自定义tabhost实现

tabhost在网上随便找一下很多，但是真正全的东西还是不多，这里总结下我的tabhost的实现的全过程。

1、定义tabhost的xml文件

<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:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
        
         <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="0.0dip"
            android:layout_weight="1.0" />
         
          <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="0.0"
            android:visibility="gone"
            android:divider="@drawable/businessopp_line" />
          
          <RadioGroup
            android:id="@+id/tabhost_radio"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom"
            android:gravity="center_vertical"
            android:orientation="horizontal" >

            <RadioButton
                android:id="@+id/radio_button1"
                style="@style/tab_style"
                android:background="@drawable/style_tabhost_btn1"
                android:tag="radio_button0" />

            <RadioButton
                android:id="@+id/radio_button2"
                style="@style/tab_style"
                android:background="@drawable/style_tabhost_btn2"
                android:tag="radio_button1"/>

            <RadioButton
                android:id="@+id/radio_button3"
                style="@style/tab_style"
                android:background="@drawable/style_tabhost_btn3"
                android:tag="radio_button2" />

            <RadioButton
                android:id="@+id/radio_button4"
                style="@style/tab_style"
                android:background="@drawable/style_tabhost_btn4"
                android:tag="radio_button3" />

            <RadioButton
                android:id="@+id/radio_button5"
                style="@style/tab_style"
                android:background="@drawable/style_tabhost_btn5"
                android:tag="radio_button4" />
            
        </RadioGroup>
        
    </LinearLayout>

</TabHost>

特别注意要加几个id：  tabhost中的android:id="@android :id/tabhost"  FramFrameLayout中的android:id="@android :id/tabcontent"  TabWidget中的android:id="@android :id/tabs"一定要添加，否则报错。还有个地方值得注意的，就是FramFrameLayout中的android:layout_weight="1.0"和TabWidget中的 android:layout_weight="0.0"用来控制tabhost组件显示在屏幕最下方。

其中style/tab_style

<style name="tab_style">
        <item name="android:button">@null</item>  
        <item name="android:ellipsize">marquee</item>
        <item name="android:gravity">center_horizontal</item>  
        <item name="android:layout_width">wrap_content</item>
        <item name="android:layout_height">wrap_content</item>
        <item name="android:layout_weight">1.0</item>
    </style>

 

2、写一个继承TabActivity的类,要写在onstart方法里

public class TabHostActivity extends TabActivity {
	
	private TabHost tabHost;
	public static final String TAB_ITEM_1 = "tabItem1";
	public static final String TAB_ITEM_2 = "tabItem2";
	public static final String TAB_ITEM_3 = "tabItem3";
	public static final String TAB_ITEM_4 = "tabItem4";
	public static final String TAB_ITEM_5 = "tabItem5";
	private RadioGroup radiogroup;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_tabhost);
		WelcomeActivity.myActivitiesList.add(this);
		
		radiogroup = (RadioGroup) findViewById(R.id.tabhost_radio);
		radiogroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				switch (checkedId) {
				case R.id.radio_button1:
					tabHost.setCurrentTabByTag(TAB_ITEM_1);
					break;
				case R.id.radio_button2:
					tabHost.setCurrentTabByTag(TAB_ITEM_2);
					break;
				case R.id.radio_button3:
					tabHost.setCurrentTabByTag(TAB_ITEM_3);
					break;
				case R.id.radio_button4:
					tabHost.setCurrentTabByTag(TAB_ITEM_4);
					break;
				case R.id.radio_button5:
					tabHost.setCurrentTabByTag(TAB_ITEM_5);
					break;
				default:
					break;
				}
			}
		});
		tabHost = getTabHost();
		
	}
	@Override
	protected void onStart() {
		super.onStart();
		TabSpec tab1b = tabHost.newTabSpec(TAB_ITEM_1);
		TabSpec tab2b = tabHost.newTabSpec(TAB_ITEM_2);
		TabSpec tab3b = tabHost.newTabSpec(TAB_ITEM_3);
		TabSpec tab4b = tabHost.newTabSpec(TAB_ITEM_4);
		TabSpec tab5b = tabHost.newTabSpec(TAB_ITEM_5);
		
		tab1b.setIndicator(TAB_ITEM_1).setContent(new Intent(this, Test.class));
		tab2b.setIndicator(TAB_ITEM_2).setContent(new Intent(this, Test.class));
		tab3b.setIndicator(TAB_ITEM_3).setContent(new Intent(this, Test.class));
		tab4b.setIndicator(TAB_ITEM_4).setContent(new Intent(this, Test.class));
		tab5b.setIndicator(TAB_ITEM_5).setContent(new Intent(this, Test.class));
		
		tabHost.addTab(tab1b);
		tabHost.addTab(tab2b);
		tabHost.addTab(tab3b);
		tabHost.addTab(tab4b);
		tabHost.addTab(tab5b);
	}
}

完成，一个自定义的tabhost完成