Firebase for Java

MainAcitivity.java

private Firebase mMembers;
private ImageView mImageView;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_main, container, false);

    this.mImageView = (ImageView)rootView.findViewById(R.id.fragment_main_frame_002);

    Firebase.setAndroidContext(getActivity());
    this.mMembers = new Firebase("https://team-takoyaki.firebaseio.com/members");
    this.mMembers.addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(DataSnapshot dataSnapshot, String s) {
            Map<String, String> member = (Map<String, String>)dataSnapshot.getValue();
            String name = member.get("name");
            Log.d("Firebase", name);
            if (!member.containsKey("profile_image")) {
                return;
            }

            String profileImageString = (String)member.get("profile_image");
            byte[] profileImageByte = Base64.decode(profileImageString, Base64.DEFAULT);
            Bitmap bitmap = BitmapFactory.decodeByteArray(profileImageByte, 0, profileImageByte.length);
            mImageView.setImageBitmap(bitmap);
        }

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

        }

        @Override
        public void onChildRemoved(DataSnapshot dataSnapshot) {

        }

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

        }

        @Override
        public void onCancelled(FirebaseError firebaseError) {

        }
    });

    rootView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Bitmap bmp =  BitmapFactory.decodeResource(getResources(),
                    R.drawable.suntv);
            ByteArrayOutputStream bYtE = new ByteArrayOutputStream();
            bmp.compress(Bitmap.CompressFormat.PNG, 100, bYtE);
            bmp.recycle();
            byte[] byteArray = bYtE.toByteArray();
            String imageFileString = Base64.encodeToString(byteArray, Base64.DEFAULT);

            Map<String, String> member = new HashMap<String, String>();
            member.put("name", "Google");
            member.put("profile_image", imageFileString);
            Firebase data = mMembers.push();
            data.setValue(member);
        }
    });

    return rootView;
}