MainActivity.java

package com.example.test;
import com.example.test.R;

import androidx.appcompat.app.AppCompatActivity;

import android.R;
import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class MainActivity extends AppCompatActivity {
    private WebView mywebView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mywebView = (WebView) findViewById(R.id.webview);
        WebSettings webSettings= mywebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        mywebView.loadUrl("https://twitter.com");
// Line of Code for opening links in app
        mywebView.setWebViewClient(new WebViewClient());
    }
    //Code For Back Button
    @Override
    public void onBackPressed() {
        if(mywebView.canGoBack())
        {
            mywebView.goBack();
        }
        else
        {
            super.onBackPressed();
        }
    }
}