mirror of
https://github.com/AntennaPod/AntennaPod.git
synced 2025-01-31 19:04:52 +01:00
Prevent images from being loaded multiple times
(copied from AntennaPodSP)
This commit is contained in:
daniel oeh
parent
dfa10a5989
commit
b9ab10253a
@ -1,14 +1,8 @@
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package de.danoeh.antennapod.asynctask;
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import java.io.InputStream;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ThreadFactory;
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import android.annotation.SuppressLint;
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import android.app.ActivityManager;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.os.Handler;
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import android.support.v4.util.LruCache;
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import android.util.Log;
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@ -17,214 +11,228 @@ import de.danoeh.antennapod.AppConfig;
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import de.danoeh.antennapod.PodcastApp;
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import de.danoeh.antennapod.R;
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/** Caches and loads FeedImage bitmaps in the background */
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import java.io.InputStream;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ThreadFactory;
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/**
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* Caches and loads FeedImage bitmaps in the background
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*/
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public class ImageLoader {
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private static final String TAG = "ImageLoader";
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private static ImageLoader singleton;
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private static final String TAG = "ImageLoader";
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private static ImageLoader singleton;
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public static final int IMAGE_TYPE_THUMBNAIL = 0;
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public static final int IMAGE_TYPE_COVER = 1;
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public static final int IMAGE_TYPE_THUMBNAIL = 0;
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public static final int IMAGE_TYPE_COVER = 1;
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private Handler handler;
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private ExecutorService executor;
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private Handler handler;
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private ExecutorService executor;
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/**
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* Stores references to loaded bitmaps. Bitmaps can be accessed by the id of
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* the FeedImage the bitmap belongs to.
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*/
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/**
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* Stores references to loaded bitmaps. Bitmaps can be accessed by the id of
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* the FeedImage the bitmap belongs to.
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*/
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final int memClass = ((ActivityManager) PodcastApp.getInstance()
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.getSystemService(Context.ACTIVITY_SERVICE)).getMemoryClass();
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final int memClass = ((ActivityManager) PodcastApp.getInstance()
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.getSystemService(Context.ACTIVITY_SERVICE)).getMemoryClass();
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// Use 1/8th of the available memory for this memory cache.
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final int thumbnailCacheSize = 1024 * 1024 * memClass / 8;
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// Use 1/8th of the available memory for this memory cache.
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final int thumbnailCacheSize = 1024 * 1024 * memClass / 8;
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private LruCache<String, CachedBitmap> coverCache;
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private LruCache<String, CachedBitmap> thumbnailCache;
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private LruCache<String, CachedBitmap> coverCache;
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private LruCache<String, CachedBitmap> thumbnailCache;
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private ImageLoader() {
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handler = new Handler();
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executor = createExecutor();
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private ImageLoader() {
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handler = new Handler();
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executor = createExecutor();
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coverCache = new LruCache<String, CachedBitmap>(1);
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coverCache = new LruCache<String, CachedBitmap>(1);
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thumbnailCache = new LruCache<String, CachedBitmap>(thumbnailCacheSize) {
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thumbnailCache = new LruCache<String, CachedBitmap>(thumbnailCacheSize) {
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@SuppressLint("NewApi")
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@Override
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protected int sizeOf(String key, CachedBitmap value) {
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if (Integer.valueOf(android.os.Build.VERSION.SDK_INT) >= 12)
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return value.getBitmap().getByteCount();
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else
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return (value.getBitmap().getRowBytes() * value.getBitmap()
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.getHeight());
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@SuppressLint("NewApi")
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@Override
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protected int sizeOf(String key, CachedBitmap value) {
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if (Integer.valueOf(android.os.Build.VERSION.SDK_INT) >= 12)
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return value.getBitmap().getByteCount();
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else
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return (value.getBitmap().getRowBytes() * value.getBitmap()
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.getHeight());
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}
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}
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};
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}
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};
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}
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private ExecutorService createExecutor() {
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return Executors.newFixedThreadPool(Runtime.getRuntime()
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.availableProcessors(), new ThreadFactory() {
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private ExecutorService createExecutor() {
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return Executors.newFixedThreadPool(Runtime.getRuntime()
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.availableProcessors(), new ThreadFactory() {
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@Override
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public Thread newThread(Runnable r) {
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Thread t = new Thread(r);
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t.setPriority(Thread.MIN_PRIORITY);
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return t;
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}
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});
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}
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@Override
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public Thread newThread(Runnable r) {
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Thread t = new Thread(r);
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t.setPriority(Thread.MIN_PRIORITY);
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return t;
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}
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});
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}
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public static synchronized ImageLoader getInstance() {
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if (singleton == null) {
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singleton = new ImageLoader();
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}
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return singleton;
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}
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public static synchronized ImageLoader getInstance() {
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if (singleton == null) {
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singleton = new ImageLoader();
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}
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return singleton;
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}
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/**
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* Load a bitmap from the cover cache. If the bitmap is not in the cache, it
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* will be loaded from the disk. This method should either be called if the
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* ImageView's size has already been set or inside a Runnable which is
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* posted to the ImageView's message queue.
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*/
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public void loadCoverBitmap(ImageWorkerTaskResource source, ImageView target) {
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loadCoverBitmap(source, target, target.getHeight());
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}
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/**
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* Load a bitmap from the cover cache. If the bitmap is not in the cache, it
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* will be loaded from the disk. This method should either be called if the
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* ImageView's size has already been set or inside a Runnable which is
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* posted to the ImageView's message queue.
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*/
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public void loadCoverBitmap(ImageWorkerTaskResource source, ImageView target) {
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loadCoverBitmap(source, target, target.getHeight());
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}
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/**
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* Load a bitmap from the cover cache. If the bitmap is not in the cache, it
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* will be loaded from the disk. This method should either be called if the
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* ImageView's size has already been set or inside a Runnable which is
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* posted to the ImageView's message queue.
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*/
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public void loadCoverBitmap(ImageWorkerTaskResource source,
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ImageView target, int length) {
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final int defaultCoverResource = getDefaultCoverResource(target
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.getContext());
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/**
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* Load a bitmap from the cover cache. If the bitmap is not in the cache, it
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* will be loaded from the disk. This method should either be called if the
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* ImageView's size has already been set or inside a Runnable which is
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* posted to the ImageView's message queue.
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*/
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public void loadCoverBitmap(ImageWorkerTaskResource source,
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ImageView target, int length) {
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final int defaultCoverResource = getDefaultCoverResource(target
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.getContext());
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final String cacheKey;
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if (source != null && (cacheKey = source.getImageLoaderCacheKey()) != null) {
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final Object currentTag = target.getTag(R.id.imageloader_key);
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if (currentTag == null || !cacheKey.equals(currentTag)) {
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target.setTag(R.id.imageloader_key, cacheKey);
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CachedBitmap cBitmap = getBitmapFromCoverCache(cacheKey);
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if (cBitmap != null && cBitmap.getLength() >= length) {
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target.setImageBitmap(cBitmap.getBitmap());
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} else {
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target.setImageResource(defaultCoverResource);
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BitmapDecodeWorkerTask worker = new BitmapDecodeWorkerTask(
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handler, target, source, length, IMAGE_TYPE_COVER);
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executor.submit(worker);
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}
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}
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} else {
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target.setImageResource(defaultCoverResource);
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}
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}
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if (source != null && source.getImageLoaderCacheKey() != null) {
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target.setTag(R.id.imageloader_key, source.getImageLoaderCacheKey());
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CachedBitmap cBitmap = getBitmapFromCoverCache(source.getImageLoaderCacheKey());
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if (cBitmap != null && cBitmap.getLength() >= length) {
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target.setImageBitmap(cBitmap.getBitmap());
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} else {
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target.setImageResource(defaultCoverResource);
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BitmapDecodeWorkerTask worker = new BitmapDecodeWorkerTask(
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handler, target, source, length, IMAGE_TYPE_COVER);
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executor.submit(worker);
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}
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} else {
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target.setImageResource(defaultCoverResource);
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}
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}
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/**
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* Load a bitmap from the thumbnail cache. If the bitmap is not in the
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* cache, it will be loaded from the disk. This method should either be
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* called if the ImageView's size has already been set or inside a Runnable
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* which is posted to the ImageView's message queue.
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*/
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public void loadThumbnailBitmap(ImageWorkerTaskResource source,
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ImageView target) {
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loadThumbnailBitmap(source, target, target.getHeight());
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}
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/**
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* Load a bitmap from the thumbnail cache. If the bitmap is not in the
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* cache, it will be loaded from the disk. This method should either be
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* called if the ImageView's size has already been set or inside a Runnable
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* which is posted to the ImageView's message queue.
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*/
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public void loadThumbnailBitmap(ImageWorkerTaskResource source,
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ImageView target) {
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loadThumbnailBitmap(source, target, target.getHeight());
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}
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/**
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* Load a bitmap from the thumbnail cache. If the bitmap is not in the
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* cache, it will be loaded from the disk. This method should either be
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* called if the ImageView's size has already been set or inside a Runnable
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* which is posted to the ImageView's message queue.
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*/
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public void loadThumbnailBitmap(ImageWorkerTaskResource source,
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ImageView target, int length) {
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final int defaultCoverResource = getDefaultCoverResource(target
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.getContext());
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final String cacheKey;
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if (source != null && (cacheKey = source.getImageLoaderCacheKey()) != null) {
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final Object currentTag = target.getTag(R.id.imageloader_key);
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if (currentTag == null || !cacheKey.equals(currentTag)) {
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target.setTag(R.id.imageloader_key, cacheKey);
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CachedBitmap cBitmap = getBitmapFromThumbnailCache(cacheKey);
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if (cBitmap != null && cBitmap.getLength() >= length) {
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target.setImageBitmap(cBitmap.getBitmap());
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} else {
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target.setImageResource(defaultCoverResource);
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BitmapDecodeWorkerTask worker = new BitmapDecodeWorkerTask(
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handler, target, source, length, IMAGE_TYPE_THUMBNAIL);
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executor.submit(worker);
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}
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}
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} else {
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target.setImageResource(defaultCoverResource);
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}
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}
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/**
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* Load a bitmap from the thumbnail cache. If the bitmap is not in the
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* cache, it will be loaded from the disk. This method should either be
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* called if the ImageView's size has already been set or inside a Runnable
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* which is posted to the ImageView's message queue.
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*/
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public void loadThumbnailBitmap(ImageWorkerTaskResource source,
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ImageView target, int length) {
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final int defaultCoverResource = getDefaultCoverResource(target
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.getContext());
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public void clearExecutorQueue() {
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executor.shutdownNow();
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if (AppConfig.DEBUG)
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Log.d(TAG, "Executor was shut down.");
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executor = createExecutor();
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if (source != null && source.getImageLoaderCacheKey() != null) {
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target.setTag(R.id.imageloader_key, source.getImageLoaderCacheKey());
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CachedBitmap cBitmap = getBitmapFromThumbnailCache(source.getImageLoaderCacheKey());
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if (cBitmap != null && cBitmap.getLength() >= length) {
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target.setImageBitmap(cBitmap.getBitmap());
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} else {
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target.setImageResource(defaultCoverResource);
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BitmapDecodeWorkerTask worker = new BitmapDecodeWorkerTask(
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handler, target, source, length, IMAGE_TYPE_THUMBNAIL);
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executor.submit(worker);
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}
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} else {
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target.setImageResource(defaultCoverResource);
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}
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}
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}
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public void clearExecutorQueue() {
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executor.shutdownNow();
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if (AppConfig.DEBUG)
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Log.d(TAG, "Executor was shut down.");
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executor = createExecutor();
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public void wipeImageCache() {
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coverCache.evictAll();
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thumbnailCache.evictAll();
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}
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}
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public boolean isInThumbnailCache(String fileUrl) {
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return thumbnailCache.get(fileUrl) != null;
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}
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public void wipeImageCache() {
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coverCache.evictAll();
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thumbnailCache.evictAll();
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}
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private CachedBitmap getBitmapFromThumbnailCache(String key) {
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return thumbnailCache.get(key);
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}
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public boolean isInThumbnailCache(String fileUrl) {
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return thumbnailCache.get(fileUrl) != null;
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}
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public void addBitmapToThumbnailCache(String key, CachedBitmap bitmap) {
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thumbnailCache.put(key, bitmap);
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}
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private CachedBitmap getBitmapFromThumbnailCache(String key) {
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return thumbnailCache.get(key);
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}
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public boolean isInCoverCache(String fileUrl) {
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return coverCache.get(fileUrl) != null;
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}
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public void addBitmapToThumbnailCache(String key, CachedBitmap bitmap) {
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thumbnailCache.put(key, bitmap);
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}
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private CachedBitmap getBitmapFromCoverCache(String key) {
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return coverCache.get(key);
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}
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public boolean isInCoverCache(String fileUrl) {
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return coverCache.get(fileUrl) != null;
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}
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public void addBitmapToCoverCache(String key, CachedBitmap bitmap) {
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coverCache.put(key, bitmap);
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}
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private CachedBitmap getBitmapFromCoverCache(String key) {
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return coverCache.get(key);
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}
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private int getDefaultCoverResource(Context context) {
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return android.R.color.transparent;
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}
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public void addBitmapToCoverCache(String key, CachedBitmap bitmap) {
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coverCache.put(key, bitmap);
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}
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/**
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* Used by the BitmapDecodeWorker task to retrieve the source of the bitmap.
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*/
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public interface ImageWorkerTaskResource {
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/**
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* Opens a new InputStream that can be decoded as a bitmap by the
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* BitmapFactory.
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*/
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public InputStream openImageInputStream();
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private int getDefaultCoverResource(Context context) {
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return android.R.color.transparent;
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}
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/**
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* Returns an InputStream that points to the beginning of the image
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* resource. Implementations can either create a new InputStream or
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* reset the existing one, depending on their implementation of
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* openInputStream. If a new InputStream is returned, the one given as a
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* parameter MUST be closed.
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*
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* @param input The input stream that was returned by openImageInputStream()
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*/
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public InputStream reopenImageInputStream(InputStream input);
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/**
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* Used by the BitmapDecodeWorker task to retrieve the source of the bitmap.
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*/
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public interface ImageWorkerTaskResource {
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/**
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* Opens a new InputStream that can be decoded as a bitmap by the
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* BitmapFactory.
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*/
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public InputStream openImageInputStream();
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/**
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* Returns an InputStream that points to the beginning of the image
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* resource. Implementations can either create a new InputStream or
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* reset the existing one, depending on their implementation of
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* openInputStream. If a new InputStream is returned, the one given as a
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* parameter MUST be closed.
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* @param input The input stream that was returned by openImageInputStream()
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* */
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public InputStream reopenImageInputStream(InputStream input);
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/**
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* Returns a string that identifies the image resource. Example: file
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* path of an image
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*/
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public String getImageLoaderCacheKey();
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}
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/**
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* Returns a string that identifies the image resource. Example: file
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* path of an image
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*/
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public String getImageLoaderCacheKey();
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}
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}
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