将activity转化成view

package com.ct.views;

import android.app.Activity;
import android.app.ActivityGroup;
import android.app.LocalActivityManager;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;

public class MainActivity extends ActivityGroup {
    /** Called when the activity is first created. */
	private LocalActivityManager mLocalActivityManager;
	private View lyFirst;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        init();
    }
    
    private void init(){
    	mLocalActivityManager = getLocalActivityManager();
    	lyFirst = activityToView(MainActivity.this,new Intent(MainActivity.this,FirstActivity.class));
    	setContentView(lyFirst);
    }
    
    public View activityToView(Context parent, Intent intent) {
		final Window w = mLocalActivityManager.startActivity("id", intent);
		final View wd = w != null ? w.getDecorView() : null;
		if (wd != null) {
			wd.setVisibility(View.VISIBLE);
			wd.setFocusableInTouchMode(true);
			((ViewGroup) wd)
					.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
		}
		return wd;
	}
}

　或者另一种方式

用tabActivity

一：布局

<?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:background="@drawable/main_bg"
    android:orientation="vertical" 
    android:id="@+id/layout_show">
    
    <include
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        layout="@layout/title" >
    </include>
    
    <TabHost android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:layout_marginTop="2dip">

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
       <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="0.0"
            android:background="@drawable/bg_tab" 
            android:paddingLeft="15dip"
            android:paddingRight="15dip"
            android:paddingBottom="2dip"/>

    <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1.0"
            android:gravity="center"
            android:fadingEdge="none"></FrameLayout>
  		
       
    </LinearLayout>

</TabHost>
     

</LinearLayout>

　　二：activity

extends TabActivity

private void addTabHost() {

        tabHost = (AnimationTabHost) getTabHost();

        tabHost.addTab(tabHost.newTabSpec(TAB_SENT).setIndicator(TAB_SENT)
                .setContent(new Intent(this, SendMessageActivity.class)));
        tabHost.addTab(tabHost.newTabSpec(TAB_RECEIVE)
                .setIndicator(TAB_RECEIVE).setContent(
                        new Intent(this, ReceiveMessageAcitvity.class)));
        tabHost.addTab(tabHost.newTabSpec(TAB_RUBBISH)
                .setIndicator(TAB_RUBBISH).setContent(
                        new Intent(this, RubbishMessageActivity.class)));
        tabHost.addTab(tabHost.newTabSpec(TAB_DRAFTS).setIndicator(TAB_DRAFTS)
                .setContent(new Intent(this, DraftsBoxActivity.class)));
        tabHost.setCurrentTab(1);
        tabHost.setOpenAnimation(true);

    }