Ejemplo n.º 1
0
  SectionAndItem<T> getSectionAndItem(int position) {
    if (sectionKeys.size() == 0) {
      return null;
    }
    String sectionKey = null;
    T graphObject = null;

    if (!displaySections) {
      sectionKey = sectionKeys.get(0);
      List<T> section = graphObjectsBySection.get(sectionKey);
      if (position >= 0 && position < section.size()) {
        graphObject = graphObjectsBySection.get(sectionKey).get(position);
      } else {
        // We are off the end; we must be adding an activity circle to indicate more data is coming.
        assert dataNeededListener != null && cursor.areMoreObjectsAvailable();
        // We return null for both to indicate this.
        return new SectionAndItem<T>(null, null);
      }
    } else {
      // Count through the sections; the "0" position in each section is the header. We decrement
      // position each time we skip forward a certain number of elements, including the header.
      for (String key : sectionKeys) {
        // Decrement if we skip over the header
        if (position-- == 0) {
          sectionKey = key;
          break;
        }

        List<T> section = graphObjectsBySection.get(key);
        if (position < section.size()) {
          // The position is somewhere in this section. Get the corresponding graph object.
          sectionKey = key;
          graphObject = section.get(position);
          break;
        }
        // Decrement by as many items as we skipped over
        position -= section.size();
      }
    }
    if (sectionKey != null) {
      // Note: graphObject will be null if this represents a section header.
      return new SectionAndItem<T>(sectionKey, graphObject);
    } else {
      throw new IndexOutOfBoundsException("position");
    }
  }
Ejemplo n.º 2
0
 @Override
 public int getPositionForSection(int section) {
   if (displaySections) {
     section = Math.max(0, Math.min(section, sectionKeys.size() - 1));
     if (section < sectionKeys.size()) {
       return getPosition(sectionKeys.get(section), null);
     }
   }
   return 0;
 }