切换卡

<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"
    >
 <LinearLayout
    android:orientation="vertical"
       android:layout_width="fill_parent"
        android:layout_height="fill_parent"
     >
     <TabWidget
         android:id="@android:id/tabs"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         >
      <FrameLayout
          android:id="@android:id/tabcontent"
          android:layout_width="fill_parent"
          android:layout_height="wrap_content"
          >
          <TextView
              android:id="@+id/textview1"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:text="this is a tab"
              />
          <TextView
              android:id="@+id/textview2"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:text="this is anther tab"
              />
          <TextView
              android:id="@+id/textview3"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
              android:text="this is a third tab"
              />
         
      </FrameLayout>
        
        
     </TabWidget>

  
</LinearLayout>   
</TabHost>

 

package com.example.qiehuan;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.TabActivity;
import android.content.DialogInterface;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;

public class QieHuanActivity extends TabActivity {
 //声明TabHost对象
    private TabHost mTabHost;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.qie_huan);
        //取得TabHost对象
        mTabHost = this.getTabHost();
        //为TabHost添加标签
        //新建一个newTabSpec(new TabSpec)
        //设置器标签和图标(setIndicator)
        //设置内容
        mTabHost.addTab(mTabHost.newTabSpec("tab_test").setIndicator("TAB 1",getResources().getDrawable(R.drawable.sun)).setContent(R.id.textview1));
        mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("TAB 2",getResources().getDrawable(R.drawable.cloud)).setContent(R.id.textview2));
        mTabHost.addTab(mTabHost.newTabSpec("tab_test3").setIndicator("TAB 3",getResources().getDrawable(R.drawable.rain)).setContent(R.id.textview3));
       
        //设置TabHost的背景颜色
        mTabHost.setBackgroundColor(Color.argb(150, 22, 70, 150));
       
        //设置当前显示哪一个标签
        mTabHost.setCurrentTab(1);
       
        //标签切换事件处理
        mTabHost.setOnTabChangedListener(new OnTabChangeListener() {
   @Override
   public void onTabChanged(String tabId) {
    // TODO Auto-generated method stub
    new AlertDialog.Builder(QieHuanActivity.this).setTitle("提示").setMessage("当前选中:"+tabId+"标签")
    .setPositiveButton("确定", new DialogInterface.OnClickListener() {
     @Override
     public void onClick(DialogInterface dialog, int which) {
      // TODO Auto-generated method stub
      dialog.cancel();
     }
    }).create().show();
   }
  });
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.qie_huan, menu);
        return true;
    }
}