Android TabHost的使用 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);
                }
            }
        });
    }
}

代码很简单，实现效果：