blocks|key|4604834|text|这对我来说很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4604835|compile+'com.android.support:recyclerview-v7:21.0.0-rc1'|code-block|syntax|javascript|4604836|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|$]]

This works for me: 

<pre><code>compile 'com.android.support:recyclerview-v7:21.0.0-rc1'
</code></pre>

blocks|key|4604845|text|我想通了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4604846|您必须添加以下gradle依赖项：|4604847|compile+'com.android.support:recyclerview-v7:%2B'|code-block|syntax|javascript|4604848|我编译的另一个问题是compileSdkVersion。显然，您必须针对android-L编译它|offset|length|style|CODE|4604849|您的build.gradle文件应如下所示：|4604850|apply+plugin:+'android'
android+{
++++compileSdkVersion+'android-L'
++++buildToolsVersion+'19.1.0'
++++[...]
}
dependencies+{
++++compile+fileTree(dir:+'libs',+include:+['*.jar'])
++++compile+'com.android.support:recyclerview-v7:%2B'
}|4604851|entityMap^0|0|0|0|A|H|10|9|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@$K|Y|L|Z|M|N]|$K|10|L|11|M|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|12|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|13|8|@]|9|@]|A|$G|H]]|$1|S|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|T|$]]

Figured it out.

You'll have to add the following gradle dependency :

<pre><code>compile 'com.android.support:recyclerview-v7:+'
</code></pre>

another issue I had compiling was the <code>compileSdkVersion</code>. Apparently you'll have to compile it against <code>android-L</code>

Your build.gradle file should look something like this:

<pre><code>apply plugin: 'android'
android {
 compileSdkVersion 'android-L'
 buildToolsVersion '19.1.0'
 [...]
}
dependencies {
 compile fileTree(dir: 'libs', include: ['*.jar'])
 compile 'com.android.support:recyclerview-v7:+'
}
</code></pre>

blocks|key|4604878|text|RecyclerViewLib是将RecyclerView导入到项目中的一种好方法。这是一个开源库，它去掉了RecyclerView，使其安全且易于实现。你可以阅读作者的博客文章here。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4604879|在您的代码中添加以下行作为gradle依赖项：|4604880|dependencies+{
++++compile+'com.twotoasters.RecyclerViewLib:library:1.0.%2B@aar'
}|code-block|syntax|javascript|4604881|有关如何引入gradle依赖项的更多信息：|4604882|波士尼亚，你说得对，那很烦人。Gradle可能看起来很复杂，但它非常强大和灵活。一切都是用语言来完成的，学习gradle系统就是学习另一种语言，这样你就可以构建你的Android应用程序了。现在很痛，但从长远来看，你会喜欢它的。|4604883|查看同一个应用程序的build.gradle。执行以下操作的https://github.com/twotoasters/RecyclerViewLib/blob/master/sample/build.gradle是它将库引入模块(也称为示例应用程序)的位置。|4604884|compile+(project+(':library'))+{
++++exclude+group:+'com.android.support',+module:+'support-v4'+
}|4604885|注意这个文件的位置。这不是顶级build.gradle|4604886|因为lib源代码在同一个项目中，所以它能够使用简单的':library'来实现这一点。exclude告知库使用示例应用程序的支持v4。这不是必须的，但这是一个好主意。你没有或者不想在你的项目中拥有lib的源代码，所以你必须在互联网上找到它。在模块的/应用程序的build.gradle中，您应该将该答案开头的那一行放在相同的位置。或者，如果遵循示例示例，您可以用'+com.twotoasters.RecyclerViewLib:library:1.0.%2B@aar+'替换':library'并使用excludes。|style|CODE|4604887|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/twotoasters/RecyclerViewLib|1|http://toastdroid.com/2014/09/03/unlocking-recyclerview/|2|https://github.com/twotoasters/RecyclerViewLib/blob/master/sample/build.gradle^0|0|F|0|2H|4|1|0|0|0|0|0|U|26|2|0|0|0|Q|A|17|7|51|1H|6K|A|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@$A|1B|B|1C|1|1D]|$A|1E|B|1F|1|1G]]|C|$]]|$1|D|3|E|5|6|7|1H|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|1I|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|1J|8|@]|9|@]|C|$]]|$1|M|3|N|5|6|7|1K|8|@]|9|@]|C|$]]|$1|O|3|P|5|6|7|1L|8|@]|9|@$A|1M|B|1N|1|1O]]|C|$]]|$1|Q|3|R|5|H|7|1P|8|@]|9|@]|C|$I|J]]|$1|S|3|T|5|6|7|1Q|8|@]|9|@]|C|$]]|$1|U|3|V|5|6|7|1R|8|@$A|1S|B|1T|W|X]|$A|1U|B|1V|W|X]|$A|1W|B|1X|W|X]|$A|1Y|B|1Z|W|X]]|9|@]|C|$]]|$1|Y|3|-4|5|6|7|20|8|@]|9|@]|C|$]]]|Z|$10|$5|11|12|13|C|$14|15]]|16|$5|11|12|13|C|$14|17]]|18|$5|11|12|13|C|$14|19]]]]

A great way to import the RecyclerView into your project is the <a href="https://github.com/twotoasters/RecyclerViewLib" rel="nofollow">RecyclerViewLib</a>. This is an open source library which pulled out the RecyclerView to make it safe and easy implement. You can read the author's blog post <a href="http://toastdroid.com/2014/09/03/unlocking-recyclerview/" rel="nofollow">here</a>.

Add the following line as a gradle dependency in your code:

<pre><code>dependencies {
 compile 'com.twotoasters.RecyclerViewLib:library:1.0.+@aar'
}
</code></pre>

More info for how to bring in gradle dependencies:

Bosnia you're right about that being annoying. Gradle may seem complicated but it is extremely powerful and flexible. Everything is done in the language groovy and learning the gradle system is learning another language just so you can build your Android app. It hurts now, but in the long run you'll love it. 

Check out the build.gradle for the same app. <a href="https://github.com/twotoasters/RecyclerViewLib/blob/master/sample/build.gradle" rel="nofollow">https://github.com/twotoasters/RecyclerViewLib/blob/master/sample/build.gradle</a> Where it does the following is where it brings the lib into the module (aka the sample app) 

<pre><code>compile (project (':library')) {
 exclude group: 'com.android.support', module: 'support-v4' 
}
</code></pre>

Pay attention to the location of this file. This is not the top level build.gradle

Because the lib source is in the same project it is able to do this with the simple <code>':library'</code>. The <code>exclude</code> tells the lib to use the sample app's support v4. That isn't necessary but is a good idea. You don't have or want to have the lib's source in your project, so you have to point to the internet for it. In your module's/app's build.gradle you would put that line from the beginning of this answer in the same location. Or, if following the samples example, you could replace <code>':library'</code> with <code>' com.twotoasters.RecyclerViewLib:library:1.0.+@aar '</code> and use the excludes.

blocks|key|98568|text|我用下面的几行代码创建的，这对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|98569|implementation+'com.android.support:appcompat-v7:28.0.0'
implementation+'com.android.support:recyclerview-v7:28.0.0'|code-block|syntax|javascript|98570|对于AndroidX|98571|implementation+'androidx.recyclerview:recyclerview:1.1.0'
implementation+'androidx.cardview:cardview:1.0.0'|98572|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|$]]

I have created using following lines and this works for me.
<pre><code>implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:recyclerview-v7:28.0.0'
</code></pre>
For AndroidX
<pre><code>implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'androidx.cardview:cardview:1.0.0'
</code></pre>

blocks|key|98579|text|import+android.support.v7.widget.RecyclerView;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|98580|在Android+Studio中，导入并不像人们希望的那样直观。试着导入这个比特，看看它有什么帮助！|unstyled|98581|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>import android.support.v7.widget.RecyclerView;
</code></pre>

In Android Studio, importing is not as intuitive as one would hope. Try importing this bit and see how it helps!

blocks|key|98591|text|dependencies+{
compile+fileTree(dir:+'libs',+include:+['*.jar'])
compile+'com.android.support:appcompat-v7:21.0.3'
compile+'com.android.support:recyclerview-v7:21.0.0'
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|98592|只要让你的依赖像上面那样放在build.gradle文件中，对我来说很有效。|unstyled|98593|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:21.0.3'
compile 'com.android.support:recyclerview-v7:21.0.0'
}
</code></pre>

Just make your dependencies like above in build.gradle file, worked for me.

blocks|key|4604978|text|在我的例子中，我通过将compile+'com.android.support:recyclerview-v7:22.0.0'作为依赖项放入gradle构建中修复了它|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4604979|(+Android+studio+v1.2.1.1和所有sdk已更新。)|4604980|当代码更新如此之快，并且IDE无法跟踪它们时，您必须手动修复它们，浪费时间和资源，这真的很烦人。|4604981|但是，它最终还是起作用了。|4604982|entityMap^0|B|1G|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|S|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|M|$]]

in my case I fixed it by putting <code>compile 'com.android.support:recyclerview-v7:22.0.0'</code> as a dependency into my gradle build

(with Android studio v. 1.2.1.1 and all sdk's updated.)

It's really annoying when codes are updated so fast and the IDE can't keep track of them, and you have to manually fix for them, wasting time and resources.

But well, at last it works.

blocks|key|98673|text|如果有人仍然有这个问题-你不需要改变compileSdkVersion，这只是违背了支持库的全部目的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|98674|相反，请在gradle.build文件中使用以下内容：|98675|compile+'com.android.support:cardview-v7:%2B'
compile+'com.android.support:recyclerview-v7:%2B'
compile+'com.android.support:palette-v7:%2B'`|code-block|syntax|javascript|98676|entityMap^0|I|H|0|5|C|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

If anyone still has this issue - you don't have to change <code>compileSdkVersion</code>, this just defeats the whole purpose of support libraries. 

Instead, use these in your <code>gradle.build</code> file:

<pre><code>compile 'com.android.support:cardview-v7:+'
compile 'com.android.support:recyclerview-v7:+'
compile 'com.android.support:palette-v7:+'`
</code></pre>

blocks|key|98706|text|现在可以通过在app+gradle中编译设计依赖来添加RecyclerView：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|98707|dependencies+{
...
compile+'com.android.support:design:24.0.0'
}|code-block|syntax|javascript|98708|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|$]]

RecyclerView can now be added by compiling design dependency in app gradle:

<pre><code>dependencies {
...
compile 'com.android.support:design:24.0.0'
}
</code></pre>

blocks|key|4605067|text|compile+'com.android.support:recyclerview-v7:24.2.1'|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4605068|这对我很有效。试试看。|unstyled|4605069|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>compile 'com.android.support:recyclerview-v7:24.2.1'
</code></pre>

This works for me.
Try it.

blocks|key|4605134|text|将依赖项包含在build.gradle中，并将项目与gradle文件同步|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4605135|dependencies+{
++++implementation+fileTree(dir:+'libs',+include:+['*.jar'])
++++implementation+'com.android.support:appcompat-v7:25.1.0'

++++//include+the+revision+no,+i.e+25.1.1
++++implementation+'com.android.support:recyclerview-v7:25.1.1'
}|code-block|syntax|javascript|4605136|包含修订版(这里是25.1.1)为了避免不可预测的构建，请查看library+revisions|4605137|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/topic/libraries/support-library/revisions.html^0|7|C|Q|6|0|0|V|H|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@$9|11|A|12|1|13]]|E|$]]|$1|M|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

include the dependency in the <code>build.gradle</code>, and sync the project with <code>gradle</code> files

<pre><code>dependencies {
 implementation fileTree(dir: 'libs', include: ['*.jar'])
 implementation 'com.android.support:appcompat-v7:25.1.0'

 //include the revision no, i.e 25.1.1
 implementation 'com.android.support:recyclerview-v7:25.1.1'
}
</code></pre>

Include the revision(here its 25.1.1) to avoid unpredictable builds, check <a href="https://developer.android.com/topic/libraries/support-library/revisions.html" rel="nofollow noreferrer">library revisions</a>

blocks|key|4605170|text|我用的这个对我来说很有效。有一件事需要考虑，那就是你使用的是什么appcompat版本。我使用的是appcompat-v7:26.%2B，所以这对我很有效。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4605171|implementation+'com.android.support:recyclerview-v7:26.%2B'|code-block|syntax|javascript|4605172|entityMap^0|W|9|1D|H|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

I used this one is working for me. One thing needs to be consider that what <code>appcompat</code> version you are using. I am using <code>appcompat-v7:26.+</code> so this is working for me.

<pre><code>implementation 'com.android.support:recyclerview-v7:26.+'
</code></pre>

blocks|key|4605207|text|这对我很管用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4605208|定义internet权限|4605209|+<uses-permission+android:name="android.permission.INTERNET"+>|code-block|syntax|javascript|4605210|添加依赖关系|4605211|compile+'com.squareup.retrofit2:retrofit:2.1.0'
++++compile+'com.google.code.gson:gson:2.6.2'
++++compile+'com.squareup.retrofit2:converter-gson:2.1.0'
++++compile+'com.google.code.gson:gson:2.6.2'
++++compile+'com.squareup.retrofit2:converter-gson:2.1.0'
++++compile+'com.squareup.okhttp3:logging-interceptor:3.4.1'
++++compile+'com.squareup.okhttp3:okhttp:3.4.1'
++++compile+'com.squareup.retrofit2:retrofit:2.1.0'
++++compile+('com.squareup.retrofit2:converter-simplexml:2.1.0'){
++++++++exclude+group:+'stax',+module:+'stax-api'
++++++++exclude+group:+'stax',+module:+'stax'
++++++++exclude+group:+'xpp3',+module:+'xpp3'
++++}|4605212|在主要活动中|4605213|import+android.support.v7.app.AppCompatActivity;
import+android.os.Bundle;
import+android.util.Log;
import+android.widget.TextView;
import+android.widget.Toast;

import+java.util.List;

import+retrofit2.Call;
import+retrofit2.Callback;
import+retrofit2.Response;
import+retrofit2.Retrofit;
import+retrofit2.converter.simplexml.SimpleXmlConverterFactory;

public+class+MainActivity+extends+AppCompatActivity+{
++++private+BreakfastMenu+breakfastMenu;
++++List<BreakfastMenu>+list;
++++TextView+responseText;
++++APIInterface+apiInterface;
++++String+name;
++++String+price;
++++@Override
++++protected+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.activity_main);
++++++++responseText=(TextView)findViewById(R.id.reponseText);
++++++++apiInterface+=+APIClient.getClient().create(APIInterface.class);


++++++++/**
+++++++++GET+List+Resources
+++++++++**/
++++++++Call<BreakfastMenu>+call+=+apiInterface.getBreakfastMenu();
++++++++call.enqueue(new+Callback<BreakfastMenu>()+{
++++++++++++@Override
++++++++++++public+void+onResponse(Call<BreakfastMenu>+call,+Response<BreakfastMenu>+response)+{
+++++++++++++++Log.d("TAG",+response.code()+%2B+"");

++++++++++++++++String+displayResponse+=+"";
++++++++++++++++BreakfastMenu+resource+=+response.body();
++++++++++++++++System.out.println(displayResponse%2B"display+response+++");

++++++++++++++++for+(Food+food+:+resource.getFoodList())
++++++++++++++++{
++++++++++++++++++++name=food.getName();
++++++++++++++++++++price=food.getPrice();
++++++++++++++++++++System.out.println(name%2Bprice%2B"=========================================");
++++++++++++++++++++displayResponse+%2B=+food.getName()+%2B+"+"+%2B+food.getPrice()%2B"\n"%2B"\n";
++++++++++++++++++++Toast.makeText(MainActivity.this,name%2Bprice,Toast.LENGTH_LONG).show();
++++++++++++++++}
++++++++++++++++responseText.setText(displayResponse);

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

++++++++++++@Override
++++++++++++public+void+onFailure(Call<BreakfastMenu>+call,+Throwable+t)+{
++++++++++++++++call.cancel();
++++++++++++}
++++++++});

++++}
}|4605214|创建APIClient.java类|4605215|import+okhttp3.OkHttpClient;
import+okhttp3.logging.HttpLoggingInterceptor;
import+retrofit2.Retrofit;
import+retrofit2.converter.gson.GsonConverterFactory;
import+retrofit2.converter.simplexml.SimpleXmlConverterFactory;

class+APIClient+{

++++private+static+Retrofit+retrofit+=+null;

++++static+Retrofit+getClient()+{

++++++++HttpLoggingInterceptor+interceptor+=+new+HttpLoggingInterceptor();
++++++++interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
++++++++OkHttpClient+client+=+new+OkHttpClient.Builder().addInterceptor(interceptor).build();


++++++++retrofit+=+new+Retrofit.Builder()
++++++++++++++++.baseUrl("https://www.w3schools.com/")
++++++++++++++++.addConverterFactory(SimpleXmlConverterFactory.create())
++++++++++++++++.build();



++++++++return+retrofit;
++++}

}

++++enter+code+here

Make+APIInterface.java

import+retrofit2.Call;
import+retrofit2.http.Body;
import+retrofit2.http.Field;
import+retrofit2.http.FormUrlEncoded;
import+retrofit2.http.GET;
import+retrofit2.http.Headers;
import+retrofit2.http.POST;
import+retrofit2.http.Query;

interface+APIInterface+{

++++@GET("xml/simple.xml")
++++@Headers({"Accept:+application/xml",
++++++++++++"User-Agent:+Retrofit-Sample-App"})
++++Call<BreakfastMenu>+getBreakfastMenu();
}

In+BreakfastMenu.java

import+org.simpleframework.xml.ElementList;
import+org.simpleframework.xml.Root;

import+java.util.List;

@Root(name+=+"breakfast_menu")
public+class+BreakfastMenu
{

++++@ElementList(inline+=+true)
++++private+List<Food>+foodList;

++++public+BreakfastMenu()
++++{
++++}

++++public+List<Food>+getFoodList()
++++{
++++++++return+foodList;
++++}

++++public+void+setFoodList(List<Food>+foodList)
++++{
++++++++this.foodList+=+foodList;
++++}
}|4605216|创建Food.java|4605217|import+org.simpleframework.xml.Element;
import+org.simpleframework.xml.Root;

@Root(name+=+"food")
public+class+Food
{

++++@Element(name+=+"name")
++++private+String+name;

++++@Element(name+=+"price")
++++private+String+price;

++++@Element(name+=+"description")
++++private+String+description;

++++@Element(name+=+"calories")
++++private+String+calories;

++++public+Food()
++++{
++++}

++++public+String+getName()
++++{
++++++++return+name;
++++}

++++public+void+setName(String+name)
++++{
++++++++this.name+=+name;
++++}

++++public+String+getPrice()
++++{
++++++++return+price;
++++}

++++public+void+setPrice(String+price)
++++{
++++++++this.price+=+price;
++++}

++++public+String+getDescription()
++++{
++++++++return+description;
++++}

++++public+void+setDescription(String+description)
++++{
++++++++this.description+=+description;
++++}

++++public+String+getCalories()
++++{
++++++++return+calories;
++++}

++++public+void+setCalories(String+calories)
++++{
++++++++this.calories+=+calories;
++++}
}|4605218|在activity_main.xml中|4605219|<LinearLayout+xmlns:android="http://schemas.android.com/apk/res/android"
++++android:layout_width="fill_parent"
++++android:layout_height="fill_parent"+>

++++++++<TextView
++++++++++++android:id="@%2Bid/reponseText"
++++++++++++android:layout_width="match_parent"
++++++++++++android:layout_height="600dp"
++++++++++/>


</Linear+Layout>|4605220|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|18|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|1A|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|1C|8|@]|9|@]|A|$G|H]]|$1|U|3|V|5|6|7|1D|8|@]|9|@]|A|$]]|$1|W|3|X|5|F|7|1E|8|@]|9|@]|A|$G|H]]|$1|Y|3|Z|5|6|7|1F|8|@]|9|@]|A|$]]|$1|10|3|11|5|F|7|1G|8|@]|9|@]|A|$G|H]]|$1|12|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|13|$]]

This works for me

Define internet permission

<pre><code> &lt;uses-permission android:name="android.permission.INTERNET" &gt;
</code></pre>

Add dependency

<pre><code>compile 'com.squareup.retrofit2:retrofit:2.1.0'
 compile 'com.google.code.gson:gson:2.6.2'
 compile 'com.squareup.retrofit2:converter-gson:2.1.0'
 compile 'com.google.code.gson:gson:2.6.2'
 compile 'com.squareup.retrofit2:converter-gson:2.1.0'
 compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'
 compile 'com.squareup.okhttp3:okhttp:3.4.1'
 compile 'com.squareup.retrofit2:retrofit:2.1.0'
 compile ('com.squareup.retrofit2:converter-simplexml:2.1.0'){
 exclude group: 'stax', module: 'stax-api'
 exclude group: 'stax', module: 'stax'
 exclude group: 'xpp3', module: 'xpp3'
 }
</code></pre>

In Main Activity

<pre><code>import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;
import retrofit2.Retrofit;
import retrofit2.converter.simplexml.SimpleXmlConverterFactory;

public class MainActivity extends AppCompatActivity {
 private BreakfastMenu breakfastMenu;
 List&lt;BreakfastMenu&gt; list;
 TextView responseText;
 APIInterface apiInterface;
 String name;
 String price;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 responseText=(TextView)findViewById(R.id.reponseText);
 apiInterface = APIClient.getClient().create(APIInterface.class);


 /**
 GET List Resources
 **/
 Call&lt;BreakfastMenu&gt; call = apiInterface.getBreakfastMenu();
 call.enqueue(new Callback&lt;BreakfastMenu&gt;() {
 @Override
 public void onResponse(Call&lt;BreakfastMenu&gt; call, Response&lt;BreakfastMenu&gt; response) {
 Log.d("TAG", response.code() + "");

 String displayResponse = "";
 BreakfastMenu resource = response.body();
 System.out.println(displayResponse+"display response ");

 for (Food food : resource.getFoodList())
 {
 name=food.getName();
 price=food.getPrice();
 System.out.println(name+price+"=========================================");
 displayResponse += food.getName() + " " + food.getPrice()+"\n"+"\n";
 Toast.makeText(MainActivity.this,name+price,Toast.LENGTH_LONG).show();
 }
 responseText.setText(displayResponse);

 }

 @Override
 public void onFailure(Call&lt;BreakfastMenu&gt; call, Throwable t) {
 call.cancel();
 }
 });

 }
}
</code></pre>

Make APIClient.java class

<pre><code>import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
import retrofit2.converter.simplexml.SimpleXmlConverterFactory;

class APIClient {

 private static Retrofit retrofit = null;

 static Retrofit getClient() {

 HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
 interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
 OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();


 retrofit = new Retrofit.Builder()
 .baseUrl("https://www.w3schools.com/")
 .addConverterFactory(SimpleXmlConverterFactory.create())
 .build();



 return retrofit;
 }

}

 enter code here

Make APIInterface.java

import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.Field;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.GET;
import retrofit2.http.Headers;
import retrofit2.http.POST;
import retrofit2.http.Query;

interface APIInterface {

 @GET("xml/simple.xml")
 @Headers({"Accept: application/xml",
 "User-Agent: Retrofit-Sample-App"})
 Call&lt;BreakfastMenu&gt; getBreakfastMenu();
}

In BreakfastMenu.java

import org.simpleframework.xml.ElementList;
import org.simpleframework.xml.Root;

import java.util.List;

@Root(name = "breakfast_menu")
public class BreakfastMenu
{

 @ElementList(inline = true)
 private List&lt;Food&gt; foodList;

 public BreakfastMenu()
 {
 }

 public List&lt;Food&gt; getFoodList()
 {
 return foodList;
 }

 public void setFoodList(List&lt;Food&gt; foodList)
 {
 this.foodList = foodList;
 }
}
</code></pre>

Make Food.java

<pre><code>import org.simpleframework.xml.Element;
import org.simpleframework.xml.Root;

@Root(name = "food")
public class Food
{

 @Element(name = "name")
 private String name;

 @Element(name = "price")
 private String price;

 @Element(name = "description")
 private String description;

 @Element(name = "calories")
 private String calories;

 public Food()
 {
 }

 public String getName()
 {
 return name;
 }

 public void setName(String name)
 {
 this.name = name;
 }

 public String getPrice()
 {
 return price;
 }

 public void setPrice(String price)
 {
 this.price = price;
 }

 public String getDescription()
 {
 return description;
 }

 public void setDescription(String description)
 {
 this.description = description;
 }

 public String getCalories()
 {
 return calories;
 }

 public void setCalories(String calories)
 {
 this.calories = calories;
 }
}
</code></pre>

In activity_main.xml

<pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent" &gt;

 &lt;TextView
 android:id="@+id/reponseText"
 android:layout_width="match_parent"
 android:layout_height="600dp"
 /&gt;


&lt;/Linear Layout&gt;
</code></pre>

blocks|key|98860|text|只需要更新一下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|98861|‘'compile’现在已经过时了；它已经被'implementation‘和'api’所取代。我相信它将在2018年年底被移除。有关更多信息，请参阅：http://d.android.com/r/tools/update-dependency-configurations.html|offset|length|98862|此外，所有的com.android.support库必须使用完全相同的版本规范；此外，支持库(如appcompat-v7和recyclerview+v7)不应该使用与compileSdkVersion不同的版本。|98863|entityMap|0|LINK|mutability|MUTABLE|url|http://d.android.com/r/tools/update-dependency-configurations.html^0|0|24|1U|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

Just an update:

'compile' is obsolete now; it has been replaced with 'implementation' and 'api'.
It will be removed at the end of 2018 I believe. For more information see: <a href="http://d.android.com/r/tools/update-dependency-configurations.html" rel="nofollow noreferrer">http://d.android.com/r/tools/update-dependency-configurations.html</a>

Also all com.android.support libraries must use the exact same version specification; in addition, support libraries such as appcompat-v7 and recyclerview-v7 should not use a different version than the compileSdkVersion.

blocks|key|98896|text|如果您使用的是Android+Studio的更新或2018版本...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|98897|compile+'com.android.support:recyclerview-v7:%2B'|code-block|syntax|javascript|98898|将给您一个错误，并显示以下消息："Configuration+'compile‘已过时，已替换为'implementation’和'api‘，将于2018年底移除。“|98899|试着使用这个|98900|implementation+'com.android.support:recyclerview-v7:%2B'|98901|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

If you using the updated or 2018 Version for Android Studio...

<pre><code>compile 'com.android.support:recyclerview-v7:+'
</code></pre>

will give you an error with following message
"Configuration 'compile' is obsolete and has been replaced with 'implementation' and 'api'.
It will be removed at the end of 2018."

Try using this 

<pre><code>implementation 'com.android.support:recyclerview-v7:+'
</code></pre>

Trying to use the new RecyclerView from the support library. I downloaded the 20 update for the support library using the SDK manager.

I've added the jar file to the libs folder - and added to build path - no luck using the RecyclerView.

Tried to use also the gradle dependency according to <a href="http://developer.android.com/preview/tv/start/index.html">Android Developer's API</a> - not sure if this is the right place to look - this page is related more to AndroidTV :

<pre><code> com.android.support:recyclerview-v7:20.0.+
</code></pre>

Cannot gradle sync the project.

Any ideas?

How to import RecyclerView for Android L-preview

Android Studio

Android

正在尝试使用支持库中的新RecyclerView。我使用SDK管理器下载了支持库的20更新。我已经将jar文件添加到libs文件夹-并添加到构建路径-但使用RecyclerView失败了。尝试根据使用gradle依赖--不确定这是否是合适的地方--这个页面更多地与AndroidTV相关： com.android.sup...

问如何导入RecyclerView for Android L-preview
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