Process: in.arnavvohra.arry2, PID: 31290
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference

RadioButton subChannelRadioBtn= new RadioButton(getActivity());

at in.arnavvohra.arry2.Fragments.ChannelDiscussionsFragment$2.onChildAdded(ChannelDiscussionsFragment.java:129)

mSubChannelRef.addChildEventListener(new ChildEventListener() {

            @Override
            public void onChildAdded(DataSnapshot dataSnapshot, String s) {

                //Triggered once for each existing child & triggered again whenever a child is added to this path.
                Map<String, String> subChannelNameMap = (HashMap<String, String>) dataSnapshot.getValue();

                    String key=dataSnapshot.getKey();
                    String subChannelName=subChannelNameMap.values().toString();

                    RadioButton subChannelRadioBtn= new RadioButton(getActivity());

                    subChannelRadioBtn.setText(subChannelName);
                //Setting a tag on the radio btn so that it can be deleted from radioGroup when onChildRemoved is called i.e a subChannel is deleted
                    subChannelRadioBtn.setTag(key);
                    subChannelRadioBtn.setChecked(true);//debate this, if I want to add noices in home screen

                    mSubChannelRadioGrp.addView(subChannelRadioBtn);
            }

            @Override
            public void onChildChanged(DataSnapshot dataSnapshot, String s) {}

            @Override
            public void onChildRemoved(DataSnapshot dataSnapshot) {
                String key2= dataSnapshot.getKey();
                mSubChannelRadioGrp.removeView(mSubChannelRadioGrp.findViewWithTag(key2));
                //Remove the corresponding radioBtn from the radioGrp when the subChannel is removed from the db.
            }

            @Override
            public void onChildMoved(DataSnapshot dataSnapshot, String s) {}

            @Override
            public void onCancelled(DatabaseError databaseError) {}
        });

E/AndroidRuntime: FATAL EXCEPTION: main
Process: in.arnavvohra.arry2, PID: 31290
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
at android.view.ViewConfiguration.get(ViewConfiguration.java:383)
at android.view.View.<init>(View.java:3700)
at android.view.View.<init>(View.java:3797)
at android.widget.TextView.<init>(TextView.java:690)
at android.widget.Button.<init>(Button.java:111)
at android.widget.CompoundButton.<init>(CompoundButton.java:85)
at android.widget.RadioButton.<init>(RadioButton.java:65)
at android.widget.RadioButton.<init>(RadioButton.java:61)
at android.widget.RadioButton.<init>(RadioButton.java:57)
at android.widget.RadioButton.<init>(RadioButton.java:53)
at in.arnavvohra.arry2.Fragments.ChannelDiscussionsFragment$2.onChildAdded(ChannelDiscussionsFragment.java:129)
at com.google.android.gms.internal.zzahh.zza(Unknown Source)
at com.google.android.gms.internal.zzajh.zzctc(Unknown Source)
at com.google.android.gms.internal.zzajk$1.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5930)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)