PHP does not send echo back

Question

Using API 23. Can't provide LogCat ( i don't have an emulator, i can only test by generating apk). I've been trying these for all day and I am still stuck. Android App > send some Strings to a php located in my localhost ( using xampp)> get back those strings and display in TextView.

MainActivity

public class MainActivity extends AppCompatActivity {

Button b1;
TextView t1;
EditText e1;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);


    e1 = (EditText)findViewById(R.id.editText);
    t1 = (TextView)findViewById(R.id.textView);
     b1 = (Button) findViewById(R.id.button);
    b1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            try {
            GetText();
            } catch (Exception ex) {
                t1.setText("url exception");
            }
        }
    });
}

public void GetText() throws UnsupportedEncodingException {

    String nombre = e1.getText().toString();
    new SignIn().execute(nombre);
}

public class SignIn extends AsyncTask {

    @Override
    protected String doInBackground(String... params) {
        String link="http://localhost:8012/kb_test/ejemplo.php";

        String code = params[0];
        StringBuilder sb = new StringBuilder();
        try {
            String data  = URLEncoder.encode("name", "UTF-8") + "=" + URLEncoder.encode(code, "UTF-8");

            URL url = new URL(link);
            URLConnection conn = url.openConnection();

            conn.setDoOutput(true);
            OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());

            wr.write( data );
            wr.flush();

            BufferedReader reader = new BufferedReader(new InputStreamReader (conn.getInputStream()));


            String line = null;

            while((line = reader.readLine()) != null)
            {
                sb.append(line);
                break;
            }
            return sb.toString();

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            return new String("Exception: " + e.getMessage());
        }
        return sb.toString();
    }
    @Override
    protected void onPostExecute(String result){
        Toast.makeText(getApplicationContext(),result,Toast.LENGTH_LONG);
    }
}

.xml

  <Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New Button"
    android:id="@+id/button"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_below="@+id/editText" />

<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="textPersonName"
    android:text="Name"
    android:ems="10"
    android:id="@+id/editText"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="Large Text"
    android:id="@+id/textView"
    android:layout_below="@+id/button"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="141dp" />

.php

<?php 

   $name   = urldecode($_POST['name']);
  /* $user   = urldecode($_POST['user']);
   $email  = urldecode($_POST['email']);
   $pass   = urldecode($_POST['pass']);*/


  echo 'Name '. $name /*'Email: '.$email' User'. $user ' Pass  :'. $pass*/; 

?>

** I am aware that i have to enter my actuall IP in Localhost. ** Internet permission added. Thanks to anyone that takes the time to help.

Answer 1

You have an error in your PHP code, it should be:

<?php 
    $name = urldecode($_GET['name']);
    $user = urldecode($_GET['user']);
    $email = urldecode($_GET['email']);
    $pass = urldecode($_GET['pass']);
    echo 'Name ' . $name . 'Email: ' . $email . ' User' . $user . ' Pass  :' . $pass;

You are missing . between each of the string concatenations. If this still does not help, please prepend: error_reporting(E_ALL) and let us know what is the error when you are trying to reach the script on your webserver.

Answer 2

Nonsense that you have no LogCat. Of course there is one if you have connected your device to your pc.

You cannot call getText() in an onClick() handler. As all network code has to be done in an AsyncTask or thread.

Thats why you have a NetworkOnMainThreadException now.