How to refresh preview on Android Studio 2.2?

Question

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.

Answer 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.

Answer 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