After a successful import of an Eclipse-Android-Project into "Android Studio 1.4", I get the error
"Please select Android SDK"
when I click on the button to run the application in the simulator, I can't find any way of doing that.
This dialog opens when I click on "run":
This is the "project structure" dialog:
What should I do now?
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Selecting the Android SDK in Android Studio is a crucial step when developing Android applications. Here are the step-by-step instructions on how to do it:
1.Open Android Studio
2.Just click file and click on project structure
3.And then you can click modules and then you can show compile sdk version you can chaing it you can select Compile sdk version
4.You can also chaing Target sdk version
5.Sync Project & Rebuild project Again.
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Sync didn't help me. Neither helped invalidating cache. I simply removed and cloned again the repository and it worked:
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I get this error on Android Studio 4.0.1. Here is my solution: Go your build.gradle(Module: app) file and then update compileSdkVersion and buildToolsVersion.
android {
compileSdkVersion 30
buildToolsVersion "30.0.2"
}
MY SOLUTION
This bug drove me crazy. No amount of syncing fixed it. I found that if I modified my module's build.gradle (by maybe adding a blank line or a space after a line), and then syncing that file, all is good.
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The menu structure and options have changed slightly as of Android 3.2.0. I fixed this error by changing the Module SDK in the following menu:
File > Project Structure > Modules > App File > Dependencies Tab > Module SDK
Make sure to hit Apply to save your changes.
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Go to : File > Project Structure > Modules -> app > Properties
please choose : Compile 'SDK' version = API26 Build Tools
Version = 27.0.0 Source Compatibility = 1.8 Target Compatibility =
1.8
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I just change the minSdKversion to 23 like:
andriod {
compileSdKVersion 27
defaultConfig {
minSdKversion 23
}
}
Press " ⌘ + Shift + A" on Mac (or "Ctrl+Shift+A" on Windows) and in the pop-up EditText, write "Sync Project with Gradle Files". After that double click on the appeared option. It will then sync your Gradle file SDK with the project file.
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You have to Select Build Tool Version from your project setting.
Select Project App Folder
Press F4 OR Right Click on Project App
Folder and open Module Settings In The Properties tab select Build
Tool Version from List
This will work on my side i hope it will help you.
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In my case I downloaded a git repository for an android project. The project required minimum sdk version 21 and target sdk version 27. When I tried to run the project it gave me "Please select Android SDK error". I checked that I had already downloaded the required sdk files.
For me the solution was to "sync project with Gradle Files"
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Now on Android Studio 3 and above, you can try to sync project with gradle like:
File -> Sync Project with Gradle Files
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I had the similar problem. I tried sync with gradle files and removed .idea folder but nothing works.
Here is what worked for me :
1.) Close android studio
2.) Remove c:/Users/{User}/.AndroidStudio{version} folder
Caution: It will remove all your installed plugins and settings. Try this if nothing works
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I solved it with Android Studio 3.1.3:
That's it.
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buildToolsVersion might be missing in your app's build.gradle
buildToolsVersion "26.0.3"
Add it like this 
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Sometimes android studio just acts stupid and needs some kind of reset..
Go to settings.gradle file it should contain include ':app'
change it to include ':ap' and sync.
after sync, change it to include ':app' again.
It should be working OK now.
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There are multiple hit & trial solutions for this error. One of them will surely work for you. Below are the solutions:
1.
Tools -> Android -> Sync Project with Gradle Files (Android Studio 3.0.1)
Go to build.gradle and click sync now
Click hammer(Build) icon to sync Gradle
or edit any of your module Gradle and then sync
File -> Settings -> Android SDK -> Android SDK Location Edit -> Android SDK
Open build.gradle file, just add a space or press enter. Then sync project.
File -> Invalidate Caches / Restart
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In my case I had a double declaration of a dependency inside the project level build.gradle. Once I removed it, did a Gradle sync and it worked.
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The project depends on an SDK, and there is none. Go to File -> Project Structure (Edited: I said Settings before) Select Modules, and go to the Dependencies tab Likely you will see No SDK in the Export column. Choose one from the Module SDK dropdown, or create a new one if the list is empty. No SDK should now update to the selected SDK. It should work then... Hopefully. :) Regards
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After opening my project in Android Studio, I opened the App version of the build.gradle file, located in the Gradle Scripts folder of the Project. When I hovered my mouse pointer over the buildToolsVersion number, a tooltip popped, indicating that the version of Android Build Tools needed to be upgraded (see screenshot). I changed the value of the buildToolsVersion to the one identified by the error (27.0.2) and the problem was solved. The original error (Please select Android SDK) went away and the project compiled successfully, again. Although this solution was mentioned previously, the exact steps seemed to be missing, so hopefully this clears up any doubt. I guess the root cause for this problem is that a new version of the build tools were released but Android Studio did not trigger any notification to me, which would have indicated that I should manually fix this (since Android Studio does not seeem to have the ability to upgrade this build.gradle file internally), which leaves the onus on the user to find the problem and fix it.
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This worked for me.
File -> Settings -> Android SDK -> Android SDK Location Edit -> Android SDK
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There're bunch of answers, I tried to use one of those solutions by adding new line in build.gradle file, but it didn't work. Then I changed comileSdkVersion to another version and then changing it back to version I had. "Sync" button appeared. Pressing it, solved the issue for me.
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I had to bump kotlin version down to 1.2.31 from 1.2.41 for the run to be enabled. my environment: macOS - 10.13.4 (high sierra) AS version - 3.1.3
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In Android Studio 3 and above, for Windows, Mac and Linux:
File -> Sync Project with Gradle Files
Solved!
Or you can do this by shortcut key:
Press ⌘ + Shift + A (Mac) or Ctrl + Shift + A (Windows, Linux). Then pop-up a Edit-Text and write "Sync Project with Gradle Files". Then press double click on the option.
Your problem is solved! It'll sync your gradle file with your project file.
Screenshot:
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It helped me:
1. close project
2. remove .idea/ folder
3. select "import project (Gradle, Eclipse ADT, etc.)"
Environment:
Android Studio 3.1.3
OS Macos High Sierra 10.13.5
Another answers don't work for me.
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FIX FOR 3.1.2 OR NEWER VERSIONS
Some of my colleagues and I have faced the same issue on AS 3.1.2, but a simple Sync didn't help us. For us, the solution was a bit different:
EXTRA ADVICE IF YOU ARE FACING THIS ISSUE CONSTANTLY
Some of you are constantly facing this issue, and this "solution" fixes it only temporarily. At the time we started getting this error, we used gradle wrapper 4.6 and Android gradle plugin 3.1.0, but since then we went back to gradle 4.4 and we use it with the latest Android gradle plugin, and we haven't seen this issue since then.
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I was having this problem on all versions of AS 3.0+. Syncing with gradle did not solve the problem for me. The solution from András Klöczl was the only thing that would allow me to get some coding done. The problem was, anytime I had to do a gradle sync, the problem came back. So I had to go through that process any time I wanted to make a change in my build.gradle. What ended up working for me was to downgrade my kotlin version from 1.2.40 to 1.2.30
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If your android SDK path is given and still you facing this issue then it might because your android studio not synced well, even you have clicked on "Sync now" link.
So for re sync it go to app gradle file and make any change or just give a space and now sync again. It will work perfectly.
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The simplest solution for this problem:
First make sure your sdk path is currect. Then Please close current project and in android startup menu click on import project and choose your project from explorer. This will always solve my problem
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This is the easiest way to fix this issue:
Viola! You're done.
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Go to gradle.build file and click sync now OR click icon on Sync project with Gradle file
OR Go to Tools-> Android -> Sync project with Gradle file
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MY SOLUTION This bug drove me crazy. No amount of syncing fixed it. I found that if I modified my module's build.gradle in AndroidStudio (by maybe adding a blank line or a space after a line), and then syncing that file, all is good.
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If you are using 'Profile or Debug APK...', then you might come across this error.
My solution is to first check SDK for updates in SDK manager: click on "Edit" at the right side of SDK location and go through to install any updates:
Then I clicked on "Logcat" at bottom of Android Studio and find out I also need to configure Android SDK, so choose latest Android API Platform:
After that, I'm able to run the APK in Emulator.
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My problem was that if I changed the project (for example opened new window of Android Studio with different project) this error happened.
So I read every answer in this question and the "clear caches and open the project again" solution wasn't so useful in my case.
Instead I discovered that if the Kotlin's plugin's version in Android Studio was lower than in gradle file, the problem appeared.
My setup was:
What fixed the problem?
I updated the Kotlin plugin:
File -> Settings -> Plugins -> Install JetBrains plugin...
Then search for Kotlin and click Update. After update just restart the Android Studio and sync Gradle.
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Give SDK path in local.properties file as
sdk.dir=C\:\\Users\\System43\\AppData\\Local\\Android\\sdk
and give latest version in compilesdk in gradle file.
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Source Compatibility should be selected as the minimum Android Version that your app should be compatible with(usually selected as SDK 15), Target Compatibility should be selected as the newest Android Version that your app should be compatible with(SDK 23). Afterwards you want to check your AndroidMenifest and your gradle.build to see if its realy set to the properties selected if not you can just add it manually. and ofcourse you should check the SDK Location is actually pointing to your android studio SDK folder (if you are importing from Eclipse then you should point to your Eclipse SDK folder).
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The comment from @Nisarg helped: "set latest version in Compile Sdk Version"
I changed from API 8 to API 23 and the error message disappeared.
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Follow these steps:
Hope this helps.
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For those who are suffering from this problem, I suggest you do a clean install ( delete any existing settings and files of prior installations ). Don't waste time fixing the problem. I am searching for the answer for android studio 3.6.3 with no result.
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I go to build.gradle and click sync now. Then it worked.
Update :
File -> Sync Project with Gradle Files (Android Studio 3.1.1)
Tools -> Android -> Sync Project with Gradle Files (Android Studio 3.0.1)
Or You can click on the icon from the toolbar.
This answer may not help works for later version as Android studio Team work on making the tool more better, the way to sync may be different in the next version of Android Studio.
COMMON WAY that may helps is try to sync project and then Invalidate Caches and Restart Android Studio.
Solution for Android Studio 3.1.2 [See below answer]
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In latest android studio 3.3.2 the icon of sync project with Gradle Files is changed
Now try this
File->Sync Project with GradleFiles (Android Studio 3.3.2)
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Just go to the (app level) build.gradle file, give an empty space somewhere and click on sync, once gradle shows sync complete then the Error will be gone
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Press "Ctrl+shift+A" and in the pop-up EditText, write "Sync Project with Gradle Files". After that double click on the appeared option. It will then sync your Gradle file SDK with the project file.
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Click the File menu from the android studio.
File -> Settings -> System Settings -> Android SDK
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My problem solved by setting NDK path in Android Studio.
File-> Project Structure->NDK Location.
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You are using Google API SDK. This for some reason doesn't work anymore with the embedded java JDK / JRE.
Follow the solution I described here and set Android Studio JDK path to your local JDK (ex. OpenJDK)
Click this icon
to sync
gradleor edit any of your module
gradleand then sync