Android : Best option for recognize clicked item in listview?

In My app I have a listview and a button for creating albums (By clicking on button app a new item adds to listview) and by clicking on each listview items you can go to that album and upload/take your photos for display.

for saving and retrieving photos after take/pick I use SharedPrefrence for saving and retrieving Image Path. as you see I Can't have a predefined SharedPrefrence, so I use this method which I made it myself: in listview OnItemClickListener I make this "str" String and by putting it in a intent It will be passed to my first album page:

list.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
            long arg3) {

        String str = new String("album" + arg2);
        Intent intent = new Intent(Albums.this, MainA.class);
        intent.putExtra("extra", str);
        startActivity(intent);
    }
});

And after this process I use this string in my new activity for my sharedprefrence like this:

String str = getIntent().getExtras().getString("extra");
SharedPreferences settings = getSharedPreferences(str, 0);

in this way everything does perfect but except when for example User Deletes the second album (second Item in Lisview) which cause third album to be the second and since I used the position int for specify the sharedprefrence it will totally destroy.

I don't know if you could understand my way =), But if you did what should I do to avoid this?

this way even is the best way for my purpose?

thanks.

---

EDIT:

deleting listview item code:

public void deletetask(String t){
    if (null == itemArrey) {
        itemArrey = new ArrayList<String>();
    }
    itemArrey.remove(t);

    //save the task list to preference
    b1s = getSharedPreferences("pref", Context.MODE_PRIVATE);
    try {
        b1s.edit().putString("array", ObjectSerializer.serialize(itemArrey)).commit();
    } catch (IOException e) {
        e.printStackTrace();
    }
}