src/com/android/dreams/phototable/PicasaSource.java - platform/packages/screensavers/PhotoTable - Git at Google

 /*
  * Copyright (C) 2012 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 package com.android.dreams.phototable;

 import android.content.Context;
 import android.content.SharedPreferences;
 import android.database.Cursor;
 import android.net.ConnectivityManager;
 import android.net.Uri;
 import android.util.DisplayMetrics;
 import android.util.Log;
 import android.view.WindowManager;

 import java.io.FileNotFoundException;
 import java.io.InputStream;
 import java.io.IOException;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.Set;

 /**
  * Loads images from Picasa.
  */
 public class PicasaSource extends PhotoSource {
     private static final String TAG = "PhotoTable.PicasaSource";

     private static final String PICASA_AUTHORITY =
             "com.google.android.gallery3d.GooglePhotoProvider";

     private static final String PICASA_PHOTO_PATH = "photos";
     private static final String PICASA_ALBUM_PATH = "albums";
     private static final String PICASA_USER_PATH = "users";

     private static final String PICASA_ID = "_id";
     private static final String PICASA_URL = "content_url";
     private static final String PICASA_ROTATION = "rotation";
     private static final String PICASA_ALBUM_ID = "album_id";
     private static final String PICASA_TITLE = "title";
     private static final String PICASA_THUMB = "thumbnail_url";
     private static final String PICASA_ALBUM_TYPE = "album_type";
     private static final String PICASA_ALBUM_USER = "user_id";
     private static final String PICASA_ALBUM_UPDATED = "date_updated";
     private static final String PICASA_ACCOUNT = "account";

     private static final String PICASA_URL_KEY = "content_url";
     private static final String PICASA_TYPE_KEY = "type";
     private static final String PICASA_TYPE_FULL_VALUE = "full";
     private static final String PICASA_TYPE_SCREEN_VALUE = "screennail";
     private static final String PICASA_TYPE_THUMB_VALUE = "thumbnail";
     private static final String PICASA_TYPE_IMAGE_VALUE = "image";
     private static final String PICASA_POSTS_TYPE = "Buzz";
     private static final String PICASA_UPLOAD_TYPE = "InstantUpload";

     private final int mMaxPostAblums;
     private final String mPostsAlbumName;
     private final String mUploadsAlbumName;
     private final String mUnknownAlbumName;
     private final LinkedList<ImageData> mRecycleBin;
     private final ConnectivityManager mConnectivityManager;
     private final int mMaxRecycleSize;

     private Set<String> mFoundAlbumIds;
     private int mNextPosition;
     private int mDisplayLongSide;

     public PicasaSource(Context context, SharedPreferences settings) {
         super(context, settings);
         mSourceName = TAG;
         mNextPosition = -1;
         mMaxPostAblums = mResources.getInteger(R.integer.max_post_albums);
         mPostsAlbumName = mResources.getString(R.string.posts_album_name, "Posts");
         mUploadsAlbumName = mResources.getString(R.string.uploads_album_name, "Instant Uploads");
         mUnknownAlbumName = mResources.getString(R.string.unknown_album_name, "Unknown");
         mMaxRecycleSize = mResources.getInteger(R.integer.recycle_image_pool_size);
         mConnectivityManager =
                 (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
         mRecycleBin = new LinkedList<ImageData>();
         fillQueue();
         mDisplayLongSide = getDisplayLongSide();
     }

     private int getDisplayLongSide() {
         DisplayMetrics metrics = new DisplayMetrics();
         WindowManager wm = (WindowManager)
                 mContext.getSystemService(Context.WINDOW_SERVICE);
         wm.getDefaultDisplay().getMetrics(metrics);
         return Math.max(metrics.heightPixels, metrics.widthPixels);
     }

     @Override
     protected Collection<ImageData> findImages(int howMany) {
         log(TAG, "finding images");
         LinkedList<ImageData> foundImages = new LinkedList<ImageData>();
         if (mConnectivityManager.isActiveNetworkMetered()) {
             howMany = Math.min(howMany, mMaxRecycleSize);
             log(TAG, "METERED: " + howMany);
             if (!mRecycleBin.isEmpty()) {
                 foundImages.addAll(mRecycleBin);
                 log(TAG, "recycled " + foundImages.size() + " items.");
                 return foundImages;
             }
         }

         String[] projection = {PICASA_ID, PICASA_URL, PICASA_ROTATION, PICASA_ALBUM_ID};
         boolean usePosts = false;
         LinkedList<String> albumIds = new LinkedList<String>();
         for (String id : getFoundAlbums()) {
             if (mSettings.isAlbumEnabled(id)) {
                 String[] parts = id.split(":");
                 if (parts.length > 2) {
                     albumIds.addAll(resolveAlbumIds(id));
                 } else {
                     albumIds.add(parts[1]);
                 }
             }
         }

         if (albumIds.size() > mMaxPostAblums) {
             Collections.shuffle(albumIds);
         }

         StringBuilder selection = new StringBuilder();
         int albumIdx = 0;
         for (String albumId : albumIds) {
             if (albumIdx < mMaxPostAblums) {
                 if (selection.length() > 0) {
                     selection.append(" OR ");
                 }
                 log(TAG, "adding: " + albumId);
                 selection.append(PICASA_ALBUM_ID + " = '" + albumId + "'");
             } else {
                 log(TAG, "too many albums, dropping: " + albumId);
             }
             albumIdx++;
         }

         if (selection.length() == 0) {
             return foundImages;
         }

         log(TAG, "selection is (" + selection.length() + "): " + selection.toString());

         Uri.Builder picasaUriBuilder = new Uri.Builder()
                 .scheme("content")
                 .authority(PICASA_AUTHORITY)
                 .appendPath(PICASA_PHOTO_PATH);
         Cursor cursor = mResolver.query(picasaUriBuilder.build(),
                 projection, selection.toString(), null, null);
         if (cursor != null) {
             if (cursor.getCount() > howMany && mNextPosition == -1) {
                 mNextPosition =
                         (int) Math.abs(mRNG.nextInt() % (cursor.getCount() - howMany));
             }
             if (mNextPosition == -1) {
                 mNextPosition = 0;
             }
             log(TAG, "moving to position: " + mNextPosition);
             cursor.moveToPosition(mNextPosition);

             int idIndex = cursor.getColumnIndex(PICASA_ID);
             int urlIndex = cursor.getColumnIndex(PICASA_URL);
             int orientationIndex = cursor.getColumnIndex(PICASA_ROTATION);
             int bucketIndex = cursor.getColumnIndex(PICASA_ALBUM_ID);

             if (idIndex < 0) {
                 log(TAG, "can't find the ID column!");
             } else {
                 while (foundImages.size() < howMany && !cursor.isAfterLast()) {
                     if (idIndex >= 0) {
                         ImageData data = new ImageData();
                         data.id = cursor.getString(idIndex);

                         if (urlIndex >= 0) {
                             data.url = cursor.getString(urlIndex);
                         }

                         foundImages.offer(data);
                     }
                     if (cursor.moveToNext()) {
                         mNextPosition++;
                     }
                 }
                 if (cursor.isAfterLast()) {
                     mNextPosition = 0;
                 }
             }

             cursor.close();
         } else {
             Log.w(TAG, "received a null cursor in findImages()");
         }
         log(TAG, "found " + foundImages.size() + " items.");
         return foundImages;
     }

     private String resolveAccount(String id) {
         String displayName = "unknown";
         String[] projection = {PICASA_ACCOUNT};
         Uri.Builder picasaUriBuilder = new Uri.Builder()
                 .scheme("content")
                 .authority(PICASA_AUTHORITY)
                 .appendPath(PICASA_USER_PATH)
                 .appendPath(id);
         Cursor cursor = mResolver.query(picasaUriBuilder.build(),
                 projection, null, null, null);
         if (cursor != null) {
             cursor.moveToFirst();
             int accountIndex = cursor.getColumnIndex(PICASA_ACCOUNT);
             if (accountIndex >= 0) {
                 displayName = cursor.getString(accountIndex);
             }
             cursor.close();
         } else {
             Log.w(TAG, "received a null cursor in resolveAccount()");
         }
         return displayName;
     }

     private Collection<String> resolveAlbumIds(String id) {
         LinkedList<String> albumIds = new LinkedList<String>();
         log(TAG, "resolving " + id);

         String[] parts = id.split(":");
         if (parts.length < 3) {
             return albumIds;
         }

         String[] projection = {PICASA_ID, PICASA_ALBUM_TYPE, PICASA_ALBUM_UPDATED,
                                PICASA_ALBUM_USER};
         String order = PICASA_ALBUM_UPDATED + " DESC";
         String selection = (PICASA_ALBUM_USER + " = '" + parts[2] + "' AND " +
                             PICASA_ALBUM_TYPE + " = '" + parts[1] + "'");
         Uri.Builder picasaUriBuilder = new Uri.Builder()
                 .scheme("content")
                 .authority(PICASA_AUTHORITY)
                 .appendPath(PICASA_ALBUM_PATH)
                 .appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_IMAGE_VALUE);
         Cursor cursor = mResolver.query(picasaUriBuilder.build(),
                 projection, selection, null, order);
         if (cursor != null) {
             log(TAG, " " + id + " resolved to " + cursor.getCount() + " albums");
             cursor.moveToFirst();

             int idIndex = cursor.getColumnIndex(PICASA_ID);
             int typeIndex = cursor.getColumnIndex(PICASA_ALBUM_TYPE);

             if (idIndex < 0) {
                 log(TAG, "can't find the ID column!");
             } else {
                 while (!cursor.isAfterLast()) {
                     albumIds.add(cursor.getString(idIndex));
                     cursor.moveToNext();
                 }
             }
             cursor.close();
         } else {
             Log.w(TAG, "received a null cursor in resolveAlbumIds()");
         }
         return albumIds;
     }

     private Set<String> getFoundAlbums() {
         if (mFoundAlbumIds == null) {
             findAlbums();
         }
         return mFoundAlbumIds;
     }

     @Override
     public Collection<AlbumData> findAlbums() {
         log(TAG, "finding albums");
         HashMap<String, AlbumData> foundAlbums = new HashMap<String, AlbumData>();
         HashMap<String, String> accounts = new HashMap<String, String>();
         String[] projection = {PICASA_ID, PICASA_TITLE, PICASA_THUMB, PICASA_ALBUM_TYPE,
                                PICASA_ALBUM_USER, PICASA_ALBUM_UPDATED};
         Uri.Builder picasaUriBuilder = new Uri.Builder()
                 .scheme("content")
                 .authority(PICASA_AUTHORITY)
                 .appendPath(PICASA_ALBUM_PATH)
                 .appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_IMAGE_VALUE);
         Cursor cursor = mResolver.query(picasaUriBuilder.build(),
                 projection, null, null, null);
         if (cursor != null) {
             cursor.moveToFirst();

             int idIndex = cursor.getColumnIndex(PICASA_ID);
             int thumbIndex = cursor.getColumnIndex(PICASA_THUMB);
             int titleIndex = cursor.getColumnIndex(PICASA_TITLE);
             int typeIndex = cursor.getColumnIndex(PICASA_ALBUM_TYPE);
             int updatedIndex = cursor.getColumnIndex(PICASA_ALBUM_UPDATED);
             int userIndex = cursor.getColumnIndex(PICASA_ALBUM_USER);

             if (idIndex < 0) {
                 log(TAG, "can't find the ID column!");
             } else {
                 while (!cursor.isAfterLast()) {
                     String id = TAG + ":" + cursor.getString(idIndex);
                     String user = (userIndex >= 0 ? cursor.getString(userIndex) : "-1");
                     String type = (typeIndex >= 0 ? cursor.getString(typeIndex) : "none");
                     boolean isPosts = (typeIndex >= 0 && PICASA_POSTS_TYPE.equals(type));
                     boolean isUpload = (typeIndex >= 0 && PICASA_UPLOAD_TYPE.equals(type));

                     String account = accounts.get(user);
                     if (account == null) {
                         account = resolveAccount(user);
                         accounts.put(user, account);
                     }

                     if (isPosts) {
                         log(TAG, "replacing " + id + " with " + PICASA_POSTS_TYPE);
                         id = TAG + ":" + PICASA_POSTS_TYPE + ":" + user;
                     }

                     if (isUpload) {
                         log(TAG, "replacing " + id + " with " + PICASA_UPLOAD_TYPE);
                         id = TAG + ":" + PICASA_UPLOAD_TYPE + ":" + user;
                     }

                     String thumbnailUrl = null;
                     long updated = 0;
                     AlbumData data = foundAlbums.get(id);
                     if (data == null) {
                         data = new AlbumData();
                         data.id = id;
                         data.account = account;

                         if (isPosts) {
                             data.title = mPostsAlbumName;
                         } else if (isUpload) {
                             data.title = mUploadsAlbumName;
                         } else if (titleIndex >= 0) {
                             data.title = cursor.getString(titleIndex);
                         } else {
                             data.title = mUnknownAlbumName;
                         }

                         log(TAG, "found " + data.title + "(" + data.id + ")" +
                                 " of type " + type + " owned by " + user);
                         foundAlbums.put(id, data);
                     }

                     if (updatedIndex >= 0) {
                         updated = cursor.getLong(updatedIndex);
                     }

                     if (thumbIndex >= 0) {
                         thumbnailUrl = cursor.getString(thumbIndex);
                     }

                     data.updated = (long) Math.max(data.updated, updated);

                     if (data.thumbnailUrl == null || data.updated == updated) {
                         data.thumbnailUrl = thumbnailUrl;
                     }

                     cursor.moveToNext();
                 }
             }
             cursor.close();

         } else {
             Log.w(TAG, "received a null cursor in findAlbums()");
         }
         log(TAG, "found " + foundAlbums.size() + " items.");
         mFoundAlbumIds = foundAlbums.keySet();
         return foundAlbums.values();
     }

     @Override
     protected InputStream getStream(ImageData data, int longSide) {
         InputStream is = null;
         try {
             Uri.Builder photoUriBuilder = new Uri.Builder()
                     .scheme("content")
                     .authority(PICASA_AUTHORITY)
                     .appendPath(PICASA_PHOTO_PATH)
                     .appendPath(data.id);
             if (mConnectivityManager.isActiveNetworkMetered() ||
                     ((2 * longSide) <= mDisplayLongSide)) {
                 photoUriBuilder.appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_SCREEN_VALUE);
             } else {
                 photoUriBuilder.appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_FULL_VALUE);
             }
             if (data.url != null) {
                 photoUriBuilder.appendQueryParameter(PICASA_URL_KEY, data.url);
             }
             is = mResolver.openInputStream(photoUriBuilder.build());
         } catch (FileNotFoundException fnf) {
             log(TAG, "file not found: " + fnf);
             is = null;
         } catch (IOException ioe) {
             log(TAG, "i/o exception: " + ioe);
             is = null;
         }

         if (is != null) {
             mRecycleBin.offer(data);
             log(TAG, "RECYCLED");
             while (mRecycleBin.size() > mMaxRecycleSize) {
                 mRecycleBin.poll();
             }
         }
         return is;
     }
 }
	/*
	* Copyright (C) 2012 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/
	package com.android.dreams.phototable;

	import android.content.Context;
	import android.content.SharedPreferences;
	import android.database.Cursor;
	import android.net.ConnectivityManager;
	import android.net.Uri;
	import android.util.DisplayMetrics;
	import android.util.Log;
	import android.view.WindowManager;

	import java.io.FileNotFoundException;
	import java.io.InputStream;
	import java.io.IOException;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.HashMap;
	import java.util.LinkedList;
	import java.util.Set;

	/**
	* Loads images from Picasa.
	*/
	public class PicasaSource extends PhotoSource {
	private static final String TAG = "PhotoTable.PicasaSource";

	private static final String PICASA_AUTHORITY =
	"com.google.android.gallery3d.GooglePhotoProvider";

	private static final String PICASA_PHOTO_PATH = "photos";
	private static final String PICASA_ALBUM_PATH = "albums";
	private static final String PICASA_USER_PATH = "users";

	private static final String PICASA_ID = "_id";
	private static final String PICASA_URL = "content_url";
	private static final String PICASA_ROTATION = "rotation";
	private static final String PICASA_ALBUM_ID = "album_id";
	private static final String PICASA_TITLE = "title";
	private static final String PICASA_THUMB = "thumbnail_url";
	private static final String PICASA_ALBUM_TYPE = "album_type";
	private static final String PICASA_ALBUM_USER = "user_id";
	private static final String PICASA_ALBUM_UPDATED = "date_updated";
	private static final String PICASA_ACCOUNT = "account";

	private static final String PICASA_URL_KEY = "content_url";
	private static final String PICASA_TYPE_KEY = "type";
	private static final String PICASA_TYPE_FULL_VALUE = "full";
	private static final String PICASA_TYPE_SCREEN_VALUE = "screennail";
	private static final String PICASA_TYPE_THUMB_VALUE = "thumbnail";
	private static final String PICASA_TYPE_IMAGE_VALUE = "image";
	private static final String PICASA_POSTS_TYPE = "Buzz";
	private static final String PICASA_UPLOAD_TYPE = "InstantUpload";

	private final int mMaxPostAblums;
	private final String mPostsAlbumName;
	private final String mUploadsAlbumName;
	private final String mUnknownAlbumName;
	private final LinkedList<ImageData> mRecycleBin;
	private final ConnectivityManager mConnectivityManager;
	private final int mMaxRecycleSize;

	private Set<String> mFoundAlbumIds;
	private int mNextPosition;
	private int mDisplayLongSide;

	public PicasaSource(Context context, SharedPreferences settings) {
	super(context, settings);
	mSourceName = TAG;
	mNextPosition = -1;
	mMaxPostAblums = mResources.getInteger(R.integer.max_post_albums);
	mPostsAlbumName = mResources.getString(R.string.posts_album_name, "Posts");
	mUploadsAlbumName = mResources.getString(R.string.uploads_album_name, "Instant Uploads");
	mUnknownAlbumName = mResources.getString(R.string.unknown_album_name, "Unknown");
	mMaxRecycleSize = mResources.getInteger(R.integer.recycle_image_pool_size);
	mConnectivityManager =
	(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
	mRecycleBin = new LinkedList<ImageData>();
	fillQueue();
	mDisplayLongSide = getDisplayLongSide();
	}

	private int getDisplayLongSide() {
	DisplayMetrics metrics = new DisplayMetrics();
	WindowManager wm = (WindowManager)
	mContext.getSystemService(Context.WINDOW_SERVICE);
	wm.getDefaultDisplay().getMetrics(metrics);
	return Math.max(metrics.heightPixels, metrics.widthPixels);
	}

	@Override
	protected Collection<ImageData> findImages(int howMany) {
	log(TAG, "finding images");
	LinkedList<ImageData> foundImages = new LinkedList<ImageData>();
	if (mConnectivityManager.isActiveNetworkMetered()) {
	howMany = Math.min(howMany, mMaxRecycleSize);
	log(TAG, "METERED: " + howMany);
	if (!mRecycleBin.isEmpty()) {
	foundImages.addAll(mRecycleBin);
	log(TAG, "recycled " + foundImages.size() + " items.");
	return foundImages;
	}
	}

	String[] projection = {PICASA_ID, PICASA_URL, PICASA_ROTATION, PICASA_ALBUM_ID};
	boolean usePosts = false;
	LinkedList<String> albumIds = new LinkedList<String>();
	for (String id : getFoundAlbums()) {
	if (mSettings.isAlbumEnabled(id)) {
	String[] parts = id.split(":");
	if (parts.length > 2) {
	albumIds.addAll(resolveAlbumIds(id));
	} else {
	albumIds.add(parts[1]);
	}
	}
	}

	if (albumIds.size() > mMaxPostAblums) {
	Collections.shuffle(albumIds);
	}

	StringBuilder selection = new StringBuilder();
	int albumIdx = 0;
	for (String albumId : albumIds) {
	if (albumIdx < mMaxPostAblums) {
	if (selection.length() > 0) {
	selection.append(" OR ");
	}
	log(TAG, "adding: " + albumId);
	selection.append(PICASA_ALBUM_ID + " = '" + albumId + "'");
	} else {
	log(TAG, "too many albums, dropping: " + albumId);
	}
	albumIdx++;
	}

	if (selection.length() == 0) {
	return foundImages;
	}

	log(TAG, "selection is (" + selection.length() + "): " + selection.toString());

	Uri.Builder picasaUriBuilder = new Uri.Builder()
	.scheme("content")
	.authority(PICASA_AUTHORITY)
	.appendPath(PICASA_PHOTO_PATH);
	Cursor cursor = mResolver.query(picasaUriBuilder.build(),
	projection, selection.toString(), null, null);
	if (cursor != null) {
	if (cursor.getCount() > howMany && mNextPosition == -1) {
	mNextPosition =
	(int) Math.abs(mRNG.nextInt() % (cursor.getCount() - howMany));
	}
	if (mNextPosition == -1) {
	mNextPosition = 0;
	}
	log(TAG, "moving to position: " + mNextPosition);
	cursor.moveToPosition(mNextPosition);

	int idIndex = cursor.getColumnIndex(PICASA_ID);
	int urlIndex = cursor.getColumnIndex(PICASA_URL);
	int orientationIndex = cursor.getColumnIndex(PICASA_ROTATION);
	int bucketIndex = cursor.getColumnIndex(PICASA_ALBUM_ID);

	if (idIndex < 0) {
	log(TAG, "can't find the ID column!");
	} else {
	while (foundImages.size() < howMany && !cursor.isAfterLast()) {
	if (idIndex >= 0) {
	ImageData data = new ImageData();
	data.id = cursor.getString(idIndex);

	if (urlIndex >= 0) {
	data.url = cursor.getString(urlIndex);
	}

	foundImages.offer(data);
	}
	if (cursor.moveToNext()) {
	mNextPosition++;
	}
	}
	if (cursor.isAfterLast()) {
	mNextPosition = 0;
	}
	}

	cursor.close();
	} else {
	Log.w(TAG, "received a null cursor in findImages()");
	}
	log(TAG, "found " + foundImages.size() + " items.");
	return foundImages;
	}

	private String resolveAccount(String id) {
	String displayName = "unknown";
	String[] projection = {PICASA_ACCOUNT};
	Uri.Builder picasaUriBuilder = new Uri.Builder()
	.scheme("content")
	.authority(PICASA_AUTHORITY)
	.appendPath(PICASA_USER_PATH)
	.appendPath(id);
	Cursor cursor = mResolver.query(picasaUriBuilder.build(),
	projection, null, null, null);
	if (cursor != null) {
	cursor.moveToFirst();
	int accountIndex = cursor.getColumnIndex(PICASA_ACCOUNT);
	if (accountIndex >= 0) {
	displayName = cursor.getString(accountIndex);
	}
	cursor.close();
	} else {
	Log.w(TAG, "received a null cursor in resolveAccount()");
	}
	return displayName;
	}

	private Collection<String> resolveAlbumIds(String id) {
	LinkedList<String> albumIds = new LinkedList<String>();
	log(TAG, "resolving " + id);

	String[] parts = id.split(":");
	if (parts.length < 3) {
	return albumIds;
	}

	String[] projection = {PICASA_ID, PICASA_ALBUM_TYPE, PICASA_ALBUM_UPDATED,
	PICASA_ALBUM_USER};
	String order = PICASA_ALBUM_UPDATED + " DESC";
	String selection = (PICASA_ALBUM_USER + " = '" + parts[2] + "' AND " +
	PICASA_ALBUM_TYPE + " = '" + parts[1] + "'");
	Uri.Builder picasaUriBuilder = new Uri.Builder()
	.scheme("content")
	.authority(PICASA_AUTHORITY)
	.appendPath(PICASA_ALBUM_PATH)
	.appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_IMAGE_VALUE);
	Cursor cursor = mResolver.query(picasaUriBuilder.build(),
	projection, selection, null, order);
	if (cursor != null) {
	log(TAG, " " + id + " resolved to " + cursor.getCount() + " albums");
	cursor.moveToFirst();

	int idIndex = cursor.getColumnIndex(PICASA_ID);
	int typeIndex = cursor.getColumnIndex(PICASA_ALBUM_TYPE);

	if (idIndex < 0) {
	log(TAG, "can't find the ID column!");
	} else {
	while (!cursor.isAfterLast()) {
	albumIds.add(cursor.getString(idIndex));
	cursor.moveToNext();
	}
	}
	cursor.close();
	} else {
	Log.w(TAG, "received a null cursor in resolveAlbumIds()");
	}
	return albumIds;
	}

	private Set<String> getFoundAlbums() {
	if (mFoundAlbumIds == null) {
	findAlbums();
	}
	return mFoundAlbumIds;
	}

	@Override
	public Collection<AlbumData> findAlbums() {
	log(TAG, "finding albums");
	HashMap<String, AlbumData> foundAlbums = new HashMap<String, AlbumData>();
	HashMap<String, String> accounts = new HashMap<String, String>();
	String[] projection = {PICASA_ID, PICASA_TITLE, PICASA_THUMB, PICASA_ALBUM_TYPE,
	PICASA_ALBUM_USER, PICASA_ALBUM_UPDATED};
	Uri.Builder picasaUriBuilder = new Uri.Builder()
	.scheme("content")
	.authority(PICASA_AUTHORITY)
	.appendPath(PICASA_ALBUM_PATH)
	.appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_IMAGE_VALUE);
	Cursor cursor = mResolver.query(picasaUriBuilder.build(),
	projection, null, null, null);
	if (cursor != null) {
	cursor.moveToFirst();

	int idIndex = cursor.getColumnIndex(PICASA_ID);
	int thumbIndex = cursor.getColumnIndex(PICASA_THUMB);
	int titleIndex = cursor.getColumnIndex(PICASA_TITLE);
	int typeIndex = cursor.getColumnIndex(PICASA_ALBUM_TYPE);
	int updatedIndex = cursor.getColumnIndex(PICASA_ALBUM_UPDATED);
	int userIndex = cursor.getColumnIndex(PICASA_ALBUM_USER);

	if (idIndex < 0) {
	log(TAG, "can't find the ID column!");
	} else {
	while (!cursor.isAfterLast()) {
	String id = TAG + ":" + cursor.getString(idIndex);
	String user = (userIndex >= 0 ? cursor.getString(userIndex) : "-1");
	String type = (typeIndex >= 0 ? cursor.getString(typeIndex) : "none");
	boolean isPosts = (typeIndex >= 0 && PICASA_POSTS_TYPE.equals(type));
	boolean isUpload = (typeIndex >= 0 && PICASA_UPLOAD_TYPE.equals(type));

	String account = accounts.get(user);
	if (account == null) {
	account = resolveAccount(user);
	accounts.put(user, account);
	}

	if (isPosts) {
	log(TAG, "replacing " + id + " with " + PICASA_POSTS_TYPE);
	id = TAG + ":" + PICASA_POSTS_TYPE + ":" + user;
	}

	if (isUpload) {
	log(TAG, "replacing " + id + " with " + PICASA_UPLOAD_TYPE);
	id = TAG + ":" + PICASA_UPLOAD_TYPE + ":" + user;
	}

	String thumbnailUrl = null;
	long updated = 0;
	AlbumData data = foundAlbums.get(id);
	if (data == null) {
	data = new AlbumData();
	data.id = id;
	data.account = account;

	if (isPosts) {
	data.title = mPostsAlbumName;
	} else if (isUpload) {
	data.title = mUploadsAlbumName;
	} else if (titleIndex >= 0) {
	data.title = cursor.getString(titleIndex);
	} else {
	data.title = mUnknownAlbumName;
	}

	log(TAG, "found " + data.title + "(" + data.id + ")" +
	" of type " + type + " owned by " + user);
	foundAlbums.put(id, data);
	}

	if (updatedIndex >= 0) {
	updated = cursor.getLong(updatedIndex);
	}

	if (thumbIndex >= 0) {
	thumbnailUrl = cursor.getString(thumbIndex);
	}

	data.updated = (long) Math.max(data.updated, updated);

	if (data.thumbnailUrl == null \|\| data.updated == updated) {
	data.thumbnailUrl = thumbnailUrl;
	}

	cursor.moveToNext();
	}
	}
	cursor.close();

	} else {
	Log.w(TAG, "received a null cursor in findAlbums()");
	}
	log(TAG, "found " + foundAlbums.size() + " items.");
	mFoundAlbumIds = foundAlbums.keySet();
	return foundAlbums.values();
	}

	@Override
	protected InputStream getStream(ImageData data, int longSide) {
	InputStream is = null;
	try {
	Uri.Builder photoUriBuilder = new Uri.Builder()
	.scheme("content")
	.authority(PICASA_AUTHORITY)
	.appendPath(PICASA_PHOTO_PATH)
	.appendPath(data.id);
	if (mConnectivityManager.isActiveNetworkMetered() \|\|
	((2 * longSide) <= mDisplayLongSide)) {
	photoUriBuilder.appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_SCREEN_VALUE);
	} else {
	photoUriBuilder.appendQueryParameter(PICASA_TYPE_KEY, PICASA_TYPE_FULL_VALUE);
	}
	if (data.url != null) {
	photoUriBuilder.appendQueryParameter(PICASA_URL_KEY, data.url);
	}
	is = mResolver.openInputStream(photoUriBuilder.build());
	} catch (FileNotFoundException fnf) {
	log(TAG, "file not found: " + fnf);
	is = null;
	} catch (IOException ioe) {
	log(TAG, "i/o exception: " + ioe);
	is = null;
	}

	if (is != null) {
	mRecycleBin.offer(data);
	log(TAG, "RECYCLED");
	while (mRecycleBin.size() > mMaxRecycleSize) {
	mRecycleBin.poll();
	}
	}
	return is;
	}
	}