internet connectivity

gistfile1.java

public class MainActivity extends Activity implements ConnectivityDialogFragment.ConnectionDialogInterface {

    //region Variables
    private static final String CONNECTIVITY_ACTION = "android.net.conn.CONNECTIVITY_CHANGE";
    private static final String DIALOG_FRAGMENT = "dialog_fragment";

    private ConnectivityReceiver mConnectivityReceiver;
    private IntentFilter mFilter;
    //endregion

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

        mConnectivityReceiver = new ConnectivityReceiver();
        mFilter = new IntentFilter(CONNECTIVITY_ACTION);
    }

    @Override
    protected void onResume() {
        registerReceiver(mConnectivityReceiver, mFilter);

        super.onResume();
    }

    @Override
    protected void onPause() {
        unregisterReceiver(mConnectivityReceiver);

        super.onPause();
    }

    @Override
    public void onOkClick(DialogFragment dialogFragment) {
        if (dialogFragment != null) {
            dialogFragment.dismiss();

            if (!isConnected()) {
                dialogFragment.show(getFragmentManager(),DIALOG_FRAGMENT);
            }
        }
    }

    private void showNetworkDialog() {
        ConnectivityDialogFragment fragment = (ConnectivityDialogFragment) getFragmentManager().findFragmentByTag(DIALOG_FRAGMENT);

        if (fragment == null) {
            fragment = new ConnectivityDialogFragment();
            fragment.show(getFragmentManager(),DIALOG_FRAGMENT);
            fragment.setCancelable(false);
        }
    }

    private boolean isConnected() {
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = cm.getActiveNetworkInfo();

//        return netInfo != null && netInfo.isConnectedOrConnecting();

        return true;
    }

    private class ConnectivityReceiver extends BroadcastReceiver {
        public void onReceive(Context context, Intent intent) {
            if (!isConnected()) {
                showNetworkDialog();
            }
        }
    }
}