blocks|key|4057666|text|我想你可以使用毕加索的目标类|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4057667|Target+t+=+new+Target()+{
+@Override
+public+void+onBitmapLoaded(Bitmap+bitmap,+Picasso.LoadedFrom+from)+{
+++++++++//hideProgress
}

@Override
public+void+onBitmapFailed(Drawable+errorDrawable)+{
+++++++++++//hideProgress
}

+@Override
++public+void+onPrepareLoad(Drawable+placeHolderDrawable)+{

++++++++//lshow+Progress
+}
};

+Picasso.with(context)
.load(strImage)
.transform(transformation)
.placeholder(R.drawable.nothing_found)
.error(R.drawable.nothing_found)
.into(t);|code-block|syntax|javascript|4057668|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|$]]

I think you can use Target Class of Picasso

<pre><code>Target t = new Target() {
 @Override
 public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
 //hideProgress
}

@Override
public void onBitmapFailed(Drawable errorDrawable) {
 //hideProgress
}

 @Override
 public void onPrepareLoad(Drawable placeHolderDrawable) {

 //lshow Progress
 }
};

 Picasso.with(context)
.load(strImage)
.transform(transformation)
.placeholder(R.drawable.nothing_found)
.error(R.drawable.nothing_found)
.into(t);
</code></pre>

blocks|key|4057734|text|在xml文件中，必须将进度条放在图像的上方，将进度条的可见性设置为可见的，并在代码中设置。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|4057735|Picasso.with(context)
+++++++.load(file)
+++++++.into(imageView,+new+Callback()+{
+++++++++++@Override
+++++++++++public+void+onSuccess()+{
+++++++++++++++progressbar.setVisibility(View.GONE);
+++++++++++}
+++++++});|code-block|syntax|javascript|4057736|下载图像时，必须使用setVisibility(View.GONE)进行进度栏|4057737|entityMap^0|M|8|0|0|A|O|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

in your xml file you have to put progressbar above image, set visibility of progressbar visible and in your code 

<pre><code>Picasso.with(context)
 .load(file)
 .into(imageView, new Callback() {
 @Override
 public void onSuccess() {
 progressbar.setVisibility(View.GONE);
 }
 });
</code></pre>

when image is download you have to setVisibility(View.GONE) to progressbar

blocks|key|4057769|text|将ProgressBar添加到放置ImageView的XML中，或以编程方式执行。然后你就可以：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4057770|+ProgressBar+progressBar+;+//initialize+it+as+you+dud+with+the+imageView
++++progressBar.setVisibility(View.VISIBLE);
++++Picasso.with(context)
++++++++++++.load(imageURL)
++++++++++++.transform(transformation)
++++++++++++.placeholder(R.drawable.ic_launcher)
++++++++++++.error(R.drawable.ic_launcher)
++++++++++++.into(viewHolder.imageView,+new+Callback()+{
++++++++++++++++@Override
++++++++++++++++public+void+onSuccess()+{
++++++++++++++++++++progressBar.setVisibility(View.GONE);
++++++++++++++++}
++++++++++++++++@Override
++++++++++++++++public+void+onError()+{
++++++++++++++++}
++++++++++++});|code-block|syntax|javascript|4057771|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|$]]

Add ProgressBar to your XML where you put the ImageView , or do it programmatically. Then you could do:

<pre><code> ProgressBar progressBar ; //initialize it as you dud with the imageView
 progressBar.setVisibility(View.VISIBLE);
 Picasso.with(context)
 .load(imageURL)
 .transform(transformation)
 .placeholder(R.drawable.ic_launcher)
 .error(R.drawable.ic_launcher)
 .into(viewHolder.imageView, new Callback() {
 @Override
 public void onSuccess() {
 progressBar.setVisibility(View.GONE);
 }
 @Override
 public void onError() {
 }
 });
</code></pre>

blocks|key|4057773|text|在通过的谷歌开发者峰会泰国，谷歌向我们介绍了一个图像装载机图书馆为Android开发，由一个名为Glide的碰碰车技术，作为一个图书馆，由谷歌推荐。到目前为止，它已经在许多Google开源项目中使用，包括Google+/O+2014官方应用程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4057774|它成功地使我感兴趣。我花了一整晚玩它，并决定分享我的经验，在这篇博客文章。作为一个开始，我必须说，它看起来90%25类似毕加索。更准确地说，我认为这有点像毕加索的克隆人。|4057775|不管怎样，这在细节上是完全不同的。你会学到怎么做。|4057776|http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en|offset|length|4057777|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|25|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@$H|U|I|V|1|W]]|A|$]]|$1|J|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|G]]]]

In the passed Google Developer Summit Thailand, Google introduced us an Image Loader Library for Android developed by bumptech named Glide as a library that recommended by Google. It has been used in many Google open source projects till now including Google I/O 2014 official application.

It succeeded in making me interested. I spent a whole night playing with it and decided to share my experience in this blog post. As a begining, I must say that it looks 90% similar to Picasso. To be more precise, I think it is something like a Picasso-clone.

Anyway it is quite different in details. You will learn how.

<a href="http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en">http://inthecheesefactory.com/blog/get-to-know-glide-recommended-by-google/en</a>

blocks|key|3720708|text|mProgressDialog+=+new+ProgressDialog(getActivity());
++++++++mProgressDialog.setMessage("Wait+a+moment,+loading+image...");
++++++++mProgressDialog.setCanceledOnTouchOutside(false);
++++++++mProgressDialog.setCancelable(false);
++++++++mProgressDialog.show();

++++++++Picasso.with(getActivity()).load(mImagePath).into(mImageView,+new+Callback()+{
++++++++++++@Override
++++++++++++public+void+onSuccess()+{
++++++++++++++++mProgressDialog.dismiss();
++++++++++++}

++++++++++++@Override
++++++++++++public+void+onError()+{
++++++++++++++++mProgressDialog.dismiss();
++++++++++++++++Toast.makeText(getActivity(),+"Download+failed",+Toast.LENGTH_LONG).show();
++++++++++++}
++++++++});|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3720709|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>mProgressDialog = new ProgressDialog(getActivity());
 mProgressDialog.setMessage("Wait a moment, loading image...");
 mProgressDialog.setCanceledOnTouchOutside(false);
 mProgressDialog.setCancelable(false);
 mProgressDialog.show();

 Picasso.with(getActivity()).load(mImagePath).into(mImageView, new Callback() {
 @Override
 public void onSuccess() {
 mProgressDialog.dismiss();
 }

 @Override
 public void onError() {
 mProgressDialog.dismiss();
 Toast.makeText(getActivity(), "Download failed", Toast.LENGTH_LONG).show();
 }
 });
</code></pre>

I am ListView and would like to show progress, until image not downloaded from server into ImageView using Picasso library, still showing ic_launcher drawable while downloading image from server into ImageView, but what if i would like to show progress

<pre><code> Picasso.with(context)
 .load(imageURL)
 .transform(transformation)
 .placeholder(R.drawable.ic_launcher)
 .error(R.drawable.ic_launcher)
 .into(viewHolder.imageView);
</code></pre>

Show Progress while downloading image from server into imageview

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我是ListView，希望显示进度，直到没有使用毕加索库从服务器下载到ImageView的图像，在从服务器下载图像到ImageView时仍然显示ic_launcher可绘制，但是如果我想显示进度呢？    Picasso.with(context)    .load(imageURL)    .transform(tr...

问在将图像从服务器下载到图像视图时显示进度
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问在将图像从服务器下载到图像视图时显示进度EN