Android仿微信顶/底部菜单栏效果

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package com.example.tabexample; 
 
import java.util.ArrayList; 
import java.util.List; 
import android.os.Bundle; 
import android.app.Activity; 
import android.support.v4.view.PagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.support.v4.view.ViewPager.OnPageChangeListener; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.view.Window; 
import android.widget.ImageButton; 
import android.widget.LinearLayout; 
 
public class MainActivity extends Activity implements 
 android.view.View.OnClickListener { 
 
 private ViewPager mViewPager;// 用来放置界面切换 
 private PagerAdapter mPagerAdapter;// 初始化View适配器 
 private List mViews = new ArrayList();// 用来存放Tab01-04 
 // 四个Tab，每个Tab包含一个按钮 
 private LinearLayout mTabWeiXin; 
 private LinearLayout mTabAddress; 
 private LinearLayout mTabFrd; 
 private LinearLayout mTabSetting; 
 // 四个按钮 
 private ImageButton mWeiXinImg; 
 private ImageButton mAddressImg; 
 private ImageButton mFrdImg; 
 private ImageButton mSettingImg; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
 super.onCreate(savedInstanceState); 
 requestWindowFeature(Window.FEATURE_NO_TITLE); 
 setContentView(R.layout.activity_main); 
 initView(); 
 initViewPage(); 
 initEvent(); 
 } 
 
 private void initEvent() { 
 mTabWeiXin.setOnClickListener(this); 
 mTabAddress.setOnClickListener(this); 
 mTabFrd.setOnClickListener(this); 
 mTabSetting.setOnClickListener(this); 
 mViewPager.setOnPageChangeListener(new OnPageChangeListener() { 
 /** 
 *ViewPage左右滑动时 
 */ 
 @Override 
 public void onPageSelected(int arg0) { 
 int currentItem = mViewPager.getCurrentItem(); 
 switch (currentItem) { 
 case 0: 
 resetImg(); 
 mWeiXinImg.setImageResource(R.drawable.tab_weixin_pressed); 
 break; 
 case 1: 
 resetImg(); 
 mAddressImg.setImageResource(R.drawable.tab_address_pressed); 
 break; 
 case 2: 
 resetImg(); 
 mFrdImg.setImageResource(R.drawable.tab_find_frd_pressed); 
 break; 
 case 3: 
 resetImg(); 
 mSettingImg.setImageResource(R.drawable.tab_settings_pressed); 
 break; 
 default: 
 break; 
 } 
 } 
 
 @Override 
 public void onPageScrolled(int arg0, float arg1, int arg2) { 
 
 } 
 
 @Override 
 public void onPageScrollStateChanged(int arg0) { 
 
 } 
 }); 
 } 
 
 /** 
 * 初始化设置 
 */ 
 private void initView() { 
 mViewPager = (ViewPager) findViewById(R.id.id_viewpage); 
 // 初始化四个LinearLayout 
 mTabWeiXin = (LinearLayout) findViewById(R.id.id_tab_weixin); 
 mTabAddress = (LinearLayout) findViewById(R.id.id_tab_address); 
 mTabFrd = (LinearLayout) findViewById(R.id.id_tab_frd); 
 mTabSetting = (LinearLayout) findViewById(R.id.id_tab_settings); 
 // 初始化四个按钮 
 mWeiXinImg = (ImageButton) findViewById(R.id.id_tab_weixin_img); 
 mAddressImg = (ImageButton) findViewById(R.id.id_tab_address_img); 
 mFrdImg = (ImageButton) findViewById(R.id.id_tab_frd_img); 
 mSettingImg = (ImageButton) findViewById(R.id.id_tab_settings_img); 
 } 
 
 /** 
 * 初始化ViewPage 
 */ 
 private void initViewPage() { 
 
 // 初妈化四个布局 
 LayoutInflater mLayoutInflater = LayoutInflater.from(this); 
 View tab01 = mLayoutInflater.inflate(R.layout.tab01, null); 
 View tab02 = mLayoutInflater.inflate(R.layout.tab02, null); 
 View tab03 = mLayoutInflater.inflate(R.layout.tab03, null); 
 View tab04 = mLayoutInflater.inflate(R.layout.tab04, null); 
 
 mViews.add(tab01); 
 mViews.add(tab02); 
 mViews.add(tab03); 
 mViews.add(tab04); 
 
 // 适配器初始化并设置 
 mPagerAdapter = new PagerAdapter() { 
 
 @Override 
 public void destroyItem(ViewGroup container, int position, 
 Object object) { 
 container.removeView(mViews.get(position)); 
 
 } 
 
 @Override 
 public Object instantiateItem(ViewGroup container, int position) { 
 View view = mViews.get(position); 
 container.addView(view); 
 return view; 
 } 
 
 @Override 
 public boolean isViewFromObject(View arg0, Object arg1) { 
 
 return arg0 == arg1; 
 } 
 
 @Override 
 public int getCount() { 
 
 return mViews.size(); 
 } 
 }; 
 mViewPager.setAdapter(mPagerAdapter); 
 } 
 
 /** 
 * 判断哪个要显示，及设置按钮图片 
 */ 
 @Override 
 public void onClick(View arg0) { 
 
 switch (arg0.getId()) { 
 case R.id.id_tab_weixin: 
 mViewPager.setCurrentItem(0); 
 resetImg(); 
 mWeiXinImg.setImageResource(R.drawable.tab_weixin_pressed); 
 break; 
 case R.id.id_tab_address: 
 mViewPager.setCurrentItem(1); 
 resetImg(); 
 mAddressImg.setImageResource(R.drawable.tab_address_pressed); 
 break; 
 case R.id.id_tab_frd: 
 mViewPager.setCurrentItem(2); 
 resetImg(); 
 mFrdImg.setImageResource(R.drawable.tab_find_frd_pressed); 
 break; 
 case R.id.id_tab_settings: 
 mViewPager.setCurrentItem(3); 
 resetImg(); 
 mSettingImg.setImageResource(R.drawable.tab_settings_pressed); 
 break; 
 default: 
 break; 
 } 
 } 
 
 /** 
 * 把所有图片变暗 
 */ 
 private void resetImg() { 
 mWeiXinImg.setImageResource(R.drawable.tab_weixin_normal); 
 mAddressImg.setImageResource(R.drawable.tab_address_normal); 
 mFrdImg.setImageResource(R.drawable.tab_find_frd_normal); 
 mSettingImg.setImageResource(R.drawable.tab_settings_normal); 
 } 
 
}