package lianxi;import com.example.jichu_lianxi.R;import android.app.TabActivity;import android.content.Intent;import android.content.res.Resources;import android.os.Bundle;import android.widget.TabHost;public class TobHost_lianxi extends TabActivity{  @Override  protected void onCreate(Bundle savedInstanceState) {    // TODO Auto-generated method stub    super.onCreate(savedInstanceState);    //獲取當前Activity的標簽，該方法的實現已經執行了setContentView(com.android.internal.R.layout.tab_content);    Resources resources = getResources();    TabHost tabHost = getTabHost();    TabHost.TabSpec spec;    /*     * 對方法的解釋：     * 1.   newTabSpec("artist")創建一個標簽項，其中artist為它的標簽標識符     * 2.   setIndicator("標簽1", resources.getDrawable(R.drawable.bulb_off))     *      顯示文本以及標簽上的圖標(該圖標不是一個圖片，而是一個xml文件)     */    //添加第一個標簽    Intent intent = new Intent(TobHost_lianxi.this,KeyOnclick.class);    spec = tabHost.newTabSpec("keyonclick").setIndicator("標簽1", resources.getDrawable(R.drawable.bulb_off)).setContent(intent);    tabHost.addTab(spec);//將標簽添加到標簽項中    //添加第二個標簽    Intent intent2 = new Intent(TobHost_lianxi.this,List_lianxi.class);    spec = tabHost.newTabSpec("list").setIndicator("標簽2",resources.getDrawable(R.drawable.bulb_off)).setContent(intent2);    tabHost.addTab(spec);    //添加第三個標簽    Intent intent3 = new Intent(TobHost_lianxi.this,ToggleButton_lianxi.class);    spec = tabHost.newTabSpec("togglebutton").setIndicator("標簽3",resources.getDrawable(R.drawable.bulb_off)).setContent(intent3);    tabHost.addTab(spec);    //添加第四個標簽    Intent intent4 = new Intent(TobHost_lianxi.this,ToggleButton_lianxi.class);    spec = tabHost.newTabSpec("toggle").setIndicator("標簽4",resources.getDrawable(R.drawable.bulb_off)).setContent(intent4);    tabHost.addTab(spec);    //設置第一次打開的默認顯示的標簽,參數與 .newTabSpec的參數匹配    //tabHost.setCurrentTabByTag("toggle");    //設置第一次打開的默認顯示的標簽,參數代表其添加到標簽中的順序,位置從0開始    tabHost.setCurrentTab(1);  }}

<application    android:allowBackup="true"    android:icon="@drawable/ic_launcher"    android:label="@string/app_name"    android:theme="@style/AppTheme" >    <activity android:name="lianxi.Mainactivity">      <intent-filter        >        <action android:name="android.intent.action.MAIN"/>        <category android:name="android.intent.category.LAUNCHER" />      </intent-filter>    </activity>    <activity android:name="lianxi.NewActivity"></activity>    <activity android:name="lianxi.AlertDialog_lianxi"></activity>    <activity android:name="lianxi.Notification_lianxi"></activity>    <activity android:name="lianxi.KeyOnclick"></activity>    <activity android:name="lianxi.List_lianxi"></activity>    <activity android:name="lianxi.ToggleButton_lianxi"></activity>    <activity android:name="lianxi.TobHost_lianxi"></activity></application>