Develop Reference

Unable to resolve target 'android-18' error

i am unable to download target android-18 file

In ``default.properties` file .
set target=android-18.
Check also that you installed this API level and check it in properties window, like:
In my case 17 is selected

Right click on your project select Properties(Alt+Enter),
goto Android(Project build Target)-> Check Android 4.2.2 or earlier version which you have, click on Apply-> OK, that's it.
finally clean your project, Done!!

First open Android SDK Manager and check whehther API18 (Android 4.3) SDK platform is downloaded or not. If not download it by selecting check box then accept license and press install package.
Next close and open eclipse again.
now it will show API18 (Android 4.3) SDK platform in Android SDK Manager as installed.
after that select project -> Properties -> Android -> mark checkbox Android 4.3 in project build target ->apply ->ok.
select project -> project-> clean.

I thing u r importing Project in eclipse some Android Project Not Find Target sdk So we Add target sdk like Right Click on ProJect GO To Properties GO to Android and Select Taget if Not Install than Download Adt plugin For Eclipse

The error is well justified, either you dont have correct properties added or you are missing the SDK.
Please check this link,
Unable to resolve target 'android-XX'
Hope it helps

android studio new project missing folders

I have created a new project using the latest version of Android Studio (0.2.2), this is a fresh install of studio. When I am in the project explorer view, it fails to show me any folders for my project. I should see a root project folder, and within it the .idea, gradle, and module folders, but they are not showing.
Here is what I expect to see (taken from the sample project created on first boot):
But here is what I see immediately after the project's creation:
I cannot figure out how to expose my project's folders! I do not want to develop without the project explorer, it's simply too much of a hassle. Did I create the project incorrectly, or am I missing some not-so-obvious setting somewhere?
Thanks.

The problem here is that I assumed android studio would create a module for the application. I assumed this because it asked me at the beginning for app name, module name, package, sdk info etc.
This assumption turned out to be false. You must create your first module manually through File > Project Structure. After that is done, the project explorer shows the files.

File -> Project Structure -> Modules
Add Button (Green plus button) click -> New Module Select
New Module window -> "Content root" change path button click to select "Project root file path"
Apply to change save and "OK" button exit.

In the project Explorer there is a drop down menu where you have selected project, now change it to project files.
I hope this will solve your problem. reply if it didn't.

You have created a new gradle project not a new android project.
Update your android studio tools to 0.2.3 - Go to Help menu - select check for update.
then Update your android sdk tools, android support repository, android support library and android build tools using android sdk manager.
And update some configuration in project structure. Go to File menu->project structure -> in projects tab select Android SDK as default sdk and in SDKs tab set correct path to updated android sdk.
Now restart android studio and try to create a new project and it should work fine.

(Noted for posterity) I had a similar issue come up recently, when importing an Eclipse android project. The issue was that the source folder wasn't added as such. I had to manually go into Project Structure -> Modules -> Sources and make sure that the "src" folder wasn't excluded and was marked a source folder.

Although this question is asked years ago. But now following simple solution worked for me.
Clicking 'Sync Project With Gradle files' makes all directories visible.

I had this exact same issue, there are some problem if you upgrade from 0.1.9 version to 0.2.0 in Windows.
Android Studio 0.2.0 Release
The solution (which worked for me) was to completely uninstall Android Studio and reinstall the 0.2.0 version.

I had the same problem today. Additionally, the IDE posted an "Assertion Error" into its event log.
Downloading and reinstalling the preview version, then applying the patch to 0.2.6 worked for me.

Change the SDK to a level that you have installed in the SDK manager. The SDK manager can be accessed from Tools -> Android -> SDK Manager. For me, Android Studio was packaged with API Level 17 but the new project wizard tried to target API Level 18.

Importing libgdx project into Eclipse Juno error Cannot find .apk

I am just starting to learn Libgdx, and am in the process of importing the 4 projects[desktop, main java game, android, html] into Eclipse Juno. I have not added any lines of code, just trying to get them to run on the different platforms.
It runs fine on the desktop version, but when I tried to run it in the Android emulator I get the error. Cannot find mygdxgame.apk!
I realized that my gen folder is completely empty, there is no R.java for the project. I have tried a number of things to make this work, but none of it is working. I am listing the things I have tried so far, and the hopefully the reason why I am asking this repeatedly asked question.
Project > Clean
Package Explorer [right click on my project] > Android Tools > Fix Project Issues
Deleted gen folder and Project > Clean
Restarted Eclipse
Deleted the project and Imported it again
Set Compiler Compliance Level to 1.6 for both main java game and Android project
Added a dummy XML to the android project and tried clean, and deleted it
Unchecked and rechecked Build Automatically
Checked my target-sdk in project.properties and made sure it is the same Project Properties -> Android and in my Manifest.xml
[Right click on project] > Properties > Java Build Path > Source tab, Removed mygdxgame/gen folder and then added it again
Made sure Project Properties > Android > Is Library is unchecked
Nothing has worked so far. My gen folder is still empty and I am unable to run the Android project because of the same error. Cannot find mygdxgame.apk!
What else can I do to fix this? In case this is answered I would appreciate someone giving me a link to the solution, as I have been pouring through SO and Google in general for nearly 2 hours now, with no success.
Regs

What happened to me a few days ago:
1.- I got the SDK Tools 22 update and I installed it, no other update appeared in my sdk manager... so I closed it.
2.- Then I got that "NO APK" error and tried every answer I could find.
3.- I opened SDK manager again, and I noted SDK Platform Tools also got an update and there was a new one: SDK Build Tools. Both of them didn't show up when I first updated the SDK Tools.. so.
ANSWER:
Open SDK Manager and check if your SDK Tools, SDK Platform Tools, SDK Build Tools are updated :)

On your build path, you should have a reference to the main project, under Projects tab of Java Build Path. Under Libraries, you should have gdx-backend-android.jar and gdx.jar along with Android not being a library.
Please check if Android is set as a library. If so, uncheck it. To do that, right click on the project and then select Properties. Choose Android on the left panel of the new window. Uncheck Is Library if checked.
Here's something might help-
Unable to run Android app, Could not find .apk issue in eclipse

I would take alook at your buildpath if all libs are correct. If it's a projekt from an other computer the libs are often at different places so you need to correct those manual. If they are not correct the android projekt do not generate your R. class and so on. So do rightclick on the core projekt -> Buidl Path -> Configure Build Path. Now take a look at the libs if all are there. I had the same issue with the android 15 apk so i need to add it manual. The clean or such do not fix such because eclipse can't know where you have all your libs.
If you really dont get it run i would recoment to use the setup ui of libgdx. It does noramlly handle all imports and so on for you. You can also use it to update your current projekt and so on.
Else i would read the guide for Manual Project Setup of Libgdx.
Libgdx setup Guide
I hope this does fix it.

unable to get system library for the project on eclipse ide

I was working on an android tutorial and it wanted me to import the library from another project .The import worked and the project works correctly. But I noticed that doing that messed up several of my other projects (the ones that use Android 2.1) by apparently messing with the build path. Now instead of seeing "Google APIs [Android 2.1]" under the gen folder I see "Unable to get system library for project".
I verified the following:
I right-clicked the project and went to Properties I see that the correct Project Build Target is checked(Google APIs [Android 2.1]), but "Unable to get system library for project" is still shown above the assets folder and below gen and Android Dependencies. Cleaning all projects doesn't help.
How can I fix this problem?
is there a way to fix this issue globally or do I have to do it one by one?

I had the same problem. Try
Right click on your project
Go to properties
Click the Android section
Select a different target api (assuming one is already selected, as mine was - otherwise, select the one you want and jump to step 9)
Click OK
Do steps 1-3 again
Select your original target api
Click OK
Clean and build your project
Worked for me, anyway.
Derived the solution from:
"Unable to get system library for project" after I upgraded to Android SDK 2.3 and ADT 8.0

Error in .classpath on your project. It not connect to android sdk. Fix it and clean project. :-)

This happens when you are targetting an API version that for some reason is not mapped on your buildpath.
See which is the version of the SDK you are pointing to at the project.properties file.
Go to the SDK Manager at Window->Android SDK Manager
Check the Android API item that matches the version you want to use, OR, click on the latest one and then update your project.properties file.
Make sure your project build configuration is Project->"Build Automatically"
Retsart Eclipse (claning and rebuilding may not refresh all the project properties)

Borrowing from #Erhannis answer :
"
Right click on your project
Go to properties
Click the Android section
"
When I view the build target everything looked fine :
So I checked another build target , hit apply, and then re checked my original build target (Android 4.4.2) and re-hit apply. My project then compiled.

For me the project.properties file was missing (it was code from a repo I checked out). So I just created one with this line:
target=android-20
After that, Erhannis' solution worked for me.

Just for completing Erhannis answer: If you fixed the problem but it appears again when you restart Eclipse, then just go to the file local.properties on your workspace folder and verify that the location of the Android SDK there is correct.

At times, when only single Android SDK version is installed on your system, and if it gets changed either by un-installing / re-installing Eclipse, or otherwise (directly through SDK Manager), then this issue might crop up.
.
This is accompanied by the message like this on Eclipse console:
YourApp] Unable to resolve target 'android-22'
.
A simple workaround to this issue is:
Open AndroidManifests.xml of the project, and in the:
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />
change the targetSdkVersion to the one currently installed on your system
Next, open the project.properties file and update
target=android-21
to your current SDK version
Finally, clean and re-build the project

Right Click on Project-> Select Android tools -> Select Fix Project Properties
This did the trick for me.

You need to click on the menu icon with the Android sitting in the grey box with a white arrow pointing down "Opens the Android SDK Manager".
or, from the command line, run:
%ANDROID_HOME%\tools\android sdk

could not find apk in android

I am using spring and maven plugins in eclipse but when i want to run this project it returns Could not find ShopZilla.apk? How this will resolved, Please suggest me.

Make sure after updating your android sdk sdk build tools are updated properly. You can check it by Open sdk manager -"Android Sdk Build Tools" status must be installed. if the status is not installed then install Android Sdk Build Tools for the same.

If you have got all required plugins installed (ADT, M2E and M2E Android), the apk should be automatically generated by IDE.
Sometimes the apk file is not generated simply because there are some android build error in your project, unfortunately, these are not compile error so they are not shown in Eclipse problems view. For example, if you attach a icon.jpg file in your res/drawable folder and change the extension to png, you get no compile error in problems view, but if you then manually delete the apk file in your project output folder, the apk file will not be generated again and in this situation Eclipse only gives very generic message "could not find *.apk file" in console view, when you trying to run it on emulator.
Now the only question is how can we tell if there are android build error. right click your project, choose Android Tools -> Fix Project Properties. in my jpg/png example, Eclipse will show "libpng error: Not a PNG file, ERROR: Failure processing PNG image C:\android-sandbox\source\yourproj\res\drawable-mdpi\icon.png" and project marked as a error in package explorer view. as soon as you replace icon.jpg with a real png file, bingo, apk automatically generated. Though I am not sure if this can detect all subtile android build error.

If you are using the ADT plugins greater than ADT17 then rename your "lib" folder to "libs".
Then Right click on project => Android tools => Fix project Properties => Clean your project
If still issue then just restart your eclipse. Your issue will be gone.

Please follow these steps; this might help you out:
Go to Project->Properties
Select Android from left-hand side list
Uncheck the "Is Library" checkbox
or
projects -> clean