自定义底部tab

   public class MainActivity extends TabActivity implements
		OnCheckedChangeListener {
	private RadioGroup mainTab;
	private TabHost tabhost;
	private Intent iHome;
	private Intent iNews;
	private Intent iInfo;
	private RadioButton  radio_button1,radio_button0,radio_button2;
	private String value=null;

	@Override
	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);
		setContentView(R.layout.tab);
		value=getIntent().getStringExtra("value");
		mainTab = (RadioGroup) findViewById(R.id.main_tab);
		radio_button1=(RadioButton)findViewById(R.id.radio_button1);
		radio_button0=(RadioButton)findViewById(R.id.radio_button0);
		radio_button2=(RadioButton)findViewById(R.id.radio_button2);
		mainTab.setOnCheckedChangeListener(this);
		tabhost = getTabHost();
		init();

	}

	@SuppressLint("NewApi")
	@Override
	public void onCheckedChanged(RadioGroup group, int checkedId) {
		switch (checkedId) {
		case R.id.radio_button0: //账单
			 tabhost.setCurrentTab(0);
			 Drawable drawable1=this.getResources().getDrawable(R.drawable.oneo);
			 radio_button0.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable1,null,null);
			 Drawable drawable11=this.getResources().getDrawable(R.drawable.aaa);
			 radio_button1.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable11,null,null);
			 Drawable drawable111=this.getResources().getDrawable(R.drawable.cccc);
			 radio_button2.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable111,null,null);
		    break;
		case R.id.radio_button1://信息
			 tabhost.setCurrentTab(1);
			 Drawable drawable0=this.getResources().getDrawable(R.drawable.two);
			 radio_button1.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable0,null,null);
			 Drawable drawable00=this.getResources().getDrawable(R.drawable.bbb);
			 radio_button0.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable00,null,null);

			 Drawable drawable000=this.getResources().getDrawable(R.drawable.cccc);
			 radio_button2.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable000,null,null);

			 break;
		case R.id.radio_button2://彩神岛
			 tabhost.setCurrentTab(2);
			 Drawable drawable2=this.getResources().getDrawable(R.drawable.threet);
			 radio_button2.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable2,null,null);
			 Drawable drawable22=this.getResources().getDrawable(R.drawable.aaa);
			 radio_button1.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable22,null,null);
			 Drawable drawable333=this.getResources().getDrawable(R.drawable.bbb);
			 radio_button0.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable333,null,null);

			break;

		}

	}

	@SuppressLint("NewApi")
	public void init() {
	//初始化点击图标，跳转的接口
		iNews = new Intent(this, BillActivity.class);
		iNews.putExtra("value", "1");
		tabhost.addTab(tabhost
				.newTabSpec("iNews")
				.setIndicator(getResources().getString(R.string.main_bill),
						getResources().getDrawable(R.drawable.bbb))
				.setContent(iNews));
		iHome = new Intent(this, MessageActivity.class);
		iHome.putExtra("value", "1");
		tabhost.addTab(tabhost
				.newTabSpec("iHome")
				.setIndicator(getResources().getString(R.string.main_msg),
						getResources().getDrawable(R.drawable.aaa))
				.setContent(iHome));
		iInfo = new Intent(this, SettingActivity.class);
		iInfo.putExtra("value", "1");
		tabhost.addTab(tabhost
				.newTabSpec("iInfo")
				.setIndicator(getResources().getString(R.string.main_setting),
						getResources().getDrawable(R.drawable.cccc))
				.setContent(iInfo));
		Log.v("tag", "value:"+value);
		if(value.equals("")||value.equals(null)||value.equals("1")){
		 tabhost.setCurrentTab(0);
		} if(value.equals("2set")){
			tabhost.setCurrentTab(2);
			 Drawable drawable2=this.getResources().getDrawable(R.drawable.threet);
			 radio_button2.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable2,null,null);
			 Drawable drawable22=this.getResources().getDrawable(R.drawable.aaa);
			 radio_button1.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable22,null,null);
			 Drawable drawable333=this.getResources().getDrawable(R.drawable.bbb);
			 radio_button0.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable333,null,null);
		}if(value.equals("2msg")){
			tabhost.setCurrentTab(1);
			 Drawable drawable0=this.getResources().getDrawable(R.drawable.two);
			 radio_button1.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable0,null,null);
			 Drawable drawable00=this.getResources().getDrawable(R.drawable.bbb);
			 radio_button0.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable00,null,null);
			 Drawable drawable000=this.getResources().getDrawable(R.drawable.cccc);
			 radio_button2.setCompoundDrawablesRelativeWithIntrinsicBounds(null,drawable000,null,null);

		}
	}

　　xml中：

<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"
    android:background="@color/white" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        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" />

        <TextView
            android:id="@+id/line"
            android:layout_width="fill_parent"
            android:layout_height="1px"
            android:background="@color/black" />

        <RadioGroup
            android:id="@+id/main_tab"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:background="@color/white"
            android:gravity="center_vertical"
            android:orientation="horizontal" >

            <RadioButton
                android:id="@+id/radio_button0"
                style="@style/main_tab_bottom"
                android:layout_marginTop="0.0dip"
                android:drawableTop="@drawable/oneo"
                android:text="@string/main_bill" />

            <RadioButton
                android:id="@+id/radio_button1"
                style="@style/main_tab_bottom"
                android:layout_marginTop="0.0dip"
                android:drawableTop="@drawable/aaa"
                android:text="@string/main_msg" />

            <RadioButton
                android:id="@+id/radio_button2"
                style="@style/main_tab_bottom"
                android:layout_marginTop="0.0dip"
                android:drawableTop="@drawable/cccc"
                android:text="@string/main_setting" />
        </RadioGroup>
    </LinearLayout>

</TabHost>

xml中的style:

<style name="main_tab_bottom">
        <item name="android:textSize">@dimen/bottom_tab_font_size</item>
        <item name="android:textColor">@color/black</item>
        <item name="android:ellipsize">marquee</item>
        <item name="android:gravity">center_horizontal</item>
        <item name="android:background">@color/white</item>
        <item name="android:paddingTop">@dimen/bottom_tab_padding_up</item>
        <item name="android:paddingBottom">@dimen/bottom_tab_padding_up</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:singleLine">true</item>
        <item name="android:drawablePadding">@dimen/bottom_tab_padding_drawable</item>
        <item name="android:layout_weight">1.0</item>
    </style>

效果如下：