Android：PopupWindow简单弹窗改进版

public class MainActivity extends TabActivity {
    private PopupWindow pop; 
    private TabHost tabhost;
    private RadioGroup radiogroup;
    private RadioButton tab1,tab2;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);
        
        //将layout的xml布局文件实例化为View类对象
        LayoutInflater inflater =LayoutInflater.from(this);        
        View view =inflater.inflate(R.layout.mypop, null);
        
        //创建PopupWindow，参数为显示对象，宽，高
        pop =new PopupWindow(view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        

        //PopupWindow的设置
        pop.setBackgroundDrawable(new BitmapDrawable());        
        //点击外边消失
        pop.setOutsideTouchable(true);      
        //设置此参数获得焦点，否则无法点击 
        pop.setFocusable(true);
        
        //设置文本监听事件
        TextView text =(TextView) findViewById(R.id.topmenu);
        text.setOnClickListener(new OnClickListener(){

            @Override
            //判断是否已经显示，点击时如显示则隐藏，隐藏则显示
            public void onClick(View v) {
                if(pop.isShowing()){
                    pop.dismiss();
                }else{
                    pop.showAsDropDown(v);
                }
                
            }

                    
            
        });
        
             
       //tabhost
        tabhost=getTabHost();
        tabhost.addTab(tabhost.newTabSpec("a").setContent(R.id.tab1).setIndicator("a"));
        tabhost.addTab(tabhost.newTabSpec("b").setContent(R.id.tab2).setIndicator("b"));
        
      //选项
        radiogroup = (RadioGroup) view.findViewById(R.id.radiogroup);   
       //设置radiobutton监听事件
       radioCheckListener l =new radioCheckListener();
       radiogroup.setOnCheckedChangeListener(l);
    }
    
    
    //点击菜单，切换卡并让菜单消失
    public class radioCheckListener implements OnCheckedChangeListener{

        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            // TODO Auto-generated method stub
            switch(checkedId){
            case R.id.tabps:
                tabhost.setCurrentTab(0);
                pop.dismiss();
                break;
            case R.id.tabhtml:
                tabhost.setCurrentTab(1);
                pop.dismiss();
                break;
            }                    
                
        }
        
    }
    
   
}

<?xml version="1.0" encoding="utf-8"?>
    <RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"
         android:background="#393C39"
         android:padding="10dp"
         android:id="@+id/radiogroup"
         >
         
         <RadioButton            
             android:id="@+id/tabps"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:text="Photoshop"
               android:textColor="#ffffff"
               android:checked="true"
             />
         
          <RadioButton 
              android:id="@+id/tabhtml"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:textColor="#ffffff"
             android:text="HTML"
             />

     </RadioGroup>

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@android:id/tabhost"
     >
<LinearLayout 
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    >
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/titlebg"
        android:gravity="center"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/topmenu"
            android:layout_width="wrap_content"
            android:layout_height="46dp"
            android:clickable="true"
            android:drawableRight="@drawable/ic_menu_trangle_down"
            android:gravity="center_vertical"
            android:text="全部课程"
            android:textColor="#ffffff" />
    </LinearLayout>
     
    <TabWidget 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@android:id/tabs"
        android:visibility="gone"
        >        
    </TabWidget>
    
    <FrameLayout 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@android:id/tabcontent"
        >
        <LinearLayout 
            android:id="@+id/tab1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:background="#ff0000"
            ></LinearLayout>
         <LinearLayout 
            android:id="@+id/tab2"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:background="#000000"
            ></LinearLayout>
    </FrameLayout>
</LinearLayout>

</TabHost>