动态设置控件高度、位置

有布局大致如下：  
 <LinearLayout  
        android:layout_width="match_parent"  
        android:layout_height="match_parent"  
        android:orientation="vertical" >  
  
        <FrameLayout  
            android:id="@+id/framelayout"  
            android:layout_width="match_parent"  
            android:layout_height="200dip" >  
  
           ---------  
       ---------  
             
        </FrameLayout>  
 </LinearLayout>  
  
  
  
现要在代码中设置framelayout的高度:    
    
//LinearLayout 为父容器布局    
LinearLayout.LayoutParams p = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,  
                                        LinearLayout.LayoutParams.MATCH_PARENT);    
framelayout.setLayoutParams(p); //设置framelayout宽高（MATCH_PARENT，MATCH_PARENT）

//设置tv位置（垂直居中、居右,距离右边15px）  
RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,  
                    RelativeLayout.LayoutParams.MATCH_PARENT);  
tv.setGravity(Gravity.RIGHT|Gravity.CENTER_VERTICAL);  //tv的父容器为RelativeLayout
rl.rightMargin = ScreenUtils.dipConvertPx(mContext, 15);  
tv.setLayoutParams(rl);


/** 
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素) 
     * @param mContext 
     * @param dpValue 
     */  
    public static int dipConvertPx(Context mContext, float dpValue) {  
        try {  
            float scale = mContext.getResources().getDisplayMetrics().density;  
            return (int) (dpValue * scale + 0.5f);  
        } catch (Exception e) {  
        }  
        return -1;  
    }

<RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <include
            android:id="@+id/ahm_top_relative"
            layout="@layout/include_homemain_top" />

        <ViewPager
            android:id="@+id/ahm_viewpager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@+id/ahm_top_relative"
            android:scrollbars="none" />

        <RadioGroup
            android:id="@+id/ahm_radiogroup"
            android:layout_width="match_parent"
            android:layout_height="55.0dip"
            android:layout_alignParentBottom="true"
            android:background="@color/bg_E6ffffff"
            android:orientation="horizontal"
            android:paddingBottom="2dp"
            android:paddingTop="2dp">

            <RadioButton
                android:id="@+id/ahm_message_rb"
                ----
		---- />

            <RadioButton
                android:id="@+id/ahm_index_rb"
                -----
		-----/>

            <RadioButton
                android:id="@+id/ahm_wo_rb"
                -----
		-----/>
        </RadioGroup>


    </RelativeLayout>



现要在代码中设置 viewpager位于ahm_radiogroup之上（android:layout_above="@+id/ahm_radiogroup"）
RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
							RelativeLayout.LayoutParams.MATCH_PARENT);
rl.addRule(RelativeLayout.ABOVE, R.id.ahm_radiogroup);
ahm_viewpager.setLayoutParams(rl);




现要在代码中设置 viewpager不位于ahm_radiogroup之上(还原到布局xml)
RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
							RelativeLayout.LayoutParams.MATCH_PARENT);
rl.addRule(RelativeLayout.BELOW,R.id.ahm_top_relative);//viewpager位于ahm_top_relative之下
rl.addRule(RelativeLayout.ABOVE, 0);//清除刚才设置的（位于ahm_radiogroup之上）
am_viewpager.setLayoutParams(rla);