TextInputEditText 将输入的字符计为 2 个字符

Question

TextInputEditText有最大输入字符数的限制，比如30个，需要输入@字符的时候算2个，即如果只输入@，就不能再输入了超过 15 个字符。如何实现这样的算法？

Answer 1

找到解决方案，与 textChanges() RxJava 一起运行

fun charDoubleLength(string:String, charDouble: Char, editText: EditText, maxLengthLine: Int){
        val charCount = string.filter { char ->
            char == charDouble
        }.count()
        val maxLengthEditText= maxLengthLine - charCount
        editText.filters =
            arrayOf<InputFilter>(InputFilter.LengthFilter(maxLengthEditText))
    }