ViewPager初识（二）_myadapter myadapter = new myadapter(getsupportfrag-优快云博客

本文介绍了一个使用FragmentPagerAdapter实现ViewPager页面切换的例子。通过创建自定义适配器MyAdapter，并覆盖getItem和getCount方法来实现不同Fragment之间的切换。

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上一篇我们的MyAdapter集成的PagerAdapter
这一篇我们集成FragmentPagerAdapter
这里写图片描述

public class MainActivity extends AppCompatActivity {
    private ViewPager mViewPager;
    List<Fragment> list=new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mViewPager=(ViewPager)findViewById(R.id.vp);
        list.add(new Fragment1());
        list.add(new Fragment2());
        list.add(new Fragment3());
        MyAdapter myAdapter=new MyAdapter(getSupportFragmentManager());
        mViewPager.setAdapter(myAdapter);
    }
    private  class MyAdapter extends FragmentPagerAdapter{
        public MyAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return list.get(position);
        }

        @Override
        public int getCount() {
            return list.size();
        }
    }
}

MyAdapter myAdapter=new MyAdapter(getSupportFragmentManager());
        mViewPager.setAdapter(myAdapter);

MyAdapter继承FragmentPagerAdapter
只从写

   @Override
        public Fragment getItem(int position) {
            return list.get(position);
        }

        @Override
        public int getCount() {
            return list.size();
        }

 private  class MyAdapter extends FragmentPagerAdapter{
        public MyAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return list.get(position);
        }

        @Override
        public int getCount() {
            return list.size();
        }
    }