Java 类com.facebook.imagepipeline.backends.okhttp3.OkHttpNetworkFetcher 实例源码

@Override
public void onCreate() {
    super.onCreate();
    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .build();
    ImagePipelineConfig config = OkHttpImagePipelineConfigFactory.newBuilder(this, okHttpClient)
            .setMainDiskCacheConfig(getDiskCacheConfig())
            .setNetworkFetcher(new OkHttpNetworkFetcher(okHttpClient))
            .setDownsampleEnabled(true)
            .build();
    Fresco.initialize(this, config);

    Context context = getApplicationContext();
    String packageName = context.getPackageName();
    String processName = getProcessName(android.os.Process.myPid());
    CrashReport.UserStrategy strategy = new CrashReport.UserStrategy(context);
    strategy.setUploadProcess(processName == null || processName.equals(packageName));
    CrashReport.initCrashReport(getApplicationContext(), "0a6e92fb70", false, strategy);

    registerActivityLifecycleCallbacks(ActivityLifecycleHelper.build());
}

public static ImagePipelineConfig.Builder getConfigBuilder(Context context, File baseDirectoryPath, OkHttpClient okHttpClient) {

        DiskCacheConfig smallDiskCacheConfig = DiskCacheConfig
                .newBuilder(context).setBaseDirectoryPath(baseDirectoryPath)
                .setBaseDirectoryName(IMAGE_PIPELINE_SMALL_CACHE_DIR)
                .setMaxCacheSize(MAX_DISK_CACHE_SIZE)
                .setMaxCacheSizeOnLowDiskSpace(MAX_DISK_CACHE_LOW_SIZE)
                .setMaxCacheSizeOnVeryLowDiskSpace(MAX_DISK_CACHE_VERYLOW_SIZE)
                .build();
        DiskCacheConfig diskCacheConfig = DiskCacheConfig.newBuilder(context)
                                                         .setBaseDirectoryPath(baseDirectoryPath)//缓存图片基路径
                                                         .setBaseDirectoryName(IMAGE_PIPELINE_CACHE_DIR)//文件夹名
                                                         .setMaxCacheSize(MAX_DISK_CACHE_SIZE)//默认缓存的最大大小。
                                                         .setMaxCacheSizeOnLowDiskSpace(MAX_DISK_CACHE_LOW_SIZE)//缓存的最大大小,当设备磁盘空间低时。
                                                         .setMaxCacheSizeOnVeryLowDiskSpace(MAX_DISK_CACHE_VERYLOW_SIZE)//缓存的最大大小,当设备磁盘空间极低时。
                                                         .build();
        OkHttpNetworkFetcher networkFetcher = new OkHttpNetworkFetcher(okHttpClient);
        return ImagePipelineConfig.newBuilder(context)
                                  .setNetworkFetcher(networkFetcher)//自定的网络层配置：如OkHttp，Volley
                                  .setCacheKeyFactory(LJCacheKeyFactory
                                          .getInstance())//缓存Key工厂
                                  .setBitmapMemoryCacheParamsSupplier(new LJBitmapMemoryCacheSupplier((ActivityManager) context
                                          .getSystemService(Context.ACTIVITY_SERVICE)))
                                  //内存缓存配置（一级缓存，已解码的图片）
                                  .setMainDiskCacheConfig(diskCacheConfig)//磁盘缓存配置（总，三级缓存）
                                  .setSmallImageDiskCacheConfig(smallDiskCacheConfig);//磁盘缓存配置（小图片，可选～三级缓存的小图优化缓存）
    }

/**
 * 初始化fresco
 */
private void initFresco() {

    Set<RequestListener> requestListeners = new HashSet<>();
    requestListeners.add(new RequestLoggingListener());
    ImagePipelineConfig config = ImagePipelineConfig.newBuilder(this)
            .setBitmapsConfig(Bitmap.Config.ARGB_8888)
            .setDownsampleEnabled(true)
            .setNetworkFetcher(new OkHttpNetworkFetcher(new OkHttpClient()))
            .setRequestListeners(requestListeners)
            .build();
    Fresco.initialize(this, config);
}