public void confirmMessage(View v){

    new AlertDialog.Builder(this)
						.setTitle("Title")
            .setMessage("Do you really want to do whatever?")
            .setIcon(android.R.drawable.ic_dialog_alert)
            .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {

                public void onClick(DialogInterface dialog, int whichButton) {
                    Toast.makeText(MainActivity.this, "Yaay", Toast.LENGTH_SHORT).show();
                }})
            .setNegativeButton(android.R.string.no, null).show();
}