Example of WebView Component in Android Studio Java

MainActivity.java

package com.example.webview01;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

    Button button1,button2;
    WebView webView;

    @Override
    public void onBackPressed() {
        if (webView.canGoBack()){
            webView.goBack();
        }else{
            super.onBackPressed();
        }

    }

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

        webView = (WebView) findViewById(R.id.webview);
        button1 = (Button) findViewById(R.id.button);
        button2 = (Button) findViewById(R.id.button2);

        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                webView.setWebViewClient(new MyWebViewClient());
                webView.getSettings().setJavaScriptEnabled(true);
                String url = "https://abhiandroid.com/ui/webview";
                webView.loadUrl(url);
                /*webView.setWebViewClient(new MyWebViewClient());
                String url = "https://developer.android.com/guide/webapps/webview";
                webView.getSettings().setJavaScriptEnabled(true);
                webView.loadUrl(url);*/
                Boolean canGoBack=webView.canGoBack();
                Boolean canGoForword = webView.canGoForward();

            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                webView.setWebViewClient(new MyWebViewClient());
                webView.getSettings().setJavaScriptEnabled(true);
                webView.loadUrl("file:///android_asset/index.html");
                Boolean canGoBack=webView.canGoBack();
                Boolean canGoForword = webView.canGoForward();
            }
        });

    }
}
class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
}

/*
class MyWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
}*/