TabHost与Activity

1、mainactivity 的layout:

<?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="fill_parent"
    android:layout_height="fill_parent" >
    <LinearLayout android:orientation="vertical"  
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent">
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_weight="1" >
        </FrameLayout>

	    <LinearLayout 
	        android:layout_width="fill_parent" 
	        android:layout_height="wrap_content"
	        android:orientation="vertical" >
		    <TabWidget 
		        android:id="@android:id/tabs"
		        android:layout_width="fill_parent"
		    	android:layout_height="wrap_content" >
		    </TabWidget>
		    </LinearLayout>
		   
	</LinearLayout>
</TabHost>

2、selector.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <View
        android:id="@+id/tabIndicator"
        android:layout_width="fill_parent"
        android:layout_height="3dp"
        android:background="#a70000" />

    <View
        android:id="@+id/tabDivider"
        android:layout_width="fill_parent"
        android:layout_height="1dp"
        android:background="#2b2e39" />

    <LinearLayout
        android:id="@+id/tabView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical"
        android:padding="7dp" >

        <ImageView
            android:id="@+id/tab_iv_icon"
            android:layout_width="30px"
            android:layout_height="30px"
            android:scaleType="fitCenter"
            android:src="@drawable/ic_launcher" />

         <TextView
             android:id="@+id/tab_tv_text"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:textSize="15.0sp" />

    </LinearLayout>

</LinearLayout>

3、MainActivity

package com.example.tabhostdemo;

import android.os.Bundle;
import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;

public class MainActivity extends TabActivity{
	private TabHost tabHost;
	private TabWidget tabWidget;
	private int preTabId = 0;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		tabHost = this.getTabHost();
		tabWidget = this.getTabWidget();
		tabHost.setFocusable(true);
		
		
		tabHost.setOnTabChangedListener(new OnTabChangeListener() {
			@Override
			public void onTabChanged(String tabId) {
				// TODO Auto-generated method stub
				int tId = Integer.parseInt(tabId);
				if(tId != preTabId)
				{
					setTabBg(tId, true);
					setTabBg(preTabId, false);
					preTabId = tId;
				}
			}
		});
		
		Intent intent = new Intent(this, Activity1.class);
		tabHost.addTab(buildTabSpec("0", "标签1", intent));
		intent = new Intent(this, Activity2.class);
		tabHost.addTab(buildTabSpec("1", "标签2", intent));
		intent = new Intent(this, Activity3.class);
		tabHost.addTab(buildTabSpec("2", "标签3", intent));
		intent = new Intent(this, Activity4.class);
		tabHost.addTab(buildTabSpec("3", "标签4", intent));
	}
	
	
	private TabSpec buildTabSpec(String tabId, String tag1, Intent intent) {
		try {
			View view = View.inflate(this, R.layout.selector, null);
			((TextView) view.findViewById(R.id.tab_tv_text)).setText(tag1);
			
			if(tabId.equals("0")){
				view.findViewById(R.id.tabIndicator).setVisibility(View.VISIBLE);
				view.findViewById(R.id.tabDivider).setVisibility(View.INVISIBLE);
			} else{
				view.findViewById(R.id.tabIndicator).setVisibility(View.INVISIBLE);
				view.findViewById(R.id.tabDivider).setVisibility(View.VISIBLE);
			}
			return tabHost.newTabSpec(tabId).setIndicator(view).setContent(intent);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	   private void setTabBg(int tabId, boolean isSelected){
	    	System.out.println("tabId:" + tabId);
	    	View myTabView = tabWidget.getChildTabViewAt(tabId);
			View tabIndicator = myTabView.findViewById(R.id.tabIndicator);
			View tabDivider = myTabView.findViewById(R.id.tabDivider);
			View tabView = myTabView.findViewById(R.id.tabView);
			if(isSelected){
				tabIndicator.setVisibility(View.VISIBLE);
				tabDivider.setVisibility(View.INVISIBLE);
				tabView.setBackgroundColor(0x14161d);
			} else{
				tabIndicator.setVisibility(View.INVISIBLE);
				tabDivider.setVisibility(View.VISIBLE);
				tabView.setBackgroundColor(0x272c39);
			}
	    }
}

最后

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