Tabhost最纯净的实现方式

有时候常常使用别人用Tabhost+其他的实现demo。单纯利用Tabhost该怎样使用呢？

以下看样例：

public class MainActivity extends TabActivity {

	public TabHost tabHost;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		// 获取对象

		tabHost = getTabHost();

		tabHost.addTab(tabHost.newTabSpec("index").setIndicator("实时新闻")

				.setContent(new Intent(this, IndexActivity.class)));

		tabHost.addTab(tabHost.newTabSpec("center").setIndicator("我的空间")

				.setContent(new Intent(this, MiddleActivity.class)));

		tabHost.addTab(tabHost.newTabSpec("self").setIndicator("设置")

				.setContent(new Intent(this, LastActivity.class)));

		// 指定的当前的tab

		// 通过索引指定 索引从0開始

		// 即一開始要显示的是哪一页

		tabHost.setCurrentTab(0); // 从零開始

	}

	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		// Inflate the menu; this adds items to the action bar if it is present.

		getMenuInflater().inflate(R.menu.main, menu);

		return true;

	}

}

二、效果图

（2）Tabhost选项卡置于底部的样例

採用LinearLayout布局。设置Weight属性就能够将选项卡位于底部

1、xml布局文件

<?

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

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

    android:id="@+id/tabhost"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="@android:color/white"

    android:orientation="vertical" >

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:orientation="vertical" >

        <FrameLayout

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

            android:layout_width="fill_parent"

            android:layout_height="0dip"

            android:layout_weight="1.0" >

        </FrameLayout>

        <TabWidget

            android:id="@android:id/tabs"

            android:layout_width="match_parent"

            android:layout_height="wrap_content" >

        </TabWidget>

    </LinearLayout>

</TabHost>

2、MainActivity

public class MainActivity extends ActivityGroup

{

    private TabHost mTabHost;

    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        initTabs();

    }

    private void initTabs()

    {

        mTabHost = (TabHost) findViewById(R.id.tabhost);

        mTabHost.setup(this.getLocalActivityManager());

        Intent intent = new Intent(this, HomepageActivity.class);

        mTabHost.addTab(mTabHost.newTabSpec("Tab1")

                .setIndicator(getString(R.string.homepage_indicator), getResources().getDrawable(R.drawable.homepage_indicator_selector))

                .setContent(intent));

        intent = new Intent(this, BillboardActivity.class);

        mTabHost.addTab(mTabHost.newTabSpec("Tab2")

                .setIndicator(getString(R.string.billboard_indicator), getResources().getDrawable(R.drawable.billboard_indicator_selector))

                .setContent(intent));

        intent = new Intent(this, MyLotteryActivity.class);

        mTabHost.addTab(mTabHost.newTabSpec("Tab3")

                .setIndicator(getString(R.string.mylottery_indicator), getResources().getDrawable(R.drawable.mylottery_indicator_selector))

                .setContent(intent));

        intent = new Intent(this, MoreActivity.class);

        mTabHost.addTab(mTabHost.newTabSpec("Tab4")

                .setIndicator(getString(R.string.more_indicator), getResources().getDrawable(R.drawable.more_indicator_selector))

                .setContent(intent));

    }

}

3、效果图