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

<FrameLayout
    android:id="@+id/frame1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="1" >
</FrameLayout>

<FrameLayout
    android:id="@+id/frame2"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="3" >
</FrameLayout>

</LinearLayout>

NewFragment fragment = new NewFragment();
    FragmentManager fm = getFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();
    ft.add(R.id.frame1, fragment);
    ft.commit();

<LinearLayout
          android:layout_width="fill_parent"
          android:layout_height="fill_parent">

<fragment android:name="com.example.android.fragments.HeadlinesFragment"
          android:id="@+id/headlines_fragment"
          android:layout_weight="1"
          android:layout_width="0dp"
          android:layout_height="match_parent" />

<fragment android:name="com.example.android.fragments.ArticleFragment"
          android:id="@+id/article_fragment"
          android:layout_weight="3"
          android:layout_width="0dp"
          android:layout_height="match_parent" />

</LinearLayout>