Question

我在ViewPager中使用TabLayout，我也必须听TabReselected事件，但似乎它们是冲突的：

mViewPager.setAdapter(...);
mTabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                Toast.makeText(getActivity(), "selected...", Toast.LENGTH_LONG).show();
            }

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

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {
                Toast.makeText(getActivity(), "reselected...", Toast.LENGTH_LONG).show();
            }
});
mTabLayout.setupWithViewPager(mViewPager);

似乎当我使用setupWithViewPager（mViewPager）时，之前添加的Listener将无效。关键是当标签是[[重新选择]]时我需要做其他事情，但是如何？

Answer 1

//使用runnable，因为使用viewpager进行设置需要时间：

    viewPager.setAdapter(viewpagerAdapter);
    tabLayout.post(new Runnable() {
        @Override
        public void run() {
            tabLayout.setupWithViewPager(viewPager);

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

                    Toast.makeText(MainActivity.this, "selected...", Toast.LENGTH_LONG).show();
                }

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

                }

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

                    Toast.makeText(MainActivity.this, "reselected...", Toast.LENGTH_LONG).show();
                }
            });
        }
    });

Answer 2

您需要做的是，首先需要致电

tabLayout.setupWithViewPager(onBoardVP);

然后在onTabSelected()方法中添加mViewPager.setCurrentItem(tab.getPosition());

就像这样：

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

                    Toast.makeText(MainActivity.this, "selected...", Toast.LENGTH_LONG).show();
mViewPager.setCurrentItem(tab.getPosition());
                }

TabLayout的setOnTabSelectedListener与其setupWithViewPager冲突？

2 个答案: