Any way to fix the resolution of android application ?

I know there are tons of way to set aspect ratio. But I face a problem where the resolution of some devices is very high, like 2048x1536. Even the aspect ratio is correct, the application feels lag due to high resolution (It's ok on some device with resolution like 1024x768).

Since I cant set the resoultion throught player setting. Is there any way to solve this problem? Thanks.