寫MarkDown編譯器的快捷鍵時碰到的常見但又不太好想的問題

通用代碼

//獲取光標位置
    private int getEditTextCursorIndex(EditText editText){
        return editText.getSelectionStart();
    }
    //向光標處插入文本
    private void insertText(EditText editText,String string){
        editText.getText().insert(getEditTextCursorIndex(editText),string);
    }
    //光標左移
    private void setEditTextCusorRollLeft(EditText editText,int rollLeft){
        editText.setSelection(getEditTextCursorIndex(editText)-rollLeft);
    }
 

快捷鍵實現樣例

case R.id.sk_head1:
                insertText(mEdContent,"# ");
                break;
            case R.id.sk_head2:
                insertText(mEdContent,"## ");
                break;
            case R.id.sk_head3:
                insertText(mEdContent,"### ");
                break;
            case R.id.sk_code:
                insertText(mEdContent,"```\n\n```");
                setEditTextCusorRollLeft(mEdContent,4);
                break;
            case R.id.sk_use:
                mEdContent.append("> ");
                break;
            case R.id.sk_xieti:
                mEdContent.append("**");
                setEditTextCusorRollLeft(mEdContent,1);
                break;
 

EditText在光標處插入字符