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首先先在布局文件创建ViewPager

大致的布局！！

接下来创建三个Fragment

Fragment 里面还得删些东西

删的，就就剩以下

@Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {
           // Inflate the layout for this fragment        View inflate = inflater.inflate(R.layout.fragment_blank_fragment3, container, false);        return inflate;    }

接下来就是创建一个适配器

适配器要 extends FragmentPagerAdapter

import androidx.fragment.app.Fragment;import androidx.fragment.app.FragmentManager;import androidx.fragment.app.FragmentPagerAdapter;import java.util.ArrayList;public class FragmentAdapter2 extends FragmentPagerAdapter {
       private ArrayList
   
     list;    public FragmentAdapter2(FragmentManager fm, ArrayList
    
      list) {
           super(fm);        this.list = list;    }    //每一个Fragment    @Override    public Fragment getItem(int position) {
           return list.get(position);    }    //总数    @Override    public int getCount() {
           return list.size();    }}
    
   

接下来就是主线程啦

private ViewPager vp;    private RadioGroup rg;    private RadioButton index;    private RadioButton find;    private RadioButton my;    @Override    protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        ArrayList
   
     list = new ArrayList<>();        list.add(new BlankFragment1());        list.add(new BlankFragment2());        list.add(new BlankFragment3());        FragmentAdapter2 fragmentAdapter = new FragmentAdapter2(getSupportFragmentManager(), list);        //设置适配器        vp.setAdapter(fragmentAdapter);				//RadioGroup的监听事件        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
               @Override            public void onCheckedChanged(RadioGroup group, int i) {
                   switch (i){
                       case R.id.index:                    //按下标来实现所以首个是0                        vp.setCurrentItem(0);                        break;                    case R.id.find:                        vp.setCurrentItem(1);                        break;                    case R.id.my:                        vp.setCurrentItem(2);                        break;                }            }        });    }    private void initView() {
           vp = (ViewPager) findViewById(R.id.main);        rg = (RadioGroup) findViewById(R.id.rg);        index = (RadioButton) findViewById(R.id.index);        find = (RadioButton) findViewById(R.id.find);        my = (RadioButton) findViewById(R.id.my);    }
   

首页里面是我做的功能 可以忽略不看

下面是我的效果

点击下面的视频和我的 就可以跳转Fragment，左右滑动也可以

转载地址：http://odavi.baihongyu.com/