AlertDialog.Builder builder = new AlertDialog.Builder(context.getApplicationContext());
            LayoutInflater inflater = LayoutInflater.from(context);
            View dialogView = inflater.inflate(R.layout.caller_dialog, null);

            ImageView button = dialogView.findViewById(R.id.close_btn);
            builder.setView(dialogView);
            final AlertDialog alert = builder.create();
            alert.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
            alert.getWindow().setType(WindowManager.LayoutParams.TYPE_PHONE);
            alert.setCanceledOnTouchOutside(true);
            alert.show();
            WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
            Window window = alert.getWindow();
            window.addFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
            window.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
            window.setGravity(Gravity.TOP);
            lp.copyFrom(window.getAttributes());
            //This makes the dialog take up the full width
            lp.width = WindowManager.LayoutParams.MATCH_PARENT;
            lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
            window.setAttributes(lp);
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //close the service and remove the from from the window
                    alert.dismiss();
                }
            });