ara.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               Intent niyet=new Intent(Intent.ACTION_VIEW,Uri.parse("www.google.com"));
startActivity(niyet);

https://www.google.com

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class Main extends Activity {

    private WebView mWebview ;

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        mWebview  = new WebView(this);

        mWebview.getSettings().setJavaScriptEnabled(true); // enable javascript

        final Activity activity = this;

        mWebview.setWebViewClient(new WebViewClient() {
            public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                Toast.makeText(activity, description, Toast.LENGTH_SHORT).show();
            }
        });

        mWebview .loadUrl("http://www.google.com");
        setContentView(mWebview );

    }

}

Intent Browse = new Intent(Intent.ACTION_VIEW,Uri.parse("http://YOUR WEB SITE NAME"));
    startActivity(Browse);