Java ThumbnailItem類代碼示例

import com.google.android.apps.picview.ui.ThumbnailItem; //導入依賴的package包/類
/**
 * Instantiates a new MultiColumnImageAdapter.
 * 
 * @param dataItems
 *          the list of data items to display
 * @param inflater
 *          the inflater to be used to inflate the thumbnail slots
 * @param listener
 *          a listener that is notified when an album was clicked on
 * @param cachedImageFetcher
 *          used to fetch the thumbnail images
 * @param displayMetrics
 *          used to determine who many thumbnails can be display on a single
 *          row
 */
public MultiColumnImageAdapter(List<ThumbnailItem<T>> dataItems,
    LayoutInflater inflater, ThumbnailClickListener<T> listener,
    CachedImageFetcher cachedImageFetcher, DisplayMetrics displayMetrics) {
  this.dataItems = dataItems;
  this.inflater = inflater;
  this.listener = listener;
  this.cachedImageFetcher = cachedImageFetcher;

  // Determine how many thumbnails can be put onto one row.
  float thumbnailWithPx = PicViewConfig.ALBUM_THUMBNAIL_SIZE
      * displayMetrics.density;
  slotsPerRow = (int) Math
      .floor(displayMetrics.widthPixels / thumbnailWithPx);
  Log.d(TAG, "Photos per row: " + slotsPerRow);
  slotWidth = displayMetrics.widthPixels / slotsPerRow;
}
 

import com.google.android.apps.picview.ui.ThumbnailItem; //導入依賴的package包/類
/**
 * Wraps a list of {@link Photo}s into a list of {@link ThumbnailItem}s, so
 * they can be displayed in the list.
 */
private static List<ThumbnailItem<Photo>> wrap(List<Photo> photos) {
  List<ThumbnailItem<Photo>> result = new ArrayList<ThumbnailItem<Photo>>();
  for (Photo photo : photos) {
    result.add(new ThumbnailItem<Photo>(photo.getName(), photo
        .getThumbnailUrl(), photo));
  }
  return result;
}
 

import com.google.android.apps.picview.ui.ThumbnailItem; //導入依賴的package包/類
/**
 * Wraps a list of {@link Album}s into a list of {@link ThumbnailItem}s, so
 * they can be displayed in the list.
 */
private static List<ThumbnailItem<Album>> wrap(List<Album> albums) {
  List<ThumbnailItem<Album>> result = new ArrayList<ThumbnailItem<Album>>();
  for (Album album : albums) {
    result.add(new ThumbnailItem<Album>(album.getName(), album
        .getThumbnailUrl(), album));
  }
  return result;
}
 

import com.google.android.apps.picview.ui.ThumbnailItem; //導入依賴的package包/類
/**
 * Recycles a slot view, if it already exists. This means, changing the title,
 * stopping a previous image loading task and instantiating a new image
 * loading task.
 * 
 * @param slot
 *          the slot to recycle
 * @param item
 *          the item that holds the data for the slot
 */
private void recycleSlotView(ThumbnailSlotView slot,
    final ThumbnailItem<T> item) {
  slot.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
      listener.thumbnailClicked(item.getDataObject());
    }
  });

  TextView picTitle = (TextView) slot.findViewById(R.id.picture_title);
  picTitle.setText(item.getTitle());

  // We need to cancel the UI update of the image loading task for this
  // slot, if one is present and instead set the loading icon.
  ImageLoadingTask previousLoadingTask = slot.getImageLoadingTask();
  if (previousLoadingTask != null) {
    previousLoadingTask.setCancelUiUpdate(true);
  }

  ImageView albumThumbnail = (ImageView) slot
      .findViewById(R.id.album_thumbnail);

  // The ImageLoadingTask will load the thumbnail asynchronously and set
  // the result as soon as the response is in. The image will be set
  // immediately, if the result is already in cache.
  try {
    ImageLoadingTask task = new ImageLoadingTask(albumThumbnail, new URL(
        item.getThumbnailUrl()), cachedImageFetcher);
    slot.setImageLoadingTask(task);
    task.execute();
  } catch (MalformedURLException e) {
    e.printStackTrace();
  }
}
 

import com.google.android.apps.picview.ui.ThumbnailItem; //導入依賴的package包/類
public AlbumsAdapter(List<ThumbnailItem<Album>> dataItems,
    LayoutInflater inflater, ThumbnailClickListener<Album> listener,
    CachedImageFetcher cachedImageFetcher, DisplayMetrics displayMetrics) {
  super(dataItems, inflater, listener, cachedImageFetcher, displayMetrics);
}
 

import com.google.android.apps.picview.ui.ThumbnailItem; //導入依賴的package包/類
public PhotosAdapter(List<ThumbnailItem<Photo>> dataItems,
    LayoutInflater inflater, ThumbnailClickListener<Photo> listener,
    CachedImageFetcher cachedImageFetcher, DisplayMetrics displayMetrics) {
  super(dataItems, inflater, listener, cachedImageFetcher, displayMetrics);
}
 

import com.google.android.apps.picview.ui.ThumbnailItem; //導入依賴的package包/類
@Override
public View getView(int position, View convertView, ViewGroup parent) {
  LinearLayout row = (LinearLayout) convertView;
  ThumbnailSlotView[] slotViews = new ThumbnailSlotView[slotsPerRow];

  // If we are supposed to recycle the view, clear it first. We are
  // caching all the image views anyway.
  if (row != null && row.getChildCount() == slotsPerRow) {

    // We recycle all of them.
    for (int i = 0; i < slotsPerRow; ++i) {
      slotViews[i] = (ThumbnailSlotView) row.getChildAt(i);
    }
  } else {

    // Nothing to recycle, so we create a new row.
    row = new LinearLayout(inflater.getContext());
    row.setBackgroundColor(Color.BLACK);
    row.setOrientation(LinearLayout.HORIZONTAL);
    row.setGravity(Gravity.CENTER_HORIZONTAL);
    row.setPadding(0, 15, 0, 0);

    // We need to create new slots.
    for (int i = 0; i < slotsPerRow; ++i) {
      slotViews[i] = createNewSlotView(parent);
      row.addView(slotViews[i]);
    }
  }

  // Add the columns/slots to the row.
  for (int i = 0; i < slotsPerRow; ++i) {
    int dataIndex = (position * slotsPerRow) + i;
    if (dataIndex >= dataItems.size()) {
      break;
    }
    final ThumbnailItem<T> thumbnailData = dataItems.get(dataIndex);

    recycleSlotView(slotViews[i], thumbnailData);
  }
  return row;
}