如何動態改變 AbsoluteLayout布局中其它布局的坐標

<?xml version="1.0" encoding="utf-8"?> 
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/mArtivleViewLayout" android:layout_width="fill_parent" 
android:layout_height="fill_parent" android:background="@drawable/white" 
androidrientation="vertical"> 
 
<LinearLayout android:layout_y="350px" android:layout_x="0px"   
  android:layout_width="fill_parent" android:id="@+id/TooLBarLayout" 
  android:layout_height="44px" android:gravity="center" 
  android:background="@drawable/toolbarbg" android:visibility="visible"> 
 
    <ImageView android:id="@+id/toolbar_pageup" 
      android:layout_height="wrap_content" 
      android:layout_width="wrap_content" android:src="@drawable/toolbar_pageup"> 
   </ImageView> 
</LinearLayout> 
</AbsoluteLayout> 

mLinearLayout = (LinearLayout) findViewById(R.id.TooLBarLayout);
mLinearLayout .offsetTopAndBottom(50);
mLinearLayout .offsetLeftAndRight(0);
這樣做一點返應都沒有
 

package com.test;  
 
import android.app.Activity;  
import android.os.Bundle;  
import android.view.View;  
import android.view.ViewGroup;  
import android.webkit.WebView;  
import android.widget.AbsoluteLayout;  
import android.widget.LinearLayout;  
 
public class abslayout extends Activity {  
private WebView mWebView;  
private LinearLayout linearLayout;  
 
public void onCreate(Bundle savedInstanceState) {  
super.onCreate(savedInstanceState);  
this.setContentView(R.layout.abslayout);  
 
linearLayout = (LinearLayout) ((ViewGroup) findViewById(R.id.mArtivleViewLayout)) .getChildAt(0);  
linearLayout.setLayoutParams(new AbsoluteLayout.LayoutParams(linearLayout.getWidth(), linearLayout.getHeight(),  
linearLayout.getLeft() + 5, linearLayout.getTop() + 5));  
}  
} 

<?xml version="1.0" encoding="utf-8"?> 
<AbsoluteLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" android:id="@+id/mArtivleViewLayout" 
android:layout_height="fill_parent" android:background="#ffffff"> 
 
 
<LinearLayout android:layout_y="250px" android:layout_x="0px"   
android:layout_width="320px" android:id="@+id/LinearLayout01"   
android:layout_height="50px" android:background="#000000"> 
</LinearLayout> 
 
</AbsoluteLayout> 

將inearLayout.setLayoutParams...放到一個激活動作中就可以了（如button中），
 

private class mPageUpOnClickListener implements OnClickListener {  
public void onClick(View v) {  
Log.v("AA","sfsdfsfsfsfs");  
 
linearLayout.setLayoutParams(new AbsoluteLayout.LayoutParams(  
linearLayout.getWidth(), linearLayout.getHeight(),  
linearLayout.getLeft() + 5, linearLayout.getTop() + 5));  
}  
}