so today I stared at the code when suddenly XML editor (autocomplete) stop working properly. The problem is that when I type the first letter of some element it gives me a proper suggestion but when I start typing other letters it just stuck with the first one and when I confirm the suggestion it gives me 2 words, the first one is the world I type first and the second is the correct one.

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1Invalidate cache and restart – sam Apr 16 '18 at 18:35
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This might help. https://stackoverflow.com/questions/18370599/android-studio-auto-complete-and-other-features-not-working – S.Haviv Apr 23 '18 at 12:57
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Do [this method](https://stackoverflow.com/a/54070040/7418129) to solve that issue. Happy coding. – user7418129 Nov 23 '21 at 10:06
3 Answers
It is very simple. Delete .caches file:
For Android Studio 4+
- Just close your AS.
- Go to AndroidStudio2020.3 folder.
- Delete the Caches file (path is: C:\Users\user\AppData\Local\Google\AndroidStudio2020.3\caches)
- Restart your AS.
- Enjoy.
For Android Studio 3+
if you are using Android Studio 3+ then delete cache from the following path
C:\Users\user\AndroidStudio3.x\system\caches

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1thanks a lot I didn't know the path (C:\Users\user\AppData\Local\Google\AndroidStudio2020.3\caches) you saved my day – mozhi jafr Dec 09 '21 at 13:03
I have tried different things(deleting .idea folder and .iml files from the project, invalidate cache and restart the Android Studio) nothing worked.
Finally, I close the Android Studio and navigate to android studio installation directory(i.e C:\Users\Your Username.AndroidStudio3.3\system) delete the Cache folder, run the android studio and it works for me.

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I have also faced the same issue, because of my Android Studio version
Android Studio Chipmunk | 2021.2.1 Patch 1 Build #AI-212.5712.43.2112.8609683, built on May 18, 2022
Try to update compile SDK to 31, hope it will get fixed.
android {
compileSdk 31
...
}
Also check the ViewModel and appcompat version also, they should be matching the SDK version.
implementation 'androidx.appcompat:appcompat:1.4.1'
implementation 'com.google.android.material:material:1.6.0'
implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.5.1'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1'

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