Check Whether Internet Connection is available or not?

Question

I am working on online app. [Problem] when internet is down or not available it gives me error [Force close], I tried to handle using broadCast Receiver but not meet exact solution, looking for better solution.

public class MyBroadcastReceiver extends BroadcastReceiver {

@Override
public void onReceive(final Context context, final Intent intent) {

    NetworkInfo info = intent
            .getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);

    if (null != info) {

        String state = info.getState().toString();

        if (state.equalsIgnoreCase("CONNECTED")) {
            SplashScreen.isWiFiConnected = true;
            Log.i("isWifiConnected", "=================TRUE");
        } else {
            SplashScreen.isWiFiConnected = false;
            Log.i("isWifiConnected", "=================FALSE");
        }

    }

}

}

thanks.

Answer 1

static String data = null;
private static HttpPost httppost;
private static HttpParams httpParameters;
private static int timeoutConnection = 30000;
private static HttpClient httpclient = null;
private static HttpResponse response = null;
private static int responseCode=0;
public static ConnectivityManager mConnectivityManager;
public static NetworkInfo mNetworkInfo;
public static boolean isNetError=false;

/** Post Http data and returns final string and status on network */

public static void postHttp(String Url, Activity mActivity) {
try {
    isNetError=false;

    mConnectivityManager= (ConnectivityManager) mActivity.getSystemService(Context.CONNECTIVITY_SERVICE);
    mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();

    if (mNetworkInfo != null && mNetworkInfo.isConnectedOrConnecting())
    {
        httppost = new HttpPost(Url);
        httpParameters = new BasicHttpParams();
        HttpConnectionParams.setSoTimeout(httpParameters, timeoutConnection);
        httpclient = new DefaultHttpClient(httpParameters);

        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        nameValuePairs.add(new BasicNameValuePair("text", "some Text"));


        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, HTTP.UTF_8));

        // Execute HTTP Post Request
        response = httpclient.execute(httppost);
        data = EntityUtils.toString(response.getEntity());

    }
    else
        isNetError=true;

    } catch (Exception e) {
        e.printStackTrace();
        isNetError=true;
        }

   if (responseCode == 200)
   {
        isNetError=false;
        System.out.println("final..." + data);
        }
        else
            isNetError=true;
    }

call this method in your doInBackground() of asyntask, and onPostExecute() check isNetError value and as mentioned in other answer of adding permission <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

if(isNetError)
//No internet 
else
//do your stuff

Answer 2

Just use this function to check whether the Internet connection is available or not:

/**
   * Checks if the device has Internet connection.
   * 
   * @return <code>true</code> if the phone is connected to the Internet.
   */
    public static boolean checkNetworkConnection(Context context)
    {
        final ConnectivityManager connMgr = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
        
        final android.net.NetworkInfo wifi =connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        final android.net.NetworkInfo mobile =connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        
        if(wifi.isAvailable()||mobile.isAvailable())
            return true;
        else
            return false;
    }

Note:

Don't forget to add permission inside the AndroidManifest.xml file: <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />