 10022portnoworks wellBut when I connect my real Android phone localhost seemed to be working fine in my emulator at start and then i started getting connection refused exception i used 127.0.2.2 from the emulator browser and it worked and when i used this in my android app in emulator it again started showing the connection refused problem.

One simple way i know is keep mobile data on and share wifi . Connect your laptop or computer to this wifi . Now see ip of ur laptop or desktop. Call service from ur phone . Since your phone and your computer are in same network now.

How can I access my localhost from my Android device , Learn how to access a website running on localhost from your mobile phone. You'll need to connect both devices to the same network. So make sure your How to Reset Network Settings on Android devices. Network� Configure your Android emulator's proxy to use your IP address as host name and the port your backend is running on as Have your Android app send requests to the same URL (192.168.1.86:8080) (sending requests to localhost, and http://10.0.

How to Access a Website Running on Localhost from a Mobile , Connect To Localhost With Android Webview - Beginner Example This video aim for beginner Duration: 7:59 Posted: Jan 8, 2020 Configure proxy settings on your device On your Android device go to Settings > Wi-Fi. Long-press the name of the network that you are currently connected to. Note: Proxy settings apply per network. Tap Modify network. Tap Advanced options. The proxy settings display. Tap the Proxy menu and select

Connect To Localhost With Android Webview, In this video we're showing you how to run an Android app against a localhost API Duration: 1:45 Posted: Feb 9, 2016 In Android Emulator you can not use 'localhost', because 'localhost' is loopback and refers to Android emulator. Instead you have to address your web service by using the IP of IIS. Configure Firewall of your system, to allow http requests to come in.

How to Run Android Apps Against a localhost API (Tutorial), Specify the local machine address. The iOS simulator and Android emulator both provide access to secure web services running on your local�

Comments
  • Thanks for the answer, i managed this with NetBeans so now, urlConnection.connet(); works fine but i have another exception : java.net.SocketException: recvfrom failed: ECONNRESET (Connection reset by peer), maybe you know this issue
  • Well, For this new issue you can read here stackoverflow.com/questions/11207394/… and now you can accept the answer
  • @TGMCians Is the 8888 a typo ?
  • @StephaneEybert No, it's port number on which my server was running.
  • How can I do that on Android studio?
  • i have tried it with my lappy's ip address but still it is not connecting
  • same, not connecting
  • This only works on the Emulator, while the question specifically says it is using a device.
  • No, connecting using the 192.168.1.x IP address of the PC works with physical devices, if the server running on the PC is accessible within the local network. In my answer, I first explained why the code in the question didn't work.
  • This only works on emulators, while the question explicitly specified a physical device