사용자 지정 ListView 스크롤 문제

Question

데이터베이스에서 데이터를로드하는 사용자 지정 listview를 만들었습니다. 그런 다음이 데이터를 배열로 가져옵니다.

모든 데이터가 목록보기에서 표시되어야합니다. 그래서 아무런 문제도 없습니다. 내가 겪고있는 문제는 스크롤링입니다. 내가 목록보기를 scoll했을 때 느리게 실행되는 것처럼 보입니다. :)

Answer 1

아마이 당신에게 도움이 될 것입니다

이에

static class ViewHolder { 
    public TextView txtTitle; 
    public TextView txtDescription; 
    public TextView txtLocations; 
    public TextView txtShowingDate; 
    public TextView txtAdded; 
    public TextView txtProvider; 
    public TextView txtTicketUrl; 
    public ImageView imgProviderImage; 
    } 

public class FilmItemAdapter extends ArrayAdapter<FilmRecord> { 
    public ArrayList<FilmRecord> films; 

    public FilmItemAdapter(Context context, int textViewResourceId, ArrayList<FilmRecord> films) { 
     super(context, textViewResourceId, films); 
     this.films = films; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     ViewHolder viewHolder = new ViewHolder(); 
     if (convertView == null) { 
      /* There is no view at this position, we create a new one. 
       In this case by inflating an xml layout */ 
      LayoutInflater inflater = LayoutInflater.from(getContext()); 
      convertView = inflater.inflate(R.layout.listitem, null); 

      // Creates a ViewHolder and store references to the two children views 
      // we want to bind data to. 
      //Find find by ID once, and store details in holder. 
      viewHolder.txtTitle = (TextView)convertView.findViewById(R.id.filmtitle); 
      viewHolder.txtShowingDate = (TextView) convertView.findViewById(R.id.filmshowingtime); 
      viewHolder.txtAdded = (TextView) convertView.findViewById(R.id.filmadded); 
      viewHolder.txtLocations = (TextView) convertView.findViewById(R.id.filmlocations); 
      viewHolder.txtDescription = (TextView) convertView.findViewById(R.id.filmdescription); 
      viewHolder.txtProvider = (TextView) convertView.findViewById(R.id.filmprovider); 
      viewHolder.txtTicketUrl = (TextView) convertView.findViewById(R.id.filmticketurl); 
      viewHolder.imgProviderImage = (ImageView) convertView.findViewById(R.id.providerImage); 

      convertView.setTag(viewHolder); 
     } else { 
      /* We recycle a View that already exists */ 
      viewHolder = (ViewHolder) convertView.getTag(); 
     } 

     FilmRecord film = films.get(position); 

     //Get film details from ARRAY and not the database - getting records from a db is time consuming. 
     viewHolder.txtTitle.setText(films.get(position).filmTitle); 
     viewHolder.txtDescription.setText(films.get(position).filmDescription); 
     viewHolder.txtLocations.setText(films.get(position).filmLocations); 
     viewHolder.txtShowingDate.setText("Showing time: " + films.get(position).filmShowingDate); 
     viewHolder.txtAdded.setText("Added on: " + films.get(position).filmAdded); 
     viewHolder.txtProvider.setText(films.get(position).filmProvider); 
     viewHolder.txtTicketUrl.setText(films.get(position).filmTicketUrl); 

     return convertView; 

    } 

} 

도움이 좋을 것 : example from the API demos

다음

내 코드의 추출물