I have seen a repeated problem on my project when I upgraded from AS 4.1.2 to 4.2.1. I will make a simple change, and when I try to run (which invokes a build request) I see the error I have documented in this SO post.
I have also seen a problem whereby when I ask for a full rebuild (Build -> Rebuild Project) I get an error that AS cannot delete the 'build' directory. In fact, checking for the build directory in my file system shows that it is, in fact, gone. When I immediately request a rebuild a second time, it succeeds.
I have documented this in a bug report here.
I cannot imagine what setting might be in my project that could cause either of these errors, but hoping someone here might have an idea.
If I create a brand new sample project in the same top level directory (all my projects are in directories off of C:\BLD\AndroidStudioProjects), neither of the errors mentioned above occurs.
Related
I have an Android Studio (Bumblebee 2021.1.1) project, composed of a main app plus two imported libraries, one Java and one native, developed by me.
At a certain point in time - I cannot recall any event related to this, - the compiler has stopped recognizing the code changes.
If I write something random (e.g. my name, or "aaaaa") within a code that has thus far compiled successfully , the IDE marks this in red as error, however, when I press Ctrl+F9 ("Make Project"), the compiler does not detect any change in code and ends with "BUILD SUCCESSFUL". This happens also when I explicitly save the modified code. The only way I have to make the compiler detect the change is to launch "Rebuild Project". I have tried all the solutions proposed in Android communities (delete ".idea" and ".gradle" folders, invalidate cache, etc.), to no avail. To be noted that I have other projects on the same PC with the same Android Studio instance, but the always-successful-build only happens with the project mentioned above. Can anybody please help me? This is very frustrating, because, even for a tiny code modification, I have to rebuild all, which is very time consuming. Thank you very much.
I know this question has been asked before, but there wasn't a satisfactory answer, and the last post was three years ago.
I am using android studio 3.6.2 in windows 10. Every time I try to compile my program I get the error
"The process cannot access the file because it is being used by another process."
Now I know what is causing the error. The R.jar file that was previously compiled cannot be deleted because android studio is locking the file.
It is in a folder \app\build\intermediates\compile_and_runtime_not_namespaced_r_class_jar\debug
Now to get around the problem I have been closing down android studio. Then deleting the R.jar, then restarting android studio and then compiling.
This process takes a good few minutes and I have to do it every time. Imagine how long it takes to write a program when you have to do this every time.
When this was asked on stack overflow previously suggestions were to Invalid caches / restart, but that is no quicker than what I did above, and only works once.
Also tried Clean Project, but that has no effect.
I have used many compilers over the years like visual studio, codeblocks etc but this kind of thing never happened before, so why is android studio so bad?
Has anyone found a solution to this problem yet?
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Go to Edit Configurations check that you are not building before each launch. Remove "Build"
I also encountered the same problem in Android Studio 4.x in Windows 10. Simply using "Restart and Invalidate" does not work for me. Sometimes, deleting the build folder will work but I cannot build the project more than once. Here is my solution:
Check Java Runtime Version Used by Gradle and System Default
Having multiple daemons may cause problems as described in documentation from Gradle. To solve this problem,
Open your project in Android Studio
Find the JDK location used in your project (File > Project Structure > SDK Location > JDK Location)
Open a command prompt. Let $ANDROID_JDK be the path you found in Step 2. Type $ANDROID_JDK/bin/java.exe --version to find out the Java version.
Type java.exe --version to find out the default Java version used by the system.
Compare if the version information from Step 3 and Step 4 are the same.
Build with app Configuration
Empty Composable Activity template will create two build configurations.
You should change the build configuration to app as shown in the figure below. This solves my problem.
Proper Launching Procedure
As illustrated in Bilal Aslam's solution, we can edit the build configurations (Run > Edit Configurations). After selecting Compose Preview > Default Preview, you will see Build then Gradle-aware Make in the Before launch panel. Remove Build should be able to solve the problem. The side-effects are unclear.
I updated tools in my Eclipse first by going to Help->Check For Updates and installing everything i that it suggested. Then by going to Window->Android SDK Manager and updating multiple things including my SDK version.
After I have finished my update all my Android projects got a nice red box with an x inside it. I explored the projects and noticed that none of them had any errors inside the project just the project itself had the error icon. I searched online and i found that other people had similar problems. So i thought i found the solution. Alas after cleaning and building the project I got additional error icons next to multiple java files in my projects. Eclipse cannot locate the automatically generated R files when it tries to import them and all the imports are selected red.
I tried deleting the whole content of .android directory (starting with specific few files then the whole content) but that did not bring desired results.
So i have deleted the newly generated files and restored all the old ones.
When I clean and build the projects again all the errors disappear but only until I try to run the project again and then same error appears:
Your project contains error(s), please fix it before running it.
I have also found a related question. It claims that there must be a problem with my xml files. I did not modify any of my xml files since updating the tools so I dont know what could cause them to have errors.
Any ideas as to what is going on??
I've found that eclipse is now picking up errors that it didn't pick up before, because they updated lint, you may have to check all your files and see if there is an error because of this, if it doesn't work try removing Android from the build and reattach it, clean the project, build project, make sure the activities are using the right R files and check what lint says, its like a little square with a tick in it I think.
I had exactly the same problem, solved by removing any imports of R in my code and then cleaning the project
Strangest thing just happened. Even though I have done this 2 times before I have again deleted all my files in .android folder exited my Eclipse and opened it back up again. All the errors were gone and most of my projects work correctly. I have spend a lot of time on this problem and i dont know how it got resolved but Im glad its working again.
When I try to run my Android project(which was working fine yesterday) I get the "Your project contains errors, please fix them before running your application" dialog. But my project has no errors. I've had this problem before, and the solution was always to Clean the project, but this time it isn't helping. The red X icon disappears from the project in the workspace, then reappears when I try to run it. Also restarted Eclipse so it rebuilds the project. Help?
Go to your .android folder and delete your debug certificate. In my computer it is in this path
E:\Users\blessan\.android
Inside that there is a file name 'debug.keystore'. Delete that,clean and try to build the project again. Sometimes this error is caused when the certificate expires.
There are a couple of reasons as to why this might happen. Give these problems / solutions a try.
Problem with your Manifest. These don't always show up, so give your Manifest a thorough check.
Suddenly missing / moved libraries or other dependencies. Right click your project, choose Properties and check the tabs under Java Build Path. When you accidentally remove / move a library file, or any other file the app is dependent on, it can cause an error like this without showing up as an actual error. However in the Build Path screen it will show with a little error sign.
Problems with your R.java. I had an issue with this before where there was a corrupt value in the R.java file. "cleaning" the project didn't fix it, but forcing Eclipse to rebuild the file due to me erasing it manually did.
Problem with a cached version of your app. This one is a real pain cause there are no pointers for it, but sometimes for some reason Eclipse decides to mess with a cached version of your app. This can cause anything from apps not working to apps showing images that have long been replaced by other ones or have been deleted entirely.
If the other fixes don't work, try navigating to your project folder and removing the /bin folder. After that, rebuild the project and try to run it.
I hope one of these works out for you.
This problem is occur some time when you replace new debug.keystore file with the old one.
delete deug.keystore may fix the problem
After everything running normally for a few weeks, we're suddenly getting the following message printed in Eclipse's Console every few seconds.
R.java was modified manually! Reverting to generated version!
The project still compiles and runs normally but seems to take a little longer than usual. Cleaning and rebuilding doesn't help the issue. The R file is getting generated correctly and no other errors are showing up throughout the project. The problem is present on both developers' machines.
Does anyone have any idea what's going on? Everything I could find deals with the R file not being generated. Thanks!
Well, that was an odd one. One of our developers accidentally checked in a version of the .project file that included a builder that was incompatible with the Android SDK. Even after finding that and removing the entry we still had to open the project's Properties > Builders and disable/reenable any of the builders in order for it to take effect. Restarting eclipse (or even my machine) wasn't enough.