ViewStub

A ViewStub is an invisible, zero-sized View that can be used to lazily inflate layout resources at runtime.

ViewStub

Main layout, to include <ViewStub>.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <ViewStub
        android:id="@+id/mystub"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inflatedId="@+id/mytitle"
        android:layout="@layout/titlebar" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    
    <Button
        android:id="@+id/show"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Show ViewStub" />

</LinearLayout>

titlebar.xml, to be inflated in <ViewStub>.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:background="@android:color/background_dark">
 
    <ImageView android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:src="@drawable/ic_launcher" />
     
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
         
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Android-Coding"
            android:textColor="@android:color/white"
            android:textStyle="bold"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="http://android-coding.blogspot.com/"
            android:textColor="@android:color/white"
            android:textStyle="italic"/>
         
    </LinearLayout>
</LinearLayout>

Inflate the ViewStub in java code.

package com.example.androidviewstub;

import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewStub;
import android.widget.Button;
import android.widget.Toast;
import android.app.Activity;

public class MainActivity extends Activity {
 
 ViewStub myViewStub;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  myViewStub = (ViewStub) findViewById(R.id.mystub);
  
  Button buttonShow = (Button)findViewById(R.id.show);
  buttonShow.setOnClickListener(new OnClickListener(){

   @Override
   public void onClick(View arg0) {
    if(myViewStub.getParent() != null){
     myViewStub.inflate();
    }else{
     Toast.makeText(MainActivity.this, 
       "myViewStub.getParent() == null: replaced", 
       Toast.LENGTH_LONG).show();
    }
    
   }});
 }

}