JSON Question

Connection Refused in reading JSON from PHP in localhost, Android Studio

I'm trying to connect to one php on my localhost server that works ok, but I can't read the content there.

Here is my code:

package com.example.klaussius.probandoconexionservidor;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import serverDataRead.ReadUsers;

public class Principal extends AppCompatActivity {

TextView tvText;
Button btGetInfo;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_principal);
// TextView for our text
tvText = (TextView)findViewById(R.id.tvText);
// Button to get text
btGetInfo = (Button)findViewById(R.id.btGetInfo);
btGetInfo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new leerDatos().execute();
}
});
}

private class leerDatos extends AsyncTask<String,Void,String> {
@Override
protected String doInBackground(String... strings) {
ReadUsers reader = new ReadUsers();
return reader.readUsers();
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
tvText.setText(s);
}
}
}


And my method readUsers is in the class readUsers:

package serverDataRead;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class ReadUsers {
public String texto;

public String readUsers(){
try {
String link = "http://127.0.0.1/api/usersQuery.php";
URL url = new URL(link);
HttpURLConnection con = HttpURLConnection)url.openConnection();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
texto = bufferedReader.readLine();
} catch (Exception e) {
texto = "Fail!";
e.printStackTrace();
} finally {
return texto;
}
}
}


The layout:

<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">

<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btGetInfo"
android:text="@string/getText" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tvText" />

</LinearLayout>


The error I get:
W/System.err: java.net.ConnectException: Connection refused

Thanks in advance for your help.

Answer

If you are using emulator rather than genymotion then use 10.0.2.2 instead of localhost so the url will be "http://10.0.2.2/api/hostsQuery.php" and if you use genymotion then replace localhost with 10.0.3.2,so the url will be "http://10.0.3.2/api/hostsQuery.php"

Let me know if this works for you