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
In previous versions of Android Studio before 4.0, you can search across all text based files.
Now, not only is the short cut to launch the search is gone. The "search everywhere" command only search across file names.
Did I miss something in the update.
You can still search across all files for specific text in AS 4+ by using:
ctrl+Shift+7
or from menu:
Edit > Find > Find in path
In case you don't know, the shortcut for 'Search everywhere' is achieved by quick double-press Shift. I have got AS 4.1. It works well, maybe something is missed when you updated, maybe the restart is required after the update. If restarting doesn't help, you can 'invalidate caches / restart'. Sometimes, IDEA/AS goes mad, fails to find references.
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.
My tabbed open documents are stuck on the same three files for over a month now. When I save and close VS2012 the open files I was working on do not come back on restart. I get the same three old files regardless. I am assuming that the tab cache has issues or something and needs to be cleared, but don't know where to go for this. Has anyone else run into this glitch? Any solutions to refresh the tab'able items so this functionality works correctly again?
It has been three weeks with no answers ... so I finally figured this out on my own. I hate answering my own questions, but here it is:
The SUO file is where all the settings, startup project, and cached user options are kept. With large projects there are times where the .suo file becomes corrupted or too large causing sluggish, or odd behavior with these options. Case in point the outlier I ran into with my open classes not being remembered.
Solution:
Simply delete the .suo file. Visual Studio will create a fresh one for you. I did this and it solved the problem.
NOTE: if you do not see a .suo file in your Solution's root directory try showing hidden files.
Every once and a while I have an issue with the new Android Studio. Sometimes while editing, if I make a mistake in one of my files, then try to build it, Android studio will come back with some "Gradle" error. It will then automatically REVERT back to my original code (thus deleting any of my changes). I do not necessarily like this behavior, but I could deal with it.
However... sometimes, in the course of SAVING and editing, it gets into this weird state where Android Studio will REMEMBER the error, and wont let me correct it. I.e. it will keep restoring the OLD version of the file, with the error in it, no matter how many times I try to correct it and re-save it. An example of this is as follows. In the following XML document fragment, I mistakenly added the [android:backcolor="#00000000"] to one of my XML layout files...
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceListItemSmall"
android:gravity="center_vertical"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:textColor="#111"
android:background="?android:attr/activatedBackgroundIndicator"
android:backcolor="#00000000"
android:minHeight="?android:attr/listPreferredItemHeightSmall"/>
After trying to build, Android Studio came back with the following error:
"Error:(1, -1) Gradle:No resource identifier found for attributed 'backcolor' in package 'android'.
Of course, I tried to simply DELETE the offending line that I added to return my code to its original state, before I added the line. I saved it (i.e. save-all/etc...) then tried to rebuild. To my dismay, Android Studio RESTORES the bad version, reinserting the erroneous [android:backcolor="#00000000"] line again back into the file.
I have also tried SAVING (save all) exiting out, going back in, the rebuilding it again, and just about every variation of this. Though the ONLY way that seems that will correct it sometimes is to completely exit out of Android Studio, start it back up again, and try again.
I am guessing that this is really a "feature" and has something to do with source control, and/or Gradle, and that I just don't fully understand it yet. I am also guessing that there is some setting somewhere to adjust and/or correct this - but I am clueless as to what is going on and what to do to fix it.
Is there a way to correct this annoying behavior of Android Studio?
I've had a similar issue when I make a mistake in my strings.xml file, for example when I have an apostrophe without preceding with a '\'. The trouble is that when the build fails, Android Studio automatically opens app\build\intermediates\res\merged\debug\values\values.xml to show me the broken string. If I then try to correct the string in that file, it doesn't do any good because when I try to rebuild, strings.xml is still broken. The crucial thing is to make sure that you're making the correction in strings.xml rather than the values.xml file.
I have the same issue, but i followed following steps and it resolved my issue,
1) Edit your layout file and open the same layout file in notepad, if you can see updated data in notepad then its Studio Synch issue. then re-synch project.
2) If your edited layout file is not reflecting new changes in notepad file then, first re-synch Studio project and followed step 1.
I hope this will resolved your issue as well.
I still have this issue, the only way I have found to fix it is to go to the terminal in android studio and run
rm -R app/build/intermediates/data-binding-layout-out
Android Studio is failing to delete the last build of the layout, when you try to compile again. Once you do it manually everything is back to normal.
While this issue still occasionally happens (as of currently the latest version is 0.5.+), a simple workaround is to manually edit the xml file with a text editor, then save it. Android Studio will then force resync those files.
To save the latest edits, click on the particular file in project window and select synchronize, and rebuild the code. then the latest edits will be saved.
I just had the same error and made me go crazy
I solved it by copying my project file to another directory and then importing it as a new project and the problem disappeared