Brtdku

Glide.with((getContext())).load(user.getImgURl()).into(image_profile);

The above line is returning getContext as null hence allowing the app to crash.
I have added this in a fragment under the onDataChange method as follows.

public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {



    View view=inflater.inflate(R.layout.fragment_profile, container, false);



    image_profile=view.findViewById(R.id.profile_image);

    username=view.findViewById(R.id.username);





    storageReference=FirebaseStorage.getInstance().getReference("uploads");



    fuser=FirebaseAuth.getInstance().getCurrentUser();

    reference=FirebaseDatabase.getInstance().getReference("Users").child(fuser.getUid());









    reference.addValueEventListener(new ValueEventListener() {





        @Override

        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {





            User user= dataSnapshot.getValue(User.class);

            username.setText(user.getUsername());



            if(user.getImgURl()!= null && user.getImgURl().equals("default")){

                image_profile.setImageResource(R.mipmap.ic_launcher);

            }else{



            Glide.with((getContext())).load(user.getImgURl()).into(image_profile);



            }



        }



        @Override

        public void onCancelled(@NonNull DatabaseError databaseError) {



        }

    });







    image_profile.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View v) {

            openImage();

        }

    });





    return view;

}

The code is supposed to retrieve an image from firebase storage and display it onto the image_profile.

The following is the logcat for the error:

java.lang.NullPointerException: 

You cannot start a load on a not yet attached View or a Fragment where getActivity() returns null (which usually occurs when getActivity() is called before the Fragment is attached or after the Fragment is destroyed).

        at com.bumptech.glide.util.Preconditions.checkNotNull(Preconditions.java:31)

        at com.bumptech.glide.Glide.getRetriever(Glide.java:675)

        at com.bumptech.glide.Glide.with(Glide.java:707)

        at com.hello.khushboo.messaging.Fragments.ProfileFragment$1.onDataChange(ProfileFragment.java:110)

        at com.google.firebase.database.core.ValueEventRegistration.fireEvent(com.google.firebase:firebase-database@@16.0.5:75)

        at com.google.firebase.database.core.view.DataEvent.fire(com.google.firebase:firebase-database@@16.0.5:63)

        at com.google.firebase.database.core.view.EventRaiser$1.run(com.google.firebase:firebase-database@@16.0.5:55)

        at android.os.Handler.handleCallback(Handler.java:873)

        at android.os.Handler.dispatchMessage(Handler.java:99)

        at android.os.Looper.loop(Looper.java:193)

        at android.app.ActivityThread.main(ActivityThread.java:6669)

        at java.lang.reflect.Method.invoke(Native Method)

        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)

        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

Any help is appreciated.
Thank you in advance.

in fragment use getActivity() for context like this :
below code:

 Glide.with(getActivity())

            .load(imageUri)

            .into(imageview);

If(isAdded()) {

   Glide.with((getActivity().getContext())).load(user.getImgURl()).into(image_profile)

}

Hope it will help.

Just add a check to null

if (getContext() != null) {

    Glide.with((getContext())).load(user.getImgURl()).into(image_profile);

}

And remove Firebase listener in onDestroyView() or onDestroy():

reference.removeEventListener(listener);

I hope it works.

 Glide.with(view.getContext()).load(user.getImgURl()).into(image_profile);

Instead of using getContext. Try using getActivity. Works all the time for me. Putting this in code, we have:

Glide.with((getActivity())).load(user.getImgURl()).into(image_profile);

More details

This is the relationship between an Activity and a Context:

  ↳ android.content.Context

      ↳ android.content.ContextWrapper

          ↳ android.view.ContextThemeWrapper

              ↳ android.app.Activity

From the illustration above, we can see that Activity is a type of Context and that's why it's usable here.

I hope this helps. Merry coding.