I am trying to get the value of TextView from gridView, when I click on an element of 
the list. The adapter consists of 2 textViews. This is the ListAdapter class.

    public class ListAdapter extends BaseAdapter {

    private Context context;
    private int layout;
    private ArrayList<Customer> CustomerList;

    public ListAdapter(Context CustomerList, int customer_activity, ArrayList<Customer> Customer) {
        this.context = CustomerList;
        this.layout = customer_activity;
        this.CustomerList = Customer;
    }

    @Override
    public int getCount() {
        return CustomerList.size();
    }

    @Override
    public Object getItem(int position) {
        return CustomerList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    private class ViewHolder{
        TextView textViewJob, textViewName;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        ViewHolder holder = new ViewHolder();

        if(row == null)
        {
            LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(layout,null);

            holder.textViewJob = (TextView)row.findViewById(R.id.tvJobAdap);
            holder.textViewName = (TextView)row.findViewById(R.id.tvNameAdap);
            row.setTag(holder);
        }
        else {
            holder = (ViewHolder)row.getTag();
        }

        Customer Customer = CustomerList.get(position);

        holder.textViewJob.setText(Customer.getJob());
        holder.textViewName.setText(Customer.getName());

        return row;
    }
}

When I click on an element of my list (for example at the third position), I would like 

to get the TextViewName (Customer.getName()) which corresponds to that id. I have tryed 
to explain it at gridViewCustomer.setOnItemClickListener in Toast.makeText

    GridView gridViewCustomer;
    ArrayList<Customer> customer;
    ListeAdapter adapter = null;

    public String selectedItemText;

    //Referenz of the SQLiteHelper class
    public static SQLiteHelper sqLiteHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.Customer_activity);


        sqLiteHelper = new SQLiteHelper(CustomerListe.this, "Customer.sqlite", null, 3);
        //Customer List
        gridViewPflanzen = (GridView) findViewById(R.id.gvCustomerList);
        customer = new ArrayList<>();
        adapter = new ListeAdapter(this, R.layout.customer_activity, customer);
        gridViewCustomer.setAdapter(adapter);

    gridViewCustomer.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,final int position, long id) {

    Toast.makeText(ListActivity.this, "You have clicked on the element with id =" + id, Toast.LENGTH_SHORT).show();

      Toast.makeText(ListActivity.this, "Please how could I get the TextView (TextViewName) corresponding to that id ?", Toast.LENGTH_SHORT).show();

            }
        });
     }

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Edité par K070913S080913 10 décembre 2018 à 19:44:53