TabHost

activity_main.xml
=============
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android1="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TabHost
        android1:id="@android:id/tabhost"
        android1:layout_width="match_parent"
        android1:layout_height="match_parent"
        android1:layout_alignParentLeft="true"
        android1:layout_alignParentTop="true" >

        <LinearLayout
            android1:layout_width="match_parent"
            android1:layout_height="match_parent"
            android1:orientation="vertical" >

            <TabWidget
                android1:id="@android:id/tabs"
                android1:layout_width="match_parent"
                android1:layout_height="wrap_content" >
            </TabWidget>

            <FrameLayout
                android1:id="@android:id/tabcontent"
                android1:layout_width="match_parent"
                android1:layout_height="match_parent" >

                <LinearLayout
                    android1:id="@+id/tab1"
                    android1:layout_width="match_parent"
                    android1:layout_height="match_parent"
                    android:orientation="vertical">
                    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/one"
       />
                </LinearLayout>

                <LinearLayout
                    android1:id="@+id/tab2"
                    android1:layout_width="match_parent"
                    android1:layout_height="match_parent"
                    android:orientation="vertical" >
                    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/three"
       />
                </LinearLayout>
  <LinearLayout
                    android1:id="@+id/tab3"
                    android1:layout_width="match_parent"
                    android1:layout_height="match_parent"
                    android:orientation="vertical" >
                 
                </LinearLayout>
             
            </FrameLayout>
        </LinearLayout>
    </TabHost>

</RelativeLayout>

help.xml
----------
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/two"
       />

</LinearLayout>

ActivityMain.java
==============
package com.kundan.tabhost;

import android.os.Bundle;
import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.view.Menu;
import android.widget.TabHost;

@SuppressWarnings("deprecation")
public class MainActivity extends TabActivity {
TabHost tabs;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tabs=(TabHost) findViewById(android.R.id.tabhost);
tabs.setup();
TabHost.TabSpec spec=tabs.newTabSpec("tag1");

spec.setContent(R.id.tab1);
spec.setIndicator("img1");
tabs.addTab(spec);

spec=tabs.newTabSpec("tag2");
spec.setContent(R.id.tab2);
spec.setIndicator("img2");
tabs.addTab(spec);

spec=tabs.newTabSpec("tag3");
spec.setContent(R.id.tab3);
spec.setIndicator("img3");
Intent i=new Intent(this,Help.class);
spec.setContent(i);
tabs.addTab(spec);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

Help.java
------------
package com.kundan.tabhost;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

public class Help extends Activity{
ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.help);
iv=(ImageView) findViewById(R.id.imageView1);
iv.setScaleType(ScaleType.CENTER_INSIDE);
}

}