android: Create a Dialog with positive and negative button

public void dialog() {
    DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            switch (which) {
                case DialogInterface.BUTTON_POSITIVE:

                     //Do your own work 
                   // turn3GOn();  break;            

               case DialogInterface.BUTTON_NEGATIVE:

                    //Do your own work 
// close();          

           }
        }
    };  

   AlertDialog.Builder builder = new AlertDialog.Builder(this); 

   LinearLayout linearLayout = new LinearLayout(this);   

   linearLayout.setOrientation(LinearLayout.VERTICAL); 

   TextView textViewDialog = new TextView(this);   

   textViewDialog.setText("Notice!");   

   textViewDialog.setGravity(Gravity.CENTER); 

  //textViewDialog.setCompoundDrawablesWithIntrinsicBounds(R.drawable.evhome, 0, 0, 0);  

  textViewDialog.setCompoundDrawablePadding(20);  

  textViewDialog.setTextColor(Color.parseColor("#FFFFFF")); 

  textViewDialog.setPadding(20, 10, 10, 10);   

  textViewDialog.setBackgroundColor(Color.parseColor("#33B5E5"));  

  textViewDialog.setTextSize(22);   

  TextView textViewDialog2 = new TextView(this); 

  textViewDialog2.setTypeface(Typeface.SERIF);  

  textViewDialog2.setText("Please Turn On Your Data Connection ");  

  textViewDialog2.setTextColor(Color.parseColor("#000000"));  

  textViewDialog2.setPadding(20, 20, 20, 20);  

  textViewDialog2.setBackgroundColor(Color.parseColor("#F5F5F5")); 

  textViewDialog2.setTextSize(15);  

  linearLayout.addView(textViewDialog);  

  linearLayout.addView(textViewDialog2);  

  builder.setView(linearLayout);  

  builder.setPositiveButton(Html.fromHtml("<b>" + "Ok" + "<b>"), dialogClickListener);  

  bui lder.setNegativeButton(Html.fromHtml("<b>" + "Cancel" + "<b>"), dialogClickListener);    bui lder.show();}