I know this has been asked many times, but usually the advice is something along the lines of "decrease Android gradle plugins version" or something like that. Firstly, that doesn't seem to work for me, secondly, decreasing the version in order to solve this kind of problem doesn't seem like a good practice and I'd like to avoid it (especially since Android Studio warns me I should increase the version back again when I try to decrease it).
So now what exactly is happening + some details that might help:
Every class is underlined with red color in the project explorer and there are loads of "java package R does not exist" messages in the Problems view
When I open any class, suddenly its red underline disappears and there are actually no errors in this class
It happens if and only if AS does an automatic build (I can see "21:03 Auto build completed with errors" in the Event log). When I build manually, there are no errors in the Problems view, and no class is underlined (that is, until AS does auto build again, which happens all the time)
In any way, this doesn't prevent building of the application/APK/AAB, installing it on the phone/virtual, and running it
This has been happening ever since I updated Android Studio to v4.1 (I now use Android gradle plugin v4.1.0)
(Of course, I also tried all the obvious stuff - deleting every temporary/generated file, invalidating cache, restarting, cleaning, etc. etc. Everything I could think of.)
I had a problem like this before, it had nothing to do with the gradle ijust add "import com.package.appname.R;" into myclass and is worked
I'm using Android Studio 1.5.1 on Kubuntu 15.10 and lately, Android Studio freezes completely whenever I right click into the project explorer. The only thing I can do then is to kill the process.
More oddly, whenever I hover the Help menu with the mouse, the complete OS freezes completely and I have to restart the computer. I am not 100% sure if these two issues are related, but they started at the same time.
Sometimes (about 10% of the time) it works well. I have no idea what influences this pattern, though. This used to happen earlier as well, but much less frequent.
The usage of different color schemes or deactivating plugins seem to have no influence on this behavior. I also did not install any fishy third party software or anything else that could (to my knowledge) have influenced this. Any ideas?
The issue seems to be resolved in the latest stable release (2.0).
I've recently run into this as well. Pointing jstack at the hung process suggests that it's this problem.
Switching to the Darcula or GTK+ theme resolved it for me. Weirdly, I can switch back to the Intellij theme afterwards and the problem stays fixed - I just have to switch to GTK+ or Darcula at some point after startup but before triggering a right-click menu.
Edit, 1 day later: In a deeply unimpressive plot twist, this solution no longer works for me. I've changed nothing since yesterday, but now attempting to switch themes triggers the lockup ಠ_ಠ
Edit, 1 day, 5 minutes later: After a restart the situation improved slightly - changing the theme now works again, and avoids the freeze-on-rightclick failure. I'm finding it difficult to take this as much of a victory.
Edit: As karpfen notes below, this issue has been resolved in the latest release. Huzzah!
The current Android Studio version has inbuilt auto save. Which means if you close a file, it will automatically save the changes.
This is inconvenient, it means when experimenting with code, all changes need to be noted as there's no option to have a dialog requesting to save changes on closing a tab or the project, as in many other ides.
According to documentation IntelliJ IDEA 15.0 Help/Saving and Reverting Changes:
When does IntelliJ IDEA auto save changed files?
Autosave is initiated by:
Compiling a project, a module or a class
Starting a run/debug configuration
Performing a version control operation such as pull, commit, push, etc.
Closing a file in the editor
Closing a project
Quitting the IDE
.../...
Note that those are optional autosave triggers, and you cannot turn off autosave completely.
These are the auto save settings that can be changed in Android Studio:
TLDR
Is there any work around to circumvent this autosave?
These questions are related, but do not acknowledge that this intended behaviour of the ide and are rather asking for fixes within the ide.
Related:
How to disable Auto Save save in Android Studio
How turn off autosave in Android Studio?
If you want to experiment, use the revert button at the top right. This works especially well if you are using a VCS (like git...) as it will revert to the last committed version. And since commits are still manual, this will soon replace your traditional save.
If you are not using a VCS the point in time to which it reverts is a little more arbitrary, but in my experience it takes a pretty good guess. If that doesn't suffice, you can use the history button next to the revert button, which keeps track of every version IntelliJ saved, and you can then go back to any point in time you like. :)
Android Studio as a software is very much based on the JetBrains software solutions such as IntelliJ (used for Java) and PHPStorm (used for PHP, as its name shows).
As a concept in itself, JetBrains have implemented this feature and as a company believe that it's much more efficient and productive than manual save. Hence, there is no way to disable this behavior or enable any confirmations in Android Studio either.
Taken from JetBrains FAQ for IntelliJ:
Because IntelliJ IDEA has the ability to change so many files simultaneously in large refactoring actions, and change them without ever opening them, single file saves don't make very much sense. In recognition of this, IntelliJ IDEA reserves the right to save any of your files literally whenever it wishes. It's actually quite nice to never have to worry about your file's save statuses, once you get used to it.
Having said that, and encountering this issue myself too as a developer, I agree that it would be a good idea if the Manual Save feature were enabled by the Android Engineers (or JetBrains themselves). After all it is up to the developer to choose whether he needs this feature or not.
To Jetbrain's defence, they have a very good Undo function through their Ctrl + Z shortcut keys, letting the developer go back many steps and find where a certain error has occured.
All IntelliJ based products nowadays save any opened or modified files whenever they wish - read this as "immediately".
I would suggest you give up on trying to disable it (trust me, it's not possible to hack it) and either change your work flow or work on copies of the files.
As background I should mention that I am a plugins author for IntelliJ (with 3 publicly released plugins in the JetBrains repository) and thus have a reasonable understanding of the internal IntelliJ architecture.
I installed android studio.. it was working fine. Now all the sudden, none of the auto complete features are working.. I can type anything anywhere no variable checking, no help with functions or checking anything. I can still compile the project and I get errors when that happens.
Can anyone please help me out with this issue.
#1 From Build menu (of your Android Studio), click Rebuild Project option.
#2 Then once rebuild completes, go to File > Invalidate Caches / Restart... and Click on Invalidate an Restart button.
This really works for me.
Source: https://code.google.com/p/android/issues/detail?id=61844#c4
#1 Rebuild is required, because Android-Studio does simply rely solely on Gradle's build-result (without static-analysis support, at least at time of writing, 2022).
#2 Clearing cache is required, because the previous build-result (before above rebuild) may be indexed, which makes Android Studio ignore latest Gradle build-result
(this is a very good speed optimization, but a very bad Developer-experience as well).
There can sometimes be other reasons too, which is why there are many other answers posted here.
You can also check if Power Save Mode on File menu is disabled.
Close Android Studio
Go to C:\Users\UserName\.android and rename the folder:
build-cache to build-cache_old
Go to C:\Users\UserName\.AndroidStudio3.x\system
OR (for Android studio 4 and Higher) go to C:\Users\UserName\AppData\Local\Google\AndroidStudio4.x
and rename these folders:
caches to caches_old
compiler to compiler_old
compile-server to compile-server_old
conversion to conversion_old
external_build_system to external_build_system_old
frameworks to frameworks_old
gradle to gradle_old
resource_folder_cache to resource_folder_cache_old
Open Android Studio and open your project again.
Originally use:
compileSdkVersion 32
targetSdkVersion 32
And an update to 33 appeared, I updated it and the suggestions in the XML no longer appeared, I went back to 32 and now the suggestions appeared.
Close Android Studio
Go to c_users_path_on_windows/.AndroidStudio3.5/system/
Delete the cache folder
Start Android Studio
This works for me.
Most of the times i have seen that the problem is that Power Save Mode is enabled, to disable go to Current inspection profile (lower right corner in Android Studio).
I have not run into this problem personally, but try checking the following settings (File -> Settings or Alt+F7):
Project Settings [name]
Inspections - ensure that Android and Android Lint is checked, or alternately just set it back to default using the dropdown box at the top.
IDE Settings
Editor -> Code Completion - ensure the Autopopup code completion is checked (and check the rest of the settings based on your preference.
Uncheck "Power Save Mode" in "File" tab
If nothing works (like happened with me ) go to your user profile in windows at %userprofile% . You will find folders there (hidden) named with the version of the android studio you are using and prefixed with a dot.
like .AndroidStudio3.1. Just delete that .
Solution: Try disabling "File -> Power Save Mode" in Android Studio (Beta) 0.8.14 - Mac OS X
On windows, the option can be at some other place.
I had the same problem then I recalled that while exploring the new android studio, I switched on the "File -> Power Save Mode" to see what it does?
I disabled the power save mode and all those intelligent features were back.
It turned out that in Power Save Mode, Android Studio switches off the modules responsible for features like Smart Code Completion and Code Analysis.
I had a similar problem where none of the other solutions worked.
Closing Android Studio and then deleting the .idea and build folders resolved the issue.
Disable Power Save Mode and Invalidate Cache and Restart.
For Artic Fox 2020|3.1 Version: Auto Complete Suggestion Problem.
Please Follow the Following Steps:
Close Android Studio
Locate caches folder in C:\Users{username}\AppData\Local\Google\AndroidStudio2020.3
and Delete it.
Open Android Studio Again.
Check your Android studio version and Target that version folder at below location
C:\Users{username}\AppData\Local\Google
Note : AppData folder is Hidden in Windows
This Solution also works if android studio mess up with xml files and java code. Don't! modify your code otherwise IDE won't able to change it to default. If you see such messy code just follow above steps and your code will be fine again.
It's Working
Disable Power Save Mode
Untick Power Save Mode Option ::
File -> Power Save Mode
There is a power saver mode in android studio if accidentally you click on that it will disable code analysis which will reduce the battery consumption and performance will also increase but it will not detect any errors and do auto complete operations.
To disable power saver mode
- Go to File Menu of Studio
- Uncheck The Power Saver Mode
In your IDE code analysis will be shown using an eye symbol at the right corner of your android studio.
If Green means it is enabled and there is no error in your code.
If Red Means It is enabled but there are few errors in your code.
If It is white or blur then code analysis is disabled
Just remove all the folders named AndroidStudioPreview
On Windows:
Go to your User Folder - on Windows 7/8 this would be:
[SYSDRIVE]:\Users[your username] (ex. C:\Users\JohnDoe)
In this folder there should be a folder called .AndroidStudioPreview
On Mac OS X
Remove these files:
~/Library/Application Support/AndroidStudioPreview
~/Library/Caches/AndroidStudioPreview
~/Library/Logs/AndroidStudioPreview
~/Library/Preferences/AndroidStudioPreview
There can be several things which cause this.
Make sure you've write the correct version in targetSdkVersion and compileSdkVersion.
Make sure targetSdkVersion and compileSdkVersion are same.
Other solutions can be:
Invalidate caches & restart Android Studio from File → Invalidate Caches / Restarts...
Clean your project from Build → Clean Project
Rebuild project from Build → Rebuild Project
Make project from Build → Make Project [this process may take some time]
Be sure to check for IDE errors by clicking the button at the bottom right of android studio.
In my case, there was a bad plugin, and the IDE Fatal Errors window prompted me to uninstall the plugin. (I wish I'd known about this feature before spending half a day invalidating caches, deleting folders, and reinstalling android studio with no luck.)
It worked for me.
From menu select:
File -> Power Save Mode
and make sure it's disabled
Go TO Left Side Top File Option
Then Click To Power Save Mode
Disable Power Save Mode That Fix This Issue
In my case, when I switch keyboard language to English, the auto complete works again.
if the autocomplete isn't working for you in Android Studio, just press File and uncheck the Power save mode, it should work fine after that.
if power save mode is already unchecked then first check then uncheck them.
If you have a library project included, make sure the library has the dependencies in build.gradle listed using the api configuration, not the implementation configuration.
Also make sure that the project that includes the library has all the dependencies listed (using the implementation configuration is fine here).
'The file size (2561270 bytes) exceeds configured limit (2560000 bytes). Code insight features are not available.'
Had this issue for days with none of these proposed solutions working before eventually getting this message in yellow under the tabs after adding a line of code. Removing the line of code eliminated the message but not the issue. There appears to be a code size window where you lose insight features but don't get this message, at least for me. Once you go over a certain point the message finally pops up. The suggested solution in a different thread for this issue was to edit 'Help/Edit Custom Properties' to increase the configured limit, but just opening this brought up a dialogue asking if I wanted to create an 'idea.properties' folder so I decided not to risk that approach over eventually cutting the file size.
If sometimes this problem can occur if you misspelled a file extension or make a file without adding an extension.
Check you have added the file extension correctly.
I think that answer may help you.
I'm using mac and suddenly the code completion (^space) not working. There are no errors. Turned out the android studio's shortcut was conflicted with system's shortcut. I don't know why it suddenly happen because it was fine before, maybe there was an update on my Mac.
See below setting for the conflicting shortcut
In my case, C:\Users\UserName\AppData\Local\Google\AndroidStudio2020.3\ just delete caches folder and restart android studio. after deleting this caches folder my problem was solved :)
I encounter with this problem while adding a kotlin library into my project on mac. Changing macbook language to english solved this problem. I also had some weird problems with auto-generated databinding codes, those are also solved.
Try Invalidate caches/Restart from File in Menu Bar from android studio.
Close Android Studio
Go to
C:\Users\YOUR_USERNAME\.android
and rename the following folder to:
build-cache to build-cache_old
then Go to (Android studio lower then version 4)
C:\Users\UserName.AndroidStudio3.x\system
OR (Android studio 4 and Higher) Go to
C:\Users\UserName\AppData\Local\Google\AndroidStudio4.x
or
C:\Users\UserName\AppData\Local\Google\AndroidStudio2021.2
depending on your version and rename these folders:
caches to caches_old
compiler to compiler_old
compile-server to compile-server_old
conversion to conversion_old
external_build_system to external_build_system_old
frameworks to frameworks_old
gradle to gradle_old (if exists)
resource_folder_cache to resource_folder_cache_old (if exists)
Open Android Studio again and the autosuggsion will be fixed.
and You can also check if Power Save Mode is disabled or not from the File menu.