Question

I am trying to create a Listview with multiple strings.

Right now I have a function that it will do

       while(i <= 10){
           //GETS DATA FROM WEBPAGE ETC
           a = DATAFROMWEBPAGE1;
           b = DATAFROMWEBPAGE2;
           c = DATAFROMWEBPAGE3
       }

10 times with 10 different sections from the webpage and I wanted to put this in a list view with 3 textviews showing a, b, c. But I’m having a very hard time doing so.

Answer 1

You can write a custom ListAdapter to do this:

MyAdapter adapter = new MyAdapter (this);
for (int i = 0; i < 10; i++) {
    adapter.addAdapterItem(new AdapterItem("first", "second", "third");
}
view.setListAdapter(adapter);

class AdapterItem:

public class AdapterItem {
  public String first;
  pubilc String second;
  public String third;

  public AdapterItem(String first, String second, String third) {
    this.first = first;
    this.second = second;
    this.third = third;
  }
}

class MyAdapter:

public class MyAdapter extends BaseAdapter {

private List<AdapterItem> items;

public void addAdapterItem(AdapterItem item) {
  items.add(item); 
}

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

public Object getItem(int position) {
  return items.get(position);
}

public View getView(int position, View convertView, ViewGroup parent) 
  View rowView = getLayoutInflater().inflate(R.layout.rowLayout);
  TextView firstTextView = (TextView) rowView.findViewById(R.id.firstView);
  firstTextView.setText(items.get(postion).first);
  // do the same with second and third
  return rowView;
}

Layout:

<LinearLayout android:Layout_width=".." android:layout_height="..">
  <TextView android:id="firstView" />
  <TextView android:id="secondView" />
  <TextView android:id="thirdView" />
</LinearLayout>

The code is not complete, just to give you the idea:

-You create a new ListAdapter that handles your items

• You can store your items in an extra class (AdapaterItem in this example) inside your adapter
• Your ListAdapter implementation has to provide common methods like getCount() and getItem()
• Within the getView(..) method you can return your custom view for each row. If you want to display 3 different text messages you have to define 3 Textviews in your layout and assign the strings in getView(..)