Crash When Is No Internet Connection

The following code crashes when is no interenet connection : public String gourl(String myurl,String params) { URL url; String rasp = ''; try {

Solution 1:

Check connection before execute your method, something like that:

publicbooleanisNetworkConnected() {
         finalConnectivityManagerconMgr= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
         finalNetworkInfoactiveNetwork= conMgr.getActiveNetworkInfo();
         return activeNetwork != null && activeNetwork.getState() == NetworkInfo.State.CONNECTED;
    }

Solution 2:

Have you checked what the values of myurl and params are in the method?

It may be that url.openStream() is failing and causing a NullPointerException.

It's also helpful to rather do something like:

Log.w("DHA", "EXCEPTIE URL:" + e.toString());

Then you will see what the Exception is rather than having to guess.

Solution 3:

Check for all Internet connection

For Wifi

public boolean isWifi(Context context){
    try{
    WifiManager wifi=(WifiManager) 

context.getSystemService(Context.WIFI_SERVICE);
    if(wifi.isWifiEnabled()){
    returntrue;
    }else{
        returnfalse;
    }
    }
    catch(Exception e){
        e.getMessage();
        returnfalse;
    }
}

For Other Network

public  boolean isOline(Context context){
    try{
        ConnectivityManager cm=(ConnectivityManager) 

   context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if(cm==null)
            returnfalse;
        NetworkInfo info=cm.getActiveNetworkInfo();
        if(info==null)
            returnfalse;
        return info.isConnectedOrConnecting();
    }
    catch(Exception e){
        e.getMessage();
        returnfalse;
    }
}  

If any of them is present then process WS else show alert.And Never forget to mention

<uses-permissionandroid:name="android.permission.INTERNET" /><uses-permissionandroid:name="android.permission.ACCESS_WIFI_STATE"/><uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE"/>