[:en]Android: verify network is available[:]

[:en]

Step 1: AndroidManifest.xml

Step 2: MainActivity.java

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        webView = (WebView) findViewById(R.id.activity_main);
        webView.setWebViewClient(new MyWebViewClient());
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);

        String url = "http://cambridgeways.com";
        webView.getSettings().setJavaScriptEnabled(true);
        if(isConnectingToInternet(getApplicationContext()))   {
            webView.loadUrl(url);
        }else{
            // show alert

            Toast.makeText(getApplicationContext(), "no internet", Toast.LENGTH_LONG).show();
        }
    }



    private boolean isConnectingToInternet(Context applicationContext){
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo ni = cm.getActiveNetworkInfo();
        if (ni == null) {
            // There are no active networks.
            Toast.makeText(getApplicationContext(), "no internet", Toast.LENGTH_LONG).show();
            return false;
        } else
            return true;

    }


    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

Step 3: activity_main.xml

Or Simple Testing

 public class MainActivity extends AppCompatActivity {

    private WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        if(isConnectingToInternet(getApplicationContext()))   {
            Toast.makeText(getApplicationContext(),"Internet available",Toast.LENGTH_LONG).show();
        }else{

            Toast.makeText(getApplicationContext(), "no internet", Toast.LENGTH_LONG).show();
        }
    }


    private boolean isConnectingToInternet(Context applicationContext){
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo ni = cm.getActiveNetworkInfo();
        if (ni == null) {
            // There are no active networks.
            Toast.makeText(getApplicationContext(), "no internet", Toast.LENGTH_LONG).show();
            return false;
        } else
            return true;
    }

}

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