Cocos2d-x Analysis on game adaptation on mobile phones with different resolutions

After my research during this period, I found that the size of the mobile phone screen does not matter whether the game can be fully displayed, because the resolution is different. For example, cocos2d-x for our developers to provide the resolution is 480*320, we can easily make the game full screen display, but the problem is the big point of the phone resolution?

Here is the resolution of some mobile phones I found online:

We can see that 480*320 resolution mobile phones are not mainstream, and this is a problem. When we install a game with a resolution of 480*320 on a mobile phone with a resolution greater than 480*320, the game will become small and most black areas will appear. This is too boring.

How can this problem be solved?

My idea is how to do it easily. I have read it online and it is very troublesome. I can develop game engines. I found the intermediate resolution of the mobile phone, which can be set to 1024*768 based on this to adapt to most mobile phones. Use setscale () to scale the overall scale using the genie and map.

The results are very good. I tried several mobile phones with different resolutions: Xiaomi 2, Lenovo AR728, and IPAD2,