Below is a simple android activity which shows you clearly how to open a particular url inside our native application. In here we have taken a single xml i.e. "show_web_view" which is used as a layout of this activity in which only a WebView is defined.

public class OpenUrlWebView extends Activity {

//private Button button;
private WebView webView;
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.show_web_view);

    //Get webview
    webView = (WebView) findViewById(R.id.webView1);

    startWebView("http://www.google.com");

}

private void startWebView(String url) {

 //Create new webview Client to show progress dialog
    //When opening a url or click on link

    webView.setWebViewClient(new WebViewClient() {     
        ProgressDialog progressDialog;

        //If you will not use this method url links are opeen in new brower not in webview
        public boolean shouldOverrideUrlLoading(WebView view, String url) {             
            view.loadUrl(url);
            return true;
        }

        //Show loader on url load
        public void onLoadResource (WebView view, String url) {
            if (progressDialog == null) {
                // in standard case YourActivity.this
                progressDialog = new ProgressDialog(ShowWebView.this);
                progressDialog.setMessage("Loading...");
                progressDialog.show();
            }
        }
        public void onPageFinished(WebView view, String url) {
            try{
            if (progressDialog.isShowing()) {
                progressDialog.dismiss();
                progressDialog = null;
            }
            }catch(Exception exception){
                exception.printStackTrace();
            }
        }

    });

     // Javascript enabled on webview 
    webView.getSettings().setJavaScriptEnabled(true);

    // Other webview options
    webView.getSettings().setLoadWithOverviewMode(true);
    webView.getSettings().setUseWideViewPort(true);
    webView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
    webView.setScrollbarFadingEnabled(false);
    webView.getSettings().setBuiltInZoomControls(true);

    //Load url in webview
    webView.loadUrl(url);

}

// Open previous opened link from history on webview when back button pressed

@Override
// Detect when the back button is pressed
public void onBackPressed() {
    if(webView.canGoBack()) {
        webView.goBack();
    } else {
        // Let the system handle the back button
        super.onBackPressed();
    }
}

Hope this will help you. If you have any queries regarding please feel free to ask. :)