Alertdialog with background

Question

I created this alertDialog but I wonder if instead of having an icon when it appears, if it is possible to all have another color or even use an image like yours (Background). E Assign to the buttons a background.

public void icon (View View){
        AlertDialog.Builder dialog = new AlertDialog.Builder (this);
        dialog.setMessage("Exemplo com icon");
        dialog.setPositiveButton("NEXT", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                setContentView(R.layout.next);
            }
        });
        dialog.setTitle("Icone");
        dialog.setIcon(R.drawable.buttonum);
        dialog.show();
    }

Answer 1

You can create a layout.xml and add to Alertdialog

final AlertDialog dialog = new AlertDialog.Builder(suaActivity.this)
                    .setView(R.layout.seulayout)
                    .create();