Android foundation - Advanced UI components: Tab

Layout file

<? Xml Version = "1.0" encoding = "UTF-8" ?> 
< TabHost 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 =." the MainActivity " 
    Android: Orientation = "Vertical Number of" 
    Android: the above mentioned id = "@ Android: the above mentioned id / TabHost" 
    > 
<-! tab layout which requires two files: one is above the label layout, a layout is the following content ->
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">
        </TabWidget>

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


</TabHost>

Two sub-layout files

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/left"
    >

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/a"
        />


</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/right"
    >

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:src="@drawable/b"
        />


</LinearLayout>

java call

package com.example.myhighuiiiii;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TabHost;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    TabHost tabHost = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Super .onCreate (savedInstanceState); 
        the setContentView (R.layout.activity_main); 
        TabHost = (TabHost) the findViewById (android.R.id.tabhost); 
        tabHost.setup (); 

        // load two tabs tab1, the layout tab2 file 
        LayoutInflater = LayoutInflater.from inflater so that ( the this ); 
        Inflater.inflate ( 
                R.layout.tab1, tabHost.getTabContentView () 
        ); 
        Inflater.inflate ( 
                R.layout.tab2, tabHost.getTabContentView () 
        ); 

        // add a first tabs 
        tabHost.addTab ( 
                tabHost.newTabSpec ( "tab1" )
                        .setIndicator ( "Selection expression" ) 
                        .setContent (R.id.left)); 
        // add a second tab 
        tabHost.addTab ( 
                tabHost.newTabSpec ( "TAB2" ) 
                        .setIndicator ( "Submission Selection" ) 
                        . the setContent (R.id.right)); 
    } 
}