至于顶部导航的具体要用到的图片和布局大家自己调整。

        由于前面已经介绍了底部菜单栏了，所以一些重复性的代码就不贴上来了，最后我也会把下载地址贴上大家有兴趣自行下载。

        首先看一些顶部导航栏的布局文件：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <include layout="@layout/head" />  <LinearLayout     android:layout_width="fill_parent"    android:layout_height="wrap_content">            <RadioGroup                android:id="@+id/add_tab_group"                android:layout_width="fill_parent"                android:layout_height="wrap_content"                android:gravity="center"                android:paddingTop="6dp"                android:paddingBottom="6dp"                android:background="@drawable/big_button_up"                android:orientation="horizontal"                 >
                <RadioButton                    android:id="@+id/main_tab_addExam"                    style="@style/MMTabButton1"                    android:layout_weight="1.0"                    android:checked="true"                    android:text="添加考试" />
                <RadioButton                    android:id="@+id/main_tab_myExam"                    style="@style/MMTabButton1"                    android:layout_weight="1.0"                    android:text="我的考试" />
                <RadioButton                    android:id="@+id/main_tab_message"                    style="@style/MMTabButton1"                    android:layout_weight="1.0"                    android:text="我的通知" />
                <RadioButton                    android:id="@+id/main_tab_testing"                    style="@style/MMTabButton1"                    android:layout_weight="1.0"                    android:text="测试" />                <RadioButton                    android:id="@+id/main_tab_settings"                    style="@style/MMTabButton1"                    android:layout_weight="1.0"                    android:text="设置" />            </RadioGroup>       </LinearLayout>    <LinearLayout        android:id="@+id/container"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:layout_weight="1" >    </LinearLayout></LinearLayout>

      具体宽度样式大家可以自己调节，然后看一下核心类：

  

import android.app.ActivityGroup;import android.app.AlertDialog;import android.app.LocalActivityManager;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.Button;import android.widget.LinearLayout;import android.widget.RadioGroup;import android.widget.TextView;import android.widget.RadioGroup.OnCheckedChangeListener;
public class AddExamActivity extends ActivityGroup {
	protected Button btn_leftTop, btn_rightTop;	protected TextView tv_head;	private  static LocalActivityManager manager;	private  RadioGroup radioGroup;	private  static LinearLayout container;	public  static Context context;	@Override	protected void onCreate(Bundle savedInstanceState) {		// TODO Auto-generated method stub		super.onCreate(savedInstanceState);		setContentView(R.layout.addexam);		context=this;		initHead();		manager=getLocalActivityManager();		container= (LinearLayout)findViewById(R.id.container);        radioGroup=(RadioGroup) this.findViewById(R.id.add_tab_group);        container.removeAllViews();		container.addView(manager.startActivity(				"PAGE_0",				new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))				.getDecorView());        radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {			@Override			public void onCheckedChanged(RadioGroup group, int checkedId) {				// TODO Auto-generated method stub				switch (checkedId) {				case R.id.main_tab_addExam://添加考试					container.removeAllViews();					container.addView(manager.startActivity(							"PAGE_0",							new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))							.getDecorView());					break;				case R.id.main_tab_myExam://我的考试					container.removeAllViews();					container.addView(manager.startActivity(							"PAGE_1",							new Intent(context, MyMessageActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))							.getDecorView());					break;				case R.id.main_tab_message://我的通知					container.removeAllViews();		            container.addView(manager.startActivity(		            		"PAGE_2",		                    new Intent(context, SettingActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))		                    .getDecorView());					break;				case R.id.main_tab_testing://测试					container.removeAllViews();		            container.addView(manager.startActivity(		            		"PAGE_3",		                    new Intent(context, TestingActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))		                    .getDecorView());					break;				case R.id.main_tab_settings://设置					container.removeAllViews();		            container.addView(manager.startActivity(		            		"PAGE_4",		                    new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))		                    .getDecorView());					break;				default:					//tabHost.setCurrentTabByTag("我的考试");					break;				}			}		});	}    public static void changeTo(){    	Animation slideLeftIn = AnimationUtils.loadAnimation(context, R.anim.slide_bottom_in_no_alpha);    	container.removeAllViews();        container.addView(manager.startActivity(        		"PAGE_4",                new Intent(context, MyExamActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP))                .getDecorView());        container.startAnimation(slideLeftIn);    }	protected void initHead() {		btn_leftTop = (Button) findViewById(R.id.btn_leftTop);		btn_rightTop = (Button) findViewById(R.id.btn_rightTop);		tv_head = (TextView) findViewById(R.id.tv_head);		btn_leftTop.setVisibility(View.INVISIBLE);		tv_head.setText("添加考试");	}   @Override	public boolean onKeyDown(int keyCode, KeyEvent event) {		// TODO Auto-generated method stub
		if (keyCode == KeyEvent.KEYCODE_BACK) {
			AlertDialog.Builder builder = new AlertDialog.Builder(getParent());			builder.setMessage("你确定退出吗？")					.setCancelable(false)					.setPositiveButton("确定",							new DialogInterface.OnClickListener() {								public void onClick(DialogInterface dialog,										int id) {									finish();									System.exit(0);								}							})					.setNegativeButton("返回",							new DialogInterface.OnClickListener() {								public void onClick(DialogInterface dialog,										int id) {									dialog.cancel();								}							});			AlertDialog alert = builder.create();			alert.show();			return true;		}
		return super.onKeyDown(keyCode, event);	}}

      这里继承了ActivityGroup，没有使用过的朋友从百度搜索下就明白了。

     使用了LocalActivityManager启动子activity，这里Context和LinearLayout使用了static静态的，这是因为变态的需求使我不得不这样做，希望大家不要把这两个变量设置成static的，因为static的生命周期很长特别是Context不要设置成static，这样的话当前的activity很难被销毁的。其实使用tabhost完全可以实现，但是为什么没使用tabhost的我相信大家都明白，如果不考虑内存的话我也会使用，哈哈！