当手机离线并且无法加载图像时，毕加索不会调用onError

Question

我有Picasso的图像加载实现。我希望它在从URL加载图像时显示进度条。加载时，进度条将被隐藏。如果它不能，我希望它显示错误图像，甚至然后隐藏ProgressBar。

但如果没有网络连接，它永远不会调用onError，并且ProgressBar始终可见。

public class PicassoShowImageHideProgressBarCallback extends Callback.EmptyCallback {
    private ImageView mImageView;
    private ProgressBar mProgressBar;
    private static final String TAG = "PicassoShowImageHidePro";

    public PicassoShowImageHideProgressBarCallback(ImageView imageView,
            ProgressBar progressBar) {
        mImageView = imageView;
        mProgressBar = progressBar;
    }

    @Override
    public void onSuccess() {
        mImageView.setVisibility(View.VISIBLE);
        mProgressBar.setVisibility(View.GONE);
    }

    @Override
    public void onError() {
        mProgressBar.setVisibility(View.GONE);
    }
}

@BindView(R.id.poster_image)
ImageView mImageView;

@BindView(R.id.pb_progress_loading)
ProgressBar mProgressBar;

Picasso.with(mContext).load(path).error(R.drawable.ic_error).into(mImageView,
                new PicassoShowImageHideProgressBarCallback(mImageView, mProgressBar));

Answer 1

Does Picasso library for Android handle image loading while network connectivity is off?

请查看有关同一问题的上述链接。