MealListActivity.java

        final EditText filterEditText = (EditText) addIngredientView.findViewById(R.id.name_filter);
        filterEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                Filter filter = ingredientListAdapter.getFilter();
                filter.filter(s, new Filter.FilterListener() {
                    @Override
                    public void onFilterComplete(int count) {
                        int icon = count == 0 ? android.R.drawable.ic_menu_add : 0;
                        filterEditText.setCompoundDrawablesWithIntrinsicBounds(0, 0, icon, 0);
                    }
                });
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {
            }
        });