先说布局文件，如下：利用android:layout_alignParentBottom="true" 实现底部显示

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下面是主程序代码，注释写的比较详细，这里就不在多解释了

1 package com.cloay; 2  3 import android.app.TabActivity; 4 import android.graphics.Color; 5 import android.os.Bundle; 6 import android.widget.TabHost; 7 import android.widget.TabHost.OnTabChangeListener; 8 import android.widget.Toast; 9 10 public class TabTestActivity extends TabActivity {11     TabHost tabHost;12     @Override13     public void onCreate(Bundle savedInstanceState) {14         super.onCreate(savedInstanceState);15         setContentView(R.layout.main);16         //获取TabHost对象17         tabHost = getTabHost();   18 //        tabHost.setup();19         //新建一个newTabSpec,设置标签和图标(setIndicator),设置内容(setContent)20         tabHost.addTab(tabHost.newTabSpec("Test one").setIndicator("",getResources().getDrawable(android.R.drawable.ic_menu_call)).setContent(R.id.tabFirst));21         tabHost.addTab(tabHost.newTabSpec("Test two").setIndicator("",getResources().getDrawable(android.R.drawable.ic_menu_camera)).setContent(R.id.tabSecond));22         //设置TabHost的背景颜色23         tabHost.setBackgroundColor(Color.argb(150,22,70,150));24         //设置TabHost的背景图片资源25 //        tabHost.setBackgroundResource(R.drawable.bg);26         //设置当前现实哪一个标签27         tabHost.setCurrentTab(0);   //0为标签ID28         //标签切换处理，用setOnTabChangedListener    29         tabHost.setOnTabChangedListener(new OnTabChangeListener(){30             public void onTabChanged(String tabId){31                 Toast.makeText(TabTestActivity.this, "This is a Test!", Toast.LENGTH_LONG).show();32             }33         });34     }35 }