这就是我在活动中获取多张照片的方式。您可以使用它的一部分来适应您的逻辑。我用它来从相册中获取Facebook图片。因此，我的需求（我假设）与您的需求不同。但同样，该逻辑可能对您有用。
注意： 这将很长。;-)
这些是通过ACtivity使用的全局声明：
// HOLD THE URL TO MAKE THE API CALL TOprivate String URL;// STORE THE PAGING URLprivate String pagingURL;// FLAG FOR CURRENT PAGEint current_page = 1;// BOOLEAN TO CHECK IF NEW FEEDS ARE LOADINGBoolean loadingMore = true;Boolean stopLoadingData = false;
这是获取初始图像集的代码块：
private class getPhotosData extends AsyncTask<Void, Void, Void> { @Override protected Void doInBackground(Void... arg0) { // CHANGE THE LOADING MORE STATUS TO PREVENT DUPLICATE CALLS FOR // MORE DATA WHILE LOADING A BATCH loadingMore = true; // SET THE INITIAL URL TO GET THE FIRST LOT OF ALBUMS URL = "https://graph.facebook.com/" + initialAlbumID + "/photos&access_token=" + Utility.mFacebook.getAccessToken() + "?limit=10"; try { HttpClient hc = new DefaultHttpClient(); HttpGet get = new HttpGet(URL); HttpResponse rp = hc.execute(get); if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { String queryAlbums = EntityUtils.toString(rp.getEntity()); JSonObject JOTemp = new JSonObject(queryAlbums); JSonArray JAPhotos = JOTemp.getJSonArray("data"); // IN MY CODE, I GET THE NEXT PAGE link HERE getPhotos photos; for (int i = 0; i < JAPhotos.length(); i++) { JSonObject JOPhotos = JAPhotos.getJSonObject(i); // Log.e("INDIVIDUAL ALBUMS", JOPhotos.toString()); if (JOPhotos.has("link")) { photos = new getPhotos(); // GET THE ALBUM ID if (JOPhotos.has("id")) { photos.setPhotoID(JOPhotos.getString("id")); } else { photos.setPhotoID(null); } // GET THE ALBUM NAME if (JOPhotos.has("name")) { photos.setPhotoname(JOPhotos.getString("name")); } else { photos.setPhotoname(null); } // GET THE ALBUM COVER PHOTO if (JOPhotos.has("picture")) { photos.setPhotoPicture(JOPhotos .getString("picture")); } else { photos.setPhotoPicture(null); } // GET THE PHOTO'S SOURCE if (JOPhotos.has("source")) { photos.setPhotoSource(JOPhotos .getString("source")); } else { photos.setPhotoSource(null); } arrPhotos.add(photos); } } } } catch (Exception e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Void result) { // SET THE ADAPTER TO THE GRIDVIEW gridOfPhotos.setAdapter(adapter); // CHANGE THE LOADING MORE STATUS loadingMore = false; }}这是为了检测用户何时滚动到末尾并获取新的图像集：
// ONSCROLLLISTENERgridOfPhotos.setonScrollListener(new onScrollListener() { @Override public void onScrollStateChanged(AbsListView view, int scrollState) { } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { int lastInScreen = firstVisibleItem + visibleItemCount; if ((lastInScreen == totalItemCount) && !(loadingMore)) { if (stopLoadingData == false) { // FETCH THE NEXT BATCH OF FEEDS new loadMorePhotos().execute(); } } }});最后，这就是我获取下一组图像的方式：
private class loadMorePhotos extends AsyncTask<Void, Void, Void> { @Override protected Void doInBackground(Void... arg0) { // SET LOADING MORE "TRUE" loadingMore = true; // INCREMENT CURRENT PAGE current_page += 1; // Next page request URL = pagingURL; try { HttpClient hc = new DefaultHttpClient(); HttpGet get = new HttpGet(URL); HttpResponse rp = hc.execute(get); if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { String queryAlbums = EntityUtils.toString(rp.getEntity()); // Log.e("PAGED RESULT", queryAlbums); JSonObject JOTemp = new JSonObject(queryAlbums); JSonArray JAPhotos = JOTemp.getJSonArray("data"); // IN MY CODE, I GET THE NEXT PAGE link HERE getPhotos photos; for (int i = 0; i < JAPhotos.length(); i++) { JSonObject JOPhotos = JAPhotos.getJSonObject(i); // Log.e("INDIVIDUAL ALBUMS", JOPhotos.toString()); if (JOPhotos.has("link")) { photos = new getPhotos(); // GET THE ALBUM ID if (JOPhotos.has("id")) { photos.setPhotoID(JOPhotos.getString("id")); } else { photos.setPhotoID(null); } // GET THE ALBUM NAME if (JOPhotos.has("name")) { photos.setPhotoname(JOPhotos.getString("name")); } else { photos.setPhotoname(null); } // GET THE ALBUM COVER PHOTO if (JOPhotos.has("picture")) { photos.setPhotoPicture(JOPhotos .getString("picture")); } else { photos.setPhotoPicture(null); } // GET THE ALBUM'S PHOTO COUNT if (JOPhotos.has("source")) { photos.setPhotoSource(JOPhotos .getString("source")); } else { photos.setPhotoSource(null); } arrPhotos.add(photos); } } } } catch (Exception e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Void result) { // get listview current position - used to maintain scroll position int currentPosition = gridOfPhotos.getFirstVisiblePosition(); // APPEND NEW DATA TO THE ARRAYLIST AND SET THE ADAPTER TO THE // LISTVIEW adapter = new PhotosAdapter(Photos.this, arrPhotos); gridOfPhotos.setAdapter(adapter); // Setting new scroll position gridOfPhotos.setSelection(currentPosition + 1); // SET LOADINGMORE "FALSE" AFTER ADDING NEW FEEDS TO THE EXISTING // LIST loadingMore = false; }}这是上述查询的帮助程序类
SET和
GET从查询中收集的数据：
public class getPhotos { String PhotoID; String PhotoName; String PhotoPicture; String PhotoSource; // SET THE PHOTO ID public void setPhotoID(String PhotoID) { this.PhotoID = PhotoID; } // GET THE PHOTO ID public String getPhotoID() { return PhotoID; } // SET THE PHOTO NAME public void setPhotoname(String PhotoName) { this.Photoname = PhotoName; } // GET THE PHOTO NAME public String getPhotoname() { return PhotoName; } // SET THE PHOTO PICTURE public void setPhotoPicture(String PhotoPicture) { this.PhotoPicture = PhotoPicture; } // GET THE PHOTO PICTURE public String getPhotoPicture() { return PhotoPicture; } // SET THE PHOTO SOURCE public void setPhotoSource(String PhotoSource) { this.PhotoSource = PhotoSource; } // GET THE PHOTO SOURCE public String getPhotoSource() { return PhotoSource; }}如果您还需要
adapter代码，请告诉我。我在适配器中使用Fedor的延迟加载方法。
ew 希望这对您有所帮助。如果您还有其他问题，请随时提问。:-)
编辑：添加的适配器代码：
public class PhotosAdapter extends baseAdapter { private Activity activity; ArrayList<getPhotos> arrayPhotos; private static LayoutInflater inflater = null; ImageLoader imageLoader; public PhotosAdapter(Activity a, ArrayList<getPhotos> arrPhotos) { activity = a; arrayPhotos = arrPhotos; inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE); imageLoader = new ImageLoader(activity.getApplicationContext()); } public int getCount() { return arrayPhotos.size(); } public Object getItem(int position) { return arrayPhotos.get(position); } public long getItemId(int position) { return position; } public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder holder; View vi = convertView; if(convertView == null) { vi = inflater.inflate(R.layout.photos_item, null); holder = new ViewHolder(); holder.imgPhoto = (ImageView)vi.findViewById(R.id.grid_item_image); vi.setTag(holder); } else { holder = (ViewHolder) vi.getTag(); } if (arrayPhotos.get(position).getPhotoPicture() != null){ imageLoader.DisplayImage(arrayPhotos.get(position).getPhotoPicture(), holder.imgPhoto); } return vi; } static class ViewHolder { ImageView imgPhoto; }}编辑：添加了显示加载时进度的步骤：
向您的XML添加一个ProgressBar，在其下方有GridView。如果重量有任何问题，请多加一些。
<LinearLayout android:id="@+id/linlaProgressBar" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:orientation="horizontal" > <ProgressBar android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="2dp" /></LinearLayout>
在您的Java中，将声明
LinearlayoutlinlaProgressBar为Global并将
onCreate()其强制转换为，并将其可见性设置为
linlaProgressBar.setVisibility(View.GONE);
并在
onPreExecute()使用中像这样：
@Overrideprotected void onPreExecute() { // SHOW THE BOTTOM PROGRESS BAR (SPINNER) WHILE LOADING MORE PHOTOS linlaProgressBar.setVisibility(View.VISIBLE);}最后在
onPostExecute()
// HIDE THE BOTTOM PROGRESS BAR (SPINNER) AFTER LOADING MORE ALBUMSlinlaProgressBar.setVisibility(View.GONE);
