Listview item color change

Question

Sorry for asking simmilar question again. Answer was to complex for me because i started with android 3 weeks ago and i don't know why i can't reply and past code in question.

I have a listview with 3 columns(timeschedule). First is time when bus leaves station, second is description of bus line and third is difference between the time when the bus leaves the station and the system time.

So I want to change the color of items (bus lines) which are passed. I know that listview has a method setBackgroundColor, but it works only for all items.

And this is my code:

        mylist = new ArrayList<HashMap<String, String>>();
       mylistglava = new ArrayList<HashMap<String, String>>();

/********** Display the headings ************/
map1 = new HashMap<String, String>();
map1.put("Polazak", "Polazak:");
map1.put("Opis", "Napomena:");
map1.put("Kreceza", "Krece za:");
mylistglava.add(map1);

try {
    adapterglava = new SimpleAdapter(this, mylistglava,
            R.layout.vrijemebus, new String[] { "Polazak", "Opis",
                    "Kreceza" }, new int[] { R.id.Polazak, R.id.Opis,
                    R.id.Kreceza });
    list_glava.setAdapter(adapterglava);
} catch (Exception e) {
    e.printStackTrace();

}

/********************************************************/

/********** Display the contents ************/

for (int i = 0; i < bus.vrijeme.length; i++) {
    map2 = new HashMap<String, String>();
    map2.put("Polazak", bus.vrijeme[i]);
    map2.put("Krece za", kreceza[i]);
    if (i < bus.opis.length)
        map2.put("Opis", bus.opis[i]);
    else
        map2.put("Opis", " ");
    mylist.add(map2);
}

try {
    adapter = new SimpleAdapter(this, mylist, R.layout.vrijemebus,
            new String[] { "Polazak", "Opis", "Krece za" }, new int[] {
                    R.id.Polazak, R.id.Opis, R.id.Kreceza });
  list.setAdapter(adapter);
} catch (Exception e) {
    e.printStackTrace();

}

}

So can anyone implement Adapter getview() and describe me how to set this on my previous code. Maybe i will get it then. Thanks again, Matija

override getView() method of custom Adapter and give conditions there for background color — Hemant Patel, May 14 '14 at 12:01
you can do that but for which textview. don't understand Opis Polazak .. — Raghunandan, May 14 '14 at 12:22
it's on croatian :) Opis=description, polazak=bus departure, kreceza=diffrence between bus departure time and system time... — user3613833, May 14 '14 at 12:35
@user3613833 ok check my answer it should work. So if polazak is passed then change the color — Raghunandan, May 14 '14 at 12:43
@Raghunandan ok I will try it later, i'm at college now. Thank you — user3613833, May 14 '14 at 12:56
@Raghunandan yes, i had some problem but now it's working fine. Example of problem: I set String value=tv3.getText().toString;/*tv3 is third column or third textview*/ if(value=="passed") { tv.setTextColor(Color.BLACK); tv2.setTextColor(Color.BLACK); tv3.setTextColor(Color.BLACK);} And result was that all text in listview was colored BLACK, not only where value=="passed"; And than i put else (set other color to all 3 tv) after if and that work just fine. I don't know why i need that else but whitout it result is wrong. Thank you for you help :) — user3613833, May 16 '14 at 01:18
1. you need the else part. 2. use .equlas to compare strings both mentioned in the code posted in my post. if it helps do accept the same — Raghunandan, May 16 '14 at 03:53

score 0 · Answer 1 · answered May 14 '14 at 12:03

0

You should use GridView instead of ListView. In this case you'll be able to customize any item you want.

answered May 14 '14 at 12:03

Ivan Rylach

249
1
8

why op should `GridView`? You can do it with Listview also – Raghunandan May 14 '14 at 12:23
Sure, it's possible to do it with `ListView`, but not effective. – Ivan Rylach May 14 '14 at 12:24
why is that so? I see no problem at all – Raghunandan May 14 '14 at 12:25
In case of `GridView` it's easier to manipulate items in a row/column. You can use 3 lightweight adapters instead of 1 heavy. The less code inside `getView()` the better, because this function is called a huge number of times. – Ivan Rylach May 14 '14 at 12:33
i don't think so. the listview works fine. http://stackoverflow.com/questions/11945563/how-listviews-recycling-mechanism-works – Raghunandan May 14 '14 at 12:38
In terms of application smooth work, the best solution will be a usage of a `ViewHolder` pattern both for `GridView` and `ListView` – Ivan Rylach May 14 '14 at 12:38
@Raghunandan yeap, they use `ViewHolder` I mentioned above – Ivan Rylach May 14 '14 at 12:41
also gridview you can specify the number of columns but not rows. – Raghunandan May 14 '14 at 12:42
Actually you can do it. Just add a fixed number of items and don't change it. The same is for `ListView`. Consider `GridView` is a usual matrix from math. – Ivan Rylach May 14 '14 at 12:49
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/52679/discussion-between-raghunandan-and-ivan-rylach) – Raghunandan May 14 '14 at 12:50

Raghunandan · Answer 2 · 2014-05-14T13:37:01.437

Override getView of Adapter

adapter = new SimpleAdapter(this, mylist, R.layout.vrijemebus,
        new String[] { "Polazak", "Opis", "Krece za" }, new int[] {
                R.id.Polazak, R.id.Opis, R.id.Kreceza })
       {
           @Override
           public View getView (int position, View convertView, ViewGroup parent)
           {
               View v = super.getView(position, convertView, parent);
               TextView tv = (TextView) v.findViewById(R.id.Polazak);
               // based on condition. set color to  the required textview
               String value = tv.getText().toString();
               if(value.equals("passed"))
               {
               tv.setTextColor(Color.RED);
               }else
               {
               tv.setTextColor(Color.BLACK);
               }

               return v;
           }
       };

Listview item color change

2 Answers2