Android：毕加索加载图像失败。如何显示错误信息

Android: Picasso load image failed . how to show error message

提问by LittleFunny

I am trying to use the picasso library to loading the image store in the mediastore. When I called load(imageview, callback), the picasso call onFail instead of onSuccess. How do I know why the image was not loaded successfully?

我正在尝试使用 picasso 库在 mediastore 中加载图像存储。当我调用 load(imageview, callback) 时，毕加索调用 onFail 而不是 onSuccess。我怎么知道为什么图片没有成功加载？

回答by Kevin van Mierlo

Use builder:

使用构建器：

    Picasso.Builder builder = new Picasso.Builder(this);
    builder.listener(new Picasso.Listener()
    {
        @Override
        public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception)
        {
            exception.printStackTrace();
        }
    });
    builder.build().load(URL).into(imageView);

Edit

编辑

For version 2.71828 they have added the exception to the onError callback:

对于 2.71828 版本，他们在 onError 回调中添加了异常：

        Picasso.get()
            .load("yoururlhere")
            .into(imageView, new Callback() {
                @Override
                public void onSuccess() {
                }

                @Override
                public void onError(Exception e) {
                }
            })

回答by TVT. Jake

When you use callback, the picaso will call method onSuccess and onError!

当您使用回调时，picaso 将调用方法 onSuccess 和 onError！

File fileImage = new File(mPathImage);
        Picasso.with(mContext).load(fileImage)
                .placeholder(R.drawable.draw_detailed_view_display)
                .error(R.drawable.draw_detailed_view_display)
                .resize(200, 200)
                .into(holder.mImageEvidence, new Callback() {
                    @Override
                    public void onSuccess() {
                        holder.mMediaEvidencePb.setVisibility(View.GONE);
                    }

                    @Override
                    public void onError() {
                        holder.mErrorImage.setVisibility(View.VISIBLE);
                    }
                });

回答by donfuxx

In case you want to use Picasso with Kotlin and lambda expression it could be as short as this:

如果您想将 Picasso 与 Kotlin 和 lambda 表达式一起使用，它可以像这样短：

val picasso = Picasso.Builder(context)
            .listener { _, _, e -> e.printStackTrace() }
            .build()

...and then you can load image as usual:

...然后你可以像往常一样加载图像：

picasso.load(url).into(imageView)

回答by viper

Have you added internet permission in Manifest? With Kevin's answer here, Please see the exception log and post the exception here.

您是否在 中添加了互联网权限Manifest？随着凯文的答案在这里，请参阅异常日志并张贴在这里的例外。