Intent intent = new Intent(getApplicationContext(), ActivityToLaunch.class);
intent.putExtra(<oneOfThePutExtraFunctions>);
PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
You can add extra data into an Intent by using one of the various Intent.PutExtra() functions located: http://developer.android.com/reference/android/content/Intent.html
Then, when you are ready to launch your PendingIntent, use one of the Send() functions located: http://developer.android.com/reference/android/app/PendingIntent.html