I started working on a new app (min API: 24, target/compile: 27) yesterday and updated Android Studio to version 3.6 after creating the project. Now I keep running into the same problem over and over:
When I add a new UI item with an id or if I change an existing id, then access the e.g. R.id.activity1 in my code, there's no suggestion popup for the id. When I just type it out, the code turns red and it's marked as an error on the sidebar and in the class name. The app still builds and runs fine.
Contrary to this question not all of the R occurances are marked though, only the ones that I changed/created since the last restart.
What I've tried:
Build - Clean Project
Build - Rebuild Project
File - Sync Project with Gradle Files
Neither works. I have to restart Android Studio to get rid of the fake errors (no need to invalidate caches).
The gradle file looks fine as far as I can see (appcompat and design are version 27.1.1) and there's only a single error in the xml files that is connected to the problem:
This project contains Java compilation errors, which can cause
rendering failures for custom views. Fix compilation problems first.
How do I fix this, so I can actually create/edit ids without restarting Android Studio every time?
This question already has answers here:
Unable to execute dex: Multiple dex files define Lcom/myapp/R$array;
(54 answers)
Closed 8 years ago.
Is it my code or is running Eclipse on Ubuntu linux (or any other distro variant) causing this error message to show very often? Either when trying to compile, build project, or an equivalent, the error comes from the IDE itself. I read many questions in here that asking about maybe the same case that I have, like if the error message shows up you need to restart Eclipse and the error won't appear again.
Now I have one project thats using #override code like OnCreate, OnPause, OnStop and others on my script MainActivity.java. There is nothing wrong with the code, but everytime I try to run it as an android application, Eclipse shows an error like this:
Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Landroid/support/annotation/AnimRes;
Why is that? Has anyone had the same problem and discovered the answer? Many thanks.
Regards,
Indra.
This is due to multiple occurrences of the same jar file getting added to your project. Generally, it is very difficult to find out multiple occurrences.
It would be better to remove the classpath of all the reference Android projects which our project is referring, and add them from the scratch.
Follow this procedure:
Build the Android libraries first and make sure the jars required for building the Android projects are not exported
Add the Android libraries in the project.properties of the Android project
Compile the required project
When a compilation issue comes, add the required jar
Don't forget to export the jar
I think it is related to the fact that there may be 2 jar files containing the same content. Check your build path and library projects and if you see same thing referenced twice remove it from one place.
I think you have to clean your project and rebuild it. because The temp values might have been available. When you clean it, this app will work and you can take build now
I'm trying to build a new Android project. It is my first time playing around with Android Studio. Please note I am not a Java expert.
I have included Facebook SDK, and since then it is giving me this error:
Gradle: Execution failed for task ':PROJECTNAME:dexDebug'.
> Running C:\Program Files (x86)\Android\android-studio\sdk\build-tools\android-4.2.2\dx.bat failed. See output
I have tried finding out online what could be wrong, but I didn't find anything.
Also I have no idea how to see the output, some blog websites recommend to run with "--stacktrace", but I have no idea how to add options to rebuild my project.
I just click on Build -> Rebuild Project
Could anyone please help me ?
Thank you!
Here is my own answer, I think I figured it out:
1) To debug the project (at least with Windows). Open CMD.exe, then navigate to your project folder. Then write: "gradlew build --info"
2) This showed me this message:
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Landroid/support/v4/app/Activ
ityCompatHoneycomb;
Following some information on different blogs, I found one solution, I removed this dependency from my project (but kept it in facebook):
compile files('libs/android-support-v4.jar')
This worked and compiled successfully.
I have updated to the latest Android SDK and set JAVA_HOME in .bash_profile using
export JAVA_HOME=$(/usr/libexec/java_home), and I'm getting the following error:
Error Gradle:
FAILURE: Could not determine which tasks to execute.
* What went wrong:
Task 'assembleDebug' not found in project ':CrystalBall'.
* Try:
Run gradle tasks to get a list of available tasks.
Error: Could not execute build using Gradle distribution
http://services.gradle.org/distributions/gradle-1.6-bin.zip
I've attached a screenshot:
What should I do?
The second error in your screenshot seems more important to me. You have to make sure, that the Android Studio is able to download and execute the gradle binary. If you are using a proxy you have to configure it in the Android Studio.
To check the gradle tasks, go to your project folder on the command line and type "gradlew tasks"
You can also configure a proxy for gradle. Just create a gradle.properties file in (your project folder) with these properties:
systemProp.http.proxyHost=www.example.org
systemProp.http.proxyPort=8080
systemProp.http.proxyUser=userid
systemProp.http.proxyPassword=password
systemProp.http.nonProxyHosts=*.nonproxy.com|localhost
I don't believe this is the issue the poster had, but for the benefit of others I'll add what I found as I was helping someone on Windows XP who was getting the same error.
It appears the issue in his case was that the path to the Android Studio project had spaces in it (since Windows XP uses the Documents and Settings directory). I had him generate a new project into a directory without spaces in it and it built and ran without problems. Might have actually been something else, but as usual it is best to avoid spaces in paths.
I'm on Eclipse for hours now and I didn't found a solution yet for my problem even after many searches on internet: I have no more R.java file on my projects.
On just created or on my old projects, i don't have R file anymore and I tried so many solutions (uninstall, re-install Eclipse, clean my project, check all my XMLs, fix problem with android tool and so on ...)
Please someone can tell me what to do in this case?
Hey If you just updated to ADT Rev 22 :
I had the problem too. There is a new component in the Tools folder called "Android SDK Build-tools" that needs to be installed.
Step 1
Open the Android SDK Manager
Step 2
Select the newly added Build Tools and install. (If problem stays then go to Project Properties => Java Build Path => Order and Export and check Android Private Libraries, then clean and build project.
It may be necessary to repeat the process, restart the SDK Manager after the update and make sure it looks like this (all tools installed):
More info:https://groups.google.com/forum/?fromgroups=#!topic/android-developers/rCaeT3qckoE%5B1-25-false%5D
Perhaps in Project Properties -> Java Build Path -> Libraries you don't have:
Android 4.2.2 (or other version)
Android Dependencies ?
If so, then right click project - > Android tools -> fix android properties
and see if this library showed up.
Thank you all for saving me! I've spent the whole afternoon on search this error.
Finally, my project works.
By the way, I also encountered one problem which i wanna share with you:
After upgrading, even if my project has not errors anymore. During runtime, it seems it couldn't find the classes from the jars placed in \libs.
Go into Project=>properties => Java build path= > Order and Export.
Please make sure all your jars are checked.
If this problem occurs suddenly in a well working project,
the first step is to find whether the problem occurs only in the current project or in all other projects.
if all other projects in the current workspace are working then 90% problem is with XML / mainfestfile/resourse file that you edited recently.
This error is not shown as red mark we have to find out what we have done recently in these files.
try this
sudo apt-get install lib32stdc++6 lib32z1 lib32z1-dev
it solved my problem
Close your eclipse and after refreshing system, try to open Eclipse again. I think you are using Emulator along with the eclipse. It may be because of the low Memory problem (RAM) of your system. I used to face the same problem when I use Emulator
whenever there is any mistakes in any of the xmls the R goes missing when a build or clean happens so check for any xml errors in your project unless you fix it you cant get back your R on clean or build. fix the xml files and perform a clean you will have the R generated. Also check in File->properties->Builders and see if everything is checked
I was using Eclipse Indigo and nothing I tried worked. I ended up downloading Juno SR2, reinstalling the ADT, and now everything works again.
Reinstall everything and it'll work.. i.e. go back to Google SDK or w.e. you're using and download it.
Update it to latest in SDK Manager.
Go into Eclipse-Project-Prefs-Java build path-order/export TICK EVERYTHING.
problem: No R file get generated.
guess: Try cleaning project if it is old one. Else create new project with no R get generated and with no compile errors but this: no project.apk
In this case you have to check your SDK for the built-tools. May not be installed after updating SDK.
Thus download them if not download here, then put them under directory: SDK/built-tools folder. Lastly, and most important, is to Run the SDK As Administrator. This guarantees refreshing SDK with all packages appearing in it.
Install the SDK-Built-Tools or any missing packages according to the above link and you're done.
hope this helps.
Try one thing, create a new Android Project and transfer all those files which are in the previous project. That worked for me.
In my case there is error due to "&" inside strings.xml file(but error not shown) for declaring string for a array type. Now the problem has been solved as I changed "&" to "and".
So, please make sure that you do not have such silly use of symbols, and clean the project.
I have had the same kind of problem, however Rechecking all XML files in the Resources folder was helpful in my case. I found syntax error in my XML files. Cleaning and building the project again can be helpful sometimes too.
I had the dreaded not more R.java.
Some of the things I've used in the past:
Clean / rebuild (the first thing we all try)
Restart eclipse (optionally reboot pc/mac)
Update both SDK/ADT eclipse plugin to latest version
Create new eclipse workspace and import project
Enable Verbose AAPT build output Eclipse menu>Preferences>Android>Build
Port project to Android Studio / Gradle (this helped my actually see the AAPT error i was getting Error Code:138)
Delete recent XML changes - Ultimately I found deleting recent menu.xml files I'd added and commenting out where they were referenced fixed the issue and I finally got R.java.
I got the error recently and had found no fault in any layout or value file. After a lot of tries I add another Activity and the R.java was build and the error disappeared. I don't know why this occur, but it takes me hours.