final EditText input = new EditText(this);
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("Title");
alertDialog.setMessage("Message");
alertDialog.setView(input, 10, 0, 10, 0); // 10 spacing, left and right
alertDialog.setButton("OK", new OnClickListener() {
@Override public void onClick(DialogInterface dialog, int which) {
// Clicked
}
});
alertDialog.show();