动态布局位置无效 求高手解决思路

  RelativeLayout rlToolbarLayout = (RelativeLayout)LayoutInflater.from(con).inflate(R.layout.web_toolbar, null);                rlToolbarLayout.setVerticalGravity(Gravity.BOTTOM);//  这两个都不可以        rlToolbarLayout.offsetTopAndBottom(R.id.web_webview);//这两个都不可以                LayoutParams lParams=new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);                this.addContentView(rlToolbarLayout,lParams);

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@id/web_toolbar_rl_layout"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:background="#EE000000"    android:gravity="center_horizontal"    android:padding="4dip"    android:layout_gravity="bottom" >    <ImageView        android:id="@id/web_toolbar_iv_return"        android:layout_width="38dip"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_marginLeft="15dip"        android:layout_marginRight="15dip"        android:src="@drawable/web_toolbar_return" >    </ImageView>    <ImageView        android:id="@id/web_toolbar_iv_refresh"        android:layout_width="38dip"        android:layout_height="wrap_content"        android:layout_marginLeft="15dip"        android:layout_marginRight="15dip"        android:layout_toRightOf="@id/web_toolbar_iv_return"        android:src="@drawable/web_toolbar_refresh" >    </ImageView>    <ImageView        android:id="@id/web_toolbar_iv_prev_page"        android:layout_width="38dip"        android:layout_height="wrap_content"        android:layout_marginLeft="15dip"        android:layout_marginRight="15dip"        android:layout_toRightOf="@id/web_toolbar_iv_refresh"        android:src="@drawable/web_toolbar_prev_page" >    </ImageView>    <ImageView        android:id="@id/web_toolbar_iv_next_page"        android:layout_width="38dip"        android:layout_height="wrap_content"        android:layout_marginLeft="15dip"        android:layout_marginRight="15dip"        android:layout_toRightOf="@id/web_toolbar_iv_prev_page"        android:src="@drawable/web_toolbar_next_page" >    </ImageView></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:layout_gravity="bottom"    android:orientation="vertical" >    <RelativeLayout        android:id="@+id/title"        android:layout_width="fill_parent"        android:layout_height="44dip"        android:layout_alignParentTop="true"        android:background="@drawable/wcity_title"        android:orientation="vertical" >        <TextView            android:id="@id/txt_city_name"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginRight="60dip"            android:layout_marginTop="10dip"            android:text="福州"            android:textColor="@color/white"            android:textSize="18sp" />    </RelativeLayout>    <WebView        android:id="@id/web_webview"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:layout_below="@id/title"        android:scrollbarSize="0dip" >    </WebView>    <LinearLayout        android:id="@id/web_pb_layout"        android:layout_width="fill_parent"        android:layout_height="25dip"        android:layout_below="@id/title"        android:background="#EE21185A"        android:gravity="center"        android:orientation="horizontal"        android:visibility="gone" >        <ProgressBar            android:id="@+id/pb_webview"            style="?android:attr/progressBarStyleSmall"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_gravity="center" />    </LinearLayout></RelativeLayout>