Android Studio: создать приложение apk из вебсайта

<?xml version="1.0" encoding="utf-8"?>
<!-- Constraint Layout to display all the details of header file -->
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="@dimen/nav_header_height"
    android:background="#6C6B74"
    android:gravity="bottom"
    android:orientation="vertical"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:theme="@style/ThemeOverlay.AppCompat.Dark">
 
    <!-- Image View to display logo of application in header -->
    <ImageView
        android:id="@+id/imageView"
        android:layout_width="107dp"
        android:layout_height="87dp"
        android:layout_gravity="center"
        android:contentDescription="@string/nav_header_desc"
        android:foregroundGravity="center"
        android:paddingTop="@dimen/nav_header_vertical_spacing"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.247"
        app:srcCompat="@drawable/gfg_round" />
 
    <!-- TextView for name of application -->
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="51dp"
        android:layout_gravity="center"
        android:gravity="center"
        android:paddingTop="@dimen/nav_header_vertical_spacing"
        android:text="GeeksForGeeks"
        android:textAppearance="@style/TextAppearance.AppCompat.Body1"
        android:textColor="#01A109"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/imageView"
        app:layout_constraintVertical_bias="1.0" />
</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Group is used to group all these items together -->
    <group android:checkableBehavior="single">
 
        <!-- Three items are added as name of three portals -->
        <!-- Portal number 1- Home -->
        <!-- menu category is used as secondary so that backstack
        (going back by pressing back button) can be used -->
        <item
            android:id="@+id/nav_home"
            android:icon="@drawable/home"
            android:menuCategory="secondary"
            android:title="@string/menu_home" />
 
        <!-- Portal number 2- Practice -->
        <item
            android:id="@+id/nav_gallery"
            android:icon="@drawable/practice_gfg"
            android:menuCategory="secondary"
            android:title="Practice" />
 
        <!-- Portal number 3- Contribute -->
        <item
            android:id="@+id/nav_slideshow"
            android:icon="@drawable/contribute_gfg"
            android:menuCategory="secondary"
            android:title="Contribute" />
    </group>
</menu>

<?xml version="1.0" encoding="utf-8"?>
<!-- DrawerLayout acts as top level container for window content that allows for
     interactive “drawer” views to be pulled out from one or both vertical edges of the window -->
<androidx.drawerlayout.widget.DrawerLayout
    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:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">
 
    <!-- To reuse layouts include tag is used -->
    <include
        layout="@layout/app_bar_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
 
    <!-- Navigation view to make navigation drawer -->
    <com.google.android.material.navigation.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:background="#2E303E"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main"
        app:itemIconTint="#fff"
        app:itemTextColor="#fff"
        app:menu="@menu/activity_main_drawer" />
</androidx.drawerlayout.widget.DrawerLayout>

<?xml version="1.0" encoding="utf-8"?>
<navigation
    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:id="@+id/mobile_navigation"
    app:startDestination="@+id/nav_home">
 
    <!-- These fragments are made to work on all 
    the items listed in navigation drawer
    so that the java files can be managed separately -->
 
    <!-- Fragment for Home portal-->
    <fragment
        android:id="@+id/nav_home"
        android:name="com.example.geeksforgeeks.ui.home.HomeFragment"
        android:label="@string/menu_home"
        tools:layout="@layout/fragment_home" />
 
    <!-- Fragment for Practice portal-->
    <fragment
        android:id="@+id/nav_gallery"
        android:name="com.example.geeksforgeeks.ui.gallery.GalleryFragment"
        android:label="Practice"
        tools:layout="@layout/fragment_gallery" />
 
    <!-- Fragment for Contribute-->
    <fragment
        android:id="@+id/nav_slideshow"
        android:name="com.example.geeksforgeeks.ui.slideshow.SlideshowFragment"
        android:label="Contribute"
        tools:layout="@layout/fragment_slideshow" />
</navigation>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".ui.home.HomeFragment">
 
    <!-- WebView is added on full screen so that application interface can 
    be interactive and user can the web content is visible on full screen -->
    <WebView
        android:id="@+id/web_view_home"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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"
    android:background="#6C6B74"
    tools:context=".help">
 
    <!-- Image to display help sign-->
    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="255dp"
        android:layout_height="173dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.222"
        app:srcCompat="@drawable/help" />
 
    <!-- Indicating user that we are here
         to help by using a textview-->
    <TextView
        android:id="@+id/textView2"
        android:layout_width="371dp"
        android:layout_height="95dp"
        android:background="#2E303E"
        android:text="For any kind of queries or help you can contact us at-"
        android:textColor="#FFFCFC"
        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView3"
        app:layout_constraintVertical_bias="0.296" />
 
    <!-- Contact details for help-->
    <TextView
        android:id="@+id/textView3"
        android:layout_width="393dp"
        android:layout_height="59dp"
        android:background="#2E303E"
        android:text="careers@geeksforgeeks.org"
        android:textColor="#FFFFFF"
        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.666"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView2"
        app:layout_constraintVertical_bias="0.159" />
</androidx.constraintlayout.widget.ConstraintLayout>

import android.webkit.WebView;
import android.webkit.WebViewClient;
 
// class is extended to WebViewClient to access the WebView 
public class WebViewController extends WebViewClient {
   
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        // loadurl function will load the 
        // url we will provide to our webview  
        view.loadUrl(url);
        return true;
    }
}

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import com.example.geeksforgeeks.R;
import com.example.geeksforgeeks.WebViewController;
 
public class HomeFragment extends Fragment {
 
    private HomeViewModel homeViewModel;
 
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 
        homeViewModel = new ViewModelProvider(this).get(HomeViewModel.class);
        View root = inflater.inflate(R.layout.fragment_home, container, false);
 
        // Created a WebView and used the loadurl method to give url to WebViewController class
        WebView webView = root.findViewById(R.id.web_view_home);
        webView.loadUrl("https://www.geeksforgeeks.org/");  // Url of portal is passed
        webView.setWebViewClient(new WebViewController());  // WebViewController is used
        return root;
    }
}

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import com.example.geeksforgeeks.R;
import com.example.geeksforgeeks.WebViewController;
 
public class GalleryFragment extends Fragment {
 
    private GalleryViewModel galleryViewModel;
 
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 
        galleryViewModel = new ViewModelProvider(this).get(GalleryViewModel.class);
        View root = inflater.inflate(R.layout.fragment_gallery, container, false);
 
        WebView webView = root.findViewById(R.id.web_view_practice);
        webView.loadUrl("https://practice.geeksforgeeks.org/");
        webView.setWebViewClient(new WebViewController());
        return root;
    }
}

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import com.example.geeksforgeeks.R;
import com.example.geeksforgeeks.WebViewController;
 
public class SlideshowFragment extends Fragment {
 
    private SlideshowViewModel slideshowViewModel;
 
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 
        slideshowViewModel = new ViewModelProvider(this).get(SlideshowViewModel.class);
        View root = inflater.inflate(R.layout.fragment_slideshow, container, false);
 
        WebView webView = root.findViewById(R.id.web_view_contribute);
        webView.loadUrl("https://www.geeksforgeeks.org/contribute/");
        webView.setWebViewClient(new WebViewController());
        return root;
    }
}

import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.navigation.NavigationView;
 
public class MainActivity extends AppCompatActivity {
 
    private AppBarConfiguration mAppBarConfiguration;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
         
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
 
        // Code for floating button
        FloatingActionButton fab = findViewById(R.id.fab);
 
        // On click listener is used on floating button
        // to redirect to help activity
        fab.setOnClickListener(view -> {
            // Intent is used to connect help activity to floating button
            Intent activity2Intent = new Intent(getApplicationContext(), help.class);
            startActivity(activity2Intent);
        });
 
        // default code for drawer layout and navigation view
        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
 
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow)
                .setOpenableLayout(drawer)
                .build();
 
        // default code to control the navigation view
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);
    }
 
    @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;
    }
 
    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }
}