File cacheDir =StorageUtils.getOwnCacheDirectory(this, "imageloader/Cache"); ImageLoaderConfigurationconfig = new ImageLoaderConfiguration .Builder(this) .memoryCacheExtraOptions(480, 800) // maxwidth, max height，即保存的每个缓存文件的最大长宽 .threadPoolSize(3)//线程池内加载的数量 .threadPriority(Thread.NORM_PRIORITY -2) .denyCacheImageMultipleSizesInMemory() .memoryCache(new UsingFreqLimitedMemoryCache(2* 1024 * 1024)) // You can pass your own memory cache implementation/你可以通过自己的内存缓存实现 .memoryCacheSize(2 * 1024 * 1024) .discCacheSize(50 * 1024 * 1024) .discCacheFileNameGenerator(newMd5FileNameGenerator())//将保存的时候的URI名称用MD5 加密 .tasksProcessingOrder(QueueProcessingType.LIFO) .discCacheFileCount(100) //缓存的文件数量 .discCache(new UnlimitedDiscCache(cacheDir))//自定义缓存路径 .defaultDisplayImageOptions(DisplayImageOptions.createSimple()) .imageDownloader(new BaseImageDownloader(this,5 * 1000, 30 * 1000)) // connectTimeout (5 s), readTimeout (30 s)超时时间 .writeDebugLogs() // Remove for releaseapp .build();//开始构建 ImageLoader.getInstance().init(config);
得到imageLoader
ImageLoader imageLoader imageLoader = ImageLoader.getInstance();
使用过程：
(1)图像操作是否参与缓存以及图像效果的配置操作
DisplayImageOptions options = new DisplayImageOptions.Builder() .showImageOnLoading(R.drawable.ic_stub) //加载图片时的图片 .showImageForEmptyUri(R.drawable.ic_empty) //没有图片资源时的默认图片 .showImageOnFail(R.drawable.ic_error) //加载失败时的图片 .cacheInMemory(true) //启用内存缓存 .cacheOnDisk(true) //启用外存缓存 .considerExifParams(true) //启用EXIF和JPEG图像格式 .displayer(new RoundedBitmapDisplayer(20)) //设置显示风格这里是圆角矩形 .build();
DisplayImageOptions以下是所有默认配置参数根据需求可以自定义配置
private int imageResOnLoading = 0; private int imageResForEmptyUri = 0; private int imageResOnFail = 0; private Drawable imageOnLoading = null; private Drawable imageForEmptyUri = null; private Drawable imageOnFail = null; private boolean resetViewBeforeLoading = false; private boolean cacheInMemory = false; private boolean cacheOnDisk = false; private ImageScaleType imageScaleType = ImageScaleType.IN_SAMPLE_POWER_OF_2; private Options decodingOptions = new Options(); private int delayBeforeLoading = 0; private boolean considerExifParams = false; private Object extraForDownloader = null; private BitmapProcessor preProcessor = null; private BitmapProcessor postProcessor = null; private BitmapDisplayer displayer = DefaultConfigurationFactory.createBitmapDisplayer(); private Handler handler = null; private boolean isSyncLoading = false;
