本文介绍了如何为edittext实现一个简单的语法高亮方法?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在创建一个涉及编码的应用程序,我需要编辑文本来识别键入的单词是否为某事物,然后根据它是否已注册为彩色,它将为该单词着色。这是我想要做的,当用户键入并输入功能时,我希望它自动突出显示。同样适用于任何其他'功能'字样,'()','''以及用户输入的许多其他字词。

I am making an app that involves coding and I need edittext to recognize if the word typed was 'something' then depending if it is registered to be colored, it will color the word. Here is what I want to do, when the user is typing and types 'function' I want it to automatically highlight. Same goes to any other 'function' word, '()', ' " ', and many other words the user types.

推荐答案

您可以使用来完成此操作:

You can accomplish this by using a TextWatcher like so:

    editText.addTextChangedListener(new TextWatcher() {
        final String FUNCTION = "function";
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {}

        @Override
        public void afterTextChanged(Editable s) {
            int index = s.toString().indexOf(FUNCTION);
            if (index >= 0) {
                s.setSpan(
                        new ForegroundColorSpan(Color.CYAN),
                        index,
                        index + FUNCTION.length(),
                        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
        }
    });

这篇关于如何为edittext实现一个简单的语法高亮方法?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-24 17:03