I have a ListViewAdapter that displays a game's scoreboard in three columns.
As properties of my MainActivity, I have
ArrayList<HashMap<String,String>> scoreList;
ListViewAdapter scoreboardAdapter;
In OnCreate(), I have
scoreList = new ArrayList<>();
scoreboardAdapter = new ListViewAdapter(this, scoreList);
((ListView)findViewById(R.id.scoreBoard)).setAdapter(scoreboardAdapter);
I have a class to build the scorelist from a Map (player ids and scores) here:
public class ScoreBoard {
public ScoreBoard(HashMap<String,Integer> scores){
this.scores = scores;
}
private Map<String,Integer> scores;
public ArrayList<HashMap<String,String>> GetAdapterList()
{
scores = MapUtil.sortByValue(scores);
ArrayList<HashMap<String,String>> adapterList = new ArrayList<>();
Integer i = 1;
Iterator it = scores.entrySet().iterator();
while (it.hasNext()) {
HashMap<String, String> columnMap = new HashMap<>();
Map.Entry pair = (Map.Entry)it.next();
columnMap.put(Constants.FIRST_COLUMN, i.toString());
columnMap.put(Constants.SECOND_COLUMN, pair.getKey().toString());
columnMap.put(Constants.THIRD_COLUMN, pair.getValue().toString());
adapterList.add(columnMap);
it.remove();
i++;
}
return adapterList;
}
}
Custom ListViewAdapter class
public class ListViewAdapter extends BaseAdapter{
public ArrayList<HashMap<String, String>> list;
Activity activity;
TextView txtFirst;
TextView txtSecond;
TextView txtThird;
public ListViewAdapter(Activity activity,ArrayList<HashMap<String, String>> list){
super();
this.activity=activity;
this.list=list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater=activity.getLayoutInflater();
if(convertView == null){
convertView=inflater.inflate(R.layout.column_row, null);
txtFirst=(TextView) convertView.findViewById(R.id.rank);
txtSecond=(TextView) convertView.findViewById(R.id.name);
txtThird=(TextView) convertView.findViewById(R.id.score);
}
HashMap<String, String> map=list.get(position);
txtFirst.setText(map.get(Constants.FIRST_COLUMN));
txtSecond.setText(map.get(Constants.SECOND_COLUMN));
txtThird.setText(map.get(Constants.THIRD_COLUMN));
return convertView;
}
}
And finally, I have the Update method (which I'm calling from the ui thread)
void updatePeerScoresDisplay() {
Log.d(TAG, "updatePeerScoresDisplay entered");
scoreList.clear();
scoreList.addAll(new ScoreBoard(mParticipantScore).GetAdapterList());
scoreboardAdapter.notifyDataSetChanged();
}
Only the first call to updatePeerScoresDisplay is working. After that, no effect. I'm even debugging and seeing scorelist updated correctly before NotifyDataSetChanged is called. What can cause this?
