MyApp

public class MyApp extends Application {
    private Context context;

    @Override
    public void onCreate() {
        super.onCreate();
        context = this;
        //初始化imageloader
        initImageLoader();
    }

    private void initImageLoader() {
        //sdcard路径

        String path = Environment.getExternalStorageDirectory().getAbsolutePath();
        File file = new File(path + "/baway");
        if (!file.exists()) {
            file.mkdir();
        }

        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)
                .threadPoolSize(3) // default
                .threadPriority(Thread.NORM_PRIORITY - 1) // default
                .tasksProcessingOrder(QueueProcessingType.FIFO) // default
                .denyCacheImageMultipleSizesInMemory()
                .memoryCache(new LruMemoryCache(2 * 1024 * 1024))
                .memoryCacheSize(2 * 1024 * 1024)
                .memoryCacheSizePercentage(13) // default
                .diskCache(new UnlimitedDiskCache(file)) // 配置sdcard的缓存路径
                .diskCacheSize(50 * 1024 * 1024)
                .diskCacheFileCount(100)
                .diskCacheFileNameGenerator(new HashCodeFileNameGenerator()) // default
                .defaultDisplayImageOptions(DisplayImageOptions.createSimple()) // default
                .writeDebugLogs()
                .build();
        ImageLoader.getInstance().init(config);
    }

    public static DisplayImageOptions getOptions() {
        DisplayImageOptions options = new DisplayImageOptions.Builder()
                .cacheInMemory(true) // default
                .cacheOnDisk(true) // default
                .imageScaleType(ImageScaleType.IN_SAMPLE_POWER_OF_2) // default
                .bitmapConfig(Bitmap.Config.ARGB_8888) // default
                .displayer(new SimpleBitmapDisplayer()) // default
                .handler(new Handler()) // default
                .build();
        return options;
    }
}