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View ListViewView subtypes and headers

I have ListViewand can’t display the sub-items in the list ... It only displays one or the other, but not the one or the other. If I delete the number below, it will display the line (headers):

I want to display both elements and subelements.

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    this.loadData();

    String []titles_str = titles.toArray(new String[titles.toArray().length]);
    this.setListAdapter(new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_2, android.R.id.text1, titles_str));

    Number []subtitles_str = lengths.toArray(new Number[lengths.toArray().length]);
    this.setListAdapter(new ArrayAdapter<Number>(this,
            android.R.layout.simple_list_item_2, android.R.id.text2, subtitles_str));
}
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1 answer

you use "this.setListAdapter" two times, only the second "this.setListAdapter" will reflect.

For your requirement use

1)custom arrayadapter<customObject> 
      or 
2)simpleadapter.

1) Using a custom array, please check http://devtut.wordpress.com/2011/06/09/custom-arrayadapter-for-a-listview-android/

2) Using SimpleAdapter:

List<Map<String, String>> data = new ArrayList<Map<String, String>>();
for (int i=0; i<titles_str.length; i++) {
    Map<String, String> datum = new HashMap<String, String>(2);
    datum.put("title", titles_str[i]);
    datum.put("subtitle", String.valueof(subtitles_str[i]));
    data.add(datum);
}
SimpleAdapter adapter = new SimpleAdapter(this, data,
                                      android.R.layout.simple_list_item_2,
                                      new String[] {"title", "subtitle"},
                                      new int[] {android.R.id.text1,
                                                 android.R.id.text2});
this.setListAdapter(adapter);
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