当我在片段之间滑动时，tabindicator 不会在 tablayout 中从一个选项卡滑动到另一个选项卡。字体的突出显示也没有改变

Question

public class LoginRegister extends AppCompatActivity implements SignUpFragment.OnFragmentInteractionListener ,SignInFragment.OnFragmentInteractionListener{
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login_register);
    final TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout_signup);
    tabLayout.addTab(tabLayout.newTab().setText("Sign Up"));
    tabLayout.addTab(tabLayout.newTab().setText("Sign in"));
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);        
    final ViewPager pager =(ViewPager) findViewById(R.id.loginpager);
    final SigninPagerAdapter adapter = new SigninPagerAdapter(getSupportFragmentManager(),tabLayout.getTabCount());
    pager.setAdapter(adapter);
    tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            pager.setCurrentItem(tab.getPosition());
        }
        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
}
        @Override
        public void onTabReselected(TabLayout.Tab tab) {
        }
    });

当我滑过片段时，标签的高亮没有改变，但是当我触摸时它工作正常 tabs.When 我触摸它们，标签指示器从左到右滑动很好，字体颜色为标签也看起来突出显示。我认为问题出在这段代码中

pager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        }

        @Override
        public void onPageSelected(int position) {


        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

}


@Override
public void onFragmentInteraction(Uri uri) {

}
}

我应该怎么做才能突出显示当前标签...

Answer 1

您不应该在 tablayout 上添加 Tab()，因为您已经设置了视图寻呼机适配器

执行以下操作，应该可以正常工作

public class LoginRegister extends AppCompatActivity implements SignUpFragment.OnFragmentInteractionListener ,SignInFragment.OnFragmentInteractionListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login_register);

    final SigninPagerAdapter adapter = new SigninPagerAdapter(getSupportFragmentManager());

    final ViewPager pager = (ViewPager) findViewById(R.id.loginpager);
    pager.setAdapter(adapter);

    final TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout_signup);
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
    tabLayout.setupWithViewPager(pager);

    }
}

和SignInPagerAdapter

public class SigninPagerAdapter extends FragmentStatePagerAdapter {

    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {

        switch (position) {
        case 0: 
            return SingnUpFragment.newInstance()
        case 1: 
            return SignInFragment.newInstance()
        default:
            return null;
        }
    }

    @Override
    public int getCount() {
        //return the number of tabs you want in your tabLayout
        return 2;
    }


    @Override
    public CharSequence getPageTitle(int position) {
        //this is where you set the titles
        switch(position) {
            case 0: 
                return "Sign Up";
            case 1:
                return "Sign In";
        }
        return null;
    }

Answer 2

更改选中和未选中选项卡的颜色。在您的 LoginRegister.java 文件中使用以下代码：

//tabLayout.setTabTextColors(unselectedTabColor, selectedTabColor)
        tabLayout.setTabTextColors(Color.parseColor("#627179"), Color.parseColor("#BF4A32"));

Answer 3

我找到了我的解决方案。

tabLayout.setupWithViewPager(pager);

此方法轻松设置所有内容。

Answer 4

尝试在您的代码中添加：

 mTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {

            //THIS!!
            if (mViewPager != null) {
                mViewPager.setCurrentItem(tab.getPosition());

            }
        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {

        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {

        }
    });

它解决了我的问题。

Answer 5

补充说明。

最好的办法是最后调用 tabLayout.setupWithViewPager(viewPager)。

至少，不要在调用 tabLayout.setupWithViewPager(viewPager) 之后立即调用 viewPager.clearOnPageChangeListeners() 或 viewPager.setOnPageChangeListener()，因为这会删除 ViewPager 滚动时 TabLayout 使用的侦听器.

当我在片段之间滑动时，tabindicator 不会在 tablayout 中从一个选项卡滑动到另一个选项卡。字体的突出显示也没有改变

tabindicator is not sliding from one to another tab in tablayout when I swipe between fragments. Highlighting of font is also not changing

android

tabs

android-tablayout