Alertdialog In Android

public void ButtonClicked(View view) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("This is the title");
    builder.setMessage("This is the message");
    builder.setCancelable(false);
    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
        }
    });
    builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(EditTextDemo.this, "Ok Button Clicked", Toast.LENGTH_LONG).show();
        }
    });
    builder.show();
}

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