底部tabhost研究二（TabHost放RadioGroup， RadioGroup放三个RadioButton ）

              把我没有拷出的activity       替换成别的。。就可以了     

public class TabTest extends TabActivity{
	private RadioGroup group;
	private TabHost tabHost;
	public static final String TAB_HOME="tabHome";
	public static final String TAB_MES="tabMes";
	public static final String TAB_TOUCH="tab_touch";
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.maintabs);
		group = (RadioGroup)findViewById(R.id.main_radio);
		tabHost = getTabHost();
		tabHost.addTab(tabHost.newTabSpec(TAB_HOME)
	                .setIndicator(TAB_HOME)
	                .setContent(new Intent(this,Main.class)));
	    tabHost.addTab(tabHost.newTabSpec(TAB_MES)
	                .setIndicator(TAB_MES)
	                .setContent(new Intent(this,Main2.class)));
	    tabHost.addTab(tabHost.newTabSpec(TAB_TOUCH)
	    		.setIndicator(TAB_TOUCH)
	    		.setContent(new Intent(this,TouchTest.class)));
	    group.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				switch (checkedId) {
				case R.id.radio_button0:
					tabHost.setCurrentTabByTag(TAB_HOME);
					break;
				case R.id.radio_button1:
					tabHost.setCurrentTabByTag(TAB_MES);
					break;
				case R.id.radio_button2:
					tabHost.setCurrentTabByTag(TAB_TOUCH);
					break;

				default:
					break;
				}
			}
		});
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<TabHost android:id="@android:id/tabhost" android:layout_width="fill_parent"
	android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">
	<LinearLayout android:orientation="vertical"
		android:layout_width="fill_parent" android:layout_height="fill_parent">

		<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:visibility="gone"
			android:layout_width="fill_parent" android:layout_height="wrap_content"
			android:layout_weight="0.0" />
		<RadioGroup android:gravity="center_vertical"
			android:layout_gravity="bottom" android:orientation="horizontal"
			android:id="@+id/main_radio" android:background="@drawable/maintab_toolbar_bg"
			android:layout_width="fill_parent" android:layout_height="wrap_content">
			<RadioButton android:id="@+id/radio_button0" android:tag="radio_button0"
				android:layout_marginTop="2.0dip" android:text="@string/main_home"
				android:drawableTop="@drawable/icon_1_n" style="@style/main_tab_bottom" />
			<RadioButton android:id="@+id/radio_button1" android:tag="radio_button1"
				android:layout_marginTop="2.0dip" android:text="@string/main_message"
				android:drawableTop="@drawable/icon_2_n" style="@style/main_tab_bottom" />
			<RadioButton android:id="@+id/radio_button2" android:tag="radio_button2"
				android:layout_marginTop="2.0dip" android:text="@string/main_comment"
				android:drawableTop="@drawable/icon_3_n" style="@style/main_tab_bottom" />
		</RadioGroup>
	</LinearLayout>
</TabHost>