//CameraTestActivity.class
if (!scanText.getText().toString().matches("")){

//set the scan text from bar code label

scanText.setText(sym.getData());

 //if Text scan the Content Automatic go to another Activity and pass the scan text from Main Activity

Intent i = new Intent(CameraTestActivity.this, MainActivity2.class);
                            i.putExtra("code_id", content);
                            startActivity(i);
                            finish();

}

//MainActivity2.class

        //trying to put the TextValue of scanText into tvView
        tvView = (TextView)findViewById(R.id.textView9);
        tvView.setText(getIntent().getExtras().getString("code_id"));

String ServerURL = ("https://asec-domain.000webhostapp.com/select.php?code_id="  + tvView);


//getAll.php
<?php

if (isset($_GET['code_id']))
{
  $id  = $_GET['code_id'];
}

// Create connection

$conn = new mysqli($HOST='localhost', $USER='id4400742_asec_domain', $PASS='asec@l0cal', $DB='id4400742_tbl_data');

if ($conn->connect_error) {

 die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT * FROM tbl_ComputerDetails WHERE CODE_ID= id ";

$result = $conn->query($sql);

if ($result->num_rows >0) {

 while($row[] = $result->fetch_assoc()) {

 $tem = $row;

 $json = json_encode($tem);

 }

 echo $json;

 }

 else
 {

 echo "No Results Found.";
 }
    $conn->close();
?>