Populating a Listview Using an Arraylist

Populating a ListView using an ArrayList?

You need to do it through an ArrayAdapter which will adapt your ArrayList (or any other collection) to your items in your layout (ListView, Spinner etc.).

This is what the Android developer guide says:

A ListAdapter that manages a ListView backed by an array of arbitrary objects. By default this class expects that the provided resource id references a single TextView. If you want to use a more complex layout, use the constructors that also takes a field id. That field id should reference a TextView in the larger layout resource.

However the TextView is referenced, it will be filled with the toString() of each object in the array. You can add lists or arrays of custom objects. Override the toString() method of your objects to determine what text will be displayed for the item in the list.

To use something other than TextViews for the array display, for instance ImageViews, or to have some of data besides toString() results fill the views, override getView(int, View, ViewGroup) to return the type of view you want.

So your code should look like:

public class YourActivity extends Activity {

    private ListView lv;

    public void onCreate(Bundle saveInstanceState) {
         setContentView(R.layout.your_layout);

         lv = (ListView) findViewById(R.id.your_list_view_id);

         // Instanciating an array list (you don't need to do this, 
         // you already have yours).
         List<String> your_array_list = new ArrayList<String>();
         your_array_list.add("foo");
         your_array_list.add("bar");

         // This is the array adapter, it takes the context of the activity as a 
         // first parameter, the type of list view as a second parameter and your 
         // array as a third parameter.
         ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
                 this, 
                 android.R.layout.simple_list_item_1,
                 your_array_list );

         lv.setAdapter(arrayAdapter); 
    }
}

How to populate listview in android from ArrayList?

For suppose listitems is the arraylist then you need to append your arraylist to listview as

//Declaration part
ArrayAdapter<String> adapter;
ArrayList<String> listItems=new ArrayList<String>();
lv  =(ListView)findViewById(R.id.listView1);

//arraylist Append
adapter=new ArrayAdapter<String>(From.this,
            android.R.layout.simple_list_item_1,
            listItems);
lv.setAdapter(adapter);

Populate listview from arraylist of objects

In your activity

AdapterPerson adbPerson;
ArrayList<Person> myListItems  = new ArrayList<Person>();

//then populate myListItems  

adbPerson= new AdapterPerson (youractivity.this, 0, myListItems);
listview.setAdapter(adbPerson);

Adapter

public class AdapterPerson extends ArrayAdapter<Person> {
    private Activity activity;
    private ArrayList<Person> lPerson;
    private static LayoutInflater inflater = null;

    public AdapterPerson (Activity activity, int textViewResourceId,ArrayList<Person> _lPerson) {
        super(activity, textViewResourceId, _lProducts);
        try {
            this.activity = activity;
            this.lPerson = _lPerson;

            inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        } catch (Exception e) {

        }
    }

    public int getCount() {
        return lPerson.size();
    }

    public Product getItem(Product position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public static class ViewHolder {
        public TextView display_name;
        public TextView display_number;             

    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View vi = convertView;
        final ViewHolder holder;
        try {
            if (convertView == null) {
                vi = inflater.inflate(R.layout.yourlayout, null);
                holder = new ViewHolder();

                holder.display_name = (TextView) vi.findViewById(R.id.display_name);
                holder.display_number = (TextView) vi.findViewById(R.id.display_number);


                vi.setTag(holder);
            } else {
                holder = (ViewHolder) vi.getTag();
            }



            holder.display_name.setText(lProducts.get(position).name);
            holder.display_number.setText(lProducts.get(position).number);


        } catch (Exception e) {


        }
        return vi;
    }
}

Populating a List View with two ArrayLists

//Replace your adapter code with this, I have check the size of Arraylist  
//inside getCount() and inside getview() method verify value
//of position not greater than size of Arraylist.

public class customDecisionAdapter extends BaseAdapter {
                Context context;
                private ArrayList<String> list1;
                private ArrayList<String> list2;

                public customDecisionAdapter(Context context, ArrayList<String>list1, ArrayList<String>list2) {
                    this.context= context;
                    this.list1= list1;
                    this.list2= list2;

                }

                @Override
                public View getView(int position, View view, ViewGroup viewGroup) {
                    View convertView =  view;
                    if(convertView==null){
                        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                        convertView = inflater.inflate(R.layout.customedecisio,viewGroup,false);

                    }
                    TextView t1 = (TextView) convertView.findViewById(R.id.textDisease);
                    TextView t2 = (TextView) convertView.findViewById(R.id.textTotal);

                    // Verify value of position not greater than size of ArrayList.
                    if(position < list1.size())
                            t1.setText(list1.get(position));

                    if(position< list2.size())
                         t2.setText(list2.get(position));

                    return convertView;
                }

                @Override
                public int getCount()
                {
                    if(list1.size() < list2.size())
                      return list2.size();
                    else
                       return list1.size();
                }

                @Override
                public Object getItem(int position) {
                    return position;
                }

                @Override
                public long getItemId(int position) {
                    return position;
                }

            }

Populating a ListView with an ArrayList - ListView doesn't populate

Your adapter doesn't know you've added new data here:

 favouriteShopsList.add(new Shop(jsonObject.getInt("id"),jsonObject.getString("azienda"), false));

try calling notifydatasetchanged() after you've added new data:

listAdapter.notifyDataSetChanged()

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