blocks|key|122290|text|单击此选项以解决错误：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122291|​|122292|📷|atomic|offset|length|122293|122294|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/9ce661ec617e3c456dc5e0b0d27e2787.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

Click this option to solve the error:

<img src="https://i.stack.imgur.com/2KSyU.png" alt="Run: View &gt; Tool Windows &gt; Gradle &gt; [project] &gt; Tasks &gt; build &gt; build">

blocks|key|122516|text|如果你在更新到Android+StudioV3.1之后遇到了这个问题，那么试试下面的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122517|当我更新到Android+Studio+3.1时，我也面临着同样的问题。我在这里找到的所有其他解决方案都是非常手动的，因为你必须每次都进行清理和重建，这一点也不好。但多亏了Iman+Marashi在这里的回答，我才能解决这个问题。|offset|length|122518|转到运行->编辑配置...|style|BOLD|122519|确保你在启动前部分有一个"Gradle-aware+Make“：|122520|​|122521|📷|atomic|122522|122523|要添加它，单击%2B符号并选择Gradle-aware+Make，将出现一个弹出窗口，只需保留文本字段为空，然后单击OK和OK。|122524|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/3760297/iman-marashi|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/f483ff542681e5f562f62a055330b9ba.png|imageAlt^0|0|2E|C|0|0|2|B|0|0|0|0|1|1|0|0|7|1|D|H|1K|2|1N|2|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|18|8|@]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|F|3|G|5|6|7|1C|8|@$D|1D|E|1E|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|1F|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1G|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|1H|8|@]|9|@$D|1I|E|1J|1|1K]]|A|$]]|$1|Q|3|M|5|6|7|1L|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1M|8|@$D|1N|E|1O|H|I]|$D|1P|E|1Q|H|I]|$D|1R|E|1S|H|I]|$D|1T|E|1U|H|I]]|9|@]|A|$]]|$1|T|3|-4|5|6|7|1V|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|10]]|11|$5|12|X|13|A|$14|15|16|-4]]]]

<h2>If you are facing this issue after the update to Android Studio V 3.1 then try the below.</h2>

I was facing this same problem when I updated to Android Studio 3.1. All other solutions I found here were quite manual because you have to clean and rebuild every time, that is not good at all. But thanks to <a href="https://stackoverflow.com/users/3760297/iman-marashi">Iman Marashi</a>'s answer here I was able to solve it.

Go to Run -> Edit Configurations...

Make sure you have a "Gradle-aware Make" on the Before launch section:

<a href="https://i.stack.imgur.com/9YoVI.png" rel="noreferrer"><img src="https://i.stack.imgur.com/9YoVI.png" alt="Run/Debug Configurations"></a>

To add it click the + sign and select Gradle-aware Make and a popup will appear, just leave the text field empty and click OK and OK.

blocks|key|2891274|text|在我的例子中，执行“与Gradle文件同步项目”很有帮助。无论是重启Andoid+Studio还是清除缓存都没有起到任何作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2891275|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, executing "Sync Project with Gradle Files" helped. Neither restarting Andoid Studio nor clearing the cache did anything.

blocks|key|125076|text|如果您只想知道结论，请转到最后一节。谢谢。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125077|通常，当构建项目失败时，您可以尝试一些常见的技巧：|125078|Android+Project|125079|Check+Build+Variants|unordered-list-item|125080|
|125081|Restart+|offset|length|style|BOLD|125082|Build+->+Clean+Build+Variants|125083|RestartAndroid(如您所述)|125084|125085|125086|但更具体地说，当Android+Studio在磁盘上找不到APK文件时。这意味着Android+Studio实际上已经成功构建了项目，并生成了APK，但是，由于某些原因，Android+Studio无法找到该文件。|125087|在这种情况下，请根据日志检查打印目录。这很有帮助。|125088|例如：|125089|使用Android+Studio+2.0预览版(build+143.2443734)。|125090|将分支签出到特定的提交(以便将其从head中分离)：APK+|125091|+checkout+commit_hash|125092|125093|Run+project|125094|125095|Android+/Users/MyApplicationName/app/build/outputs/apk/app-debug-HEAD.apk+|125096|commit_hash|125097|125098|Run+project|125099|125100|Android+tells:+APK文件/Users/MyApplicationName/app/build/outputs/apk/app-debug-HEAD.apk不存在于磁盘上，请转到该目录，有一个实际名称为：app-debug-(HEAD.apk的文件(带有额外的parenthesis)|125101|125102|Run+git分支|125103|125104|*(在1a2bfff时分离磁头)|125105|所以在这里你可以看到，由于我的gradle构建脚本的错误，文件命名是错误的。|125106|上面的例子只是一个可能导致相同问题的场景，但不一定是与您的问题相同的根本原因。|125107|因此，我强烈建议您检查目录(以找出差异)，并检查您的build.gradle脚本(您可以在那里更改apk名称，如下所示)：|125108|applicationVariants.all+{+variant+->
++++++++variant.outputs.each+{+output+->
++++++++++++def+newFileName+=+"whatever+you+want+to+name+it";
++++++++++++def+apk+=+output.outputFile;
++++++++++++output.outputFile+=+new+File(apk.parentFile,+newFileName);
++++++++}
++++}|code-block|syntax|javascript|125109|entityMap^0|0|0|0|0|0|0|7|0|9|K|0|0|K|0|0|0|0|2Z|0|0|P|0|0|3|0|0|17|0|0|U|0|0|L|0|0|0|B|0|0|0|21|0|0|B|0|0|0|0|1V|I|31|J|0|0|4|5|0|0|0|0|0|9|2|Q|C|0|0^^$0|@$1|2|3|4|5|6|7|25|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|26|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|27|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|28|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|29|8|@]|9|@]|A|$]]|$1|K|3|L|5|H|7|2A|8|@$M|2B|N|2C|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|H|7|2D|8|@$M|2E|N|2F|O|P]]|9|@]|A|$]]|$1|S|3|T|5|H|7|2G|8|@$M|2H|N|2I|O|P]]|9|@]|A|$]]|$1|U|3|-4|5|6|7|2J|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|2K|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|2L|8|@$M|2M|N|2N|O|P]]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|2O|8|@$M|2P|N|2Q|O|P]]|9|@]|A|$]]|$1|10|3|11|5|6|7|2R|8|@$M|2S|N|2T|O|P]]|9|@]|A|$]]|$1|12|3|13|5|6|7|2U|8|@$M|2V|N|2W|O|P]]|9|@]|A|$]]|$1|14|3|15|5|6|7|2X|8|@$M|2Y|N|2Z|O|P]]|9|@]|A|$]]|$1|16|3|17|5|H|7|30|8|@$M|31|N|32|O|P]]|9|@]|A|$]]|$1|18|3|J|5|6|7|33|8|@]|9|@]|A|$]]|$1|19|3|1A|5|H|7|34|8|@$M|35|N|36|O|P]]|9|@]|A|$]]|$1|1B|3|J|5|6|7|37|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|H|7|38|8|@$M|39|N|3A|O|P]]|9|@]|A|$]]|$1|1E|3|1F|5|H|7|3B|8|@$M|3C|N|3D|O|P]]|9|@]|A|$]]|$1|1G|3|J|5|6|7|3E|8|@]|9|@]|A|$]]|$1|1H|3|1I|5|H|7|3F|8|@]|9|@]|A|$]]|$1|1J|3|J|5|6|7|3G|8|@]|9|@]|A|$]]|$1|1K|3|1L|5|H|7|3H|8|@$M|3I|N|3J|O|P]|$M|3K|N|3L|O|P]]|9|@]|A|$]]|$1|1M|3|J|5|6|7|3M|8|@]|9|@]|A|$]]|$1|1N|3|1O|5|H|7|3N|8|@$M|3O|N|3P|O|P]]|9|@]|A|$]]|$1|1P|3|-4|5|6|7|3Q|8|@]|9|@]|A|$]]|$1|1Q|3|1R|5|6|7|3R|8|@]|9|@]|A|$]]|$1|1S|3|1T|5|6|7|3S|8|@]|9|@]|A|$]]|$1|1U|3|1V|5|6|7|3T|8|@]|9|@]|A|$]]|$1|1W|3|1X|5|6|7|3U|8|@$M|3V|N|3W|O|P]|$M|3X|N|3Y|O|P]]|9|@]|A|$]]|$1|1Y|3|1Z|5|20|7|3Z|8|@]|9|@]|A|$21|22]]|$1|23|3|-4|5|6|7|40|8|@]|9|@]|A|$]]]|24|$]]

If you just want to know the conclusion, please go to the last section. Thanks.

Usually when building project fails, some common tricks you could try:

<ul>
<li>Build -> Clean Project</li>
<li>Check Build Variants</li>
<li>Restart Android Studio (as you mentioned)</li>
</ul>

But to be more specific to your problem - when Android Studio could not find the APK file on disk. It means that Android Studio has actually successfully built the project, and also generated the APK, however, for some reason, Android Studio is not able to find the file.

In this case, please check the printed directory according to the log. It's helpful.

For example:

With Android Studio 2.0 Preview (build 143.2443734).

<ol>
<li>Checkout to a specific commit (so that it's detached from head): git checkout [commit_hash]</li>
<li>Run project</li>
<li>Android Studio tells: The APK file /Users/MyApplicationName/app/build/outputs/apk/app-debug-HEAD.apk does not exist on disk</li>
<li>Go to the directory, there is a file actually named: app-debug-(HEAD.apk (with an extra parenthesis)</li>
<li>Run git branch

*(HEAD detached at 1a2bfff)</li>
</ol>

So here you could see, due to my gradle build script's mistake, file naming is somehow wrong.

Above example is just one scenario which could lead to the same issue, but not necessary to be the same root cause as yours.

As a result, I strongly recommend you to check the directory (to find the difference), and check your build.gradle script (you may change the apk name there, something like below):

<pre><code>applicationVariants.all { variant -&gt;
 variant.outputs.each { output -&gt;
 def newFileName = "whatever you want to name it";
 def apk = output.outputFile;
 output.outputFile = new File(apk.parentFile, newFileName);
 }
 }
</code></pre>

blocks|key|2891484|text|确保路径中没有撇号、或&|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2891485|entityMap^0|7|3|B|1|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Make sure that you don't have apostrophe or &amp; in your path

blocks|key|2891720|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2891721|​|2891722|📷|atomic|offset|length|2891723|2891724|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/8819d5e9dfef18e3dc27ee7cb48ad6ae.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|-4|4|5|6|R|7|@]|8|@]|9|$]]|$1|A|3|B|4|5|6|S|7|@]|8|@]|9|$]]|$1|C|3|D|4|E|6|T|7|@]|8|@$F|U|G|V|1|W]]|9|$]]|$1|H|3|B|4|5|6|X|7|@]|8|@]|9|$]]|$1|I|3|-4|4|5|6|Y|7|@]|8|@]|9|$]]]|J|$K|$4|L|M|N|9|$O|P|Q|-4]]]]

Make sure that there is Grading-aware Make in Run/Debugging configurations >> before launch section :

<a href="https://i.stack.imgur.com/N1qMW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/N1qMW.png" alt="Like this image"></a>

blocks|key|122276|text|我经常在切换git分支时看到类似的问题。对我来说，关闭Android+Studio+rm+-rfv+~/Library/Caches/AndroidStudio*并重启Android+Studio就是门票。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|122277|entityMap^0|16|13|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 witnessed a similar issue usually when I'm switching git branches. For me shutting down Android Studio <code>rm -rfv ~/Library/Caches/AndroidStudio*</code> and restart Android Studio is the ticket.

blocks|key|2679874|text|在Android+Studio+3.1.1中，选择File+%7C+Sync+Project+with+Gradle+Files。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679875|在Android+Studio+3中，选择File+%7C+Synchronize。|2679876|然后再次运行您的项目。|2679877|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

In Android Studio 3.1.1 select File | Sync Project with Gradle Files. 

In Android Studio 3, select File | Synchronize. 

Then run your project again.

blocks|key|2891782|text|年份是2018年。Android+Studio的版本是3.2.0+alpha3，我们仍然会遇到这个问题。由于以上这些方法对我都不起作用，这里是我的2点意见：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2891783|每次发生这种情况时，我都会从命令行生成apk：|2891784|gradlew+assembleDebug|code-block|syntax|javascript|2891785|更新|2891786|正在删除文件夹.AndroidStudio[version]并丢失所有首选项和缓存...似乎解决了这个问题|offset|length|style|CODE|2891787|entityMap^0|0|0|0|0|7|N|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|W|8|@$M|X|N|Y|O|P]]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

The year is 2018. Android Studio version is 3.2.0 alpha3 and we still get this problem. As none of the above worked for me, here is my 2 cents:

Every time this happens I just generate the apk from command line:

<pre><code>gradlew assembleDebug
</code></pre>

UPDATE

Deleting the folder <code>.AndroidStudio[version]</code> and losing all your preferences and caches... seems to solve the problem

blocks|key|123183|text|在我的例子中，我在应用程序文件路径中使用了一个特殊字符。我关闭了Android+Studio，并从应用程序文件路径中删除了的字符。当我重新开始这个项目时，一切都很顺利。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|123184|entityMap^0|1P|1|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|$]]

In my case, I was using a special character in my app file path. I closed the Android Studio and removed the ' character from my app file path. Everything worked fine when I reopned the project.

blocks|key|2679436|text|我已经解决了使用顶部窗口的Build选项和Build+APK构建apk的问题。没必要做奇怪的事。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679437|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've solved building an apk using the Build option from the top window and Build APK. No need to do something weird.

blocks|key|123173|text|对于类Unix用户(Linux/MacOs+X)，请在命令行中执行以下操作，而不是删除~/..gradle/cache/：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|123174|$+cd+path_to_you_project
$+touch+build.gradle|code-block|syntax|javascript|123175|然后要求Android+Studio构建APK，它会自行重置gradle缓存。|123176|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|$]]

For Unix like users (Linux/MacOs X), instead of removing ~/.gradle/caches/, in command line do :

<pre><code>$ cd path_to_you_project
$ touch build.gradle
</code></pre>

Then ask Android Studio to build APK, it will reset gradle cache itself.

blocks|key|2891432|text|我的问题是我把版本号附加到APK上了。更改版本号并重新同步Gradle为我解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2891433|def+appendVersionNameVersionCode(variant,+defaultConfig)+{
++++variant.outputs.each+{+output+->
++++++++if+(output.zipAlign)+{
++++++++++++def+file+=+output.outputFile
++++++++++++def+removeApp+=+file.name.replace("app-",+"")
++++++++++++def+removeType+=+removeApp.replace("-release",+"")
++++++++++++def+fileName+=+removeType.replace(".apk",+"."+%2B+defaultConfig.versionName+%2B+".apk")
++++++++++++output.outputFile+=+new+File(file.parent,+fileName)
++++++++}

++++++++def+file+=+output.packageApplication.outputFile
++++++++def+removeApp+=+file.name.replace("app-",+"")
++++++++def+removeType+=+removeApp.replace("-release",+"")
++++++++def+fileName+=+removeType.replace(".apk",+"."+%2B+defaultConfig.versionName+%2B+".apk")
++++++++output.packageApplication.outputFile+=+new+File(file.parent,+fileName)
++++}
}|code-block|syntax|javascript|2891434|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|$]]

My problem is that I was appending the version number to the APK. Changing the version number and re-syncing Gradle fixed the problem for me. 

<pre><code>def appendVersionNameVersionCode(variant, defaultConfig) {
 variant.outputs.each { output -&gt;
 if (output.zipAlign) {
 def file = output.outputFile
 def removeApp = file.name.replace("app-", "")
 def removeType = removeApp.replace("-release", "")
 def fileName = removeType.replace(".apk", "." + defaultConfig.versionName + ".apk")
 output.outputFile = new File(file.parent, fileName)
 }

 def file = output.packageApplication.outputFile
 def removeApp = file.name.replace("app-", "")
 def removeType = removeApp.replace("-release", "")
 def fileName = removeType.replace(".apk", "." + defaultConfig.versionName + ".apk")
 output.packageApplication.outputFile = new File(file.parent, fileName)
 }
}
</code></pre>

blocks|key|2679904|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679905|+Build+->+Build+APK(s)并确保它可以正常工作|blockquote|2679906|2679907|entityMap^0|0|0|0^^$0|@$1|2|3|-4|4|5|6|G|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|H|7|@]|8|@]|9|$]]|$1|D|3|-4|4|5|6|I|7|@]|8|@]|9|$]]|$1|E|3|-4|4|5|6|J|7|@]|8|@]|9|$]]]|F|$]]

<blockquote>
 Build ---> Build APK(s) and be sure it works
</blockquote>

blocks|key|125283|text|同步、清理、重建和使缓存无效并重新启动|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125284|他们对我来说都不起作用。|125285|我已经删除了发布文件夹和调试文件夹中的APK和output.json文件，然后尝试了同步、清理和构建，然后它工作得很好。|125286|或者简单地删除包含apk和output.json文件的文件夹(在调试/发布的情况下)|125287|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|$]]

Sync, Clean, Rebuild and Invalidate Cache and Restart
None of them worked for me.
I have deleted the APK and output.json files in the release folder and debug folder and then tried sync, clean, and build, then it worked fine.
OR simply
Delete folder which has the apk and output.json file (in case of debug/ release)

blocks|key|2891436|text|File+->使缓存无效/重新启动|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2891437|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|$]]

File -> Invalidate Caches / Restart

blocks|key|125232|text|如果您尝试了上述所有答案，但都不起作用，请尝试禁用“即时运行”功能。在所有的尝试之后，这一次帮助了我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125233|文件->设置->+Build，Execution，Deployment+->+Instant+Run+->取消选中此处的复选框|offset|length|style|BOLD|125234|entityMap^0|0|0|1R|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

If you tried all the above answers and it didn't work try to disable "Instant Run" feature. This one helped me after all attempts. 

File -> Settings -> Build, Execution, Deployment -> Instant Run -> Uncheck checkbox there

blocks|key|2679639|text|在清理构建之后，我也遇到了这个问题。对我来说，解决方案是我只是同步gradle，它对我起作用了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679640|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 also got that issue, after cleaning the build. For me solution was I just sync the gradle and it worked for me.

blocks|key|2680222|text|在我的例子中，问题是调试配置以某种方式变成了无效的，即使测试方法的名称、类或包没有改变。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2680223|我在这里从Run->Edit+Configurations中删除了配置：|2680224|​|2680225|📷|atomic|2680226|2680227|Android+studio会自动创建一个新的。|2680228|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/132b8859009cabdd7a8fa1f7815ab04d.png|imageAlt^0|C|D|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|12|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|M|3|I|5|6|7|17|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|18|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|19|8|@]|D|@]|E|$]]]|Q|$R|$5|S|T|U|E|$V|W|X|-4]]]]

In my case the problem was that debugging configuration become invalid somehow, even that the test method name, class or package has not changed.

I deleted the configurations from Run->Edit Configurations, at here:

<a href="https://i.stack.imgur.com/blhP0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/blhP0.png" alt="enter image description here"></a>

Android studio will create a new one automatically.

blocks|key|125142|text|在gradle+1.5中也面临同样的问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125143|我必须清理构建文件：|125144|125145|生成->清理项目|blockquote|125146|125147|125148|并构建一个APK来强制gradle文件的完全编译和同步：|125149|125150|+Build+->+Build+APK|125151|125152|125153|我仍然不知道这是为什么或者是怎么发生的。|125154|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|X|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|10|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|M|3|N|5|G|7|12|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|T|$]]

Faced the same issue with gradle 1.5

I had to clean the build files:

<blockquote>
 Build -> Clean project
</blockquote>

And build an APK to force the full compilation and sync of the gradle files:

<blockquote>
 Build -> Build APK
</blockquote>

I still don't know why or how it happened tho.

blocks|key|122313|text|如果您使用的是Linux，请尝试设置app/build文件夹的写入权限。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122314|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 you are using Linux, try setting write permission to the app/build folder.

blocks|key|122353|text|我也有同样的问题。这是由于路径中的假名称。路径中有一个特殊的字符，例如:+C:\User\My+App\Projekte-Tablet&Handy我删除了"&“字符，它运行良好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122354|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 had the same problem. it was due to false name in the path. there was a special Character in the path like this:
C:\User\My App\Projekte-Tablet&amp;Handy
i deleted the "&amp;" character and it worked well.

blocks|key|122371|text|我的问题是在文件名中包含分钟-当生成的文件为appname_debug_0.9.0.1_170214_2217.apk时，它会查找appname_debug_0.9.0.1_170214_2216.apk，因此输出文件名代码(从其他地方捕获)显然是从构建中的两个不同点调用的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122372|applicationVariants.all+{+variant+->
++++++++variant.outputs.each+{+output+->
++++++++++++def+project+=+"appname"
++++++++++++def+SEP+=+"_"
++++//++++++++def+flavor+=+variant.productFlavors[0].name
++++++++++++def+buildType+=+variant.variantData.variantConfiguration.buildType.name
++++++++++++def+version+=+variant.versionName
++++++++++++def+date+=+new+Date();
++++++++++++def+formattedDate+=+date.format('yyMMdd_HHmm')

++++++++++++def+newApkName+=+project+%2B+SEP+%2B+/*flavor+%2B+*/+SEP+%2B+buildType+%2B+SEP+%2B+version+%2B+SEP+%2B+formattedDate+%2B+".apk"

++++++++++++output.outputFile+=+new+File(output.outputFile.parent,+newApkName)
++++++++}
++++}|code-block|syntax|javascript|122373|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|$]]

My problem was including minutes in the file name - it looked for appname_debug_0.9.0.1_170214_2216.apk when the generated file was appname_debug_0.9.0.1_170214_2217.apk so the output filename code (nabbed from elsewhere) was clearly being called from two different points in the build.

<pre><code>applicationVariants.all { variant -&gt;
 variant.outputs.each { output -&gt;
 def project = "appname"
 def SEP = "_"
 // def flavor = variant.productFlavors[0].name
 def buildType = variant.variantData.variantConfiguration.buildType.name
 def version = variant.versionName
 def date = new Date();
 def formattedDate = date.format('yyMMdd_HHmm')

 def newApkName = project + SEP + /*flavor + */ SEP + buildType + SEP + version + SEP + formattedDate + ".apk"

 output.outputFile = new File(output.outputFile.parent, newApkName)
 }
 }
</code></pre>

blocks|key|122580|text|对我来说问题是，不知何故，它真的找不到apk，而apk却存在。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122581|The+APK+file+/Users/Paul/AndroidStudioProjects/android-tv-launcher/ui/build/outputs/apk/nameofapk.apk+does+not+exist+on+disk.
Error+while+Installing+APK|code-block|syntax|javascript|122582|我所要做的就是右键单击apk-copy相对路径，然后|122583|adb+install+-r+<paste+of+relative+path>|122584|而且apk已经安装好了，可以运行了。对我来说，这个问题发生在OSX上。|122585|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]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

The problem for me was that somehow it could really not find the apk, while the apk exists.

<pre><code>The APK file /Users/Paul/AndroidStudioProjects/android-tv-launcher/ui/build/outputs/apk/nameofapk.apk does not exist on disk.
Error while Installing APK
</code></pre>

All I had to do, was right click on the apk-copy relative path, and just

<pre><code>adb install -r &lt;paste of relative path&gt;
</code></pre>

And the apk was installed and good to go.
This issue happened on OSX for me.

blocks|key|122587|text|2018年5月，新的Android+Studio+3.1解决了这一问题。删除应用程序文件夹中的.gradle、.idea和build目录。然后尝试再次运行它，您将不会看到错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122588|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|$]]

Solved in may of 2018 with the new Android Studio 3.1. Delete the .gradle, .idea and build directories inside your app folder. Then try to run it again and you won't see the error.

blocks|key|123149|text|我更改了一点build.gradle文件的信息，然后点击“立即同步”，就好了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|123150|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 change build.gradle file a litle info,and click "Sync Now",just ok.

blocks|key|125186|text|删除目录~/..gradle/cache/。在Android+Studio打开时执行此操作是可以的。(请参阅pm安装错误的包名称)按下Android+Studio上的“与Gradle文件同步项目”图标运行项目，远程路径将是正确的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125187|请参阅answer+@+Android+Studio+gets+package+name+wrong+when+running+.apk|offset|length|125188|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/22155938/android-studio-gets-package-name-wrong-when-running-apk^0|0|C|1K|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

Remove the directory ~/.gradle/caches/. It's OK to do this while Android Studio is opened. (Refer pm installing wrong package name)
Press "Sync project with Gradle files" icon on Android Studio
Run the project and the remote path will be correct.

Refer answer @ <a href="https://stackoverflow.com/questions/22155938/android-studio-gets-package-name-wrong-when-running-apk">Android Studio gets package name wrong when running .apk</a>

blocks|key|2679596|text|确保在您的日志-in案例中生成的路径中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679597|2679598|+/Users/MyApplicationName/app/build/outputs/apk/app-debug.apk|blockquote|2679599|2679600|2679601|文件夹“output”确实有一个"apk“文件夹。|2679602|这就是我的问题，如果它不在那里，你需要按照下面的截图在gradle中运行"assembleRelease“任务；|2679603|​|2679604|📷|atomic|offset|length|2679605|然后，将生成该文件夹。|2679606|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/64fba39be159440500ca858407471a31.png|imageAlt^0|0|0|0|0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|14|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|15|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|17|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|18|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|19|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1A|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|1B|8|@]|9|@$Q|1C|R|1D|1|1E]]|A|$]]|$1|S|3|T|5|6|7|1F|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11|12|-4]]]]

Make sure that in the path generated in your logs -in your case: 

<blockquote>
 /Users/MyApplicationName/app/build/outputs/apk/app-debug.apk
</blockquote>

folder "outputs" indeed has an "apk" folder.

That was my problem, if it's not there, you will need to run the "assembleRelease" task in gradle by following the below screenshot; 

<a href="https://i.stack.imgur.com/3nPDu.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3nPDu.png" alt="Steps to run the gradle assembleRelease task"></a>
Then the folder will be generated.

blocks|key|125239|text|上面没有什么对我有帮助，但我通过在Build+Tools面板中切换到另一种风格，然后切换回所需的风格来解决这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125240|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|$]]

Nothing above helped me, but I figured this out by switching to another flavor in the Build Tools panel and then switching back to the needed one.

blocks|key|2679672|text|修改file:build.gradle(应用程序目录)。其实:你不应该改变这个文件，只有通过这个来获得同步提示，然后同步项目。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679673|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|$]]

modify the file:build.gradle(app directory).
in fact:you should not change this file , only by this to get sync tips,then sync project.

blocks|key|123235|text|该按钮名为“与Gradle文件同步项目”，其外观类似于：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|123236|📷|atomic|offset|length|123237|..。当更新版本号时，总是需要点击它，这会导致另一个APK文件名(除非文件名没有改变，否则安装软件包总是有效的，这暗示着文件名正在被缓存)。等效的Gradle+CLI选项显示为--recompile-scripts。|style|CODE|123238|@请参阅Appendix+D.+Gradle+Command+Line。|123239|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b666b843b9e572eafd2443e6648f92a0.png|imageAlt|1|LINK|MUTABLE|url|https://docs.gradle.org/current/userguide/gradle_command_line.html^0|0|0|1|0|0|2G|J|0|4|V|1|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|11|8|@]|9|@$E|12|F|13|1|14]]|A|$]]|$1|G|3|H|5|6|7|15|8|@$E|16|F|17|I|J]]|9|@]|A|$]]|$1|K|3|L|5|6|7|18|8|@]|9|@$E|19|F|1A|1|1B]]|A|$]]|$1|M|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T|U|-4]]|V|$5|W|Q|X|A|$Y|Z]]]]

The button is called "Sync Project with Gradle Files" and it looks alike: <a href="https://i.stack.imgur.com/YKOrS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YKOrS.png" alt="Gradle Sync"></a>... always need to click it, when updating the version number, which is resulting in another APK filename (unless the filename has not changed, installing the package always works, which hints for, that the filename is being cached). The equivalent Gradle CLI option appears to be <code>--recompile-scripts</code>.

@see <a href="https://docs.gradle.org/current/userguide/gradle_command_line.html" rel="nofollow noreferrer">Appendix D. Gradle Command Line</a>.

blocks|key|123241|text|首先通过编辑配置移除清理程序，它可能会在构建apk之后清理构建。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|123242|Click+on+edit+from+set+run/debug+then+click+on+gradle+list+select+the+clean+project+item+and+then+click+on+-(top+2nd+from+left).|code-block|syntax|javascript|123243|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|$]]

First remove cleaner by going to edit configuration, It may be cleaning the build after building the apk.

<pre><code>Click on edit from set run/debug then click on gradle list select the clean project item and then click on -(top 2nd from left).
</code></pre>

blocks|key|125123|text|使用Android+Studio2.2.1，我从顶部的下拉列表Tools>Android中点击了Sync+Project+with+Gradle+Files选项|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125124|类似于上面发布的答案，请参见下面的屏幕截图，了解如何访问此选项。|125125|​|125126|📷|atomic|offset|length|125127|125128|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/696e30ea74090fa791533d4113ec9508.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]]]]

Using Android Studio 2.2.1, I clicked the Sync Project with Gradle Files option, from the dropdown at the top, Tools>Android

Similar, to an answer posted above, see below for a screenshot of how to get to this option.

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

blocks|key|123359|text|++++1)+This+problem+occure+due+to+apk+file+.if+your+apk+file
++++++++(output/apk/debug.apk)+not+generated+in+this+format+.+

++++2)+you+should+use+always+in+gradle+file+.

++++buildTypes+{
++++++++++++release+{
++++++++++++++++minifyEnabled+false
++++++++++++++++proguardFiles+getDefaultProguardFile('proguard-android.txt'),+'proguard-rules.pro'
++++++++++++}
++++++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|123360|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> 1) This problem occure due to apk file .if your apk file
 (output/apk/debug.apk) not generated in this format . 

 2) you should use always in gradle file .

 buildTypes {
 release {
 minifyEnabled false
 proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
 }
 }
</code></pre>

blocks|key|2679896|text|我是通过以下方式来实现的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679897|2679898|从Android+Studio欢迎窗口(或文件>新建)关闭项目|ordered-list-item|2679899|，单击导入项目。|2679900|2679901|我猜这迫使它重新安装APK，现在一切都运行得很好。|2679902|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|N|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|P|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|L|$]]

I got it to work by:

<ol>
<li>Closing the project</li>
<li>From the Android Studio Welcome Window (or File > New), click on Import Project.</li>
</ol>

I guess that forced it to reinstall the APK, and now everything is running fine.

blocks|key|122572|text|我解决了这个应用程序|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122573|122574|First+Build+->+Build+Apk(S)|ordered-list-item|122575|立即运行应用程序|122576|122577|如果不起作用，请清理并构建项目，然后再次执行1和2。|122578|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|N|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|P|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|L|$]]

i solved this app by doing 

<ol>
<li>First Build - > Build Apk(s)</li>
<li>Run the app now</li>
</ol>

if it not worked do Clean and build the project and then do again 1 &amp; 2.

blocks|key|122606|text|我尝试了所有这些方法，但都不起作用。我最终不得不在同一时间做几件这样的事情。非常令人沮丧的是花了这么多时间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|122607|我遇到的问题与在升级到AS3.1之后运行单元测试有关。|122608|这就是我所做的。1.)运行/编辑配置/选择测试...2.)向"Gradle-aware+Make“3添加选项。)在“其他”选项卡上选中“如果ADK未更改，则跳过安装”复选框|122609|祝好运。|122610|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|$]]

I tried all of these things and none of them worked. I ended up having to do a couple of these things are the same time. Very frustrating that it took this much time.

The problem I had was related to running my unit tests following the upgrade to AS 3.1.

Here is what I did...
1.) Run / Edit Configurations / Select Tests....
2.) Add options to "Gradle-aware Make"
3.) Select check box "Skip installation if ADK has not changed" on Misc tab

Good luck.

blocks|key|2679967|text|转到android+studio>create+'Build+APK(s)‘顶部栏上的Build选项，一旦build创建完成，打开可用的文件夹(+app+\build\outputs\apk)，然后关闭文件夹all....then+try+to+install+the+app。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2679968|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|$]]

Go to Build option on the top bar of android studio>create 'Build APK(s)', once build has created, open the folder where it has available(app\build\outputs\apk) then close the folder, that's all....then try to install the app.

blocks|key|125218|text|通过更新Android+SDK-Build工具解决了此问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125219|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|$]]

Solved this issue by updating the Android SDK-Build Tools.

blocks|key|125604|text|在我的例子中，只是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|125605|Gradle视图>工具窗口>+Gradle+>右键单击项目>刷新Gradle+|125606|+|blockquote|125607|125608|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

in my case, just 

<blockquote>
 View > Tool Windows > Gradle > right click [project] > Refresh Gradle Project
</blockquote>

blocks|key|2680282|text|assemble[Variant]将在磁盘上为您生成应用程序密钥，尽管不需要使用它来调试应用程序。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2680283|在工程根目录下执行以下命令：|2680284|$+./gradlew+clean+build+assemble[Variant]|code-block|syntax|javascript|2680285|总帐|2680286|entityMap^0|0|H|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|V|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

<code>assemble[Variant]</code> would generate the APK for you on disk although it should not be necessary to use it to debug the app.
Run the following command in the root directory of the project:
<pre><code>$ ./gradlew clean build assemble[Variant]
</code></pre>
GL

When I am trying debug application on Android Studio gives this log output : 

<blockquote>
 The APK file
 /Users/MyApplicationName/app/build/outputs/apk/app-debug.apk does not
 exist on disk.
</blockquote>

I restarted Android Studio, but I can't solve this problem . How can I solve it ? 
Thank you

The APK file does not exist on disk

当我尝试在Android Studio上调试应用程序时，会给出以下日志输出：磁盘上不存在APK文件/Users/MyApplicationName/app/build/outputs/apk/app-debug.apk 。我重启了Android Studio，但我无法解决这个问题。我该怎么解决它呢？谢谢

问磁盘上不存在APK文件
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