blocks|key|4608745|text|由于毕加索2.5.0+OkHttpDownloader类已更改，假设您使用的是OkHttp3+(以及picasso2-okhttp3-downloader)，因此您必须执行以下操作：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4608746|OkHttpClient+client+=+new+OkHttpClient.Builder()
++++++++.addInterceptor(new+Interceptor()+{
++++++++++++@Override
++++++++++++public+Response+intercept(Chain+chain)+throws+IOException+{
++++++++++++++++Request+newRequest+=+chain.request().newBuilder()
++++++++++++++++++++++++.addHeader("X-TOKEN",+"VAL")
++++++++++++++++++++++++.build();
++++++++++++++++return+chain.proceed(newRequest);
++++++++++++}
++++++++})
++++++++.build();

Picasso+picasso+=+new+Picasso.Builder(context)
++++++++.downloader(new+OkHttp3Downloader(client))
++++++++.build();|code-block|syntax|javascript|4608747|来源：https://github.com/square/picasso/issues/900|4608748|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/JakeWharton/picasso2-okhttp3-downloader|1|https://github.com/square/picasso/issues/900^0|B|G|1E|R|0|0|0|3|18|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|M|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]]]

Since Picasso 2.5.0 <code>OkHttpDownloader</code> class has been changed, assuming you are using OkHttp3 (and so <a href="https://github.com/JakeWharton/picasso2-okhttp3-downloader">picasso2-okhttp3-downloader</a>), so you have to do something like this:

<pre><code>OkHttpClient client = new OkHttpClient.Builder()
 .addInterceptor(new Interceptor() {
 @Override
 public Response intercept(Chain chain) throws IOException {
 Request newRequest = chain.request().newBuilder()
 .addHeader("X-TOKEN", "VAL")
 .build();
 return chain.proceed(newRequest);
 }
 })
 .build();

Picasso picasso = new Picasso.Builder(context)
 .downloader(new OkHttp3Downloader(client))
 .build();
</code></pre>

Source: <a href="https://github.com/square/picasso/issues/900">https://github.com/square/picasso/issues/900</a>

blocks|key|4608799|text|这样一种简单的方式将保留默认的OkHttpClient超时和缓存配置：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4608800|private+class+MyOkHttpDownloader+extends+OkHttpDownloader+{

++++public+MyOkHttpDownloader(final+Context+context)+{
++++++++super(context);
++++++++getClient().interceptors().add(new+Interceptor()+{
++++++++++++@Override
++++++++++++public+Response+intercept(Chain+chain)+throws+IOException+{
++++++++++++++++Request+newRequest+=+chain.request().newBuilder()
++++++++++++++++++++++++.addHeader("X-TOKEN",+"VAL")
++++++++++++++++++++++++.build();
++++++++++++++++return+chain.proceed(newRequest);
++++++++++++}
++++++++});
++++}
}

Picasso+picasso+=+new+Picasso.Builder(context).downloader(new+MyOkHttpDownloader(context)).build();|code-block|syntax|javascript|4608801|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|$]]

A simple way like this will keep default OkHttpClient timeout and cache configurations:

<pre><code>private class MyOkHttpDownloader extends OkHttpDownloader {

 public MyOkHttpDownloader(final Context context) {
 super(context);
 getClient().interceptors().add(new Interceptor() {
 @Override
 public Response intercept(Chain chain) throws IOException {
 Request newRequest = chain.request().newBuilder()
 .addHeader("X-TOKEN", "VAL")
 .build();
 return chain.proceed(newRequest);
 }
 });
 }
}

Picasso picasso = new Picasso.Builder(context).downloader(new MyOkHttpDownloader(context)).build();
</code></pre>

blocks|key|102307|text|您还可以按照documentation+of+OkHttp中的建议添加身份验证|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|102308|只需添加此客户端|102309|final+OkHttpClient+client+=+new+OkHttpClient.Builder()
++++++++++++++++.authenticator(new+Authenticator()+{
++++++++++++++++++++@Override
++++++++++++++++++++public+Request+authenticate(Route+route,+Response+response)+throws+IOException+{
++++++++++++++++++++++++String+credential+=+okhttp3.Credentials.basic("user",+"pw");
++++++++++++++++++++++++return+response.request().newBuilder()
++++++++++++++++++++++++++++++++.header("Authorization",+credential)
++++++++++++++++++++++++++++++++.build();
++++++++++++++++++++}
++++++++++++++++})
++++++++++++++++.build();|code-block|syntax|javascript|102310|对毕加索这样说：|102311|final+Picasso+picasso+=+new+Picasso.Builder(this)
++++++++++++++++.downloader(new+OkHttp3Downloader(client))
++++++++++++++++.build();
Picasso.setSingletonInstance(picasso);|102312|唯一需要的依赖项是：|102313|compile+'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.2'|102314|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/square/okhttp/wiki/Recipes#handling-authentication^0|6|N|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|D|3|E|5|6|7|14|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|15|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|16|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|17|8|@]|9|@]|C|$I|J]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|C|$]]|$1|Q|3|R|5|H|7|19|8|@]|9|@]|C|$I|J]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|T|$U|$5|V|W|X|C|$Y|Z]]]]

You can also add Authentication as suggested in the <a href="https://github.com/square/okhttp/wiki/Recipes#handling-authentication" rel="nofollow">documentation of OkHttp</a>

Just add this client

<pre><code>final OkHttpClient client = new OkHttpClient.Builder()
 .authenticator(new Authenticator() {
 @Override
 public Request authenticate(Route route, Response response) throws IOException {
 String credential = okhttp3.Credentials.basic("user", "pw");
 return response.request().newBuilder()
 .header("Authorization", credential)
 .build();
 }
 })
 .build();
</code></pre>

to Picasso like this: 

<pre><code>final Picasso picasso = new Picasso.Builder(this)
 .downloader(new OkHttp3Downloader(client))
 .build();
Picasso.setSingletonInstance(picasso);
</code></pre>

The only dependency needed is: 

<pre><code>compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.0.2'
</code></pre>

blocks|key|102326|text|它起作用了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|102327|++++++++OkHttpClient+okHttpClient+=+new+OkHttpClient.Builder()
+++++++++++++++++++++++++++.authenticator(new+Authenticator()
+++++++++++++++++++++++++++{
+++++++++++++++++++++++++++++++@Override
+++++++++++++++++++++++++++++++public+Request+authenticate(Route+route,+Response+response)+throws+IOException
+++++++++++++++++++++++++++++++{
+++++++++++++++++++++++++++++++++++String+credential+=++Credentials.basic("username","password");
+++++++++++++++++++++++++++++++++++return+response.request().newBuilder()
+++++++++++++++++++++++++++++++++++++++++++.header("Authorization",+credential)
+++++++++++++++++++++++++++++++++++++++++++.build();
+++++++++++++++++++++++++++++++}
+++++++++++++++++++++++++++}).build();

+++++++++++++++++++Picasso+picasso+=+new+Picasso.Builder(OnDemandImageCaptureActivity.this)
+++++++++++++++++++++++++++.downloader(new+OkHttp3Downloader(okHttpClient))
+++++++++++++++++++++++++++.build();
++++++++++++++++++++++++picasso.load("http://example.com/abc.jpeg").into(ivcamera);|code-block|syntax|javascript|102328|依赖关系：|102329|compile+'com.squareup.picasso:picasso:2.5.2'
compile+'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.1.0'|102330|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

It's working

<pre><code> OkHttpClient okHttpClient = new OkHttpClient.Builder()
 .authenticator(new Authenticator()
 {
 @Override
 public Request authenticate(Route route, Response response) throws IOException
 {
 String credential = Credentials.basic("username","password");
 return response.request().newBuilder()
 .header("Authorization", credential)
 .build();
 }
 }).build();

 Picasso picasso = new Picasso.Builder(OnDemandImageCaptureActivity.this)
 .downloader(new OkHttp3Downloader(okHttpClient))
 .build();
 picasso.load("http://example.com/abc.jpeg").into(ivcamera);
</code></pre>

dependency:

<pre><code>compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.jakewharton.picasso:picasso2-okhttp3-downloader:1.1.0'
</code></pre>

I have tried setting a custom OkHttpClient with a custom Authenticator, however as the doc says: "Responds to authentication challenges from the remote web or proxy server." I have to make 2 requests for each image, and that is not ideal.

Is there a request interceptor like Retrofit does? Or am I missing something in the OkHttpClient?

I'm using the latest versions:

<pre><code>compile 'com.squareup.picasso:picasso:2.3.2'
compile 'com.squareup.okhttp:okhttp:2.0.+'
compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.+'
compile 'com.squareup.okio:okio:1.0.0'
</code></pre>

Thanks!

Android Picasso library, How to add authentication headers?

身份验证

服务器

我已经尝试使用自定义验证器设置自定义OkHttpClient，但是正如文档所说：“响应来自远程web或代理服务器的身份验证挑战。”我必须为每个图像做2个请求，这并不理想。有没有像Retrofit那样的请求拦截器？还是我在OkHttpClient中遗漏了什么？我使用的是最新版本：compile 'com.squareup...

问Android Picasso库，如何添加身份验证头？
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