使用TabHost实现卡片选项菜单实例

TabHost是一个装载选项卡窗口的容器，实现分模块显示的效果。像新浪微博客户端、微信客户端都是使用tabehost组件来开发的。

TabHost的组成：

|---TabWidget：实现标签栏，可供用户选择的标签集合;

|---FrameLayout：实现显示内容的帧布局.

TabHost有两种实现方式：

一、在布局文件中定义TabHost

               1、在配置文件中使用TabHost标签定义布局;

                2、TabHost 的id 定义为：tabhost;

                3、TabWidget 的id 定义为：tabs;

                4、FrameLayout 的id 定义为：tabcontent.

        二、继承TabActivity类：

                在Activity中通过getTabHost() 方法取得TabHost.

       这两种方法实现的效果是一样的，但是后者不需要定义TabHost的布局文件，使用起来比较方便，推荐大家使用这种方式。

先来看看实现的效果吧：

下面给出源代码：

第一种方式(使用xml布局)：

工程目录结构

main.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" >

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

        </LinearLayout>
    </TabHost>
</LinearLayout>

<?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" >

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

home.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="fill_parent"
     android:background="#0000FF"
     android:id="@+id/home"
     android:orientation="vertical">

    <TextView
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="@string/home"
    />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	 android:layout_width="match_parent"
	 android:layout_height="fill_parent"
	 android:background="#0000FF"
	 android:id="@+id/home"
	 android:orientation="vertical">
    
    <TextView
	     android:layout_width="fill_parent"
	     android:layout_height="wrap_content"
	     android:text="@string/home"
    />
    
</LinearLayout>

其他3个布局文件跟home.xml一样，只是TextView的内容不同，这里就不给出代码了。

TabHostActivity.java

package cn.bdqn.tabhost;

import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;

public class TabHostActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //取得TabHost
        TabHost tabhost = (TabHost) findViewById(R.id.tablehost);
        tabhost.setup();
        LayoutInflater inflater = LayoutInflater.from(this);
        //把配置文件转换为显示TabHost内容的FrameLayout中的层级
        inflater.inflate(R.layout.home, tabhost.getTabContentView());
        inflater.inflate(R.layout.comment, tabhost.getTabContentView());
        inflater.inflate(R.layout.save, tabhost.getTabContentView());
        inflater.inflate(R.layout.more, tabhost.getTabContentView());
        //设置HOME标签
        TabSpec spec1 = tabhost.newTabSpec("HOME").setIndicator("HOME");
        //设置HOME模块显示内容
        spec1.setContent(R.id.home);
        tabhost.addTab(spec1);

        TabSpec spec2 = tabhost.newTabSpec("COMMENT").setIndicator("COMMENT");
        spec2.setContent(R.id.comment);
        tabhost.addTab(spec2);

        TabSpec spec3 = tabhost.newTabSpec("SAVE").setIndicator("SAVE");
        spec3.setContent(R.id.save);
        tabhost.addTab(spec3);

        TabSpec spec4 = tabhost.newTabSpec("MORE").setIndicator("MORE");
        spec4.setContent(R.id.more);
        tabhost.addTab(spec4);
    }
}

package cn.bdqn.tabhost;

import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;

public class TabHostActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //取得TabHost
        TabHost tabhost = (TabHost) findViewById(R.id.tablehost);
        tabhost.setup();
        LayoutInflater inflater = LayoutInflater.from(this);
        //把配置文件转换为显示TabHost内容的FrameLayout中的层级
        inflater.inflate(R.layout.home, tabhost.getTabContentView());
        inflater.inflate(R.layout.comment, tabhost.getTabContentView());
        inflater.inflate(R.layout.save, tabhost.getTabContentView());
        inflater.inflate(R.layout.more, tabhost.getTabContentView());
        //设置HOME标签
        TabSpec spec1 = tabhost.newTabSpec("HOME").setIndicator("HOME");
        //设置HOME模块显示内容
        spec1.setContent(R.id.home);
        tabhost.addTab(spec1);
        
        TabSpec spec2 = tabhost.newTabSpec("COMMENT").setIndicator("COMMENT");
        spec2.setContent(R.id.comment);
        tabhost.addTab(spec2);
        
        TabSpec spec3 = tabhost.newTabSpec("SAVE").setIndicator("SAVE");
        spec3.setContent(R.id.save);
        tabhost.addTab(spec3);
        
        TabSpec spec4 = tabhost.newTabSpec("MORE").setIndicator("MORE");
        spec4.setContent(R.id.more);
        tabhost.addTab(spec4);
    }
}

第二种方式(继承TabActivity)：

工程目录结构

home.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"
    android:background="@drawable/a">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Hello world! HomeActivty" />

</LinearLayout>

<?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"
    android:background="@drawable/a">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Hello world! HomeActivty" />

</LinearLayout>

其他3个布局文件跟这个一样。

MainActivity.java

package com.tablehost.activity;

import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.SpeechRecognizer;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;

public class MainActivity extends TabActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //获取TabHost组件
        TabHost tabHost = getTabHost();
        //新建一个标签页
        TabSpec tabSpec1 = (TabSpec)tabHost.newTabSpec("HOME").setIndicator("HOME");
        //给标签页设置内容
        tabSpec1.setContent(new Intent(MainActivity.this,HomeActivity.class));
        //把标签页添加到TabHost当中去
        tabHost.addTab(tabSpec1);

        TabSpec tabSpec2 = (TabSpec)tabHost.newTabSpec("COMMENT").setIndicator("COMMENT");
        tabSpec2.setContent(new Intent(MainActivity.this,CommentActivity.class));
        tabHost.addTab(tabSpec2);

        TabSpec tabSpec3 = (TabSpec)tabHost.newTabSpec("SAVE").setIndicator("SAVE");
        tabSpec3.setContent(new Intent(MainActivity.this,SaveActivity.class));
        tabHost.addTab(tabSpec3);

        TabSpec tabSpec4 = (TabSpec)tabHost.newTabSpec("MORE").setIndicator("MORE");
        tabSpec4.setContent(new Intent(MainActivity.this,MoreActivity.class));
        tabHost.addTab(tabSpec4);
    }
}

package com.tablehost.activity;

import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.speech.SpeechRecognizer;
import android.widget.TabHost;
import android.widget.TabHost.TabSpec;

public class MainActivity extends TabActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //获取TabHost组件
        TabHost tabHost = getTabHost();
        //新建一个标签页
        TabSpec tabSpec1 = (TabSpec)tabHost.newTabSpec("HOME").setIndicator("HOME");
        //给标签页设置内容
        tabSpec1.setContent(new Intent(MainActivity.this,HomeActivity.class));
        //把标签页添加到TabHost当中去
        tabHost.addTab(tabSpec1);
        
        TabSpec tabSpec2 = (TabSpec)tabHost.newTabSpec("COMMENT").setIndicator("COMMENT");
        tabSpec2.setContent(new Intent(MainActivity.this,CommentActivity.class));
        tabHost.addTab(tabSpec2);
        
        TabSpec tabSpec3 = (TabSpec)tabHost.newTabSpec("SAVE").setIndicator("SAVE");
        tabSpec3.setContent(new Intent(MainActivity.this,SaveActivity.class));
        tabHost.addTab(tabSpec3);
        
        TabSpec tabSpec4 = (TabSpec)tabHost.newTabSpec("MORE").setIndicator("MORE");
        tabSpec4.setContent(new Intent(MainActivity.this,MoreActivity.class));
        tabHost.addTab(tabSpec4);
    }
}

HomeActivity.java

package com.tablehost.activity;

import android.app.Activity;
import android.os.Bundle;

public class HomeActivity extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home);
    }

}

package com.tablehost.activity;

import android.app.Activity;
import android.os.Bundle;

public class HomeActivity extends Activity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.home);
	}
	
}

其他三个CommentActivity.java ，SaveActivity.java，MoreActivity.java 跟 HomeActivity.java 差不多，这里不给出代码了。

最后在AndroidManifest.xml对Activity进行声明：

<activity android:name=".HomeActivity" />
        <activity android:name=".CommentActivity" />
        <activity android:name=".SaveActivity" />
        <activity android:name=".MoreActivity" />