try this may be it help you.
tabHost = getTabHost();
TabSpec spec_info = tabHost.newTabSpec(getString(R.string.info));
spec_info.setIndicator(getString(R.string.info), null);
Intent Intent_info = new Intent(this, RestaurantInfoActivity.class);
spec_info.setContent(Intent_info);
tabHost.addTab(spec_info);
tabHost.getTabWidget().getChildTabViewAt(0).setBackgroundDrawable(getResources().getDrawable(R.drawable.tab_selector));
xml
<TabHost
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:orientation="vertical"
android:fadingEdge="none"
android:overScrollMode="never"
>
<TabWidget
android:id="@android:id/tabs"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:tabStripEnabled="false" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
</TabHost>
selector
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- When selected, use white-->
<item android:drawable="@drawable/active_tab"
android:state_selected="true" />
<!-- When not selected, use grey -->
<item android:drawable="@drawable/in_active_tab" >
</item>