TabActivity的使用遇到的问题

	private TabHost tabHost;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO 需要设计该Tab的UI布局
		super.onCreate(savedInstanceState);
		tabHost = this.getTabHost();
		LayoutInflater.from(this).inflate(R.layout.al_inpatient_detail, tabHost.getTabContentView(), true);
		tabHost.setBackgroundResource(R.drawable.bg_main);
		
		// 住院诊断
		tabHost.addTab(
				tabHost.newTabSpec("One")
				.setIndicator(Constant.CENTER_INPATIENT_DIAGOSIS, getResources().getDrawable(R.drawable.center_inpatient_diagosis))
				.setContent(R.id.linear_diagnosis)
				);
		
		// 费用明细
		tabHost.addTab(
				tabHost.newTabSpec("Two")
				.setIndicator(Constant.CENTER_INPATIENT_COST, getResources().getDrawable(R.drawable.center_inpatient_cost))
				.setContent(R.id.linear_cost)
				);
		
		// 结算明细
		tabHost.addTab(
				tabHost.newTabSpec("Three")
				.setIndicator(Constant.CENTER_INPATIENT_CLEARING_FEE, getResources().getDrawable(R.drawable.center_inpatient_clearing_fee))
				.setContent(R.id.linear_clearing_fee)
				);
		
		// TODO 字体颜色
		TabWidget tabWidget = tabHost.getTabWidget();
        for (int i =0; i < tabWidget.getChildCount(); i++) {
                tabWidget.setBackgroundColor(Color.WHITE);
//                    tabWidget.getChildAt(i).getLayoutParams().height = 30;//设置tab的高度
                     TextView tv = (TextView) tabWidget.getChildAt(i).findViewById(android.R.id.title);
                    tv.setTextColor(Color.BLUE);//设置tab内字体的颜色
        }
		
		// 点击更新背景
		tabHost.setOnTabChangedListener(this);
		
		tabHost.setCurrentTab(2);
		
		// TODO 查询数据，填充UI
	}
	/**
     * 更新Tab标签的背景图
     * @param tabHost
     */
    private void updateTabBackground( TabHost tabHost) {
        for (int i = 0; i < tabHost.getTabWidget().getChildCount(); i++) {
            View view = tabHost.getTabWidget().getChildAt(i);
            if (tabHost.getCurrentTab() == i) {
                //选中后的背景
                view.setBackgroundDrawable(getResources().getDrawable(R.drawable.ic_press_click));
            } else {
                //非选择的背景
                view.setBackgroundDrawable(getResources().getDrawable(R.drawable.bg_main));
            }
        }
    }
	@Override
	public void onTabChanged(String tabId) {
		// 点击更新背景
		updateTabBackground(tabHost);
		
	}

参考：http://www.eoeandroid.com/thread-56303-1-1.html

参考：http://www.cnblogs.com/xitang/archive/2011/09/14/2176539.html