tabActivity的简单实现

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需要注意tabhost，framelayout，以及tabwidget的id都是android自带的那种。
指定好的。这边tab标签卡设置为底部的

package com.nico.tab;


import android.app.TabActivity;
import android.os.Bundle;
import android.widget.TabHost;

public class TestTabMain extends TabActivity {
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.tabxml);
		TabHost tabhost = getTabHost();
		tabhost.setup();
		tabhost.addTab(tabhost.newTabSpec("tab1").setIndicator("tab1")
				.setContent(R.id.tab1));
		tabhost.addTab(tabhost.newTabSpec("tab2").setIndicator("tab2")
				.setContent(R.id.tab2));
		tabhost.addTab(tabhost.newTabSpec("tab3").setIndicator("tab3")
				.setContent(R.id.tab3));
		tabhost.addTab(tabhost.newTabSpec("tab4").setIndicator("tab4")
				.setContent(R.id.tab4));
		//设置默认选中项
		tabhost.setCurrentTab(3);
	}
}