android之实现底部TabHost

先说布局文件，如下：利用android:layout_alignParentBottom="true" 实现底部显示

<?xml version="1.0" encoding="utf-8"?>

<TabHost xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@android:id/tabhost"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent">

    <RelativeLayout

        android:background="@drawable/g"

        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"

        android:layout_alignParentBottom="true">

    </TabWidget>

    <FrameLayout android:id="@android:id/tabcontent"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent">

        <RelativeLayout android:id="@+id/tabFirst"

            android:layout_width="fill_parent"

            android:layout_height="fill_parent"

            android:orientation="vertical">

        <AnalogClock

            android:id="@+id/widget31"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_centerInParent="true">

        </AnalogClock>

        </RelativeLayout>>

        <RelativeLayout android:id="@+id/tabSecond"

            android:layout_width="fill_parent"

            android:layout_height="fill_parent"

            android:orientation="vertical">

            <DigitalClock

                android:layout_centerInParent="true"

                android:layout_width="wrap_content"

                android:layout_height="wrap_content">

            </DigitalClock>

        </RelativeLayout>

    </FrameLayout>

    </RelativeLayout>

</TabHost>

 

下面是主程序代码，注释写的比较详细，这里就不在多解释了

package com.cloay;

 

import android.app.TabActivity;

import android.graphics.Color;

import android.os.Bundle;

import android.widget.TabHost;

import android.widget.TabHost.OnTabChangeListener;

import android.widget.Toast;

 

public class TabTestActivity extends TabActivity {

    TabHost tabHost;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        //获取TabHost对象

        tabHost = getTabHost();  

//        tabHost.setup();

        //新建一个newTabSpec,设置标签和图标(setIndicator),设置内容(setContent)

        tabHost.addTab(tabHost.newTabSpec("Test one").setIndicator("",getResources().getDrawable(android.R.drawable.ic_menu_call)).setContent(R.id.tabFirst));

        tabHost.addTab(tabHost.newTabSpec("Test two").setIndicator("",getResources().getDrawable(android.R.drawable.ic_menu_camera)).setContent(R.id.tabSecond));

        //设置TabHost的背景颜色

        tabHost.setBackgroundColor(Color.argb(150,22,70,150));

        //设置TabHost的背景图片资源

//      tabHost.setBackgroundResource(R.drawable.bg);

        //设置当前现实哪一个标签

        tabHost.setCurrentTab(0);   //0为标签ID

        //标签切换处理，用setOnTabChangedListener  

        tabHost.setOnTabChangedListener(new OnTabChangeListener(){

            public void onTabChanged(String tabId){

                Toast.makeText(TabTestActivity.this, "This is a Test!", Toast.LENGTH_LONG).show();

            }

        });

    }

}