پراگرس دیالوگ :|

import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Typeface;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.Toast;

public class WebView extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);
        Button btn = (Button)findViewById(R.id.button1);
        Typeface font = Typeface.createFromAsset(getAssets(),"font/nazanin.ttf");

        WebView myWebView = (WebView) findViewById(R.id.webView1);
        myWebView.setWebViewClient(new WebViewClient());
        myWebView.getSettings().setJavaScriptEnabled(true);
        myWebView.getSettings().setLoadWithOverviewMode(true);
        myWebView.getSettings().setUseWideViewPort(true);
        myWebView.getSettings().setBuiltInZoomControls(true);
        myWebView.loadUrl("http://Youame.com/index");
        
        if(isNetworkConnected()){ // check inteet connection
            
        }
        else{        
            myWebView.loadUrl("file:///android_asset/int.html"); \فایلی که توش نوشته به اینترنت وصل نیستین
            btn.setText("ابتدا به اینترنت متصل شوید و سپس به این بخش وارد شوید");

        }

        
        
        
        btn.setTypeface(font);
        
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://Youame.com/index"));
                startActivity(browserIntent);
                Toast.makeText(getApplicationContext(), "باز کردن در مرورگر", Toast.LENGTH_LONG).show();
            }
            
        });  
        
    }

    private boolean isNetworkConnected() { // check inteet connection
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo ni = cm.getActiveNetworkInfo();
        if (ni == null) {
            // There are no active networks.
            retu false;
        } else
            retu true;
        }

}