Error in Alert dialog on this

Question

This is my code,

b3.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {

        if (v == b3) {
            AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setMessage("Delete")
                    .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            mydb.deleteContact(id_To_Update);
                            Toast.makeText(getApplicationContext(), "Deleted Successfully", Toast.LENGTH_SHORT).show();
                            Intent intent = new Intent(getApplicationContext(),MainActivity.class);
                            startActivity(intent);
                        }
                    })
                    .setNegativeButton("No", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            // User cancelled the dialog
                        }
                    });
            AlertDialog d = builder.create();
            d.setTitle("Are you sure");
            d.show();
        }
    }

});

if (!rs.isClosed()) {
    rs.close();
}
name.setText(nam);
email.setText(emai);

When I use this code on a delete button an error appear on first "this". How to solve it? How can I use delete confirmation message?

Please help me. Thanks in advance!

Answer 1

Use context instead of simply "this" reference. Here you can use Activity context, not any other context. For more information visit these links Context , AlertDialog.Builder

For activity:

 AlertDialog.Builder builder = new AlertDialog.Builder(ActivityName.this);

For fragment:

 AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

Thanks

Answer 2

You need to replace

AlertDialog.Builder builder = new AlertDialog.Builder(this);

with

AlertDialog.Builder builder = new AlertDialog.Builder(YourActivityName.this);