blocks|key|37645|text|首先，你应该更新到Android+Studio1.2来源：https://code.google.com/p/android/issues/detail?id=77983|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|37646|然后你应该去文件->无效缓存/重新启动->无效缓存&重新启动。|37647|然后再次尝试构建应用程序。|37648|entityMap|0|LINK|mutability|MUTABLE|url|https://code.google.com/p/android/issues/detail?id=77983^0|T|1K|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

First of all you should update to Android Studio 1.2
Source: <a href="https://code.google.com/p/android/issues/detail?id=77983">https://code.google.com/p/android/issues/detail?id=77983</a>

Then you should go to File -> Invalidate Caches / Restart -> Invalidate Caches &amp; Restart. 

Then try to build the application again.

blocks|key|37752|text|1-关闭项目|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37753|2-关闭Android+Studio集成开发环境|offset|length|style|CODE|37754|3-删除位于项目文件夹内的.idea目录|37755|4-删除所有.iml文件|37756|5-打开Android+Studio集成开发环境并导入项目|37757|entityMap^0|0|4|E|0|D|5|0|6|4|0|4|E|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@$D|X|E|Y|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|Z|8|@$D|10|E|11|F|G]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|O|$]]

1- close the project
2- close <code>Android Studio</code> IDE
3- delete the <code>.idea</code> directory located inside the project folder
4- delete all <code>.iml</code> files
5- open <code>Android Studio</code> IDE and import the project

blocks|key|37708|text|无效缓存和重启对我不起作用。我也更新了我所有的Android+Studio文件，但都没有成功。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37709|我找到的解决方案是通过单击"Import+project+(Eclipse+ADT，Gradle等)“导入android文件夹。而不是点击“打开现有的Android+Studio项目”或将文件夹拖到应用程序图标上。|37710|显然，这个问题是因为项目中的一个模块有一个不包含external.system.id="GRADLE“的*.iml文件。|37711|导入项目(而不是打开项目)时，会完全重写iml文件，从而消除错误。|37712|我在这里找到了相关信息：https://issuetracker.google.com/issues/37008041|offset|length|37713|entityMap|0|LINK|mutability|MUTABLE|url|https://issuetracker.google.com/issues/37008041^0|0|0|0|0|C|1B|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@$J|Y|K|Z|1|10]]|A|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]]]

Invalidate Caches and Restart did not work for me. I also updated all my Android Studio files with no success. 

The solution I found was importing the android folder by clicking "Import project (Eclipse ADT, Gradle, etc.)" rather than clicking "Open an existing Android Studio Project" or dragging the folder onto the app icon.

Apparently the problem is caused because a module in the project has an *.iml file that does not contain external.system.id="GRADLE".

When you import the project (as opposed to opening it), the iml files are completely re-written, thus removing the error.

I found the info here: <a href="https://issuetracker.google.com/issues/37008041" rel="noreferrer">https://issuetracker.google.com/issues/37008041</a>

blocks|key|2507092|text|转到.idea/modules.xml+&删除无效/不存在的路径<module+/>。然后是File+=>+Invalidate+Caches+/+Restart.|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2507093|entityMap^0|2|H|W|A|1A|10|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

Goto <code>.idea/modules.xml</code> &amp; delete the invalid/not existing path <code>&lt;module /&gt;</code>. Then <code>File =&gt; Invalidate Caches / Restart.</code>

blocks|key|37684|text|如果它有助于文件->使缓存无效/重新启动，请尝试此操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37685|如果仍然没有帮助，请单击图像中的按钮。‘将项目与Gradle文件同步’|37686|​|37687|📷|atomic|offset|length|37688|37689|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/d3937f2605c791f3ee57724b722985a1.png|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@$I|Y|J|Z|1|10]]|A|$]]|$1|K|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]]]

Try this if it helps File -> Invalidate Caches / Restart. 

If it still doesn't help click on the button in the image.
'Sync Project with Gradle Files'

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

blocks|key|2717170|text|我知道这是个老问题。但是在更新到Android+Studio+3.0之后，我遇到了这个问题。我通过我的应用程序模块中的deleting+app.iml文件，然后是Invalidate+Caches+/+Restart.来解决它|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2717171|entityMap^0|G|I|1N|G|29|S|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

I know it's an old question. but I faced this problem after updating to <code>Android Studio 3.0</code>. I solved it by <code>deleting app.iml</code> file inside my app module and then <code>Invalidate Caches / Restart.</code>

blocks|key|2718204|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2718205|删除所有Gradle+Projects|ordered-list-item|2718206|2718207|您不希望删除整个.idea目录，因为它包含例如字典和搁置的更改。|2718208|entityMap^0|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|I|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|J|7|@]|8|@]|9|$]]|$1|D|3|-4|4|5|6|K|7|@]|8|@]|9|$]]|$1|E|3|F|4|5|6|L|7|@]|8|@]|9|$]]|$1|G|3|-4|4|5|6|M|7|@]|8|@]|9|$]]]|H|$]]

<ol>
<li>Delete <code>.idea/modules.xml</code></li>
<li>Reload All Gradle Projects</li>
</ol>
You do not want to remove entire .idea directory, because it contains e.g. dictionaries and shelved changes.

blocks|key|2506756|text|如果上面的方法不能帮助你--检查你的模块.iml文件，看看它是否包含任何错误。(对于应用程序模块，它将是app.iml)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2506757|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|$]]

If the above doesn't help you - check your module .iml file and see if it contains any errors. (for the app module it will be app.iml).

blocks|key|2717457|text|无效缓存/重启对我不起作用。但只需在\Users\user.AndroidStudio(版本)\system中删除缓存文件夹就可以了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717458|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|$]]

Invalidating caches/Restart didn't worked for me.
But simply deleting the caches folder in \Users\user.AndroidStudio(version)\system worked like a charm

blocks|key|2507701|text|您可以通过以下流程进行解决：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2507702|2507703|在Android+Studio中，转到左侧面板，从Android切换到Project窗格|ordered-list-item|offset|length|style|CODE|2507704|展开.idea文件夹，可以看到modules.xml并打开文件。|2507705|在modules.xml文件中，您可能会看到以下内容：|2507706|2507707|++<component+name="...">
++++<modules>
++++++<module+fileurl="file://$PROJECT_DIR$/[check...].iml"+filepath="$PROJECT_DIR$/[check...].iml"+group="myProject"+/>
++++++<module+fileurl="file://$PROJECT_DIR$/app/[check...]-app.iml"+filepath="$PROJECT_DIR$/app/[check...]-app.iml"+group="[check...]/app"+/>|code-block|syntax|javascript|2507708|2507709|检查是否与模块元素|2507710|中的模块名称正确匹配，然后同步gradle文件|2507711|2507712|entityMap^0|0|0|P|7|Z|7|0|2|5|F|B|0|1|B|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|13|8|@$F|14|G|15|H|I]|$F|16|G|17|H|I]]|9|@]|A|$]]|$1|J|3|K|5|E|7|18|8|@$F|19|G|1A|H|I]|$F|1B|G|1C|H|I]]|9|@]|A|$]]|$1|L|3|M|5|E|7|1D|8|@$F|1E|G|1F|H|I]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]|$1|O|3|P|5|Q|7|1H|8|@]|9|@]|A|$R|S]]|$1|T|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|U|3|V|5|E|7|1J|8|@]|9|@]|A|$]]|$1|W|3|X|5|E|7|1K|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|10|$]]

You may resolve by below process:

<ol>
<li>In Android Studio, go to left panel, switch from <code>Android</code> to <code>Project</code> pane</li>
<li>Expand <code>.idea</code> folder, you can see <code>modules.xml</code> and open the file.</li>
<li>In the <code>modules.xml</code> file, you might see like below: </li>
</ol>

<pre><code> &lt;component name="..."&gt;
 &lt;modules&gt;
 &lt;module fileurl="file://$PROJECT_DIR$/[check...].iml" filepath="$PROJECT_DIR$/[check...].iml" group="myProject" /&gt;
 &lt;module fileurl="file://$PROJECT_DIR$/app/[check...]-app.iml" filepath="$PROJECT_DIR$/app/[check...]-app.iml" group="[check...]/app" /&gt;

</code></pre>

<ol start="4">
<li>Check that match the module name correctly in module element</li>
<li>And then, sync the gradle file</li>
</ol>

blocks|key|2717193|text|关闭Android+Studio并移动".idea“文件夹，并将其粘贴到项目根文件夹之外(以便在需要时进行备份)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717194|打开Android工作室。在打开项目时，它会询问添加模块(app)到你的项目。你可以忽略同样的问题。|2717195|它将set+default+build+variant设置为"debug“。您可以在左上角看到build+variant选项卡，或者将鼠标悬停在左下角的"Monitor“符号上|2717196|注意:不需要更改project.tom的.iml文件来获取构建变量选项，“无效缓存和重启”也不会起作用，相反，它也会清除您的历史文件！|2717197|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Close the Android Studio and Move ".idea" Folder and paste it outside Project root folder( For Back up if you need). 

Open the Android studio.
On Opening the project it"ll ask add module (app) to your project. You can ignore the same.

It set set default build variant to be "debug".
You can see build variant tab on left corner or hover on "Monitor" Symbol on left bottom

Note: No need to change your .iml file of your project.tom to get build variant option and "Invalidate Cache and Restart" will also not work rather it will clear your history files too!.

blocks|key|2506821|text|我通过关闭项目，然后重新导入项目(不是打开，而是作为eclipse或其他项目重新导入)解决了类似的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2506822|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|$]]

I solved a similar problem by closing the project, then re-importing the project (not opening, but re-importing as an eclipse or other project)

blocks|key|2507158|text|试试下面的方法，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2507159|2507160|关闭android+studio|ordered-list-item|2507161|，然后删除.iml，.idea文件|2507162|再次打开android+studio|2507163|与Gradle同步。|2507164|2507165|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|P|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|S|8|@]|9|@]|A|$]]|$1|J|3|K|5|E|7|T|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

Try the below, 

<ol>
<li>Close android studio</li>
<li>Then delete .iml , .idea files</li>
<li>Open again the android studio</li>
<li>Sync with Gradle.</li>
</ol>

blocks|key|2507492|text|在我的情况下|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2507493|我已经删除了|2507494|android+->+.idea+Folder+android+->+appname.iml+file+android+->+app+->+app.iml+file|offset|length|style|CODE|2507495|在Android+Studio中打开项目，无需File+->+Invalidate+Caches/Restart|2507496|您可以针对您的情况执行无效缓存/重新启动。|2507497|entityMap^0|0|0|0|N|O|R|1G|U|0|N|X|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@$F|S|G|T|H|I]|$F|U|G|V|H|I]|$F|W|G|X|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@$F|Z|G|10|H|I]]|9|@]|A|$]]|$1|L|3|M|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|O|$]]

In My Case 

I have deleted 

<code>android -&gt; .idea Folder</code>
<code>android -&gt; appname.iml file</code>
<code>android -&gt; app -&gt; app.iml file</code>

Open project in Android Studio and no need to <code>File -&gt; Invalidate Caches/Restart</code>

You can do Invalidate Caches / Restart for your case.

blocks|key|37423|text|您应该导入项目|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37424|https://issuetracker.google.com/issues/37008041|offset|length|37425|当你的项目中有一个模块的.iml文件不包含:+external.system.id="GRADLE“时，就会出现这个错误。你能检查一下你的.iml文件吗？此外，不是打开项目，而是导入它，这将完全重写您的.iml文件，您将不会再次看到该错误。|37426|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1B|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@$D|Q|E|R|1|S]]|A|$]]|$1|F|3|G|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|C]]]]

You should import the the project

<a href="https://issuetracker.google.com/issues/37008041" rel="nofollow noreferrer">https://issuetracker.google.com/issues/37008041</a>

This error shows up when there is a module in your project whose .iml file does not contain: 
 external.system.id="GRADLE" Can you please check your .iml files? Also, instead of opening the project, import it, that will completely rewrite your .iml files and you won't see that error again.

blocks|key|2507368|text|逐个尝试以下步骤：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2507369|1)进入文件->无效缓存/重新启动。|offset|length|style|BOLD|2507370|2)关闭android+studio，进入C：\Users(您的UserName).AndroidStudio(version)\system并删除缓存文件夹。|2507371|如果到目前为止什么都没有起作用，那么这一步肯定会起作用…|2507372|3)只需更改项目位置并导入新位置的项目即可。|2507373|享受:-):-)|2507374|entityMap^0|0|4|D|0|L|1E|22|2|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@$D|W|E|X|F|G]|$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|10|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|12|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|Q|$]]

Try this steps Individually:-

1) Go to File->Invalidate Caches / Restart.

2) Close android studio, Go to C:\Users\(Your UserName)\.AndroidStudio(version)\system and delete caches folder.

If till now nothing worked, then this step will definitely work...

3) Simply change project location and import project with new location.

Enjoy :-):-)

blocks|key|2717293|text|步骤1:删除.iml文件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717294|步骤2:检查项目目录中是否包含空格，如果包含空格，则重命名项目目录并保留空格|2717295|例如：|2717296|之前:我的项目|2717297|重命名后:+MyProject|2717298|打开Android+Studio..。|2717299|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

Step 1 : Delete .iml file 

Step 2 : Check if your Project Directory Contain any white spaces if so then Rename your project directory leaving space

ex: 

Before : My Project

After rename : MyProject

and open Android Studio...

blocks|key|2507718|text|上面的解决方案我已经尝试过了，但对我来说不起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2507719|在Windows10操作系统的user+profile目录下，我使用Android+Studio+menu+File+->+Invalidate+Caches+/+Restart|offset|length|style|CODE|2507720|Deleted+.gradle+folder从项目directory.|unordered-list-item|2507721|
|2507722|Invalidate缓存中删除了.idea文件夹。(即C:\Users_YourUserName_.gradle)|2507723|2507724|如果上述方法不起作用，请尝试此解决方案。|2507725|entityMap^0|0|1I|Z|0|8|7|0|0|G|5|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@$D|V|E|W|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|N|5|J|7|11|8|@$D|12|E|13|F|G]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|15|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|S|$]]

The above solution I've tried but didn't work for me.

<ol>
<li>I deleted the <code>.idea</code> folder from project directory.</li>
<li>Invalidate caches using Android Studio menu <code>File -&gt; Invalidate Caches / Restart</code></li>
<li>Deleted <code>.gradle</code> folder from user profile directory of Windows 10 operating system. (i.e., C:\Users\YourUserName\.gradle)</li>
</ol>

Try this solution if the above not working.

blocks|key|37795|text|对于windows用户，这也可能是由文件系统损坏引起的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37796|如果以上所有步骤都不能纠正错误：|37797|37798|关闭安卓工作室|unordered-list-item|37799|打开命令提示符as+Administrator|37800|Run+a+chkdsk+/f在存储应用程序的驱动器上删除|offset|length|style|CODE|37801|+.idea+Android+Studio|37802|37803|entityMap^0|0|0|0|0|0|6|9|0|1|5|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|Z|8|@$L|10|M|11|N|O]]|9|@]|A|$]]|$1|P|3|Q|5|G|7|12|8|@$L|13|M|14|N|O]]|9|@]|A|$]]|$1|R|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|T|$]]

For windows users, this can also be caused by filesystem corruption.

If all steps above do not correct the error:

<ul>
<li>Close Android Studio</li>
<li>Open Command Prompt as Administrator</li>
<li>Run a <code>chkdsk /f</code> on the drive your app is stored</li>
<li>Delete <code>.idea</code> folder</li>
<li>Restart Android Studio</li>
</ul>

blocks|key|2507285|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2507286|将.idea文件夹保存到其他位置(用于备份)|ordered-list-item|2507287|remove+.idea+folder|2507288|start+AndroidStudio|2507289|select+project|2507290|可能存在错误，请忽略|2507291|H111单击文件->无效缓存/按钮:使缓存无效/+Restart|2507292|click|2507293|2507294|entityMap^0|0|0|0|0|0|0|1|1|0^^$0|@$1|2|3|-4|4|5|6|S|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|T|7|@]|8|@]|9|$]]|$1|D|3|E|4|C|6|U|7|@]|8|@]|9|$]]|$1|F|3|G|4|C|6|V|7|@]|8|@]|9|$]]|$1|H|3|I|4|C|6|W|7|@]|8|@]|9|$]]|$1|J|3|K|4|C|6|X|7|@]|8|@]|9|$]]|$1|L|3|M|4|5|6|Y|7|@]|8|@]|9|$]]|$1|N|3|O|4|C|6|Z|7|@]|8|@]|9|$]]|$1|P|3|-4|4|5|6|10|7|@]|8|@]|9|$]]|$1|Q|3|-4|4|5|6|11|7|@]|8|@]|9|$]]]|R|$]]

<ol>
<li>save .idea folder somewhere else (for backup)</li>
<li>remove .idea folder</li>
<li>start AndroidStudio</li>
<li>select project</li>
<li>[there may be an error, ignore that]</li>
<li>click File -> Invalidate Caches/ Restart</li>
<li>click button: Invalidate Caches/ Restart</li>
<li>resolved</li>
</ol>

blocks|key|38212|text|Delete+.idea+folder+
Close+project+->
Reopen+Project+->
Invalidate+Caches+/+restart|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|38213|​|unstyled|38214|📷|atomic|offset|length|38215|38216|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/ef9886197fe3b72acb198bb3e285e443.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|X|8|@]|9|@$J|Y|K|Z|1|10]]|A|$]]|$1|L|3|E|5|F|7|11|8|@]|9|@]|A|$]]|$1|M|3|-4|5|F|7|12|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T|U|-4]]]]

<pre><code>Delete .idea folder 
Close project -&gt;
Reopen Project -&gt;
Invalidate Caches / restart
</code></pre>
<a href="https://i.stack.imgur.com/nbvHz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nbvHz.png" alt="enter image description here" /></a>

blocks|key|2717149|text|您可以更新新版本的Android+studio，然后转到无效捕获/重新启动。单击同步按钮构建应用程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717150|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|$]]

You can update new version of Android studio then go to invalidate catches/restart.Click sync button build application.

blocks|key|37739|text|在我的例子中，我克隆了一个同时包含Java和Kotlin的git-project。然后选中另一个分支并按下“与Gradle文件同步项目”。Android+Studio+3.0.1。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37740|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|$]]

In my case I cloned a git-project where both Java and Kotlin included. Then checked another branch and pressed "Sync Project with Gradle Files". Android Studio 3.0.1.

blocks|key|38816|text|我在androidStudio+3.2上遇到了同样的问题，克隆这个项目对我很有效|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|38817|entityMap^0|2|H|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I had the same issue on <code>androidStudio 3.2</code> and clonning the project worked for me

blocks|key|2717283|text|在我的例子中，这是因为根项目名称有一个空格。因此，应该将其命名为sample-project或sample_project，而不是将其命名为sample+project。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2717284|entityMap^0|W|E|1B|E|1Y|E|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

In my case it is because the root project name have a space.
So instead of naming it as <code>sample project</code>, it should be <code>sample-project</code> or <code>sample_project</code>.

blocks|key|38062|text|单击文件->无效缓存/重新启动不再对您有帮助|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|38063|从安卓工作室以外的文件资源管理器中删除.iml，.idea文件和文件夹|38064|1)使用不同的/另一个项目打开android+studio|38065|2)导入新项目，而不是最近的项目|38066|3)重新构建项目|38067|肯定能行得通|38068|entityMap^0|0|F|0|J|4|O|5|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|10|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|11|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|12|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|Q|$]]

click File -> Invalidate Caches/ Restart doesn't help you anymore 
Delete .iml , .idea files &amp; folders from file explorer not inside android studio

1) Open android studio with different/another project

2) import project newly not from recent

3) build the project again

sure it will work

blocks|key|2718179|text|我遇到了完全相同的错误，每次我打开Android+Studio时都会看到警报，这让我非常恼火。我尝试了上面提到的解决方案，包括无效缓存，重启等，没有什么能让它消失。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2718180|在我的例子中，我们有一个从源代码中删除的模块，引用也从settings.gradle中删除。事实证明，.idea/modules.xml仍然引用该模块。|offset|length|style|CODE|2718181|我所需要做的就是在.idea/modules.xml中删除<modules>中的这一行，它就会让这一切都消失。|2718182|entityMap^0|0|R|F|1F|H|0|9|H|T|9|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]|$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@$D|S|E|T|F|G]|$D|U|E|V|F|G]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|K|$]]

I had the exact same error and it was so annoying to see the alert every time I stared Android Studio. I tried the solution mentioned above including invalidating cache, restart etc, nothing made it go away.

In my case, we had a module that was deleted from source and the reference also removed from <code>settings.gradle</code>. Turns out, <code>.idea/modules.xml</code> was still referencing that module.

All I needed to do was remove that line from <code>&lt;modules&gt;</code> in <code>.idea/modules.xml</code> and it made it all go away.

blocks|key|2717426|text|重命名项目目录修复错误，android+studio+3.4.2|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2717427|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|$]]

rename project directory fix error for me, android studio 3.4.2

blocks|key|37949|text|删除项目中的*.iml文件并使缓存无效，然后重新启动|type|unstyled|depth|inlineStyleRanges|entityRanges|data|37950|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|$]]

Delete *.iml file in your project
and 
make invalidate the cache and restart

blocks|key|2718210|text|以上所有答案都是正确的，但在我的情况下，我的应用程序目录中没有可用的lib文件夹，我正在尝试调用应用程序gradle文件中的以下行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2718211|+compile+fileTree(include:+['*.jar'],+dir:+'libs')|code-block|syntax|javascript|2718212|因此，请确保您在gradle文件中声明的任何依赖项都可用于应用程序|2718213|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

All above answer is correct but in my case There is no lib folder available in my app directory and I am trying to call below line in app gradle file
<pre><code> compile fileTree(include: ['*.jar'], dir: 'libs')
</code></pre>
So make sure what ever dependency you declare in gradle file in available for app

blocks|key|38378|text|我也有同样的问题。我尝试过Invalidate+Cache+/+Restart+&也是sync+project+with+Gradle+Files，但仍然不能工作。但是通过使用以下步骤来工作：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|38379|gradle.wrapper.properties.上的|BOLD|38380|升级gradle发行版版本|ordered-list-item|38381|38382|distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip|38383|build.gradle项目中的|38384|和Android+Gradle插件|38385|38386|classpath+'com.android.tools.build:+gradle+:4.1.2‘//在此处升级gradle插件|38387|然后是Invalidate+Cache+/+Restart的|38388|38389|38390|38391|这一切都解决了我的问题。希望你也是|38392|38393|entityMap^0|D|Q|17|U|0|0|P|0|0|0|0|0|C|0|0|0|0|3|Q|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1A|8|@$9|1B|A|1C|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|1D|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1F|8|@]|D|@]|E|$]]|$1|O|3|P|5|6|7|1G|8|@$9|1H|A|1I|B|H]]|D|@]|E|$]]|$1|Q|3|R|5|K|7|1J|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|1L|8|@]|D|@]|E|$]]|$1|V|3|W|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@]|E|$]]|$1|X|3|-4|5|K|7|1P|8|@]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|1R|8|@]|D|@]|E|$]]|$1|10|3|11|5|K|7|1S|8|@]|D|@]|E|$]]|$1|12|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]|$1|13|3|-4|5|6|7|1U|8|@]|D|@]|E|$]]]|14|$]]

I have the same issue. I was tried <code>Invalidate Cache / Restart</code> &amp; also <code>sync project with Gradle Files</code> but still didn't work.
But worked by use the following steps:
<ol>
<li>upgrading gradle distribution version at gradle.wrapper.properties.
<pre><code>distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
</code></pre>
</li>
<li>And also Android Gradle Plugin at build.gradle project
<pre><code> classpath 'com.android.tools.build:gradle:4.1.2' //upgrade gradle plugin here
</code></pre>
</li>
<li>Then <code>Invalidate Cache / Restart</code>
</li>
<li>That's all solved my problem. Hope you too
</li>
</ol>

blocks|key|37415|text|在app中检查build.gradle，你有很好的编译链接，.I有错误的这行compile+'com.android.support:support-annotations:x.x.x'删除和工作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|37416|entityMap^0|12|1J|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Check in build.gradle in app you have good compile link .I have mistake with this line <code>compile 'com.android.support:support-annotations:x.x.x'</code> delete and work.

I am using Android studio 1.0.1. I have a java module referred by other modules in my project. I have checked it out from SVN But now every 

Unsupported Modules Detected: Compilation is not supported for following modules: . Unfortunately you can't have non-Gradle Java modules and Android-Gradle modules in one project.

After getting this error AS stop compilation of this module so that I am not able to compile/run my project any more.

Android studio Error "Unsupported Modules Detected: Compilation is not supported for following modules"

我使用的是Android studio 1.0.1。我有一个java模块被我的项目中的其他模块引用。我已经从SVN上查过了，但现在每检测到不支持的模块:以下模块不支持编译：。遗憾的是，您不能在一个项目中包含非Gradle Java模块和Android-Gradle模块。在得到这个错误后，停止编译这个模块，这样我就不能编译/运行我的项目了。

问Android studio错误“检测到不支持的模块:以下模块不支持编译”
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回答 32

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