Android仿微信底部菜单栏功能显示未读消息数量

<?xml version="1.0" encoding="UTF-8"?> 
<TabHost xmlns:android="http://schemas.android.com/apk/res/android" 
 android:id="@android:id/tabhost" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" > 
 
 <LinearLayout 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:background="@color/bg_gray" 
  android:orientation="vertical" > 
 
  <FrameLayout 
   android:id="@android:id/tabcontent" 
   android:layout_width="fill_parent" 
   android:layout_height="0.0dip" 
   android:layout_weight="1.0" /> 
 
  <TabWidget 
   android:id="@android:id/tabs" 
   android:layout_width="fill_parent" 
   android:layout_height="wrap_content" 
   android:layout_weight="0.0" 
   android:visibility="gone" /> 
 
  <FrameLayout 
   android:layout_width="fill_parent" 
   android:layout_height="wrap_content" > 
 
   <RadioGroup 
    android:id="@+id/main_tab_group" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_gravity="bottom" 
    android:background="@drawable/bottom1" 
    android:gravity="bottom" 
    android:orientation="horizontal" 
     > 
 
    <RadioButton 
     android:id="@+id/main_tab_addExam" 
     style="@style/MMTabButton" 
     android:layout_weight="1.0"  
     android:drawableTop="@drawable/bg_checkbox_icon_menu_0" 
     android:text="添加考试" /> 
 
    <RadioButton 
     android:id="@+id/main_tab_myExam" 
     style="@style/MMTabButton" 
     android:layout_weight="1.0" 
     android:checked="true" 
     android:drawableTop="@drawable/bg_checkbox_icon_menu_1" 
     android:text="我的考试" /> 
 
    <RadioButton 
     android:id="@+id/main_tab_message" 
     style="@style/MMTabButton" 
     android:layout_weight="1.0" 
     android:drawableTop="@drawable/bg_checkbox_icon_menu_2" 
     android:text="我的通知" /> 
 
    <RadioButton 
     android:id="@+id/main_tab_settings" 
     style="@style/MMTabButton" 
     android:layout_weight="1.0"  
     android:drawableTop="@drawable/bg_checkbox_icon_menu_3" 
     android:text="设置" /> 
   </RadioGroup> 
 
   <TextView 
    android:id="@+id/main_tab_new_message" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center_horizontal|top" 
    android:layout_marginLeft="60dip" 
    android:layout_marginTop="1dip" 
    android:background="@drawable/tips" 
    android:gravity="center" 
    android:text="1" 
    android:textColor="#ffffff" 
    android:textSize="10sp" 
    android:visibility="gone" /> 
  </FrameLayout> 
 </LinearLayout> 
 
</TabHost> 

<style name="MMTabButton"> 
 <item name="android:textSize">12.0dip</item> 
 <item name="android:gravity">center_horizontal</item> 
 <item name="android:background">@drawable/bg_checkbox_menus</item> 
 <item name="android:layout_width">fill_parent</item> 
 <item name="android:layout_height">wrap_content</item> 
 <item name="android:button">@null</item> 
 <item name="android:textColor">@color/white</item> 
 <item name="android:layout_weight">1.0</item> 
 <item name="android:paddingBottom">2.0dip</item> 
 <item name="android:paddingTop">2.0dip</item> 
</style> 

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
 <item 
 android:state_checked="false" 
 android:drawable="@drawable/mm_trans" /> 
 <item 
 android:state_checked="true" 
 android:drawable="@drawable/home_btn_bg" /> 
</selector> 

package cn.com.karl.test; 
 
import android.app.TabActivity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.view.Window; 
import android.widget.RadioGroup; 
import android.widget.RadioGroup.OnCheckedChangeListener; 
import android.widget.TabHost; 
import android.widget.TextView; 
 
public class MainActivity extends TabActivity { 
 /** Called when the activity is first created. */ 
 private TabHost tabHost; 
 private TextView main_tab_new_message; 
  
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
  setContentView(R.layout.main); 
   
  main_tab_new_message=(TextView) findViewById(R.id.main_tab_new_message); 
  main_tab_new_message.setVisibility(View.VISIBLE); 
  main_tab_new_message.setText("10"); 
   
  tabHost=this.getTabHost(); 
  TabHost.TabSpec spec; 
  Intent intent; 
 
  intent=new Intent().setClass(this, AddExamActivity.class); 
  spec=tabHost.newTabSpec("添加考试").setIndicator("添加考试").setContent(intent); 
  tabHost.addTab(spec); 
   
  intent=new Intent().setClass(this,MyExamActivity.class); 
  spec=tabHost.newTabSpec("我的考试").setIndicator("我的考试").setContent(intent); 
  tabHost.addTab(spec); 
   
  intent=new Intent().setClass(this, MyMessageActivity.class); 
  spec=tabHost.newTabSpec("我的通知").setIndicator("我的通知").setContent(intent); 
  tabHost.addTab(spec); 
   
  
  intent=new Intent().setClass(this, SettingActivity.class); 
  spec=tabHost.newTabSpec("设置").setIndicator("设置").setContent(intent); 
  tabHost.addTab(spec); 
  tabHost.setCurrentTab(1); 
   
  RadioGroup radioGroup=(RadioGroup) this.findViewById(R.id.main_tab_group); 
  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 
     tabHost.setCurrentTabByTag("添加考试"); 
     break; 
    case R.id.main_tab_myExam://我的考试 
     tabHost.setCurrentTabByTag("我的考试"); 
     break; 
    case R.id.main_tab_message://我的通知 
     tabHost.setCurrentTabByTag("我的通知"); 
     break; 
    case R.id.main_tab_settings://设置 
     tabHost.setCurrentTabByTag("设置"); 
     break; 
    default: 
     //tabHost.setCurrentTabByTag("我的考试"); 
     break; 
    } 
   } 
  }); 
 } 
  
  
}