输入监听器
方便起见，在activity的内部写一个内部类，用来监听输入
编写监听器
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| inner class EditWatcher : TextWatcher {
override fun afterTextChanged(s:Editable) {
}
override fun beforeTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
}
override fun onTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
}
}
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注意
- 把Editable直接toString()就是用户当前的输入
使用监听器
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| et.addTextChangedListener(EditWatcher())
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效果
1. 自动隐藏输入法面板
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| private inner class EditWatcher(val type:String, val len:Int, val edit:EditText) : TextWatcher {
override fun afterTextChanged(s:Editable) {
var str:String = s.toString()
if (str.indexOf("\n") >= 0 || str.indexOf("\r") >= 0 || str.indexOf(" ") >= 0) {
str = str.replace("\r", "").replace("\n", "").replace(" ", "")
}
if (str.length > len) {
toast("${type}最长${len}位！")
edit.setText(str.substring(0, len))
val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
if (imm.isActive) {
imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS)
}
}
}
override fun beforeTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
}
override fun onTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
}
}
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