Question

I have a variable called current which holds the last clicked listview item data. The id of this data is to be used to query the db again for movies taht are similar.

The problem that current = id=17985, title=the matrix, year=1999 when all i need is the actual id-number. I have tried to use substring to only use the correct places of the string. This works for the matrix since its id is exactly 5 digits long, but as soon as i try to click movie with higher/lower amount of digits in its id of course it trips up.

String id = current.substring(4,9).trim().toString(); does not work for all movies.

Heres some code:

// search method: this is necessary cause this is the method thats first used and where the variable current is set. This is also the only method using three lines for getting data – id, title and year.

 protected void search() {
        data = new ArrayList<Map<String, String>>();
        list = new ArrayList<String>();
        EditText searchstring = (EditText) findViewById(R.id.searchstring);
        String query = searchstring.getText().toString().replace(' ', '+');
        String text;

        text = searchquery(query);
        try {
            JSONObject res = new JSONObject(text);

            JSONArray jsonArray = res.getJSONArray("movies");

            for (int i = 0; i < jsonArray.length(); i++) {

                JSONObject jsonObject = jsonArray.getJSONObject(i);
                item = new HashMap<String, String>(2);
                item.put("id",jsonObject.getString("id"));
                item.put("title",jsonObject.getString("title"));
                item.put("year", jsonObject.getString("year"));
                data.add(item);

            }
        } catch (Exception e) {
            e.printStackTrace();
        }                   

        aa = new SimpleAdapter(SearchTab.this, data,
                R.layout.mylistview,
                new String[] {"title", "year"},
                new int[] {R.id.text1,
                R.id.text2});
        ListView lv = (ListView) findViewById(R.id.listView1);
        lv.setAdapter(aa);
        lv.setDividerHeight(5); 

        lv.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view, int pos, long id) {

                Map<String, String> s = data.get((int) id);
                current = s.toString();
            }});
    }

// similar method: this tries to build a list from the fetched data from “current”-string. As you can see i try to use 4,9 to only get right numbers, but this fails with others. Best would be to only to be ble to get the ID which I cant seem to do. The toast is just to see what is beeing fetched, much like a system out print.

 protected void similar() {
        data = new ArrayList<Map<String, String>>();
        list = new ArrayList<String>();
        String id = current.substring(4,9).trim().toString();
        Toast.makeText(getApplicationContext(), id, Toast.LENGTH_SHORT).show();
        String text;

        text = similarquery(id);
        try {
            JSONObject res = new JSONObject(text);

            JSONArray jsonArray = res.getJSONArray("movies");

            for (int i = 0; i < jsonArray.length(); i++) {

                JSONObject jsonObject = jsonArray.getJSONObject(i);
                item = new HashMap<String, String>(2);
                item.put("title",jsonObject.getString("title"));
                item.put("year", jsonObject.getString("year"));
                data.add(item);

            }
        } catch (Exception e) {
            e.printStackTrace();
        }                   

        aa = new SimpleAdapter(SearchTab.this, data,
                R.layout.mylistview2,
                new String[] {"title", "year"},
                new int[] {R.id.text1,
                R.id.text2});
        ListView lv = (ListView) findViewById(R.id.listView1);
        lv.setAdapter(aa);
        lv.setDividerHeight(5); 

    }

Answer 1

Use current.split(",")[0].split("=")[1]

edit – assuming of course that id is always the first in the comma separated list and will always be a name value pair delimited by ‘=’