Develop Reference

Blank lines in Android Studio Electric Eel

I recently updated Android Studio to the Electric Eel version and I noticed that the editor shows black lines even where there shouldn't be any. Seems like a waste of workspace space to me but I couldn't find anything in the settings.
Android Studio:
Notepad:
Does any of you have the same problem ?

Settings > Editor > Inlay Hints: i have disabled Inheritors, Usages and Code author.
Thanks to Zain.

You can :
Change your theme and restart with clear cache android studio.

How to return old Logs Style in Android Studio Dolphin

I've just updated android studio to Android Studio Kotlin, but it appears that the logs have changed to a "newer" style. But I don't like that style and I want to return the old style, any idea how to do that?

Android Studio - rendering design not working properly after update

I don't know what happened to Android Studio, but after update Design preview of the project is not working property. Look what happend:
I have noticed that after update, SDK has been changed so I installed back SDK used in project but the result is the same. Also I have tried to reinstall android studio but with no result too.

If you are worried about where the code pane is, that is now at the top right corner. You have the option to switch between code, design or both now.
If you are worried that the project is not refreshing to the artifacts such as colors as shown in the error above, then check what BaseTheme your project is implementing and try to clean and rebuild your project. Material Theme can cause such issues as it follows a different naming convention than AppCompat.

Android Studio 3.2 layout "preview" not emulating material design components properly

I've been updating my project to target sdk-api28 and I started setting up the latest MaterialComponents, but I'm now having issues with the layout Previewer within Android Studio.
The Preview just won't display the correct design for the material components, eg. adding style="#style/Widget.MaterialComponents.TextInputLayout.OutlinedBox" on a TextInputLayout view won't change the design (no outlines) in the emulated preview, but it does look okay when running on a phone (got outlines).
Here's how it should and does look when running on phones:
But here's a screenshot of how it looks in the Android studio's Preview.
I'm having this issue on any project, and even on the Shrine tutorial app with the same setup from MDC Codelabs (MDC-103(Java) - Shrine).
This happens only on the preview. Any of these projects, when running on a phone or on the emulator within Studio, look okay.
As much as I could 'think through' this, the issue is I believe somehow connected to my Android Studio, emulator, or maybe build tools versions? Please, could someone point out if I'm missing something very simple?
My Android Studio (sdk, tools etc) versions that I have installed:
Android Studio 3.2.1
Android Emulator 28.0.16
Android Platform Version: API 28: Android 9 (Pie) revision 6
Android SDK Platform-Tools 28.0.1
Android SDK Tools 26.1.1

This issue happaned to me in android studio 3.2.
after one day everything gose fine.
what i do was invalidate and restart. reset android studio default settings
the clean. and exit android studio and open it again. and it works fine
this is a bug not related to you only.

While some users who experienced similar issues, could solve this with cleaning out Android Studio cache and config, this didn't work for me.
After looking into various possible fixes and tips, I solved this by updating to Android Studio 3.4 Canary which is the latest non-guaranteed-stable version of Android Studio, which you can get by either downloading a Preview release (here: developer.android.com) or changing your update preference (within Android Studio) ie. Update channel to Dev channel or Canary channel within Android Studio Settings > Appearance & Behaviour > System settings > Updates
I do think that this might not be a proper fix, but it's the only thing that worked out for me and solved the layout (design) preview not being able to display correct design.
If someone else runs into a similar issue, make sure to first try out clearing cache, using the Invalidate and restart under File menu or any other method. The Invalidate and restart feature clears out cache and restarts android studio, after which it will have to sync again and check for all dependencies, Sdk, tools etc.
Also to avoid this issue, before trying out anything else make sure you have proper and latest SDK Build-tools, Emulator, SDK Platform-tools, SDK Tools versions installed.
I'll leave this here as an answer for now, and update it if any new solutions come around.

Sorry, I'm here 3 years late... But this was my solution for this render problem... It has Material.Light theme by default. If you change it to Light.Bridge the problem is solved!
Hope it helps some one

Android Studio Theme editor not showing previews

In Android Studio 1.5.1 my Theme Editor does not show previews for any theme I select.
I've tried making a new project and see whats happening there, but it's still not showin any preview.
I feel like I'm missing something silly.

I noticed all the previews broke when I installed the Android N SDK. Switching the preview to API 23 fixes it for Layout previews, but not for the Theme Editor. Only way I got it to work for Theme Editor was by uninstalling the Android N SDK.

This was happening to me on Android Studio 2.3.1 Doing a 'Clean Project' from the Build menu fixed the issue.

I was facing same issue. I have uninstalled Android studio and reinstalled the latest version. The problem got resolved.

I was facing same issue. Try this:
go to File> Sync Project with Gradle Files
File > Invalidate caches/ Restart..
This worked for me.