安卓编程，我把侧滑和底部radiobutton结合，可是点击radiobutton没反应

Question

点击radiobutton之后 fragment不加载 有人知道为什么吗

Answer 1

 public class MainActivity extends FragmentActivity {

    private MyLazyViewpager pager;
    private RadioButton home_page;
    private RadioButton find;
    private RadioButton my;
    private RadioGroup group;
    List<Fragment> fragments = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initData();
    }

    private void initView() {
        pager = (MyLazyViewpager) findViewById(R.id.pager);
        home_page = (RadioButton) findViewById(R.id.home_page);
        find = (RadioButton) findViewById(R.id.find);
        my = (RadioButton) findViewById(R.id.my);
        group = (RadioGroup) findViewById(R.id.group);
        fragments.add(new HomeFragment());
        fragments.add(new FindFragment());
        fragments.add(new MyFragment());
    }

    private void initData() {
        FragmentPagerAdapter adapter = new FragmentPagerAdapter(getSupportFragmentManager()) {
            @Override
            public Fragment getItem(int position) {
                return fragments.get(position);
            }

            @Override
            public int getCount() {
                return fragments.size();
            }
        };
        pager.setAdapter(adapter);
        group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int i) {
                switch (i) {
                    case R.id.home_page:
                        pager.setCurrentItem(0, false);
                        break;
                    case R.id.find:
                        pager.setCurrentItem(1, false);
                        break;
                    case R.id.my:
                        pager.setCurrentItem(2, false);
                        break;
                }
            }
        });
        pager.setCurrentItem(0);
        pager.setOnPageChangeListener(new MyLazyViewpager.OnPageChangeListener() {
            @Override
            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            }
            @Override
            public void onPageSelected(int position) {
                switch (position) {
                    case 0:
                        group.check(R.id.home_page);
                        break;
                    case 1:
                        group.check(R.id.find);
                        break;
                    case 2:
                        group.check(R.id.my);
                        break;
                }
            }

            @Override
            public void onPageScrollStateChanged(int state) {

            }
        });
    }