Android中TabHost的使用

TabHostActivity.java代码：

package com.jswjtu.imageclassification.activity;

import com.jswjtu.imageclassification.R;

import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.Window;
import android.widget.RelativeLayout;
import android.widget.TabHost;
import android.widget.TextView;

@SuppressWarnings("deprecation")
public class TabHostActivity extends TabActivity {

    Intent intent;
    TabHost.TabSpec tabSpec;
    TabHost tabHost;
    int currentTabID = 0;
    int flaggingWidth;// 互动翻页所需滚动的长度是当前屏幕宽度的1/3
    GestureDetector gestureDetector
        = new GestureDetector(new TabHostTouch());

    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
         //设置无标题 
        requestWindowFeature(Window.FEATURE_NO_TITLE);  
        setContentView(R.layout.tabhost);

        Resources res = getResources();
        tabHost = getTabHost();

        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        flaggingWidth = dm.widthPixels / 3;

        //给Tab1添加自定义样式 
        RelativeLayout tabStyle1 = (RelativeLayout)LayoutInflater.from(this).inflate(R.layout.tab_style, null);  
        TextView text1 = (TextView)tabStyle1.findViewById(R.id.tab_label);  
        text1.setText("相册");  

        //给Tab2添加自定义样式 
        RelativeLayout tabStyle2 = (RelativeLayout)LayoutInflater.from(this).inflate(R.layout.tab_style, null);  
        TextView text2 = (TextView)tabStyle2.findViewById(R.id.tab_label);  
        text2.setText("视频");  

        intent = new Intent(TabHostActivity.this,ImageActivity.class);//指定tab页面的Activity
        tabSpec = tabHost.newTabSpec("image"); // 创建一个新的标签页，标记为“image”
        tabSpec.setIndicator(tabStyle1);// 设置tab页的名称和图像表示
        tabSpec.setContent(intent);// 设置此tab跳转到的Activity
        tabHost.addTab(tabSpec);// 将此tab加入到tabHost

        intent = new Intent(TabHostActivity.this,VideoActivity.class);
        tabSpec = tabHost.newTabSpec("video");
        tabSpec.setIndicator(tabStyle2);
        tabSpec.setContent(intent);
        tabHost.addTab(tabSpec);

        tabHost.setCurrentTab(0);// 设置当期的tab页，从0开始偏移
    }
    @Override  
    public boolean dispatchTouchEvent(MotionEvent event) {  

        if (gestureDetector.onTouchEvent(event)) {  
            event.setAction(MotionEvent.ACTION_CANCEL);  
        }  
        return super.dispatchTouchEvent(event);  

    } 
    private class TabHostTouch extends SimpleOnGestureListener {  
        @Override  
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,  
                float velocityY) {  
            if (Math.abs(e1.getX() - e2.getX()) > Math.abs(e1.getY()  
                    - e2.getY())  
                    && (e1.getX() - e2.getX() <= (-flaggingWidth) || e1.getX()  
                            - e2.getX() >= flaggingWidth)) {  
                currentTabID = tabHost.getCurrentTab();
                if (e1.getX() - e2.getX() <= (-flaggingWidth)) {  
                    if (tabHost.getCurrentTab() == 1) {  
                        currentTabID = 0;
                    }  
                    tabHost.setCurrentTab(currentTabID);  
                    return true;  
                } else if (e1.getX() - e2.getX() >= flaggingWidth) {  
                    if (tabHost.getCurrentTab() == 0) {  
                        currentTabID = 1;
                    }  
                    tabHost.setCurrentTab(currentTabID);  
                    return true;  
                }  
            }  
            return false;  
        }  
    }  
}

tabhost.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" android:layout_width="match_parent" android:layout_height="match_parent" >
 <!-- 注意这里，id的设置方法跟普通控件不同，必须为tabhost -->

    <LinearLayout  android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" >

        <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" />
    </LinearLayout>

</TabHost>

tab_style.xml代码：

<?xml version="1.0" encoding="UTF-8"?>  
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingLeft="5dip" android:paddingRight="5dip" android:background="#67e9bb" >    

    <TextView android:id="@+id/tab_label" android:layout_width="fill_parent" android:layout_height="40dp" android:gravity="center" android:textColor="#000000" android:textStyle="bold" android:background="@drawable/tab" />   
</RelativeLayout>  

tab.xml代码：

<?xml version="1.0" encoding="UTF-8"?>  
<selector xmlns:android = "http://schemas.android.com/apk/res/android">     

         <item android:state_selected = "true" android:drawable="@drawable/tab_sel_ture" />
         <item android:state_selected = "false" android:drawable="@drawable/tab_sel_false" />      
</selector>  

即可；