Dialog in list view Android

Question

I have a listview which contains elements, and a button delete, when I click on this button I want to display a dialog then confirm or not the deleting of the element, the problem is that I can't display the dialog on the listview, I have an issue with the context.

public void onClick(View v) {
    if(v.getId()==R.id.Supprimer){
        AlertDialog.Builder builder = new 
        AlertDialog.Builder(getContext());

        builder.setCancelable(true);
        builder.setTitle("Suppression d'un rendez-vous");
        builder.setMessage("Voulez vous supprimer ce rendez-vous");

        builder.setNegativeButton("Non", new 
        DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.cancel();
            }
        });

        builder.setPositiveButton("Oui", new 
        DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                //alertTextView.setVisibility(View.VISIBLE);
                GestBDD.suppRDV(rdv,getContext());
                adapter.remove(getPosition(rdv));
                cl.notifyDataSetChanged();
                Toast.makeText(getContext(),"Rendez vous 
                supprimé",Toast.LENGTH_LONG).show();
            }
        });
        builder.show();

        }
        }

the error is at builder.show() line and it says

     W/System.err:     at 
     com.example.hp.bendaoudtest.RDVAdapter.onClick(RDVAdapter.java:110)

Answer 1

AlertDialog only accepts activity context instead of application context. If your getContext() gets application context you are going to get an error. Your getContext() method should return activity context which can be instantiated from activity class you are using by sending this as constructor parameter. Don't send getApplicationContext() as constructor parameter. Example:

RVDAdapter rvdadapter = new RVDAdapter(this);