发送扩展功能我在下面有一些扩展功能功能。我可以通过功能参数
fun EditText.setEmailValidationListener(): TextWatcher {
val textWatcher = object : TextWatcher {
override fun beforeTextChanged(text: CharSequence?, start: Int, count: Int, after: Int) { }
override fun onTextChanged(text: CharSequence?, start: Int, before: Int, count: Int) { }
override fun afterTextChanged(text: Editable?) { validateEmail() }
private fun validateEmail(): Boolean {
if (validateEmailFormat(showError = false)) {
getParentInputLayout()?.isErrorEnabled = false
return true
}
return false
}
}
addTextChangedListener(textWatcher)
return textWatcher
}
fun EditText.setPasswordValidationListener(): TextWatcher {
val textWatcher = object : TextWatcher {
override fun beforeTextChanged(text: CharSequence?, start: Int, count: Int, after: Int) { }
override fun onTextChanged(text: CharSequence?, start: Int, before: Int, count: Int) { }
override fun afterTextChanged(text: Editable?) { validateEmpty() }
private fun validatePasswordText(): Boolean {
if (validateEmptyText(showError = false)) {
getParentInputLayout()?.isErrorEnabled = false
return true
}
return false
}
}
addTextChangedListener(textWatcher)
return textWatcher
}
fun EditText.validateEmailFormat(showError: Boolean = true): Boolean
{
// Do something checking the Email
return false
}
fun EditText.validatePasswordText(showError: Boolean = true): Boolean
{
// Do something checking the Password
return false
}
private fun EditText.getParentInputLayout(): TextInputLayout? {
if (parent is TextInputLayout) {
return parent as TextInputLayout
}
return null
}
两个setEmailValidationListener
和setPasswordValidationListener
是相同的,除了验证函数它们分别使用即validateEmailFormat
和validatePasswordFormat
。
所以我打算重构两种功能共同的代码放到一个共同的功能如下
fun EditText.setupTextChangeListener(validatorFunc : (showError: Boolean) -> Boolean): TextWatcher {
val textWatcher = object : TextWatcher {
override fun beforeTextChanged(text: CharSequence?, start: Int, count: Int, after: Int) { }
override fun onTextChanged(text: CharSequence?, start: Int, before: Int, count: Int) { }
override fun afterTextChanged(text: Editable?) { validateEmpty() }
private fun validateEmpty(): Boolean {
if (validatorFunc(false)) {
getParentInputLayout()?.isErrorEnabled = false
return true
}
return false
}
}
addTextChangedListener(textWatcher)
return textWatcher
}
...它基本上只是在validationFunc
发送作为参数传递给它。
但是,我找不到任何将EditText.validateEmailFormat
和EditText.validatePasswordFormat
发送到validationFunc
函数参数的方法。
我怎么能做到这一点?
除了上面的解释,我建议增加一个使用'validatorFunc:EditText。(showError:Boolean) - > Boolean'的例子。例如:'editText.setupTextChangeListener(EditText :: validateEmailFormat)' – mfulton26
绝对喜欢! – Elye