Develop Reference

ConstraintLayout doesn't match with the screen size

I just started my first Android Studio project and I already come with a problem :)
I search on google for the answer but didn't find my problem.
So I need your help please ^^
I download the last version of Android Studio, create a project with an Empty Activity and I came up with this
As you can see my ConstraintLayout is really small and I just can't work with this.
I didn't touch anything on the project. Just to be sure I create 3 projects that have the same issue and redownload 4 time Android Studio.
On the virtual Devices, it looks correct throw: Screenshot
I put the XML code just in case it can help
xmlcode
Hope I was clear and sorry for my English ;)
EDIT: For some reason, the constraint layout fit correctly on the watch screen, but I don't want to create a watch app x) screenshot_watchview

Ok so I have finally find the problem ! I'm so happy right now :D
The problem was the AppTheme theme that I use, I switch it with the DeviceDefault theme. I don't know why this theme was causing problem but now it work and I can finally work on my first Android App !

If you are using the supportLibrary 28+ then this thing happened to me too.
and when I change the support lib version to the 27, it works.
Maybe this is a possible bug in the support library 28+.
Changing the AppTheme works like a charm if you want to stick with the support library 28+ But if you still don't want to so Try using the support library below 28.

Chrome remote dev tools are disordered, like the screenshot below, even though I remove all the settings

When I used chrome to debug my Android App WebViews, the remote device tool show like the screenshots. It was disordered, and on the bottom of the window is always blank, like something on it. When I changed the window size, all cell size changed(but changed strange, not predictable), and I still cannot see all cells(Some were hide, some were block by the white, and some were block by other cells which were not what I want). Until now every time I open the remote dev tools, it just like this.
Chrome dev tools to debug common PC webs worked fine, anyone got any ideas?

I was having the same problem. Not a lot of help out there easily find-able. Figured i'd answer here in case some one else comes across this issue and this question:
According to this link the problem is a specific feature used in older webview versions, and the later versions of chrome dev tools not being compatible. Use an older version of chromium as a work around.
Here's how to identify where to download chromium. I used 62.0.3202 and it fixed this issue for me.

The answer from Ben Culmer is correct, but I have detailed description how to deal with it.
Yes, the problem is an old Android and the new Chrome. They are incompatible.
Here is step by step description how to find and set up old Chromium version to deal with it.

How to switch to design editing in android studio for designing layout of the activity

I can't switch to design editing in android studios when i want to edit the xml file of the layout file. There are no button for changing to text or design on the bottom of the codes. Screenshot of android studios
Can someone help me fix the problem?

I had the same issue. Where the 'design/text' tabs were missing.
I had switched to the dark theme and thought maybe that was the issue, so went back to Preferences / Appearance (under IDE Settings) switched back to Default Theme, and that reset everything correctly for me.
I could also then switch again to Dracula theme and the tabs were still there, so seems like switching themes is a way to reset the IDE windows/tabs.

Try to restart the IDE .It may be helpful to show the design /Text tab..

Follow these steps:
View -> Tool Windows -> Preview
Same question was answered here: Where is Android Studio layout preview?
If it didn't help, try methods mentioned here: Android Studio "design tab" missing

From your screenshot, change the code tree from Package to Android as bellow link may help.
See screenshot here...
Hope this will solve your problem :)

As of today in July 2022, here are the actions I have taken:
Look for the device manager icon
Choose your option to add a device (virtual or physical)
In case of a virtual device select the screen size and download it. In the case of a physical device, you have to pair it whether by wifi or QR code scan.

Why is button showing on AVD but not the Designer?

I am very new to android apps, I do mostly VS2013, and I was just trying to do a hello world or anything basic. Why is there a tiny "hello world" on my design for my .xml file, but the button I added shows on the AVD? I'm really confused.
EDIT: To clarify, this is a brand new project. My question specifically is how can I make sure I can see on the design/text tabs what is going to be on my emulator? All I have done is drag/drop from the Palette onto the screen,and see nothing. What should I be doing instead?
The design device is the same as my AVD.

All: The solution was an issue with the rending, and is apparently a bug with the newest version of the Studio. This link I found had the information and solutions to help me with it:
Rendering problems in Android Studio v 1.1 / 1.2

Android: Graphical Layout not working - doesn't show anything

My situation is: I once made an android project(2.2 version) but soon needed to format my computer. After formatting, I downloaded eclipse again but when I imported my project, I wasn't able to use the 'graphical layout' menu for xml. It doesn't show me anything like the picture below.
http://img525.imageshack.us/img525/3586/19978552.png
I cleaned the project and updated the Android SDK, however, none of these seemed to work well. What could be causing this?

Try restarting Eclipse. Usually that solves the problem for me when that happens.

Right click on your layout xml file and select Open With -> Android Layout Editor. It will force eclipse to open file in android's layout editor mode

None of above worked for me. what worked for me is:
1- Select a Google APIs Project Build Target rather than one of the Android X.X ones. This setting is in right click on project -> Properties->Android.
2- Make a change in XML and save it. Now switch back to "Graphical Layout" and it will show the layout.
For some, only 2nd step works.

This Question was asked 3 year ago, I am sure that you have get your solution, however i was also facing the same problem but got the solution in eclipse, here it is:-
1)Goto help->AboutEclipse->Installation details.
2)check the version of Android DDMS, Android development tool, Android hierarchy viewer, Android native development tool, Android trace view and tracer for openGl ES in installed software tab.
3)If they have different version than you have to update all of them.
4)Goto help->check for update in eclipse and follow the instruction.
5)Then restart eclipse.
This solve my problem.

The topic seems a little bit cold, but I wanted to add it nonetheless.
I had a similar problem with my layouts recently. When i create a project it automatically creates the layouts in the latest version of Android (eclipse shows it as version 22 of android as of today). But i can't see anything. So i just change the version to, say 18, and it shows ok. Furthermore if i want to change it back to version 22 it throws and exception, saying that a class can't be instantiated. (I am probably missing a class or a library on my system.)
Therefore if you cant see the layout it might be a good idea to switch back to earlier versions for development. cheers.