Java tutorial
/* * 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.silentcircle.contacts; import android.annotation.TargetApi; import android.app.ActivityManager; import android.content.ComponentCallbacks2; import android.content.ContentResolver; import android.content.Context; import android.content.res.Configuration; import android.content.res.Resources; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.Style; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; import android.graphics.drawable.TransitionDrawable; import android.media.ThumbnailUtils; import android.net.Uri; import android.net.Uri.Builder; import android.os.Build; 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.support.annotation.NonNull; import android.support.v4.graphics.drawable.RoundedBitmapDrawable; import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory; import android.text.TextUtils; import android.util.Log; import android.util.LruCache; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import com.google.common.collect.Lists; import com.google.common.collect.Sets; import com.silentcircle.contacts.utils.BitmapUtil; import com.silentcircle.contacts.utils.UriUtils; import com.silentcircle.contacts.widget.LetterTileDrawable; import com.silentcircle.silentphone2.R; import java.io.ByteArrayOutputStream; import java.io.InputStream; import java.lang.ref.Reference; import java.lang.ref.SoftReference; import java.net.URL; import java.util.Iterator; import java.util.List; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.atomic.AtomicInteger; import javax.net.ssl.HttpsURLConnection; /** * Asynchronously loads contact photos and maintains a cache of photos. */ public abstract class ContactPhotoManagerNew implements ComponentCallbacks2 { static final String TAG = "ContactPhotoManagerNew"; static final boolean DEBUG = false; // Don't submit with true static final boolean DEBUG_SIZES = false; // Don't submit with true /** Contact type constants used for default letter images */ public static final int TYPE_PERSON = LetterTileDrawable.TYPE_PERSON; public static final int TYPE_BUSINESS = LetterTileDrawable.TYPE_BUSINESS; public static final int TYPE_VOICEMAIL = LetterTileDrawable.TYPE_VOICEMAIL; public static final int TYPE_DEFAULT = LetterTileDrawable.TYPE_DEFAULT; /** Scale and offset default constants used for default letter images */ public static final float SCALE_DEFAULT = 1.0f; public static final float OFFSET_DEFAULT = 0.0f; public static final boolean IS_CIRCULAR_DEFAULT = false; /** Uri-related constants used for default letter images */ private static final String DISPLAY_NAME_PARAM_KEY = "display_name"; private static final String IDENTIFIER_PARAM_KEY = "identifier"; private static final String CONTACT_TYPE_PARAM_KEY = "contact_type"; private static final String SCALE_PARAM_KEY = "scale"; private static final String OFFSET_PARAM_KEY = "offset"; private static final String IS_CIRCULAR_PARAM_KEY = "is_circular"; private static final String DEFAULT_IMAGE_URI_SCHEME = "defaultimage"; private static final Uri DEFAULT_IMAGE_URI = Uri.parse(DEFAULT_IMAGE_URI_SCHEME + "://"); public static final String CONTACT_PHOTO_SERVICE = "contactPhotos"; // Static field used to cache the default letter avatar drawable that is created // using a null {@link DefaultImageRequest} private static Drawable sDefaultLetterAvatar = null; /** * Given a {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest}, returns a {@link android.graphics.drawable.Drawable}, that when drawn, will * draw a letter tile avatar based on the request parameters defined in the * {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest}. */ public static Drawable getDefaultAvatarDrawableForContact(Resources resources, boolean hires, DefaultImageRequest defaultImageRequest) { if (defaultImageRequest == null) { if (sDefaultLetterAvatar == null) { // Cache and return the letter tile drawable that is created by a null request, // so that it doesn't have to be recreated every time it is requested again. sDefaultLetterAvatar = LetterTileDefaultImageProvider.getDefaultImageForContact(resources, null); } return sDefaultLetterAvatar; } return LetterTileDefaultImageProvider.getDefaultImageForContact(resources, defaultImageRequest); } /** * Given a {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest}, returns an Uri that can be used to request a * letter tile avatar when passed to the {@link com.silentcircle.contacts.ContactPhotoManager}. The internal * implementation of this uri is not guaranteed to remain the same across application * versions, so the actual uri should never be persisted in long-term storage and reused. * * @param request A {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest} object with the fields configured * to return a * @return A Uri that when later passed to the {@link com.silentcircle.contacts.ContactPhotoManager} via * {@link #loadPhoto(android.widget.ImageView, android.net.Uri, int, boolean, com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest)}, can be * used to request a default contact image, drawn as a letter tile using the * parameters as configured in the provided {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest} */ public static Uri getDefaultAvatarUriForContact(DefaultImageRequest request) { final Builder builder = DEFAULT_IMAGE_URI.buildUpon(); if (request != null) { if (!TextUtils.isEmpty(request.displayName)) { builder.appendQueryParameter(DISPLAY_NAME_PARAM_KEY, request.displayName); } if (!TextUtils.isEmpty(request.identifier)) { builder.appendQueryParameter(IDENTIFIER_PARAM_KEY, request.identifier); } if (request.contactType != TYPE_DEFAULT) { builder.appendQueryParameter(CONTACT_TYPE_PARAM_KEY, String.valueOf(request.contactType)); } if (request.scale != SCALE_DEFAULT) { builder.appendQueryParameter(SCALE_PARAM_KEY, String.valueOf(request.scale)); } if (request.offset != OFFSET_DEFAULT) { builder.appendQueryParameter(OFFSET_PARAM_KEY, String.valueOf(request.offset)); } if (request.isCircular != IS_CIRCULAR_DEFAULT) { builder.appendQueryParameter(IS_CIRCULAR_PARAM_KEY, String.valueOf(request.isCircular)); } } return builder.build(); } /** * Adds a business contact type encoded fragment to the URL. Used to ensure photo URLS * from Nearby Places can be identified as business photo URLs rather than URLs for personal * contact photos. * * @param photoUrl The photo URL to modify. * @return URL with the contact type parameter added and set to TYPE_BUSINESS. */ public static String appendBusinessContactType(String photoUrl) { Uri uri = Uri.parse(photoUrl); Builder builder = uri.buildUpon(); builder.encodedFragment(String.valueOf(TYPE_BUSINESS)); return builder.build().toString(); } /** * Removes the contact type information stored in the photo URI encoded fragment. * * @param photoUri The photo URI to remove the contact type from. * @return The photo URI with contact type removed. */ public static Uri removeContactType(Uri photoUri) { String encodedFragment = photoUri.getEncodedFragment(); if (!TextUtils.isEmpty(encodedFragment)) { Builder builder = photoUri.buildUpon(); builder.encodedFragment(null); return builder.build(); } return photoUri; } /** * Inspects a photo URI to determine if the photo URI represents a business. * * @param photoUri The URI to inspect. * @return Whether the URI represents a business photo or not. */ public static boolean isBusinessContactUri(Uri photoUri) { if (photoUri == null) { return false; } String encodedFragment = photoUri.getEncodedFragment(); return !TextUtils.isEmpty(encodedFragment) && encodedFragment.equals(String.valueOf(TYPE_BUSINESS)); } protected static DefaultImageRequest getDefaultImageRequestFromUri(Uri uri) { final DefaultImageRequest request = new DefaultImageRequest(uri.getQueryParameter(DISPLAY_NAME_PARAM_KEY), uri.getQueryParameter(IDENTIFIER_PARAM_KEY), false); try { String contactType = uri.getQueryParameter(CONTACT_TYPE_PARAM_KEY); if (!TextUtils.isEmpty(contactType)) { request.contactType = Integer.valueOf(contactType); } String scale = uri.getQueryParameter(SCALE_PARAM_KEY); if (!TextUtils.isEmpty(scale)) { request.scale = Float.valueOf(scale); } String offset = uri.getQueryParameter(OFFSET_PARAM_KEY); if (!TextUtils.isEmpty(offset)) { request.offset = Float.valueOf(offset); } String isCircular = uri.getQueryParameter(IS_CIRCULAR_PARAM_KEY); if (!TextUtils.isEmpty(isCircular)) { request.isCircular = Boolean.valueOf(isCircular); } } catch (NumberFormatException e) { Log.w(TAG, "Invalid DefaultImageRequest image parameters provided, ignoring and using " + "defaults."); } return request; } protected boolean isDefaultImageUri(Uri uri) { return DEFAULT_IMAGE_URI_SCHEME.equals(uri.getScheme()); } /** * Contains fields used to contain contact details and other user-defined settings that might * be used by the ContactPhotoManager to generate a default contact image. This contact image * takes the form of a letter or bitmap drawn on top of a colored tile. */ public static class DefaultImageRequest { /** * The contact's display name. The display name is used to */ public String displayName; /** * A unique and deterministic string that can be used to identify this contact. This is * usually the contact's lookup key, but other contact details can be used as well, * especially for non-local or temporary contacts that might not have a lookup key. This * is used to determine the color of the tile. */ public String identifier; /** * The type of this contact. This contact type may be used to decide the kind of * image to use in the case where a unique letter cannot be generated from the contact's * display name and identifier. See: * {@link #TYPE_PERSON} * {@link #TYPE_BUSINESS} * {@link #TYPE_PERSON} * {@link #TYPE_DEFAULT} */ public int contactType = TYPE_DEFAULT; /** * The amount to scale the letter or bitmap to, as a ratio of its default size (from a * range of 0.0f to 2.0f). The default value is 1.0f. */ public float scale = SCALE_DEFAULT; /** * The amount to vertically offset the letter or image to within the tile. * The provided offset must be within the range of -0.5f to 0.5f. * If set to -0.5f, the letter will be shifted upwards by 0.5 times the height of the canvas * it is being drawn on, which means it will be drawn with the center of the letter starting * at the top edge of the canvas. * If set to 0.5f, the letter will be shifted downwards by 0.5 times the height of the * canvas it is being drawn on, which means it will be drawn with the center of the letter * starting at the bottom edge of the canvas. * The default is 0.0f, which means the letter is drawn in the exact vertical center of * the tile. */ public float offset = OFFSET_DEFAULT; /** * Whether or not to draw the default image as a circle, instead of as a square/rectangle. */ public boolean isCircular = false; /** * Used to indicate that a drawable that represents a contact without any contact details * should be returned. */ public static DefaultImageRequest EMPTY_DEFAULT_IMAGE_REQUEST = new DefaultImageRequest(); /** * Used to indicate that a drawable that represents a business without a business photo * should be returned. */ public static DefaultImageRequest EMPTY_DEFAULT_BUSINESS_IMAGE_REQUEST = new DefaultImageRequest(null, null, TYPE_BUSINESS, false); /** * Used to indicate that a circular drawable that represents a contact without any contact * details should be returned. */ public static DefaultImageRequest EMPTY_CIRCULAR_DEFAULT_IMAGE_REQUEST = new DefaultImageRequest(null, null, true); /** * Used to indicate that a circular drawable that represents a business without a business * photo should be returned. */ public static DefaultImageRequest EMPTY_CIRCULAR_BUSINESS_IMAGE_REQUEST = new DefaultImageRequest(null, null, TYPE_BUSINESS, true); public DefaultImageRequest() { } public DefaultImageRequest(String displayName, String identifier, boolean isCircular) { this(displayName, identifier, TYPE_DEFAULT, SCALE_DEFAULT, OFFSET_DEFAULT, isCircular); } public DefaultImageRequest(String displayName, String identifier, int contactType, boolean isCircular) { this(displayName, identifier, contactType, SCALE_DEFAULT, OFFSET_DEFAULT, isCircular); } public DefaultImageRequest(String displayName, String identifier, int contactType, float scale, float offset, boolean isCircular) { this.displayName = displayName; this.identifier = identifier; this.contactType = contactType; this.scale = scale; this.offset = offset; this.isCircular = isCircular; } } public static abstract class DefaultImageProvider { /** * Applies the default avatar to the ImageView. Extent is an indicator for the size (width * or height). If darkTheme is set, the avatar is one that looks better on dark background * * @param defaultImageRequest {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest} object that specifies how a * default letter tile avatar should be drawn. */ public abstract void applyDefaultImage(ImageView view, int extent, boolean darkTheme, DefaultImageRequest defaultImageRequest); } /** * A default image provider that applies a letter tile consisting of a colored background * and a letter in the foreground as the default image for a contact. The color of the * background and the type of letter is decided based on the contact's details. */ private static class LetterTileDefaultImageProvider extends DefaultImageProvider { @Override public void applyDefaultImage(ImageView view, int extent, boolean darkTheme, DefaultImageRequest defaultImageRequest) { final Drawable drawable = getDefaultImageForContact(view.getResources(), defaultImageRequest); view.setImageDrawable(drawable); } public static Drawable getDefaultImageForContact(Resources resources, DefaultImageRequest defaultImageRequest) { final LetterTileDrawable drawable = new LetterTileDrawable(resources); if (defaultImageRequest != null) { // If the contact identifier is null or empty, fallback to the // displayName. In that case, use {@code null} for the contact's // display name so that a default bitmap will be used instead of a // letter if (TextUtils.isEmpty(defaultImageRequest.identifier)) { drawable.setContactDetails(null, defaultImageRequest.displayName); // NOTE: check order of parameters } else { drawable.setContactDetails(defaultImageRequest.displayName, defaultImageRequest.identifier); } drawable.setContactType(defaultImageRequest.contactType); drawable.setScale(defaultImageRequest.scale); drawable.setOffset(defaultImageRequest.offset); drawable.setIsCircular(defaultImageRequest.isCircular); } return drawable; } } private static class BlankDefaultImageProvider extends DefaultImageProvider { private static Drawable sDrawable; @Override public void applyDefaultImage(ImageView view, int extent, boolean darkTheme, DefaultImageRequest defaultImageRequest) { if (sDrawable == null) { Context context = view.getContext(); sDrawable = new ColorDrawable(context.getResources().getColor(R.color.image_placeholder)); } view.setImageDrawable(sDrawable); } } public static DefaultImageProvider DEFAULT_AVATAR = new LetterTileDefaultImageProvider(); public static final DefaultImageProvider DEFAULT_BLANK = new BlankDefaultImageProvider(); private static ContactPhotoManagerNew service; public static ContactPhotoManagerNew getInstance(Context context) { if (service == null) { service = createContactPhotoManager(context.getApplicationContext()); } return service; } public static synchronized ContactPhotoManagerNew createContactPhotoManager(Context context) { return new ContactPhotoManagerImplNew(context); } /** * Load thumbnail image 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 loadThumbnail(ImageView view, long photoId, boolean darkTheme, boolean isCircular, DefaultImageRequest defaultImageRequest, DefaultImageProvider defaultProvider); /** * Calls {@link #loadThumbnail(android.widget.ImageView, long, boolean, com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest, * com.silentcircle.contacts.ContactPhotoManager.DefaultImageProvider)} using the * {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageProvider} {@link #DEFAULT_AVATAR}. */ public final void loadThumbnail(ImageView view, long photoId, boolean darkTheme, boolean isCircular, DefaultImageRequest defaultImageRequest) { loadThumbnail(view, photoId, darkTheme, isCircular, defaultImageRequest, DEFAULT_AVATAR); } /** * 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. * * @param view The target view * @param photoUri The uri of the photo to load * @param requestedExtent Specifies an approximate Max(width, height) of the targetView. * This is useful if the source image can be a lot bigger that the target, so that the decoding * is done using efficient sampling. If requestedExtent is specified, no sampling of the image * is performed * @param darkTheme Whether the background is dark. This is used for default avatars * @param defaultImageRequest {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest} object that specifies how a default * letter tile avatar should be drawn. * @param defaultProvider The provider of default avatars (this is used if photoUri doesn't * refer to an existing image) */ public abstract void loadPhoto(ImageView view, Uri photoUri, int requestedExtent, boolean darkTheme, boolean isCircular, DefaultImageRequest defaultImageRequest, DefaultImageProvider defaultProvider); /** * Calls {@link #loadPhoto(android.widget.ImageView, android.net.Uri, int, boolean, com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest, * com.silentcircle.contacts.ContactPhotoManager.DefaultImageProvider)} with {@link #DEFAULT_AVATAR} and {@code null} display names and * lookup keys. * * @param defaultImageRequest {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest} object that specifies how a default * letter tile avatar should be drawn. */ public final void loadPhoto(ImageView view, Uri photoUri, int requestedExtent, boolean darkTheme, boolean isCircular, DefaultImageRequest defaultImageRequest) { loadPhoto(view, photoUri, requestedExtent, darkTheme, isCircular, defaultImageRequest, DEFAULT_AVATAR); } /** * Calls {@link #loadPhoto(android.widget.ImageView, android.net.Uri, boolean, boolean, com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest, * com.silentcircle.contacts.ContactPhotoManager.DefaultImageProvider)} with {@link #DEFAULT_AVATAR} and with the assumption, that * the image is a thumbnail. * * @param defaultImageRequest {@link com.silentcircle.contacts.ContactPhotoManager.DefaultImageRequest} object that specifies how a default * letter tile avatar should be drawn. */ public final void loadDirectoryPhoto(ImageView view, Uri photoUri, boolean darkTheme, boolean isCircular, DefaultImageRequest defaultImageRequest) { loadPhoto(view, photoUri, -1, darkTheme, isCircular, defaultImageRequest, DEFAULT_AVATAR); } /** * Remove photo from the supplied image view. This also cancels current pending load request * inside this photo manager. */ public abstract void removePhoto(ImageView view); /** * Cancels all pending requests to load photos asynchronously. */ public abstract void cancelPendingRequests(View fragmentRootView); /** * 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(); /** * Stores the given bitmap directly in the LRU bitmap cache. * @param photoUri The URI of the photo (for future requests). * @param bitmap The bitmap. * @param photoBytes The bytes that were parsed to create the bitmap. */ public abstract void cacheBitmap(Uri photoUri, Bitmap bitmap, byte[] photoBytes); /** * 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 ContactPhotoManagerImplNew extends ContactPhotoManagerNew implements Callback { private static final String LOADER_THREAD_NAME = "ContactPhotoLoader"; private static final int FADE_TRANSITION_DURATION = 200; /** * 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; final int originalSmallerExtent; volatile boolean fresh; Bitmap bitmap; Reference<Bitmap> bitmapRef; int decodedSampleSize; public BitmapHolder(byte[] bytes, int originalSmallerExtent) { this.bytes = bytes; this.fresh = true; this.originalSmallerExtent = originalSmallerExtent; } } 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; /** * {@code true} if ALL entries in {@link #mBitmapHolderCache} are NOT fresh. */ private volatile boolean mBitmapHolderCacheAllUnfresh = true; /** * 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 /** Height/width of a thumbnail image */ private static int mThumbnailSize; /** 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(); @TargetApi(Build.VERSION_CODES.KITKAT) public ContactPhotoManagerImplNew(Context context) { mContext = context; final ActivityManager am = ((ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE)); final float cacheSizeAdjustment = (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) ? (am.isLowRamDevice() ? 0.5f : 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); if (DEBUG) { Log.i(TAG, "Cache adj: " + cacheSizeAdjustment); Log.d(TAG, "Cache size: " + btk(mBitmapHolderCache.maxSize()) + " + " + btk(mBitmapCache.maxSize())); } mThumbnailSize = context.getResources().getDimensionPixelSize(R.dimen.contact_browser_list_item_photo_size); } /** 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 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 loadThumbnail(ImageView view, long photoId, boolean darkTheme, boolean isCircular, DefaultImageRequest defaultImageRequest, DefaultImageProvider defaultProvider) { if (photoId == 0) { // No photo is needed defaultProvider.applyDefaultImage(view, -1, darkTheme, defaultImageRequest); mPendingRequests.remove(view); } else { if (DEBUG) Log.d(TAG, "loadPhoto request: " + photoId); loadPhotoByIdOrUri(view, Request.createFromThumbnailId(photoId, darkTheme, isCircular, defaultProvider)); } } @Override public void loadPhoto(ImageView view, Uri photoUri, int requestedExtent, boolean darkTheme, boolean isCircular, DefaultImageRequest defaultImageRequest, DefaultImageProvider defaultProvider) { if (photoUri == null) { // No photo is needed defaultProvider.applyDefaultImage(view, requestedExtent, darkTheme, defaultImageRequest); mPendingRequests.remove(view); } else { if (DEBUG) Log.d(TAG, "loadPhoto request: " + photoUri); if (isDefaultImageUri(photoUri)) { createAndApplyDefaultImageForUri(view, photoUri, requestedExtent, darkTheme, isCircular, defaultProvider); } else { loadPhotoByIdOrUri(view, Request.createFromUri(photoUri, requestedExtent, darkTheme, isCircular, defaultProvider)); } } } private void createAndApplyDefaultImageForUri(ImageView view, Uri uri, int requestedExtent, boolean darkTheme, boolean isCircular, DefaultImageProvider defaultProvider) { DefaultImageRequest request = getDefaultImageRequestFromUri(uri); request.isCircular = isCircular; defaultProvider.applyDefaultImage(view, requestedExtent, darkTheme, request); } private void loadPhotoByIdOrUri(ImageView view, Request request) { boolean loaded = loadCachedPhoto(view, request, false); 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); } /** * Cancels pending requests to load photos asynchronously for views inside * {@param fragmentRootView}. If {@param fragmentRootView} is null, cancels all requests. */ @Override public void cancelPendingRequests(View fragmentRootView) { if (fragmentRootView == null) { mPendingRequests.clear(); return; } ImageView[] requestSetCopy = mPendingRequests.keySet().toArray(new ImageView[mPendingRequests.size()]); for (ImageView imageView : requestSetCopy) { // If an ImageView is orphaned (currently scrap) or a child of fragmentRootView, then // we can safely remove its request. if (imageView.getParent() == null || isChildView(fragmentRootView, imageView)) { mPendingRequests.remove(imageView); } } } private static boolean isChildView(View parent, View potentialChild) { return potentialChild.getParent() != null && (potentialChild.getParent() == parent || (potentialChild.getParent() instanceof ViewGroup && isChildView(parent, (ViewGroup) potentialChild.getParent()))); } @Override public void refreshCache() { if (mBitmapHolderCacheAllUnfresh) { if (DEBUG) Log.d(TAG, "refreshCache -- no fresh entries."); return; } if (DEBUG) Log.d(TAG, "refreshCache"); mBitmapHolderCacheAllUnfresh = true; 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, boolean fadeIn) { BitmapHolder holder = mBitmapHolderCache.get(request.getKey()); if (holder == null) { // The bitmap has not been loaded ==> show default avatar request.applyDefaultImage(view, request.mIsCircular); return false; } if (holder.bytes == null) { request.applyDefaultImage(view, request.mIsCircular); return holder.fresh; } Bitmap cachedBitmap = holder.bitmapRef == null ? null : holder.bitmapRef.get(); if (cachedBitmap == null) { if (holder.bytes.length < 8 * 1024) { // Small thumbnails are usually quick to inflate. Let's do that on the UI thread inflateBitmap(holder, request.getRequestedExtent()); cachedBitmap = holder.bitmap; if (cachedBitmap == null) return false; } else { // This is bigger data. Let's send that back to the Loader so that we can // inflate this in the background request.applyDefaultImage(view, request.mIsCircular); return false; } } final Drawable previousDrawable = view.getDrawable(); if (fadeIn && previousDrawable != null) { final Drawable[] layers = new Drawable[2]; // Prevent cascade of TransitionDrawables. if (previousDrawable instanceof TransitionDrawable) { final TransitionDrawable previousTransitionDrawable = (TransitionDrawable) previousDrawable; layers[0] = previousTransitionDrawable .getDrawable(previousTransitionDrawable.getNumberOfLayers() - 1); } else { layers[0] = previousDrawable; } layers[1] = getDrawableForBitmap(mContext.getResources(), cachedBitmap, request); TransitionDrawable drawable = new TransitionDrawable(layers); view.setImageDrawable(drawable); drawable.startTransition(FADE_TRANSITION_DURATION); } else { view.setImageDrawable(getDrawableForBitmap(mContext.getResources(), cachedBitmap, request)); } // Put the bitmap in the LRU cache. But only do this for images that are small enough // (we require that at least six of those can be cached at the same time) if (cachedBitmap.getByteCount() < mBitmapCache.maxSize() / 6) { mBitmapCache.put(request.getKey(), cachedBitmap); } // hack: Don't allow resources from external requests to expire easily Uri uri = request.getUri(); if (uri != null) { final String scheme = uri.getScheme(); if (scheme.equals("http") || scheme.equals("https")) { holder.fresh = true; } } // Soften the reference holder.bitmap = null; return holder.fresh; } /** * Given a bitmap, returns a drawable that is configured to display the bitmap based on the * specified request. */ private Drawable getDrawableForBitmap(Resources resources, Bitmap bitmap, Request request) { if (request.mIsCircular) { final RoundedBitmapDrawable drawable = RoundedBitmapDrawableFactory.create(resources, bitmap); drawable.setAntiAlias(true); drawable.setCornerRadius(bitmap.getHeight() / 2); return drawable; } else { return new BitmapDrawable(resources, bitmap); } } /** * 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, int requestedExtent) { final int sampleSize = BitmapUtil.findOptimalSampleSize(holder.originalSmallerExtent, requestedExtent); byte[] bytes = holder.bytes; if (bytes == null || bytes.length == 0) { return; } if (sampleSize == holder.decodedSampleSize) { // 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 = BitmapUtil.decodeBitmapFromBytes(bytes, sampleSize); // TODO: As a temporary workaround while framework support is being added to // clip non-square bitmaps into a perfect circle, manually crop the bitmap into // into a square if it will be displayed as a thumbnail so that it can be cropped // into a circle. final int height = bitmap.getHeight(); final int width = bitmap.getWidth(); // The smaller dimension of a scaled bitmap can range from anywhere from 0 to just // below twice the length of a thumbnail image due to the way we calculate the optimal // sample size. if (height != width && Math.min(height, width) <= mThumbnailSize * 2) { final int dimension = Math.min(height, width); bitmap = ThumbnailUtils.extractThumbnail(bitmap, dimension, dimension); } // make bitmap mutable and draw size onto it if (DEBUG_SIZES) { Bitmap original = bitmap; bitmap = bitmap.copy(bitmap.getConfig(), true); original.recycle(); Canvas canvas = new Canvas(bitmap); Paint paint = new Paint(); paint.setTextSize(16); paint.setColor(Color.BLUE); paint.setStyle(Style.FILL); canvas.drawRect(0.0f, 0.0f, 50.0f, 20.0f, paint); paint.setColor(Color.WHITE); paint.setAntiAlias(true); canvas.drawText(bitmap.getWidth() + "/" + sampleSize, 0, 15, paint); } holder.decodedSampleSize = sampleSize; 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); // TODO: Temporarily disable contact photo fading in, until issues with // RoundedBitmapDrawables overlapping the default image drawables are resolved. boolean loaded = loadCachedPhoto(view, key, false); 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, int requestedExtent) { 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 + ", " + (bytes == null ? "<null>" : btk(bytes.length))); } BitmapHolder holder = new BitmapHolder(bytes, bytes == null ? -1 : BitmapUtil.getSmallerExtentFromBytes(bytes)); // Unless this image is being preloaded, decode it right away while // we are still on the background thread. if (!preloading) { inflateBitmap(holder, requestedExtent); } mBitmapHolderCache.put(key, holder); mBitmapHolderCacheAllUnfresh = false; } @Override public void cacheBitmap(Uri photoUri, Bitmap bitmap, byte[] photoBytes) { final int smallerExtent = Math.min(bitmap.getWidth(), bitmap.getHeight()); // We can pretend here that the extent of the photo was the size that we originally // requested Request request = Request.createFromUri(photoUri, smallerExtent, false /* darkTheme */, false /* isCircular */ , DEFAULT_AVATAR); BitmapHolder holder = new BitmapHolder(photoBytes, smallerExtent); holder.bitmapRef = new SoftReference<Bitmap>(bitmap); mBitmapHolderCache.put(request.getKey(), holder); mBitmapHolderCacheAllUnfresh = false; mBitmapCache.put(request.getKey(), bitmap); } /** * Populates an array of photo IDs that need to be loaded. Also decodes bitmaps that we have * already loaded */ private void obtainPhotoIdsAndUrisToLoad(Set<Long> photoIds, Set<String> photoIdsAsStrings, Set<Request> uris) { photoIds.clear(); photoIdsAsStrings.clear(); uris.clear(); boolean jpegsDecoded = false; /* * 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(); final BitmapHolder holder = mBitmapHolderCache.get(request.getKey()); if (holder != null && holder.bytes != null && holder.fresh && (holder.bitmapRef == null || holder.bitmapRef.get() == null)) { // This was previously loaded but we don't currently have the inflated Bitmap inflateBitmap(holder, request.getRequestedExtent()); jpegsDecoded = true; } else { if (holder == null || !holder.fresh) { if (request.isUriRequest()) { uris.add(request); } else { photoIds.add(request.getId()); photoIdsAsStrings.add(String.valueOf(request.mId)); } } } } if (jpegsDecoded) mMainThreadHandler.sendEmptyMessage(MESSAGE_PHOTOS_LOADED); } /** * 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<Request> 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); } loadThumbnails(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); loadThumbnails(false); loadUriBasedPhotos(); requestPreloading(); } /** Loads thumbnail photos with ids */ private void loadThumbnails(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, -1); 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) { // Not a profile photo and not found - mark the cache accordingly cacheBitmap(id, null, preloading, -1); } mMainThreadHandler.sendEmptyMessage(MESSAGE_PHOTOS_LOADED); } /** * Loads photos referenced with Uris. Those can be remote thumbnails * (from directory searches), display photos etc */ private void loadUriBasedPhotos() { for (Request uriRequest : mPhotoUris) { // Keep the original URI and use this to key into the cache. Failure to do so will // result in an image being continually reloaded into cache if the original URI // has a contact type encodedFragment (eg nearby places business photo URLs). Uri originalUri = uriRequest.getUri(); // Strip off the "contact type" we added to the URI to ensure it was identifiable as // a business photo -- there is no need to pass this on to the server. Uri uri = ContactPhotoManagerNew.removeContactType(originalUri); if (mBuffer == null) { mBuffer = new byte[BUFFER_SIZE]; } try { if (DEBUG) Log.d(TAG, "Loading " + uri); final String scheme = uri.getScheme(); InputStream is = null; if (scheme.equals("http") || scheme.equals("https")) { HttpsURLConnection urlConnection = (HttpsURLConnection) new URL(uri.toString()) .openConnection(); int responseCode = urlConnection.getResponseCode(); if (responseCode == HttpsURLConnection.HTTP_OK) { is = urlConnection.getInputStream(); } } else { 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(); } // for external requests resize bitmap to fit it in cache // bitmap should be below 8kb if (scheme.equals("http") || scheme.equals("https")) { if (baos.size() > 8 * 1024) { baos = getResizedBitmap(baos); } } cacheBitmap(originalUri, baos.toByteArray(), false, uriRequest.getRequestedExtent()); mMainThreadHandler.sendEmptyMessage(MESSAGE_PHOTOS_LOADED); } else { Log.v(TAG, "Cannot load photo " + uri); cacheBitmap(originalUri, null, false, uriRequest.getRequestedExtent()); } } catch (final Exception | OutOfMemoryError ex) { Log.v(TAG, "Cannot load photo " + uri, ex); cacheBitmap(originalUri, null, false, uriRequest.getRequestedExtent()); } } } @NonNull private ByteArrayOutputStream getResizedBitmap(ByteArrayOutputStream baos) { byte[] bitmapBytes = baos.toByteArray(); Bitmap bitmap = BitmapFactory.decodeByteArray(bitmapBytes, 0, bitmapBytes.length); if (bitmap != null) { int height = (int) (bitmap.getHeight() * (50.0f / bitmap.getWidth())); bitmap = Bitmap.createScaledBitmap(bitmap, (int) 50.0f, height, true); baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); } return baos; } } /** * 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 int mRequestedExtent; private final DefaultImageProvider mDefaultProvider; /** * Whether or not the contact photo is to be displayed as a circle */ private final boolean mIsCircular; private Request(long id, Uri uri, int requestedExtent, boolean darkTheme, boolean isCircular, DefaultImageProvider defaultProvider) { mId = id; mUri = uri; mDarkTheme = darkTheme; mIsCircular = isCircular; mRequestedExtent = requestedExtent; mDefaultProvider = defaultProvider; } public static Request createFromThumbnailId(long id, boolean darkTheme, boolean isCircular, DefaultImageProvider defaultProvider) { return new Request(id, null /* no URI */, -1, darkTheme, isCircular, defaultProvider); } public static Request createFromUri(Uri uri, int requestedExtent, boolean darkTheme, boolean isCircular, DefaultImageProvider defaultProvider) { return new Request(0 /* no ID */, uri, requestedExtent, darkTheme, isCircular, defaultProvider); } public boolean isUriRequest() { return mUri != null; } public Uri getUri() { return mUri; } public long getId() { return mId; } public int getRequestedExtent() { return mRequestedExtent; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + (int) (mId ^ (mId >>> 32)); result = prime * result + mRequestedExtent; result = prime * result + ((mUri == null) ? 0 : mUri.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; final Request that = (Request) obj; if (mId != that.mId) return false; if (mRequestedExtent != that.mRequestedExtent) return false; if (!UriUtils.areEqual(mUri, that.mUri)) return false; // Don't compare equality of mDarkTheme because it is only used in the default contact // photo case. When the contact does have a photo, the contact photo is the same // regardless of mDarkTheme, so we shouldn't need to put the photo request on the queue // twice. return true; } public Object getKey() { return mUri == null ? mId : mUri; } /** * Applies the default image to the current view. If the request is URI-based, looks for * the contact type encoded fragment to determine if this is a request for a business photo, * in which case we will load the default business photo. * * @param view The current image view to apply the image to. * @param isCircular Whether the image is circular or not. */ public void applyDefaultImage(ImageView view, boolean isCircular) { final DefaultImageRequest request; if (isCircular) { request = ContactPhotoManagerNew.isBusinessContactUri(mUri) ? DefaultImageRequest.EMPTY_CIRCULAR_BUSINESS_IMAGE_REQUEST : DefaultImageRequest.EMPTY_CIRCULAR_DEFAULT_IMAGE_REQUEST; } else { request = ContactPhotoManagerNew.isBusinessContactUri(mUri) ? DefaultImageRequest.EMPTY_DEFAULT_BUSINESS_IMAGE_REQUEST : DefaultImageRequest.EMPTY_DEFAULT_IMAGE_REQUEST; } mDefaultProvider.applyDefaultImage(view, mRequestedExtent, mDarkTheme, request); } } }