更改TabLayout中的文本

<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);

// 设置ViewPager与TabLayout关联
tabLayout.setupWithViewPager(viewPager);

// 获取TabLayout的标签数量
int tabCount = tabLayout.getTabCount();

// 遍历标签，设置文本
for (int i = 0; i < tabCount; i++) {
    TabLayout.Tab tab = tabLayout.getTabAt(i);
    if (tab != null) {
        tab.setText("标签" + (i + 1));
    }
}