Ouvrir une page internet avec WebView

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <WebView android:id="@+id/webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="My.Package"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
        <activity android:name="MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
    <uses-permission android:name="android.permission.INTERNET" />
</manifest>

import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Window;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
 
/**
 * Afficher une page HTML avec Webview
 * http://www.fobec.com/java/1160/ouvrir-une-page-internet-avec-webview.html
 * @author Axel fevrier 2015
 */
 
public class MainActivity extends Activity {
    //Fenetre d'attente
    private ProgressDialog progressDialog;
    //Controle d'affichage HTML
    private WebView webview;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
 
        //Supprimer le titre + créer la vue
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
 
        //Initialer le Webview
        webview = (WebView) findViewById(R.id.webview);
        WebSettings settings = webview.getSettings();
        settings.setJavaScriptEnabled(true);
        webview.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
 
        //Afficher une fenetre d'attente
        progressDialog = ProgressDialog.show(MainActivity.this, "Exemple de Webview", "Chargement...");
 
        //Creer le browser et charger l'url
        webview.setWebViewClient(new MyWebClient());
        webview.loadUrl("http://www.google.com");
    }
 
    /**
     * Surcharger l'evenement retour
     * @param keyCode
     * @param event
     * @return 
     */
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
            webview.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
 
    /**
     * Configurer les evenements du Webview
     */
    public class MyWebClient extends WebViewClient {
 
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
 
        @Override
        public void onPageFinished(WebView view, String url) {
            //  Log.i(TAG, "Finished loading URL: " +url);
            if (progressDialog.isShowing()) {
                progressDialog.dismiss();
            }
        }
 
        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
             Log.e("Myapp", "Error: " + description);
             Toast.makeText(getApplicationContext(), "Erreur: "+description, Toast.LENGTH_LONG).show();              
        }
    }
}