问题
Now on Android Studio 2.2 on new Preview mode, there are no more refresh button:
- Image 1: Preview on Android Studio 2.2 (without refresh button)
- Image 2: Preview on Android Studio 2.1 (with refresh button)
Does anyone know how to display it again? Or with shortcut maybe?
Edit: If I change a drawable by example and that the change does not appear in the layout, the only method that works for me is closed and restart the project. If I close the layout and as I re-opens nothing happens. Same result using the "Synchronized" button.
回答1:
Refresh feature is not removed, it is there; it's pretty simple to refresh:
Click on the preview screen to make sure preview window has the focus and press R. it should display the progress in the right-top corner while refreshing.
If it doesn't work for any reason, switch to design tab and press R, it refreshes the layout instantly.
回答2:
I think it is a small bug. But I find a hack solution to resolve the problem, you can modify the a resource id to a wrong name, for example, you have a resource named 'ic_launcher', when you input 'ic_launcher1', you can find the interface like that:
next step, click refresh icon(sometimes it is 'clear cache' label). it is works for me.
I have try to change the orientation, but it not works when I replace a exist image file.
May your problem is same as : http://stackoverflow.com/questions/39646639/android-studio-2-2-layout-editor-refresh-button
回答3:
Display again?
I guess you cant. Apparently the refresh functionality has been removed because they think the processing will happen much faster and will auto-refresh the previews real time. The Layout Editor's document has no mention of refresh functionality.
Shortcut?
If you are faster in making changes to your layout than Android-studio refreshes, you could try toggling between the design and blueprint views using the shortcut B
Refer the Layout Editor Official Documentation for other shortcuts you might feel comfortable with or works for you.
回答4:
There is no refresh button in stable version of android studio 2.2 for preview. But there is a work around to do so. By toggling the orientation button in an editor will refreshes the changes!
回答5:
So do the Simple Step. When you change your layout then save it and clean your project.
go to menu Build -> Clean Project.
I Hope this will help you.
回答6:
I too had the same Problem , sometimes changing the Android Version worked and it'll sure work if you clean/Rebuild the project
回答7:
Find the double diagonal lines below your preview layout and click them. It will refresh your layout.
来源：https://stackoverflow.com/questions/39786229/how-to-refresh-preview-on-android-studio-2-2