Android：Picasso加载图片失败。如何显示错误消息

Question

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。我如何知道图像未成功加载的原因？

Answer 1

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);

修改

对于版本2.71828，他们已将异常添加到onError回调中：

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

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

Answer 2

当你使用回调时，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);
                    }
                });

Answer 3

您是否在[[1, 2, 3, 4], [3, 4, 5, 6]] 添加了互联网权限？凯文回答here，请查看异常日志并在此处发布例外。

Answer 4

UPDATE   STUDENT_BASE                     
SET   NAME    = :name
                                                      
WHERE ID      = :id               
AND   BR_NO   = :brNo

Answer 5

请尝试检查毕加索的日志

Picasso.with(getContext()).setLoggingEnabled(true);

Answer 6

You have use picasso exception handler. Because if you are to use traditional exception handler(try / catch) it wont catch the actual exception.

var imgURL = Your image url
var imgHolder = Id of your image view

val picasso = Picasso.Builder(this@yourActivity)
            .listener { picasso, uri, exception ->
                //Here your log - Log cat - error
                Log.e("Exception ", exception.stackTraceToString())
            }
            .build()

        picasso.load(imgURL)
            .fit()
            .into(imgHolder)