根据FragmentTabhost新建导航条

package com.example.lenovo.learnandroiddesign;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.widget.TabHost;

public class FragmentNestingTabsActivity extends FragmentActivity {

    FragmentTabHost mTabHost;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

       try {

           setContentView(R.layout.activity_fragment_nesting_tabs);
           mTabHost=(FragmentTabHost) this.findViewById(R.id.tabhost);
           mTabHost.setup(this, getSupportFragmentManager(), R.id.realcontent);

           mTabHost.addTab(mTabHost.newTabSpec("menus").setIndicator("Menus"),
                  TestFragment.class, null);
           mTabHost.addTab(mTabHost.newTabSpec("contacts").setIndicator("Contacts"),
                   TestFragment.class, null);
           mTabHost.addTab(mTabHost.newTabSpec("stack").setIndicator("Stack"),
                   TestFragment.class, null);
           mTabHost.addTab(mTabHost.newTabSpec("tabs").setIndicator("Tabs"),
                   TestFragment.class, null);
       }catch (Exception ex)
       {
           ex.printStackTrace();
       }


    }
}
需要严重注意的是：
1.必须在fragmenthost的下级标签定义，id为tabcontent的framelayout的标签
<android.support.v4.app.FragmentTabHost
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/tabhost">
    <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="0" />


</android.support.v4.app.FragmentTabHost>