网络连接关闭时,适用于Android的Picasso库是否可以处理图像加载？

我正在开发一个使用Picasso library在ViewPager和其他ImageView中加载图像的应用程序.所以我想知道如果关闭网络连接会发生什么.库会自行处理还是在将图像加载到视图之前检查网络连接？

我的代码：

Picasso picasso = Picasso.with(getActivity());
        picasso.setDebugging(true);
        picasso.load(downloadPath+imgDetailPhoto)
                .placeholder(R.drawable.no_image)
                .error(android.R.drawable.stat_notify_error)
                .into(eventImage, new Callback() {
                    @Override
                    public void onSuccess() {
                         Log.d("Success...", "picasso loaded successfully");
                    }

                    @Override
                    public void one rror() {
                        Log.d("Error...", "picasso load error");

                    }
                });

解决方法:

使用以下代码,毕加索可缓存图像以供离线使用.

Picasso.with(this)
        .load(downloadPath+imgDetailPhoto)
        .placeholder(R.drawable.no_image)
        .error(android.R.drawable.stat_notify_error)
        .networkPolicy(NetworkPolicy.OFFLINE)//use this for offline support
        .into(eventImage);

上面的代码在删除缓存时不起作用,因此毕加索无法从缓存中找到图像,如果没有从缓存中获取图像,我们将使图像在线并显示.我们使用以下代码来实现：

Picasso.with(getActivity())
.load(downloadPath+imgDetailPhoto)
.placeholder(R.drawable.no_image)
.error(android.R.drawable.stat_notify_error)
.networkPolicy(NetworkPolicy.OFFLINE)//user this for offline support
.into(eventImage, new Callback() {
@Override
public void onSuccess() {

}

@Override
public void one rror() {
          Picasso.with(getActivity())
.load(downloadPath+imgDetailPhoto)
.placeholder(R.drawable.no_image)
.error(android.R.drawable.stat_notify_error)
.networkPolicy(NetworkPolicy.OFFLINE)//user this for offline support
.into(eventImage, new Callback() {
        @Override
        public void onSuccess() {

        }

        @Override
        public void one rror() {
           //get error if image not loaded
        }
    });
}
});

标签：image-loading,picasso,offline-mode,android
来源： https://codeday.me/bug/20191027/1946116.html