android 动态生成顶部导航栏

/**生成顶部导航**/
	public void initRadioButton(final List<InforSubBean2> list){
		 DisplayMetrics dm = new DisplayMetrics();  
		 getWindowManager().getDefaultDisplay().getMetrics(dm);  
		 //屏幕的宽度
		 width = dm.widthPixels;  
		 //分辨率
		 density =  dm.density;
		 //每个分类的宽度
		 itemWidth = (width-20)/3;
		//分类的个数
		int size = list.size();
		radioGroup.removeAllViews();
//		if (size>1) {
		if (size>0) {
			int total = width;
			if (itemWidth*size+(size-1)*10+20>width) {
				total = itemWidth*size+(size-1)*10+20; //每个分类的宽度+分类的间距+左右两边的间距
			}
			horizontalScrollView.setLayoutParams(new LinearLayout.LayoutParams(-1, (int) (50*density)) );
			HorizontalScrollView.LayoutParams layoutParams = new HorizontalScrollView.LayoutParams(total, (int) (40*density));
			layoutParams.leftMargin=10;
			layoutParams.rightMargin=10;
			layoutParams.bottomMargin=5;
//			layoutParams.topMargin=(int) (10*density);
			layoutParams.gravity=Gravity.BOTTOM;
			
			radioGroup.setLayoutParams(layoutParams);
			horizontalScrollView.setVisibility(View.VISIBLE);
			
			RadioButton radioButton = null;
			InforSubBean2 childVO;
			for (int i = 0; i < size; i++) {
				childVO = list.get(i);
				if (childVO==null) {
					
					return;
				}
				
				radioButton= (RadioButton) LayoutInflater.from(getApplicationContext()).inflate(R.layout.radiobuttton, null);
				
				if (i==0) {
					radioButton.setChecked(true);
					sub_id = list.get(0).moduleId;
					System.out.println("----------------0");
					request_sub_list();
				}
				
				radioButton.setId(i);
				radioButton.setText(childVO.moduleName);
				radioGroup.addView(radioButton);
				radioButton.setLayoutParams(new RadioGroup.LayoutParams(itemWidth,(int) (40*density)));}

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="50dip"
    android:background="@drawable/top_bg"
    android:orientation="vertical" >


    <HorizontalScrollView
        android:id="@+id/mailbox_horizontalscrollView"
        android:layout_width="fill_parent"
        android:layout_height="50dp"
        android:background="@drawable/top_bg"
        android:scrollbars="none"
        android:visibility="gone" >


        <RadioGroup
            android:id="@+id/mailbox_title_group"
            android:layout_width="fill_parent"
            android:layout_height="40dp"
            android:layout_marginLeft="2dp"
            android:layout_marginRight="2dp"
            android:layout_marginTop="8dp"
            android:orientation="horizontal" >


            <!--
               <RadioButton 
   			android:text="李晨晨"
   			android:id="@+id/personal_mime"
   			android:checked="true"
   			android:layout_marginLeft="5dp"
   			style="@style/title_btn"/>
   		<RadioButton 
   			android:text="李星星"
   			android:id="@+id/personal_prop"
   			style="@style/title_btn"/>
   		<LinearLayout android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"/>
            -->
        </RadioGroup>
    </HorizontalScrollView>


</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>




    <RadioButton 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/radio"
        android:layout_width="90dip"
        android:layout_height="40dip"
        
        android:gravity="center"
        android:button="@null"
        android:background="@drawable/radio_select"
        android:text="分类"
        />

核心代码就是这上面的