Webview

webview.java

public class WebActivity extends AppCompatActivity {
    WebView myWebView;
    public static String url="http://www.google.co.in";
    ProgressBar determinateBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        determinateBar=findViewById(R.id.determinateBar);

        myWebView = (WebView) findViewById(R.id.webview);
        myWebView.setWebViewClient(new MyBrowser());
        myWebView.getSettings().setLoadsImagesAutomatically(true);
        myWebView.getSettings().setJavaScriptEnabled(true);
        myWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        myWebView.loadUrl(url);

    }
        @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {

// Check if the key event was the Back button and if there's history
        if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
            myWebView.goBack();
            return true;
        }
        // If it wasn't the Back key or there's no web page history, bubble up to the default
        // system behavior (probably exit the activity)
        return super.onKeyDown(keyCode, event);
    }
    
    
    private class MyBrowser extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            super.onPageStarted(view, url, favicon);
            determinateBar.setVisibility(View.VISIBLE);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            determinateBar.setVisibility(View.INVISIBLE);

            if (WebActivity.url.equals(url))
            view.loadUrl("javascript:" +
                    "var footer = document.getElementById(\"footer\"); " +
                    "footer.parentNode.removeChild(footer);" +
                    " var header = document.getElementsByTagName(\"header\")[0].style.display = 'none';");


        }
    }

}