Created
March 26, 2013 09:19
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private DiskLruCache mDiskLruCache; | |
private final Object mDiskCacheLock = new Object(); | |
private boolean mDiskCacheStarting = true; | |
private static final int DISK_CACHE_SIZE = 1024 * 1024 * 10; // 10MB | |
private static final String DISK_CACHE_SUBDIR = "disk_cache"; | |
File cacheDir = getDiskCacheDir(this, DISK_CACHE_SUBDIR); | |
new InitDiskCacheTask().execute(cacheDir); | |
class InitDiskCacheTask extends AsyncTask<File, Void, Void> { | |
@Override | |
protected Void doInBackground(File... params) { | |
synchronized (mDiskCacheLock) { | |
File cacheDir = params[0]; | |
mDiskLruCache = DiskLruCache.open(cacheDir, DISK_CACHE_SIZE); | |
mDiskCacheStarting = false; // 初始化完成 | |
mDiskCacheLock.notifyAll(); | |
} | |
return null; | |
} | |
} | |
public void addBitmapToCache(String key, Bitmap bitmap) { | |
// 首先将图片加入到内存缓存中 | |
if (getBitmapFromMemCache(key) == null) { | |
mMemoryCache.put(key, bitmap); | |
} | |
// 将图片加入到外部存储缓存中 | |
synchronized (mDiskCacheLock) { | |
if (mDiskLruCache != null && mDiskLruCache.get(key) == null) { | |
mDiskLruCache.put(key, bitmap); | |
} | |
} | |
} | |
public Bitmap getBitmapFromDiskCache(String key) { | |
synchronized (mDiskCacheLock) { | |
// 等待外部存储缓存初始化 | |
while (mDiskCacheStarting) { | |
try { | |
mDiskCacheLock.wait(); | |
} catch (InterruptedException e) {} | |
} | |
if (mDiskLruCache != null) { | |
return mDiskLruCache.get(key); | |
} | |
} | |
return null; | |
} |
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