blocks|key|4603991|text|这样做的问题是jre版本不同。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4603992|我在系统中都安装了java+6+and+8，所以我卸载了java6，只设置了java8的路径。|offset|length|style|CODE|4603993|但请记住在设置路径后重新启动系统。|4603994|现在，查看android+L+Preview时出现的错误消失了|4603995|entityMap^0|0|9|C|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

The problem for that is having different jre versions

I have <code>java 6 and 8</code> both installed in my system, so I uninstalled java 6 and set path for only java 8.

But remember to restart the system after setting the paths.

Now error is gone while viewing android L Preview

blocks|key|97712|text|请注意屏幕上方的Android图标|type|unstyled|depth|inlineStyleRanges|entityRanges|data|97713|​|97714|📷|atomic|offset|length|97715|97716|此图标位于此屏幕的上侧：|97717|97718|97719|97720|它可能会显示数字20。这是使用API+20渲染窗口的选项。将其更改为19或20W+(不是20L)。它会解决这个问题。|97721|97722|97723|97724|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/71acbffe76a7efdfa0c440553497ef90.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/2228010cab468b2a158adc514ab8b67f.png|2|https://ask.qcloudimg.com/http-save/yehe-900000/8aa425d55393ebb1a38e1b0ab0a1ee70.png^0|0|0|0|1|0|0|0|0|0|0|1|1|0|0|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|18|8|@]|9|@$G|19|H|1A|1|1B]]|A|$]]|$1|I|3|C|5|6|7|1C|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1D|8|@]|9|@]|A|$]]|$1|L|3|C|5|6|7|1E|8|@]|9|@]|A|$]]|$1|M|3|E|5|F|7|1F|8|@]|9|@$G|1G|H|1H|1|1I]]|A|$]]|$1|N|3|C|5|6|7|1J|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1K|8|@]|9|@]|A|$]]|$1|Q|3|C|5|6|7|1L|8|@]|9|@]|A|$]]|$1|R|3|E|5|F|7|1M|8|@]|9|@$G|1N|H|1O|1|1P]]|A|$]]|$1|S|3|C|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|1R|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|10|11|-4]]|12|$5|W|X|Y|A|$Z|13|11|-4]]|14|$5|W|X|Y|A|$Z|15|11|-4]]]]

Please, note this Android icon in the upper side of the screen

<img src="https://i.stack.imgur.com/WoX58.png" alt="Android icon">

This icon is in the upper side of this screen: 

<img src="https://i.stack.imgur.com/Lqt41.png" alt="Screen which displays the API version to render the code">

Probably it's displaying the number 20. This is the selection to use the API 20 to render the window. Change it to 19, or 20W (not 20L). It'll fix the problem. 

<img src="https://i.stack.imgur.com/BMrs1.png" alt="API 19 selected">

blocks|key|4604046|text|您可能还需要修改eclipse配置以在Java7Runtime上运行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4604047|将此代码添加到eclipse.ini的开头|offset|length|style|CODE|4604048|-vm
C:/Program+Files/Java/jre7/bin|code-block|syntax|javascript|4604049|entityMap^0|0|7|B|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@$D|Q|E|R|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

You may also need to modify eclipse config to run on Java 7 Runtime.

Add this to the beginning of <code>eclipse.ini</code>

<pre><code>-vm
C:/Program Files/Java/jre7/bin
</code></pre>

blocks|key|4603806|text|这似乎是issue....the‘自动选择最佳’，选择'L‘版本的API20而不是4.x版本的API20。在我的例子中，我的目标是API19，显然这与“API20:+Android+L(预览)”的选择不兼容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4603807|很抱歉，这个系统还不允许我发布图片...|4603808|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This seems to be the issue....the 'Automatically Pick Best', picks the 'L' version of API 20 instead of the 4.x version of API 20. In my instance, I am targeting API 19 and apparently that's not compatible with the choice of "API 20: Android L (Preview)".

Sorry, this system won't let me post images yet...

blocks|key|4604066|text|检查您的JDK版本。必须是JDK1.7。JDK+1.6不工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4604067|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|$]]

Check your JDK version. It must be JDK1.7. JDK 1.6 does not work.

blocks|key|4604086|text|OPen+SDK管理器-->卸载Android+L(API20，L预览版)，如果您想要快速解决此错误，请使用此选项|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4604087|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|$]]

OPen SDK Manager --> Uninstall Android L (API 20,L preview),,use this if you want to resolve this error Quickly

blocks|key|4604013|text|在更新java之后，我所做的是再次为java设置变量system。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4604014|高级系统设置->高级->环境变量。|4604015|我用这个目录更新了JAVA_HOME|4604016|C:\Program+Files\Java\jdk1.7.0_60|4604017|回到eclipse，你可以选择：|4604018|单击属性->+Android+->项目构建目标|4604019|将android+L更改为android+4.4|4604020|如果您想使用android，那么在清单minSdkVersion中将其更改为"+L“|4604021|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|X|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|Y|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|Q|$]]

What I did after updating java was to set the variable system for java again

Advanced System Settings -> Advanced -> Environment variables.

I updated JAVA_HOME with this directory 

C:\Program Files\Java\jdk1.7.0_60

Back in eclipse, you can either:

Click Properties -> Android -> Project Build Target

Change android L for android 4.4

If you want to use android L, then change in the manifest minSdkVersion to "L"

Recently I upgraded <code>Eclipse</code> along with <code>ADT plugin</code>s to <code>Android L priew</code>.

I have the latest Java update as well i.e. <code>Java 8</code>.

I was unable to see the layout and it displays as below

<img src="https://i.stack.imgur.com/XzI9X.png" alt="enter image description here">

The project target (Android L (Preview)) was not properly loaded

Android

Eclipse

Java

最近，我把Eclipse和ADT plugin一起升级到了Android L priew。我还有最新的Java更新，也就是Java 8。我看不到布局，它显示如下​​

问项目目标(Android L (Preview))未正确加载
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