blocks|key|300350|text|Picasso+2.0支持将回调附加到请求中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|300351|https://github.com/square/picasso|offset|length|300352|您正在使用的回调是针对“全局”侦听器的，它可以帮助您调试由于网络负载而可能发生的错误。|300353|在毕加索2.0中使用load(url).into(view,+new+Callback()+{...});。|style|CODE|300354|如果您正在使用Callback，请记住调用cancelRequest(target)。|300355|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|X|0|0|0|A|17|0|7|8|L|L|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@$D|11|E|12|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|13|8|@$D|14|E|15|J|K]|$D|16|E|17|J|K]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|C]]]]

Picasso 2.0 allows you to attach a callback into a request.

<a href="https://github.com/square/picasso">https://github.com/square/picasso</a>

The callback you are using is for "global" listener and it helps you debug errors that potentially happen due to a network load.

Use <code>load(url).into(view, new Callback() {...});</code> in Picasso 2.0.

Remember to invoke <code>cancelRequest(target)</code> if you are using a <code>Callback</code>.

blocks|key|300365|text|这只是一个建议，但是如果您创建一个“空的”png文件并将其设置为res文件夹中的默认图像文件，则可以避免编程中的问题……我知道有点傻..。但很可能在没有战斗的情况下工作...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|300366|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Just a suggestion, but you might avoid issues in programming if you make an "empty" png file and set it as the default image file in your res folder... kinda silly i know... but likely to work without fighting...

blocks|key|300371|text|我的例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|300372|Picasso+picasso+=+new+Picasso.Builder(parent.getContext())
++++++++++++.listener(new+Picasso.Listener()+{
++++++++++++++++@Override
++++++++++++++++public+void+onImageLoadFailed(Picasso+picasso,+Uri+uri,+Exception+exception)+{
++++++++++++++++//Here+your+log
++++++++++++++++}
++++++++++++})
++++++++++++.build();
++++picasso.load(shopModel.getShopImg())
++++++++++++.fit()
++++++++++++.into(viewHolder.shopImg);|code-block|syntax|javascript|300373|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

My example: 

<pre><code>Picasso picasso = new Picasso.Builder(parent.getContext())
 .listener(new Picasso.Listener() {
 @Override
 public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
 //Here your log
 }
 })
 .build();
 picasso.load(shopModel.getShopImg())
 .fit()
 .into(viewHolder.shopImg);
</code></pre>

blocks|key|82828|text|我的答案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|82829|File+file+=+new+File(filePath);
++++++++Picasso.with(context).load(file).placeholder(R.drawable.draw_detailed_view_display).error(R.drawable.draw_detailed_view_display)
++++++++.resize(400,+400).into(mImageView,+new+Callback()+{

++++++++++++@Override
++++++++++++public+void+onSuccess()+{

++++++++++++}

++++++++++++@Override
++++++++++++public+void+onError()+{
++++++++++++++++mImageView.setVisibility(View.GONE);
++++++++++++}
++++++++});|code-block|syntax|javascript|82830|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

My answer:

<pre><code>File file = new File(filePath);
 Picasso.with(context).load(file).placeholder(R.drawable.draw_detailed_view_display).error(R.drawable.draw_detailed_view_display)
 .resize(400, 400).into(mImageView, new Callback() {

 @Override
 public void onSuccess() {

 }

 @Override
 public void onError() {
 mImageView.setVisibility(View.GONE);
 }
 });
</code></pre>

blocks|key|82847|text|您可以尝试添加一个“全局”侦听器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|82848|++++//+create+Picasso.Builder+object
++++Picasso.Builder+picassoBuilder+=+new+Picasso.Builder(this);

++++picassoBuilder.listener(new+Picasso.Listener()+{
++++++++@Override
++++++++public+void+onImageLoadFailed(Picasso+picasso,+Uri+uri,+Exception+exception)+{
++++++++++++Log.e("PICASSO",+uri.toString(),+exception);
++++++++}
++++});

++++//+Picasso.Builder+creates+the+Picasso+object+to+do+the+actual+requests
++++Picasso+picasso+=+picassoBuilder.build();

++++try+{
++++++++Picasso.setSingletonInstance(picasso);
++++}+catch+(IllegalStateException+ignored)+{
++++++++//+Picasso+instance+was+already+set
++++++++//+cannot+set+it+after+Picasso.with(Context)+was+already+in+use
++++}|code-block|syntax|javascript|82849|任何后续对Picasso.with(Context+context)的调用都会返回连接到listener的实例，因此所有的失败都会被记录下来。|offset|length|style|CODE|82850|请注意，您需要尽快调用setSingletonInstance，例如在应用程序onCreate中。|82851|附注:此处采用的代码-+Customizing+Picasso+with+Picasso.Builder|82852|entityMap|0|LINK|mutability|MUTABLE|url|https://futurestud.io/blog/picasso-customizing-picasso-with-picasso-builder^0|0|0|5|T|0|B|K|13|8|0|C|14|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@$I|11|J|12|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@$I|14|J|15|K|L]|$I|16|J|17|K|L]]|9|@]|A|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@$I|19|J|1A|1|1B]]|A|$]]|$1|Q|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

You can try to add a 'global' listener.

<pre><code> // create Picasso.Builder object
 Picasso.Builder picassoBuilder = new Picasso.Builder(this);

 picassoBuilder.listener(new Picasso.Listener() {
 @Override
 public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
 Log.e("PICASSO", uri.toString(), exception);
 }
 });

 // Picasso.Builder creates the Picasso object to do the actual requests
 Picasso picasso = picassoBuilder.build();

 try {
 Picasso.setSingletonInstance(picasso);
 } catch (IllegalStateException ignored) {
 // Picasso instance was already set
 // cannot set it after Picasso.with(Context) was already in use
 }
</code></pre>

Any subsequent calls to <code>Picasso.with(Context context)</code> will return the instance which connected to listener, so all fails will be logged.

Please note that you need to call <code>setSingletonInstance</code> as soon as possible, e.g. in Application <code>onCreate</code>.

P.S. Code adopted from here - <a href="https://futurestud.io/blog/picasso-customizing-picasso-with-picasso-builder" rel="noreferrer">Customizing Picasso with Picasso.Builder</a>

I'm playing around with the Picasso library for image loading, but I'm running into an issue. When an image fails to load, I want to hide the view rather than load in a default image. I noticed from the source that it looks like the only way to add a listener is from the builder, but the error method is never called when an image does fail to load. Anyone have any experience with this?

<pre><code> iv = (ImageView) findViewById(R.id.imageView);

 Picasso.Builder builder = new Picasso.Builder(getApplicationContext());
 builder.listener(new Picasso.Listener() {

 @Override
 public void onImageLoadFailed(Picasso arg0, String arg1) {
 Log.e("Picasso Error", "Errored out, hiding view");
 iv.setVisibility(View.GONE);
 }
 });
 Picasso pic = builder.build();
 pic.load("thisshouldbreak.jpg").into(iv);
</code></pre>

Picasso Library, Android: Using Error Listener

我正在尝试使用Picasso库来加载图像，但我遇到了一个问题。当图像加载失败时，我希望隐藏视图，而不是加载默认图像。我从源代码中注意到，看起来添加侦听器的唯一方法是从构建器添加，但当图像加载失败时，error方法永远不会被调用。有谁有这方面的经验吗？    iv = (ImageView) findViewById(R...

问Picasso Library，Android:使用错误侦听器
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