Android TabHost如何实现顶部选项卡

用TabHost 来实现顶部选项卡，上代码：activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity">

  <TabHost
    android:id="@+id/tabMenu"
    android:layout_width="match_parent"
    android:layout_height="0dp">

    <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical">

      <TabWidget
        android:id="@android:id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

      <FrameLayout
        android:id="@android:id/tabcontent"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
          android:id="@+id/tab1"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical">

        </LinearLayout>

        <LinearLayout
          android:id="@+id/tab2"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical">

        </LinearLayout>

        <LinearLayout
          android:id="@+id/tab3"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:orientation="vertical">

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

</android.support.constraint.ConstraintLayout>

主方法MainActivity.java

package action.sun.com.tabhost;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TabHost;

public class MainActivity extends AppCompatActivity {

  private TabHost tabhost;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //得到TabHost对象实例
    tabhost =(TabHost) findViewById(R.id.tabMenu);

    //调用 TabHost.setup()
    tabhost.setup();
    //创建Tab标签
    tabhost.addTab(tabhost.newTabSpec("one").setIndicator("红色").setContent(R.id.tab1));
    tabhost.addTab(tabhost.newTabSpec("two").setIndicator("黄色").setContent(R.id.tab2));
    tabhost.addTab(tabhost.newTabSpec("three").setIndicator("黄色").setContent(R.id.tab3));

    tabhost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
      @Override
      public void onTabChanged(String s) {
        Log.d("xxx", "onTabChanged: ="+s);
        if (s.equals("one")){
          //可是让viewpage的视图显示出来
          //viewPager.setCurrentItem(0);
        }else if (s.equals("two")){
          ////可是让viewpage的视图显示出来
          // viewPager.setCurrentItem(1);
        }
      }
    });
  }
}

实现效果

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