android之實現底部TabHost

先說布局檔案，如下：利用android:layout_alignParentBottom="true" 實現底部顯示

 1 <?xml version="1.0" encoding="utf-8"?> 2 <TabHost xmlns:android="http://schemas.android.com/apk/res/android" 3      android:id="@android:id/tabhost"  4      android:orientation="vertical" 5     android:layout_width="fill_parent" 6     android:layout_height="fill_parent"> 7     <RelativeLayout 8         android:background="@drawable/g" 9         android:layout_width="fill_parent"10         android:layout_height="fill_parent">11     <TabWidget android:id="@android:id/tabs"12         android:layout_width="fill_parent"13         android:layout_height="wrap_content"14         android:layout_alignParentBottom="true">15     </TabWidget>16     <FrameLayout android:id="@android:id/tabcontent"17         android:layout_width="fill_parent"18         android:layout_height="fill_parent">19         <RelativeLayout android:id="@+id/tabFirst"20             android:layout_width="fill_parent"21             android:layout_height="fill_parent"22             android:orientation="vertical">23         <AnalogClock24             android:id="@+id/widget31"25             android:layout_width="wrap_content"26             android:layout_height="wrap_content"27             android:layout_centerInParent="true">28         </AnalogClock>29         </RelativeLayout>>30         <RelativeLayout android:id="@+id/tabSecond"31             android:layout_width="fill_parent"32             android:layout_height="fill_parent"33             android:orientation="vertical">34             <DigitalClock35                 android:layout_centerInParent="true"36                 android:layout_width="wrap_content"37                 android:layout_height="wrap_content">38             </DigitalClock>39         </RelativeLayout>40     </FrameLayout>41     </RelativeLayout>42 </TabHost>

下面是主程式碼，注釋寫的比較詳細，這裡就不在多解釋了

 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         //擷取TabHost對象17         tabHost = getTabHost();   18 //        tabHost.setup();19         //建立一個newTabSpec,設定標籤和表徵圖(setIndicator),設定內容(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         //設定TabHost的背景顏色23         tabHost.setBackgroundColor(Color.argb(150,22,70,150));24         //設定TabHost的背景圖片資源25 //        tabHost.setBackgroundResource(R.drawable.bg);26         //設定當前現實哪一個標籤27         tabHost.setCurrentTab(0);   //0為標籤ID28         //標籤切換處理，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 }