Android.support.v4.view.pageradpter and viewpager cannot match

Directly on the picture, this is evidence hahaha, I also specially downloaded the android.support.v4.jar package. In fact, the androidx.viewpager.widget.PagerAdapter was automatically imported from the beginning, but it was found that the instantiateItem and destroyitem methods were not automatically rewritten. I rewritten the isViewFromObject and getCount methods, so I thought it was a wrong package. Later, the v4 package did not automatically rewrite those two methods. Looking at the source code, it turns out that PagerAdapter does have instantiateItem and destroyitem methods, but I just have to rewrite it myself , Although AS did not automatically help us rewrite, but we must rewrite. So,, come back to androidx!