获取选项卡标题onCreate选项卡

<android.support.design.widget.TabLayout
    android:id="@+id/tabLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:tabMode="fixed"
    app:tabGravity="fill" />

<android.support.v4.view.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

TabLayout tabLayout = findViewById(R.id.tabLayout);
ViewPager viewPager = findViewById(R.id.viewPager);
viewPager.setAdapter(new MyPagerAdapter(getSupportFragmentManager()));
tabLayout.setupWithViewPager(viewPager);

TabLayout.Tab currentTab = tabLayout.getTabAt(viewPager.getCurrentItem());
String currentTitle = currentTab.getText().toString();