Introduction to Android support library View Pages framework

Introduction to Android support library ViewPager framework Overview: The ViewPager in the Android support library is a powerful view container that can be used to switch the horizontally sliding page switching function in Android applications.ViewPager allows users to seamlessly slide between different frameNT or views, similar to horizontal rolling tab pages. The main features of ViewPager include: 1. Support horizontal sliding: ViewPager can slide horizontally between different pages, and users can easily switch the page. 2. Support Fragment: ViewPager can be used with Fragment, enabling developers to switch pages between different Fragment. 3. Support custom adapter: ViewPager uses adapters to dynamically load and manage pages. Developers can create custom adapters according to their needs. 4. Support page pre -load: ViewPager can be pre -loaded to the adjacent page to improve the smoothness of users when switching the page. 5. Support page animation: ViewPager provides some built -in page switching animation effects, and can also achieve specific transition effects through custom animation. Steps for usage: 1. Add dependencies to the project's Build.gradle file: Implementation 'com.android.support:appcompat- v7:x.x.x' // x.x.x. 2. Add ViewPager to the layout file: <android.support.v4.view.ViewPager android:id="@+id/viewPager" android:layout_width="match_parent" android:layout_height="match_parent"> </android.support.v4.view.ViewPager> 3. Create an adapter class: public class MyPagerAdapter extends FragmentPagerAdapter { private List<Fragment> fragmentList; public MyPagerAdapter(FragmentManager fragmentManager, List<Fragment> fragmentList) { super(fragmentManager); this.fragmentList = fragmentList; } @Override public Fragment getItem(int position) { return fragmentList.get(position); } @Override public int getCount() { return fragmentList.size(); } } 4. Set a adapter in Activity or Fragment: ViewPager viewPager = findViewById(R.id.viewPager); List <fragment> fragmentList = New ArrayList < /); // Add the fragment that needs to be displayed MyPagerAdapter adapter = new MyPagerAdapter(getSupportFragmentManager(), fragmentList); viewPager.setAdapter(adapter); Additional features: 1. Add page indicator: TabLayout tabLayout = findViewById(R.id.tabLayout); tabLayout.setupWithViewPager(viewPager); 2. Swelling page switching event: viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { // The callback of the page during sliding } @Override public void onPageSelected(int position) { // Page switch to complete recovery } @Override public void onPageScrollStateChanged(int state) { // Page Rolling Status changes to call back } }); Summarize: The ViewPager framework in the Android support library is a powerful view container, which provides a convenient page switching function.By using ViewPager, you can easily achieve horizontal sliding page scrolling effects to enhance the user experience.According to your needs, you can customize the adapter, page indicator, and page switching animation to make ViewPager more flexible and personalized. The above is a brief introduction about the Android support library ViewPager framework. I hope it will be helpful to you!