如何使用LinearLayout添加多个片段？

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
</LinearLayout>

LinearLayout linearLayout = findViewById(R.id.linear_layout);

Fragment fragment1 = new Fragment1();
Fragment fragment2 = new Fragment2();

FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

fragmentTransaction.add(linearLayout.getId(), fragment1);
fragmentTransaction.add(linearLayout.getId(), fragment2);

fragmentTransaction.commit();

LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.MATCH_PARENT,
    LinearLayout.LayoutParams.WRAP_CONTENT
);

fragment1.setLayoutParams(layoutParams);
fragment2.setLayoutParams(layoutParams);