Connectivity manager gives null pointer exception in android

Question

My Code to check internet connection.

public boolean internet() {

    boolean flag = false;
    //context=FindPeopleFragment_revice.this;
//  FindPeopleFragment_revice.context = this;
    ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);

    if (cm != null) {
        NetworkInfo[] info = cm.getAllNetworkInfo();
        if (info != null) {
            if (info[0].getState() == NetworkInfo.State.CONNECTED
                    || info[1].getState() == NetworkInfo.State.CONNECTED) {
                flag = true;

            } else {
                flag = false;
            }
        }

    }
    return flag;
}

When I Turn off/On Location API at that time Exception Arise at a point:

ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);

Ecexption Arise:

08-25 12:47:25.184: E/AndroidRuntime(29169): FATAL EXCEPTION: main
08-25 12:47:25.184: E/AndroidRuntime(29169): Process: info.staffmark, PID: 29169
08-25 12:47:25.184: E/AndroidRuntime(29169): java.lang.NullPointerException
08-25 12:47:25.184: E/AndroidRuntime(29169):    at info.staffmark.FindPeopleFragment_revice.internet(FindPeopleFragment_revice.java:1210)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at info.staffmark.FindPeopleFragment_revice.onLocationChanged(FindPeopleFragment_revice.java:1822)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at com.google.android.gms.internal.jg$a.handleMessage(Unknown Source)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at android.os.Handler.dispatchMessage(Handler.java:102)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at android.os.Looper.loop(Looper.java:146)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at android.app.ActivityThread.main(ActivityThread.java:5511)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at java.lang.reflect.Method.invokeNative(Native Method)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at java.lang.reflect.Method.invoke(Method.java:515)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
08-25 12:47:25.184: E/AndroidRuntime(29169):    at dalvik.system.NativeStart.main(Native Method)

OnLocation Change method:

@Override
    public void onLocationChanged(android.location.Location location) {
        // TODO Auto-generated method stub

    //  internet = internet();
        internet = cd.isConnectingToInternet();

        Log.d("Net Status is", "Net is " + internet);   
        if (internet) {

        Double Latitude=location.getLatitude();
        Double Longitude=location.getLongitude();

        variable.CurrentLat=Latitude;
        variable.CurrentLong=Longitude;

        Log.d("Latitude is", ""+Latitude);

        Log.d("Longitude is", ""+Longitude);

        try {
            Thread.sleep(2000);
        } catch (InterruptedException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

        final Geocoder gcd = new Geocoder(getActivity().getApplicationContext());

        List<Address> addresses;
        try {
            addresses = gcd.getFromLocation(Latitude, Longitude, 10);

            for (Address address : addresses) {
                if(address.getPostalCode()!=null){
                       // Log.d("licality",address.getLocality());
                        Log.d("postalcode","Postal Code is"+address.getPostalCode());
                        variable.currentZip=address.getPostalCode();

                        internet = internet();
                        if (internet) {

                            if(variable.LocationType.equals("")){
                                internet=internet();
                                if(internet){
                                if(LocationType.equals("")){
                                    Location(); 
                                }
                                }else{
                                    Toast.makeText(getActivity(), "Internet service is not available in your device.", Toast.LENGTH_LONG).show();
                                }
                            }else{
                                 internet=internet();
                                 if(internet()){
                                     Data();     
                                     ShowMarkerMap();
                                 }else{
                                     Toast.makeText(getActivity(), "Internet service is not available in your device.", Toast.LENGTH_LONG).show();
                                 }}

                        } else {
                            Toast.makeText(getActivity(),"Internet service is not available in your device.",Toast.LENGTH_LONG).show();
                        }
                }
                }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


     }

    }

Exception arise at On location change method while checking internet connection.

I confuse how to solve this.

Please help me to solve this, Thanks.

Include the stack trace... Have you requested permission to access network state? — mstrthealias, Aug 25 '14 at 07:10
This is on 1210: ConnectivityManager cm = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE); — user3916943, Aug 25 '14 at 08:25
I think `getActivity()` is returning null. Can you check that and fix that? — MysticMagicϡ, Aug 25 '14 at 08:33

Wagner Michael · Answer 1 · 2014-08-25T08:28:52.393

0

in case this code is in the oncreate() of your fragment, try putting it in onActivityCreated(). My guess: getActivity returns null. You should atleast put your stacktrace in your question thought.

Check : http://developer.android.com/reference/android/app/Fragment.html#onCreate(android.os.Bundle)

It tells you: "Note that this can be called while the fragment's activity is still in the process of being created. As such, you can not rely on things like the activity's content view hierarchy being initialized at this point. If you want to do work once the activity itself is created, see onActivityCreated(Bundle)."

edited Aug 25 '14 at 08:28

answered Aug 25 '14 at 07:10

Wagner Michael

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Please help to solve this issue.If you have any idea – user3916943 Aug 25 '14 at 08:18
can u post your OnLocationChanged code ? And where do you set your LocationChangedListener ? in Oncreate ? – Wagner Michael Aug 25 '14 at 08:21
I am using fragment so onCreateView() is called – user3916943 Aug 25 '14 at 08:24
i still guess you set you listener at the wrong position. try putting it in onactivitycreated. – Wagner Michael Aug 25 '14 at 08:29

Connectivity manager gives null pointer exception in android

1 Answers1