android开发 include如何获取内部控件

include获取内部控件代码：
sublayout.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:background="#505050" 
> 
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="SubLayout" 
/> 
<Button 
android:id="@+id/mybutton" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text=" A Button " 
/> 
</LinearLayout> 

mail.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
> 
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="@string/hello" 
/> 
<include android:id="@+id/main1" layout="@layout/sublayout" /> 
<include android:id="@+id/main2" layout="@layout/sublayout" /> 
<Button 
android:id="@+id/startanotheractivity" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:text=" Start Another Activity " 
/> 
</LinearLayout> 

如何调用组件include进来的组件呢

package com.AndroidIncludeLayout; 

import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.Toast; 

public class AndroidIncludeLayout extends Activity { 

@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 

View subLayout1 = (View)findViewById(R.id.main1); 
View subLayout2 = (View)findViewById(R.id.main2); 
Button myButton_main1 = (Button)subLayout1.findViewById(R.id.mybutton); 
Button myButton_main2 = (Button)subLayout2.findViewById(R.id.mybutton); 
Button startAnotherActivity = (Button)findViewById(R.id.startanotheractivity); 

startAnotherActivity.setOnClickListener(new Button.OnClickListener(){ 

@Override 
public void onClick(View arg0) { 
// TODO Auto-generated method stub 
Intent intent = new Intent(); 
intent.setClass(AndroidIncludeLayout.this, AnotherActivity.class); 
startActivity(intent); 

}}); 

myButton_main1.setOnClickListener(new Button.OnClickListener(){ 

@Override 
public void onClick(View arg0) { 
// TODO Auto-generated method stub 
Toast.makeText(AndroidIncludeLayout.this, "Button 1 Pressed", Toast.LENGTH_LONG).show(); 
}}); 

myButton_main2.setOnClickListener(new Button.OnClickListener(){ 

@Override 
public void onClick(View arg0) { 
// TODO Auto-generated method stub 
Toast.makeText(AndroidIncludeLayout.this, "Button 2 Pressed", Toast.LENGTH_LONG).show(); 
}}); 
} 
}