protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
SearchView searchView = findViewById(R.id.searchView1);
        gridView = (GridView) findViewById(R.id.gridView); //GridView Declaration
        connectionClass = new ConnectionClass(); // Connection Class Initialization
        itemArrayList = new ArrayList<ClassListItems>(); // Arraylist Initialization

        // Calling Async Task
        SyncData orderData = new SyncData();
        orderData.execute("");
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {

                return true;
            }

            @Override
            public boolean onQueryTextChange(String newText) {

                return false;
            }
        });