/*
* Copyright (C) 2010 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.contacts;
import com.android.contacts.model.AccountTypeManager;
import com.android.contacts.util.MemoryUtils;
import com.android.contacts.util.UriUtils;
import com.google.android.collect.Lists;
import com.google.android.collect.Sets;
import android.content.ComponentCallbacks2;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.Context;
import android.content.res.Configuration;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Handler;
import android.os.Handler.Callback;
import android.os.HandlerThread;
import android.os.Message;
import android.provider.ContactsContract;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.Contacts.Photo;
import android.provider.ContactsContract.Data;
import android.provider.ContactsContract.Directory;
import android.text.TextUtils;
import android.util.Log;
import android.util.LruCache;
import android.widget.ImageView;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.lang.ref.Reference;
import java.lang.ref.SoftReference;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Asynchronously loads contact photos and maintains a cache of photos.
*/
public abstract class ContactPhotoManager implements ComponentCallbacks2 {
static final String TAG = "ContactPhotoManager";
static final boolean DEBUG = false; // Don't submit with true
public static final String CONTACT_PHOTO_SERVICE = "contactPhotos";
public static int getDefaultAvatarResId(boolean hires, boolean darkTheme) {
if (hires && darkTheme) return R.drawable.ic_contact_picture_180_holo_dark;
if (hires) return R.drawable.ic_contact_picture_180_holo_light;
if (darkTheme) return R.drawable.ic_contact_picture_holo_dark;
return R.drawable.ic_contact_picture_holo_light;
}
public static abstract class DefaultImageProvider {
public abstract void applyDefaultImage(ImageView view, boolean hires, boolean darkTheme);
}
private static class AvatarDefaultImageProvider extends DefaultImageProvider {
@Override
public void applyDefaultImage(ImageView view, boolean hires, boolean darkTheme) {
view.setImageResource(getDefaultAvatarResId(hires, darkTheme));
}
}
private static class BlankDefaultImageProvider extends DefaultImageProvider {
private static Drawable sDrawable;
@Override
public void applyDefaultImage(ImageView view, boolean hires, boolean darkTheme) {
if (sDrawable == null) {
Context context = view.getContext();
sDrawable = new ColorDrawable(context.getResources().getColor(
R.color.image_placeholder));
}
view.setImageDrawable(sDrawable);
}
}
public static final DefaultImageProvider DEFAULT_AVATER = new AvatarDefaultImageProvider();
public static final DefaultImageProvider DEFAULT_BLANK = new BlankDefaultImageProvider();
/**
* Requests the singleton instance of {@link AccountTypeManager} with data bound from
* the available authenticators. This method can safely be called from the UI thread.
*/
public static ContactPhotoManager getInstance(Context context) {
Context applicationContext = context.getApplicationContext();
ContactPhotoManager service =
(ContactPhotoManager) applicationContext.getSystemService(CONTACT_PHOTO_SERVICE);
if (service == null) {
service = createContactPhotoManager(applicationContext);
Log.e(TAG, "No contact photo service in context: " + applicationContext);
}
return service;
}
public static synchronized ContactPhotoManager createContactPhotoManager(Context context) {
return new ContactPhotoManagerImpl(context);
}
/**
* Load photo into the supplied image view. If the photo is already cached,
* it is displayed immediately. Otherwise a request is sent to load the photo
* from the database.
*/
public abstract void loadPhoto(ImageView view, long photoId, boolean hires, boolean darkTheme,
DefaultImageProvider defaultProvider);
/**
* Calls {@link #loadPhoto(ImageView, long, boolean, boolean, DefaultImageProvider)} with
* {@link #DEFAULT_AVATER}.
*/
public final void loadPhoto(ImageView view, long photoId, boolean hires, boolean darkTheme) {
loadPhoto(view, photoId, hires, darkTheme, DEFAULT_AVATER);
}
/**
* Load photo into the supplied image view. If the photo is already cached,
* it is displayed immediately. Otherwise a request is sent to load the photo
* from the location specified by the URI.
*/
public abstract void loadPhoto(ImageView view, Uri photoUri, boolean hires, boolean darkTheme,
DefaultImageProvider defaultProvider);
/**
* Calls {@link #loadPhoto(ImageView, Uri, boolean, boolean, DefaultImageProvider)} with
* {@link #DEFAULT_AVATER}.
*/
public final void loadPhoto(ImageView view, Uri photoUri, boolean hires, boolean darkTheme) {
loadPhoto(view, photoUri, hires, darkTheme, DEFAULT_AVATER);
}
/**
* Remove photo from the supplied image view. This also cancels current pending load request
* inside this photo manager.
*/
public abstract void removePhoto(ImageView view);
/**
* Temporarily stops loading photos from the database.
*/
public abstract void pause();
/**
* Resumes loading photos from the database.
*/
public abstract void resume();
/**
* Marks all cached photos for reloading. We can continue using cache but should
* also make sure the photos haven't changed in the background and notify the views
* if so.
*/
public abstract void refreshCache();
/**
* Initiates a background process that over time will fill up cache with
* preload photos.
*/
public abstract void preloadPhotosInBackground();
// ComponentCallbacks2
@Override
public void onConfigurationChanged(Configuration newConfig) {
}
// ComponentCallbacks2
@Override
public void onLowMemory() {
}
// ComponentCallbacks2
@Override
public void onTrimMemory(int level) {
}
}
class ContactPhotoManagerImpl extends ContactPhotoManager implements Callback {
private static final String LOADER_THREAD_NAME = "ContactPhotoLoader";
/**
* Type of message sent by the UI thread to itself to indicate that some photos
* need to be loaded.
*/
private static final int MESSAGE_REQUEST_LOADING = 1;
/**
* Type of message sent by the loader thread to indicate that some photos have
* been loaded.
*/
private static final int MESSAGE_PHOTOS_LOADED = 2;
private static final String[] EMPTY_STRING_ARRAY = new String[0];
private static final String[] COLUMNS = new String[] { Photo._ID, Photo.PHOTO };
/**
* Maintains the state of a particular photo.
*/
private static class BitmapHolder {
final byte[] bytes;
volatile boolean fresh;
Bitmap bitmap;
Reference<Bitmap> bitmapRef;
public BitmapHolder(byte[] bytes) {
this.bytes = bytes;
this.fresh = true;
}
}
private final Context mContext;
/**
* An LRU cache for bitmap holders. The cache contains bytes for photos just
* as they come from the database. Each holder has a soft reference to the
* actual bitmap.
*/
private final LruCache<Object, BitmapHolder> mBitmapHolderCache;
/**
* Cache size threshold at which bitmaps will not be preloaded.
*/
private final int mBitmapHolderCacheRedZoneBytes;
/**
* Level 2 LRU cache for bitmaps. This is a smaller cache that holds
* the most recently used bitmaps to save time on decoding
* them from bytes (the bytes are stored in {@link #mBitmapHolderCache}.
*/
private final LruCache<Object, Bitmap> mBitmapCache;
/**
* A map from ImageView to the corresponding photo ID or uri, encapsulated in a request.
* The request may swapped out before the photo loading request is started.
*/
private final ConcurrentHashMap<ImageView, Request> mPendingRequests =
new ConcurrentHashMap<ImageView, Request>();
/**
* Handler for messages sent to the UI thread.
*/
private final Handler mMainThreadHandler = new Handler(this);
/**
* Thread responsible for loading photos from the database. Created upon
* the first request.
*/
private LoaderThread mLoaderThread;
/**
* A gate to make sure we only send one instance of MESSAGE_PHOTOS_NEEDED at a time.
*/
private boolean mLoadingRequested;
/**
* Flag indicating if the image loading is paused.
*/
private boolean mPaused;
/** Cache size for {@link #mBitmapHolderCache} for devices with "large" RAM. */
private static final int HOLDER_CACHE_SIZE = 2000000;
/** Cache size for {@link #mBitmapCache} for devices with "large" RAM. */
private static final int BITMAP_CACHE_SIZE = 36864 * 48; // 1728K
private static final int LARGE_RAM_THRESHOLD = 640 * 1024 * 1024;
/** For debug: How many times we had to reload cached photo for a stale entry */
private final AtomicInteger mStaleCacheOverwrite = new AtomicInteger();
/** For debug: How many times we had to reload cached photo for a fresh entry. Should be 0. */
private final AtomicInteger mFreshCacheOverwrite = new AtomicInteger();
public ContactPhotoManagerImpl(Context context) {
mContext = context;
final float cacheSizeAdjustment =
(MemoryUtils.getTotalMemorySize() >= LARGE_RAM_THRESHOLD) ? 1.0f : 0.5f;
final int bitmapCacheSize = (int) (cacheSizeAdjustment * BITMAP_CACHE_SIZE);
mBitmapCache = new LruCache<Object, Bitmap>(bitmapCacheSize) {
@Override protected int sizeOf(Object key, Bitmap value) {
return value.getByteCount();
}
@Override protected void entryRemoved(
boolean evicted, Object key, Bitmap oldValue, Bitmap newValue) {
if (DEBUG) dumpStats();
}
};
final int holderCacheSize = (int) (cacheSizeAdjustment * HOLDER_CACHE_SIZE);
mBitmapHolderCache = new LruCache<Object, BitmapHolder>(holderCacheSize) {
@Override protected int sizeOf(Object key, BitmapHolder value) {
return value.bytes != null ? value.bytes.length : 0;
}
@Override protected void entryRemoved(
boolean evicted, Object key, BitmapHolder oldValue, BitmapHolder newValue) {
if (DEBUG) dumpStats();
}
};
mBitmapHolderCacheRedZoneBytes = (int) (holderCacheSize * 0.75);
Log.i(TAG, "Cache adj: " + cacheSizeAdjustment);
if (DEBUG) {
Log.d(TAG, "Cache size: " + btk(mBitmapHolderCache.maxSize())
+ " + " + btk(mBitmapCache.maxSize()));
}
}
/** Converts bytes to K bytes, rounding up. Used only for debug log. */
private static String btk(int bytes) {
return ((bytes + 1023) / 1024) + "K";
}
private static final int safeDiv(int dividend, int divisor) {
return (divisor == 0) ? 0 : (dividend / divisor);
}
/**
* Dump cache stats on logcat.
*/
private void dumpStats() {
if (!DEBUG) return;
{
int numHolders = 0;
int rawBytes = 0;
int bitmapBytes = 0;
int numBitmaps = 0;
for (BitmapHolder h : mBitmapHolderCache.snapshot().values()) {
numHolders++;
if (h.bytes != null) {
rawBytes += h.bytes.length;
}
Bitmap b = h.bitmapRef != null ? h.bitmapRef.get() : null;
if (b != null) {
numBitmaps++;
bitmapBytes += b.getByteCount();
}
}
Log.d(TAG, "L1: " + btk(rawBytes) + " + " + btk(bitmapBytes) + " = "
+ btk(rawBytes + bitmapBytes) + ", " + numHolders + " holders, "
+ numBitmaps + " bitmaps, avg: "
+ btk(safeDiv(rawBytes, numHolders))
+ "," + btk(safeDiv(bitmapBytes,numBitmaps)));
Log.d(TAG, "L1 Stats: " + mBitmapHolderCache.toString()
+ ", overwrite: fresh=" + mFreshCacheOverwrite.get()
+ " stale=" + mStaleCacheOverwrite.get());
}
{
int numBitmaps = 0;
int bitmapBytes = 0;
for (Bitmap b : mBitmapCache.snapshot().values()) {
numBitmaps++;
bitmapBytes += b.getByteCount();
}
Log.d(TAG, "L2: " + btk(bitmapBytes) + ", " + numBitmaps + " bitmaps"
+ ", avg: " + btk(safeDiv(bitmapBytes, numBitmaps)));
// We don't get from L2 cache, so L2 stats is meaningless.
}
}
@Override
public void onTrimMemory(int level) {
if (DEBUG) Log.d(TAG, "onTrimMemory: " + level);
if (level >= ComponentCallbacks2.TRIM_MEMORY_MODERATE) {
// Clear the caches. Note all pending requests will be removed too.
clear();
}
}
@Override
public void preloadPhotosInBackground() {
ensureLoaderThread();
mLoaderThread.requestPreloading();
}
@Override
public void loadPhoto(ImageView view, long photoId, boolean hires, boolean darkTheme,
DefaultImageProvider defaultProvider) {
if (photoId == 0) {
// No photo is needed
defaultProvider.applyDefaultImage(view, hires, darkTheme);
mPendingRequests.remove(view);
} else {
if (DEBUG) Log.d(TAG, "loadPhoto request: " + photoId);
loadPhotoByIdOrUri(view, Request.createFromId(photoId, hires, darkTheme,
defaultProvider));
}
}
@Override
public void loadPhoto(ImageView view, Uri photoUri, boolean hires, boolean darkTheme,
DefaultImageProvider defaultProvider) {
if (photoUri == null) {
// No photo is needed
defaultProvider.applyDefaultImage(view, hires, darkTheme);
mPendingRequests.remove(view);
} else {
if (DEBUG) Log.d(TAG, "loadPhoto request: " + photoUri);
loadPhotoByIdOrUri(view, Request.createFromUri(photoUri, hires, darkTheme,
defaultProvider));
}
}
private void loadPhotoByIdOrUri(ImageView view, Request request) {
boolean loaded = loadCachedPhoto(view, request);
if (loaded) {
mPendingRequests.remove(view);
} else {
mPendingRequests.put(view, request);
if (!mPaused) {
// Send a request to start loading photos
requestLoading();
}
}
}
@Override
public void removePhoto(ImageView view) {
view.setImageDrawable(null);
mPendingRequests.remove(view);
}
@Override
public void refreshCache() {
if (DEBUG) Log.d(TAG, "refreshCache");
for (BitmapHolder holder : mBitmapHolderCache.snapshot().values()) {
holder.fresh = false;
}
}
/**
* Checks if the photo is present in cache. If so, sets the photo on the view.
*
* @return false if the photo needs to be (re)loaded from the provider.
*/
private boolean loadCachedPhoto(ImageView view, Request request) {
BitmapHolder holder = mBitmapHolderCache.get(request.getKey());
if (holder == null) {
// The bitmap has not been loaded - should display the placeholder image.
request.applyDefaultImage(view);
return false;
}
if (holder.bytes == null) {
request.applyDefaultImage(view);
return holder.fresh;
}
// Optionally decode bytes into a bitmap
inflateBitmap(holder);
view.setImageBitmap(holder.bitmap);
if (holder.bitmap != null) {
// Put the bitmap in the LRU cache
mBitmapCache.put(request, holder.bitmap);
}
// Soften the reference
holder.bitmap = null;
return holder.fresh;
}
/**
* If necessary, decodes bytes stored in the holder to Bitmap. As long as the
* bitmap is held either by {@link #mBitmapCache} or by a soft reference in
* the holder, it will not be necessary to decode the bitmap.
*/
private static void inflateBitmap(BitmapHolder holder) {
byte[] bytes = holder.bytes;
if (bytes == null || bytes.length == 0) {
return;
}
// Check the soft reference. If will be retained if the bitmap is also
// in the LRU cache, so we don't need to check the LRU cache explicitly.
if (holder.bitmapRef != null) {
holder.bitmap = holder.bitmapRef.get();
if (holder.bitmap != null) {
return;
}
}
try {
Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length, null);
holder.bitmap = bitmap;
holder.bitmapRef = new SoftReference<Bitmap>(bitmap);
if (DEBUG) {
Log.d(TAG, "inflateBitmap " + btk(bytes.length) + " -> "
+ bitmap.getWidth() + "x" + bitmap.getHeight()
+ ", " + btk(bitmap.getByteCount()));
}
} catch (OutOfMemoryError e) {
// Do nothing - the photo will appear to be missing
}
}
public void clear() {
if (DEBUG) Log.d(TAG, "clear");
mPendingRequests.clear();
mBitmapHolderCache.evictAll();
mBitmapCache.evictAll();
}
@Override
public void pause() {
mPaused = true;
}
@Override
public void resume() {
mPaused = false;
if (DEBUG) dumpStats();
if (!mPendingRequests.isEmpty()) {
requestLoading();
}
}
/**
* Sends a message to this thread itself to start loading images. If the current
* view contains multiple image views, all of those image views will get a chance
* to request their respective photos before any of those requests are executed.
* This allows us to load images in bulk.
*/
private void requestLoading() {
if (!mLoadingRequested) {
mLoadingRequested = true;
mMainThreadHandler.sendEmptyMessage(MESSAGE_REQUEST_LOADING);
}
}
/**
* Processes requests on the main thread.
*/
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_REQUEST_LOADING: {
mLoadingRequested = false;
if (!mPaused) {
ensureLoaderThread();
mLoaderThread.requestLoading();
}
return true;
}
case MESSAGE_PHOTOS_LOADED: {
if (!mPaused) {
processLoadedImages();
}
if (DEBUG) dumpStats();
return true;
}
}
return false;
}
public void ensureLoaderThread() {
if (mLoaderThread == null) {
mLoaderThread = new LoaderThread(mContext.getContentResolver());
mLoaderThread.start();
}
}
/**
* Goes over pending loading requests and displays loaded photos. If some of the
* photos still haven't been loaded, sends another request for image loading.
*/
private void processLoadedImages() {
Iterator<ImageView> iterator = mPendingRequests.keySet().iterator();
while (iterator.hasNext()) {
ImageView view = iterator.next();
Request key = mPendingRequests.get(view);
boolean loaded = loadCachedPhoto(view, key);
if (loaded) {
iterator.remove();
}
}
softenCache();
if (!mPendingRequests.isEmpty()) {
requestLoading();
}
}
/**
* Removes strong references to loaded bitmaps to allow them to be garbage collected
* if needed. Some of the bitmaps will still be retained by {@link #mBitmapCache}.
*/
private void softenCache() {
for (BitmapHolder holder : mBitmapHolderCache.snapshot().values()) {
holder.bitmap = null;
}
}
/**
* Stores the supplied bitmap in cache.
*/
private void cacheBitmap(Object key, byte[] bytes, boolean preloading) {
if (DEBUG) {
BitmapHolder prev = mBitmapHolderCache.get(key);
if (prev != null && prev.bytes != null) {
Log.d(TAG, "Overwriting cache: key=" + key + (prev.fresh ? " FRESH" : " stale"));
if (prev.fresh) {
mFreshCacheOverwrite.incrementAndGet();
} else {
mStaleCacheOverwrite.incrementAndGet();
}
}
Log.d(TAG, "Caching data: key=" + key + ", " + btk(bytes.length));
}
BitmapHolder holder = new BitmapHolder(bytes);
holder.fresh = true;
// Unless this image is being preloaded, decode it right away while
// we are still on the background thread.
if (!preloading) {
inflateBitmap(holder);
}
mBitmapHolderCache.put(key, holder);
}
/**
* Populates an array of photo IDs that need to be loaded.
*/
private void obtainPhotoIdsAndUrisToLoad(Set<Long> photoIds,
Set<String> photoIdsAsStrings, Set<Uri> uris) {
photoIds.clear();
photoIdsAsStrings.clear();
uris.clear();
/*
* Since the call is made from the loader thread, the map could be
* changing during the iteration. That's not really a problem:
* ConcurrentHashMap will allow those changes to happen without throwing
* exceptions. Since we may miss some requests in the situation of
* concurrent change, we will need to check the map again once loading
* is complete.
*/
Iterator<Request> iterator = mPendingRequests.values().iterator();
while (iterator.hasNext()) {
Request request = iterator.next();
BitmapHolder holder = mBitmapHolderCache.get(request);
if (holder == null || !holder.fresh) {
if (request.isUriRequest()) {
uris.add(request.mUri);
} else {
photoIds.add(request.mId);
photoIdsAsStrings.add(String.valueOf(request.mId));
}
}
}
}
/**
* The thread that performs loading of photos from the database.
*/
private class LoaderThread extends HandlerThread implements Callback {
private static final int BUFFER_SIZE = 1024*16;
private static final int MESSAGE_PRELOAD_PHOTOS = 0;
private static final int MESSAGE_LOAD_PHOTOS = 1;
/**
* A pause between preload batches that yields to the UI thread.
*/
private static final int PHOTO_PRELOAD_DELAY = 1000;
/**
* Number of photos to preload per batch.
*/
private static final int PRELOAD_BATCH = 25;
/**
* Maximum number of photos to preload. If the cache size is 2Mb and
* the expected average size of a photo is 4kb, then this number should be 2Mb/4kb = 500.
*/
private static final int MAX_PHOTOS_TO_PRELOAD = 100;
private final ContentResolver mResolver;
private final StringBuilder mStringBuilder = new StringBuilder();
private final Set<Long> mPhotoIds = Sets.newHashSet();
private final Set<String> mPhotoIdsAsStrings = Sets.newHashSet();
private final Set<Uri> mPhotoUris = Sets.newHashSet();
private final List<Long> mPreloadPhotoIds = Lists.newArrayList();
private Handler mLoaderThreadHandler;
private byte mBuffer[];
private static final int PRELOAD_STATUS_NOT_STARTED = 0;
private static final int PRELOAD_STATUS_IN_PROGRESS = 1;
private static final int PRELOAD_STATUS_DONE = 2;
private int mPreloadStatus = PRELOAD_STATUS_NOT_STARTED;
public LoaderThread(ContentResolver resolver) {
super(LOADER_THREAD_NAME);
mResolver = resolver;
}
public void ensureHandler() {
if (mLoaderThreadHandler == null) {
mLoaderThreadHandler = new Handler(getLooper(), this);
}
}
/**
* Kicks off preloading of the next batch of photos on the background thread.
* Preloading will happen after a delay: we want to yield to the UI thread
* as much as possible.
* <p>
* If preloading is already complete, does nothing.
*/
public void requestPreloading() {
if (mPreloadStatus == PRELOAD_STATUS_DONE) {
return;
}
ensureHandler();
if (mLoaderThreadHandler.hasMessages(MESSAGE_LOAD_PHOTOS)) {
return;
}
mLoaderThreadHandler.sendEmptyMessageDelayed(
MESSAGE_PRELOAD_PHOTOS, PHOTO_PRELOAD_DELAY);
}
/**
* Sends a message to this thread to load requested photos. Cancels a preloading
* request, if any: we don't want preloading to impede loading of the photos
* we need to display now.
*/
public void requestLoading() {
ensureHandler();
mLoaderThreadHandler.removeMessages(MESSAGE_PRELOAD_PHOTOS);
mLoaderThreadHandler.sendEmptyMessage(MESSAGE_LOAD_PHOTOS);
}
/**
* Receives the above message, loads photos and then sends a message
* to the main thread to process them.
*/
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_PRELOAD_PHOTOS:
preloadPhotosInBackground();
break;
case MESSAGE_LOAD_PHOTOS:
loadPhotosInBackground();
break;
}
return true;
}
/**
* The first time it is called, figures out which photos need to be preloaded.
* Each subsequent call preloads the next batch of photos and requests
* another cycle of preloading after a delay. The whole process ends when
* we either run out of photos to preload or fill up cache.
*/
private void preloadPhotosInBackground() {
if (mPreloadStatus == PRELOAD_STATUS_DONE) {
return;
}
if (mPreloadStatus == PRELOAD_STATUS_NOT_STARTED) {
queryPhotosForPreload();
if (mPreloadPhotoIds.isEmpty()) {
mPreloadStatus = PRELOAD_STATUS_DONE;
} else {
mPreloadStatus = PRELOAD_STATUS_IN_PROGRESS;
}
requestPreloading();
return;
}
if (mBitmapHolderCache.size() > mBitmapHolderCacheRedZoneBytes) {
mPreloadStatus = PRELOAD_STATUS_DONE;
return;
}
mPhotoIds.clear();
mPhotoIdsAsStrings.clear();
int count = 0;
int preloadSize = mPreloadPhotoIds.size();
while(preloadSize > 0 && mPhotoIds.size() < PRELOAD_BATCH) {
preloadSize--;
count++;
Long photoId = mPreloadPhotoIds.get(preloadSize);
mPhotoIds.add(photoId);
mPhotoIdsAsStrings.add(photoId.toString());
mPreloadPhotoIds.remove(preloadSize);
}
loadPhotosFromDatabase(true);
if (preloadSize == 0) {
mPreloadStatus = PRELOAD_STATUS_DONE;
}
Log.v(TAG, "Preloaded " + count + " photos. Cached bytes: "
+ mBitmapHolderCache.size());
requestPreloading();
}
private void queryPhotosForPreload() {
Cursor cursor = null;
try {
Uri uri = Contacts.CONTENT_URI.buildUpon().appendQueryParameter(
ContactsContract.DIRECTORY_PARAM_KEY, String.valueOf(Directory.DEFAULT))
.appendQueryParameter(ContactsContract.LIMIT_PARAM_KEY,
String.valueOf(MAX_PHOTOS_TO_PRELOAD))
.build();
cursor = mResolver.query(uri, new String[] { Contacts.PHOTO_ID },
Contacts.PHOTO_ID + " NOT NULL AND " + Contacts.PHOTO_ID + "!=0",
null,
Contacts.STARRED + " DESC, " + Contacts.LAST_TIME_CONTACTED + " DESC");
if (cursor != null) {
while (cursor.moveToNext()) {
// Insert them in reverse order, because we will be taking
// them from the end of the list for loading.
mPreloadPhotoIds.add(0, cursor.getLong(0));
}
}
} finally {
if (cursor != null) {
cursor.close();
}
}
}
private void loadPhotosInBackground() {
obtainPhotoIdsAndUrisToLoad(mPhotoIds, mPhotoIdsAsStrings, mPhotoUris);
loadPhotosFromDatabase(false);
loadRemotePhotos();
requestPreloading();
}
private void loadPhotosFromDatabase(boolean preloading) {
if (mPhotoIds.isEmpty()) {
return;
}
// Remove loaded photos from the preload queue: we don't want
// the preloading process to load them again.
if (!preloading && mPreloadStatus == PRELOAD_STATUS_IN_PROGRESS) {
for (Long id : mPhotoIds) {
mPreloadPhotoIds.remove(id);
}
if (mPreloadPhotoIds.isEmpty()) {
mPreloadStatus = PRELOAD_STATUS_DONE;
}
}
mStringBuilder.setLength(0);
mStringBuilder.append(Photo._ID + " IN(");
for (int i = 0; i < mPhotoIds.size(); i++) {
if (i != 0) {
mStringBuilder.append(',');
}
mStringBuilder.append('?');
}
mStringBuilder.append(')');
Cursor cursor = null;
try {
if (DEBUG) Log.d(TAG, "Loading " + TextUtils.join(",", mPhotoIdsAsStrings));
cursor = mResolver.query(Data.CONTENT_URI,
COLUMNS,
mStringBuilder.toString(),
mPhotoIdsAsStrings.toArray(EMPTY_STRING_ARRAY),
null);
if (cursor != null) {
while (cursor.moveToNext()) {
Long id = cursor.getLong(0);
byte[] bytes = cursor.getBlob(1);
cacheBitmap(id, bytes, preloading);
mPhotoIds.remove(id);
}
}
} finally {
if (cursor != null) {
cursor.close();
}
}
// Remaining photos were not found in the contacts database (but might be in profile).
for (Long id : mPhotoIds) {
if (ContactsContract.isProfileId(id)) {
Cursor profileCursor = null;
try {
profileCursor = mResolver.query(
ContentUris.withAppendedId(Data.CONTENT_URI, id),
COLUMNS, null, null, null);
if (profileCursor != null && profileCursor.moveToFirst()) {
cacheBitmap(profileCursor.getLong(0), profileCursor.getBlob(1),
preloading);
} else {
// Couldn't load a photo this way either.
cacheBitmap(id, null, preloading);
}
} finally {
if (profileCursor != null) {
profileCursor.close();
}
}
} else {
// Not a profile photo and not found - mark the cache accordingly
cacheBitmap(id, null, preloading);
}
}
mMainThreadHandler.sendEmptyMessage(MESSAGE_PHOTOS_LOADED);
}
private void loadRemotePhotos() {
for (Uri uri : mPhotoUris) {
if (mBuffer == null) {
mBuffer = new byte[BUFFER_SIZE];
}
try {
if (DEBUG) Log.d(TAG, "Loading " + uri);
InputStream is = mResolver.openInputStream(uri);
if (is != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
int size;
while ((size = is.read(mBuffer)) != -1) {
baos.write(mBuffer, 0, size);
}
} finally {
is.close();
}
cacheBitmap(uri, baos.toByteArray(), false);
mMainThreadHandler.sendEmptyMessage(MESSAGE_PHOTOS_LOADED);
} else {
Log.v(TAG, "Cannot load photo " + uri);
cacheBitmap(uri, null, false);
}
} catch (Exception ex) {
Log.v(TAG, "Cannot load photo " + uri, ex);
cacheBitmap(uri, null, false);
}
}
}
}
/**
* A holder for either a Uri or an id and a flag whether this was requested for the dark or
* light theme
*/
private static final class Request {
private final long mId;
private final Uri mUri;
private final boolean mDarkTheme;
private final boolean mHires;
private final DefaultImageProvider mDefaultProvider;
private Request(long id, Uri uri, boolean hires, boolean darkTheme,
DefaultImageProvider defaultProvider) {
mId = id;
mUri = uri;
mDarkTheme = darkTheme;
mHires = hires;
mDefaultProvider = defaultProvider;
}
public static Request createFromId(long id, boolean hires, boolean darkTheme,
DefaultImageProvider defaultProvider) {
return new Request(id, null /* no URI */, hires, darkTheme, defaultProvider);
}
public static Request createFromUri(Uri uri, boolean hires, boolean darkTheme,
DefaultImageProvider defaultProvider) {
return new Request(0 /* no ID */, uri, hires, darkTheme, defaultProvider);
}
public boolean isDarkTheme() {
return mDarkTheme;
}
public boolean isHires() {
return mHires;
}
public boolean isUriRequest() {
return mUri != null;
}
@Override
public int hashCode() {
if (mUri != null) return mUri.hashCode();
// copied over from Long.hashCode()
return (int) (mId ^ (mId >>> 32));
}
@Override
public boolean equals(Object o) {
if (!(o instanceof Request)) return false;
final Request that = (Request) o;
// Don't compare equality of mHires and mDarkTheme fields because these are only used
// in the default contact photo case. When the contact does have a photo, the contact
// photo is the same regardless of mHires and mDarkTheme, so we shouldn't need to put
// the photo request on the queue twice.
return mId == that.mId && UriUtils.areEqual(mUri, that.mUri);
}
public Object getKey() {
return mUri == null ? mId : mUri;
}
public void applyDefaultImage(ImageView view) {
mDefaultProvider.applyDefaultImage(view, mHires, mDarkTheme);
}
}
}