android中如何在等分LinearLayout

xml

1. <LinearLayout   
2.       android:orientation="horizontal"  
3.       android:layout_width="fill_parent"  
4.       android:layout_height="fill_parent"  
5.       android:layout_weight="1">    
6. </LinearLayout>
   

java

       final LinearLayout.LayoutParams lpWW = new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT,1.0f);