Android simple alert dialog

I need to show a little text message to the users that
clicks a button on my Android app, on IOS I just had to create an AlertView that it's
simple to use but with Android i'm struggling because the solution seems x10 times
harder. I saw that I need to use a DialogFragment but I can't understand how to make it
work, can someone explain? Also, is my solution right or there is something easier to
show a simple text message to users?

class="post-text" itemprop="text">

class="normal">Answer

You would
simply need to do this in your
onClick:

AlertDialog
            alertDialog = new
            AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("Alert
            message to be shown");
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL,
            "OK",
 new DialogInterface.OnClickListener() {
 public void
            onClick(DialogInterface dialog, int which) {


            dialog.dismiss();
 }

            });
alertDialog.show();

I
don't know from where you saw that you need DialogFragment for simply showing an
alert.

Hope this helps.