ReactImageView.java 文件源码

public void setShouldNotifyLoadEvents(boolean shouldNotify) {
  if (!shouldNotify) {
    mControllerListener = null;
  } else {
    final EventDispatcher mEventDispatcher = ((ReactContext) getContext()).
        getNativeModule(UIManagerModule.class).getEventDispatcher();

    mControllerListener = new BaseControllerListener<ImageInfo>() {
      @Override
      public void onSubmit(String id, Object callerContext) {
        mEventDispatcher.dispatchEvent(
            new ImageLoadEvent(getId(), ImageLoadEvent.ON_LOAD_START));
      }

      @Override
      public void onFinalImageSet(
          String id,
          @Nullable final ImageInfo imageInfo,
          @Nullable Animatable animatable) {
        if (imageInfo != null) {
          mEventDispatcher.dispatchEvent(
            new ImageLoadEvent(getId(), ImageLoadEvent.ON_LOAD,
              mImageSource.getSource(), imageInfo.getWidth(), imageInfo.getHeight()));
          mEventDispatcher.dispatchEvent(
            new ImageLoadEvent(getId(), ImageLoadEvent.ON_LOAD_END));
        }
      }

      @Override
      public void onFailure(String id, Throwable throwable) {
        mEventDispatcher.dispatchEvent(
          new ImageLoadEvent(getId(), ImageLoadEvent.ON_ERROR));
        mEventDispatcher.dispatchEvent(
          new ImageLoadEvent(getId(), ImageLoadEvent.ON_LOAD_END));
      }
    };
  }

  mIsDirty = true;
}