blocks|key|200482|text|​|type|unstyled|depth|inlineStyleRanges|entityRanges|data|200483|📷|atomic|offset|length|200484|添加约束-布局的新的层次依赖关系|200485|dependencies+{
++++compile+'com.android.support.constraint:constraint-layout:1.0.0-alpha9'++
}|code-block|syntax|javascript|200486|重建这个项目。|200487|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/11e89c64d85e8a2460573ba4503e9749.png|imageAlt^0|0|0|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@$E|10|F|11|1|12]]|A|$]]|$1|G|3|H|5|6|7|13|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|14|8|@]|9|@]|A|$L|M]]|$1|N|3|O|5|6|7|15|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W|X|-4]]]]

<a href="https://i.stack.imgur.com/Kg8zj.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Kg8zj.png" alt="enter image description here"></a>Add new gradle dependency of constraint-layout

<pre><code>dependencies {
 compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha9' 
}
</code></pre>

and rebuild the project.

blocks|key|2120639|text|首先，布局文件中没有相对/线性或任何其他元素。正如我在你的组件树中看到的(左下角)是空的。解决方案是首先添加任何根元素--+Relative/Linear布局。然后，您可以在组件树(左下角)中看到根元素。右键单击in后，您将找到一个将其转换为constraint+layout的选项。然后可能会出现一个弹出窗口，检查这两个窗口，然后单击OK，然后可以使用约束布局。如果能用，请告诉我。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2120640|​|2120641|📷|atomic|2120642|2120643|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/c9c4ad4d3bae25cc7f229e85b6d39b54.png|imageAlt^0|1Q|F|3D|H|4O|2|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|K|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|M|$N|$5|O|P|Q|E|$R|S|T|-4]]]]

First of all you have no Relative / Linear or any other element in your layout file . As I am seeing in your component tree (bottom left corner) empty . The solution is first add any root element either <code>Relative/Linear</code> layout . Then you can see the the root element in you component tree (bottom left corner) . After right clicking on in you will find a option to convert it to <code>constraint layout</code> . Then a pop up window might appear , check both and click <code>OK</code> then you can use constraint layout . Let me know if it works

<a href="https://i.stack.imgur.com/3Mtou.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3Mtou.png" alt="enter image description here"></a>

blocks|key|391689|text|您必须先下载约束存储库，然后再使用它，我得到了与您相同的错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|391690|因此，打开Android，转到Tools+>+Android+>+SDK，展开Support，同时单击ConstraintLayout+for，然后应用它将开始下载。|391691|之后，将下面的代码粘贴到build.gradle(Module:app)文件依赖项块中。然后转到Tools+>+Android+>+Gradle+Files，同步项目。|391692|compile+'com.android.support.constraint:constraint-layout:1.0.0-alpha9'|offset|length|style|CODE|391693|单击此处可查看插入上述行的位置。|391694|请参考此页完成整个设置：|391695|entityMap|0|LINK|mutability|MUTABLE|url|https://i.stack.imgur.com/pVe56.png|1|https://developer.android.com/training/constraint-layout/index.html^0|0|0|0|0|1Z|0|0|G|0|0|3|2|1|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|12|8|@$H|13|I|14|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|15|8|@]|9|@$H|16|I|17|1|18]]|A|$]]|$1|N|3|O|5|6|7|19|8|@]|9|@$H|1A|I|1B|1|1C]]|A|$]]|$1|P|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W]]|X|$5|S|T|U|A|$V|Y]]]]

You'll have to download the repository for constraint before you use it, i got the same error as you have. 

So open the Android Studio and Go to Tools > Android > SDK Manager > SDK Tools and expand the Support Repository and click both ConstraintLayout for Android and Solver for ConstraintLayout and apply it'll start downloading. 

After that paste the code below to build.gradle(Module:app) file dependencies block. and then go to Tools > Android > Sync Project with Gradle Files, to sync project.

<code>compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha9' </code>

<a href="https://i.stack.imgur.com/pVe56.png" rel="nofollow noreferrer">Click to see where to insert the above line</a>

Refer <a href="https://developer.android.com/training/constraint-layout/index.html" rel="nofollow noreferrer">this page</a> to do entire setup:

I am trying to use Constraint Layout in Android Studio 2.2.

I have installed Android 2.2 studio 

I have added the latest Constraint Layout lib in apps gradle and build successfully. 

compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha8'

Now when I try to drag and drop the widgets from the palette to android layout editor, It is not rending to editor and showing the following error.

java.lang.NoClassDefFoundError: android/support/constraint/R$styleable
 at android.support.constraint.ConstraintLayout$LayoutParams.(ConstraintLayout.java:1180)

Here I am adding the snapshot for the same for better understanding. 

what else I am missing here. please help.

Additional Information:

1.Windows 7 OS

2.64 Bit

Build.gradle:

android {
 compileSdkVersion 23
 buildToolsVersion "23.0.2"

<pre><code>defaultConfig {
 applicationId "meterial.example.com.floatingactionbutton"
 minSdkVersion 15
 targetSdkVersion 23
 versionCode 1
 versionName "1.0"
}
buildTypes {
 release {
 minifyEnabled false
 proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 }
}
</code></pre>

}

<a href="https://i.stack.imgur.com/Z6omR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Z6omR.png" alt="enter image description here"></a>

Rendering Problems: Android Studio 2.2 - Constraint Layout

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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我试图在AndroidStudio2.2中使用约束布局。我已经安装了Android2.2工作室我在应用程序中添加了最新的约束布局库，并成功地进行了构建。'com.android.support.constraint:constraint-layout:1.0.0-alpha8'编译现在，当我尝试将小部件从调色板拖放到a...

问呈现问题:AndroidStudio2.2-约束布局
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