ASSETS FOLD E LAYOUT-LAND

Esse código deve ser colocando abaixo de

 @Overrideprotected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    init();
}

            private void init(){ webview = (WebView)findViewById(R.id.webview); webview.loadUrl("file:///android_asset/GdroidBrasil.html"); webview.requestFocus(); progressDialog = new ProgressDialog(MainActivity.this); progressDialog.setMessage("Loading"); progressDialog.setCancelable(false); progressDialog.show(); webview.setWebViewClient(new WebViewClient() { public void onPageFinished(WebView view, String url) { try { progressDialog.dismiss(); } catch (Exception e) { e.printStackTrace(); } } }); }

Esse código deve ser colocado acima de

@Overrideprotected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    init();
}

                               WebView webview; ProgressDialog progressDialog;

Vejam o vídeo Tutorial