How can I add a third button to an Android Alert Dialog?

When you are creating the dialog, add something like this to the builder:

builder = new AlertDialog.Builder(context);builder.setTitle("Test");builder.setIcon(R.drawable.icon);builder.setMessage("test");builder.setPositiveButton("Call Now",        new DialogInterface.OnClickListener()        {            public void onClick(DialogInterface dialog, int id)            {                dialog.cancel();            }        });builder.setNeutralButton("Setup",        new DialogInterface.OnClickListener()        {            public void onClick(DialogInterface dialog, int id)            {                context.startActivity(new Intent(context, Setup.class));                //dialog.cancel();            }        });builder.setNegativeButton("Exit",        new DialogInterface.OnClickListener()        {            public void onClick(DialogInterface dialog, int id)            {                dialog.cancel();            }        });builder.create().show();

This code snippet should help explain the three different buttons you can use:

    alertDialog = new AlertDialog.Builder(this).create();    alertDialog.setTitle("Dialog Button");    alertDialog.setMessage("This is a three-button dialog!");    alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "Button 1 Text", new DialogInterface.OnClickListener() {      public void onClick(DialogInterface dialog, int id) {        //...    } });     alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "Button 2 Text", new DialogInterface.OnClickListener() {      public void onClick(DialogInterface dialog, int id) {        //...    }});     alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "Button 3 Text", new DialogInterface.OnClickListener() {      public void onClick(DialogInterface dialog, int id) {        //...    }});

Add any number of buttons without xml:

    AlertDialog.Builder builder = new AlertDialog.Builder(context);    builder.setTitle("Title");    builder.setItems(new CharSequence[]            {"button 1", "button 2", "button 3", "button 4"},            new DialogInterface.OnClickListener() {                public void onClick(DialogInterface dialog, int which) {                    // The 'which' argument contains the index position                    // of the selected item                    switch (which) {                        case 0:                            Toast.makeText(context, "clicked 1", 0).show();                            break;                        case 1:                            Toast.makeText(context, "clicked 2", 0).show();                            break;                        case 2:                            Toast.makeText(context, "clicked 3", 0).show();                            break;                        case 3:                            Toast.makeText(context, "clicked 4", 0).show();                            break;                    }                }            });    builder.create().show();