Android Delete button Visibility

switchDeleteItemButtonVisibility.java

/**
     * Parameter의 state(View.VISIBLE, INVISIBLE)에 따라
     * 연락처의 각 view에 삭제 버튼의 Visibility를 설정
     * @param state 설정할 Visibility(View.VISIBLE, INVISIBLE)
     */
    private void switchDeleteItemButtonVisibility(int state) {
        ArrayList<Contact> frequentContacts = getFrequntlyContacts();

        for (int i = 0; i <= contact_table.getChildCount() - 1; i++) {
            TableRow row = (TableRow) contact_table.getChildAt(i);
            for (int j = 0; j < 2; j++) {
                View item = row.getChildAt(j);
                if (item != null) {
                    ImageButton deleteButton = (ImageButton) item.findViewById(R.id.contact_item_delete);
                    Contact deleteContact = (Contact) deleteButton.getTag();
                    Boolean isFrequnt = false;
                    for (Contact contact : frequentContacts)
                        if (contact.id.equals(deleteContact.id))
                            isFrequnt = true;

                    if (!isFrequnt)
                        deleteButton.setVisibility(state);
                }
            }
        }

        // 하단의 삭제 버튼을 삭제 완료 버튼으로 변경과 본래 삭제 버튼으로 돌아옴
        if (state == View.INVISIBLE) {
            delete_button.setCompoundDrawablesWithIntrinsicBounds(R.drawable.delete, 0, 0, 0);
            delete_button.setText(context.getResources().getString(R.string.delete));
        } else {
            delete_button.setCompoundDrawablesWithIntrinsicBounds(R.drawable.done, 0, 0, 0);
            delete_button.setText(context.getResources().getString(R.string.done));
        }
    }