Android中BaseAdapter用法示例

public class RecentAdapter extends BaseAdapter {
  private class RecentViewHolder {
    TextView appName;
    ImageView appIcon;
    TextView appSize;
  }
  private List mAppList;
  private LayoutInflater mInflater;
  private PackageManager pm;
  public RecentAdapter(Context c, List appList,
      PackageManager pm) {
    mAppList = appList;
    this.pm = pm;
    mInflater = (LayoutInflater) c
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  }
  public void clear(){
    if(mAppList!=null){
      mAppList.clear();
    }
  }
  public int getCount() {
    return mAppList.size();
  }
  @Override
  public Object getItem(int position) {
    return mAppList.get(position);
  }
  @Override
  public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
  }
  public View getView(int position, View convertView, ViewGroup parent) {
    RecentViewHolder holder;
    if (cOnvertView== null) {
      cOnvertView= mInflater.inflate(R.layout.app_info_item, null);
      holder = new RecentViewHolder();
      holder.appName = (TextView) convertView.findViewById(R.id.app_name);
      holder.appIcon = (ImageView) convertView
          .findViewById(R.id.app_icon);
      holder.appSize = (TextView) convertView.findViewById(R.id.app_size);
      convertView.setTag(holder);
    } else {
      holder = (RecentViewHolder) convertView.getTag();
    }
    ResolveInfo appInfo = mAppList.get(position);
    if (appInfo != null) {
      String labelName = appInfo.loadLabel(pm).toString();
      if (labelName != null) {
        holder.appName.setText(labelName);
      }
      Drawable icon = appInfo.loadIcon(pm);
      if (icon != null) {
        holder.appIcon.setImageDrawable(icon);
      }
    }
    return convertView;
  }
  public void remove(int position){
    mAppList.remove(position);
    this.notifyDataSetChanged();
  }
}

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