while (i.hasNext()) {

            tempString = (String) ((DataSnapshot) i.next()).getValue();
            if(tempString.startsWith("http")){

                final int sdk = android.os.Build.VERSION.SDK_INT;

                TextView textView = new TextView(this);
                textView.setTypeface(null, Typeface.BOLD);
                textView.setLayoutParams(params);
                chat_user_name = (String) ((DataSnapshot) i.next()).getValue();
                textView.setTextSize(getResources().getDimension(R.dimen.textsize));
                if(Objects.equals(chat_user_name, user_name)){

                    textView.setText("You sent an image below");
                    textView.setTextColor(Color.BLACK);
                    params.gravity = Gravity.LEFT;

                    if(sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
                        textView.setBackgroundDrawable( getResources().getDrawable(R.drawable.input_user) );
                        textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
                    } else {
                        textView.setBackground( getResources().getDrawable(R.drawable.input_user));
                        textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
                    }
                    textView.setGravity(Gravity.CENTER);
                    linearLayout.addView(textView);
                    final TextView textView1 = new TextView(this);
                    textView1.setText("Tap on image for rotation");
                    linearLayout.addView(textView1);
                    final ImageView  image = new ImageView(this);
                    new ImageDownloader(image,uri).execute(tempString);
                    image.setLayoutParams(new android.view.ViewGroup.LayoutParams(500,250));
                    image.setMaxHeight(500);
                    image.setMaxWidth(350);
                    image.setAdjustViewBounds(true);
                    image.setOnClickListener(new View.OnClickListener(){
                        @Override
                        public void onClick(View v) {
                            image.setRotation((float) 270.0);
                            textView1.setText("");
                        }
                    });