假设我有MainActivity类，其中TabLayout和ViewPager被初始化为对应的4个页面。MainActivity.classpublicclassMainActivityextendsAppCompatActivity{privateSectionsPagerAdaptermSectionsPagerAdapter;privateViewPagermViewPager;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContent

我总是看到以下代码的划线setOnTabSelectedListenerviewPager.setAdapter(adapter);viewPager.addOnPageChangeListener(newTabLayout.TabLayoutOnPageChangeListener(tabLayout));tabLayout.setOnTabSelectedListener(newTabLayout.OnTabSelectedListener(){@OverridepublicvoidonTabSelected(TabLayout.Tabtab){viewPager.setCurre