毕加索不能容忍空的字符串URL吗? [英] Picasso doesn't tolerate empty String URL?

问题描述

我有一个viewHolder可以使用毕加索加载图像. DB将返回URL的路径作为String.所以我的代码如下(使用Kotlin)

I have a viewHolder that loads up an image using Picasso. The DB will return a path of URL as String. So I have my code as below (Using Kotlin)

  Picasso.with(context).load(url).error(placeholder).transform(transformation)
            .placeholder(placeholder).into(this)

加载正常.但是，有时URL为空.我期望它代替加载占位符.但它崩溃如下所示

It loads fine. However, sometimes the URL is empty. I'm expecting it to load the placeholder instead. But it crash out as below

java.lang.IllegalArgumentException: Path must not be empty.
    at com.squareup.picasso.Picasso.load(Picasso.java:297)

这将迫使我明确进行检查，这不理想

This would force me to explicitly do a check, which is not ideal

if (url == null || url.isEmpty()) {
    Picasso.with(context).load(placeholder).transform(transformation).into(this)
} else {
    Picasso.with(context).load(url).error(placeholder).transform(transformation)
            .placeholder(placeholder).into(this)
}

是否期望URL字符串为空而不是加载占位符时毕加索会崩溃?

Is this expected that Picasso will crash when a URL String is empty instead of loading the placeholder?

推荐答案

javadoc for Picasso.load()明确指出，如果URL为null或为空，它将抛出IllegalArgumentException.这就是您所期望的.

The javadoc for Picasso.load() explicitly states that it will throw an IllegalArgumentException when the URL is null or empty. So that's what you can expect.

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