检查是否具有的EditText特定的字符 [英] Check if EditText has specific character

问题描述

我搜索了一会儿，但找不到如何检查字符串中的特定字符在一个EditText类型？

I searched a while but could not find how to check for a specific character in a string that was typed in an EditText?

推荐答案

通过使用TextWatcher，可以实现左右。

By using TextWatcher, you can achieve so.

        editText.addTextChangedListener(new TextWatcher() {
        public void afterTextChanged(Editable s) {
        }

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

        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
            Log.i(TAG, "specific character = " + s.charAt(count-1));
        }
    });

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